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Bandpass filters with reconfigurable transmission zeros using varactor-tuned tapped stubs

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2 Author(s)
Hualiang Zhang ; Dept. of Electr. & Electron. Eng, Univ. of Sci. & Technol., Kowloon, China ; Chen, K.J.

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.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:16 ,  Issue: 5 )