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Frequency-selective broadband waveguide slot antenna array

A frequency selective, slot antenna technology, applied in slot antennas, antenna arrays, antennas, etc., can solve problems such as poor anti-interference ability, and achieve the effects of weight reduction, interference suppression, and large loss

Active Publication Date: 2009-10-14
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of poor anti-interference ability of the existing waveguide slot antenna, the present invention provides a frequency-selective broadband waveguide slot that can realize the frequency band matching transmission of the system, while other frequency bands do not transmit, and can eliminate the interference outside the working band. antenna array

Method used

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  • Frequency-selective broadband waveguide slot antenna array

Examples

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Embodiment 1

[0031] see figure 1 , image 3 , Figure 5 and Figure 6 , a preferred embodiment is a uniformly distributed 16-element waveguide slot antenna array (five-stage filter antenna) working in the X-band, and the antenna operating frequency range is f L ~ f H , where f L is the lowest frequency, f H is the highest frequency, f 0 is the center frequency, and the upper side frequency of the stop band is f S .

[0032] The antenna array consists of radiation waveguide 1, feed waveguide 2, coaxial connector 3 and radiation slot 4, such as figure 1 shown.

[0033] The radiation waveguide 1 is a rectangular metal ridge waveguide with internal ridges, the terminal is closed, and the metal ridge 5a is located on the center line of the bottom edge, such as image 3 and 6 shown.

[0034] The feeding waveguide 2 is also a rectangular metal ridge waveguide with a closed terminal and internal ridges. The metal ridge 5b is located on the center line of the bottom edge, as shown in ...

Embodiment 2

[0049] see figure 2 , Figure 4 and Figure 6 , working in the X-band, uniformly distributed 16-element waveguide slot antenna array (secondary filter antenna), on the metal ridge 5b of the feeding waveguide 2, between the coaxial connector 3 and the coupling slots 6 on both sides, each with 3 grooves, such as figure 2 and 4 As shown, there are 2 short metal ridges between the phases, that is, a 2-stage filter. In this embodiment, the filter size and position parameters are preferably: L1=0.171λ 0 , L2=0.252λ 0 , W0=1.74λ 0 , W1=0.168λ 0 .

[0050] Others are with embodiment 1.

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Abstract

The invention relates to a frequency-selective broadband waveguide slot antenna array which solves the problem that the existing waveguide slot antenna has poor capacity of resisting out-of-band interference. The frequency-selective broadband waveguide slot antenna array comprises a radiating waveguide, a feeding waveguide, a coaxial connector and a radiating slot. Both the radiating waveguide andthe feeding waveguide are rectangular metal ridge waveguide tubes with a ridge inside and terminals closed and the metal ridges are respectively positioned at the central line of the bottom edge; thecoaxial connector is positioned in the center of the lower edge of the feeding waveguide; the metal ridge of the feeding ridge waveguide between the coaxial connector and coupled slots at both sidesis symmetrically provided with more than three grooves and the overall structure of the grooves is battlement-shaped and forms two waveguide evanescent-mode filters; and the two waveguide evanescent-mode filters have the same structure and are respectively positioned on the straight waveguide sections of the two output arms of a 3dB power splitter. The frequency-selective broadband waveguide slotantenna array protects the antenna from the interference of signals out of the work frequency band and has the advantages of low loss, reduced weight, no additional equipment, high reliability and compact structure.

Description

technical field [0001] The invention relates to the structural improvement of waveguide slot resonant antenna array, in particular to a frequency-selective broadband waveguide slot antenna array. The invention can be used both for receiving and for transmitting radio waves. In military terms, it can be used as a terminal antenna for broadband, anti-jamming phased array radar systems. In civilian use, it can be used as a base station antenna for polarization diversity communication. Background technique [0002] With the rapid development of applications and requirements, the use of electromagnetic spectrum has been greatly expanded and fully applied, and it is becoming more and more crowded. On the one hand, there are more and more electronic devices working at various frequencies; on the other hand, some platforms such as ships, aircraft and satellites are limited in space; in addition, the frequency band requirements of some electronic devices are getting wider and wider...

Claims

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Application Information

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IPC IPC(8): H01Q13/18H01Q13/08H01Q21/00H01P1/219
Inventor 汪伟李磊张洪涛张智慧张玉梅
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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