CN1299525A - Uniplanar dual strip antenna - Google Patents

Uniplanar dual strip antenna Download PDF

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Publication number
CN1299525A
CN1299525A CN99805360A CN99805360A CN1299525A CN 1299525 A CN1299525 A CN 1299525A CN 99805360 A CN99805360 A CN 99805360A CN 99805360 A CN99805360 A CN 99805360A CN 1299525 A CN1299525 A CN 1299525A
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China
Prior art keywords
antenna
isoplanar
band
shape antenna
length
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Granted
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CN99805360A
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CN1186852C (en
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A·特朗
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Qualcomm Inc
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Qualcomm Inc
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Priority claimed from US09/252,732 external-priority patent/US6259407B1/en
Publication of CN1299525A publication Critical patent/CN1299525A/en
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Publication of CN1186852C publication Critical patent/CN1186852C/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0471—Non-planar, stepped or wedge-shaped patch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/065—Microstrip dipole antennas

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

A uniplanar dual strip antenna (400) that has a two-dimensional structure. The antenna is comprised of a first and a second metallic strip (404, 408), each printed or etched on a thin planar dielectric substrate (412). The first and second strips (404, 408) are separated by a predetermined gap (T) and are used as conductors of a two-wire transmission line. A coplanar waveguide (416, 1520) is coupled to the uniplanar dual strip antenna (400). The coplanar waveguide (416, 1520) is constructed by printing or etching metal on the dielectric substrate. The positive terminal (420, 1522) of the waveguide is electrically connected to the first strip. The negative terminal (424, 428) of the waveguide is electrically connected to both the first and second strips. The uniplanar dual strip antenna (400) according to the present invention provides an increase in bandwidth over typical quarter wavelength or half wavelength patch antennas. Experimental results have shown that the uniplanar dual strip antenna (400) has a bandwidth of approximately 8 - 20 % that is extremely desirable for PCs and cellular phones.

Description

Uniplanar dual strip antenna
Background of invention
I. invention field
The present invention relates generally to antenna, relates in particular to single face biobelt shape multifrequency antenna.The invention still further relates to the inside antenna that is used for wireless device, this antenna has improved bandwidth and radiation characteristic especially.
II. the description of association area
Antenna is the critical elements of radio communication device and system.Although antenna has various shapes and size, each antenna all comes work according to identical basic electromagnetic principle.Transition region between the ripple in the structure of antenna and keying wave and the free space is relevant, vice versa.On total principle, the keying wave of propagating along open transmission line is the ripple of radiation in a kind of free space, is also referred to as electromagnetic wave.
In recent years, along with the personal radio communication device gets more and more with use mobile cellular personal communicator (PCS) phone as hand-held, people are to the suitable also increase thereupon of needs of the miniature antenna of some communicators like this that is used for.The development of integrated circuit and battery technology makes that the size and the weight of communicator reduce greatly in the past few years.Still a field that needs to reduce size is the communicator antenna.This is because the size of antenna plays an important role aspect the device size reducing.The size and dimension of antenna can influence the attractive in appearance and manufacturing cost of device in addition.
A radiating pattern that key factor is an antenna will considering when being designed for radio communication device.In normal circumstances, communicator must be able to communicate each other, or communicates with base station, center or satellite, and the orientation of these devices and this device has nothing in common with each other.Therefore, require the antenna of these radio communication devices to have the roughly radiating pattern of omnidirectional.
Another the important factor that must consider when being designed for radio communication device is the bandwidth of antenna.For example, wireless device, as be used for the phone of PCS communication system, and be used on the frequency band of 1.85-1.99GHz, requiring has 7.29 percent the dedicated bandwidth that has.The phone that is used for exemplary communications systems is worked on the frequency band of 824-894MHz, requires to have 8.14 percent bandwidth.Therefore, the antenna that is used on the radio communication device of these types must satisfy suitable bandwidth requirement when design, otherwise serious attenuation will take place signal of communication.
A kind of antenna commonly used is a telescopic antenna in the radio communication device, and this antenna is in time spent not easily in the retraction device.Yet telescopic antenna has several shortcomings.When pulling out use, telescopic antenna damages when go up on object, people or some surfaces because of striking through regular meeting, even also can damage when pinch in.Even consider to allow this telescopic antenna be telescopic so that during the damage that prevents to be mentioned in when design, also can influence the advanced person's of some part of communicator performance and circuit because of pinch in too much.When the amount of retraction during, also require to have minimum crust of the device size greater than desired amount.Although can make antenna have additional sleeve portion, to reduce the size of retraction, can influence attractive in appearancely usually, fragile more or unstable, perhaps the user uses inconvenience.
In addition, the radiating pattern of telescopic antenna is annular in itself, that is, shape ringwise, zero point is at center position.When the cell phone that adopts this antenna or other wireless device make antenna perpendicular to ground, that is, when becoming an angle of 90 degrees, has the central shaft of an angle of 90 degrees that also tilts this zero point with ground or with the horizontal plane of part.This can not influence the reception of signal usually, and this is because input signal is not limited to arrive with the angle that becomes 90 degree with respect to antenna.But the phone user makes cell phone tilt usually in use, thereby makes also run-off the straight of telescopic antenna.People also observe, and the cell phone user makes their phone with respect to local horizontal line inclination 30 degree (becoming 60 degree with vertical line) usually, makes telescopic antenna inclination 30 degree.This makes the zero center axle also be 30 degree angular orientations.Under this angle, hindered zero point to receive the input signal that arrives with 30 degree angles.Unfortunately, the input signal in the cellular communication system is normally with 30 degree angles or arrive in this angular range, thereby the possibility of the reception that hinders some signal zero point of misorientation is increased.
The antenna that another kind of type may be suitable for radio communication device is a conformal antenna.Usually, the surface configuration unanimity of conformal antenna installation conformal antenna provides very low radiation pattern (profile) usually.Conformal antenna has several types, as, plug-in type, microstrip-type and banded formula antenna.The microstrip-type antenna especially is applied in the personal communicator in recent years.
Represented such just as the meaning of term, microstrip antenna comprises plug-in type or microstrip-type element, and it also is referred to as radiation connector (radiator patch) usually.The length of microstrip element is with respect to wavelength X 0And it and resonance frequency f are set 0Relevant, interested frequency is satisfied in the selection of this frequency, as 800MHz or 1900MHz.The normally used length of microstrip element is half-wavelength (λ 0/ 2) and quarter-wave (λ 0/ 4).Although used the microstrip antenna of several types in the wireless communication system, there are several aspects to need further to improve.An aspect that needs further to improve is reducing of whole dimension.Another aspect that need improve is a bandwidth.Current plug-in type or microstrip-type Antenna Design are to obtain being used for the use desired 7.29 to 8.14 percent of Advanced Communications System or more bandwidth feature on actual size.
