CN1357160A

CN1357160A - Antenna device

Info

Publication number: CN1357160A
Application number: CN 00809099
Authority: CN
Inventors: C·G·布洛姆; M·兰戴厄斯; H·林德维斯特
Original assignee: Moteco AB
Current assignee: PERLOS (GUANGZHOU) ELECTRONIC COMPONENTS CO Ltd
Priority date: 1999-06-17
Filing date: 2000-06-14
Publication date: 2002-07-03
Anticipated expiration: 2020-06-14
Also published as: WO2000079644A1; AU6031900A; SE9902315D0; CN1275352C; SE9902315L; SE516466C2

Abstract

An antenna arrangement for use in several frequency bands, the antenna arrangement comprising two radiating elements. The first element is a rod-shaped device (22) which emits in several frequency bands, and the second element (15) comprises a pattern of conductor portions arranged on a carrier made of an insulating material, which element (15) also emits in several frequency bands. The pattern of conductor sections is selected to be a planar angular helix with a plurality of electrically conductively connected, substantially straight conductor sections (16, 16 '… … 17, 17' … …). The rod-shaped means (22) is coupled to the carrier (4) and is thereby non-galvanically supplied. Preferably, the support (4) is wound in a tubular or channel shape with an axial opening or slot. The conductor part of the carrier (4) is joined to edges (26, 27), which edges (26, 27) meet along the opening or slot. The shaft portion (22) extends axially in the region of the opening or groove.

Description

Antenna assembly

Technical field

The present invention relates to a kind of antenna assembly, this antenna assembly is designed for a kind of so-called mobile phone of several frequency bands, it comprises one first element and one second element, this first element is launched on several frequency bands and is a rod-like device, and this second element is in emission on the several frequency bands and the pattern that is arranged on the conductor part on the carrier that is made of insulating material is arranged.

Background technology

With a flagpole antenna and the antenna structure that a small-sized compact antenna that links to each other with the bottom of this flagpole antenna combines, be well-known in the present technique field.

Flagpole antenna itself has been widely known by the people and is very effective in the present technique field.

As for little and compact antenna, carried out various trials it has been used, this antenna shows as the curved conductor that is applied on the paper tinsel shape carrier in open mode.This carrier rolling around or be wrapped in a cylinder, circular cone or oval-shaped supporting member, thereby make its structure become compact.

There is critical defect due to the fact that in such structure, owing to be wrapped with paper tinsel, the result makes the opposite end of crooked single or multiple conductors lean on very closely mutually, and from the angle of electricity, conductor has been subjected to intense influence each other with consequently.This means after the parcel operation is finished, must guarantee between the opposite end of antenna assembly, to have safe distance.This will make the entire antenna device comparatively speaking relative with whole usable area less at the shared area of open mode.Therefore, free space is not utilized well.This makes antenna all incur loss aspect bandwidth and the efficient two.

Etching or with other method production conductor pattern constitutes a radiated element on a kind of plastic foil of insulation or other appropriate carriers, this idea is seemingly tempting.But, this plastic foil is wrapped in a cross section is circle or oval, put it briefly on circular or avette cylinder or the cone time, brought such problem, promptly as mentioned above, the different piece of radiated element can produce film mutually and ring, and the performance of this antenna is destroyed or at least by grievous injury like this.If rolled-up carrier will be placed to the place of next-door neighbour with the additional antenna element of flagpole antenna form, these problems are not easy to be resolved naturally.

In paper tinsel shape antenna, its objective is that the surface that makes its radiated element is big as much as possible with respect to the outside dimension of plastic foil, so that make resulting antenna that big as far as possible aperture be arranged.

Radiated element is bigger with respect to the external dimensions of plastic foil, and this radiated element has increased the weight of interactional problem between the different piece of above-mentioned radiated element.

Up to now, also there be not the solution of proposition to this problem, promptly how to constitute the pattern of the electric conductor of radiated element,, influencing each other between the different piece of this radiated element minimized so that a maximum sized radiated element is provided on given area.

Goal of the invention

The present invention designed by the antenna shown in the preamble for reaching its purpose, overcome like this prior art intrinsic shortcoming, and this antenna will have peak efficiency, and in the frequency band that it adopts splendid bandwidth be arranged, and also accomplish maximum miniaturization simultaneously.In addition, the present invention has also designed according to antenna of the present invention for reaching its purpose, can use reasonable manner like this, makes this antenna with low cost.

Summary of the invention

If have following feature by the antenna assembly shown in the preamble, the purpose that forms basis of the present invention so will be achieved, this feature is the horn shape helix that the pattern of conductor part is substantially shaped as the plane, this helix have a plurality of that conduct, substantially for straight conductor part, and rod-like device combines with carrier, thus by non-power supply in electrical contact.

