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Ring-loaded microstrip patch antenna

A microstrip patch antenna and patch technology, which is applied in the directions of antennas and electrical components to achieve better circular polarization performance, improved axial ratio performance, and low side lobes.

Active Publication Date: 2013-01-23
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to differences in principles, structures and materials, this technology has not been used in patch antennas.

Method used

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  • Ring-loaded microstrip patch antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, a three-layer microstrip antenna working in three frequency bands of the L-band is designed.

[0028] as attached figure 1 As shown, the loop-loaded microstrip patch antenna of the present invention includes a reflector 1, a lower patch 2, a middle patch 3 and a ring-loaded upper patch 4, and the three-layer patch and the reflector 1 are connected by a short-circuit metal The pillar 6 is supported, and the center of the short-circuit metal pillar 6 is provided with a via hole. The edge 11 of the upper patch 4 is turned down to form a ring loading form, such as image 3 shown. A cover plate 5 is stacked on the upper patch 4, and the cover plate 5 is slotted. The feeder 10 of the upper layer patch 4 passes through the via hole in the center of the short-circuit metal pillar 6 , connects the impedance matching section 12 at the slotted part of the cover plate 5 , and then feeds it to the middle layer patch 3 . The impedance matching section 12 is ad...

Embodiment 2

[0037] The loop-loaded antenna technology of the present invention can be applied not only to laminated microstrip antennas, but also to single-layer microstrip antennas.

[0038] Such as Figure 8 As shown, Embodiment 2 designs a single-layer microstrip antenna working at 1.2GHz, including a reflector 1, an upper patch 4, a short-circuit metal post 6 and a feeding probe 13, and a single-probe feeding is used to realize the line pole change. The simulation shows that by properly adjusting the position of the feeding probe 13 , the height of the upper patch 4 and the height of the turned edge of the upper patch 4 , good electrical performance can be obtained.

[0039] When the upper patch 4 does not adopt the ring loading technology, the diameter of the reflector 1 is about 220mm; after using the ring loading technology, the diameter of the reflector 1 is about 170mm when the same electrical performance is achieved. Compared with the ordinary patch without ring loading, the l...

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Abstract

The invention discloses a ring-loaded microstrip patch antenna, comprising a reflecting plate (1), a lower patch (2), an intermediate patch (3) and a ring-loaded upper patch (4), wherein a short-circuit metal column (6) with a hole in the middle serves as a support among the three patches and the reflecting plate (1); a cover plate (5) is superposed on the upper patch (4); a feeder of the upper patch (4) passes through the hole in the middle of the short-circuit metal column (6), is connected with an impedance matching segment (12) on the cover plate (5) and then is fed onto the intermediate patch (3); a feeding port (8) of the intermediate patch (3) and a feeding port (9) of the lower patch (2) are connected with the circle center of the patches by lines to form included angles of 90 degrees to feed in circularly polarized radiation waves with equal signal amplitude and phase difference of 90 degrees; and the edge (11) of the upper patch (4) turns downwards to form a ring similar to the bottle cap. The edge of the upper patch turns downwards and the antenna utilizes the ring loading technology, thus increasing the gain of the upper patch and lowering the sidelobe and back lobe level.

Description

technical field [0001] The invention belongs to the field of microwave communication, in particular to a loop-loaded microstrip patch antenna. Background technique [0002] Since the single-layer microstrip antenna is mainly a resonant microstrip antenna with relatively narrow bandwidth, the stacked microstrip antenna is an easy-to-implement and highly feasible microstrip antenna form when designing a broadband microstrip antenna. [0003] Due to its low profile, microstrip antennas have many outstanding advantages in terms of structure and physical properties. For the case of wide bandwidth, multi-layer patch structures are currently used to widen the impedance bandwidth of microstrip antennas. The design idea of ​​the multi-layer patch is that when a tightly coupled loop with staggered tuning is used, the frequency band will be broadened. According to this idea, the microstrip antenna composed of multi-layer patches is designed, and the size of each layer patch is adjuste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q13/08
Inventor 张群杨文丽罗耀辉赵泓懿黎红武蔡木仁吴春邦刘波
Owner XIAN INSTITUE OF SPACE RADIO TECH
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