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Multifunctional Switchable Filter Using Coupled-Line Structure
IEEE Microwave and Wireless Components Letters ( IF 2.9 ) Pub Date : 2021-03-22 , DOI: 10.1109/lmwc.2021.3067893
Donghao Li , Kai-Da Xu

A compact multifunctional switchable filter based on parallel-coupled lines with three different filtering functions is presented in this letter. By using p-i-n switches to connect or disconnect microstrip line and shorted coupled lines, three different modes, i.e., wideband bandpass filter (BPF), bandstop filter (BSF), and dual-band BPF, can be realized. For demonstration, the switchable filter prototype is designed and fabricated. For the wideband BPF mode, the measured 3-dB fractional bandwidth is about 53.1% (1.41–2.43 GHz) with the measured insertion loss of 0.9 dB. For the BSF mode, the measured 10-dB fractional bandwidth is about 30.2% (1.63–2.21 GHz) with in-band suppression level of over 15.5 dB. For the dual-band BPF mode, the measured 3-dB bandwidths of the two passbands are around 3.8% and 2.7%, respectively.

中文翻译:

使用耦合线结构的多功能可开关滤波器

在这封信中介绍了一种紧凑的多功能可切换滤波器,它基于具有三种不同滤波功能的并行耦合线路。通过使用引脚开关来连接或断开微带线和短路耦合线,可以实现三种不同的模式,即宽带带通滤波器(BPF),带阻滤波器(BSF)和双频带BPF。为了演示,设计并制造了可切换滤波器原型。对于宽带BPF模式,测得的3-dB分数带宽约为53.1%(1.41–2.43 GHz),而测得的插入损耗为0.9 dB。对于BSF模式,测得的10-dB分数带宽约为30.2%(1.63-2.21 GHz),带内抑制电平超过15.5 dB。对于双频带BPF模式,两个通带测得的3-dB带宽分别约为3.8%和2.7%。
更新日期:2021-05-11
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