JP2005117482A - Antenna and mobile communication terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication terminal device capable of performing communication corresponding to a plurality of frequency bands without increasing the scale of a device configuration. <P>SOLUTION: The mobile communication terminal device such as a portable telephone set comprises an antenna 2 which is made into a strap type by inserting both ends of a wire-like antenna line into a band switching ring 8. The antenna 2 comprises a plurality of band points 14a-14g for changing an antenna line length. The band points 14a-14g correspond to the frequency bands of GPS, PHS(R) telephone set, Bluetooth(R), wireless LAN, portable telephone set, television broadcast and the like, for example, and the position of the band switching ring 8 is adjusted to the position of each of the band points 14a-14g to change a resonance frequency of the antenna 2 for the GPS, PHS(R) telephone set or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an antenna corresponding to a plurality of frequency bands suitable for application to, for example, a mobile phone, a PHS phone, a PDA device having a communication function, and a mobile communication terminal device using this antenna.

  Today's mobile phone terminals are provided with so-called “whipped antennas” and “built-in antennas” provided inside the housing as antennas.

  However, when it is intended to provide a “whipped antenna”, it is necessary to consider the design and design so that the whip antenna does not get in the way of use, and the degree of freedom of the design and design is limited.

  If a “whipped antenna” is to be provided, the casing of the mobile phone terminal is enlarged by the volume occupied by the built-in antenna, making it difficult to reduce the size of the apparatus.

For this reason, conventionally, in Japanese Patent Application Laid-Open No. 2001-352207, it has been proposed that a strap for holding a mobile phone terminal is formed of a conductive material and that this strap-type antenna is used to support wireless communication. Yes.
JP 2001-352207 A (2nd to 3rd pages: FIG. 1)

  Here, today's mobile phone terminals are desired to support various wireless applications such as GPS (Global Positioning System), Bluetooth, wireless LAN, and television broadcasting.

  However, since the strap type antenna proposed in Japanese Patent Application Laid-Open No. 2001-352207 can only support one frequency band, it cannot support various wireless applications such as the above-described Bluetooth and wireless LAN. There was a problem.

  In addition, in order to be compatible with each of the above wireless applications, it is only necessary to provide each wireless application antenna for the mobile phone terminal, but the mobile phone terminal itself is enlarged by providing these many antennas, In addition, the design and the degree of freedom of design may be limited, which is not preferable.

  The present invention is proposed in view of the above-described circumstances, and an antenna capable of communication corresponding to a plurality of frequency bands without increasing the size of the mobile communication terminal device. And it aims at provision of a mobile communication terminal device.

  The present invention provides an antenna body including an antenna wire serving as a core wire, and a ground conductor provided so as to be coaxial with the antenna wire, and one end portion of the antenna body. The antenna wire is connected to the antenna feeding point, the connector at the one end is connected to the ground potential portion, and the antenna wire is provided at least at one place on the antenna body. By using an antenna having a band point which is a hole for connecting to the antenna, and an antenna characteristic variable means for changing the antenna characteristic by connecting the antenna line to the ground conductor when inserted into the band point. Solve the above problems.

  In this antenna, at least one band point for changing antenna characteristics is provided in the antenna body. When the antenna characteristic varying means is inserted at this band point, the antenna line is connected to the ground conductor at the position of the band point.

  Thereby, the antenna length of the antenna can be set to the antenna length corresponding to the position of the band point. Therefore, by providing a plurality of band points on the antenna body and inserting the antenna characteristic variable means at the band points corresponding to the desired antenna characteristics, the antenna characteristics of the antenna can be changed to the desired antenna characteristics.

  The present invention can be used by changing the antenna characteristic of one antenna to a plurality of antenna characteristics.

  For this reason, it is possible to cope with a plurality of wireless applications with a single physical antenna. Therefore, since the antenna required for each wireless application can be a single antenna, a large number of antennas corresponding to each wireless application can increase the size of the mobile communication terminal device. It is possible to prevent the disadvantage that the degree of freedom of design is limited.

