Title :
Cascode-delay-matched distributed amplifiers for efficient broadband microwave power amplification
Author :
Krishnamurthy, K. ; Long, S.I. ; Rodwell, M.J.W.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
We present a broadband distributed power amplifier topology capable of providing efficiencies approaching 50%. Unlike tapered-drain-line power TWAs, high-Z/sub 0/ lines are not required, greatly improving realizability in MMIC implementation. An experimental hybrid achieved bandwidth 25% of f/sub /spl tau// with /spl sim/15 dB gain and 30/spl plusmn/5% power-added-efficiency.
Keywords :
HEMT integrated circuits; MMIC power amplifiers; distributed amplifiers; travelling wave amplifiers; wideband amplifiers; 15 dB; 25 to 35 percent; HEMTs; MMIC implementation; broadband microwave power amplification; cascode-delay-matched distributed amplifiers; power-added-efficiency; realizability; Bandwidth; Broadband amplifiers; Delay lines; Distributed amplifiers; HEMTs; Impedance; MODFETs; Power amplifiers; Power transmission lines; Transmission line theory;
Conference_Titel :
Microwave Symposium Digest, 1999 IEEE MTT-S International
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
0-7803-5135-5
DOI :
10.1109/MWSYM.1999.779885
