CN101036263A

CN101036263A - Antenna device and wireless terminal using the antenna device

Info

Publication number: CN101036263A
Application number: CN 200580033520
Authority: CN
Inventors: 佐藤润二
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2004-10-01
Filing date: 2005-09-12
Publication date: 2007-09-12

Abstract

The present invention aims at providing an antenna apparatus which enables switching directivity suitable for a plurality of usage patterns of a wireless terminal, such as that achieved during voice conversation and that achieved during data communication, and is easily slimmed down, as well as providing a wireless terminal using the antenna apparatus. An antenna apparatus 1 of the present invention includes a linear radiating element 3 placed on a first plane; a first parasitic element 6 placed on the first plane in parallel with the radiating element 3; a first ground conductor 5 placed on the first plane; a first switch 7 which connects both ends of the first parasitic element 6 to the first ground conductor; and a second ground conductor 8 placed on a second plane opposing the first plane, wherein a part of the first ground conductor 5 is placed in parallel with the radiating element 3 and on a side opposite the first parasitic element 6 with the radiating element 3 sandwiched therebetween; and the second ground conductor 8 is placed opposite the radiating element 3, and ends of the second ground conductor 8 oppose an area sandwiched between the radiating element 3 and the first parasitic element 6. An antenna device the directivity of which can be changed to the one suitable for one of the use modes such as a speech conversation mode and a data communication mode of a wireless terminal and the thickness of which can be easily reduced and a wireless terminal using such an antenna device are provided. The antenna device (1) comprises a linear radiating element (3) disposed on a first surface, a first parasitic element (6) oriented parallel to the radiating element (3) and disposed on the first surface.

Description

Antenna assembly and the wireless terminal that uses this antenna assembly

Technical field

The present invention relates to the wireless terminal of antenna assembly and built-in this antenna assembly, more specifically, relate to a kind of wireless terminal that comprises the built-in aerial of function with electricity change directional characteristic.

Background technology

Recently, in the field of the wireless terminal such as cell phone, the demand of the data communication function except that the voice conversation function is being increased, catching on and have the two wireless terminal of voice conversation function and data communication function simultaneously.Has under the two the situation of wireless terminal of voice conversation function and data communication function described wireless terminal and use position between the user of this wireless terminal to close to tie up between the situation of the situation of carrying out voice conversation and execution data communication and change at the same time.

For example, under the situation of voice conversation, described user uses wireless terminal, a feasible ear that this terminal is pressed into this user, can see from Figure 10, wherein be illustrated in example location relation that adopted during the voice conversation, between described wireless terminal and the described user.Thereby, be placed on the side of described user's head when using described wireless terminal.On the contrary, under the situation of data communication, described user confirms to be apparent in the information on the display screen of described wireless terminal, can see from Figure 11, wherein be illustrated in adopted during the data communication, described wireless terminal concerns with example location between the described user.Be placed on a distance, described user's head the place ahead when for this reason, using described wireless terminal.

As mentioned above, when changing, need the described directional characteristic of the antenna assembly that this wireless terminal is built-in to change into and be fit to the directional characteristic that this position concerns when described wireless terminal and between the situation of the situation of using described position between the described user of this wireless terminal to close to tie up to voice conversation and data communication.Figure 12 shows the example radiation directivity at the described antenna of obtaining during the voice conversation and obtain particularly during data communication.

For example, need the configuration unidirectional antenna, make that the greatest irradiation direction of described antenna is towards the back side of this wireless terminal when under the voice communication situation described wireless terminal being placed described head side so that can switching direction; And make that when under the data communication situation described wireless terminal being placed certain distance position, described user's head the place ahead, the greatest irradiation direction of described antenna is towards the top-direction of this wireless terminal.In brief, it is unidirectional requiring the built-in antenna assembly of described wireless terminal, and has such configuration, its feasible greatest irradiation direction that can switch the described antenna that is obtained in each use pattern; Also promptly, during voice conversation and data communication, from the top of described wireless terminal to the back side of described wireless terminal.

By the configuration of such antenna assembly, avoid radiation field from described antenna assembly towards described human body, making can enhanced SAR (specific absorption rate).Further, owing to avoided the electromagnetic radiation on the unnecessary direction and then realized one-way, can make it possible to attempt strengthening antenna gain.

For example, proposed a kind of so far by the antenna configurations of reciprocally switching the directivity of Yagi antenna by using control element to control the length of parasitic antenna, antenna configurations (for example, seeing patent documentation 1) as the directivity that can switch described antenna.

Figure 46 is the schematic diagram of the directivity switched antenna of the prior art of description in the patent documentation 1.Among Figure 46, a pair of parasitic antenna of reference numerals 101 representatives; 102 represent feeder line (feeder) element; 103 represent auxiliary element; And 104 represent control element.

Below will the operation of the directivity switched antenna of the prior art of description in the patent documentation 1 be described.In the directivity switched antenna of prior art, parasitic antenna 101 is placed on the given interval on feeder line element 102 side surface direction.Each is configured to make that control element 104 can be connected to auxiliary element 103 end portion of parasitic antenna 101 in the parasitic antenna 101, and auxiliary element 103 additionally provides in the electric insulation mode.Control element 104 usefulness diode switches and so on form, and add by this way: with control element 104 and one of them parasitic antenna 101 and auxiliary element 103 conductings that provide at its associated end place.

So, when by lead when parasitic antenna 101 applies positive voltage, one of them parasitic antenna 101 and auxiliary element 103 conductings that provide at its associated end place, thus take on reflector.Remaining parasitic antenna 101 not with auxiliary element 103 conductings, thereby take on guider.Therefore, the antenna of patent documentation 1 shows the directivity on the direction that keeps not with the parasitic antenna 101 of auxiliary element 103 conductings.When by described lead when parasitic antenna 101 applies negative voltage, take on the parasitic antenna 101 of described reflector and the position relation taken between the parasitic antenna 101 of described guider is inverted, and thereby directivity be inverted too.

By adopting top configuration, can dispose can be by the Yagi antenna of simple control (also promptly, switching the polarity of the voltage that is applied to parasitic antenna 101) with 180 ° of directivity counter-rotatings.

A kind of antenna configurations that places on the base plate and parasitic antenna is provided around described antenna element that antenna element is erect has also been proposed in addition, it comes switching direction (for example, seeing patent documentation 2) by the function of described parasitic antenna is switched between guider and reflector.

Figure 47 is the schematic diagram of the directivity switched antenna of the prior art of description in the patent documentation 2.Among Figure 47, reference numerals 111 is represented base plate; 112 represent radiant element; 113 to 116 represent parasitic antenna; And 117 to 120 represent dielectric base plate.

Below will the operation of the directivity switched antenna of the prior art of description in the patent documentation 2 be described.The radiant element 112 that to take on radiator places on the base plate of being realized by dielectric base plate 117 to 120 111.The parasitic antenna 113 to 116 that to take on reflector or guider is installed on the dielectric base plate 117 to 120.Dielectric base plate 117 to 120 is straightened and places on the base plate 111.

Base plate 111 is equipped with and is used for (a plurality of) switching circuit that the function of parasitic antenna 113 to 116 is switched between reflector and guider.Other switching circuit is opened circuit in one of them short circuit of described switching circuit, thereby give described antenna with directivity.For example, select described switching circuit by this way, so that parasitic antenna 113 is taken on conductor, and make other parasitic antenna 114 to 116 take on reflector, thereby the directivity of described antenna can be oriented to towards parasitic antenna 113.Similarly, with wherein any one short circuit of described switching circuit of parasitic antenna 114 to 116, thereby make it possible to directivity switch to 90 ° of spaced four directions wherein any one.

By adopting top configuration, can constitute can be by simple control (also promptly, cause short circuit and open circuit described switching circuit) with 90 ° of antennas of switching directions at interval.Further, parasitic antenna 113 to 116 is formed on the dielectric base plate 117 to 120.Therefore, increase the dielectric constant of dielectric base plate 117 to 120, so that shorten the length of parasitic antenna 113 to 116 by the effect of wavelength decreases.So, the profile that can make it possible to attempt dwindling described antenna.

For example, the configuration that the another kind that has proposed can switch the antenna assembly of its directivity is the grounded metal conductor to be divided into two subdivisions, and to change the electrical length of described whole grounded metal conductor by switch, thereby switching direction (for example, seeing patent documentation 3).

Figure 48 is the schematic diagram of the directivity switched antenna of the prior art of description in the patent documentation 3.Among Figure 48, described directivity switched antenna comprises: antenna element 301; Be used for match circuit 302 that antenna element 301 and receiving circuit 303 are mated; Be used for carry out effect received field intensity comparator 304 relatively from the intensity of the signal of receiving circuit 303; Be used to enable and the control circuit 305 of inactive HF switch 308; Be divided into the grounded metal conductor 306 and 307 of two subdivisions, the earthing conductor that it is connected in series to antenna element 301 and is equivalent to described antenna assembly; And two HF switch 308.

Below will the operation of the directivity switched antenna of the prior art of description in the patent documentation 3 be described.The electromagnetic wave that is received by antenna element 301 is delivered to receiving circuit 303 via match circuit 302.Further, control circuit 305 control HF switch 308 make described HF switch so that the time interval repeats to enable and stop using arbitrarily.As shown in Figure 49 (a), when being activated, HF switch 308 shows the radiation directivity that is basically perpendicular to antenna element 301.As shown in Figure 49 (b), when being deactivated, HF switch 308 shows the directivity characteristic of the radiation directivity characteristic of comparing with the situation of enabling HF switch 308 approximately-30 °.

By adopting top configuration, utilize HF switch 308 electricity to change the length of the grounded metal conductor 306,307 that is connected in series to antenna element 301, make to obtain two types antenna directivity characteristic.

The another kind of antenna configurations that has proposed is, at the afterbody the right and the left position layout antenna reflector of described antenna element, and controls the impedance ground of described antenna reflector, thus switching direction (for example, seeing patent documentation 4).

Figure 50 is the schematic diagram of the directivity switched antenna of the prior art of description in the patent documentation 4.Among Figure 50, described directivity switched antenna comprises: antenna 311; Antenna element 312; Be arranged in respect to the right of antenna element 312 and the antenna reflector 313,314 of left position, it forms by being essentially leg-of-mutton conductor plate; And the formwork 315 that is used for covering protection antenna 311.

Below will the operation of the directivity switched antenna of the prior art of description in the patent documentation 4 be described.Antenna reflector 313,314 is provided at the right, bottom and the left position with respect to antenna element 312, and the impedance ground circuit that provides on the substrate of described radio parts, be used for the impedance conversion purpose is provided.Figure 51 is the characteristic view that the change of the described antenna characteristics that obtains when the switching carried out between

antenna reflector

313 and 314 is shown.By with they one of them ground connection, carry out the switching between antenna reflector 313,314.

In addition, switch from the described electromagnetic directivity of antenna element 312 radiation, thereby realize diversity feature by the antenna reflector 313,314 that is connected to ground via described impedance ground circuit.When having carried out the switching between antenna reflector 313,314 and then having selected antenna reflector 314 as the earth terminal reflector, the directivity and the antenna reflector 314 of antenna element 312 disturb as shown in Figure 51 (a), thereby show directivity to the right.On the contrary, when having selected antenna reflector 313, the directivity and the antenna reflector 313 of antenna element 312 disturb as shown in Figure 51 (b), thereby show directivity left.

By adopting top configuration, by the straightforward procedure of the described impedance ground circuit that is operatively connected to antenna reflector 313,314 and with one of them antenna reflector ground connection, can be with respect to antenna element 312 to the left or to the right with 180 ° of switching directions.

Patent documentation 1:JP-A-6-69723

Patent documentation 2:JP-A-2001-345633

Patent documentation 3:JP-A-5-48506

Patent documentation 4:JP-A-2001-292017

Summary of the invention

The problem to be solved in the present invention

Yet,, for example conductive pattern can be formed on the dielectric base plate 117 to 120 by the described configuration of using relevant patent documentation 1 to describe.Therefore, antenna assembly is suitable for being built in the wireless terminal.Because only can be, be difficult to realize to be suitable for the directivity of the antenna assembly of the use pattern that described wireless terminal obtains at wireless terminal that obtain during the voice conversation and described during data communication with 180 ° of reciprocal switching directions.

By the configuration of using relevant patent documentation 2 to describe, can switch the directivity of described antenna with 90 ° of intervals by switching described switch.But,, base plate 111 must be provided on the square position of the dielectric base plate 117 to 120 that in described wireless terminal, provides in order between the top-direction of described wireless terminal and back side direction, to switch.Therefore, the profile of dwindling described wireless terminal has just run into difficulty.

Configuration by using relevant patent documentation 3 to describe for example can form described grounded metal conductor with the conductive pattern on shell or the dielectric base plate, thereby can change the electrical length of described grounded metal conductor like a cork, and then changes directivity.But, described grounded metal conductor must be connected in series to described antenna element.Therefore, this configuration has such problem, and it only is applicable to monopole antenna elements, and is not suitable for the antenna element of dipole antenna balanced feeding system.

Configuration by using relevant patent documentation 4 to describe forms antenna reflector in antenna casing, make and described antenna element can be merged to described wireless terminal.Described antenna reflector can be applied to antenna element such as the balanced feeding system of dipole as antenna element.But, only can be with 180 ° of switching directions to the right and left.Therefore, existence can't realize being suitable for that described wireless terminal obtains that each uses the problem of directivity of the described antenna assembly of pattern during voice conversation and data communication.

The present invention conceives according to top situation, and aim to provide a kind of can switch be fit to wireless terminal such as antenna assembly in the directivity of the multiple use pattern that obtains during the voice conversation or during data communication, obtain, the wireless terminal that uses this antenna assembly is provided simultaneously.