  The present invention can be applied to a so-called folding type (= shell type) mobile phone terminal that wirelessly transmits and receives voice data, packet data, and the like to and from a radio base station via an antenna.

[First Embodiment]
[Configuration of First Embodiment]
As shown in FIG. 1, the mobile phone terminal according to the first embodiment of the present invention has a mobile phone terminal body 1 and a strap-type antenna 2 that enables wireless communication corresponding to a plurality of frequency bands. doing.

(Configuration of mobile phone terminal)
The cellular phone terminal main body 1 includes a transmitter unit having a microphone unit 22, a receiver unit having a speaker unit 23, an operation unit 24 having a numeric keypad, an on-hook key, and an off-hook key, and a display unit 25 including a liquid crystal display device. It is prepared for.

  In addition, the mobile phone terminal main body 1 is configured such that a receiver unit having a speaker unit 23 is stored in a receiver unit housing 26, and a transmitter unit having a microphone unit 22 is stored in a transmitter unit housing 27. . The receiving unit casing 26 and the transmitting unit casing 27 are connected to each other in such a manner that one end sides of the receiving unit casing 26 and the transmitting section casing 27 are rotatable with respect to each other by a hinge portion 28.

  The receiving unit casing 26 has a display unit 25 on one main surface portion 26a provided with the speaker unit 23 of the receiving unit. The transmitter section housing 27 has an operation section 24 on one main surface section 27a provided with the microphone section 22 of the transmitter section.

  The receiver housing 26 and the transmitter housing 27 are in a closed state in which the main surface portions 26a, 27a are substantially in contact with each other by the hinge portion 28, and as shown in FIG. The main surface portions 26a and 27a are spaced apart from each other, and the main surface portions 26a and 27a are rotatable with respect to each other about the rotation center axis of the hinge portion 28 over a state where the angle between the main surface portions 26a and 27a is a predetermined full open angle. .

  When the mobile phone terminal main body 1 is carried (not in use), the mobile phone terminal main body 1 is in a closed state in which one main surface portions 26a and 27a of the receiver housing 26 and the transmitter housing 27 are substantially in contact with each other. To do. When the mobile phone terminal main body 1 performs a call or the like, as shown in FIG. 1, the main surface portions 26a and 27a of the receiver housing 26 and the transmitter housing 27 are separated from each other and the main surface portions. The angle formed by 26a and 27a is used as a predetermined full opening angle of about 150 ° to 180 °, for example.

(Antenna configuration)
As shown in FIG. 2, the strap-type antenna 2 includes a so-called “coaxial cable” including an antenna wire 2a serving as a first linear conductor and a ground conductor 3 serving as a second linear conductor. It has the same configuration.

  Specifically, the antenna wire 2a is a core wire of the antenna 2 and is covered with an insulating member (protective material) 4 made of a synthetic resin material such as polyester. The ground conductor 3 is provided along the outer peripheral surface of the insulating member 4, and the antenna 2 is formed by covering the ground conductor 3 with an insulating film 5 made of, for example, vinyl or silk. ing.

  One end of the antenna 2 is provided with a power supply connector 6 for connecting the antenna wire 2a to the antenna power supply point of the mobile phone terminal body 1 and connecting the ground conductor 3 to the ground potential portion of the mobile phone terminal body 1. In addition, an end point clasp 7 is provided at the other end of the antenna 2.

  Note that the physical dimensions and materials of the antenna are appropriately selected so as to realize an impedance adapted to the required antenna characteristics.

  Next, as shown in FIG. 1, the antenna 2 has a strap in which one end portion provided with the power feeding connector 6 and the other end portion provided with the end point clasp 7 are respectively inserted into the band switching ring 8. It has a shape.

