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L-shaped probe feeding broadband circularly polarized patch antenna

A patch antenna and broadband technology, which is applied in the field of L-type probe feeding broadband circularly polarized patch antenna, can solve the problems of increasing area thickness and bandwidth, low income, unfavorable integration, and narrow bandwidth, etc. Simple, easy to integrate, thin profile effect

Active Publication Date: 2016-12-07
SICHUAN ZHONGCE MICROGRID TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen from the above that the current methods for realizing circularly polarized patch antennas are mainly divided into single-point feeding method and multi-point feeding method. Below, the bandwidth achieved by the multi-point feeding method is about 30% wider, but there will be a huge power division phase-shifting network, which is not conducive to integration
Regardless of the single-point feeding method or the multi-point feeding method, it is mainly to feed a single patch. In the multi-layer stacking patch method in the single-point feeding method, although there are multiple patches, only one patch is Direct feed, the rest are indirectly fed by the direct feed patch, and the increase in bandwidth obtained by increasing its area and thickness is very low.

Method used

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  • L-shaped probe feeding broadband circularly polarized patch antenna
  • L-shaped probe feeding broadband circularly polarized patch antenna
  • L-shaped probe feeding broadband circularly polarized patch antenna

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0038] like figure 1 , figure 2 The shown L-shaped probe-fed broadband circularly polarized patch antenna includes two circular patches 1 with the same structure and an L-shaped probe 2, where one patch 1 is opposite to the other patch 1 is rotated 90 degrees with the probe 2 as the center point on the horizontal plane. There are two back-to-back notches 11 on the patch 1, and the two notches 11 form a diagonal perturbation. The L-shaped probe 2 and the two Patch 1 is coupled and feeds the two Patch 1s in quadrature. In addition, preferably, in this embodiment, the shapes and sizes of the two notches 11 are set to be the same. Further preferably, the notch 11 is square in shape, with a length of 0.1λ to 0.15λ and a width of 0.15λ to 0.2λ.

Embodiment 2

[0040] like image 3 As shown, this embodiment refines the structure of the probe on the basis of the above embodiment, that is, the probe includes two connected L-shaped first connection parts and second The connection part, the first connection part includes a first connection strip 21 , the second connection part includes a second connection strip 22 and a phase delay strip 23 , the second connection strip 22 is equal to the first connection strip 21 . Preferably, in this embodiment, the phase delay strip 23 can be set in a semi-circular shape, and the first connection part and the second connection part are connected to the stripline 3 through the third connection part 24, and the stripline 3 realizes the feeding of the entire antenna. Electricity. The antenna of this structure can be realized by using LTCC multilayer circuit processing technology, and the third connection part 24 is vertically arranged to the first connection part.

[0041] In multilayer circuit technol...

Embodiment 3

[0044] like Figure 4 As shown, the above antenna structure can be realized by LTCC multilayer circuit processing technology. The substrate material is FerroA6M, the dielectric constant is 5.9, the thickness of each layer of substrate is 0.094mm, the thickness of each layer of metal is 0.01mm, the surface metal is gold, and the inner The layer metal is silver. The working frequency band of the antenna is the Ka band.

[0045] The L-type probe feed broadband circularly polarized patch antenna of the present invention has a total of 14 layers, namely h 1 =0.094mm×14=1.316mm. Among them, two patches 1 are located on the front side of the first layer of medium, that is, the top layer. The first connection part and the second connection part of the probe 2 are located on the front side of the fourth layer dielectric, and the third connection part of the probe 2 is a multi-layer stacked metallized via hole, which penetrates through the 4th to 11th layer of dielectric and passes t...

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Abstract

The present invention discloses an L-shaped probe feeding broadband circularly polarized patch antenna. The antenna comprises two circular patches of the same structure, and an L-shaped probe. One patch rotates by 90 degree with the probe as a center point on a horizontal plane relative to another patch. Each patch is provided with two back-to-back notches. The two notches form diagonal perturbation. The L-shaped probe is coupled with the two patches and performs orthogonal feeding on the two patches. Due to adoption of the foregoing structure, under the condition of broad 3-dB axis ratio and impedance matched bandwidth, each patch uses a direct feeding manner, a power-diving phase shift network is not needed, and the antenna is realized by using multi-layer circuit technologies like LTCC and multi-layer PCB, and is convenient to integrate.

Description

technical field [0001] The invention relates to the field of antenna devices, in particular to an L-shaped probe feeding broadband circularly polarized patch antenna. Background technique [0002] Antenna is one of the essential equipment for various civil and military radio systems such as radio communication, broadcasting, navigation, radar, measurement and control, microwave remote sensing, radio astronomy, and electronic countermeasures. [0003] Circularly polarized antennas have the advantages of anti-fog and rain interference and multipath reflection capabilities, and can eliminate polarization distortion caused by ionospheric Faraday rotation effects, and have attracted more and more attention. At the same time, as one of many antenna types, the patch antenna has always been a research hotspot for antenna designers because of its low cost, low profile, and high integration. However, the impedance matching and 3-dB axial ratio bandwidth of traditional circularly pola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50
CPCH01Q1/38H01Q1/50
Inventor 董宇亮杜明邓建华
Owner SICHUAN ZHONGCE MICROGRID TECH CO LTD
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