Proceedings ArticleDOI
A varactor-tuned, active microwave band-pass filter
C.-Y. Chang,T. Itoh +1 more
- Vol. 1, pp 499-502
TLDR
In this paper, a microwave tunable high-Q active bandpass filter was developed using a varactor diode for tuning and a MESFET to provide negative resistance for increasing the tank circuit Q-value.Abstract:
A microwave tunable high-Q active bandpass filter was developed using a varactor diode for tuning and a MESFET to provide negative resistance for increasing the tank circuit Q-value. Tuning ranges of 500 MHz for the one-pole filter and 430 MHz for the two-pole filter were achieved with a center frequency of 10 GHz. A 3-dB bandwidth of 20 MHz for the one-pole filter and 80 MHz for the two-pole filter was obtained. The passband insertion loss is typically 0+or-1 dB. >read more
Citations
More filters
Journal ArticleDOI
MMIC active bandpass filters using varactor-tuned negative resistance elements
U. Karacaoglu,Ian D. Robertson +1 more
TL;DR: In this paper, the negative resistance topologies for both bipolar (AlGaAs/GaAs HBT) and FET (MESFET or HEMT) devices are studied and compared.
Journal ArticleDOI
An Analytic Design Method for Microstrip Tunable Filters
Juseop Lee,Kamal Sarabandi +1 more
TL;DR: In this article, an analytic design procedure for microstrip tunable filters is described, where step-impedance resonators are employed and loaded with varactors for achieving agility in the filter response.
Journal ArticleDOI
A compact bandpass filter with two tuning transmission zeros using a CMRC resonator
TL;DR: In this paper, the authors presented a new compact, low-insertion loss, sharp-rejection, and narrow-band microstrip bandpass filter (BPF) using a compact microstrip resonant cell (CMRC) as the resonator.
Journal ArticleDOI
A varactor-tuned active microwave bandpass filter
H. Trabelsi,C. Cruchon +1 more
TL;DR: In this article, a microwave high Q-active bandpass filter is presented using a varactor diode for tuning, and an active component giving a substantial increase in Q of the resonant sections of filter.
Journal ArticleDOI
Active microwave filters with noise performance considerations
E.G. Krantz,G.R. Branner +1 more
TL;DR: In this article, the authors present a precision computer-oriented technique to accurately predict and quantify the noise performance of various active microwave filter realizations, and experimental examples are presented which validate the simulation methodology.
References
More filters
Journal ArticleDOI
Microwave Active Filters Based on Transversal and Recursive Principles
TL;DR: Transferal and recursive filter concepts, normally associated with discrete-time applications, are adapted for implementation in the microwave frequency range in this paper, with microwave transistors used as active elements.
Journal ArticleDOI
Active Filters for UHF and Microwave Frequencies
D.K. Adams,R.Y.C. Ho +1 more
TL;DR: In this paper, a technique for using transistors directly as high-Q inductors at microwave frequencies is described, and several experimental band-pass filters have been built and tested to verify usefulness of the inductive transistor circuit.
Journal ArticleDOI
Analysis and Design of a Microwave Transistor Active Filter
R.V. Snyder,D.L. Bozarth +1 more
TL;DR: In this article, the inverted common collector transistor resonator filters were analyzed in terms of the input immittance parameters, and a design procedure for the resulting circuitry was suggested, and the stability of the resultant circuitry was discussed.