Solve the means of described problem

A kind of antenna assembly of the present invention comprises: the radiant element that is arranged in the wire on first plane; First parasitic antenna is parallel to described radiant element and is arranged on described first plane; Be arranged in first earthing conductor on described first plane; First switch is used for the two ends of described first parasitic antenna are connected to described first earthing conductor; Second earthing conductor is arranged on second plane opposite with described first plane; And the control device that is used to control the short circuit of described switch/open circuit, wherein, the part of described first earthing conductor is parallel to described radiant element, is arranged in the offside of described first parasitic antenna, and described radiant element is between between it; And described second earthing conductor is positioned at the reverse side of described radiant element, and the end of described second earthing conductor is at the reverse side in the zone between described radiant element and described first parasitic antenna.

A kind of antenna assembly of the present invention comprises: the radiant element that is arranged in the wire on first plane; First parasitic antenna of wire is parallel to described radiant element, is arranged on described first plane; The auxiliary element of the wire that provides at the vertical imaginary extended line two ends of described first parasitic antenna; Be arranged in first earthing conductor on described first plane; First switch is used for the two ends of described first parasitic antenna are connected to described auxiliary element; And second earthing conductor, be arranged on second plane opposite with described first plane, wherein, described first earthing conductor is parallel to described radiant element, is arranged in the offside of described first parasitic antenna, and described radiant element is between between it; And described second earthing conductor is positioned at the reverse side of described radiant element, and the end of described second earthing conductor is at the reverse side in the zone between described radiant element and described first parasitic antenna.

In described antenna assembly of the present invention, described first earthing conductor is the linear conductor longer than described radiant element.

A kind of antenna assembly of the present invention comprises: the radiant element that is arranged in the wire on first plane; First parasitic antenna of wire is parallel to described radiant element, is arranged on described first plane; , second parasitic antenna of wire is parallel to described radiant element, is provided at the offside of the above first parasitic antenna of described first plane, and described radiant element is between between it; The auxiliary element of the wire that provides at the vertical imaginary extended line two ends of described first and second parasitic antennas respectively; First switch and second switch are used for the described auxiliary element that provides on the both sides of described first and second parasitic antennas respectively is provided at the two ends of described first and second parasitic antennas; And second earthing conductor, be arranged on second plane opposite with described first plane, wherein, described second earthing conductor is positioned at the reverse side of described radiant element, and an end of described second earthing conductor is at the reverse side in the zone between described radiant element and described first parasitic antenna, and another end of described second earthing conductor is at the reverse side in the zone between described radiant element and described second parasitic antenna.

Described antenna assembly of the present invention comprises first substrate, and it has surface that described radiant element, described first and second parasitic antennas, described first earthing conductor and described first and second switches are provided and another surface that described second earthing conductor is provided thereon thereon.

Described antenna assembly of the present invention further comprises the control device of the short circuit that is used to control described switch/open circuit.

When the use pattern of described wireless terminal when voice conversation is changed into data communication, the antenna assembly of prior art can not change to desired direction with the greatest irradiation direction of described antenna according to described use pattern.Therefore, this antenna configurations is not suitable for described wireless terminal.On the other hand, according to top configuration, when described switch during by short circuit, described parasitic antenna is as earthing conductor work, thus with described earthing conductor cover described radiant element around.When described switch was opened circuit, described parasitic antenna disconnected from described earthing conductor, thereby can the directivity of described antenna be switched to desired direction by the described switch of short circuit/open circuit.

Described antenna assembly of the present invention comprises such configuration, and wherein, when described switch was opened circuit, described parasitic antenna was taken on the guider with respect to described radiant element.

By this configuration, can make described parasitic antenna take on guider.Thereby, when described switch is opened circuit, can form the described configuration of Yagi antenna with described radiant element and described parasitic antenna.When described switch keeps by short circuit, can be with about 90 ° of directivity of switching described antenna.

Described antenna assembly of the present invention comprises such configuration, and wherein, when described switch during by short circuit, described parasitic antenna and described auxiliary element are taken on the reflector with respect to described radiant element.

By this configuration, can described parasitic antenna be switched between described guider and described reflector by the short circuit/described switch that opens circuit.Thereby, when described switch keeps by short circuit, can be with the directivity of about 90 ° of described antennas of switching with described parasitic antenna not being connected to described earthing conductor.

Described antenna assembly of the present invention comprises the described parasitic antenna that its reactance is variable.

Described antenna assembly of the present invention comprises the described parasitic antenna that the switch that a plurality of conductor pieces link together is formed by being used for.

Described antenna assembly of the present invention comprises that it is the described parasitic antenna of variable-capacitance element.

According to this configuration, can change the electrical length of described parasitic antenna.Thereby, the directivity of the described antenna that obtains during can changing described switch and opening circuit.Further, also can adjust the input impedance characteristic of described antenna.

Described antenna assembly of the present invention comprises the described substrate that is formed by dielectric substance.

By this configuration, the wavelength decreases effect that can cause by the dielectric constant by described dielectric base plate shortens the electrical length of described radiant element.Thereby, can attempt described antenna microminiaturization.

Described antenna assembly of the present invention comprises the described substrate that is formed by expanded material.

By this configuration, form described radiant element, described parasitic antenna and so on by this way, make them can experience compressing tablet and handle.The element that shapes like this is fixed to described expanded material, thus can be with the mode manufacturing direction switched antenna that is dirt cheap.

Described antenna assembly of the present invention comprises along the described radiant element folding with respect to the described first level of base plate direction.

By this configuration, can strengthen the input impedance of described radiant element.Even near described earthing conductor is placed in the limit of described radiant element and when causing described input impedance to reduce, also can realize coupling like a cork with described feeding pack.

Described antenna assembly of the present invention comprises by conductive pattern and is formed on described radiant element on described first substrate.

By this configuration, can integrally make described radiant element and described substrate, thereby can realize cheap production.Further, also can attempt realizing more stable properties.

Described antenna assembly of the present invention comprises by conductive pattern and is formed on described second earthing conductor on described first substrate.

By this configuration, can integrally make described second earthing conductor and described substrate, thereby can accurately locate the end portion of placing described second earthing conductor, and can make described characteristic more stable.

Described antenna assembly of the present invention comprises the described radiant element and described second earthing conductor of such arrangement, makes that the interval between described radiant element and described second earthing conductor becomes greater than the thickness of described first substrate.

By this configuration, can guarantee the distance between described radiant element and described second earthing conductor.Thereby, the decline of the input impedance of described radiant element can be avoided taking place, and the coupling with described feeding pack can be realized like a cork.

In described antenna assembly of the present invention, described radiant element has the dipole configuration that comprises along the structure folding with respect to the vertical direction of described substrate, and comprise the bottom conductor that is positioned on described first substrate, the two ends that are positioned at described bottom conductor are along with respect to the folded part of the vertical direction of described first substrate and the upper conductor of arranging the end that is used to connect described folded end.

By this configuration, can arrange described radiant element in the mode of three dimensional fold.Thereby, increased the design freedom of described antenna, and can reduce the employed zone of described antenna is installed.

Second substrate that provides on described first substrate further is provided described antenna assembly, and wherein, described bottom conductor is between described first and second substrate; Provide described folded part to make it penetrate described second substrate; And on described second substrate, provide described upper substrate.

By this configuration, can form radiant element by substrate being made multilayer with foldable structure.Thereby, can make described antenna assembly more at an easy rate, and can make described characteristic more stable.

Described antenna assembly further comprises the electrolyte blocks on described first substrate, wherein, is provided at described bottom conductor, described folded part and described upper conductor on the described electrolyte blocks and/or in the described electrolyte blocks.

In described antenna assembly of the present invention, be provided at the part of described parasitic antenna, described switch and described first earthing conductor on the described electrolyte blocks and/or in the described electrolyte blocks.

By this configuration, can in the described electrolyte blocks of making by the high dielectric material, arrange described radiant element and/or described parasitic antenna in the mode of three dimensional fold.Thereby, increased the design freedom degree of described antenna, and can be very little so that the employed zone of described antenna is installed.In addition, can produce dielectric antenna with directivity handoff functionality.

In described antenna assembly of the present invention, described radiant element can be formed the wire dipole.

According to this configuration, can make described radiant element very simply.In addition, described antenna can form the Yagi antenna configuration with described parasitic antenna.Thereby, can realize with 90 ° of switching directions.

In described antenna assembly of the present invention, described radiant element formation can be had tortuous nemaline dipole.

By this configuration, can be so that described radiant element be very little.

In described antenna assembly of the present invention, described first and second switches are formed by diode switch.

In described antenna assembly of the present invention, described first and second switches are formed by the FET switch.

In described antenna assembly of the present invention, described first and second switches are formed by mems switch.

By these configurations, can realize described switch with unusual simple configuration.Further, can make described switch very compact by using described MEMS technology.Thereby, can attempt described antenna microminiaturization.

A kind of antenna assembly of the present invention comprises: the radiant element that is arranged in the wire on first plane; Earthing conductor is arranged on second plane as another surface of described first substrate; First conductor is arranged on described second plane, simultaneously and described earthing conductor electric insulation; And first switch, be used for described earthing conductor is connected to described conductor, wherein, one of them is positioned at the reverse side of described radiant element described earthing conductor and described conductor.

Described antenna assembly of the present invention further comprises: second conductor is arranged in the position with respect to described earthing conductor and the described first conductor symmetry; And second switch, be used for described earthing conductor is connected to described second conductor, wherein, described earthing conductor is positioned at the reverse side of described radiant element.

Described antenna assembly of the present invention further comprises first substrate that described first and second planes are provided on it.

Described antenna assembly of the present invention comprises the described earthing conductor of the reverse side that is arranged in described radiant element.

Described antenna assembly of the present invention comprises the described conductor of taking on respect to the guider of described radiant element.

Described antenna assembly of the present invention comprises the described conductor of the reverse side that is arranged in described radiant element.

Described antenna assembly of the present invention comprises the described conductor longer than described radiant element.

When the use pattern of described wireless terminal when voice conversation is changed into data communication, the antenna assembly of prior art can not change to desired direction with the greatest irradiation direction of described antenna with 90 ° according to described use pattern.Therefore, this antenna configurations is not suitable for described wireless terminal.On the other hand, according to top configuration, when described switch during by short circuit, described first metallic conductor is as earthing conductor work.When described switch was opened circuit, described first metallic conductor disconnected from described earthing conductor, thereby can the directivity of described antenna be switched to desired direction by the described switch of short circuit/open circuit.

Described antenna assembly of the present invention comprises the described conductor that its reactance is variable.

Described antenna assembly of the present invention comprises the described conductor with variable-capacitance element.

In described antenna assembly of the present invention, the 3rd switch that described conductor is included in a plurality of conductor pieces of dividing on its longitudinal direction and is used to connect described a plurality of conductor pieces.

By these configurations, can change the electrical length of described first metallic conductor.Thereby, when described switch is opened circuit, can adjust the directivity of described antenna.Further, also can adjust the input impedance characteristic of described antenna.

In described antenna assembly of the present invention, the 3rd switch that described conductor is included in its a plurality of conductor pieces of dividing in a lateral direction and is used to connect described a plurality of conductor pieces.

By these configurations, can change the transverse electric length of described first metallic conductor.Thereby, when described switch is opened circuit, can adjust the directivity of described antenna.

Described antenna assembly of the present invention comprises described first substrate that is formed by dielectric substance.

Described antenna assembly of the present invention comprises described first substrate that is formed by expanded material.

By this configuration, form described first metallic conductor and so on by this way, make it can experience compressing tablet and handle.First metallic conductor that shapes like this is fixed to described expanded material, thus can be with the mode manufacturing direction switched antenna that is dirt cheap.

In described antenna assembly of the present invention, described first switch is included in a plurality of switches that are used for described earthing conductor is connected to described first metallic conductor on a plurality of positions.

In described antenna assembly of the present invention, with respect to providing described a plurality of the 3rd switch with the pattern of symmetry with described radiant element quadrature, the plane that comprises its distributing point.

In described antenna assembly of the present invention, with respect to described radiant element quadrature, comprise that the plane of its distributing point provides described a plurality of the 3rd switch with asymmetric pattern.

In described antenna assembly of the present invention, described the 3rd switch is connected to described earthing conductor described first metallic conductor of the position that is positioned at the reverse side of the periphery of maximum voltage position on the described radiant element.

The necessity that whole described earthing conductor is connected to whole described first metallic conductor has been eliminated in these configurations.Can come switching direction by using required minimum switch.In addition, with respect to the described switch of the longitudinal direction of described radiant element asymmetric position short circuit, thereby the three-dimensional of directivity is switched and is become feasible.

Described antenna assembly of the present invention comprises by conductive pattern and is formed on described earthing conductor on described first substrate.

By this configuration, can integrally make described earthing conductor and described substrate, thereby can realize cheap production.Further, also can attempt realizing more stable properties.

Described antenna assembly of the present invention comprises the described radiant element and the described earthing conductor of such arrangement, makes that the interval between described radiant element and described second earthing conductor becomes greater than the thickness of described first substrate.

By this configuration, can guarantee the distance between described radiant element and the described earthing conductor.Thereby, the decline of the input impedance of described radiant element can be avoided taking place, and the coupling with described feeding pack can be realized like a cork.

In described antenna assembly of the present invention, described radiant element has the dipole configuration that comprises along the structure folding with respect to the vertical direction of described substrate, and described radiant element comprises the bottom conductor that is positioned on described first substrate, the two ends that are positioned at described bottom conductor are along with respect to the folded part of the vertical direction of described first substrate and the upper conductor of arranging the end that is used to connect described folded end.

By this configuration, can arrange described radiant element in the mode of three dimensional fold.Thereby, increased the degree of the design freedom of described antenna, and can reduce the employed zone of described antenna is installed.