  As shown in the longitudinal sectional view of FIG. 3, the band switching ring 8 includes a conductor portion 9 made of a ring-shaped conductive material and a ring-shaped insulating portion 10 that covers the outer peripheral surface portion of the conductor portion 9. ing. The band switching ring 8 includes a first rib 11 provided so as to protrude from the inner peripheral side toward the central axis, and a second rib provided opposite to the first rib 11. 13.

  The first rib 11 is a movable rib, and is formed of a conductive member such as a leaf spring or a spring member, as well as a rib main body 11a formed of a conductive member having a cylindrical shape or a quadrangular prism shape. And a spring contact 12. One end portion of the spring contact 12 is fixedly attached to the rib main body 11 a and the other end portion is fixedly attached to the conductor portion 9 of the band switching ring 8.

  Such a first rib 11 is urged toward the center of the antenna 2 as indicated by an arrow A in FIG. 3 by the elastic force of the spring contact 12, and the rib main body 11 a is applied to the antenna 2. When inserted into a plurality of band points 14 (antenna length changing holes into which the first ribs 11 are inserted), one end of the rib main body 11a (= the side where the spring contact 12 is not attached) The end portion is in contact with the antenna wire 2 a in the antenna 2 through the band point 14.

  In this example, since the rib main body 11a of the first rib 11 that contacts the antenna wire 2a is formed of a conductive member, the notch end portion of the band point 14 has the rib main body 11a within the antenna 2. The non-conductive member 40 is coated so as not to contact the ground conductor 3.

  In this example, the rib main body 11a of the first rib 11 is formed of a conductive member. However, as shown in FIG. 4, the rib main body 11a is formed of a non-conductive member and the antenna 2 of the antenna 2 is used. Only the portion in contact with the wire 2a may be formed by the conductive member 11b. In this case, the conductive member 11b is connected to the spring contact 12 through the inside of the rib main body 11a formed of a nonconductive member (in FIG. 4, the connection relationship between the conductive member 11b and the spring contact 12 is indicated by a dotted line). Is shown.)

  As a result, even when the first rib 11 is inserted into the band point 14, the rib main body 11 a is formed of a non-conductive member even if the notched end of the band point 14 contacts the rib main body 11 a. Therefore, the non-conductive member 40 provided for covering the cut-out end portion of the band point 14 can be omitted.

  In this way, the second rib 13 is a non-movable fixed rib with respect to the first rib 11 that is movable by the spring contact 12, and one end of the conductor of the band switching ring 8 is, for example, by soldering or the like. The other end is fixedly attached to the ground conductor 3 in the antenna 2 through a fixing rib hole 15 provided at a predetermined position of the antenna 2.

  As will be described later, in the antenna 2, the band switching ring 8 is fixed with a left thumb and an index finger, for example, as shown by an arrow in FIG. Is pulled out from the band switching ring 8 or operated in a manner of being pushed into the band switching ring 8, thereby inserting the rib main body 11a of the band switching ring 8 into desired band points 14a to 14g.

  Thereby, at the position of the band point where the rib main body 11a is inserted, the antenna wire 2a of the antenna 2 passes through the rib main body 11a, the spring contact 12, the conductor portion 9 of the antenna 2 and the fixing rib 13, as shown in FIG. Thus, it is connected to the ground conductor 3 of the antenna 2 so that a desired antenna length is realized.

(Electric configuration of mobile phone terminal)
FIG. 5 shows a block diagram of the mobile phone terminal body 1. As can be seen from FIG. 5, the mobile phone terminal main body 1 has a control line 30 and a data line 33.

  Connected to the control line 30 are a communication circuit 31 serving as a transmission / reception unit, a display unit 25, an operation unit 24, a memory 32, and a control unit 29. Each block 24, 25, 31, 32 connected to the control line 30 operates under the control of the control unit 29.

  In addition to the display unit 25, the communication circuit 31, and the memory 32, the microphone unit 22 and the speaker unit 23 are connected to the data line 33.

  The communication circuit 31 has a feeding point 17 for the strap-type antenna 2, and the antenna line 2 a of the antenna 2 is connected to the feeding point 17.

