CN201163660Y

CN201163660Y - Integration antenna

Info

Publication number: CN201163660Y
Application number: CNU2008200923064U
Authority: CN
Inventors: 李云华; 刘奕昌
Original assignee: Invengo Information Technology Co Ltd
Current assignee: Invengo Information Technology Co Ltd
Priority date: 2008-02-22
Filing date: 2008-02-22
Publication date: 2008-12-10
Anticipated expiration: 2018-02-22

Abstract

The utility model discloses an integrated antenna. The technical problem to be solved is to meet the requirement on miniaturization and integration of the antenna of a UHF frequency band wireless system. An antenna plate of the integrated antenna is provided with microstrip Baran wires connected with a symmetrical bent dipole wires. Compared with the prior art, the integrated antenna adopts the connection of the microstrip Baran and the symmetrical bent dipole, the dipole is a balancing device, when the dipole is connected with a nonequilibrium transmission line such as a microstrip line, the bandwidth is broadened and the cross polarization is inhibited by balancing the connection with a nonequilibrium converter (Balan), the bent dipole integrates a radiation unit with a feeding unit, the whole size of the antenna is 45 mm x 46.9 mm; moreover, the bandwidth is wider, the gain is higher, the performance is stable, the process is easy, and the requirements on miniaturization and integration of the antenna of the UHF frequency band portable wireless communication product are better met.

Description

Antenna integrated

Technical field

The utility model relates to a kind of antenna structure, the particularly a kind of reception of microwave signal in 800MHz～1000MHz frequency range and integrated antenna structure of emission of being suitable for.

Background technology

The electronic circuit miniaturization, integrated be important development trends in field such as electronics, communication, as an important devices in the wireless system, antenna also faces same problem.Antenna and transmission circuit are integrated in the stability that can improve antenna and Circuits System on the same circuit board, and reduce the cost of system, but the radiation efficiency of antenna and frequency bandwidth characteristics can be restricted.Printed dipole is as a kind of simple in structure, and the antenna that radiance is good has obtained using widely in portable set.Therefore provide and satisfy the hyperfrequency uhf band, miniaturization, integrated antenna is to adapt to electronics or communications field miniaturization, integrated needs.

Summary of the invention

The purpose of this utility model provides a kind of antenna integrated, and the technical problem that solve is to satisfy the uhf band wireless system to antenna miniaturization, integrated needs.

The utility model is by the following technical solutions: a kind of antenna integrated, described antenna integrated antenna plate is provided with the microstrip balun wiring, and the microstrip balun wiring is connected up with the bending dipole of symmetry and is connected.

Microstrip balun of the present utility model is made of two-wire parallel lines and metal conduction band, one end of two-wire parallel lines has metallic vias, metallic vias is connected with the metal conduction band, metal conduction band and two-wire parallel lines extend in parallel, the other end of two-wire parallel lines is connected, and the extension of two-wire parallel lines link constitutes microstrip-fed port.

Two-wire parallel lines length of the present utility model is quarter-wave.

The width of the utility model metal conduction band is 1.84mm.

The bending dipole of symmetry of the present utility model is that the dipole of T shape short-circuited conducting sleeve and two bendings connects and composes.

Dipole to two bendings of the present utility model is the bending that shape takes the shape of the letter U.

The bending slot length of U-shaped of the present utility model is 25mm～35mm.

The overall dimension of the utility model T shape short-circuited conducting sleeve is 10.2mm * 1.9mm.

Microstrip-fed port of the present utility model and microstrip balun junction are the zigzag corner.

The utility model antenna plate is of a size of and is not more than 45mm * 46.9mm.

The utility model compared with prior art, adopt microstrip balun to be connected with the bending dipole of symmetry, dipole is a kind of balancing device, when linking to each other, link to each other by balun (Ba Lun) with non-balanced transmission line such as microstrip line, with widening frequency band and inhibition cross polarization, the bending dipole integrates radiating element and feed element, the overall dimensions of antenna is 45mm * 46.9mm, and frequency band broad, it is higher to gain, stable performance, the miniaturization of uhf band portable wireless communication product to antenna satisfied in processing preferably easily, requirement such as integrated grade.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the outline dimensional drawing of the utility model embodiment.

Fig. 3 is the microstrip balun structure chart of the utility model embodiment.

Embodiment

Below in conjunction with drawings and Examples the utility model is elaborated.Dipole is a kind of balancing device, need pass through balun (Ba Lun) and link to each other when linking to each other with non-balanced transmission line such as microstrip line, with widening frequency band with suppress cross polarization.Of the present utility model antenna integrated, as to adopt microstrip balun to be connected structure with T shape coupling bending dipole.As shown in Figure 2, microstrip balun and T shape coupling bending dipole are arranged on the antenna plate 4, and antenna plate 4 is printed board, and antenna plate 4 is of a size of and is not more than 45mm * 46.9mm.