In an advantageous embodiments, carrier is wound into tubulose or through hole shape.

Verified, by provide the plane, be mainly spiral yarn shaped radiated element, make simultaneously to have a plurality of straight conductors that are essentially on this radiated element, the antenna assembly that is produced will have at least two resonance frequencys.In addition, verified, even the opposite end of this radiated element is close mutually after the parcel operation is finished, can not influence performance significantly yet.At last, just can produce this antenna assembly simply, the one side of this plastic foil or may be that the two sides has the thin metal level of one deck by on the flexiplast paper tinsel, carrying out etching.

Description of drawings

Below will be described in more detail the present invention with particular reference to accompanying drawing, in the accompanying drawings:

Fig. 1 be from antenna assembly of the present invention parts (comprising one second radiated element) below observe obliquely and a decomposition view obtaining;

Fig. 2 is included in the rod-like device in the device of the present invention, the exploded view of a first emitting element;

Fig. 3 shows a carrier that has radiated element, and this radiated element is included in apparatus of the present invention;

Fig. 4 is a view with second embodiment of the corresponding device of the present invention of Fig. 3;

Fig. 5 is a view with the 3rd embodiment of the corresponding device of the present invention of Fig. 3;

Fig. 6 is a view with the 4th embodiment of the corresponding device of the present invention of Fig. 3;

Fig. 7 is a view with the 5th embodiment of the corresponding device of the present invention of Fig. 3; And

Fig. 8 is a view with the 6th embodiment of the corresponding device of the present invention of Fig. 3.

Embodiment

As mentioned above, device of the present invention mainly is intended for use so-called mobile phone, this mobile phone should be a double frequency banding pattern at least, so it will cover the EGSM-frequency band of 880-960MHz, and be respectively the DCS-of 1710-1880MHz and 1850-1990MHz and at least one frequency band in the PCS-frequency band.Needless to say, preferably it can cover whole three frequency bands.

In the following description, will adopt term " radiated element ".Nature, it means that this element must launch electromagnetic quantities in above-mentioned frequency band.Yet term " radiated element " also will be understood like this, and promptly it can also accept electromagnetic quantities in above-mentioned frequency band.

Referring to Fig. 3-8, what should be mentioned in that is that these figure are with about 1: 1 scale.

Among Fig. 1, Reference numeral 1 relates to a carrier part of this antenna assembly, and this antenna assembly is designed to cover at least at least one in GSM-frequency band and other frequency band.This carrier part is formed by electric insulation and non-magnetic suitable plastic material manufacturing.This carrier part is used for fixing on the carrier of the housing of mobile phone and these two radiated elements, and these two radiated elements are the first emitting element that occurs of the form with rod-like device 22 (Fig. 2) and second radiated element of a small-sized compactness.

Carrier part has a core or body part 3, and this core or body part 3 have two vertical or axially extended apertures of difference or

hole

23 and 24, and its mesopore 23 is used for installing a contact device 5, and hole 24 is used for putting rod-like device 22.

In Fig. 1, contact device 5 is shown as to be brought up on the vertical hole 23, and comprises a ground connection axle sleeve 6, and this ground connection axle sleeve 6 is connected on the casing of mobile phone.On ground connection axle sleeve 6, a hold-down support 7 is arranged, by this hold-down support 7 contact device 5 is fixed in the hole 23 in the core segment 3.On this hold-down support, an insulator 8 and a soldering pin 9 are arranged, this soldering pin is used for the electrical connection of second radiated element, and this second radiated element is arranged on the carrier of being made by plastic foil (following will being described in greater detail) 4.

Be under the state that assembles at contact device 5, connector 6 is positioned at the downside of core segment 3 and extends by hole 23.

Performance is unconspicuous in Fig. 1 is, core segment 3 inside show as a chamber 25, when antenna is in the state that assembles, places this carrier 4 in this chamber 25.In this state, the upper end of soldering pin 9 flushes with the bottom of chamber 25.

Carrier 4 according to Fig. 1 is rolled into tubulose or channel form, and between the

opposite end

26 and 27 of this carrier at a certain distance its cross section can be approximated to be U-shaped, C shape or the shape of a hoof.An axial perforate or groove between

edge

26 and 27, have been formed like this.

