An active-passive cascaded bandpass filter with an 88 kHz-1.1 GHz bandwidth on substrate-integrated suspended line platform

被引：0

作者：

Yang, Zhuojun ^{[1
]}

Ma, Kaixue ^{[1
,2
]}

Wang, Yongqiang ^{[1
]}

Yan, Ningning ^{[1
]}

机构：

[1] Tianjin Univ, Sch Microelect, Tianjin Key Lab Imaging & Sensing Microelect Techn, Tianjin, Peoples R China

[2] Tianjin Univ, Sch Microelect, Tianjin Key Lab Imaging & Sensing Microelect Techn, Tianjin 300072, Peoples R China

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2023年 / 65卷 / 02期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

active-passive cascaded structure; bandpass filter (BPF); DC-offset cancellation (DCOC); low cut-off frequency; SISL platform; DESIGN;

D O I：

10.1002/mop.33537

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter proposes an active-passive cascaded bandpass filter based on the substrate-integrated suspended line platform for the first time. By cascading an active-RC highpass circuit with a passive-LC lowpass filter circuit, the proposed filter achieves a GHz bandwidth, an extremely low cut-off frequency, and a controllable in-band gain. It has the advantages of compact size, DC-offset cancellation, and self-packaging. As proof of concept, a sixth-order bandpass filter was designed and fabricated. The measured 3-dB bandwidth is from 88 kHz to 1.1 GHz with a 5.8 dB in-band gain, and the circuit area is only 0.021 x 0.022 lambda g, where lambda g is the guided wavelength at 0.55 GHz.

引用

页码：541 / 547

页数：7