Study on the Microstrip DBR Diplexer Based on DGS

CHEN Chun-hong; LI Na; WU Wen

doi:10.3969/j.issn.0372-2112.2012.01.003

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Study on the Microstrip DBR Diplexer Based on DGS

更新时间：2025-07-16

- Study on the Microstrip DBR Diplexer Based on DGS
- Acta Electronica Sinica Vol. 40, Issue 1, Pages: 14-18(2012)
- 作者机构：
  
  南京理工大学近程高速目标探测技术国防重点学科实验室,江苏,南京,210094
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2012.01.003
  CLC： TN713
- Published：2012
- 稿件说明：
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CHEN Chun-hong, LI Na, WU Wen. Study on the Microstrip DBR Diplexer Based on DGS[J]. Acta Electronica Sinica, 2012, 40(1): 14-18.
DOI：

CHEN Chun-hong, LI Na, WU Wen. Study on the Microstrip DBR Diplexer Based on DGS[J]. Acta Electronica Sinica, 2012, 40(1): 14-18. DOI： 10.3969/j.issn.0372-2112.2012.01.003.

摘要

提出了一种高隔离度的微带双工器结构.在微带双重行为谐振(DBR)滤波器中引入基于缺陷地结构(DGS)的低通滤波器

利用DGS的慢波特性减小DBR滤波器奇偶模之间的相速差

从而改善滤波器的上阻带特性.使用本文提出的微带滤波器结构设计并研制了一C波段的微带双工器

仿真和测试结果表明:微带双工器的插入损耗小于1.3dB

隔离度大于65dB.

Abstract

This paper presents a high isolation microstrip diplexer.The lowpass filter based on defected ground structure(DGS) is introduced into the dual behavior resonator(DBR) microstrip bandpass filter.The slow-wave characteristic of DGS can balance the phase-velocity difference between even-mode and odd-mode of DBR filter

so the rejection in the up stop band of filter can be improved.The DBR filer based on DGS has been analyzed.On this basis

a C-band microstrip diplexer has been developped

and the simulation and experimental result indicate that the insertion loss is less than 1.3dB and the isolation is better than 65dB.

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