  That is, the communication circuit 31 is provided with a contact portion to which the power feeding connector 6 is connected. By connecting the power feeding connector 6 to this contact portion, one end of the antenna wire 2 a is connected to the antenna feeding point 17. One end portion of the ground conductor 3 is connected to the ground potential portion of the mobile phone terminal body 1.

  The antenna 2 can perform communication corresponding to the frequency band of the antenna length corresponding to each of the band points 14a to 14g by selecting the band points 14a to 14g into which the rib main body 11a of the band switching ring 8 is inserted. It has become. For this reason, this communication circuit 31 is an example, but communication processing corresponding to each frequency band such as GPS, PHS telephone, Bluetooth, wireless LAN, cellular phone, television broadcasting, non-contact IC card, etc. can be performed. ing.

  Further, the communication circuit 31 has a tuner, and when the antenna 2 is adjusted so as to receive a television broadcast, the channel selected by the user is selected and the reception process of the television broadcast is performed. It has become.

[Functions of First Embodiment]
In the case of such a mobile phone terminal, the user adjusts the antenna length of the strap-type antenna 2 in accordance with the function used by the GPS, Bluetooth, wireless LAN or the like. When adjusting the antenna length, the user, for example, picks the band switching ring 8 with the thumb and forefinger of the left hand and holds the end clasp 7 with the thumb and forefinger of the right hand, as shown by the arrow in FIG. The antenna length is adjusted so that the first rib 11 of the band switching ring 8 is inserted into the band points 14a to 14g corresponding to the function to be used by pulling or pushing the antenna 2. .

  Specifically, when the antenna 2 is pulled or pushed, the spring contact 12 is subjected to a force in a direction in which the spring contact 12 is compressed. When the spring contact 12 is contracted by this stress, the first rib 11 is detached from the band point 14. When the first rib 11 is disengaged from the band point 14, the tip portion of the first rib 11 is in contact with the insulating film 5. If the antenna 2 is further pulled or pushed into the antenna 2 in this state, the other band point 14 moves to the position of the first rib 11, and the first rib 11 again moves to another band. The tip 14 of the first rib 11 is brought into contact with the antenna wire 2a and the antenna length of the antenna 2 changes.

  The manner in which the antenna length changes will be described using the equivalent circuit of FIG. In the equivalent circuit of FIG. 6, the antenna wire 2 a and the ground conductor 3 are provided from the power feeding connector 6 serving as a power feeding point to the end point stopper 7, and the antenna 2 is pulled or pushed. The antenna contact 2 is moved and the antenna wire 2a is connected to the ground conductor 3 at the point (the band point 14) at which the spring contact 12 is moved.

  If the coordinate u is taken along the antenna line 2a and u = 0 in the power supply connector 6 and u = 1 in the end point clasp 7, the effective antenna line length for radiation is λ (u), which is expressed as a function of the coordinate u. be able to.

  That is, the effective antenna length is “λ (A)” when the position of the spring contact 12 is the position indicated by “A” in FIG. 6, and the position of the spring contact 12 is the position indicated by “B” in FIG. Is “λ (B)”.

  When the antenna line length λ (u) changes, the resonance frequency of the antenna 2 also changes. For this reason, the resonance frequency of the antenna 2 is different between the case where the position of the spring contact 12 is the position indicated by “A” in FIG. 6 and the case where the position of the spring contact 12 is the position indicated by “B” in FIG. Different.

  As shown in FIG. 7, the antenna 2 has a power feeding connector 6 connected to an antenna feeding point 17 of the circuit unit 16 of the mobile phone terminal main body 1 provided with the communication circuit 31, and a ground potential of the circuit unit 16. The ground conductor 3 is connected to the portion 18.

