CN1064181C

CN1064181C - Method and apparatus for multi-position antenna

Info

Publication number: CN1064181C
Application number: CN95108984A
Authority: CN
Inventors: 詹姆斯·P·菲利普
Original assignee: Motorola Inc
Current assignee: Motorola Mobility LLC
Priority date: 1994-07-21
Filing date: 1995-07-19
Publication date: 2001-04-04
Anticipated expiration: 2015-07-19
Also published as: GB2292258A; BR9502395A; SG52158A1; DE19526581C2; GB9514626D0; CA2153541A1; DE19526581A1; JP3662978B2; GB2292258B; CA2153541C; JPH0856109A; CN1122056A

Abstract

An antenna system includes a first antenna (107) positioned on a first device housing portion (103) and a parasitic radiator (108) positioned on a second device housing (102). The housings move relative to one another to collapse the device during a standby mode and extend the device during an active communication mode. The first antenna (107) and the parasitic radiator (108) are positioned on their respective housings such that they are parasitically coupled when the housings are collapsed and are not coupled when the housings are extended.

Description

The method and apparatus that is used for multi-position antenna

The invention belongs to the antenna of communicator.

Radio communication equipment comprises a transmitter that is connected with antenna and/or receiver, and this antenna is used for emission and/or detects radio frequency signals.This equipment can comprise and is used for input audio signal to a microphone of transmitter or be used to export the loud speaker of the signal that is received by receiver.The example of this Wireless Telecom Equipment comprises one way radio equipment, twoway radio, radiophone, personal communication devices and various miscellaneous equipment.These communication equipments typically have standby shape, and wherein this equipment is retracted so that preserve, and have the work shape of communicating by letter, and wherein this antenna is stretched so that optimize performance.

For radiophone and twoway radio, wish that typically these equipment have little size during standby mode so that its storage and transport.For example, the user to prefer radiophone enough little so that be placed in shirt or the jacket pocket when standby mode.At the work communications status, wish that this equipment is sufficiently long close with the ear of locating this loud speaker and user, microphone is near user's mouth and the health that antenna leaves the user.For satisfying these requirements, the radiophone shell can change profile, so that little in the size of work communication mode at the standby mode ratio.

It is all to provide the high performance antenna system at standby mode and work communication mode that prior art can change the difficulty that the communication equipment of profile runs into, above-mentioned communication equipment such as radiophone that must the receipt of call notification signal at standby mode.Though the aerial position that stretches can be optimized antenna performance, make this communication equipment size minimum at the punctured position of standby mode antenna, cause the reduction of antenna performance.

An example that comprises a plurality of positions antenna wireless communication device is the radiophone that comprises body and flap, and wherein this flap comprises the superincumbent antenna of installation.When closure, this flap covers this wireless telephone keypad and small-sized shell is provided.When flap was opened, the flap antenna left the phone body that the user keeps.Though the flap antenna performance is fine when flap is opened, is not placed ideally at this flap antenna of standby mode and to be used at standby mode reception notification signal.

Therefore, wish when this communication equipment stretching, extension of work communication mode and when the antenna system with high performance nature is provided when this communication equipment of spare mode is folding.

Fig. 1 is the front view of expression according to the radiophone of the stretching, extension that the present invention includes an antenna system;

Fig. 2 is that expression is according to the front view of Fig. 1 at the folding radiophone of standby shape;

Fig. 3 is expression comprises the radiophone enclosure of a transceiver according to Fig. 1 a partial view;

Fig. 4 removes fore shell part and the plane graph of flap of the radiophone of first antenna is shown according to Fig. 1;

Fig. 5 is the partial view of a part of radio telephone fuselage fore shell partial interior that the part of parasitic radiation body is shown according to Fig. 1;

Fig. 6 is the top view of expression according to the parasitic radiation body of Fig. 5;

Fig. 7 is the top view of expression according to the alternative embodiment of the parasitic radiation body of Fig. 6; With

Fig. 8 is expression another interchangeable embodiment according to Fig. 6 parasitic radiation body antenna.

The present invention is embodied in the multi-position antenna system of the equipment that comprises a shell, and this shell has first and second enclosure location, and they change the position between first extended position and second folding position.Circuit is placed in this shell so that transmitt or receive signal.First antenna is supported on first housing parts and is received this circuit.A parasitic radiation body is supported on second housing parts.First antenna and parasitic radiation body coupling when shell is in the folding position, and they are not coupled when shell is in extended position.The work communication period when shell be when stretching and when first antenna and parasitic radiation body be to be coupled and this shell is in when folding, this antenna system has high performance nature.