So, need a kind of new antenna structure and the new technology of manufacturing antenna, realize the bandwidth that adapts with advanced communication system.In addition, antenna structure should be suitable for inner the installation, and element location more flexibly is provided in wireless device, aesthetic property is improved greatly, and reduce the damage of antenna.
Summary of the invention
The present invention is a kind of Uniplanar dual strip antenna with two-dimensional structure.Uniplanar dual strip antenna comprises first and second metal tapes, and each metal tape is printed on the thin planar substrate.First metal tape and second metal tape are separated by predetermined groove or non-conducting material.According to the present invention, first and second metal tapes are as the conductor of two wires transmission line.The air between the metal tape on the substrate or the other materials of deposit are as the medium between first and second metal tapes.In one embodiment of the invention, the length of first metal tape is less than the length of second metal tape, and the width of first metal tape is less than the width of second metal tape.
Co-planar waveguide and Uniplanar dual strip antenna coupling.Co-planar waveguide constitutes by etching on substrate or depositing metal.The anode of waveguide links to each other with first metal is charged.The negative terminal of waveguide links to each other with first and second metals are charged.Coaxial cable can replace co-planar waveguide, as feed.
In an embodiment of the present invention, co-planar waveguide has two negative terminals and an anode.Anode links to each other with first metal tape.Negative terminal links to each other with second metal tape, and another negative terminal links to each other with first metal tape.Electricity is continuous mutually in convenience for negative terminal.
In an embodiment of the present invention, Uniplanar dual strip antenna forms by printing on thin flexible substrate, etching or depositing metal band.Co-planar waveguide also is etching or is deposited on the movable substrate.In another embodiment of the invention, Uniplanar dual strip antenna brings by etching or depositing metal on printed circuit (PC) plate and constructs.The manufacturing of this just big ambassador's biobelt shape antenna is simplified.
In an embodiment of the present invention, first and second metal tapes are approximate is parallel to each other.In an embodiment of the present invention, first metal tape and second metal tape are tubaeform open (flare out) when the conduction of ground roll together connecting place stretches out in its open end, so that the impedance matching with air or free space is improved.In another embodiment of the invention, first and second metal tapes are crooked substantially.Also can adopt first and second metal tapes of various other shapes.
Compare with the plug-in type antenna of typical 1/4th or 1/2nd wavelength according to Uniplanar dual strip antenna of the present invention, bandwidth strengthens.Experimental result shows that the bandwidth of Uniplanar dual strip antenna is approximately 8-20%, is quite superior for PCS and cell phone.
The accompanying drawing summary
The present invention is with reference to the similar description of accompanying drawing, and among the figure, the element of identical label is represented identical, intimate and/or structural similarity, the element that occurs first among the figure are with the numeral on the left side in the label, wherein:
Figure 1A and 1B are the portable phones of pull bar and spiral type outside antenna;
Fig. 2 is traditional little band plug-in type antenna;
Fig. 3 is the end view of little band plug-in type antenna shown in Figure 2;
Fig. 4 describes is Uniplanar dual strip antenna according to a kind of embodiment of the present invention;
Fig. 5 A-5G adopts square transition (square transition) vertical view of several embodiment of the present invention when coming bonding ribbon;
Fig. 6 A-6C adopts curve transition to come the vertical view of the other embodiments of the invention of bonding ribbon;
Fig. 7 A-7E adopts the V-arrangement transition to come the vertical view of the other embodiment of the present invention of bonding ribbon;
Fig. 8 A-8G adopts vertical views crooked, several embodiment of the invention at an angle and the hybrid metal belt shape;
The perspective view of several embodiment of the invention when Fig. 9 A-9B is some application;
Figure 10 is the frequency response that records that is suitable for the another kind of embodiment of the wireless telephonic the present invention of PCS;
What Figure 12 and Figure 13 described is the field pattern shape that records of an embodiment of the present invention;
Figure 14 is the vertical view of an embodiment of the present invention of using in Fig. 1 phone;
The vertical view of the another kind of embodiment of employed signal feed structure and the present invention in the phone of Figure 15 Fig. 1;
Figure 16 A and 16B describe is the upward view and the side cross-sectional views of an embodiment of the present invention of installing in Fig. 1 phone; And
What Figure 17 described is to adopt another kind of wireless device of the present invention.
The detailed description of preferred embodiment
1. description of the invention and discussion
Although traditional some feature of microstrip-type antenna processing and make and can be applied to personal communicator also needs to do further improvement aspect other of microstrip antenna, make to be more suitable for being used for radio communication device, as honeycomb and pcs telephone.A kind of such aspect is the improvement to its bandwidth.Usually, PCS and cell phone be approximate to need percent 8 bandwidth, so that operation can be carried out satisfactorily.Because the bandwidth of current existing microstrip-type antenna approximately drops in the scope of percent 1-2, thus require to increase its bandwidth, so that be more suitable for being used for PCS and cell phone.
Another aspect that is further improved is the size of microstrip-type antenna.For example, the microstrip-type antenna size reduces to make that to use the radio communication device of this antenna littler, more attractive in appearance.In fact, this in addition to judge whether such antenna can be used for radio communication device.Past, the reducing thickness that can be by reducing employed dielectric substrate or strengthen dielectric constant and realize of traditional microstrip-type antenna size.Yet this has the influence that does not require that reduces the beamwidth of antenna, thus the feasible radio communication device that not too is suitable for.
In addition, the field pattern shape of traditional microstrip-type antenna such as plug-in type radiator is normally directive.Most of plug-in type radiators only are being positioned at episphere with respect to antenna on the local horizontal direction.Just as former said such, this wants figure to move along with moving of device or rotation, and can produce the zero point that does not require in the area of coverage.So the microstrip-type antenna is not the many radio communication devices that are well suited for based on their radiating pattern.
The invention provides a kind of technical scheme that addresses the above problem with other problems.The present invention relates to a kind of Uniplanar dual strip antenna, it has a two-dimensional structure, and work the time is the open parallel-plate waveguide of a kind of end face, but conductor end (conductor termination) is asymmetric.Compare with other Antenna Design, the bandwidth of Uniplanar dual strip antenna strengthens, and size reduces, but has kept desired other features when using in the radio communication device.
