CN1225817C

CN1225817C - Plane aerial equipment

Info

Publication number: CN1225817C
Application number: CN 02124775
Authority: CN
Inventors: 彼得·约瑟夫·弗农
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-25
Filing date: 2002-06-25
Publication date: 2005-11-02
Anticipated expiration: 2022-06-25
Also published as: AU783548B2; CN1393957A; ZA200205065B; AU4888402A; NZ519721A; JP2003046312A

Abstract

A planar antenna including a rectangular conductive element formed from two square elements. The square elements are defined within the rectangle by a centrally located and bifurcated return conductor having two legs. Each square element is connected at one end to a connector element and at the other end to the return conductor. The dimensions of the square elements are chosen so as to maximize gain for selected radio frequencies. The antenna further includes one or more additional but partial square elements, each additional partial square element terminating adjacent the respective square element at one end and being defined by one leg of the return conductor on one side.

Description

Flat plane antenna

Technical field

The present invention relates to be intended to be fixed to the antenna on plane, be used for radio-frequency apparatus, such as a cell phone, GPS navigation system and other RF use.The invention still further relates to a kind of method, be used on substrate, making conductive pattern.

Background technology

In many existing application, all provide a RF antenna so that can communicate by letter, such as cell phone, gps system, radio data network or the like.In some cases, equipment configuration has antenna, for example a stub unit on a cell phone.Yet in other cases, need provide an outside antenna that connects.In addition, for the application apparatus the cell phone that uses in automobile, expectation provides an additional antenna to come enhancing signal intensity.Traditional antenna for this purpose externally is installed on the vehicle usually.This has just increased wind noise, is easy to be damaged, and impairs the outward appearance of vehicle.

For such any antenna applications, need to consider variety of issue.Be separated from above-mentioned pointed problem, antenna should provide maximum effective area, and preferably appearance is not outstanding showy simultaneously.Installation should be simple, and on the electricity and be reliable on the structure.

The inboard of having advised a vehicle window by adhering to array to an automobile provides a kind of antenna.The U.S. Patent No. 5363114 of Shoemaker has been described a plane, spiral antenna, and it is adhered to a carrier layer, and is adhered to a suitable surface of vehicle then.The antenna of the disclosure has a kind of layout of spirality composition.

An object of the present invention is to provide a kind of improved antenna that is used to be installed on the plane surface.

Summary of the invention

According to one aspect of the present invention, a kind of flat plane antenna is provided, comprise a rectangular conductive element that forms by two rectangular member, two rectangular member are hollow, the common edge of two rectangular member by a centrally-located with bifurcated, return conductor with two lead-in wires limits in rectangle, each rectangular member is connected to a connecting element and is connected to described return conductor on the other end at one end, wherein select the size of rectangular member so that maximum gain is arranged for selected radio frequency, it is characterized in that antenna further comprises one or more additional part rectangular member, each additional part rectangular member is a hollow, one side of the part rectangular member that each is additional is limited by return conductor, and each additional part rectangular member contiguous corresponding rectangular member on the one end stops.

Should be understood that the term plane means the smooth surface and the surface of smoothed curve, such as the shape of a windshield.

Antenna arrangement of the present invention has many advantages than existing design.In the application of planning, antenna is adhered to an existing surface (such as a window), does not need this body structure of conducting element hard, thereby can use sparse geometry.In addition, this can make antenna have a sizable effective area, because it is installed on the surface rather than is freestanding.In addition, owing to have level and vertically arranged element, antenna can receive the signal of horizontal or vertical polarization well, in that this is very favourable in the application of scattering because causing appears in building and other structures.

In addition, the invention provides a kind of method, be used on a substrate, providing conducting element, comprise step:

Use conductive ink on a substrate, to print the conductive pattern of an expectation; With

In an electroplating process, use the figure that forms from conductive ink as an electrode, the other electric conducting material of electro-deposition on conductive pattern.