In Fig. 2, shown a rod-like device 22, this rod-like device 22 is included in according among the device of the present invention.In an illustrated embodiment, it is designed to put in order ripple resonance in one or more high frequency bands, and carries out half wave resonances in one or more low-frequency bands, and the GSM frequency band is exactly in this low-frequency band.Another kind of mode also can be arranged in rod-like device and carry out half wave resonances in the high frequency band, and carries out quarter-wave resonance in low-frequency band.Can find out clearly that from figure rod-like device extends through protection outer cover 11, this protection outer cover 11 plans to be fitted in the outside of core or body part 3, and in place by means of rib and groove (not showing) engaging.At the state that assembles, rod-like device 22 extends through the hole 24 in the core segment 3.The direction that this means perforate between two

edges

26 and 27 of the axially extended direction of rod-like device and carrier 4 or groove is identical.Suitable relative position may be such between rod-like device and the carrier 4, and promptly this rod-like device places outside two perforates or groove between the edge whole or in part.It also may be inserted in the carrier 4 more.Above-mentioned rod-like device 22 with have of the above-mentioned mutual setting of the carrier 4 of metal conductor portion (following will the description in more detail) along its

edge

26 and 27, make that electricity is isolated between the radiated element on this rod-like device and the carrier 4, and non-ly thus power with conducting.

Rod-like device 22 can move being recovered between position in the mobile phone and the extrusion position at one on its longitudinal direction, reaches in this rod-like device of extended position on the upside of protection outer cover 11.

Rod-like device 22 has a upper part 28 that has grasping element 29, and this upper part 28 and grasping element 29 are all made by electric insulation and non-magnetic material.At the punctured position of rod-like device, upper part 28 between two

edges

26 and 27 of carrier 4 perforate or the zone of groove, the radiated element on so just can interference carrier 4.

In an illustrated embodiment, mast itself is telescopic design, and an interior bar or lead 30 and a pipe 31 that places this bar or the lead outside are arranged.Lead 30 and pipe 31 are made by having good mechanical strength and having certain flexible steel at least.

In the lower end of lead 30, be provided with a spring 32, this spring is collapsible in pipe, is used for being connected with its inner formation friction and being electrically connected.

There is an outstanding globule 33 lower end at pipe 31, and the effect of globule 33 is, is engaged in 24 inside, hole of core segment 3 by make globule 33 with appropriate device, and the rod-like device 22 that will be in extended position is fixed.

Fig. 3-8 has shown various alternative embodiment of the radiated element 15 that is arranged on the carrier 4.

The modification of the radiated element that is substantially the spiral linearity on two planes of expression among Fig. 3 and 4, this radiated element is included in according in the device of the present invention.This radiated element has a power pack 13, and this power pack 13 is inserted in the groove 10 of core segment 3, and this power pack 13 has a lower end shown in the figure 14, and this lower end plans to be electrically connected with soldering pin 9 on the contact device 5.

Fig. 3 shows, power pack 13 is connected on the straight and vertical substantially conductor 17 in outside with its upper end, and this conductor dbus is crossed a remarkable bending or angled conductor part 18 and a basic straight horizontal conductor part 16 and coupled together with conducting.This horizontal conductor part 16 is connected on the one second vertical substantially conductor part 17 ' through one second angled conductor part 18 ', this conductor part 17 ' again in its underpart by another angled conductor part 18 " be connected with the conductor part 16 ' of basic horizontal.So just described horn shape, the plane and be essentially square helical or outer " circle " of helix.This helix is inwardly continuing with the on all four mode of aforesaid way, and in the embodiment shown in fig. 3, it is more to have continued three " circles ".The inner of helical or helix ends at cecum.Crooked or

angled conductor part

18,18 ', 18 " etc. the angle of bend size be 70-110 °, this angle dependence is in the configuration of carrier 4 and decide.Angle of bend can be different for the different angled part of same radiated element.

The identical principle of embodiment that is provided with Fig. 3 is provided embodiment according to Fig. 4, but turns to the right hand, with the switched in opposite of the embodiment that is provided among Fig. 3.Another is not both according to the embodiment of Fig. 4 low and elongated in the horizontal direction, and consequently this embodiment has been full of sizable part on the surface of carrier 4.Can expect that this bigger surface range can make the antenna of finishing have bigger perforate, thereby have emissivities preferably.

The radiated element 15 of above-mentioned horn shape, helix all is from the power supply of the outside of its outer circumferential edge.