Begin note that at those parts shown in the above accompanying drawing and in institute's drawings attached, have identical last double figures.But the accompanying drawing that first bit representation is related has first 1 as the parts in Fig. 1, has first 2 at the parts of Fig. 2, or the like.It shall yet further be noted that antenna system according to the present invention is shown in the radiophone that comprises flap 103 (Fig. 1), wherein present invention advantageous particularly.But the present invention also can be advantageously used in the miscellaneous equipment, as unidirectional and twoway radio, perhaps adopts any other communication equipment of antenna.Therefore used here " equipment " and " device " refers to all this equipment and equivalents thereof.

Fig. 1 illustrates and forms radiophone 100 of the present invention.This radiophone comprises the shell 102 that contains first housing parts 101 and second housing parts 103.In an illustrated embodiment, first housing parts 101 is radiophone bodies, and second housing parts is a flap that can pivotally connect this body.Flap 103 is in work activity between extended position shown in Figure 1 and the standby mode folding or make position shown in Figure 2 during the communication mode.

Body housing parts 104 and a preceding body housing parts 105 after first housing parts 101 comprises one, their interconnection are to limit the internal volume of dress electronic circuit (not shown).Keyboard 106 is placed in first housing parts 101, so that the key 109 relevant with this keyboard (only a part is wherein numbered) is to manually start access by the user.Flap 103 shown in when closure is overlay keyboard 106 at least in part.This flap can be a little greatly so that cover all keys.When flap was closed, this flap prevented the startup of the key that covered.In addition, this flap can make this telephone set be in standby mode when closure.

Flap 103 comprises first antenna 107, is called the flap antenna here.Before being placed on, the flap antenna between flap housing parts 111 and the back flap housing parts 112, therefore in Fig. 1, is represented by dotted lines.Preceding flap and back flap housing parts 111 and 112 generally are flat components, their available suitable polymers manufacturings.The flap antenna clip is between these parts.When flap 103 was opened, the flap antenna was in the position of stretching, extension.When flap 203 (Fig. 2) was closed, this flap antenna was in position folding or that pack up.

First housing parts 101 comprises the parasitic radiation body or second antenna 108.Parasitic radiation body 108 is fixed on the inside of procapsid part 105, therefore is represented by dotted lines in Fig. 1.

Transceiver circuitry 315 usually is illustrated among Fig. 3.This transceiver can use any suitable conventional transceiver to realize.Transceiver circuitry 315 is placed in the part 301 of first housing with conventional method, as is installed on the printed circuit board (PCB), this circuit board group be contained in preceding and back body housing parts 104,105 between.Transceiver circuitry 315 is coupled to a microphone (not shown) and is placed on receiver (not shown) in the part 301 of first housing.This transceiver circuitry is also received elastomeric connector 316 or other device, and this connector is connected to a flexible conductor 317.This flexible conductor 317 extends to a hinge component 318 that comprises hinge joint 319.As shown in Figure 4, hinge component 418 also is included in the hinge joint 420 on the flap 403 so that mesh hinge joint 319.Flexible conductor ＇ 417 also receives first antenna 407 by hinge component 418.Provide the hinge component that is connected between flap antenna 407 and the transceiver can have any suitable structure, such as disclosed hinge in the United States Patent (USP) 5469177 that licenses to people such as Tanya Rush November 21 nineteen ninety-five, it is for reference to quote the disclosure here.

Flap antenna 407 (Fig. 4) comprises two

conductors

423 and 424 that are contained on the plate 425, makes that this antenna general appearance is an E shape.The flap antenna is made as two copper book bands by suitable conductor.Flap antenna 407 comprises a linkage section 422, is electrically connected the middle finger section 426 of

conductor

423 and 424 with flexible conductor 417.Middle finger section 426 comprises the line transformer 427 that impedance matching between antenna 407 and the receiving and transmitting signal machine circuit 315 (Fig. 3) is provided.The crossbeam 428 of conductor 423 connects middle finger section 426 to referring to 429 outward.Refer to that outward 429 general ends from crossbeam 428 vertically extend.Conductor 424 comprises a middle finger section 426 receiving crossbeam 430 similarly.The middle finger section of crossbeam 430 bonding conductors 424 is to referring to 431 outward, and it is generally perpendicular to crossbeam 430 and extends.Unit 432 (only wherein some indicate number) generally vertically stretches and provides the capacitive load of permission shortening antenna 407 from

outer finger

429 and 431, be convenient at the flap mounted antennas.Provide and refer to that outside each 429,431 openings that cut down 433 are to lay corresponding magnet (not shown).This magnet starts the reed switch (not shown) in first housing parts 101.Reed switch and magnet is not narration in more detail here, because they are not to constitute a part of the present invention.