  Further, the first rib 11 is fitted into the band point 14, whereby the antenna wire 2 a of the antenna 2 is connected to the ground conductor 3 through the spring contact 12. Therefore, by changing the position of the first rib 11 of the band switching ring 8 to the positions of the band points 14a to 14g, the resonance frequency of the antenna 2 is changed to f1, f2,. Can be changed.

Therefore,
Band point 14a for non-contact IC card (frequency f1),
Band point 14b is used for television broadcasting (frequency f2),
Band point 14c for mobile phone (frequency f3),
Band point 14d for GPS (frequency f4),
Band point 14e for PHS telephone (frequency f5),
Band point 14f for Bluetooth (frequency f6),
The band point 14g is for wireless LAN (frequency f7),
By selecting the band point 14 into which the first rib 11 of the band switching ring 8 is inserted according to the frequency band used by the user, communication corresponding to each frequency band can be made possible.

[Effect of the first embodiment]
As is apparent from the above description, the cellular phone terminal according to the first embodiment selects the band point 14 into which the first rib 11 of the band switching ring 8 provided in the strap type antenna 2 is inserted. Thus, the antenna length of the antenna 2 can be changed, and communication corresponding to a plurality of frequency bands can be made possible.

  Since the strap-type antenna 2 provided externally to the mobile phone terminal body 1 is used as the antenna, the whip antenna and the built-in antenna provided in the mobile phone terminal body 1 can be omitted. Since the whip antenna and the built-in antenna can be omitted, the mobile phone terminal body 1 can be downsized.

  Further, since the antenna length is adjusted by operating the strap (= the antenna 2) which is a part of fashion today, the user can adjust the desired antenna length while having fun.

  In the description of the first embodiment described above, the antenna length is changed when the first rib 11 of the band switching ring 8 is fitted into each of the band points 14a to 14g. However, the antenna 2 may have predetermined antenna characteristics in a state where the first rib 11 is not inserted into any of the band points 14a to 14g (= use without connecting the antenna wire 2a to the ground conductor 3). In this case, the total length of the antenna 2 may be adjusted so as to have predetermined antenna characteristics.)

  In this case, the frequency band that can be used in a state where the antenna line 2a is not connected to the ground conductor 3 can be increased as a frequency band that can be handled. Alternatively, the number of band points 14 provided in the antenna 2 can be reduced.

[Second Embodiment]
Next, a mobile phone terminal according to the second embodiment of the present invention will be described.

  The cellular phone terminal of the first embodiment described above changes the location where the antenna line 2a and the ground conductor 3 are connected by selecting the band points 14a to 14g into which the first rib 11 is inserted. The antenna length was changed.

  On the other hand, in the cellular phone terminal of the second embodiment, the antenna wire 2a is cut at one place, and the rib of the band switching ring 8 is inserted into the cut place (band point). Thus, the antenna line 2a cut through the rib is connected to realize the antenna length before connection and the antenna length after connection.

[Configuration of Second Embodiment]
That is, the mobile phone terminal according to the second embodiment is configured by providing the band point 14 of the strap-type antenna 2 only at one place and cutting the antenna wire 2a at this place as shown in FIG. Is.

  In this case, the antenna wire 2 a extends from the power supply connector 6 to one edge of the band point 14, and from the other edge of the band point 14 to the end point clasp 7. It is divided into two parts with the tip side part provided.

  As shown in FIG. 9, the band switching ring 8 is a cylindrical rib main body 20 formed of an insulating member as shown in FIG. 9, and is attached to the distal end side of the rib main body 20 and formed of a conductive member. 1st rib 11a provided with the conductor part 21 made.

  The fixed rib of the band switching ring 8 has the same configuration as the fixed rib 13 shown in FIG.

  The opposite end side (the side opposite to the side where the conductor portion 21 is provided) of the rib main body 20 is attached to the inner side portion of the band switching ring 8 via the spring contact 12, and the spring contact 12 When the antenna 2 is pulled or pushed, the first rib 11a is bent as shown by an arrow C in FIG.

