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A hmsiw filter with independently controllable transmission zero position

A transmission zero and filter technology, applied in the microwave field, can solve the problems of limiting filter application and large filter size, and achieve the effect of flexible design, convenient design and reduced size

Active Publication Date: 2021-11-02
SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of SIW full-mode cavity makes the size of the filter too large, and the transmission zero point can only be located in the upper stop band of the filter, which limits the application of the filter

Method used

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  • A hmsiw filter with independently controllable transmission zero position
  • A hmsiw filter with independently controllable transmission zero position
  • A hmsiw filter with independently controllable transmission zero position

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: An HMSIW filter with independently controllable transmission zero (taking a pair of metallized perturbation vias as an example in the transmission zero adjustment structure)

[0046] Such as figure 1 As shown, it includes the first HMSIW cavity 1, the second HMSIW cavity 2, the SIW cavity 3, the first pair of metallized perturbation vias 4, the second pair of metallized perturbation vias 5, and the first coupling window 6 , the second coupling window 7, the first feeding microstrip line 8, and the second feeding microstrip line 9; the side walls of all the cavities are composed of metallized through holes 10 arranged periodically.

[0047] Along the x-axis, the first HMSIW cavity 1, the SIW cavity 3, and the second HMSIW cavity 2 are distributed in sequence; the open ends of the first HMSIW cavity 1 and the second HMSIW cavity 2 are facing oppositely, and the first HMSIW The side walls of the cavity 1 and the second HMSIW cavity 2 opposite to the open end...

Embodiment 2

[0058] Embodiment 2: An HMSIW filter with independently controllable transmission zero point (take a slot line as an example for the transmission zero point adjustment structure)

[0059] Such as Figure 6 As shown, it includes the first HMSIW cavity 1b, the second HMSIW cavity 2b, the SIW cavity 3b, the first slot line 4b, the second slot line 5b, the first coupling window 6b, the second coupling window 7b, the first feeder The electrical microstrip line 8b, the second feeding microstrip line 9b; the side walls of all the cavities are composed of periodically arranged metallized through holes 10b.

[0060] Along the x-axis, the first HMSIW cavity 1b, SIW cavity 3b, and second HMSIW cavity 2b are distributed sequentially; the open ends of the first HMSIW cavity 1b and the second HMSIW cavity 2b are facing oppositely, and the first HMSIW The side walls of the cavity 1b and the second HMSIW cavity 2b opposite to the open end are shared with the SIW cavity 3b; the dimensions of ...

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Abstract

The invention discloses an HMSIW filter with independently controllable transmission zero position, which comprises a first HMSIW cavity, a second HMSIW cavity, an SIW cavity, a first pair of metallized perturbation through holes or a first slot line, a second Two metallized perturbation via hole pairs or second slot line, first coupling window, second coupling window, first feeding microstrip line, and second feeding microstrip line. It utilizes the TE of the HMSIW rectangular cavity 301 and TE 102 The transmission pole and transmission zero of the filter are respectively constructed by the mode, and the position of the transmission zero can be controlled conveniently and independently by introducing a pair of metallized through-holes or a slot line in the HMSIW cavity, while maintaining the bandwidth of the filter. It greatly facilitates the design of the filter while improving the frequency selectivity of the filter and the rejection of the stop band.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to an HMSIW filter, in particular to an HMSIW filter whose transmission zero point position is independently controllable. Background technique [0002] Modern wireless communication systems require filters with small size, low insertion loss, high frequency selectivity and high stop-band rejection. Substrate-integrated waveguide (SIW) has been widely used in filter design due to its advantages of low loss, low cost, easy processing and easy integration. However, compared to microstrip or coplanar waveguide (CPW) filters, SIW filters are relatively large in size. Therefore, half-mode substrate-integrated waveguide (HMSIW) filters have emerged, which can achieve nearly half the size reduction. However, the traditional HMSIW filter response lacks sufficient transmission zeros, resulting in insufficient frequency selectivity and stopband rejection of the filter. [0003] In order t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/212H01P1/208
CPCH01P1/2088H01P1/212
Inventor 朱舫吴云飞赵鑫罗国清
Owner SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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