By this configuration, can form radiant element by substrate being made sandwich construction with foldable structure.Thereby, can make described antenna assembly more at an easy rate, and can make described characteristic more stable.

By this configuration, can in the described electrolyte blocks of making by the high dielectric material, arrange described radiant element and/or described parasitic antenna in the mode of three dimensional fold.Thereby, increased the degree of the design freedom of described antenna, and can be very little so that the employed zone of described antenna is installed.In addition, can produce dielectric antenna with directivity handoff functionality.

According to this configuration, can make described radiant element very simply.

In described antenna assembly of the present invention, described radiant element can be formed and have tortuous nemaline dipole.

By this configuration, can be so that described radiant element be very little.

A kind of wireless terminal of the present invention comprises: described antenna assembly of the present invention; Be used for transceiver unit by described antenna assembly transmitting/receiving wireless electric wave; Be used to switch the antenna directivity switching part of the directivity of described antenna assembly; And the control assembly that is used to control each parts, wherein, described control assembly switches the directivity of described antenna assembly and impels described transceiver unit to receive radio wave by impelling described antenna directivity switching part, control described antenna directivity switching part and described transceiver unit, make its directivity be confirmed as showing the described antenna assembly execution transmission of superior receiving sensitivity and receiving according to detected intensity of radio wave.

In described wireless terminal of the present invention, described control assembly executive control operation, operate to impel described antenna assembly in accepting state, to carry out diversity reception, and impel described antenna assembly in transmit status, to carry out transmission with the described directivity of in accepting state, using.

By this configuration, even in multi-path environment, also can carry out diversity reception by the directivity of switching individual antenna.Thereby, can realize high-quality communication.

In described wireless terminal of the present invention, described control assembly executive control operation, in accepting state, carry out the diversity reception operation to impel described antenna assembly, and impel described antenna assembly in transmit status, to carry out with such directivity to send, the greatest irradiation direction of described antenna assembly is orientated in the opposite direction along the side with user from described wireless terminal to this wireless terminal therein.

By this configuration, even in multi-path environment, also can carry out diversity reception by the directivity of switching individual antenna.Thereby, can realize high-quality communication.By way of parenthesis, during sending, the directivity of described antenna is not towards the user who uses described wireless terminal.Therefore, can enhanced SAR.

Advantage of the present invention

Antenna assembly according to the present invention and the described wireless terminal that uses this antenna assembly can be by short circuit and disconnects and switch the directivity of described antenna overleaf between direction and the top-direction.Even when the use pattern of described wireless terminal changes under the situation of speech and data communication, the directivity that also can change described antenna is with to described use pattern the best, thereby can realize high-quality communication.

Description of drawings

Fig. 1 is the schematic diagram according to the directivity switched antenna of the first embodiment of the present invention;

Fig. 2 is the principle that is used to switch according to the operation of the directivity of the described directivity switched antenna of the first embodiment of the present invention;

Fig. 3 (a) is the sectional view that obtains when the G=D according to the described directivity switched antenna of the first embodiment of the present invention; And Fig. 3 (b) switches the obtained directivity of described switch when the G=D according to the described directivity switched antenna of the first embodiment of the present invention;

Fig. 4 (a) is the sectional view that described directivity switched antenna according to the first embodiment of the present invention o'clock obtains in G≤0; And Fig. 4 (b) is that described directivity switched antenna according to the first embodiment of the present invention is in the obtained directivity of the described switch of G≤0 o'clock short circuit;

Fig. 5 (a) is the sectional view that obtains when the G=D/4 according to the described directivity switched antenna of the first embodiment of the present invention; And Fig. 5 (b) switches the obtained directivity of described switch when the G=D/4 according to the described directivity switched antenna of the first embodiment of the present invention;

Fig. 6 (a) is the sectional view that obtains when the G=D/2 according to the described directivity switched antenna of the first embodiment of the present invention; And Fig. 6 (b) switches the obtained directivity of described switch when the G=D/2 according to the described directivity switched antenna of the first embodiment of the present invention;

Fig. 7 (a) is the sectional view that obtains when the G=3/4 * D according to the described directivity switched antenna of the first embodiment of the present invention; And Fig. 7 (b) switches the obtained directivity of described switch when the G=3/4 * D according to the described directivity switched antenna of the first embodiment of the present invention;

Fig. 8 (a) is the sectional view that obtains when the G=19/20 * D according to the described directivity switched antenna of the first embodiment of the present invention; And Fig. 8 (b) switches the obtained directivity of described switch when the G=19/20 * D according to the described directivity switched antenna of the first embodiment of the present invention;

Fig. 9 switches the obtained greatest irradiation direction handoff angle of described switch when 0≤G＜D according to the described directivity switched antenna of the first embodiment of the present invention;

Figure 10 is the view that is illustrated in the wireless terminal that obtains during the voice conversation and the relation of the example location between the user;

Figure 11 is the view that is illustrated in the wireless terminal that obtains during the data communication and the relation of the example location between the user;

Figure 12 is the view that is illustrated in the example radiation directivity characteristic that described antenna is obtained during voice conversation and the data communication;

Figure 13 is the schematic diagram of directivity switched antenna according to a second embodiment of the present invention;

Figure 14 is the schematic diagram of directivity switched antenna according to a second embodiment of the present invention;

Figure 15 is the schematic diagram of the directivity switched antenna of a third embodiment in accordance with the invention;

Figure 16 is the view that illustrates about the relation between the directivity of the handover operation of the switch of the third embodiment of the present invention and antenna;

Figure 17 is the schematic diagram that the directivity switched antenna of a fourth embodiment in accordance with the invention is shown;

Figure 18 is the view of example arrangement that the radiant element that has in X-Y plane folding structure of a fourth embodiment in accordance with the invention is shown;

Figure 19 is the view of example arrangement that the radiant element that has in the Y-Z plane folding structure of a fourth embodiment in accordance with the invention is shown;

Figure 20 is to use the schematic diagram of described directivity switched antenna of the radiant element of the wherein a kind of foldable structure with fourth embodiment of the present invention;

Figure 21 is the schematic diagram of the described directivity switched antenna of the dielectric base plate of the use of a fourth embodiment in accordance with the invention with sandwich construction;

Figure 22 is the schematic diagram of directivity switched antenna of the use electrolyte blocks of a fourth embodiment in accordance with the invention;

Figure 23 is the schematic diagram of wireless terminal according to a fifth embodiment of the invention;

Figure 24 is the schematic diagram of directivity switched antenna according to a sixth embodiment of the invention;

Figure 25 is the principle of operation that is used to switch the directivity of described directivity switched antenna according to a sixth embodiment of the invention;

Figure 26 is the example arrangement of described directivity switched antenna according to a sixth embodiment of the invention;

Figure 27 (a) is the directivity that described directivity switched antenna according to a sixth embodiment of the invention obtains when described switch is switched; And Figure 27 (b) is the view that the example directivity that obtains when the length of first metallic conductor of according to a sixth embodiment of the invention described directivity switched antenna is changed is shown;

Figure 28 is the example arrangement of described directivity switched antenna according to a sixth embodiment of the invention;

Figure 29 (a) is the directivity that described directivity switched antenna according to a sixth embodiment of the invention obtains when described switch is switched; And Figure 29 (b) is the view that the example directivity that obtains when the length of first metallic conductor of according to a sixth embodiment of the invention described directivity switched antenna is changed is shown;

Figure 30 is the view that is illustrated in the wireless terminal that obtains during the voice conversation and the relation of the example location between the user;

Figure 31 is the view that is illustrated in the wireless terminal that obtains during the data communication and the relation of the example location between the user;

Figure 32 is the view that is illustrated in the example radiation directivity characteristic that described antenna is obtained during voice conversation and the data communication;

Figure 33 is the example arrangement of described directivity switched antenna according to a sixth embodiment of the invention;

Figure 34 is the schematic diagram of directivity switched antenna according to a seventh embodiment of the invention;

Figure 35 is the directivity of the switch arranged symmetrically with respect to the longitudinal direction of radiant element in according to a seventh embodiment of the invention the directivity switched antenna.

Figure 36 is the directivity of the switch arranged with respect to the longitudinal direction of radiant element in according to a seventh embodiment of the invention the directivity switched antenna asymmetricly.

Figure 37 is the schematic diagram according to the directivity switched antenna of the eighth embodiment of the present invention;

Figure 38 is the view that illustrates about the relation between the directivity of the handover operation of the switch of the eighth embodiment of the present invention and antenna;

Figure 39 is the schematic diagram that illustrates according to the directivity switched antenna of the ninth embodiment of the present invention;

Figure 40 illustrates the view that has according to the example arrangement of the radiant element of the folding structure in the X-Y plane of the directivity switched antenna of the ninth embodiment of the present invention;

Figure 41 illustrates the view that has according to the example arrangement of the radiant element of the folding structure in the Y-Z plane of the directivity switched antenna of the ninth embodiment of the present invention;

Figure 42 illustrates according to the schematic diagram ninth embodiment of the present invention, that use the described directivity switched antenna of the radiant element with structure folding in the Y-Z plane;

Figure 43 is the schematic diagram of the described directivity switched antenna of the dielectric base plate of the use according to the ninth embodiment of the present invention with sandwich construction;

Figure 44 is the schematic diagram according to the described directivity switched antenna of the use electrolyte blocks of the ninth embodiment of the present invention;

Figure 45 is the schematic diagram according to the wireless terminal of the tenth embodiment of the present invention;

Figure 46 is the schematic diagram of directivity switched antenna of the prior art of patent documentation 1;

Figure 47 is the schematic diagram of directivity switched antenna of the prior art of patent documentation 2;

Figure 48 is the schematic diagram of directivity switched antenna of the prior art of patent documentation 3;

Figure 49 is the directivity of directivity switched antenna of the described prior art of patent documentation 3;

Figure 50 is the schematic diagram of directivity switched antenna of the prior art of patent documentation 4;

Figure 51 is the directivity of directivity switched antenna of the described prior art of patent documentation 4.

The reference numerals explanation

1 directivity switched antenna

2 dielectric base plates

3 radiant elements

4 distributing points

5 first earthing conductors

6 parasitic antennas

7 switches

8 second earthing conductors

9 end portion

10 control circuits

11 users

12 wireless terminals

13 display units

14 functional units

15 auxiliary elements

16 reflectors

17 parasitic antennas

18 switches

19 end portion

20 radiant elements

21 bottom conductors

22 folded parts

23 upper conductor

24 dielectric base plates

25 electrolyte blocks

26 transceiver unit

27 control assemblies

28 antenna directivity switching parts

29,30 control signals

101 parasitic antennas

102 electricity supply elements

103 auxiliary elements

104 control elements

111 base plates

112 antenna elements

113 to 116 parasitic antennas

117 to 120 dielectric base plates

201 directivity switched antennas

202 dielectric base plates

203 radiant elements

204 distributing points

205 earthing conductors

206 first metallic conductors

207a, 207b switch

208 end portion

209 control circuits

210 users

211 wireless terminals

212 display units

213 functional units

214 conductor pieces

215 diode switches

216 radiant elements

217 bottom conductors

218 folded parts

219 upper conductor

220 dielectric base plates

221 electrolyte blocks

222 transceiver unit

223 control assemblies

224 antenna directivity switching parts

225,226 control signals

227 second metallic conductors

301 antenna elements

302 match circuits

303 receiving circuits

304 received electric field strength comparators

305 control circuits

306,307 grounded metal conductors

308 HF switch

311 antennas

312 antenna elements

313,314 antenna reflectors

315 formworks

Embodiment

Hereinafter with reference to accompanying drawing to the antenna assembly of embodiments of the invention and use their wireless terminal to be elaborated.

(first embodiment)

Fig. 1 is the schematic diagram according to the directivity switched antenna of the first embodiment of the present invention.Fig. 1 (a) is a perspective view, and Fig. 1 (b) is the sectional view that obtains along the line A-A ' shown in Fig. 1 (a).

Directional switch antenna device 1 comprises: thickness is the dielectric base plate 2 of " t "; By being provided at that linear conductor on the dielectric base plate 2 forms and length is the radiant element 3 of L; Distributing point 4; First earthing conductor 5 is with radiant element 3 coplanes, be provided on the dielectric base plate 2; Length is that (＜L) parasitic antenna 6 with radiant element 3 coplanes, be provided on the dielectric base plate 2, and is basically parallel to radiant element 3 to Ld; Switch 7 is between first earthing conductor 5 and parasitic antenna 6; Second earthing conductor 8 provides on the surface of the reverse side on the surface that radiant element 3 is provided, dielectric base plate 2; The end portion 9 of second earthing conductor 8; And the control circuit 10 that is used for the short circuit of control switch 7 and opens circuit.

To suppose that radiant element 3, first earthing conductor 5, parasitic antenna 6 and second earthing conductor 8 are formed on the dielectric base plate 2 by conductive pattern and are described.These elements are formed on bring following advantage on the dielectric base plate 2: can by by changing wavelength decreases effect that dielectric constant brings with described antenna assembly microminiaturization, that described in addition antenna assembly becomes is cheap, be easy to large-scale production and antenna performance is stable.

To the operation according to the described directional switch antenna device of the first embodiment of the present invention be described now.Be radiated in the air from radiant element 3 from the high-frequency signal of distributing point 4 feeds.Among the present invention, radiant element 3 is described to have the dipole configuration.Fig. 2 illustrates the principle of directivity handover operation of the present invention.When as shown in Fig. 2 (a) (1) when not arranging earthing conductor around the radiant element 3, the directivity of described antenna becomes omnidirectional as shown in Fig. 2 (b) (1) in the XZ plane.

