Title :
Bandpass filters with reconfigurable transmission zeros using varactor-tuned tapped stubs
Author :
Zhang, Hualiang ; Chen, Kevin J.
Author_Institution :
Dept. of Electr. & Electron. Eng, Univ. of Sci. & Technol., Kowloon, China
fDate :
5/1/2006 12:00:00 AM
Abstract :
In this letter, bandpass filters with one or two tunable transmission zeros are proposed. The reconfigurable transmission zeros are implemented through varactors in combination with tapped quarter-wavelength stubs. Based on mixed mode simulations including EM simulation and circuit simulation, the proposed filters were designed and fabricated on low-cost FR4 board. The measurement results verified the design concepts.
Keywords :
band-pass filters; poles and zeros; varactors; EM simulation; FR4 board; bandpass filters; circuit simulation; mixed mode simulations; reconfigurable transmission zeros; tapped quarter-wavelength stubs; tunable transmission zeros; varactor-tuned tapped stubs; Band pass filters; Circuit simulation; Equations; Filtering theory; Frequency; Impedance; Resonator filters; Tunable circuits and devices; Tuning; Varactors; Bandpass filter; microstrip lines; reconfigurable transmission zeros; tapped quarter-wavelength stubs;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.873586