As shown in Figure 3, microstrip balun 1 wiring is that quarter-wave two-wire parallel lines 11 and metal conduction band 12 constitute by length, two-wire parallel lines 11 length are between 35mm～42mm in the present embodiment, one end of two-wire parallel lines 11 has metallic vias 2, metallic vias 2 is connected with metal conduction band 12, metal conduction band 12 extends in parallel with two-wire parallel lines 11, the other end of two-wire parallel lines 11 is connected, the extension of two-wire parallel lines 11 links constitutes microstrip-fed port one 3, and microstrip-fed port one 3 can be the zigzag corner with microstrip balun 1 junction.

As depicted in figs. 1 and 2, the bending dipole adopts T shape coupling feeding classification to link to each other with microstrip balun 1 wiring, two-wire parallel lines 11 have an end of metallic vias 2 to be connected with T shape coupling bending dipole 3, T shape coupling bending dipole 3 has two dipoles that take the shape of the letter U, and the bending slot length of U-shaped is 25mm～35mm.One end of two U-shapeds connects by T shape matching structure, T shape matching structure is a T shape short-circuited conducting sleeve, and the overall dimension of T shape short-circuited conducting sleeve is 10.2mm * 1.9mm, and T shape short-circuited conducting sleeve top is a horizontal word hollow shape, the bottom is vertical hollow shape, and vertically the both sides of hollow shape are two-wire parallel lines 11.Two-wire parallel lines 11, T shape coupling bending dipole 3 are arranged in the back side (metal ground) of antenna plate 4 together with microstrip-fed port one 3.Width is the upper surface that the metal conduction band 12 of 1.84mm is arranged in antenna plate 4.Metal conduction band 12 links to each other with metal ground by metallic vias 2 in the junction of the T shape matching structure of microstrip balun 1 and dipole 3.Microstrip-fed port one 3 directly links to each other with 50 ohm microstrip of radio receiving transmitting module by microstrip line.

Dipole 31 links to each other with radio receiving transmitting module microstrip line port by microstrip balun 1, in order to reduce the antenna integrated overall dimensions of microstrip balun bending dipole, dipole 31 adopts bending structure in the parallel direction of microstrip balun 1, makes antenna integrated overall dimensions maintain in 45mm * 46.9mm.The dipole 31 of bending adopts T shape coupling, with the input impedance characteristic that obtains.The input impedance of antenna of the present utility model is that bandwidth reaches 20MHz near 50 ohm, for uhf band wireless system integrated provides a kind of good scheme, also can reduce system cost largely.

The course of work of the present utility model: the microstrip balun that is made of two-wire parallel lines 11 and metal conduction band 12 is transformed into the perpendicular polarization electric field of feed microstrip line in the parallel polarization electric field of bending dipole, this double-decker effect is to suppress cross polarization, broadening working band.

The input impedance of antenna of the present utility model can be regulated by the length of T shape matching structure short-circuited conducting sleeve, and resonance frequency can bend the length of groove by the U type of bending dipole and regulate.

Claims

One kind antenna integrated, it is characterized in that: described antenna integrated antenna plate (4) is provided with microstrip balun (1) wiring, microstrip balun (1) wiring is connected up with the bending dipole (3) of symmetry and is connected.
2. according to claim 1 antenna integrated, it is characterized in that: described microstrip balun (1) is made of two-wire parallel lines (11) and metal conduction band (12), one end of two-wire parallel lines (11) has metallic vias (2), metallic vias (2) is connected with metal conduction band (12), metal conduction band (12) extends in parallel with two-wire parallel lines (11), the other end of two-wire parallel lines (11) is connected, and the extension of two-wire parallel lines (11) link constitutes microstrip-fed port (13).
3. according to claim 2 antenna integrated, it is characterized in that: described two-wire parallel lines (11) length is quarter-wave.
4. according to claim 3 antenna integrated, it is characterized in that: the width of described metal conduction band (12) is 1.84mm.
5. according to claim 4 antenna integrated, it is characterized in that: the bending dipole (3) of described symmetry connects and composes for the dipole (31) of T shape short-circuited conducting sleeve and two bendings.
6. according to claim 5 antenna integrated, it is characterized in that: the bending that described dipole to two bendings (31) takes the shape of the letter U for shape.
7. according to claim 6 antenna integrated, it is characterized in that: the bending slot length of described U-shaped is 25mm～35mm.
8. according to claim 7 antenna integrated, it is characterized in that: the overall dimension of described T shape short-circuited conducting sleeve is 10.2mm * 1.9mm.
9. according to claim 8 antenna integrated, it is characterized in that: 1 mouthful 1 (13) at described microstrip-fed end and microstrip balun (1) junction are the zigzag corner.
10. according to claim 9 antenna integrated, it is characterized in that: described antenna plate (4) is of a size of and is not more than 45mm * 46.9mm.