[Functions of Second Embodiment]
In the cellular phone terminal according to the second embodiment, when the first rib 11a is inserted into the band point 14, the antenna wire 2a cut at the band point 14 is connected to the conductor portion 21 of the first rib 11a. And the length of the antenna line 2a is the length from the power feeding connector 6 to the end point clasp 7 (= longest).

  On the other hand, when the first rib 11 a is not fitted into the band point 14, the antenna line 2 a remains cut at the band point 14, and the length of the antenna line 2 a is changed from the power feeding connector 6. The length is up to the band point 14.

  When the first rib 11a is inserted into the band point 14, the corresponding frequency band when the antenna length becomes the longest is set to a frequency band for mobile phones, for example, and the first rib 11a is separated from the band point 14. When the corresponding frequency band is set to another frequency band such as GPS, communication corresponding to the two frequency bands can be made possible.

  In this antenna, the characteristics of the antenna differ depending on whether or not the antenna wire 2a is grounded to the ground potential (ground conductor) in the end point clasp 7. Therefore, whether or not the antenna wire 2a is grounded depends on the desired antenna. It will be selected according to the characteristics.

[Effects of Second Embodiment]
As is clear from the above description, the antenna 2 provided in the mobile phone terminal according to the second embodiment depends on whether or not the first rib 11a of the band switching ring 8 is inserted into the band point 14. The resonance frequency of the antenna can be switched in two stages.

  By limiting the communication frequency to two frequency bands, it is possible to ensure sufficient communication characteristics because the frequency band that can be communicated is small, and the cellular phone terminal of the first embodiment described above Similar effects can be obtained.

  In the above description of the second embodiment, it is assumed that only one band point 14 is provided (= the antenna line 2a is divided into two). A configuration in which a band point 14 is provided and a plurality of ribs are prepared, and ribs are inserted into the band points 14 to connect the antenna lines 2a divided into three or more to change the antenna length. It is good.

[Third Embodiment]
Next, a mobile phone terminal according to the third embodiment of the present invention will be described. The cellular phone terminal according to the third embodiment is provided with other antennas in addition to the strap-type antenna 2 and performs diversity processing on information received by these antennas.

[Configuration of Third Embodiment]
The cellular phone terminal according to the third embodiment has a “whipped antenna 19” indicated by a dotted line in FIG. 1 together with the strap-type antenna 2. The whip antenna 19 is an antenna that can handle a desired frequency band (or a plurality of frequency bands) such as a frequency band of a mobile phone and a frequency band of television broadcasting.

  Each of these antennas 2 and 19 is connected to a communication circuit 31 as shown in FIG. 4, and the communication circuit 31 is one of the information received by each antenna 2 and 19 that has a good radio wave state. Information processing is performed by selecting information.

  Note that the communication circuit 31 may combine information received by the antennas 2 and 19 to form information on a good radio wave state and perform information processing (combining diversity).

[Operation of Third Embodiment]
For example, a specific operation will be described by taking the case where the whip antenna 19 is an antenna for receiving a television broadcast as an example. When viewing a television broadcast, the user designates a desired channel via the operation unit 24. Then, the television broadcast viewing operation is performed, and the first rib 11 of the strap-type antenna 2 is inserted into the television broadcast band point 14b (see FIG. 1). Accordingly, the television signal is received by the whip antenna 19 and the strap type antenna 2 and supplied to the communication circuit 31.

  When the control unit 29 detects the viewing operation of the television broadcast, the control unit 29 controls the communication circuit 31 so as to perform the diversity processing on each television signal received by the whip antenna 19 and the strap-type antenna 2, and the diversity processing is performed. The tuner of the communication circuit 31 is subjected to channel selection control so that a television signal of a desired channel is selected from the television signal.

  Thus, the television signals received by the antennas 2 and 19 can be diversity-processed to receive the television broadcast, so that the television broadcast can be viewed in a good reception state.

