Title :
High-Q tuned active bandpass filter for wireless application
Author :
Kapilevich, Boris ; Lukjanets, Roman
Author_Institution :
Siberia State Univ. of Telecommun. & Inf., Novosibirsk, Russia
Abstract :
The paper presents a novel high-Q microwave tuned active bandpass filter using varactor diodes for tuning and a BJT to compensate for losses. The experimental filter with stepped resonator circuits and special coupling elements have been fabricated and tested demonstrating a good agreement with the circuit model predictions. Tuning range of 400 MHz for the active filter is achieved with the centre frequency of 1.6 GHz. A 3 dB bandwidth of 50 MHz is obtained and passband gain is typically 0.5-1.0 dB in the whole tuning range
Keywords :
active filters; band-pass filters; circuit tuning; microstrip filters; microstrip resonators; microwave filters; microwave receivers; mobile radio; varactors; 0.5 to 1 dB; 1.6 GHz; 50 MHz; circuit model predictions; high-Q tuned active bandpass filter; loss compensation; microstrip tuned resonator; microwave filter; stepped resonator circuits; varactor diodes; wideband BJT amplifier; wireless application; Active filters; Band pass filters; Circuit optimization; Circuit testing; Coupling circuits; Diodes; Microwave filters; Resonator filters; Tuning; Varactors;
Conference_Titel :
Electronic Instrument Engineering Proceedings, 2000. APEIE-2000. Volume 1. 2000 5th International Conference on Actual Problems of
Conference_Location :
Novosibirsk
Print_ISBN :
0-7803-5903-8
DOI :
10.1109/APEIE.2000.913128