Because Uniplanar dual strip antenna has two-dimensional structure, support so can be bonded on the various surfaces or identically, as the plastic casing of cell phone or other wireless devices by various surfaces.Isoplanar antenna can be installed near the end face of radio communication device or place, bottom surface, as the mobile phone place, also can be installed near other elements or in their back, in loud speaker, earphone, input/output circuitry, keyboard and wireless device.Isoplanar antenna can also be installed in the surface of the vehicle that uses radio communication device.
Different with rod-pulling type or external helicoid formula antenna is that Uniplanar dual strip antenna can not be damaged on object or surface because of collision.Simultaneously, because Uniplanar dual strip antenna can be installed in the end face place near radio communication device, or,, do not need bigger outer casing space to be used for the retraction of antenna so can not take the inner space that will be used for other characteristics and circuit along a side-walls yet.Antenna of the present invention can be made with the automatic process process, and has reduced labour and the cost relevant with antenna, and has increased reliability.In addition, the radiation of Uniplanar dual strip antenna makes it be suitable for many radio communication devices near omni-directional patterns.
2. typical environment
Before describing the present invention in detail, need to describe and to implement typical environment of the present invention.From wide significance, the present invention can implement in any wireless device, as personal communicator, radio telephone, radio modem, facsimile machine, mobile phone, beep-pager, message propagation receiver etc.A kind of such environment is as being used for the portable or hand-held radio phone of honeycomb, PCS or other commercial communication service.Various such radio telephones have corresponding different shell shape, and this is well known in the art.
What Figure 1A and 1B described is the typical radio telephone 100 that uses as in above-mentioned cellular system and the pcs system wireless communication system.(1A, 1B) radio telephone in has one " clam shell ", folded formation to Fig. 1, or turnover type (flip-type) telephony topology and make miniaturization.Other wireless device and phone adopt more traditional " rod " type shell or structure.
The phone of describing among Fig. 1 comprises rod-pulling type antenna 104 and helical antenna 106, and helical antenna 106 is concentric with pull bar, stretches out from shell 102.Shell front supporting loud speaker 110, display panel or display screen 112, keyboard 114, microphone or microphone insert hole 116, external power connector 118 and battery 120 among the figure, and they all are typical radio telephone elements, are well-known in the art.Among Figure 1B, antenna 104 is in the extended position that use runs into often, and in Figure 1A, antenna 104 is in the position (because of failing to see in the position of viewing angle) of retraction.This phone only is used for describing, and this is because there are various devices can adopt the present invention with phone and relevant physical structure.
As discussed above like that antenna 104 has several shortcomings, and shortcoming is when stretching out because of use and during retraction sometimes, owing to can damage when meeting other objects.But also occupy the inner space of phone, and taken the space of the element that is used for advanced feature and circuit, comprise power supply (as battery), and be restricted that flexibility is less.In addition, antenna 104 needs a minimum shell sizes, but this minimum dimension its size when the antenna retraction is also big as still can't to accept.Antenna 106 also can be met other object or surface in use, and can't retraction shell 102.
The present invention describes according to this environment of giving an example.According to describing so only is for clear and convenient.The present invention is not limited only to be applied to this environment of giving an example.After the description below having read, those of skill in the art can be well understood to how to apply the present invention to other environment.In fact, the reader will be well understood to, and the present invention can also be applied to any radio communication device, as (but being not limited to) portable facsimile printer or have the portable computer of wireless communication ability, or the like, these are further discussed following.
What Fig. 2 described is traditional little band patch antennas 200.Antenna 200 comprises microstrip element 204, base of dielectric 208, base plate 212 and distributing point 216.Microstrip element 204 (being also referred to as the radiation connector usually) and base plate 212 are all made by conductive material layer such as copper coin.
The most frequently used microstrip element and relevant base plate are made up of rectangular element, although also can adopt have other shapes as the microstrip element of circle and relevant base plate.Microstrip element can be made with various known technology, be included on the side of printed circuit board (PCB) to carry out photoetching, and on the opposite side of printed circuit board (PCB) or another layer photoetching one bottom surface.There are various other methods can be used for constructing microstrip element and bottom surface, for example,, plate are bonded on the base of dielectric, or on plastics, apply a kind of electric conducting material by depositing conductive material selectively in substrate.
Fig. 3 is the end view of traditional microstrip antenna 200.The coaxial cable that will have center conductor 220 and outer conductor 224 links to each other with antenna 200.Center conductor (anode) 220 links to each other with microstrip element 204 at distributing point 216 places.Outer conductor (negative terminal) 224 links to each other with bottom surface 212.The length of microstrip element 204 is usually under interested frequency, in base of dielectric 208, equal 1/2nd or 1/4th of wavelength and (see " antenna works handbook " second edition of Richard C.Johnson and Henry Jasik, the 7-2 page or leaf, and be with the statement of following relational expression the 7th chapter): L = 0.5 λ d = 0.5 λ 0 / ϵ r , or L = 0.25 λ d = 0.25 λ 0 / ϵ r Here, the length of L=microstrip element 204
The relative dielectric constant of ε=base of dielectric 208
λ 0Wavelength in the=free space
λ dWavelength in the=base of dielectric
Dielectric constant and feed variation inductance make and are difficult to estimate exactly size, thereby need usually to adopt testing element to determine length accurately.Thickness is more much smaller than wavelength usually, normally at 0.01 λ 0The order of magnitude, with so that transverse current or transverse mode be minimum or prevent its appearance.The value of t is carried out work according to antenna and is selected on great bandwidth, this will discuss in more detail afterwards.
The width of microstrip element 204 " ω " must be less than the wavelength in the dielectric base material, i.e. λ dThereby, can not inspire the more mould of high-order.An exception is to adopt many signal feed, the place of eliminating high-rder mode.
Second kind of microstrip antenna commonly used is the quarter-wave microstrip antenna.The bottom surface of quarter-wave microstrip antenna has the area bigger than microstrip element usually.Under the interested frequency, the length of microstrip element is about quarter-wave in base material.Under the interested frequency, the length on ground is about 1/2nd wavelength in base material.One end of microstrip element is electrically connected with ground.
The bandwidth of quarter-wave microstrip antenna depends on the thickness of base of dielectric.Just as previously pointed out, the operation of PCS and cellular radio requires to have percent 8 bandwidth.In order to make the quarter-wave microstrip antenna satisfy percent 8 bandwidth requirement, for cellular band (824-894MHz), the thickness of base of dielectric 208 must be about 1.25 inches, and for the PCS frequency band, is 0.5 inch.Very clear, big like this thickness is undesirable in small-sized radio communication device or personal communicator, at this moment, requires about 0.25 inch or littler thickness.Antenna with big thickness normally is not suitable for the existing volume of most of radio communication devices.
