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Slot-coupled broadband single-feed circularly polarized microstrip antenna

A microstrip antenna and circular polarization technology, which is applied in the direction of antenna, antenna grounding device, antenna grounding switch structure connection, etc., can solve the problem of high uniformity of dielectric materials, inability to carry out complex network layout, and long coupling gap of microstrip antenna and other problems, to achieve the effect of saving processing steps, simple structure, and good symmetry of the pattern

Pending Publication Date: 2020-10-30
陕西天鼎无线技术股份有限公司
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  • Abstract
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Problems solved by technology

[0007] The coupling gap of the microstrip antenna in the prior art is too long, and the longest part is equivalent to the radiation patch, so it is impossible to carry out the layout of the complex network, and the back radiation is relatively large; in addition, in the prior art, the air layer in the double-layer radiation patch Some of them are filled with a medium with a dielectric constant close to air, and the material is very expensive, which increases the production cost of the product, and at the same time requires high uniformity of the dielectric material

Method used

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  • Slot-coupled broadband single-feed circularly polarized microstrip antenna
  • Slot-coupled broadband single-feed circularly polarized microstrip antenna
  • Slot-coupled broadband single-feed circularly polarized microstrip antenna

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Embodiment

[0034] A slot-coupled broadband single-feed circularly polarized microstrip antenna with a structure such as Figure 1-2 As shown, it includes a first radiating patch 1, an air support structure 3, a second radiating patch 4 and a metal ground plate 5 laid down from top to bottom;

[0035] Among them, the double-layer radiation patch is used to widen the bandwidth. The principle is that the resonant frequency of the upper and lower two-layer radiation patches is different. By changing its size, the resonant frequency of the two is adjusted to partially overlap to achieve the purpose of widening the bandwidth;

[0036] The first radiating patch 1 and the second radiating patch 4 are provided with a cut-off structure to realize circular polarization, such as figure 1 As shown, this embodiment adopts left-handed circular polarization. If right-handed circular polarization is obtained, the cutting angle position can be changed; both the first radiation patch 1 and the second radia...

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Abstract

The invention provides a slot-coupled broadband single-feed circularly polarized microstrip antenna. The slot-coupled broadband single-feed circularly polarized microstrip antenna comprises a first radiation patch, an air supporting structure, a second radiation patch and a metal grounding plate which are arranged from top to bottom in a covering manner, and the first radiation patch and the second radiation patch are provided with corner cut structures. The first radiation patch and the second radiation patch are both pasted on the dielectric layer. The air supporting structure is of a rectangular-ambulatory-plane narrow frame structure. The top of the metal grounding plate is provided with a coupling gap, the bottom of the metal grounding plate is provided with a feed dielectric layer, aradio frequency signal feeder line is arranged below the coupling gap, and the radio frequency signal feeder line penetrates through the feed dielectric layer and feeds to the first radiation patch and the second radiation patch. According to the microstrip antenna adopted by the invention, the coupling gap size is reduced, network layout is facilitated, an air layer is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a slot-coupled broadband single-feed circularly polarized microstrip antenna. Background technique [0002] The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator and a ground plane. The thickness of the dielectric substrate is much smaller than the wavelength. The thin metal layer at the bottom of the substrate is connected to the ground plane, and the thin metal layer with a specific shape is made on the front side by photolithography as a radiator. The shape of the radiation sheet can be changed in many ways according to requirements. The rise of microwave integration technology and new manufacturing processes has promoted the development of microstrip antennas. Compared with traditional antennas, microstrip antennas are not only small in size, light in weight, low profile, easy to conform, easy to integrate, low in cost, suitabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q1/48H01Q1/38H01Q13/08
CPCH01Q1/38H01Q1/48H01Q1/50H01Q13/08
Inventor 袁宇阳张宏波吴莎
Owner 陕西天鼎无线技术股份有限公司
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