Therefore flap antenna 407 is the dipole antennas that approach, and it is sandwiched between front casing part 111 and the rear casing part 112, so that constitute a thin flap.As shown in Figure 1, when this flap was opened, this antenna was the half-wavelength antenna with high

performance nature.Conductor

423 and 424

crossbeam

428 and 430 are big current segments of flap antenna.

Parasitic radiation body 508 is shown among Fig. 5.The parasitic radiation body directly is not coupled to the feeder line 317 (Fig. 3) of flap antenna 407,417 (Fig. 4).Parasitic radiation body general appearance is the U type, comprises being generally perpendicular to the

arm

534 and 536 that shoulder 535 stretches.Elbow 537 relative arms 534 stretch to be connected these parts with about 45 degree with shoulder 535.Elbow 538 extends to be connected these parts with shoulder 535 about 45s with relative arm 536.This parasitic radiation body have as one side by any suitable electric conductor glue book, the manufacturing of elasticity copper strips.

The parasitic radiation body is according to transceiver signal frequency sizing.More particularly, the longitudinal axis of arm 534 has length A, and the longitudinal axis of elbow 537 has length B, and the longitudinal axis of shoulder 535 has length C, and the longitudinal axis of elbow 538 has length D, and the longitudinal axis of arm 536 has length E.Length A, B, C, D and E they and half of the wavelength that approximates the transceiver signal frequency.

Be connected to the inner surface 640 of procapsid part 605 according to the parasitic radiation body 608 (Fig. 6) of preferred embodiment.Procapsid partly comprises flat front end 642 and sidewall 643.Relative sidewall 144 is not shown in Fig. 6, but can see from Fig. 1 that it is parallel with inwall 643.Use suitable bonding parasitic radiation body 608 to be assemblied in the inner surface 640 of procapsid part 605.The parasitic radiation body is flexible, and the surface 640 of it and procapsid part matches when enclosing.Specifically, the shoulder 635 of parasitic radiation body 608 is fixed to the inner surface 640 between the two row openings 660, and the key 109 (Fig. 1) of keyboard 106 puts in these openings.The shoulder of parasitic radiation body 608 is narrow, it be contained in closely two the row openings in and do not stretch in these openings, to avoid interference the operation of key 109.Shoulder 637 is contained in inner surface 640 so that it from antetheca 642 to sidewall 643 one-tenth curves.Use adhesive that arm 634 is fixed to arm 643.Use adhesive that arm 634 is fixed to wall 643, so that it stretches along this sidewall.Most preferred wall 643 is flat, so that arm 634 stretches on the monoplane.Arm 536 and shoulder 538 are received sidewall 144 similarly.In this method, thin elastic webbing is fixed on the inboard of procapsid part, the precalculated position of crossbeam 428,430 is such: these crossbeams are placed on the surface of antetheca 642, antetheca 642 is between two row openings 660, and the shoulder 535 of parasitic radiation body is received these openings when flap is closed.Like this, when flap was closed, crossbeam 428,430 and shoulder alignd and are adjacent to placement each other, as arrow representative among Fig. 1.Crossbeam 428,430 and take on 535 thickness and be separated with the procapsid part of the flap 103 procapsids parts and first housing parts 101.In addition, the shoulder 535 of parasitic radiation body is coupled to crossbeam 428,430 perceptually, and they are big current segments of flap antenna.Because when flap is closed, shoulder 535 is coupled to

crossbeam

430 and 428, and

arm

534 and 536 forms second dipole antenna, and its parasitic couplings is to doublet 407.This coupling is inductive coupled.

At work, when flap was opened, flap antenna 107 (Fig. 1) left the parasitic radiation body 108 and first housing parts 101, so that this antenna has high performance nature and the not circuit from user, first housing parts or first housing section interference of assigning to.In this position, the big current segment of flap antenna 107 (crossbeam 428,430) is the shoulder 635 away from parasitic radiation body 108, and this parasitic radiation body is not coupled to antenna 107 like this, and is not coupled to transceiver circuitry 315.When flap was closed, as shown in Figure 2, the flap antenna was converted to a position near the circuit in this first housing parts and the shell.This has reduced the performance of antenna 107, because shell 102 is in the near field volume of flap antenna.But the big current segment 428,430 of flap antenna 407 is positioned near shoulder 635, such two antenna parasitic couplings.Therefore the antenna system performance characteristics is subjected to the two influence of parasitic radiation body 108 and flap antenna 107 when flap is closed.When body is in the volume of near field the parasitic radiation body be tuned to the signal of communication wavelength of transceiver circuitry 315, and when flap is closed flap antenna 107 be tuned to the communication wavelengths of transceiver circuitry 315.Therefore when flap is opened one of antenna be tuned to transceiver communication signal frequency and when the flap closure another antenna be tuned to the communication signal frequency of transceiver circuitry.This coupling of antenna 107 and parasitic radiation body has improved the characteristic of antenna system significantly when flap is closed, and making does not have because the folded antenna telephone set is preserved the obvious reduction of the antenna performance of generation.Therefore, the flap antenna does not influence the ability that radiophone receives incoming call notification signal, paging information or electronic mail signal.