First earthing conductor 5 and parasitic antenna 6 provide with radiant element 3 coplanes.By from the control signal of control circuit 10 output with switch 7 short circuits, thereby first earthing conductor 5 is conducted mutually with parasitic antenna 6.Also promptly, radiant element 3 as shown in Fig. 2 (a) (2) by as described in earthing conductor center on.As shown in Fig. 2 (b) (2), described antenna shows wherein that greatest irradiation appears at ± directivity on the Z direction.Further, when switch 7 being opened circuit by described control signal from control circuit 10 outputs; Also promptly, when as shown in Fig. 2 (a) (3) will around the part of radiant element 3 from as described in earthing conductor when separating, parasitic antenna 6 is taken on guider.As shown in Fig. 2 (b) (3), described antenna becomes unidirectional and shows greatest irradiation on+directions X.Also promptly, can be by short circuit or disconnect 7 and with about 90 ° of directivity of switching described antennas.

Yet as shown in Fig. 2 (a) (2), according to top configuration, when switch 7 kept by short circuit, described antenna became two-way, and showed the greatest irradiation on ± Z direction.When on the dielectric base plate 2 that only conductive pattern of (2) is placed described wireless terminal, towards described human body-radiation field also appears on the Z direction (also promptly, the direction opposite with the back side), this causes the deterioration of SAR conversely.Therefore, as shown in fig. 1, on the surface of the reverse side of radiant element 3, dielectric base plate 2, provide second earthing conductor 8.Keep by under the situation of short circuit at switch 7, towards described human body-radiation field on the Z direction is blocked, thereby be implemented in+one-way on the Z direction.The influence of the described arrangement of second earthing conductor 8 to the directivity switching of described antenna will be described in detail.

Among Fig. 1 (b), the interval between radiant element on the X-direction 3 and the parasitic antenna 6 is taken as D.Interval between the end portion 9 of the radiant element on the X-direction 3 and second earthing conductor 8 is taken as G.At this moment, the sectional view that obtains when the G=D from the described directivity switched antenna of the first embodiment of the present invention shown in Fig. 3 (a) as can be seen, when making described interval G equal or being longer than described interval D a little, when short circuit or disconnect 7, obtain the basic directivity that equates.

Fig. 3 (b) switches the obtained directivity of described switch when the G=D according to the described directivity switched antenna of the first embodiment of the present invention.By reference Fig. 3 (b), can find the directivity that action fails to switch described antenna of stirring of switch 7.This shows, as the result who second earthing conductor 8 is provided at below the parasitic antenna 6, parasitic antenna 6 is not as guider work.

The described directional switch antenna device of the first embodiment of the present invention shown in Fig. 4 (a) supposition at interval G be that second earthing conductor 8 is not positioned at below the radiant element 3 under the situation of the sectional view that o'clock obtains of negative value G≤0.Thereby, keep under the state of short circuit the same edge-Z direction intense radiation of electromagnetic wave at switch 7.Fig. 4 (b) illustrates the view of the described directivity switched antenna of the first embodiment of the present invention in the obtained directivity of the G≤0 described switch of some short circuit, and be illustrated in respectively G at interval for-2mm ,-the obtained directivity of short switch 7 when 1mm and 0mm.According to Fig. 4 (b), when interval G adopted value-2mm and-during 1mm, be appreciated that the electromagnetic wave edge-Z direction radiation equally that has with the essentially identical intensity of electromagnetic wave of edge+Z direction emission.When interval G is 0mm, be appreciated that with edge+Z direction radiation emitted field to compare that edge-Z direction radiation emitted field is suppressed about 5dB.

Under the situation of the sectional view that the described directional switch antenna device of the first embodiment of the present invention shown in Fig. 5 (a) obtains during at G=D/4, the end portion 9 of second earthing conductor 8 is arranged at along X-direction, between radiant element 3 and parasitic antenna 6; Also promptly, G satisfies relational expression 0≤G＜D at interval, and toggle switch 7 whereby, thereby realizes the directivity handover operation of expectation.As example, Fig. 5 (b) illustrate described directivity switched antenna when short circuit and disconnect 7 on frequency F obtained directivity, wherein satisfy condition: with length is that the radiant element 3 of L=0.7 λ is arranged in and has dielectric constant 3.8 and thickness " t " is on the dielectric base plate 2 of 0.03 λ; With length is that the parasitic antenna 6 of Ld=0.6 λ is arranged in and separates radiant element 3 distances and be the position of D=0.13 λ; And the interval G along X-direction adopts D/4 between the end portion of the radiant element 3 and second earthing conductor 8.According to Fig. 5 (b), be appreciated that by the change action of switch 7 directivity of described antenna with about 90 ° of changes.

In order to impel parasitic antenna 6, optimally the interval D between radiant element 3 and the parasitic antenna 6 is increased to the value of about 0.25 λ as guider work.But, can become bigger as the size of the described antenna of result that increases interval D.Thereby, under the situation of present embodiment, can interval D be increased to the value of about 0.25 λ and switching direction.The length of adjusting parasitic antenna 6 makes it take on guider when switch 7 opens circuit.Yet for example,, configuration parasitic antenna 6 also can change directivity by its variable-length by the reactive component of adjusting described guider as long as making.The method that is used to change the length of parasitic antenna 6 can comprise: parasitic antenna 6 is divided into a plurality of conductor pieces; Between described conductor piece, place switch 7; And change the length of parasitic antenna 6 by short circuit/disconnect 7, and perhaps can comprise the variable-capacitance element that adds such as variable capacitance diodes to parasitic antenna 6, thus the length of regulating described parasitic antenna according to control voltage incoming call.

Although Fig. 5 (b) switches the obtained directivity of described switch when being illustrated in interval G=D/4, Fig. 6 to 8 illustrates another example, and wherein G satisfies relational expression 0≤G＜D at interval.Fig. 6 (a) is the sectional view that obtains when the G=D/2 according to the described directivity switched antenna of the first embodiment of the present invention, and Fig. 6 (b) illustrates according to the described directivity switched antenna of the first embodiment of the present invention and switches the obtained directivity of described switch when the G=D/2.Fig. 7 (a) is the sectional view that obtains when the G=3/4 * D according to the described directivity switched antenna of the first embodiment of the present invention, and Fig. 7 (b) illustrates according to the described directivity switched antenna of the first embodiment of the present invention and switches the obtained directivity of described switch when the G=3/4 * D.Fig. 8 (a) is the sectional view that obtains when the G=19/20 * D according to the described directivity switched antenna of the first embodiment of the present invention, and Fig. 8 (b) illustrates according to the described directivity switched antenna of the first embodiment of the present invention and switches the obtained directivity of described switch when the G=19/20 * D.That is adopted among the numerical value except the interval G shown in Fig. 6 to 8 and Fig. 5 (a) is the same.According to Fig. 6 (b), 7 (b) and 8 (b), can confirm by the stirring action of switch 7 and with about 90 ° of switching directions.

Fig. 9 illustrates according to the described directional switch antenna device of the first embodiment of the present invention and switches the obtained directivity handoff angle of described switch in-D/2≤G＜D scope.Trunnion axis is represented the G/D ratio, and vertical axis is represented the directivity handoff angle, and described directivity handoff angle points out to obtain between transfer period at described switch the handoff angle of greatest irradiation direction.Shown in Fig. 5 to 8, Fig. 9 illustrates that described directivity handoff angle is near about 90 ° when G/D from 0 to 1 changes, and as long as change just can switching direction for G/D from 0 to 1.Also confirm simultaneously, when G/D near 1, even toggle switch 7 can not switch the directivity of described antenna.This explanation, when placing second earthing conductor 8 near the bottom part of parasitic antenna 6, parasitic antenna 6 is no longer taken on guider.And, even G/D near 0, described directivity handoff angle is still near 90 °.At this moment, as shown in Fig. 4 (b) at G=0mm the time short circuit as described in switch obtained as described in directivity indicated, compare with the radiation field of edge+Z direction, described radiation field has been suppressed.But described radiation field is equally also to the emission of-Z direction.Therefore optimum is, G is arranged in the scope of 0＜G＜D at interval, gets rid of described interval and reaches 0 or the scope of D.This figure shows, when not considering the emission of described radiation field edge-Z direction, and can be by coming switching direction in the scope with described being disposed on-D/4＜G＜D.

With described user and the relation of the position between the described wireless terminal that is described in detail in during the voice conversation and obtains during the data communication.Figure 10 is illustrated in described wireless terminal and the relation of the example location between the described user that obtains during the voice conversation.Figure 11 is illustrated in described wireless terminal and the relation of the example location between the described user that obtains during the data communication.When carrying out voice conversation, suppose the position relation that between user 11 and wireless terminal 12, exists as shown in Figure 10.When carrying out data communication, suppose the position relation that between user 11 and wireless terminal 12, exists as shown in Figure 11.

During voice conversation, user 11 be placed on when using wireless terminals 12 described user's head side near.During data communication, user 11 is general by using functional unit 14 executable operations, confirms to be apparent in the message on the display unit 13 of wireless terminal 12 simultaneously.So, as shown in Figure 12, during voice conversation, preferably the directivity of the described antenna that provides in the wireless terminal 12 is switched, make greatest irradiation direction that the directivity of described antenna obtains towards the back side orientation of wireless terminal 12 (also promptly, opposite direction) with the display surface of display unit 13.In addition, during data communication, preferably directivity is switched, made greatest irradiation direction that the directivity of described antenna obtains towards the top-direction of wireless terminal 12 (also promptly, with respect to the horizontal direction of the display surface of display unit 13 and be the upper direction of shown message).

Because wireless terminal 12 has such directivity handoff functionality, the radiation field that is derived from described antenna is towards user 11, this so that cause the improvement of SAR and to strengthening the expectation of antenna gain.Therefore, directivity switched antenna 1 is placed wireless terminal 12, make the described top-direction among Figure 12 is assigned to directions X, and make described back side direction be assigned to the Z direction, thereby can during voice conversation and data communication, obtain the directivity characteristic of expectation.

As above, first earthing conductor 5 and parasitic antenna 6 are provided at around the radiant element 3 that places on the dielectric base plate 2 and with its coplane.Switch 7 is placed between first earthing conductor 5 and the parasitic antenna 6.Under radiant element 3, provide second earthing conductor 8, and dielectric base plate 2 is between between it.In such structure, the end portion 9 of second earthing conductor 8 is between radiant element 3 and parasitic antenna 6.Further, by use control circuit 10 toggle switches 7, thereby with about 90 ° of directivity of switching described antennas.Thereby, possess such advantage, can realize coming the antenna assembly of switching direction according to the use pattern of wireless terminal.

Further, by using the described directivity switched antenna of describing according to described embodiment to come configuration of wireless terminal.As a result, switch the directivity of described antenna, thereby strengthen the performance of described wireless terminal according to the use pattern of described wireless terminal.So, wireless communication system very reliably can be provided.

Present embodiment had been described on dielectric base plate 2 and had been formed radiant element 3 with conductive pattern.But radiant element 3 also can be by forming such as the linear conductor of electric wire or by compressing tablet.

Present embodiment has been described overshoot element 3 and has been formed the wire dipole.But radiant element 3 is not limited to the wire dipole, also can be formed for example meander line.

Present embodiment had been described supposition radiant element 3, first earthing conductor 5, parasitic antenna 6 and second earthing conductor 8 had been formed on the dielectric base plate 2.But, always do not need to use described dielectric base plate.For example, radiant element 3, parasitic antenna 6, first earthing conductor 5 and second earthing conductor 8 and so on are formed by compressing tablet, and can fix described element by blowing agent.

Present embodiment described with the face of the dielectric base plate 2 of dielectric base plate 2 surface opposite that form radiant element 3 on form second earthing conductor 8 with conductive pattern.For example, can described second earthing conductor be provided on the dielectric base plate 2, leave dielectric base plate 2 and give on the shell of wireless terminal 12 of set a distance but it is provided at.Bring following advantage by such configuration: can fully guarantee the interval between the radiant element 3 and second earthing conductor 8, and can easily realize the coupling of described antenna.

The present invention does not specifically describe the configuration of switch 7.But, can use diode switch, FET switch, mems switch and so on.

(second embodiment)

Figure 13 is the schematic diagram of directivity switched antenna according to a second embodiment of the present invention.Figure 13 (a) is a perspective view, and Figure 13 (b) is the sectional view that obtains along the line A-A ' shown in Figure 13 (a).In Figure 13, directional switch antenna device comprises auxiliary element 15.In others, second embodiment is identical with first embodiment, thereby omits its explanation.

To the operation of according to a second embodiment of the present invention described directional switch antenna device be described now.The basic operation of this antenna assembly is with described identical according to first embodiment, thereby omits its explanation.Provide auxiliary element 15 at the two ends of parasitic antenna 6, and switch 7 is between parasitic antenna 6 and auxiliary element 15.About auxiliary element 15, the parasitic antenna of obtaining when being arranged on short switch 76 and the total length of auxiliary element 15 make parasitic antenna 6 take on the reflector with respect to radiant element 3.By such configuration, when disconnect 7, parasitic antenna 6 is taken on guider, and directivity edge+directions X orientation.When short switch 7, parasitic antenna 6 is taken on reflector, and directivity edge+Z direction orientation.Thereby, bring when cover with earthing conductor radiant element 3 around the time the described advantage that obtains.

As above, auxiliary element 15 is placed the two ends of parasitic antenna 6.Thereby utilize control circuit 10 toggle switches 7 that parasitic antenna 6 is switched between described guider and described reflector, and then can be with about 90 ° of directivity of switching described antenna.Thereby, bring such advantage, can realize coming the antenna assembly of switching direction according to the use pattern.

In addition, by using the described directional switch antenna device of describing according to present embodiment to come configuration of wireless terminal.So, switch the directivity of described antenna according to described use pattern, thereby strengthen the performance of described wireless terminal.Therefore, can provide wireless communication system very reliably.

