CN105428809A

CN105428809A - Boardband planar inverted-F antenna

Info

Publication number: CN105428809A
Application number: CN201510832739.3A
Authority: CN
Inventors: 魏瑰; 胡丹耀
Original assignee: Chongqing Jinmei Communication Co Ltd
Current assignee: Chongqing Jinmei Communication Co Ltd
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2016-03-23

Abstract

The present invention provides a broadband planar inverted-F antenna. The antenna consists of a substrate (1), a radiation patch (2), a short-circuiting wall (3), a feed patch (4) and a coaxial connector (5). The substrate (1) is in parallel to the radiation patch (2); the short-circuiting wall (3) is vertical to the substrate (1) and the radiation patch (2); the short-circuiting wall (3) is connected to both the substrate (1) and the radiation patch (2); and an inner conductor (6) of the coaxial connector (5) performs coupling feed on the radiation patch (2) after being vertically connected to the feed patch (4). The feed patch (4) has a capacitive load, so that sensor resistance introduced by the coaxial connector is effectively cancelled, a frequency bandwidth of the antenna is broadened to 67% (a voltage standing wave ratio is smaller than 2.0:1), and consistency of in-band gain and directional pattern performance is good.

Description

A kind of broadband planar inverted-F antenna

Technical field

The present invention relates to a kind of antenna broadband technology, particularly relate to a kind of broadband planar inverted-F antenna.

Background technology

The features such as planar inverted-F antenna has that structure is simple, overall dimension is less, with low cost, radiation directivity is more weak, are widely applied in small-size wireless terminal.

The frequency bandwidth of general planar inverted-F antenna is narrower, is usually no more than 10%(voltage standing wave ratio and is less than 2.0:1).Even if adopt floor fluting, increase parasitic element, load the methods such as shorting pin, frequency bandwidth also only can be made to be increased to about 30%.Frequency bandwidth is narrower, limits the scope of application of planar inverted-F antenna greatly.

Summary of the invention

The present invention proposes a kind of broadband planar inverted-F antenna, be made up of substrate (1), radiation patch (2), short circuit wall (3), fed patch (4), coaxial connector (5).Substrate (1) is parallel with radiation patch (2), short circuit wall (3) is perpendicular to substrate (1) and radiation patch (2), and short circuit wall (3) is connected with substrate (1), the equal short circuit of radiation patch, after the inner wire (6) of coaxial connector (5) is connected with fed patch (4) is vertical, couple feed is carried out to radiation patch (2).

Advantageous Effects of the present invention is: fed patch (4) has capacitive and loads, effectively can offset the induction reactance that coaxial connector is introduced, make the frequency bandwidth of antenna be widened to 67%(voltage standing wave ratio and be less than 2.0:1), the consistency of the gain in band and directional diagram performance is fine.

Accompanying drawing explanation

Fig. 1, structural representation of the present invention;

Fig. 2, voltage standing wave ratio figure;

The directional diagram of Fig. 3, yz plane;

The directional diagram of Fig. 4, xz plane;

The directional diagram of Fig. 5, xy plane;

1. substrates, 2. radiation patch in figure, 3. short circuit wall, 4. fed patch, 5. coaxial connector, the 6. inner wire of coaxial connector.

Embodiment

Below in conjunction with drawings and Examples, the present invention is described in further detail.

As shown in Figure 1, the antenna that the present invention proposes is made up of substrate (1), radiation patch (2), short circuit wall (3), fed patch (4), coaxial connector (5).Substrate (1) is parallel with radiation patch (2), short circuit wall (3) is perpendicular to substrate (1) and radiation patch (2), and short circuit wall (3) is connected with substrate (1), the equal short circuit of radiation patch, after the inner wire (6) of coaxial connector (5) is connected with fed patch (4) is vertical, couple feed is carried out to radiation patch (2).

A specific embodiment: adopt the copper coin of 0.3mm to make substrate, radiation patch, short circuit wall and fed patch, size 50mm × the 40mm of substrate, short circuit wall height 14.4mm, radiation patch is of a size of 24 × 40mm, fed patch is of a size of 16 × 10mm, the difference in height of fed patch and radiation patch is 5mm, and coaxial connector center is 25mm to the distance of short circuit wall.

As shown in Figure 2, the working band that the voltage standing wave ratio of antenna is less than 2.0:1 is 1.5GHz ~ 3.0GHz, and relative bandwidth reaches 67%.

As shown in Fig. 3 ~ Fig. 5, abscissa represents azimuth, and ordinate represents gain.Can find out, at grade, gain and the directional diagram consistency of each frequency are better.

Claims

1. a broadband planar inverted-F antenna, is made up of substrate (1), radiation patch (2), short circuit wall (3), fed patch (4), coaxial connector (5); Substrate (1) is parallel with radiation patch (2), short circuit wall (3) is perpendicular to substrate (1) and radiation patch (2), and short circuit wall (3) is connected with substrate (1), the equal short circuit of radiation patch, after the inner wire (6) of coaxial connector (5) is connected with fed patch (4) is vertical, couple feed is carried out to radiation patch (2).

2. antenna according to claim 1, is characterized in that, described inner wire (6) does not contact with radiation patch (2), and fed patch (4) does not also contact with radiation patch (2).

3. antenna according to claim 1, is characterized in that, described fed patch (4) and radiation patch (2) project on substrate (1) respectively, and two perspective views partly overlap.