Reconfigurable Parallel Coupled Band Notch Resonator With Wide Tuning Range

Author

Zhengpeng Wang ; Kelly, James R. ; Hall, Peter S. ; Borja, Alejandro L. ; Gardner, Peter

Author_Institution

Sch. of Autom. & Electr. Eng., Univ. of Sci. & Technol. Beijing, Beijing, China

Volume

61

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

6316

Lastpage

6326

Abstract

This paper presents a new form of reconfigurable band notch resonator with a wide tuning range. The whole structure consists of a through line and two parallel coupled resonators. This paper presents an accurate lumped element equivalent circuit for the parallel coupled resonator. The mechanism giving rise to the wide tuning range is also investigated. The first harmonic of the fundamental stop-band is analyzed and compared with that of the varactor-coupled resonator. Measurement results show that the stop-band of the filter can be tuned from 0.6 to 4.0 GHz. This is achieved by varying the capacitance of two pairs of varactor diodes. The stop-band tuning range is restricted by the capacitance variation which can be achieved using the varactor diode. The potential tuning range of a filter based on this resonator is greater than one decade.

Keywords

band-stop filters; equivalent circuits; resonators; varactors; frequency 0.6 GHz to 4.0 GHz; lumped element equivalent circuit; parallel coupled resonators; reconfigurable band notch resonator; stop-band filter; varactor diodes; varactor-coupled resonator; Capacitance; Equivalent circuits; Resonant frequency; Resonator filters; Tuning; Varactors; Microstrip filter; parallel coupled resonator; reconfigurable filter; wide tuning range;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2014.2311386

Filename

6766257