Present embodiment described with first earthing conductor 5 place radiant element 3-directions X.As shown in Figure 14, even use reflector 16 also can bring same advantage in the position of first earthing conductor 5.

Present embodiment had been described supposition radiant element 3, first earthing conductor 5, parasitic antenna 6, second earthing conductor 8 and auxiliary element 15 had been formed on the dielectric base plate 2.But, always do not need to use described dielectric base plate.For example, radiant element 3, parasitic antenna 6,

earthing conductor

5,8, auxiliary element 15 and so on are formed by compressing tablet, and can fix described element by blowing agent.

(the 3rd embodiment)

Figure 15 is the schematic diagram of the directivity switched antenna of a third embodiment in accordance with the invention.Figure 15 (a) is a perspective view, and Figure 15 (b) is the sectional view that obtains along the line A-A ' shown in Figure 15 (a).Among Figure 15, directional switch antenna device 1 comprises auxiliary element 15, parasitic antenna 17, switch 18 and the end portion 19 of second earthing conductor 6 on the part of parasitic antenna 17.In others, present embodiment is identical with first embodiment, thereby omits its explanation.

To the operation of the directional switch antenna device 1 of a third embodiment in accordance with the invention be described now.The basic operation of this antenna assembly is with described identical according to first embodiment, thereby omits its explanation.Provide auxiliary element 15 at the two ends of parasitic antenna 6, and switch 7 is between parasitic antenna 6 and auxiliary element 15.About auxiliary element 15, the parasitic antenna of obtaining when being arranged on short switch 76 and the total length of auxiliary element 15 make parasitic antenna 6 take on the reflector with respect to radiant element 3.

Replace first earthing conductor 5, the parasitic antenna 17 with parasitic antenna 6 equal in length is provided.Provide auxiliary element 15 at the two ends of parasitic antenna 17 equally.Switch 18 is between parasitic antenna 17 and auxiliary element 15.Make interval between radiant element 3 and the parasitic antenna 17 equal interval between radiant element 3 and the parasitic antenna 6.In addition, also make interval G between radiant element 3 and the end portion 19 (in second earthing conductor, 8 edge-X-directions towards on the part of parasitic antenna 17) equal interval G between radiant element 3 and the end portion 9 (in second earthing conductor, 8 edge+X-directions towards on the part of parasitic antenna 6).Especially, in comprising the YZ plane of radiant element 3, obtain symmetrical structure.

At this moment, utilize control circuit 10

control switchs

7,18, thus switching direction.The detailed description of this respect will be provided.Figure 16 illustrates the relation between the directivity of the short circuit of

switch

7,18/open circuit action and described antenna.When described

switch

7,18 during by short circuit,

parasitic antenna

6,17 is taken on reflector.Thereby the directivity of described antenna is oriented among Figure 11+the Z direction.

Then, when switch 7 short circuits and switch 18 when opening circuit, parasitic antenna 6 is taken on reflector, and parasitic antenna 17 is taken on guider.Thereby the directivity of described antenna is oriented among Figure 15-directions X.Then, open circuit when switch 7 and during switch 18 short circuits, make parasitic antenna 6 take on guider, and parasitic antenna 17 is taken on reflector.Thereby the directivity of described antenna is oriented among Figure 15+directions X.When

switch

7,18 all opened circuit,

parasitic antenna

6,17 was taken on guider.About the directivity of described antenna, described greatest irradiation direction is+the Z direction.But, obtain omnidirectional basically characteristic.

As mentioned above, auxiliary element 15 is placed each two ends of parasitic antenna 6,17.Further, utilize control circuit 10 control

parasitic antennas

6,17 to make, change action by

switch

7,18, parasitic antenna 6 is switched to described guider and parasitic antenna 17 is switched to described reflector, thus can ± directions X and ± the Z direction switches the directivity of described antenna with 90 ° of intervals.Bring following advantage: can realize such antenna assembly, it is according to the use pattern of described wireless terminal, even when described wireless terminal is being placed during the data communication for example when making described radiation direction towards described user, also can select with towards described user's direction opposite ± directions X, thereby switching direction.

By using the described directivity switched antenna of describing in the present embodiment to come configuration of wireless terminal, can strengthen the performance of described wireless terminal by the directivity of switching described antenna according to the use pattern.Therefore, can provide wireless communication system very reliably.

Present embodiment had been described supposition radiant element 3,

parasitic antenna

6 and 17, second earthing conductor 8 and auxiliary element 15 had been formed on the dielectric base plate 2.But, always do not need to use described dielectric base plate.For example, radiant element 3,

parasitic antenna

6 and 17, earthing conductor 8, auxiliary element 15 and so on are formed by compressing tablet, and can fix described element by blowing agent.

Present embodiment does not specifically describe the configuration of switch 7.But, can use diode switch, FET switch, mems switch and so on.

(the 4th embodiment)

Figure 17 is the schematic diagram of the directivity switched antenna of a fourth embodiment in accordance with the invention.Figure 17 (a) is a perspective view, and Figure 17 (b) is the sectional view that obtains along the line A-A ' shown in Figure 17 (a).Among Figure 17, directional switch antenna device 1 comprises the radiant element 20 with foldable structure.In others, present embodiment is identical with first embodiment, thereby omits its explanation.

To the operation of the described directional switch antenna device of a fourth embodiment in accordance with the invention be described now.For example, among Fig. 1, the radiant element 3 and second earthing conductor 8 are separated by the thickness of dielectric base plate 2 " t " each other; Also promptly, 0.008 λ.When near the limit that earthing conductor 8 is placed radiant element 3 as mentioned above, the input impedance of radiant element 3 becomes than much smaller under near the situation the limit that earthing conductor 8 is not placed radiant element 3.

Under the situation of radiant element 20,, can increase the impedance of described radiant element by the radiant element 3 with foldable structure is provided.For example, the input impedance of the twofold dipole antenna shown in Figure 18 (b) is four times of input impedance of the common dipole antenna shown in Figure 18 (a).The input impedance of three folded dipoles shown in Figure 18 (c) is octuple of the input impedance of described common dipole antenna.As the result who uses radiant element 20 as shown in figure 17 with foldable structure, can be increased in the input impedance of the described antenna that distributing point 4 obtains, this microstrip line or coaxial line based on 50 Ω easy to use mates described antenna.

As above, provide radiant element 20, and utilize control circuit 10 toggle switches 7 with foldable structure.As a result, bring following advantage: can realize such antenna assembly, it increases the input impedance of described antenna, thereby helps coupling when the directivity of switching described antennas with about 90 °, and according to the use mode switch directivity of described wireless terminal.

In addition, use the described directional switch antenna device of describing according to present embodiment to come configuration of wireless terminal.Can switch the directivity of described antenna according to the use pattern, thereby strengthen the performance of described wireless terminal.Therefore, can provide wireless communication system very reliably.

Present embodiment had been described on dielectric base plate 2 and had been formed radiant element 20 with conductive pattern.But radiant element 20 also can be by forming such as the linear conductor of electric wire or by compressing tablet.

Present embodiment had been described supposition radiant element 20, first earthing conductor 5, parasitic antenna 6 and second earthing conductor 8 had been formed on the dielectric base plate 2.But, always do not need to use described dielectric base plate.For example, radiant element 20, parasitic antenna 6,

earthing conductor

5,8 and so on are formed by compressing tablet, and can fix described element by blowing agent.

Present embodiment described with the face of the dielectric base plate 2 of dielectric base plate 2 surface opposite that form radiant element 20 on form second earthing conductor 8 with conductive pattern.For example, can described second earthing conductor be provided on the dielectric base plate 2, leave dielectric base plate 2 and give on the shell of wireless terminal 12 of set a distance but it is provided at.Bring following advantage by such configuration: can fully guarantee the interval between the radiant element 3 and second earthing conductor 8, and can easily realize the coupling of described antenna.

In the present embodiment, the two-dimensional structure that

radiant element

3,20 is formed in the XY plane.But

radiant element

3,20 is not limited to this structure.For example as shown in Figure 19 (a) and 19 (b), the structure that the end that

radiant element

3,20 forms wherein said radiant element can be folded.By such foldable structure, can shorten described antenna length, and can be with described antenna microminiaturization.

Use description to make the method for the antenna that in the YZ plane, folds as shown in Figure 19 (a) and 19 (b) now.As shown in Figure 20, the method for making antenna in the simplest mode is to handle by compressing tablet to make antenna.Processing can intactly form and form the whole of radiant element by compressing tablet: bottom conductor 21, folded part 22 and upper conductor 23.Perhaps can select, can on dielectric base plate 2, form bottom conductor 21 in advance, form and only have folded part 22 and upper conductor 23 to handle by compressing tablet with conductive pattern.

As shown in Figure 21, except handling, compressing tablet can also adopt another kind of manufacture method; For example, the new dielectric base plate 24 of placing on dielectric base plate 2; Use flat board (planer) conductive pattern between

dielectric base plate

2,24 to form bottom conductor 21; Form upper conductor 23 with dielectric base plate 24 towards the lip-deep conductive pattern of the surperficial reverse side of dielectric base plate 2; With formation folded parts 22 such as the through holes that passes dielectric base plate 24; And bottom conductor 21 is electrically connected to upper conductor 23.

By adopting such configuration, can make described directional switch antenna device with multilager base plate.As shown in Figure 22, each of bottom conductor 21, folded part 22 and upper conductor 23 can form with the pattern on the electrolyte blocks of being made by the high dielectric material such as pottery 25.By this configuration, can be to a great extent with described antenna assembly microminiaturization.Further, on electrolyte blocks 25, form parasitic antenna 6 and earthing conductor 5, thereby can make dielectric antenna with directivity handoff functionality with pattern.

(the 5th embodiment)

Figure 23 is the schematic diagram of wireless terminal according to a fifth embodiment of the invention.Among Figure 23, wireless terminal 12 comprises transceiver unit 26, control assembly 27 and the antenna directivity switching part 28 that is set to the frequency range of carrying out data communication and voice conversation.

To the operation according to the described wireless terminal of present embodiment of the present invention be described now.For example, when at the described wireless terminal of indoor use, owing to the reason such as the obstacle of wall is assumed to multi-path environment.Under such situation, described antenna can be by the described multi-path environment of diversity reception operation reply.Common diversity reception operation is to realize by place a plurality of antennas in the mode of spatial separation.But using a plurality of antennas to cause installing the required zone of described antenna increases, but also the zone of transducer (switch) that need be used to fix up an aerial wire, this antenna switching unit be used to select described a plurality of antenna wherein any one.

By using,, can realize the diversity reception of directivity the required zone maintenance of described antenna being installed in the required zone of installation individual antenna according to the described directivity switched antenna 1 of first to fourth embodiment.This point is described in detail.

Among Figure 23, wireless terminal 12 is formed by directivity switched antenna 1, transceiver unit 26, control assembly 27 and antenna directivity switching part 28.Utilize such configuration, receiving operating period, the high-frequency signal that is received by directivity switched antenna 1 experience frequency inverted and demodulation in transceiver unit 26, changes and the signal of demodulation is sent to control assembly 27 and institute is like this.At this moment, control assembly 27 monitors the increase (result of the described directivity of having switched as directivity switched antenna 1) of the power that receives, and transmit control signal 29 to antenna directivity switching part 28, so that obtain the directivity of the described antenna that reaches maximal received power thereon.Based on the control signal 29 by control assembly 27 outputs, antenna directivity switching part 28 determines to reach the directivity of high reception sensitivity thereon; And 30 directivity with switching direction switched antenna 1 that transmit control signal, so that obtain high reception sensitivity.By control signal 30, switch described directivity switched antenna 1 so that the directivity that obtains expecting.Simultaneously, during transmit operation, the signal that is sent by control assembly 27 experiences modulation and frequency inverted in transceiver unit 26, and sends the signal of described modulation like this and conversion from directivity switched antenna 1.At this moment, use and to receive operating period selected directivity as the directivity of directivity switched antenna 1.

As above, described wireless terminal is formed by directivity switched antenna 1, transceiver unit 26, control assembly 27 and antenna directivity switching part 28.Can carry out diversity reception by individual antenna, thereby bring such advantage, can realize compactness, high performance wireless terminal.

The present invention describes, during transmit operation, with receiving the identical directivity user tropism switched antenna 1 that operating period adopts.But the present invention is not limited to this embodiment.Receiving operating period, carrying out diversity reception by user tropism's switched antenna 1.During sending, can be arranged so that the radiation field that is derived from described directivity switched antenna is towards user's 11 propagation of using wireless terminal 12.For example, can adopt such configuration: the back side direction that during sending, the directivity emission maximum direction of directivity switched antenna 1 is fixed on wireless terminal 12; And during data communication, when sending, the directivity emission maximum direction of directivity switched antenna 1 is fixed on the top-direction of wireless terminal 12.

Present embodiment has been described the wireless terminal 12 that uses according to the described directivity switched antenna 1 of first to fourth embodiment.But the present invention is not limited to described embodiment.Can use the antenna assembly of any configuration, as long as can in top-direction (also be with about 90 ° with respect to wireless terminal 12, with respect to the horizontal direction of the display surface of display unit 13, and be the direction that makes progress about the message that shows) with back side direction (direction opposite) with the display surface of display unit 13 between the directivity of the described antenna of switching.