Verified, have two resonance frequencys at least according to the radiated element of Fig. 3 and 4.Higher resonance frequency mainly is the height by helix, promptly among Fig. 3 by vertical conductor part 17 and 17 ' length determined.This length is short more, and resonance frequency is high more, and vice versa.Lower resonance frequency is by all

conductors

16,17,16 ', 17 ' etc. total length, promptly " is included in the total line length in the helix " and is determined.In fact, this means that under the situation of assigned altitute, the width of helix is the length of horizontal conductor 16, has determined lower resonance frequency.Similar with the above, these length are short more, and resonance frequency is high more, and vice versa.In the embodiment according to Fig. 3, the big young pathbreaker of resonance frequency is 900MHz and 1800MHz, and in the embodiment according to Fig. 4, the big young pathbreaker of resonance frequency is 800MHz and 1900MHz (ratio of these figure is 1: 1).The higher level of higher resonant frequency is because the height of the helix among Fig. 4 provides height among the embodiment less than Fig. 3 a little.In addition, this resonance frequency will be subjected to the influence of the plastic material in the carrier 4 naturally, still, also is subjected to the influence of the material of core segment 3 and protection outer cover 11 certainly.Influence from these plastic materials makes resonance frequency descend to some extent.

Because greater than the surface area that is provided among the embodiment according to Fig. 3, can expect has higher efficient according to the embodiment of Fig. 4 according to the surface area of the radiated element among the embodiment of Fig. 4.

Fig. 5 has shown an improvement embodiment according to the radiated element of Fig. 3.The difference of these two embodiment is, in the embodiment of Fig. 5, has increased a short circuit 19, i.e. conductor part, this conductor part interconnect be included in this radiated element two next-door neighbour's conductor parts mutually.

Short circuit part 19 in radiated element 15 can not influence higher resonance frequency significantly, but is used to the resonance frequency in the Hyporesonance frequency band is finely tuned.Short circuit is outer more in helix, and promptly with the angle of electricity, the position of short circuit is compared with the situation that does not have short circuit 19 the closer to power pack 13, and the resonance frequency in low-frequency band will be high more.On the contrary, if the center of the more close radiated element 15 in the position of short circuit 19, the resonance frequency in low-frequency band will be lower.Under extreme case, along with the position that short circuit 19 is moved to the most inside, to compare with the identical radiated element that does not have short circuit, the difference of resonance frequency will be close to zero.Like this, if determine according to the corresponding normal band that is fit to of the size of the radiated element of Fig. 3, so after the assembling of finishing core segment 3 and protection outer cover 11 being provided, the frequency of resonance takes place element may be too low.Just can place a short circuit 19 then, the minimizing of above-mentioned resonance frequency is compensated along helix.

Another is present in such fact to adopting short circuit 19 favourable arguments, and promptly the external dimensions of antenna has determined its aperture.This means and adopt big external dimensions that promptly adopt horn shape helix bigger total " conductor length ", its low-frequency resonance frequency can become too low.By adopting short circuit 19, the low-frequency resonance frequency may on move on to right value, also kept identical external dimensions simultaneously, and kept the aperture constant thus.

Have among the embodiment of short circuit 19 in a helix, that part of helix that is positioned at short circuit inside can be considered to be positioned at the helical end load partly of short circuit outside.

The difference of the embodiment of Fig. 5 and the embodiment of Fig. 3 is to provide a blind conductor part 20.This blind conductor part 20 is arranged in the end of the outmost vertical conductor 17 of radiated element 15, deviates from mutually with power pack 13, and meets at right angles basically with the first vertical conductor part 17, thereby can regard the prolongation of the first horizontal conductor part 18 as.The effect of blind, outstanding conductor part 20 is to make the resonance in the high frequency band to realize optimization, and when resonance was exaggerated, bandwidth also obtained increasing, even can reach the degree that covers DCS-and two frequency bands of PCS-like this.The resonance of the existence of blind conductor part 20 in can the appreciable impact low-frequency band.

Perhaps, can be considered as independent radiated element in the high frequency band with being in outmost vertical conductor part 17 between power pack 13 and the blind conductor part 20.In this case, blind conductor part 20 (perhaps with helix itself) has constituted the end load of radiated element in high frequency band.

Perhaps, the first vertical conductor part 17 and outstanding conductor part 20 can be thought the snail line of a horn shape, this helix is less than a circle, is approximately half-turn in Fig. 5.

The embodiment of Fig. 6 is different from the embodiment of Fig. 4, and it is more higher a little and narrower than the helix of the embodiment that provides among Fig. 4 that its difference mainly is its helix.In addition, also has a homologue as the short circuit 19 according to the embodiment that Fig. 5 provided.

An outer conductor portion 16 that is included in the radiated element 15 is connected in power pack 13 and blind conductor part 21.In this embodiment, blind conductor part 21 is endowed a kind of shape that is less than " square, the snail line " of a circle a little.In theory, this is corresponding with " helical antenna " that be set at high frequency band.Perhaps can believe that blind conductor part 21 is similar to above-mentioned blind conductor part 20.