According to an interchangeable embodiment of parasitic radiation body 708,735 elbow 738 and elbow 737 are to have crooked outer peripheral 90 degree turnings to the base for link arm 734 and arm 736 respectively.The length H sum of the length G on the length F of arm 734, base 735 and arm 736 is about half of transceiver operating frequency wavelength.The embodiment of Fig. 5 is preferred, because if the total length of antenna when identical when this two antenna embodiment is quarter-wave aerial (, if), it is more farther than the end 755,756 of arm 734,736 that the end 555,556 of arm 534,536 leaves shoulder 535.

Another alternative embodiment of parasitic radiation body 808 is shown among Fig. 8.Parasitic radiation body 808 is included in the recess 858 in arm 834 and 836.Provide the recess 858 in this arm so that locate this arm around the outwardly directed jut of procapsid part 605.If the inner surface of procapsid part has a large amount of juts is to wish especially.Wish that arm 834,836 stretches so that optimize antenna performance in single plane.This is a particular importance, because this circuit location in parasitic radiation body 508 contiguous first housing parts 101 will influence the performance of antenna system unfriendly.But the shortcoming of Fig. 8 embodiment is: further shortened by other recess from terminal 855,856 distances to shoulder 835.

Therefore, can see that disclosed improved antenna system is used to have the communication equipment of removable body part.When antenna is opened and when this equipment is folding when being convenient to preserve, antenna system provides high performance nature.

Claims

1. the multi-position antenna system that is used for radio communication device (100), comprise a shell (101), this shell has first housing parts (102,103) and second housing parts (102,103), this two housing parts interconnects versatilely, movable toward each other between folding position and extended position, with be positioned in this shell through the transceiver of antenna system transmitt or receive signal, this antenna system comprises:

Be fixed on first antenna (107) in first housing parts, first antenna comprises feeder line (317,417) and is connected with transceiver in the folding position, first antenna be tuned to the signal that communicates by transceiver; With

Be fixed on the parasitic radiation body (108) in second housing parts, this parasitic radiation body wavelength of the signal by transceiver communication relatively is tuning, and directly be not coupled to transceiver, wherein this parasitic radiation body is coupled to first antenna when this shell is in the folding position, and this parasitic radiation body is coupled to transceiver in first housing parts by first antenna when this shell is in the folding position.

2. according to the multi-position antenna device of claim 1, wherein this equipment comprises that an interconnect hinge component (318,418) and first antenna of first and second housing parts of pivotally is coupled to this telecommunication circuit by this hinge component.

3. according to the multi-position antenna device of claim 1, wherein first antenna comprises two conductors (423,424), and they are placed on first housing parts.

4. according to the multi-position antenna device of claim 1, wherein first antenna is a half-wavelength antenna.

5. according to the multi-position antenna device of claim 4, wherein this parasitic radiation body is a half-wavelength.

6. according to the multi-position antenna device of claim 1, wherein first antenna is a dipole antenna.

7. according to the multi-position antenna device of claim 1, wherein first antenna is connected to transceiver when being in position stretching, extension and folding.

8. the multi-position antenna device that is used for radio communication device (100), comprise a shell (101), this shell has first housing parts (102,103) and second housing parts (102,103), this two housing parts interconnects versatilely, movable toward each other between folding position and extended position, with the transceiver (315) that is positioned at process antenna system transmitt or receive signal in one of first and second housing parts, this antenna system comprises:

Be fixed on first antenna (107) in second housing parts, first antenna is coupled to transceiver in extended position with in the folding position, wherein first antenna comprises two conductors (423,424), each conductor is installed in second housing parts, and comprises middle finger section to of connection crossbeam (428,430) that refers to outward; With

Be fixed on a parasitic radiation body (108) of first housing parts, this parasitic radiation body is coupled to first antenna when this shell is in the folding position, and this parasitic radiation body is not coupled to first antenna when this shell is in extended position.

9. multi-position antenna device according to Claim 8, wherein this parasitic radiation body generally is the U type, comprises from outstanding two arms (555,556) of a shoulder (535).

10. according to the multi-position antenna device of claim 10, wherein when first and second enclosure location are in folding position thereby first antenna and the coupling of this parasitic radiation body, this crossbeam (428,430) and this shoulder (535) placement closer to each other.