Superconducting varactor tunable filter with constant bandwidth using coupling line

Guannan Suo; Xubo Guo; Bisong Cao; Bin Wei; Xiaoping Zhang; Tianning Zheng; Guoyong Zhang

doi:10.1109/LMWC.2014.2330694

Superconducting varactor tunable filter with constant bandwidth using coupling line

Guannan Suo
, Xubo Guo
, Bisong Cao
, Bin Wei
, Xiaoping Zhang
, Tianning Zheng
, Guoyong Zhang

Tsinghua University
Sino-Superconductor Technology, Ltd.

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

This letter presents a superconducting tunable filter with a constant bandwidth using semiconductor varactors. A coupling line is introduced to adjust the inter-resonator coupling to meet the requirement of constant bandwidth. The external couplings are designed to remain a good passband shape with the tunable frequency. With the proposed method, a superconducting tunable filter with constant bandwidth is successfully implemented. The measured results of the filter agree well with the simulated ones. It shows a frequency tuning range of 11% from 924.5 MHz to 1030.8 MHz, a 1 dB bandwidth of 23.8 ± 0.3 MHz, and an insertion loss of 0.16 to 1.41 dB.

Original language	English
Article number	6843362
Pages (from-to)	628-630
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	24
Issue number	9
DOIs	https://doi.org/10.1109/LMWC.2014.2330694
State	Published - 1 Sep 2014
Externally published	Yes

Keywords

Bandpass filter (BPF)
constant bandwidth
superconducting
tunable
varactor

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10.1109/LMWC.2014.2330694

Cite this

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title = "Superconducting varactor tunable filter with constant bandwidth using coupling line",

abstract = "This letter presents a superconducting tunable filter with a constant bandwidth using semiconductor varactors. A coupling line is introduced to adjust the inter-resonator coupling to meet the requirement of constant bandwidth. The external couplings are designed to remain a good passband shape with the tunable frequency. With the proposed method, a superconducting tunable filter with constant bandwidth is successfully implemented. The measured results of the filter agree well with the simulated ones. It shows a frequency tuning range of 11\% from 924.5 MHz to 1030.8 MHz, a 1 dB bandwidth of 23.8 ± 0.3 MHz, and an insertion loss of 0.16 to 1.41 dB.",

keywords = "Bandpass filter (BPF), constant bandwidth, superconducting, tunable, varactor",

author = "Guannan Suo and Xubo Guo and Bisong Cao and Bin Wei and Xiaoping Zhang and Tianning Zheng and Guoyong Zhang",

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AU - Suo, Guannan

AU - Guo, Xubo

AU - Cao, Bisong

AU - Wei, Bin

AU - Zhang, Xiaoping

AU - Zheng, Tianning

AU - Zhang, Guoyong

PY - 2014/9/1

Y1 - 2014/9/1

N2 - This letter presents a superconducting tunable filter with a constant bandwidth using semiconductor varactors. A coupling line is introduced to adjust the inter-resonator coupling to meet the requirement of constant bandwidth. The external couplings are designed to remain a good passband shape with the tunable frequency. With the proposed method, a superconducting tunable filter with constant bandwidth is successfully implemented. The measured results of the filter agree well with the simulated ones. It shows a frequency tuning range of 11% from 924.5 MHz to 1030.8 MHz, a 1 dB bandwidth of 23.8 ± 0.3 MHz, and an insertion loss of 0.16 to 1.41 dB.

AB - This letter presents a superconducting tunable filter with a constant bandwidth using semiconductor varactors. A coupling line is introduced to adjust the inter-resonator coupling to meet the requirement of constant bandwidth. The external couplings are designed to remain a good passband shape with the tunable frequency. With the proposed method, a superconducting tunable filter with constant bandwidth is successfully implemented. The measured results of the filter agree well with the simulated ones. It shows a frequency tuning range of 11% from 924.5 MHz to 1030.8 MHz, a 1 dB bandwidth of 23.8 ± 0.3 MHz, and an insertion loss of 0.16 to 1.41 dB.

KW - Bandpass filter (BPF)

KW - constant bandwidth

KW - superconducting

KW - tunable

KW - varactor

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JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

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M1 - 6843362

ER -

Superconducting varactor tunable filter with constant bandwidth using coupling line

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Keywords

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