Advantageously, electric conducting material can be a copper.The parameter of electroplating process will depend on selected technology, but should provide the copper of an adequate thickness, rather than deposit too much copper and figure is become be easy to out mechanical breakdown.The inventor has been found that in cellular phone application about 25 microns thickness is suitable.

Figure is suitable for by using a kind of silk-screen printing technique to print.In practice, can print one opens flexible material greatly and uses the proper implements cutting so that many aerial arrays to be provided.

After deposition, preferably apply a kind of two-sided adhesive film (preferably transparent), expect surperficial mechanism to be provided for adhering to, and prevent the corrosion of copper.

The inventor for the actual manufacturing of antenna after deliberation the whole bag of tricks.Though explained the present invention at this, should be understood that the present invention can be applied to the manufacturing of other conductors on the substrate devices equivalently.Independent use conductive ink can not provide the proper resistor characteristic of antenna, just can draw electro-deposition is increased in the printing process after having passed through a large amount of repetition tests.

Description of drawings

To one embodiment of the present of invention be described in conjunction with the accompanying drawings now, wherein:

Fig. 1 is the plane graph of an embodiment of present device;

Fig. 2 has schematically shown the connection of the another embodiment of the present invention that can carry out many equipment connections; With

Fig. 3 is the exploded view that the connector of Fig. 2 is arranged.

Embodiment

The present invention is primarily aimed at the equipment that is designed to as an other optional equipment adheres to a surface and is described.Yet, be noted that the Antenna Design of invention can be formed the part of article, or be formed in the shell of the part of a vehicle for example or an electronic equipment.

Fig. 1 has shown one embodiment of the present of invention, is suitable for conduct in the cell phone frequency, a multiband antenna that uses on the frequency band of global positioning satellite (GPS) frequency and PCS Personal Communications System (PCS) frequency.

Antenna 10 is rectangular shape normally, is formed by four elements 12,13,17 and 18.Two elements 12 and 13 are rectangular member, are connected to connecting element 32 and 33 respectively.Element 12 and 13 adjacent edge are formed by a public lead-in wire 41 and 42 that returns element, and this returns element and also is connected to connecting element 31.Two elements 17 and 18 are part rectangular member and the inside that is provided at element 12,13 respectively.Yet part rectangular member 17 is not that (the same with rectangular member 12 and 13) is connected to connecting element 32 and 33 with 18, but does not arrive lead-in wire 41,42 respectively.Have the common edge of this bifurcated element formation of lead-in wire 41 and 42, and be connected to center connector 31 by each element 12,13,17 and 18 square (or part is square) of forming.

This design is based on a kind of understanding, and promptly this is for many application, and the reception on multiband is useful, and a plurality of harmonic waves of 900MHz frequency band approach other frequency band, in the case, the GPS frequency band is at 1575MHz, and the PCS frequency band is at 1800-2000MHz.Element 12 and 13 have be suitable for 900MHz+/-size of 50MHz.Center part 17 and the 18 suitable resonance that allow on GPS and PCS frequency band.

Antenna size is shown in the drawings.It is span and the about 30 microns thickness of about 1mm that trace (track) is supposed to, and comprises conductive ink and copper.Although the turning is shown as the right angle, can be round if desired.Antenna element is installed on the plate 11 (being shown as the dotted line profile) of a suitable flexible material.This can be any suitable substrate, for example transparent polyester, or any material that is used for flexible PCB.Preferred materials is transparent, when particularly using in vehicle, so that minimal visual is disturbed.In the application of being discussed, film thickness is suitable between 75 and 300 microns.

Can determine the suitable length of antenna element according to formula:

L＝K/F

Wherein L is a length, and F is that frequency and K are constants, and it changes with the dielectric property of the material around the conductor.Under the realization situation of describing, need to consider the dielectric property of substrate.Should be appreciated that in use, the dielectric property on the surface (for example windshield) that is adhered to also will be relevant with constant K, and therefore relevant with length L.