  Next, a specific operation will be described with another example in which the whip antenna 19 is an antenna for a mobile phone. In this case, the user inserts the first rib 11 of the strap-type antenna 2 in advance into the cellular phone band point 14c in advance. When receiving a call or during a call (including reception such as standby such as intermittent reception), information (voice data, character data, image data, video data, etc.) transmitted from the base station is sent to the whip antenna 19 and the strap type. Are received by the antennas 2 respectively.

  When the incoming call is detected or a transmission instruction is given from the user, the control unit 29 controls the communication circuit 31 to perform diversity processing on the information transmitted from the base station.

  As a result, the information transmitted from the base station can be received after being subjected to diversity processing, so that voice calls, videophone calls, mobile mail reception, etc. can be performed in a good reception state.

[Effect of the third embodiment]
As is clear from the above description, the mobile phone terminal of the third embodiment uses the information received by the strap antenna 2 and the information received by the whip antenna 19 after being subjected to diversity processing. it can. For this reason, good information can always be received and used.

  In the above description of the third embodiment, diversity between the strap-type antenna 2 and the whip antenna 19 is used. However, diversity between the strap-type antenna 2 and the “built-in antenna” is used. May be. Further, diversity of the strap-type antenna 2, the whip antenna 19, and the built-in antenna may be taken. Furthermore, a plurality of strap-type antennas 2 may be provided, and diversity of each strap-type antenna 2 may be taken.

[Other application examples]
Finally, each of the above-described embodiments is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiments. For example, in the description of each embodiment described above, the present invention is applied to a foldable mobile phone terminal. However, the present invention is not limited to a stick type (= straight type) mobile phone terminal, Each main surface of the housing is connected to each other via a rotation mechanism that rotates along the surface direction of the main surface, so that one of the housings can be rotated in the clockwise or counterclockwise direction and deployed. It can also be applied to a side-opening type (= revolver type) mobile phone terminal. Even when the types of mobile phone terminals to be applied are different, the same effect as described above can be obtained.

  Thus, each of the above-described embodiments is an example of the present invention. For this reason, the present invention can be modified in various ways according to the design and the like as long as it does not deviate from the technical idea according to the present invention other than the above-described embodiments. I add that there is something.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an external appearance of a mobile phone terminal main body and a strap type antenna of a mobile phone terminal according to a first embodiment to which the present invention is applied. It is a perspective view which fractures | ruptures and shows the structure of the said antenna. It is a longitudinal cross-sectional view which shows the structure of the said antenna. It is sectional drawing which shows the other example of the 1st rib of the band switching ring of the said antenna. It is a block diagram of the said mobile telephone terminal. It is a figure which shows the equivalent circuit of the said antenna. It is a figure which shows the connection state of the said mobile telephone terminal main body and the said antenna. It is a perspective view which shows the external appearance of the strap type | mold antenna provided in the mobile telephone terminal which becomes 2nd Embodiment to which this invention is applied. It is a figure which shows the structure of the principal part of the said antenna provided in the mobile telephone terminal of the said 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Mobile phone terminal main body, 2 Antenna, 2a Antenna line, 3 Ground conductor, 6 Feed connector, 8 Band switching ring, 11 1st rib, 13 2nd rib, 22 Microphone part, 23 Speaker part

Claims (7)