The difference of the embodiment of Fig. 7 and the embodiment of Fig. 4 is that existing short circuit 19 also has blind conductor part 20.Yet in the figure, short circuit mutually combines three conductor parts and is integral.

In the embodiment according to Fig. 8, blind conductor part 21 is connected to horn shape helix half-turn part inwardly, and promptly after the second straight conductor part 16, this straight conductor part 16 is the first horizontal conductor part at this.Blind conductor part 21 is L shaped and is connected on the periphery of helix, it extends along the first horizontal conductor part 16 like this, around the bight 18 between this first horizontal conductor part and the first vertical conductor part 17, and partly extend along this first vertical conductor at least in part.

A short circuit 19 is arranged in this embodiment equally, and this short circuit is placed in the position at the most close helix center.

Description to alternative plan

In aforementioned, supposed that short circuit 19 is to be arranged on the carrier 4, with the same sides of all other conductor parts, and the hypothesis short circuit comprises the metal level identical with other conductor part on this carrier.Yet, the also short circuit that may adopt the capacitive character short circuit rather than conduct, under this occasion, the capacitive character short circuit is placed in a side opposite on the carrier 4.

Capacitive character short circuit 19 also can be placed on the carrier 4, with straight conductor part 16,16 ' 16 " ... 17,17 ', 17 " on the same side of carrier 4, between the mutual close conductor part in the zone of this capacitive character short circuit 19, leave very little gap mutually, so just realized the capacitive character short circuit.

In the alternative plan of short circuit 19, those parts that are positioned at the radiated element 15 of short circuit inside are endowed the configuration that is different from helix.Radiated element is positioned at the part of short circuit 19, and role is equivalent to the end load of radiated element in low-frequency band under this occasion.

That part of horn shape helix that is positioned at short circuit 19 also can omit.

It is how externally to reel and wrap up around core or body part 3 that carrier 4 has been described in the front.As a kind of alternative plan, carrier 4 also can be arranged on the inside of the chamber or the recess of core segment with the state that more or less wraps up.This chamber can be shapes such as cylinder, circular cone, and has the cross section of circle, avette, oval or other profile.

In another embodiment of the present invention, carrier 4 is the plane as shown in the figure like that.In this alternative plan, carrier 4 be fixed on the core segment of plane or even be fixed on the inboard of outer cover, this outer cover is arranged on the mobile phone.

In an alternative plan of telescopic rod-like device, adopted the rod-like device that regular length is arranged.When carrying out the resonance of λ/2 and λ/4 respectively in high and low-frequency band, this scheme is good especially.At last, also can adopt a kind of spiral rod-like device.

Claims

1. antenna assembly that is used for several frequency bands, this device comprises that is launched and be first element of rod-like device (22) in several frequency bands, second element (15) of in several frequency bands, launching, this second element has a pattern that is arranged on the conductor part on the carrier of being made by insulating material (4), it is characterized in that: the pattern of this conductor part forms one and is essentially the spirality plane, horn shape, this helix have a plurality of mutual electric connections, basically straight conductor part (16,16 ', 16 " ... 17,17 ', 17 " ...); And this rod-like device (22) is set to combine with carrier (4), and thus by non-power supply in electrical contact.

2. antenna assembly according to claim 1 is characterized in that, carrier (4) is rolled into tubulose or passage shape.

3. antenna assembly according to claim 2 is characterized in that, the carrier that winds up (4) has an axial aperture or groove; This carrier has the conductor part that combines with edge (26,27), and these edges meet along this perforate or groove; And rod-like device (22) extends axially in the zone of perforate or groove.

4. antenna assembly according to claim 3 is characterized in that, rod-like device (22) moves inward towards the inside of the carrier that winds up (4).

5. according to the antenna assembly of claim 3, it is characterized in that this rod-like device (22) outwards moves from the inside of the carrier (4) that winds up.

6. according to any one described antenna assembly in the claim 1 to 5, it is characterized in that second radiated element (15) is connected at least one wireless set of antenna place equipment with conducting.

7. according to any one described antenna assembly in the claim 1 to 6, it is characterized in that, the horn shape helix is powered at its periphery.

8. according to any one described antenna assembly in the claim 1 to 7, it is characterized in that two adjacent conductor parts in the horn shape helix are interconnected (19).

9. according to any one described antenna assembly in the claim 1 to 8, it is characterized in that, a free-ended conductor part (20,21) be connected to external conductor part in the horn shape helix (16,16 ', 16 " ... 17,17 ', 17 " ...) on.