(the 6th embodiment)

Figure 24 is the schematic diagram of directivity switched antenna according to a sixth embodiment of the invention.Figure 24 (a) is a perspective view, and Figure 24 (b) is the sectional view that obtains along the line A-A ' shown in Figure 24 (a).Among Figure 24, directional switch antenna device comprises: directivity switched antenna 201; Thickness is the dielectric base plate 202 of " t "; The length that is formed by the linear conductor that is provided on the dielectric base plate 202 is the radiant element 203 of L; Distributing point 204; Earthing conductor 205 is provided at and provides on the surface of dielectric base plate 202 of surface opposite of dielectric base plate 202 of radiant element 203; Length is that Lm, width are first metallic conductor 206 of Wm, with earthing conductor 205 coplanes and with earthing conductor 205 electric insulations, be provided on the dielectric base plate 202, and is basically parallel to radiant element 203; Switch 207a is between the earthing conductor 205 and first metallic conductor 206; The end portion 208 of earthing conductor 205 on the part of first metallic conductor 206; And the control circuit 209 that is used for the short circuit of control switch 207a and opens circuit.

To suppose that radiant element 203, earthing conductor 205 and first metallic conductor 206 are formed on the dielectric base plate 2 by conductive pattern and are described.These elements are formed on bring following advantage on the dielectric base plate 2: can be by the wavelength decreases effect of bringing by dielectric constant with described antenna assembly microminiaturization, that described in addition antenna assembly becomes is cheap, be easy to large-scale production and antenna performance is stable.

To the operation of according to a sixth embodiment of the invention described directional switch antenna device be described now.Be radiated in the air from radiant element 203 from the high-frequency signal of distributing point 204 feeds.Among the present invention, radiant element 203 is described to have the dipole configuration.Figure 25 illustrates the principle of directivity handover operation of the present invention.

As shown in Figure 25 (a) (1), in the time of under earthing conductor 205 is present in radiant element 203, the directivity of described antenna becomes unidirectional as shown in Figure 25 (b) (1) and shows the greatest irradiation direction in+Z direction.Then, as shown in Figure 25 (b) (2), when earthing conductor 205 be not present in respect to radiant element 203+zone of directions X in the time, the directivity of described antenna becomes unidirectional and shows the greatest irradiation direction at+directions X.As shown in Figure 25 (a) (3), even first metallic conductor 206 is arranged in respect to radiant element 203+directions X is during simultaneously with earthing conductor 205 electric insulations, also can be by length L m and the width W m that suitably adjusts first metallic conductor 206, make the directivity of described antenna become unidirectional and show the greatest irradiation direction that the situation with Figure 25 (b) (2) is identical substantially at+directions X.

When by switch 207a with earthing conductor 205 with first metallic conductor 206 couples together and during short switch 207a, first metallic conductor 206 is as earthing conductor 205 work, thereby equally with the situation of Figure 25 (b) (1) shows wherein that the greatest irradiation direction appears at+directivity on the Z direction.Further, when switch 207a was opened circuit, first metallic conductor 206 was as the guider work with respect to radiant element 203.As shown in Figure 25 (b) (3), described antenna shows wherein that the greatest irradiation direction appears at+directivity on the directions X.Therefore, can be by the change action of switch 207a with about 90 ° of directivity of switching described antennas.In order to switch the directivity of described antenna, the relative position relation between relative position relation between the size of the size of earthing conductor 205, first metallic conductor 206, radiant element 203 and the earthing conductor 205 and radiant element 203 and first metallic conductor 206 becomes very important.The detailed description of this respect will be provided.

From the example arrangement of the described directivity switched antenna according to a sixth embodiment of the invention shown in Figure 26 as can be seen, the length of supposing radiant element 203 is L; Suppose that first metallic conductor 206 is Lm in the length of Y direction; Suppose that first metallic conductor 206 is Wm at the width of directions X; Suppose and be spaced apart D (+directions X for just) between radiant element 203 and the end portion 208 (at earthing conductor 205 along directions X towards on the part of first metallic conductor 206); And be spaced apart sw between supposition earthing conductor 205 and first metallic conductor 206.At this moment, the interval D between radiant element 203 and end portion 208 (at earthing conductor 205 along directions X towards on the part of first metallic conductor 206) just is or under for negative situation, the operation of described antenna assembly is different.To describe each situation now.

At first, consider that interval D is positive situation.As shown in Figure 26, earthing conductor 205 is present under the radiant element 203.Thereby as short switch 207a and then when making first metallic conductor 206 become earthing conductor, described antenna becomes unidirectional, thereby shows the greatest irradiation direction with the form of not change in+Z direction.Simultaneously, in order the greatest irradiation direction of described antenna being oriented in+directions X when described earthing conductor disconnects, Lm to be set to make the metallic conductor 206 of winning as guider work with respect to radiant element 203 at disconnect 207a and then with first metallic conductor 206.

Figure 27 illustrates the directivity of the described directivity switched antenna of the sixth embodiment of the present invention.Figure 27 (a) is the view of the directivity that obtains when being illustrated in toggle switch 207a, wherein provides L=16.5mm the radiant element 203 of (0.54 λ) having on the dielectric base plate 202 that dielectric constant 3.8, thickness are t=0.5mm (0.02 λ); Interval D is 2mm (0.06 λ); The length L m of first metallic conductor 206 is 19mm (0.62 λ); The width W m of first metallic conductor 206 is 2mm (0.06 λ); And the interval sw between the earthing conductor 205 and first metallic conductor 206 is 1mm (0.03 λ).

Further, Figure 27 (b) is the view of the directivity that obtains when being illustrated in disconnect 207a, and wherein the length L m of first metallic conductor 206 in Shang Mian the parameter is set to 13mm (0.42 λ) and 21mm (0.68 λ).According to Figure 27 (a), when the length L m of first metallic conductor 206 is 19mm, by the change action of switch 207a with about 90 ° of directivity of switching described antennas.Be appreciated that can make described first metallic conductor take on guider by the length that first metallic conductor 206 is set comes switching direction.When the length L m of first metallic conductor 206 as shown in Figure 27 (b) was set to 13mm and 21mm, the greatest irradiation direction that can guarantee described antenna during switch 207a opens circuit was not towards+directions X.

Especially, when the length L m of first metallic conductor 206 was 13mm, this length was too short so that be not enough to allow described first metallic conductor as guider work.Otherwise, when the length L m of first metallic conductor 206 is 21mm, be appreciated that first metallic conductor 206 takes on the radiation on reflector and the inhibition+directions X.This shows, when using first metallic conductor 206 as guider, must be provided with its length is fallen in the scope of about 0.42 λ to 0.68 λ.

Then, consider that interval D is negative situation.The example arrangement of described directivity switched antenna according to a sixth embodiment of the invention is pointed as shown in Figure 28, and earthing conductor 205 is not present under the radiant element 203.For the greatest irradiation direction of described antenna being oriented in+the Z direction when the short switch 207a, must adopt first metallic conductor 206 wherein to be present in configuration under the radiant element 203.Also promptly, make the interval sw between the earthing conductor 205 and first metallic conductor 206 and first metallic conductor 206 width W m's and greater than interval D, thereby first metallic conductor 206 can be placed under the radiant element 203.

Figure 29 illustrates the directivity of the described directivity switched antenna of the sixth embodiment of the present invention.Figure 29 (a) is the view of the directivity that obtains when being illustrated in toggle switch 207a, wherein provides L=16.5mm the radiant element 203 of (0.54 λ) having on the dielectric base plate 202 that dielectric constant 3.8, thickness are t=0.5mm (0.02 λ); Interval D is-2mm (0.06 λ); The length L m of first metallic conductor 206 is 19mm (0.62 λ); The width W m of first metallic conductor 206 is 4mm (0.12 λ); And the interval sw between the earthing conductor 205 and first metallic conductor 206 is 1mm (0.03 λ).Further, Figure 29 (b) is the view of the directivity that obtains when being illustrated in disconnect 207a, and wherein the length L m of first metallic conductor 206 in Shang Mian the parameter is set to 10mm (0.32 λ) and is shorter than the length L of radiant element 203.

According to Figure 29 (a), when the length L m of first metallic conductor 206 is 19mm, be appreciated that by the change action of switch 207a with about 90 ° of directivity of switching described antennas.Simultaneously, as shown in Figure 29 (b), when the length L m of first metallic conductor 206 is 10mm and than radiant element 203 in short-term, the greatest irradiation direction that can guarantee described antenna during switch 207a short circuit is not towards+Z direction.Especially, when the length L m of first metallic conductor 206 than the length L of radiant element 203 in short-term, be appreciated that first metallic conductor 206 is not enough to as earthing conductor work during switch 207a short circuit.Therefore, optimally the length L than radiant element 203 is long for the length L m of first metallic conductor 206.

Described user and the relation of the position between the described wireless terminal that obtains during voice conversation and the data communication will be described in detail in.Figure 30 is illustrated in described wireless terminal and the relation of the example location between the described user that obtains during the voice conversation.Figure 31 is illustrated in described wireless terminal and the relation of the example location between the described user that obtains during the data communication.When carrying out voice conversation, suppose the position relation that between user 210 and wireless terminal 211, exists as shown in Figure 30.When carrying out data communication, suppose the position relation that between user 210 and wireless terminal 211, exists as shown in Figure 31.

During voice conversation, user 210 be placed on when using wireless terminals 211 described user's head side near.During data communication, user 210 is general by using functional unit 213 executable operations, confirms to be apparent in the message on the display unit 212 of wireless terminal 211 simultaneously.So, as shown in Figure 32, during voice conversation, preferably the directivity of the described antenna that provides in the wireless terminal 211 is switched, make greatest irradiation direction that the directivity of described antenna obtains towards the back side orientation of wireless terminal 211 (also promptly, opposite direction) with the display surface of display unit 212.In addition, during data communication, also preferably directivity is switched, made greatest irradiation direction that the directivity of described antenna obtains towards the top-direction of wireless terminal 211 (also promptly, with respect to the horizontal direction of the display surface of display unit 212 and be the upper direction of shown message).

Because wireless terminal 211 has such directivity handoff functionality, the radiation field that is derived from described antenna is towards user 210, this so that cause the improvement of SAR and to strengthening the expectation of antenna gain.Therefore, directivity switched antenna 201 is placed wireless terminal 211, make the described top-direction among Figure 32 is assigned to directions X, and make described back side direction be assigned to the Z direction, thereby can during voice conversation and data communication, obtain the directivity characteristic of expectation.

As above, described directivity switched antenna comprises: the radiant element 203 that provides on dielectric base plate 202; Earthing conductor 205 is arranged in and provides on the surface of dielectric base plate 202 of surface opposite of dielectric base plate 202 of radiant element 203; First metallic conductor 206 with earthing conductor 205 coplanes, be provided on the dielectric base plate 202, is parallel to radiant element 203, and with earthing conductor 205 electric insulations; And switch 207a, between the earthing conductor 205 and first metallic conductor 206.Utilize control circuit 209 that switch 207a is switched between location of short circuit and off position, make it possible to about 90 ° of directivity of switching described antenna.Bring such advantage, can realize switching the antenna of its directivity according to the use pattern of described wireless terminal.

Present embodiment had been described on dielectric base plate 202 and had been formed radiant element 203 with conductive pattern.But radiant element 203 also can be by forming such as the linear conductor of electric wire or by compressing tablet.

Present embodiment has been described overshoot element 203 and has been formed the wire dipole.But radiant element 203 is not limited to the wire dipole, also can be formed for example meander line.

Present embodiment had been described supposition radiant element 203, earthing conductor 205 and first metallic conductor 206 had been formed on the dielectric base plate 202.But, always do not need to use described dielectric base plate 202.For example, radiant element 203, earthing conductor 205 and first metallic conductor 206 can be formed by compressing tablet, and can fix described element by blowing agent.

The length of first metallic conductor 206 is provided so that described first metallic conductor 206 is as guider work when switch 207a opens circuit.But, for example,, can change directivity by the reactive component of adjusting described guider equally as long as adopted the configuration that wherein can change the length of first metallic conductor 206.

The method that is used to change the length of first metallic conductor 206 can comprise: first metallic conductor 206 is divided into a plurality of conductor pieces along its longitudinal direction; Between described each conductor piece, place switch 207a; And short circuit/disconnect 207a and then change the length of described conductor piece.Perhaps, this method can comprise the variable-capacitance element that adds such as variable capacitance diode to first metallic conductor 206, and according to controlling the length that the voltage incoming call is regulated first metallic conductor 206.

In the present embodiment, with the face of the opposite dielectric base plate 202 on the surface of the dielectric base plate 202 that radiant element 205 is provided on form the earthing conductor 205 and first metallic conductor 206 with conductive pattern.But, for example, can the described earthing conductor 205 and first metallic conductor 206 be provided on the dielectric base plate 202, leave dielectric base plate 202 and give on the shell of wireless terminal 211 of set a distance but it is provided at.By adopting such configuration, can fully guarantee the interval between radiant element 205 and the earthing conductor 205, and bring such advantage, in the time of under earthing conductor 205 is present in radiant element 203, can easily realize the coupling of described antenna.

By utilizing the following fact, promptly cause the change of directivity during switch 207a short circuit by the width W m that changes first metallic conductor 206, can adjust by the short circuit of switch 207a and open circuit and the directivity handoff angle of the described antenna that switches.For example, the example arrangement of described directivity switched antenna according to a sixth embodiment of the invention as shown in Figure 33 is described, can adopt such configuration, first metallic conductor 206 is divided into a plurality of conductor pieces 214 with respect to X-direction, and described conductor piece is linked together by switch 207a.

(the 7th embodiment)

Figure 34 is the schematic diagram of directivity switched antenna according to a seventh embodiment of the invention.Among Figure 34, described directivity switched antenna comprises diode switch 215.The remainder of this configuration is identical with the 6th embodiment, thereby omits its explanation.

Below will the operation of according to a seventh embodiment of the invention described directivity switched antenna be described.Because the basic operation of this antenna is with described identical according to the 6th embodiment, thereby omit its explanation.As shown in Figure 34, earthing conductor 205 is linked to each other with first metallic conductor 206 in a plurality of positions by diode switch 215.

