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Novel broadband low-profile dielectric lens antenna

A dielectric lens antenna, low-profile technology, applied in the microwave field, can solve the problems of high antenna profile height, narrow gain bandwidth, etc., and achieve the effect of improving impedance bandwidth, increasing gain bandwidth, and low profile characteristics

Active Publication Date: 2017-09-15
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The traditional dielectric lens antenna has relatively narrow impedance bandwidth and gain bandwidth, and can only work in a small frequency band
[0005] 2. Part of the reflective surface of the traditional broadband dielectric lens antenna is a structure with a cavity, that is, an air layer is included between the two dielectric plates, which makes the height of the antenna section higher, and miniaturization is one of the future developments of the antenna. The inevitable trend

Method used

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  • Novel broadband low-profile dielectric lens antenna
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Embodiment Construction

[0028] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0029] The present invention provides a novel aperture coupled wideband low-profile dielectric lens antenna composed of four layers of dielectric plates, such as figure 1 and figure 2 In (a), (b) shown. The four-layer dielectric boards are the first to fourth dielectric boards that are placed coaxially from top to bottom and are all square, wherein the side lengths of the first, second and fourth dielectric boards are equal, and the side length of the third dielectric board is less than The first dielectric plate; the first dielectric plate is stacked on the upper surface of the second dielectric plate to form a part of the reflective surface; the third dielectric plate is a radiation medium plate, and there is an air layer between it and the second dielectric plate; the fourth dielectric plate It is the bottom feeder board, and there is also an...

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Abstract

The invention discloses a novel broadband low-profile dielectric lens antenna, and belongs to the technical field of microwave. The antenna feed source part of the lens antenna comprises two layers of dielectric plates; rectangular gaps in the metal grounding surface of the bottom layer dielectric plate of the feed source are coupled with square patches on the upper layer dialectic plate through an air layer to generate polarized wave; a novel cavity-free part reflective surface consists of two layers of frequency selection surfaces with dielectrics, and the reflective phases are changed along with frequencies in a positive slope manner and are matched with the feed source antenna so as to greatly improve the 3dB gain bandwidth of the antenna finally; by virtue of the cavity-free part reflective surface, the profile height of the resonant cavity antenna is lowered, so that the low profile characteristic of the antenna is realized; in addition, the reflective coefficient of the novel part reflective surface is higher than that of the similar type surface, so that the working frequency band gain of the antenna is improved stably; and in general, the design has certain application prospect.

Description

technical field [0001] The invention relates to a novel broadband low-profile dielectric lens antenna, which belongs to the field of microwave technology. Background technique [0002] With the rapid development of modern wireless communication technology, the requirements for miniaturized and planar antennas are getting higher and higher, and the requirements for their gain are also getting higher and higher. With the advent of the millimeter wave era, the frequency band resources of antennas are becoming more and more abundant, and the demand for broadband antennas is becoming more and more urgent. Therefore, a method of increasing the gain of the antenna by adding a part of the radiation surface in the radiation direction of the antenna is proposed. [0003] There are two problems in the design of traditional dielectric lens antennas: [0004] 1. The traditional dielectric lens antenna has relatively narrow impedance bandwidth and gain bandwidth, and can only work in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q13/10H01Q19/10
CPCH01Q1/38H01Q1/50H01Q13/10H01Q13/106H01Q19/10
Inventor 许锋曹奎根
Owner NANJING UNIV OF POSTS & TELECOMM
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