3. the present invention
The Uniplanar dual strip antenna 400 of constructing and operating according to one embodiment of the present of invention as shown in Figure 4.Among Fig. 4, Uniplanar dual strip antenna 400 comprises first ribbon 404 and second ribbon 408, base of dielectric 412 and co-planar waveguide 416.First metal tape 404 is electrically connected with second metal tape 408 at one end or near an end place.This end is called " closing end " 406, is used for antenna 400.
First and second metal tapes 404 and 408 are all through printing, etching or be deposited on the base of dielectric 412, and all be to make with electric conducting material such as copper, brass, aluminium, silver, gold or other known electric conducting materials, these materials have known impedance and current characteristic.First and second metal tapes 404 and 408 alternate predetermined clearance t are filled with dielectric material (being generally air) therebetween as required, as are used for the foam of this purposes.In an embodiment of the present invention, first and second metal tapes 404 and 408 are parallel to each other on each length substantially.(for example, see Fig. 5 A-5C and Fig. 9 B) in another kind of embodiment, first and second metal tapes are located tubaeform opening at a beginning, so that provide and air or free space better impedance matching.
Co-planar waveguide 416 and first, second metal tape 404 and 408 couplings that an anode 420 and two negative terminals 424 and 428 are arranged.In one embodiment of the invention, positive and negative end 420,424 and 428 is to be formed by three parallel metal tapes.Central metal tape is appointed as anode 420, and it is electrically connected with first metal tape 404.An outer metal tape is appointed as negative terminal 424, and another outer metal tape is appointed as negative terminal 428.Negative terminal 424 is electrically connected with first metal tape 404, and negative terminal 428 is electrically connected with second metal tape 408.In one embodiment of the invention, constitute co-planar waveguide 416 by printing on base of dielectric 412, etching or depositing metal.Co-planar waveguide 416 is to make with electric conducting material such as copper, silver, gold, aluminium or other known electric conducting materials.Coaxial cable also can be used for replacing co-planar waveguide, as feed.
Uniplanar dual strip antenna 400 is two-dimensional structure.So, can be bonded on many surfaces, on cellular plastic casing with integrating.In an embodiment of the present invention, antenna 400 is etchings, print or be deposited on the flexible sheet, flexible sheet can be used as base of dielectric or medium, as polyester resin film (Mylar), polyimide film (Kapton) or other known flexible dielectric materials.Biobelt shape antenna can be installed on the thin part of wireless device, as is installed on flip type, clam shell or the folded part of mobile phone, and this is discussed below.
The resonance frequency of the length major decision isoplanar biobelt shape antenna 400 of first metal tape and second metal tape 404 and 408.Make first and second metal tapes 404 and 408 have suitable length, thereby first and second metal tapes 404 and 408 are as the two-wire line that can receive and transmit the signal with pre-selected frequency.It is well-known in the art that thereby the length of selecting first and second metal tapes 404 and 408 is used as in the method that requires the two wires transmission line under the frequency.In brief, can be used as the two wires transmission line in order to make first and second metal tapes 404 and 408, each metal tape must have the length that is about λ/4, and here, λ is the wavelength under the interested electromagnetic frequency.Secondly, the bandwidth of the synthetic antenna of two wires transmission line formation increases.This is by length that reduces first metal tape simultaneously and width, increases the length and the width of second metal tape simultaneously, up to realizing desired bandwidth.
Co-planar waveguide 416 is with signal element (not shown) and 400 couplings of biobelt shape antenna.Notice that signal element refers to signal source and/or function that signal receiver had here.It still is that two functions depend on how antenna 400 works that signal element has one.For example, antenna can only be used as transmitting element, and at this moment, signal element is as signal source.Also can be that when antenna 400 only was used as receiving element, signal element was as signal receiver.When antenna 400 during not only as transmitting element but also as receiving element, signal element has two functions, is a transceiver.
Antenna or metal tape can form various other shapes, as (but being not limited to) quadrant shape, semicircle, half elliptic, parabola shaped, the circle that has a certain degree and square C shape the two in conjunction with, L shaped, U-shaped and V-arrangement.V-shaped structure can be less than 90 spend almost be 180 the degree.Curvilinear structures can be used quite little or sizable diameter.The conductor i.e. width of first and second metal tapes can change along its length, thereby they are circular cone, curve or step and are varied to narrower width towards the outer end.As known to the those of skill in the art, several effects or combination of shapes can be become a single antenna structure.
The several vertical views of other embodiment or the shape of metal tape of the present invention are shown in Fig. 5 A-5G, 6A-6C, 7A-7E and 8A-8F, and this is first metal tape or second metal tape for the last numeral of label, that is, be 4 or 8.Which width of cloth figure first digit and last symbolic representation element appear among, and for example, 504A represents it is Fig. 5 A, and 708B represents it is 7B, or the like.For describing for simplicity, the width of the metal tape that uses among these figure is out-of-proportion, and normally identical.Yet as top and later discussion, and this is clearly, and these two metal tapes have different width usually, to realize desired bandwidth.
What the antenna embodiment shown in Fig. 5 A-5G described is other shapes of the present invention, adopt rectangle or foursquare turnover metal tape is linked together.That is, for the closing end of antenna in Fig. 5 A-5G illustrated embodiment, first and second metal tapes are with being roughly (506A-506G) that straight conductor connecting element or turnover metal tape 506 link together.In addition, the further variation of the mutual direction of metal tape is finished with being roughly square corner.Each direction variation comprises navigating on the preceding part of each metal tape new portion that is roughly vertical or one-tenth an angle of 90 degrees.Certainly, it is very accurate that these angles need not to be under most of application scenarios, also can adopt other angle, curved as requested or chamfering.
Fig. 5 B illustrates, and in order to be suitable for the second longer metal tape, metal tape can be folded up, with the length of the whole requirement that keeps antenna structure.Shown in Fig. 5 C be folding can be plane toward or away from the first metal tape place.Shown in Fig. 5 D is second metal tape can be folded back, partly or entirely around first metal tape.And also be that first metal tape extends through foldable structure shown in Fig. 5 E.Shown in Fig. 5 F is first and second metal tapes are finished direction with littler " step " variation.In addition, the end of each metal tape can bending at an angle, shown in Fig. 5 G, form the Y shape of an integral body.Usually, the angle of separating is 90 degree, although this is not to be necessary, the end construction that just likes Y shape in obtuse angle also is an acceptable.
