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

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Problems solved by technology

[0004] The purpose of the invention is to provide an improved Fabry-Pérot resonator antenna in

Method used

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

Examples

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Example Embodiment

[0033] Specific implementation mode 1: the following combination Figure 1 to Figure 3 To explain this embodiment, the improved Fabry-Pérot resonant cavity antenna described in this embodiment includes a feed source 1 and a partially reflective plate 2.

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

[0035] The partially reflective plate 2 has a double-sided cladding 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 for maximizing the gain of the resonant cavity antenna is:

[0037] Suppose the directivity function of feed 1 is f(α), and the reflection coefficient of partial reflector 2 is The transmission coefficient is The reflection coefficient of the floor is set to 1e...

Example Embodiment

[0053] Specific implementation manner 2: the following combination image 3 This embodiment will be described. This embodiment will further explain the first embodiment. In the copper-clad array on the upper surface of the partial reflector 2, the side length of all square copper-clad in the copper-clad middle column is 4.12mm, and all copper-clad in the copper-clad array The mutual distance is 0.88mm.

Example Embodiment

[0054] Specific implementation manner three: the following combination Figure 1 to Figure 7 This embodiment will be described. This embodiment will further explain the second embodiment. In the hollow cross 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 is 4.6mm, the cross width of the hollow cross is 2mm.

[0055] Each periodic unit on the lower surface of the partially reflective plate 2 is a small square of a dielectric plate of 5 mm×5 mm, a relative dielectric constant 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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