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A multi-band frequency selective structure design method with ultra-high frequency ratio

A frequency selection, ultra-high frequency technology, applied in the direction of antennas, electrical components, etc., can solve the problems of poor performance in the high frequency resonant frequency band, narrow distribution frequency range of the resonant frequency band, etc., and achieve the effect of good electrical performance.

Active Publication Date: 2021-08-17
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the current multi-resonant frequency band type frequency selection structure faces the problems of narrow distribution frequency range of resonant frequency bands and poor in-band performance of high frequency resonant frequency bands

Method used

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  • A multi-band frequency selective structure design method with ultra-high frequency ratio
  • A multi-band frequency selective structure design method with ultra-high frequency ratio
  • A multi-band frequency selective structure design method with ultra-high frequency ratio

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, and the embodiments described with reference to the accompanying drawings are exemplary, and are only used to explain the technical solutions of the present invention, and should not be construed as limiting the present invention.

[0032] Design requirements: A planar electromagnetic window on a stealth mast is required to have two bandpass frequency bands of 300~1000MHz and 3±0.1GHz, the in-band transmittance>-3dB, the out-of-band transmittance Image 6 shown; includes the following steps:

[0033] Step 1. The frequency selective surface to be applied is a planar structure, so a multi-period combined array is used.

[0034] Step 2. Due to the requirement of band-pass frequency selection, it can be determined to use a slot-type array; due to the high requirements on the ban...

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Abstract

The invention discloses a multi-band frequency selection structure design method with an ultra-high frequency ratio, which selects a multi-period combination array or a unit array combination method of a combination array with different densities, and determines the array units participating in the nested combination with the resonant frequency band as a constraint The unit parameters and the corresponding unit array parameters, determine the unit parameters and the corresponding unit array parameters of the array units participating in the nested combination, and then adjust the array unit parameters and array unit positions participating in the nested combination to meet the topological integrity requirements, and finally Calculate and verify the in-band performance of the multi-period combined array / different density combined array formed after the array units are combined, so as to solve the problem of narrow resonant frequency band distribution frequency range and high-frequency resonant frequency band faced by the current multi-resonant frequency band type frequency selection structure Internal performance problems.

Description

technical field [0001] The present invention relates to the field of communication and electromagnetic filtering, more specifically to a design method of a frequency selective structure with high frequency ratio and high in-band transmittance (reflectivity) and multiple resonant frequency bands. Background technique [0002] The multi-resonant frequency band frequency selective structure is a kind of electromagnetic component with multiple frequency selection windows, which can realize total reflection or total transmission of signals of multiple frequencies, so it is widely used in multi-frequency antennas, multi-frequency radome, integrated Stealth mast, multi-frequency electromagnetic filter components and other fields. [0003] Generally speaking, a single band-pass (stop) frequency (also known as a resonance frequency band, band-pass means that the signal is fully transmitted, and band-stop means that the signal is fully reflected) can be obtained by using a two-dimensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0013H01Q15/0046
Inventor 黄敏杰
Owner BEIHANG UNIV