Title :
Low-cost 63% efficient 2.5-kW UHF power amplifier for a wind profiler radar
Author :
Lindseth, Brad ; Kelly, Tom ; Brown, William O.J. ; Hock, Terry ; Cohn, Stephen A. ; Popovic, Zoya
Author_Institution :
National Center for Atmospheric Research, Boulder, CO 80307, USA
Abstract :
This paper describes a low-cost 449-MHz 2.5-kW peak pulse amplifier for use in a wind profiling radar. New high-power LDMOS transistors are enabling the use of kilowatt level pulse power amplifiers for under US25¢/W in transistor costs. With pulse duty cycles of 10–20%, kilowatt modules with efficiencies greater than 60% can be combined to achieve multi-kilowatt transmitters, allowing higher transmit powers and improved radar signal to noise ratio.
Keywords :
Capacitors; Gain; Impedance matching; Power amplifiers; Radar; Radar antennas; Transistors; Atmospheric measurements; meteorological radar; power amplifiers; pulse amplifiers;
Conference_Titel :
Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International
Conference_Location :
Montreal, QC, Canada
Print_ISBN :
978-1-4673-1085-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2012.6259635