An antenna body including an antenna wire serving as a core wire, and a ground conductor provided to be insulated from the antenna wire so as to be coaxial with the antenna wire;
A connector part for connecting the antenna wire at one end of the antenna body to an antenna feeding point, and connecting the ground conductor at the one end to a ground potential part,
A band point, which is a hole for connecting the antenna wire to the ground conductor, provided in at least one place on the antenna body;
Antenna characteristics varying means for varying the antenna characteristics by connecting the antenna line to the ground conductor when inserted at the band point. The antenna of claim 1,
The antenna body has a fixing rib hole for connecting to the ground conductor,
The antenna characteristic varying means is
The antenna characteristic variable ring inserted in a state where the antenna body is aligned with the one end and the other end,
A conductive portion provided along the inner periphery of the antenna characteristic variable ring;
The conductive member is formed with one end connected to the antenna wire of the antenna body through the band point, and the other end is connected to the antenna characteristic variable ring through an elastic member formed of a conductive member. A displaceable first rib connected to the section;
One end is fixedly connected to the ground conductor of the antenna body through the fixing rib hole, and the other end is fixed to the conductive portion of the antenna characteristic variable ring. A second rib,
The antenna is characterized in that the antenna line and the ground potential portion are connected through the first rib, the elastic member, the conduction portion of the antenna characteristic variable ring, and the second rib. A series of antenna lines is divided into at least two antenna pieces. The one antenna piece has predetermined antenna characteristics, and the antenna pieces are connected to each other in a conductive state. An antenna body having different antenna characteristics;
A band point that is a hole provided at a position corresponding to a division position of each antenna piece of the antenna body,
A connector for connecting one end of the antenna wire of the antenna body to the antenna feeding point;
By electrically connecting the antenna pieces through the band point, the antenna characteristics of the antenna main body are set to the antenna characteristics corresponding to the series of antenna wires, or the antenna pieces are kept divided. And an antenna characteristic varying means for setting the antenna characteristic of the antenna body to an antenna characteristic corresponding to the one antenna piece. The antenna according to claim 3, wherein
Having holes for fixing ribs provided at predetermined locations of the antenna body,
The antenna characteristic varying means is
The antenna characteristic variable ring inserted in a state where the antenna body is aligned with the one end and the other end,
A first rib that is formed of a conductive member and is elastically displaceable so as to establish a conductive connection between the antenna pieces by being inserted into the antenna body through the band point;
One end portion is fixedly connected to the antenna body through the fixing rib hole, and the other end portion has a second rib fixed to the inner peripheral portion of the antenna characteristic variable ring. Characteristic antenna. An antenna feed point;
A ground potential section;
An antenna main body including an antenna wire serving as a core wire, and a ground conductor provided so as to be coaxial with the antenna wire, and the antenna wire at one end of the antenna main body. Connect to the antenna feeding point, connect the ground conductor at the one end to the ground potential part, and connect the antenna wire provided at least at one location on the antenna body to the ground conductor An antenna including a band point which is a hole for performing the antenna, and an antenna characteristic variable means for changing the antenna characteristic by connecting the antenna line to the ground conductor when inserted into the band point;
Information processing means for performing predetermined information processing corresponding to the information received by the antenna based on the antenna characteristics varied by the antenna characteristic varying means and taken in via the antenna feeding point; A mobile communication terminal apparatus. An antenna feed point;
A series of antenna lines is divided into at least two antenna pieces. The one antenna piece has predetermined antenna characteristics, and the antenna pieces are connected to each other in a conductive state. An antenna body having different antenna characteristics, a band point which is a hole provided at a position corresponding to the division position of each antenna piece of the antenna body, and one end of the antenna wire of the antenna body are connected to an antenna feeding point. By connecting the antenna pieces to each other via the band point via the connector portion to be connected to the antenna, the antenna characteristics of the antenna body are made to be antenna characteristics corresponding to the series of antenna wires, or the antenna pieces are The antenna characteristics of the antenna main body can be changed to the one of the antennas by keeping them separated. An antenna and an antenna characteristic varying means for the antenna characteristic corresponding to the pieces,
Information processing means for performing predetermined information processing corresponding to the information received by the antenna based on the antenna characteristics varied by the antenna characteristic varying means and taken in via the antenna feeding point; A mobile communication terminal apparatus. The mobile communication terminal apparatus according to claim 5 or 6, wherein
A second antenna having an antenna characteristic corresponding to at least one of the plurality of antenna characteristics varied by the antenna characteristic varying means, and provided separately from the antenna;
Diversity processing means for diversity-processing information received by the antenna and the second antenna and supplying the information to the information processing means. A mobile communication terminal apparatus, comprising:

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