What the antenna embodiment shown in Fig. 6 A-6C described is another kind of shape of the present invention, and its adopts is curved turnover and metal tape is linked together.That is, in the embodiment shown in Fig. 6 A-6C, first and second metal tapes are to couple together with crooked conductor connecting element or turnover metal tape 606 at closing end.Metal tape 606 can have various shapes, includes, but is not limited to quadrant, semicircle, semiellipse or parabolical, or its combination.Warp architecture can adopt quite little or sizable radius according to specific application requirements.In addition, each metal tape can be folded up, maintenance is used for the length of the integral body requirement of antenna structure shown in Fig. 5 A-5G.Shown in Fig. 6 A is the overall semicircular turnover that is, shown in Fig. 6 B is totally to be quadrant or oval crooked turnover, and shown in Fig. 6 C is totally to be the crooked turnover of parabolical.The turnover of these types use that also can combine.
What the antenna embodiment shown in Fig. 7 A-7E described is to be used for other shapes of the present invention, employing be that V-arrangement turnover links together metal tape.That is, in the embodiment shown in Fig. 7 A-7E, first and second metal tapes are not adopt conductor connecting element separately or turnover metal tape or adopt very little element to couple together at closing end.But the extensibility of structure that first and second metal tapes outwards separate or expand outwardly with the end from a points of common connection.In addition, the same as before, each metal tape can be folded up, shown in Fig. 5 A-5H, keep the whole desired length of antenna structure.
Fig. 7 A and 7B illustrate and are straight V-arrangement usually or acutangulate turnover in the junction.Among Fig. 7 B, two metal tapes bend once more, and forming totally is parallel metal tape, the slope that perhaps mutual angulation reduces.Among Fig. 7 C-7E, at least one in two metal tapes is crooked after initial V-arrangement connects.Among Fig. 7 C, two metal tapes bend to curve, for example, follow index or parabolic curve function.Among Fig. 7 D, it is curved to have only a metal tape to be into, and in Fig. 7 E, two metal tapes all become curve, but is folded into straight portion.The same as before, these turnover types uses that also can combine are used for specific application as required.
That Fig. 8 A-8G describes is the figure of several embodiment of metal tape of the present invention or shape, adopts shaped form, is the metal tape of angle or combination.Here, metal tape is parallel substantially each other at length direction, but circular, spiral type or V-arrangement, from stretching out in the place that closing end connects with conductor connecting element or turnover metal tape 806 (806A-806F), perhaps under circular shown in Fig. 8 G or oval-shaped situation, do not use bonding ribbon.Adopt the mixing shape to make and on support base, form antenna structure, also support circuit or discrete element and device in the substrate, make that perhaps other devices in target wireiess device form clearance channel on every side.
And this antenna structure is a kind of two-dimensional structure that is positioned at single plane, makes to be a kind of conformal or structure that can be conformal, and is smooth thereby the plane needs not to be.That is, by making support base form curve or being certain shape, the shape of single face antenna can effectively change on the third dimension.Become on the two-dimensional directional flat surfaces the pair of metal band can upper edge one camber line becomes shaped form, or bending has a certain degree in the third dimension (being z here).Several embodiments of the present invention are shown in Fig. 9 A-9C, and the pair of metal band becomes curve or bending along the z direction.These embodiment require antenna is put into antenna " be suitable for " in the device around be of great use in some space of wireless device of some element or structure the time.
Shown in Fig. 9 A is the situation of first and second metal tapes seen among Fig. 4, and it also is to adopt simple curve to become curve shape along its length along three-dimensional.Shown in Fig. 9 B is the situation of first and second metal tapes seen among Fig. 7 A, and from three-dimensional, they link together, forming V-shape, or acute angle turnover, V-arrangement skew.More complicated collection of curves or the folding shape that is used for forming face, metal tape is positioned at this plane, shown in Fig. 9 C.
Biobelt shape antenna 400 can also at one end be electrically connected metal tape by etching or depositing metal band on two opposite sides of base of dielectric and with the passage, wire jumper, syndeton or the lead that apply.Adopt this form, antenna 400 adopts some base material as the base of dielectric between two metal tapes.With regard to the feature of bandwidth and other be well-known with regard to, this has considered such situation when Antenna Design.Biobelt shape antenna 400 can also be by with plastics or other known insulation or dielectric material is molded or become the supporting structure of the shape (U-shaped, V-arrangement or shaped form, rectangle etc.) with requirement and adopt known method to comprise with electric conducting material subsequently that the electric conducting material that is liquid condition applies on suitable part or plastic covering is constructed.
Base of dielectric can or be used for making the similar structures that forms in the material of shell with pillar, bulge, passage and be fixed in a part of wireless device shell.That is, such support is during fabrication for example by injection molding or be formed on the wall of device.These supporting members can remain on substrate on the fixing position when the substrate of phone assembly process is inserted subsequently.Other technologies comprise with one deck binding material assembly are fixed in the shell of device, or hole or edge in the fixture of certain form or clamping device and the substrate are fixed with each other.
As previously mentioned, according to the present invention, first and second metal tapes 404 and 408 (504,508; 604,608; 704,708; 804,808 etc.) with two wires transmission line mode work.An advantage of two wires transmission line is that it does not need ground level.This makes antenna 400 become the insignificant two-dimensional structure of a kind of thickness.The thickness of most of antennas 400 is to have the thickness of base of dielectric 412 to determine.For example, polyester resin film or the polyimide film thin slice of thickness in 0.0005 inch to 0.0002 inch scope can be used as base of dielectric.On the contrary, it is 1.25 inches base of dielectric that the traditional microstrip antenna that is designed for cellular band needs thickness, is 0.5 inch and the microstrip antenna that is designed for the PCS frequency band requires the thickness of base of dielectric.So, the invention enables the integral thickness of antenna to reduce greatly, thereby be more suitable for, as PCS or cell phone in personal communicator.Yet those of skill in the art will be understood that, also can adopt other thickness, comprise thicker material, make in use, or during making or be the wireless device viability, the desired structural intergrity of maintenance antenna.
Make that according to single face dual band antenna 400 of the present invention bandwidth strengthens on typical quarter-wave or 1/2nd wavelength plug-in type antennas.Experimental result shows, about percent 8-20 of the bandwidth of antenna 400, and this is extremely to be suitable for PCS and cellular.As previously mentioned, traditional microstrip antenna smaller bandwidth makes them not too be suitable for personal communicator.
