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Improved Fabry-Perot resonant cavity antenna

An improved technology for resonant cavity antennas, applied in the field of resonant cavity antennas, can solve the problem of low gain bandwidth and achieve the effects of increased gain, impedance bandwidth and gain bandwidth

Inactive Publication Date: 2015-11-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to provide an improved Fabry-Pérot resonator antenna in order to solve the problem of low gain bandwidth of the existing Fabry-Pérot resonator antenna

Method used

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  • Improved Fabry-Perot resonant cavity antenna
  • Improved Fabry-Perot resonant cavity antenna
  • Improved Fabry-Perot resonant cavity antenna

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specific Embodiment approach 1

[0033] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment, the improved Fabry-Pérot resonant cavity antenna described in this embodiment, it comprises feed source 1 and partial reflector 2,

[0034] The feed source 1 is a rectangular patch antenna, and a part of the reflector 2 is placed in parallel above the feed source 1, and the height of the resonant cavity formed between the feed source 1 and the part of the reflector 2 is h;

[0035] Part of the reflector 2 is a double-sided coating structure, the upper surface of which is a periodically arranged copper-clad array, and the lower surface is a periodically arranged hollow cross-shaped copper-clad square array;

[0036] The method that makes described resonant cavity antenna obtain maximum gain is:

[0037] Let the directivity function of the feed 1 be f(α), and the reflection coefficient of the partial reflector 2 be The transmission coefficient is The reflection...

specific Embodiment approach 2

[0053] Specific implementation mode two: the following combination image 3 Describe this embodiment, this embodiment will further explain Embodiment 1, in the copper clad array on the upper surface of the partial reflector 2, the side length of all the square copper clad in the middle row of copper clad is 4.12mm, all the copper clad in the copper clad array The mutual spacing is 0.88mm.

specific Embodiment approach 3

[0054] Specific implementation mode three: the following combination Figure 1 to Figure 7 Describe this embodiment mode, this embodiment mode will further explain Embodiment 2, in the hollow cross-shaped copper clad square array on the lower surface of the partial reflector 2, the side length of each period is 5 mm, and the cross length of the hollow cross shape is 4.6mm, the width of the hollow cross is 2mm.

[0055]Each periodic unit of the lower surface of the partial reflection plate 2 is a small square of a dielectric plate of 5 mm×5 mm, a relative permittivity of 1.5, and a thickness of 1.5 mm.

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Abstract

The invention relates to an improved Fabry-Perot resonant cavity antenna, belongs to the technical field of resonant cavity antennas, and aims at solving the problem that the present abry-Perot resonant cavity antenna is low in gain bandwidth. The antenna comprises a feed source and a portion reflecting plate, the feed source includes a rectangular patch antenna, the portion reflecting plate is arranged over the feed source in parallel, and the height of a resonant cavity body formed between the feed source and the portion reflecting plate is h; and the portion reflecting plate is of a double-layer coating structure, the upper surface of the portion reflecting plate includes a copper clad array of periodical arrangement, and the lower surface includes a hollow cross-shaped copper clad square array of periodical arrangement. A PRS structure of the portion reflecting plate enables a reflection value module value of the reflecting plate to be higher, the gain of the feed source antenna is thus improved, the phase and frequency of the reflection coefficient is positively correlated, and thus, the impedance bandwidth and the gain bandwidth are both improved.

Description

technical field [0001] The invention relates to an improved Fabry-Pérot resonant cavity antenna, belonging to the technical field of resonant cavity antennas. Background technique [0002] In recent years, high-gain, low-profile planar antennas have been widely used in centimeter-wave and even millimeter-wave communications, such as high-speed wireless local area networks, satellite transceiver systems, and point-to-point wireless communications. However, due to the small gain and narrow bandwidth of a single antenna, it cannot meet the needs of today's communication systems. Antennas arranged in an array can increase gain and bandwidth through coupling, but the antenna feeding system will be very complicated. Relatively speaking, the Fabry-Pérot resonant cavity antenna provides us with a simple new method to increase the antenna gain without increasing the complexity of the feeding system. The traditional Fabry-Pérot resonator antenna is composed of a part of the reflecto...

Claims

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Application Information

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IPC IPC(8): H01Q19/10H01Q1/50
Inventor 祁嘉然肖姗姗刘畅邱爽
Owner HARBIN INST OF TECH
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