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A substrate integrated ridge gap waveguide and a broadband circularly polarized leaky wave antenna

A gap waveguide and substrate integration technology, applied in leaky waveguide antennas, antennas, antenna arrays, etc., can solve the problems of high cost and difficult processing, and achieve the effects of reduced processing cost, excellent gain flatness, and compact overall structure

Inactive Publication Date: 2018-12-18
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional ridge-gap waveguide is a metal cavity structure, which is difficult to process and high in cost
In addition, in the design of leaky wave antennas, it is difficult to maintain good gain flatness in a wide operating frequency band

Method used

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  • A substrate integrated ridge gap waveguide and a broadband circularly polarized leaky wave antenna
  • A substrate integrated ridge gap waveguide and a broadband circularly polarized leaky wave antenna
  • A substrate integrated ridge gap waveguide and a broadband circularly polarized leaky wave antenna

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Embodiment 1

[0041] In this embodiment, the substrate-integrated ridge-gap waveguide and the structural dimensions of the leaky-wave antenna based on the waveguide are as follows: figure 1 (a)~(b), figure 2 , image 3 (a)~(b), Figure 4 , the simulation results of the leaky wave antenna are as follows Figure 5 , Image 6 , Fig. 7 and Figure 8 As shown, the present invention maintains the wide-band and frequency scanning characteristics of the leaky wave antenna, and realizes the characteristics of circular polarization and high gain flatness, and realizes the circular polarization of -1° to 47° in the frequency range of 12GHz to 15GHz Frequency sweep characteristics, the average gain reaches 11dBic, and the gain flatness is less than 2dB.

[0042] The invention can effectively improve the performance of the leaky wave antenna in applications such as wireless positioning and wireless communication by improving the gain flatness of the leaky wave antenna.

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Abstract

The invention discloses a substrate integrated ridge gap waveguide and a broadband circularly polarized leaky wave antenna. The substrate integrated ridge gap waveguide comprises an upper layer dielectric plate, upper layer peripheral metallized vias, an upper layer rectangular metal patch, two rectangular annular metal patches, a lower layer dielectric plate, lower layer peripheral metallized vias, a metal ridge, an electromagnetic band gap EBG structure, a metal ground, a feeding probe and a matching probe; the substrate integrate metal ridge is formed by two rows of metallized vias in the center of the low layer and a dumbbell-shaped metal patch; the electromagnetic band gap EBG structure is composed of periodic mushroom-shaped structural units arranged on both sides of a rectangular strip in the middle of the dumbbell-shaped metal patch, and is used for limiting electromagnetic wave leakage to two sides. The upper layer and lower layer dielectric plates are tightly bonded. The wideband circularly polarized leaky wave antenna is a slot array arranged on the upper surface of the upper rectangular metal patch, and circularly polarized radiation is realized. The invention maintainsthe wide band and frequency scanning characteristics of the leaky wave antenna, and realizes the characteristics of circular polarization and high gain flatness.

Description

technical field [0001] The invention relates to the technical field of waveguide devices, in particular to a substrate-integrated ridge-gap waveguide and a broadband circularly polarized leaky-wave antenna. Background technique [0002] The leaky wave antenna has a unique wide operating frequency band and frequency scanning characteristics, and has a wide range of applications in anti-collision radar, wireless positioning and other fields. Circularly polarized antennas help reduce the adverse effects of polarization mismatch and multipath effects in wireless communications. Therefore, circularly polarized leaky-wave antennas have good application prospects in intelligent highway traffic systems and automatic train control systems. [0003] The ridge-gap waveguide has the advantages of small transmission loss, easy design of the working frequency band, and wide bandwidth. Therefore, it is a common method to combine the ridge-gap waveguide and design the upper radiation slot ...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q13/20H01Q13/22H01Q13/26H01Q15/24H01Q19/02H01Q21/00
CPCH01Q1/38H01Q1/48H01Q1/50H01Q13/20H01Q13/22H01Q13/26H01Q15/24H01Q19/02H01Q21/00H01Q21/0006
Inventor 石树杰曹文权曾志远吕昕梦
Owner ARMY ENG UNIV OF PLA
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