Among the present invention, the increase of bandwidth mainly is by antenna 400 is realized with the mode of two wires transmission line rather than traditional little band plug-in type antenna.Different with the traditional little band plug-in type antenna with radiation connector and ground level is that in antenna 400, first and second metal tapes 404 and 408 are as active radiator.In other words, the length and the width of first and second metal tapes think over, thereby first and second metal tapes 404 and 408 are used as active radiator, and it is operated under interested wavelength or the frequency.At antenna 400 duration of works, respond to the generation surface current at first metal tape and in second metal tape.During beginning, the inventor selects suitable dimensions,, adopts the length and the width of first and second metal tapes of analytical method well known in the art and EM simulation softward that is.After, the inventor by method validation as known in the art analog result.
For the enhanced emitter or the beamwidth of antenna, the size of each metal tape is through selection in a preferred embodiment, and sets up the different center frequency that is mutually related with the method for preliminary election.For example, suppose f 0It is the desired centre frequency of antenna.Can select the length of short metal tape, make its centre frequency at f 0Near+Δ f place or its, and select the length of long metal tape, make its centre frequency at f 0Near-Δ f place or its.This just makes the bandwidth of antenna at 3 Δ f/f 0To 4 Δ f/f 0The order of magnitude on.That is, adopt with respect to f 0+/-frequency shift (FS) obtains such scheme, and strengthened the antenna radiator bandwidth.Adopt such structure, select Δ f, make its amplitude be far smaller than f 0(Δ f＜＜f 0).Thereby the resonance frequency of two metal tapes is less at interval.We think, if select Δ f and f 0When equally big, antenna will be worked unsatisfactorily.In other words, be not all right as dual band antenna and each metal tape as antenna radiator independently.
Among the present invention, the increase of bandwidth is to realize under the situation of the size that does not increase antenna.This principle with traditional plug-in type antenna is opposite, and in traditional plug-in type antenna, bandwidth normally increases by the thickness that increases the plug-in type antenna, thereby the overall dimensions of plug-in type antenna is bigger.
In the typical embodiment of the present invention, the size of antenna 400 is suitable for cellular band, that is, and and 824-894MHz.The size table 1 below that is used for the antenna 400 of cellular band provides.
Table 1
The length of first metal tape 404 (L1) 2.4 inch
The length of first metal tape 408 (L2) 4.53 inch
The width of first metal tape 404 (W1) 0.062 inch
The width of second metal tape 408 (W2) 0.125 inch
Gap (t) between first metal tape 404 and second metal tape 408 0.125 inch
In the above-described embodiments, adopt 1 ounce copper to construct first and second metal tapes 404 and 408, and adopt 0.031 inch thick FR4 (it is well-known being used for printed circuit board (PCB) (PCB) material on the market) as base of dielectric 412.And the anode of co-planar waveguide 416 is linking to each other with first metal tape 404 with the closing end of antenna 400 distance apart from 0.330 inch.
Shown in Figure 10 is antenna 400 sizes are suitable for a kind of embodiment of working under cellular band the frequency response that records.Shown in Figure 10 is that antenna has when 825MHz-frequency response of 15.01dB, and has when 895.0MHz-frequency response of 17.38dB.So antenna has 8.14 percent bandwidth.
In another routine embodiment of the present invention, making the size of antenna 400 be adapted at the PCS frequency band is work in the 1.85-1.99GHz.The size such as the following table 2 that are used for the antenna 400 of PCS frequency band provide.
Table 2
The length of first metal tape 404 (L1) 0.89 inch
The length of second metal tape 408 (L2) 2.10 inch
The width of first metal tape 404 (W1) 0.062 inch
The width of second metal tape 408 (W2) 0.125 inch
Gap (t) between first metal tape 404 and second metal tape 408 0.125 inch
In last routine embodiment, the copper that reuses 1 ounce is constructed first metal tape 404 and second metal tape 408, and is used as base of dielectric 412 with 0.031 inch thick FR4 (PCS material).And the anode of co-planar waveguide 416 links to each other with first metal tape 404 in the place of 0.2 inch of distance antenna 400 closing end.
Shown in Figure 11 is the size of antenna 400 is suitable for a kind of embodiment of working under the PCS frequency band the frequency response that records.Shown in Figure 11 is that antenna has when 1.79GHz-frequency response of 9.92dB, and has when 2.16GHz-frequency response of 10.18dB.So in this embodiment, antenna 400 has 18.8 percent bandwidth.
Shown in Figure 12 and 13 is the field distribution that records of 400 1 kinds of embodiment of antenna of working under the PCS frequency band.Specifically, shown in Figure 12 is map of magnitudes at azimuthal plane midfield figure, and shown in Figure 13 is map of magnitudes at elevation plane midfield figure.Dual band antenna shown in Figure 12 and Figure 13 has the radiation profiles that is approximately omnidirectional, thereby makes it to be suitable for use in the personal communicator.
A kind of embodiment adopts the radiator banded structure of " D " shape, and in this structure, second metal tape is more much longer than first metal tape, and is folded into " inwardly " extension usually, and leaves with first metal tape, even can be as required, and oneself is folded up.This antenna structure as shown in figure 14, among the figure, antenna 1400 is to form with the metal tape 1404 and 1408 that is positioned in the substrate 1412.The upper part of antenna is formed by conductive metal band 1404, among the figure, and slight curving one-tenth " C " shape (or leading edge portion of D).Its radius of curvature makes it possible to antenna 1400 is put into sidewall for crooked crust of the device and near its one side.Second metal tape is than the first metal bandwidth, and is as discussed above such, with the improvement bandwidth.
Construct a kind of like this model of antenna, and test, its overall dimensions is taken advantage of the order of magnitude of 51.89mm (X) at 37.59mm (Y), and is roughly corresponding with the inside dimension of position, the wireless telephonic upset of the clamshell style at antenna place top (flip-top).
Transceiver circuit suitable in antenna 1400 usefulness feed parts 1416 and the wireless device links to each other.Element 1420 illustrates, and various known circuit elements or device can also be installed in the substrate 1412, perhaps as required, forms passage or hole 1422, makes various elements or cable to pass through.
Can form a kind of preferred embodiment with a kind of radiator banded structure of D shape, in this structure, second metal tape is much more much longer, wide than first metal tape, and common " coiling " is around first metal tape.A kind of like this antenna structure as shown in figure 15, antenna 1500 is to form with the metal tape 1504 and 1508 that is positioned in the substrate 1512.Have, antenna 1500 upper parts that formed by second metal tape are slight curving again, make to improve the placement of antenna 1500 in wireless device.
