Title :
S-band reflection type variable attenuator
Author :
Trent, Christopher R. ; Weller, Thomas M.
Author_Institution :
Center for Wireless & Microwave Inf. Syst., Univ. of South Florida, Tampa, FL, USA
fDate :
7/1/2002 12:00:00 AM
Abstract :
A reflection type variable attenuator is described in this letter. The main component of the circuit is a microstrip 3 dB quadrature coupler. The coupler is used in conjunction with two varactor diodes to vary the attenuation from 2.2 dB to 17 dB over a 40% bandwidth (2.8-4.2 GHz). If married with a programmable voltage controller, the proposed design will provide a low-cost solution for applications with narrow instantaneous bandwidth.
Keywords :
microstrip couplers; varactors; waveguide attenuators; 2.8 to 4.2 GHz; MEMS-type variable capacitors; S-band reflection type variable attenuator; microstrip 3 dB quadrature coupler; narrow instantaneous bandwidth; programmable voltage controller; varactor diodes; Attenuation; Attenuators; Bandwidth; Capacitors; Coupling circuits; Frequency; P-i-n diodes; Reflection; Varactors; Voltage control;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2002.801131