For the antenna of size shown in Figure 1, the resonance frequency on a glass substrate is 99MHz and 1800MHz, and antenna has 1.08: 1 VSWR on the 900MHz frequency band, is 2.8: 1 on the 1575MHz frequency band.

The hyaline membrane that is used for best implementation is impatient at and is for example welded related high-temperature.Fig. 3 has shown by the exploded view of a kind of layout of inventor's exploitation, can be connected to a transmission lines to antenna.

In the embodiment of Fig. 2 and 3, element 20 is coupling parts of copper tracing wire.Should be appreciated that this is maintained between substrate film 11 and the two-sided adhesive film (not shown), and therefore the contact is not exposed simply to connect.Pad 21 be placed on element 20 below, socket 22 be placed on element 20 above.Conductive rivet, for example brass is inserted into by the opening in the

pad

24,25,26,27, by element 20, and by corresponding hole in the socket 22.This just provides a kind of electrical connection between the outside 16 of socket 22 bodies and element 20.Another rivet by element 20 middle body 15 and enter the middle body of socket 22.So, by schematic pressure fitted mechanical connection manner attachment plug 23 easily just, be used to be connected to antenna so that provide a cable to fetch to this equipment.

Fig. 2 represents arrange-wherein to receive a plurality of frequency bands according to a connection that is used for an equipment of the present invention, and expectation is connected to different equipment to the signal of these frequency bands.Example ground, these equipment are a cell phone and a GPS receiver.Antenna 30 is connected to connector 23 on the cable 24 through socket 22.Cable 24 is connected to antenna power separator unit 25 to antenna.This just provides one to connect 26 for a cell phone, and provides one to be connected 27 for a GPS receiver.

The equipment that is suitable for use as antenna power separator 25 is to have bought.The function of this equipment is that

output port

26,27 is isolated from each other so that equipment does not separately disturb each other mutually.Under this specific occasions, what paid close attention to will be to guarantee that cellular emitted energy arrives the GPS receiver.Expectation be that the antenna power separator should have at least-isolating coefficient of 25dB in this uses.Should be clear, required isolation will be depended on the equipment of planning to be connected to antenna 30.

Should be understood that, be described, have many other application although the present invention is primarily aimed at a situation that adheres to the vehicle antenna of a window inboard.The antenna of invention can adhere on the building wall of inside or outside, perhaps is used to realize a WLAN or other data network.It can use easily, makes amendment to adapt to frequency band variation, that be used to move or fixing data record and transmission.

In the occasion of a highly conductive figure of needs, when especially using transparent substrates, can use method of the present invention.

Claims

1. flat plane antenna, comprise a rectangular conductive element that forms by two rectangular member, two rectangular member are hollow, the common edge of two rectangular member by a centrally-located with bifurcated, return conductor with two lead-in wires limits in rectangle, each rectangular member is connected to a connecting element and is connected to described return conductor on the other end at one end, wherein select the size of rectangular member so that maximum gain is arranged for selected radio frequency, it is characterized in that antenna further comprises one or more additional part rectangular member, each additional part rectangular member is a hollow, one side of the part rectangular member that each is additional is limited by return conductor, and each additional part rectangular member contiguous corresponding rectangular member on the one end stops.

2. according to a kind of antenna of claim 1, wherein conducting element forms on a substrate.

3. according to a kind of antenna of claim 2, wherein substrate is a flexible membrane.

4. according to a kind of antenna of claim 2 or 3, wherein substrate is transparent.

5. according to a kind of antenna of claim 1, wherein all rectangular member are electrically connected to identical connecting element, and return conductor is connected to another connecting element that separates with described connecting element electricity.

6. according to a kind of antenna of claim 1, also comprise the diaphragm that is applied on the conducting element.

7. according to a kind of antenna of claim 6, wherein this diaphragm all has viscosity on the two sides.