Such antenna can form a kind of single structure with the conductor of feed signal.Coaxial feed can be formed in the same flexible substrate (1512), as the conductor that forms antenna.For example, on polyester, polyimides or polytetrafluoroethylmaterial material thin slice, all these are well-known in the art.An example has been shown among Figure 15, among the figure, has shown flexible signal feed structure of the length that is " co-planar waveguide " form or part 1520.Waveguide 1520 is cut off formula and is connected the negative feed metal tape 1524 and 1528 of forming a co-planar waveguide ground part part, and at one end is connected thereto.Feed metal tape 1524 connects or is coupled on the Connection Element 1506, and feed metal tape 1528 is connected to second metal tape 1508.Positive feed metal tape 1522, or the central authorities of feed structure 1520 are directly connected to first metal tape 1504.Select the tie point of this feed metal tape and the interval between the metal tape 1528, employed frequency and length and other size with according to electric conducting material 1506 provide predetermined impedance.
Positive feed 1522 shown in the figure has been cut off along the short distance of material 1512 directions, and is connected usually or is coupled or widens and become to conductor 1,524 three center conductor 1526 similar with 1528.Conductor 1526 extends to connector end 1530 along the length direction of material 1512, forms the center or the positive part of co-planar waveguide.
Yet, can also adopt other structure, comprise one or more feed metal tape conductor are placed on the opposite flank of substrate.For example, can on a side of material 1512, form positive feed-through, and on opposite side, form negative feed.Subsequently, conductor path is used for transmitting signal in suitable place by material.Other that also can adopt conductor and path make up the transmission that realizes signal, just as known to the people like that.
So antenna 1500 can form a single overall structure together with these conductors (1522,1524,1528), and make and be improved aspect cost, reliability and the manufacturing efficient.Be everlasting conducting strip or connector 1532 places of conductor dbus on the feed part 1520 cut off, and little connector 1532 be used for circuit board that antenna is coupled on various springs actions or the connector that loads be connected.
The structure of employed waveguide or feed part 1520 and substrate 1512 or global shape only are used to describe among Figure 15, and as shown in the figure, are used for being engaged in most effectively in the wireless device 100.Here, those of skill in the art will be understood that, also can adopt other structure, and this is also in principle according to the invention.For example, do not adopt here along waveguide 1520 length direction bendings, but adopt crooked, the folding or turnover of a series of 90 degree, as conductor into about miter angle.Very clear, when adopting little cable, can adopt various bendings and turnover.To make the path of conductor be minimum for folding and turnover with these, held the physical restriction that is added on substrate or the antenna and receive.In addition, conductor 1524,1526 and 1528 usually along on waveguide 1520 directions on one point or the narrowed width at multiple spot place, and its place can also be according to specific application change.The stingy bridge that is used for electric connecting conductor 1524 and 1528 shown in Figure 15 is useful, but is not of the presently claimed invention.
In the time of in placing wireless device such as radio telephone 100, feed structure or waveguide 1520 make it possible to carry out between the various receptions and transmitting element effective signal and transmit in antenna 1500 and wireless device.By in public still thin and flexible substrate, forming antenna and co-planar waveguide, antenna can be installed in the mass part of device, this be because its occupied space very little, and can be formed on many other discrete elements such as loud speaker around.Feed-through can form connect around flexible, rotation or folding hinge, as in many wireless devices (phone, computer).
In addition, replace waveguide (feed) 1520, can obtain similar result with tiny coaxial line.For example, a kind of coaxial line of known type or cable, it has the diameter of 0.8mm or 1.2mm, can be as required transmits signal between antenna 1500 and corresponding or suitable circuit.As everyone knows, the feature according to signal transmits in some applications, can adopt the conductor of other styles and type.
What Figure 16 A and 16B described respectively is side-looking and the rear elevational sectional view of a kind of embodiment of the present invention of installation in the phone 100 shown in Figure 1.This telephone set has various inner members, is bearing in usually on one or more circuit board, carries out various required or desired functions.In the shell 102 of circuit board 1602 in Figure 16 A and 16B, support various elements such as integrated circuit or chip 1604, discrete elements 1606 as resistance and electric capacity, and various connector 1608.Display screen and keyboard are installed in the reverse side of circuit board 1602 usually, with various elements such as battery or external power, loud speaker, microphone, or the circuit on various other similar well known elements and the circuit board 1602 couples together towards front wire jumper, lead and the connecting line (not shown) of telephone outer shell 102.
In this embodiment, drawer type or plug-in connector 1610 are installed in the downside of circuit board, near the front of telephone set, and are used for connecting the link of the loop part 1520 that is used for antenna 1500.In addition, also can adopt one or more known spring contacts or binding post that conducting strip 1530 is connected on the terminal 1530, and with antenna 1500 electric coupling or be connected on the circuit board 1602.Such spring contact or binding post be with known technology as welding or conduction bonding and be installed on the circuit board 1602, and be electrically connected on the suitable conductor, and between transmission that requires and receiving circuit, transmit signal.Yet, also can adopt other known interconnection techniques, comprise the employing welding compound, or adopt small-sized coaxial connector (when adopting little cable).As required, can also adopt special-purpose impedance matching element or circuit, be used in the wireless device feed structure is coupled together.
In the end view shown in Figure 16 B, comprise multilayer conductive material and dielectric material in the circuit board 1602, they bond together, and form multilayer circuit board or printed circuit board (PCB) (PCB) in the art.Such circuit board is well-known in the art.Shown in the figure is dielectric materials layer 1612, and it is near metal conducting layer 1614, and conductive layer 1614 sides are dielectric materials layers 1616, and dielectric materials layer 1616 supports again or close metal conducting layer 1618.The conductive channel (not shown) is used for each conductor on the different layers and the element on other aspects are coupled together.The figure that given layer is gone up etching determines the connected mode on this layer.Adopt this structure, aspect 1614 or 1618 can form ground plane or ground plane, is referred to as circuit board 1602, is well known in the art.
Usually, adopt various pillars, terminal or projection 1620 to be used for circuit board or element are installed in the enclosure.These can form the part as shell when forming by the injection molding plastics, or fix, and for example adopt bonding or other known structures to realize.In addition, also have one or more fastening binding posts 1622 usually, with the removable cover plate of fastening means fixed part such as shell 102.
Such as discussed, antenna 1500 can be with several known technology, and for example (but non-being confined to), binding agent, glue, adhesive tape, encapsulating material or binding material etc., and be fixed in the each several part of shell 102.For example, antenna 1500 can or be with 1630 with the tack coat that bonds in the substrate 1512, is bearing on the sidewall or other parts of wireless device element.Antenna normally is fixed on the sidewall of shell, preferably be fixed on the insulating material, or be fixed on the bearing assembly, and this bearing assembly can be installed with supporting member, screw or similar tightening member.
In the art, can also adopt other the installation or the structure of fixed antenna.For example, be used for making the projection that forms on the material of shell, passage etc. and can be used for fixing base material.Can adopt various projectioies or flange to support antenna, and, can take different shapes according to different application.