By such configuration, when diode switch 215 during by short circuit, first metallic conductor 206 is as earthing conductor 205 work, and the directivity edge+Z direction of described antenna is orientated.When diode switch 215 was opened circuit, first metallic conductor 206 was as the guider work with respect to radiant element 203, and the directivity edge+directions X of described antenna orientation.Can be by the change action of diode switch 215 with about 90 ° of directivity that change described antennas.Yet at this moment, described directivity characteristic is subjected to installing the influence of the position of diode switch 215.The detailed description of this respect will be provided.

Two diode switches 215 consider to be installed and it is placed at respectively ± the Y direction on apart from the situation of distributing point 204 for the position of d1, d2.If Figure 35 illustrates having on the dielectric base plate 202 that dielectric constant 3.8, thickness are t=0.5mm (0.02 λ) L=16.5mm is provided the radiant element 203 of (0.54 λ); First metallic conductor 206 has length L m=19mm (0.62 λ) and width W m=4mm (0.12 λ); And the interval sw between the earthing conductor 205 and first metallic conductor 206 is 1mm (0.03 λ), and the installation site of diode switch 215 is set to d1=d2=d and changes " d ", the view of the directivity that obtains during by short circuit when diode switch 215.

Among Figure 35, ref illustrates the state that earthing conductor 205 and first metallic conductor 206 are electrically connected in an ideal way each other fully.Work as d=2mm, directivity is edge+Z direction orientation not.Even, be appreciated that first metallic conductor 206 is as earthing conductor 205 work when diode switch 215 during by short circuit.But when with " d " when being increased to d=7mm, wherein the installation site of diode switch 215 arrives the position under each end of radiant element 203 basically, and directivity becomes basic and ref is equal to.Can guarantee to obtain the unidirectional characteristic that on+Z direction, shows the greatest irradiation direction.

The two ends of radiant element 203 are positioned at the zone that reaches maximum potential.By near this zone, earthing conductor 205 being electrically connected to first metallic conductor 206, be equal to the desirable state that is electrically connected fully basically.Thereby expectation is arranged on the installation site of diode switch 215 the following position of the described areas of high potential of radiant element 203.

As above, between the earthing conductor 205 and first metallic conductor 206, add two diode switches 215, and the installation site of diode switch 215 is arranged near the described areas of high potential of radiant element 203, thereby can be by short circuit and the described switch and of opening circuit with about 90 ° of directivity of switching described antennas.Therefore, bring such advantage, can realize switching the antenna of its directivity according to the use pattern of described wireless terminal.

Further, as by using the described directivity switched antenna of describing according to present embodiment to form the result of described wireless terminal, dispose described wireless terminal by using the described directivity switched antenna of describing according to described embodiment.Switch the directivity of described antenna according to the use pattern of described wireless terminal, thereby can strengthen the performance of described wireless terminal.So, wireless communication system very reliably can be provided.

Present embodiment had been described supposition radiant element 203, earthing conductor 205 and first metallic conductor 206 had been formed on the dielectric base plate 202.But, always do not need to use described dielectric base plate.For example, radiant element 203, earthing conductor 205 and first metallic conductor 206 etc. are formed by compressing tablet, and can fix described element by blowing agent.

Present embodiment described with the face of the opposite dielectric base plate 202 on the surface of the dielectric base plate 202 that forms radiant element 203 on form earthing conductor 205 with conductive pattern.For example, described earthing conductor 205 can be provided at and leave dielectric base plate 202 and give on the shell of wireless terminal 211 of set a distance.By adopting such configuration, bring following advantage, the interval between radiant element 203 and the earthing conductor 205 can be fully guaranteed, and under earthing conductor 205 is present in radiant element 203 time, the coupling of described antenna can be easily realized.

In the present embodiment, use diode switch 215 as switching device.But described switching device is not limited to diode switch.Also can select to use other switch or other commutation circuits such as switch such as FET switch or use MEMS technology.

Present embodiment had been described wherein two diode switches 215 and had been arranged at locational situation about the longitudinal direction symmetry of radiant element 203, but d1 can be arranged to different length with d2.Figure 36 (a) equals 2mm if d1 is shown, the directivity that obtains in the XY plane when d2 is set to 2mm and 7mm respectively.

From Figure 36 (a) as can be seen, can adjust directivity in the XY plane by changing distance between d1 and the d2.Further, though when one of them diode switch 215 by short circuit and another when being opened circuit, also can adjust the directivity in the XY plane.Figure 36 (b) is the view that the directivity in the XY plane of obtaining when among Figure 34 d1=d2=7mm being set is shown; When one of them diode switch 215 during by short circuit; And when another diode switch is opened circuit.According to Figure 36 (b), be appreciated that working as one of them diode switch 215 is opened circuit, thereby described electromagnetic field becomes asymmetric about the longitudinal direction of radiant element 203; And the greatest irradiation direction of directivity moves towards the X-direction in the XY plane.Can utilize these true directivity of adjusting three-dimensionally.

Present embodiment had been described the situation of using two diode switches 215.But the quantity of diode switch is not necessarily limited to two.Much less, can adopt the configuration that wherein between the earthing conductor 205 and first metallic conductor 206, adds two or more diode switches.Can control the directivity in the XY plane by the quantity of increase switch more accurately.

By changing the width W m of first metallic conductor 206, can adjust by short circuit or open circuit and the directivity handoff angle of the described antenna that obtains when switching described diode switch 215.For example, can adopt such configuration, first metallic conductor 206 is divided into a plurality of conductor pieces 214 with respect to X-direction, and described conductor piece be linked together by switch 207a.

(the 8th embodiment)

Figure 37 is the schematic diagram according to the directivity switched antenna of the eighth embodiment of the present invention.Figure 37 (a) is a perspective view, and Figure 37 (b) is the sectional view that obtains along the line A-A ' shown in Figure 37 (a).Among Figure 37, second metallic conductor 127 is placed on the dielectric base plate 202 with earthing conductor 205 coplanes.Adopt length L m and width W m to form second metallic conductor 127 and with itself and earthing conductor 205 electric insulations, make described second metallic conductor be parallel to radiant element 203 and also with first metallic conductor 206 about the placement of Y-axis symmetry.Second metallic conductor 127 comprises switch 207b, its between second metallic conductor 127 and earthing conductor 205 between the end portion 128 of second metallic conductor 127.In others, the present invention is identical with the 6th embodiment, thereby for omitting its explanation for purpose of brevity.

Below will the operation according to the described directional switch antenna device of the eighth embodiment of the present invention be described.Because described basic operation is with described identical according to first embodiment, thereby omit its explanation.Arrange second metallic conductor 127 with respect to earthing conductor 205, and with described first metallic conductor about the Y-axis symmetry.

At this moment, utilize control circuit 209

control switch

207a, 207b, thus switching direction.The detailed description of this respect will be provided.

Figure 38 illustrates the relation between the directivity of the short circuit/open-circuit operation of

switch

207a, 207b and described

antenna.As switch

207a, 207b during all by short circuit, first metallic conductor 206 and second metallic conductor 127 are formed the part of earthing conductors 205.Thereby the directivity of described antenna is oriented among Figure 37+the Z direction.Then, when switch 207b short circuit and switch 207a when opening circuit, first metallic conductor 206 is taken on guider, and second metallic conductor 127 is as the part work of earthing conductor 205.Thereby the directivity of described antenna is oriented among Figure 37+directions X.

When switch 207a short circuit and switch 207b when opening circuit, first metallic conductor 206 is formed the part of earthing conductors 205, and second metallic conductor 127 is as guider work.Thereby the directivity of described antenna is oriented among Figure 37-directions X.When

switch

207a, 207b all opened circuit, metallic conductor 206,127 was as guider work.But, obtain the directivity of omnidirectional basically characteristic as described antenna.

As above, providing second metallic conductor 127 with first metallic conductor 206 about the position of Y-axis symmetry.Utilize control circuit 209 control first metallic conductor 206 and second metallic conductors 127, make, described metallic conductor is switched between described guider and described earthing conductor by the change action of switch 207a, 207b.Thereby can ± directions X and+the Z direction switches the directivity of described antenna with 90 ° of intervals.Thereby, bring following advantage: can realize such antenna assembly, even when being placed during the data communication for example when making described radiation direction towards described user according to the described wireless terminal of use pattern of described wireless terminal, its also can by select with towards described user's direction opposite ± directions X comes switching direction.

Further, as long as the described antenna of such configuration is provided on vehicle, even when the direction change of described vehicle also switching direction back and forth.Therefore, bring such advantage, can receive received terrestrial digital broadcasting.

In addition, come configuration of wireless terminal by using the described directivity switched antenna of describing according to described embodiment, the feasible performance that can strengthen described wireless terminal by the directivity of switching described antenna according to the use pattern of described wireless terminal.Wireless communication system very reliably can be provided.

Present embodiment had been described supposition radiant element 203, earthing conductor 205, first metallic conductor 206 and second metallic conductor 127 had been formed on the dielectric base plate 202.But, always do not need to use described dielectric base plate.For example, radiant element 203, earthing conductor 205, first metallic conductor 206 and second metallic conductor 127 and so on are formed by compressing tablet, and can fix described element by blowing agent.

Present embodiment had been described and had been formed earthing conductor 205 with the face of the opposite dielectric base plate 202 on the surface of the dielectric base plate 202 that forms radiant element 203 with conductive pattern.For example, earthing conductor 205 can be provided at and leave dielectric base plate 202 and give on the shell of wireless terminal 211 of set a distance.By adopting such configuration, can bring such advantage, fully guarantee the interval between radiant element 203 and the earthing conductor 205, and under earthing conductor 205 is present in radiant element 203 time, can easily realize the coupling of described antenna.

In the present embodiment, use diode switch 215 as switching device.But described switching device is not limited to diode switch.Also can use other switch or other commutation circuits such as switch such as FET switch or use MEMS technology.

The length of first metallic conductor 206 and second metallic conductor 127 be provided so that when switch 207a, when 207b opens circuit described first and second metallic conductors as guider work.But, for example,, can change directivity by the reactive component of adjusting described guider equally as long as adopted the configuration of the length of the length that wherein can change first metallic conductor 206 and second metallic conductor 127.

The method that is used to change the length of the length of first metallic conductor 206 and second metallic conductor 127 can comprise: first and second metallic conductors 206 and 127 are divided into a plurality of conductor pieces along its longitudinal direction; Between corresponding a plurality of conductor pieces,

place switch

207a, 207b; And short circuit/

disconnect

207a, 207b and then change the length of described conductor piece.Perhaps, this method can comprise the variable-capacitance element that adds such as variable capacitance diode to first and second metallic conductors 206,127, and according to controlling the length that the voltage incoming call is regulated first and second metallic conductors 206,127.

By utilizing following phenomenon, promptly cause the change of the directivity that during

switch

207a, 207b short circuit, obtains, can adjust directivity handoff angle by the described antenna that comes

toggle switch

207a, 207b to obtain by short circuit and open-circuit operation by the width W m that changes first and second earthing conductors 206,127.

(the 9th embodiment)

Figure 39 is the schematic diagram according to the directivity switched antenna of the ninth embodiment of the present invention.Figure 39 (a) is a perspective view, and Figure 39 (b) is the sectional view that obtains along the line A-A ' shown in Figure 39 (a).Among Figure 39, described directivity switched antenna comprises the radiant element 216 with foldable structure.In others, present embodiment is identical with the 6th embodiment, thereby for omitting its explanation for purpose of brevity.

To the operation according to the described directional switch antenna device of the ninth embodiment of the present invention be described now.For example, among Figure 24, between radiant element 203 and earthing conductor 205, add the dielectric base plate 202 of thickness " t "=0.016 λ, make radiant element 203 and earthing conductor 205 separate each other corresponding to the amount of thickness " t "=0.016 λ.Thereby in the time of near earthing conductor 205 being placed radiant element 203, the input impedance of radiant element 203 becomes than much smaller under the situation that earthing conductor 205 is not provided.

When radiant element 203 is configured to have the foldable structure the same with radiant element 216, can increase the input impedance of described radiant element.For example, the input impedance of the twofold dipole antenna shown in Figure 40 (b) is four times of input impedance of the common dipole antenna shown in Figure 40 (a).The input impedance of three folded dipoles shown in Figure 40 (c) is octuple of the input impedance of described common dipole antenna.As the result who uses radiant element 216 as shown in figure 39 with foldable structure, can be increased in the input impedance of the described antenna that distributing point 204 obtains, this microstrip line or coaxial line based on 50 Ω easy to use mates described antenna.

As above, provide radiant element 216, and utilize control circuit 209 toggle switch 207a with foldable structure.As a result, bring following advantage: can realize such antenna assembly, it increases the input impedance of described antenna, thereby helps coupling when the directivity of switching described antennas with about 90 °, and according to the use mode switch directivity of described wireless terminal.

In addition, use the described directional switch antenna device of describing according to present embodiment to come configuration of wireless terminal.So, switch the directivity of described antenna according to the use pattern of wireless terminal, thereby strengthen the performance of described wireless terminal.Therefore, can provide wireless communication system very reliably.

Present embodiment had been described on dielectric base plate 202 and had been formed radiant element 216 with conductive pattern.But radiant element 216 also can be by forming such as the linear conductor of electric wire or by compressing tablet.

Present embodiment has been described overshoot element 216 and has been formed the wire dipole.But radiant element 216 is not limited to the wire dipole, also can be formed for example meander line.

Present embodiment had been described supposition radiant element 216, earthing conductor 205 and first metallic conductor 206 had been formed on the dielectric base plate 202.But, always do not need to use described dielectric base plate.For example, radiant element 216, earthing conductor 205 and first metallic conductor 206 and so on are formed by compressing tablet, and can fix described element by blowing agent.

In the present embodiment, with the face of the opposite dielectric base plate 202 on the surface of the dielectric base plate 202 that forms radiant element 216 on form earthing conductor 205 with conductive pattern.For example, can earthing conductor 205 be provided on the dielectric base plate 202, leave dielectric base plate 202 and give on the shell of wireless terminal 211 of set a distance but it is provided at.Bring following advantage by such configuration: can fully guarantee the interval between radiant element 216 and earthing conductor 205, and can easily realize the coupling of described antenna.

In the present embodiment, the two-dimensional structure that radiant element 203,216 is formed in the XY plane.But radiant element 203,216 is not limited to this structure.For example as shown in Figure 41 (a) and 41 (b), radiant element 203,216 can be formed the structure that the end of radiant element 203,216 wherein is folded.By such foldable structure, can shorten described antenna length, and can be with described antenna microminiaturization.

Use description to make the method for the antenna that in the YZ plane, folds as shown in Figure 41 (a) and 41 (b) now.As shown in Figure 42, the method for making antenna in the simplest mode is to handle by compressing tablet to make antenna.At this moment, handle intactly to form by compressing tablet and form the whole of radiant element: bottom conductor 217, folded part 218 and upper conductor 219.Perhaps can select, can on dielectric base plate 202, form bottom conductor 217 in advance, form and only have folded part 218 and upper conductor 219 to handle by compressing tablet with conductive pattern.

As shown in Figure 43, except handling, compressing tablet can also adopt another kind of manufacture method; For example, on dielectric base plate 202, place second dielectric base plate 220; Use flat board (planer) conductive pattern between dielectric base plate 202,220 to form bottom conductor 217; With forming upper conductor 219 towards the lip-deep conductive pattern of second dielectric base plate 220 of the surface opposite of dielectric base plate 202 with second dielectric base plate 220; Form folded part 218 with through hole that passes second dielectric base plate 220 and so on; And bottom conductor 217 is electrically connected to upper conductor 219.

By adopting such configuration, can make described directional switch antenna device with multilager base plate.As shown in Figure 44, each of bottom conductor 217, folded part 218 and upper conductor 219 can form with the pattern on the electrolyte blocks of being made by the high dielectric material such as pottery 221.By this configuration, can be to a great extent with described antenna assembly microminiaturization.

(the tenth embodiment)

Figure 45 is the schematic diagram according to the wireless terminal of the tenth embodiment of the present invention.Among Figure 45, described wireless terminal comprises transceiver unit 222, control assembly 223 and the antenna directivity switching part 224 that is set to the frequency range that is used for data communication and voice conversation.

To the operation according to the described wireless terminal of the tenth embodiment of the present invention be described now.For example, when at the described wireless terminal of indoor use, owing to the reason such as the obstacle of wall is assumed to multi-path environment.Under such situation, described antenna can be by the described multi-path environment of diversity reception operation reply.Common diversity reception operation is to realize by place a plurality of antennas in the mode of spatial separation.But using a plurality of antennas to cause installing the required zone of described antenna increases, but also the zone of the transducer that need be used to fix up an aerial wire, this antenna switching unit be used to select described a plurality of antenna wherein any one.

By using,, can realize the diversity reception of directivity the required zone maintenance of described antenna being installed in the required zone of installation individual antenna according to the described described directivity switched antenna of the 6th to the 9th embodiment.This point is described in detail.

Among Figure 45, wireless terminal 211 is formed by directivity switched antenna 201, transceiver unit 222, control assembly 223 and antenna directivity switching part 224.Utilize such configuration, receiving operating period, the high-frequency signal that is received by directivity switched antenna 201 experience frequency inverted and demodulation in transceiver unit 222, changes and the signal of demodulation is sent to control assembly 223 and institute is like this.At this moment, control assembly 223 monitors the increase (result of the described directivity of having switched as directivity switched antenna 201) of the power that receives, and transmit control signal 225 to antenna directivity switching part 224, so that obtain the directivity of the described antenna that reaches maximum receiving mode thereon.

Based on the control signal 225 by control assembly 223 outputs, antenna directivity switching part 224 determines to reach the directivity of high reception sensitivity thereon; And 226 directivity with switching direction switched antenna 201 that transmit control signal, so that obtain high reception sensitivity.By control signal 226, switching direction switched antenna 201 is so that the directivity that obtains expecting.Simultaneously, during transmit operation, the signal that is sent by control assembly 223 experience modulation and frequency inverted in transceiver unit 222, and sends the signal that institute so modulates and changes from directivity switched antenna 201.At this moment, use and to receive operating period selected directivity as the directivity of directivity switched antenna 201.

As above, described wireless terminal is formed by directivity switched antenna 201, transceiver unit 222, control assembly 223 and antenna directivity switching part 224.Can carry out diversity reception by individual antenna, thereby bring such advantage, can realize compactness, high performance wireless terminal.

The present invention describes, during transmit operation, with receiving the identical directivity user tropism switched antenna 201 that operating period adopts.But the present invention is not limited to this embodiment.Receiving operating period, carrying out diversity reception by user tropism's switched antenna 201.During sending, can be arranged so that the radiation field that is derived from described directivity switched antenna is towards user's 210 propagation of using wireless terminal 211.For example, can adopt such configuration: the back side direction that during voice conversation, the directivity emission maximum direction of directivity switched antenna 201 is fixed on wireless terminal 211; And during data communication, when sending, the directivity emission maximum direction of directivity switched antenna 201 is fixed on the top-direction of wireless terminal 211.

Present embodiment has been described the wireless terminal 211 that uses according to the described directivity switched antenna 201 of the 6th to the 9th embodiment.But the present invention is not limited to described embodiment.Can use the antenna assembly of any configuration, as long as can in top-direction (also be with about 90 °, with respect to the horizontal direction of the display surface of display unit 212, and be the direction that makes progress about the message that shows) with back side direction (direction opposite) with the display surface of display unit 212 between the directivity of the described antenna of switching.

The present invention is described in detail with reference to specific embodiment.Yet those skilled in the art under the prerequisite that does not deviate from the spirit and scope of the present invention, can make various replacements or modification to the present invention obviously as can be known.

The present invention requires the Japanese patent application (No.2004-290063) submitted on October 1st, 2004 and the priority of the Japanese patent application (No.2004-290143) submitted on October 1st, 2004, and it is all by with reference to being incorporated in this.

Industrial applicibility

Described antenna assembly of the present invention and use the described wireless terminal of this antenna assembly to bring like this Advantage, can be by short circuit and disconnect and switched described day between direction and the top-direction overleaf The directionality of line. Described antenna assembly is as being applied at the multiple mould such as voice conversation and data communication The antenna of the wireless terminal that uses under the formula of great use, it can produce high-quality communication. Further, originally Invention also can needing be used for the information terminal such as wireless terminal or PC of diversity reception operation.

Described antenna assembly of the present invention and to use the described terminal of this antenna assembly to bring so excellent Point can switch by short circuit and disconnect the directionality of described antenna between three directions. The institute Even state antenna assembly as being used in the situation that receives received terrestrial digital broadcasting, also advancing of mobile unit The antenna of row high quality communication of great use.

Claims

1. antenna assembly comprises:

Be arranged in the radiant element of the wire on first plane;

First parasitic antenna is parallel to described radiant element and is arranged on described first plane;

Be arranged in first earthing conductor on described first plane;

First switch is used for the two ends of described first parasitic antenna are connected to described first earthing conductor;

Second earthing conductor is arranged on second plane with described first planar opposite; And

Be used to control the control device of the short circuit of described switch/open circuit,

Wherein, the part of described first earthing conductor is parallel to described radiant element, is arranged in the offside of described first parasitic antenna, and described radiant element is between between it, and

Wherein, described second earthing conductor is positioned at the reverse side of described radiant element, and the end of described second earthing conductor is at the reverse side in the zone between described radiant element and described first parasitic antenna.

2. antenna assembly comprises:

Be arranged in the radiant element of the wire on first plane;

First parasitic antenna of wire is parallel to described radiant element and is arranged on described first plane;

The auxiliary element of the wire that provides at the vertical imaginary extended line two ends of described first parasitic antenna;

Be arranged in first earthing conductor on described first plane;

First switch is used for the two ends of described first parasitic antenna are connected to described auxiliary element;

Second earthing conductor is arranged on second plane opposite with described first plane; And

Wherein, described first earthing conductor is parallel to described radiant element, is arranged in the offside of described first parasitic antenna, and described radiant element is between between it, and

Described second earthing conductor is positioned at the reverse side of described radiant element, and the end of described second earthing conductor is at the reverse side in the zone between described radiant element and described first parasitic antenna.

3. antenna assembly comprises:

Be arranged in the radiant element of the wire on first plane;

Second parasitic antenna of wire is parallel to described radiant element, is provided at the offside of the above first parasitic antenna of described first plane, and described radiant element is between between it;

The auxiliary element of the wire that provides at the vertical imaginary extended line two ends of described first and second parasitic antennas respectively;

First switch and second switch are used for the described auxiliary element that provides on the both sides of described first and second parasitic antennas respectively is provided at the two ends of described first and second parasitic antennas;

Wherein, described second earthing conductor is positioned at the reverse side of described radiant element, and an end of described second earthing conductor is at the reverse side in the zone between described radiant element and described first parasitic antenna, and another end of described second earthing conductor is at the reverse side in the zone between described radiant element and described second parasitic antenna.

4. as any described antenna assembly of claim in the claim 1 to 3, further comprise first substrate that described first and second planes are provided on it.

5. as any described antenna assembly of claim in the claim 1 to 4, wherein, when described switch was opened circuit, described parasitic antenna became the guider with respect to described radiant element.

6. as any described antenna assembly of claim in the claim 2 to 5, wherein, when described switch during by short circuit, described parasitic antenna and described auxiliary element are taken on the reflector with respect to described radiant element.

7. as any described antenna assembly of claim in the claim 1 to 6, wherein, the reactance of described parasitic antenna is variable.

8. as any described antenna assembly of claim in the claim 4 to 7, wherein, described radiant element of following arrangement and described second earthing conductor make that the interval between described radiant element and described second earthing conductor becomes greater than the thickness of described first substrate.

9. antenna assembly comprises:

First substrate;

The radiant element of wire is arranged on first plane as described first one of them surface of substrate;

Earthing conductor is arranged on second plane as another surface of described first substrate;

First conductor is parallel to described radiant element, is arranged in while and described earthing conductor electric insulation on described second plane;

First switch is used for described earthing conductor is connected to described conductor; And

Wherein, described earthing conductor and described conductor one of them be positioned at the reverse side of described radiant element.

10. antenna assembly as claimed in claim 9 further comprises:

Second conductor is arranged on the position with respect to described earthing conductor and the described first conductor symmetry; And

Second switch is used for described earthing conductor is connected to described second conductor,

Wherein, described earthing conductor is positioned at the reverse side of described radiant element.

11. as claim 9 or 10 described antenna assemblies, wherein, the reactance of described conductor is variable.

12. as claim 9 or 10 described antenna assemblies, wherein, described conductor comprises:

At its a plurality of conductor pieces of dividing in a lateral direction; And

Be used to connect the 3rd switch of described a plurality of conductor pieces.

13. as any described antenna assembly of claim in the claim 9 to 12, wherein, described first switch is included in a plurality of switches that are used for described earthing conductor is connected to described metallic conductor on a plurality of positions.

14. antenna assembly as claimed in claim 13, wherein, described the 3rd switch is connected to the described metallic conductor that the position of the reverse side of the periphery of maximum voltage position on described radiant element provides with described earthing conductor.

15. as any described antenna assembly of claim in the claim 4 to 14,

Wherein, described radiant element has the dipole configuration that comprises along the structure folding with respect to the vertical direction of described substrate, and

Wherein, described radiant element comprises:

Be positioned at the bottom conductor on described first substrate;

Be positioned at the folding of the edge, two ends of described bottom conductor with respect to the vertical position of described first substrate

Folded part; And

Layout is used to connect the upper conductor of the end of described folded end.

16. antenna assembly as claimed in claim 15 further comprises:

Second substrate that on described first substrate, provides,

Wherein, described bottom conductor between described first and second substrate,

Wherein, provide described folded part to make it penetrate described second substrate, and

Wherein, on described second substrate, provide described upper conductor.

17. antenna assembly as claimed in claim 15 further comprises:

Electrolyte blocks on described first substrate,

Wherein, be provided at described bottom conductor, described folded part and described upper conductor on the described electrolyte blocks and/or in the described electrolyte blocks.

18. a wireless terminal comprises:

As any described antenna assembly of claim in the claim 1 to 17;

Be used for transceiver unit by described antenna assembly transmitting/receiving wireless electric wave;

Be used to switch the antenna directivity switching part of the directivity of described antenna assembly; And

Be used to control the control assembly of each parts,

Wherein, described control assembly switches the directivity of described antenna assembly and impels described transceiver unit to receive radio wave by impelling described antenna directivity switching part, control described antenna directivity switching part and described transceiver unit, make its directivity be confirmed as showing the described antenna assembly execution transmission of superior receiving sensitivity and receiving according to detected intensity of radio wave.

19. wireless terminal as claimed in claim 18, wherein, described control assembly executive control operation is carried out the diversity reception operation to impel described antenna assembly, and is impelled described antenna assembly to carry out transmission with the described directivity of using in accepting state in transmit status in accepting state.

20. wireless terminal as claimed in claim 18, wherein, described control assembly executive control operation, in accepting state, carry out the diversity reception operation to impel described antenna assembly, and impel described antenna assembly in transmit status, to carry out with following directivity to send, the greatest irradiation direction of described antenna assembly is orientated in the opposite direction along the side with user from described wireless terminal to this wireless terminal therein.