Shown in Figure 16 B, substrate 1512 can be curved, or crooked, and is suitable for the shape of shell, to hold other elements, feature or the assembly in the wireless device.Among the figure, loud speaker 1632 has antenna radiator, and perhaps a part is located the metal tape of " coiling " in addition around it.
Substrate can manufacture bending or folding shape, perhaps makes its distortion when mounted.Adopt thin substrate, make substrate can produce certain force of strain or pressure at the adjacently situated surfaces that has sometimes bending, and substrate is in place, and to need not to adopt securing member when mounted.Subsequently, the part of the substrate by neighboring devices, element or circuit board and cover piece and fix in position are installed is finished the snap close (capturing) of certain form.But, during fabrication or when installing, need not to make casing deformation or bending, so that the present invention can appropriately be worked.
What Figure 17 described is other wireless device, has wherein adopted the present invention, as (but being not limited to) portable computer, modulator-demodulator, data terminal, facsimile machine or similar portable electron device.Among Figure 17, the equipment of wireless device or employing wireless device 1700 has a main shell or a main body 1702 that has angle part, top 1704.In sectional view shown in Figure 17, antenna 500 is fixed on 1704 places, corner, and cable or wire device 1708 is used for circuit suitable in antenna electric feedback device 516 and the wireless device is linked to each other.Those of skill in the art will be understood that, also can adopt other antenna structure and orientation, and this is also in concept of the present invention.
Although above described various embodiment of the present invention, should be appreciated that these embodiment only are for example, and unrestricted.Therefore, width of the present invention and scope are not subjected to the restriction of above-mentioned exemplary embodiments, and should be limited by claims.

Claims (19)

1. isoplanar biobelt shape antenna is characterized in that it comprises:
Be installed in first conductive strips and second conductive strips on the base of dielectric, described first and second bands are an alternate selected gap each other, and wherein, the length and the width of described first and second bands are selected, form two conductor transmission lines thereby make, in order to receive and to send electromagnetic energy.
2. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, described first and second bands comprise and are printed on the same lip-deep metal tape of described base of dielectric.
3. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, described first and second bands comprise and are deposited on the same lip-deep metal tape of described base of dielectric.
4. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, described first and second are with on the facing surfaces that is formed in described base of dielectric.
5. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, described first band is parallel to described second band substantially.
6. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, described first and second bands are mutual horn-like the opening (flare away) of an open end.
7. isoplanar as claimed in claim 1 biobelt shape antenna, it is characterized in that, it also comprises a co-planar waveguide with positive and negative end, described co-planar waveguide is to form by dispensing metal on the same surface of described substrate, the described anode and the described first charged coupling, the described negative terminal and the described first and second charged couplings, wherein, surface current is with described first and second when being supplied with described isoplanar biobelt shape antenna electric energy by the signal of telecommunication by described co-planar waveguide and is formed.
8. isoplanar as claimed in claim 1 biobelt shape antenna, it is characterized in that, it also comprises the co-planar waveguide with positive and negative end, described co-planar waveguide forms by depositing metal on the same surface of described substrate, the described anode and the described first and second charged couplings, and the described negative terminal and the described second charged coupling, wherein, surface current is with described first and second when being supplied with described isoplanar biobelt shape antenna electric energy by the signal of telecommunication by described co-planar waveguide and is formed.
9. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, the length of described first band is less than the length of described second band.
10. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, the length of described first band equals the length of described second band.
11. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, the width of described first band is less than the width of described second band.
12. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, the width of described first band equals the width of described second band.
13. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, described base of dielectric is to play the flexible book sheet of dielectric effect.
14. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that described base of dielectric comprises the polyester resin film with preliminary election thickness.
15. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that described base of dielectric comprises the polyimide film with preliminary election thickness.
16. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, selects the length and the width of described first and second bands, makes described isoplanar dual band antenna can receive and send and has the interior signal of 1.85-1.99GHz frequency range.
17. isoplanar as claimed in claim 1 biobelt shape antenna is characterized in that, selects the length and the width of described first and second bands, makes described isoplanar dual band antenna can receive and send and has the interior signal of 824-894MHz frequency range.
18. isoplanar as claimed in claim 1 biobelt shape antenna, it is characterized in that, the length of described second band is approximately 4.53 inches, and the width of described second band is approximately 0.125 inch, and the length of described first band is approximately 2.4 inches, and the width of described first band is approximately 0.062 inch.
19. isoplanar as claimed in claim 1 biobelt shape antenna, it is characterized in that, the length of described second band is approximately 2.1 inches, and the width of described second band is approximately 0.125 inch, and the length of described first band is approximately 0.89 inch, and the width of described first band is approximately 0.062 inch.
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CN101764284A (en) * 2010-02-25 2010-06-30 云南银河之星科技有限公司 Novel antenna
CN102195111A (en) * 2010-02-05 2011-09-21 美国博通公司 Waveguide assembly and applications thereof
CN101288289B (en) * 2005-09-14 2011-09-21 松下电器产业株式会社 Portable wireless device
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CN104577329B (en) * 2015-02-10 2017-06-16 重庆大学 It is applied to the miniaturization flexible antennas of the high gain and high efficiency of complex communication system
CN113711437A (en) * 2019-04-17 2021-11-26 Bsh家用电器有限公司 Printed circuit board antenna
CN113711437B (en) * 2019-04-17 2023-12-01 Bsh家用电器有限公司 Printed circuit board antenna
US11881636B2 (en) 2019-04-17 2024-01-23 Bsh Hausgeraete Gmbh Printed circuit board antenna
TWI831404B (en) * 2022-10-04 2024-02-01 友達光電股份有限公司 Antenna device and manufacturing method thereof

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CA2321788C (en) 2008-02-12
JP2002504766A (en) 2002-02-12
KR100683991B1 (en) 2007-02-20
AU2772999A (en) 1999-09-06
FI117580B (en) 2006-11-30
CA2321788A1 (en) 1999-08-26
BR9908158A (en) 2001-09-04
CN1186852C (en) 2005-01-26
KR20010041218A (en) 2001-05-15
WO1999043037A3 (en) 1999-10-07
DE69937048T2 (en) 2008-05-29
JP4259760B2 (en) 2009-04-30
FI20001826A (en) 2000-10-23
HK1035073A1 (en) 2001-11-09
WO1999043037A2 (en) 1999-08-26
EP1072064A2 (en) 2001-01-31
DE69937048D1 (en) 2007-10-18
EP1072064B1 (en) 2007-09-05

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