Title :
Ka-band 2 watt power SSPA for LMDS application
Author :
Shu, J. ; Hwang, T. ; Nguyen, D. ; Pumares, R. ; Chye, P. ; Khanna, P.
Author_Institution :
Div. of Wireless Infrastruct., Hewlett-Packard Co., Santa Clara, CA, USA
Abstract :
A Ka-band high power single power supply SSPA, using a MM-wave power PHEMT process, has been successfully developed for LMDS (Local Multi-point Distribution System) application. Operated under 5 V single power supply, this four stage amplifier has 23 dB of linear gain and typical 33 dBm (2 W) of 1 dB gain compression power for the entire 900 MHz bandwidth (27.5/spl sim/28.4 GHz). This amplifier is designed to meet the demanding hub station linearity requirement of the DAVIC specification for grade A QPSX modulation of data and video transmission. When operated at 30 dBm (1 W) power output with single channel band limited signal, the spectral re-growth is -35 dBc, 3 dB better than the -32 dBc performance target. To our knowledge, the linearity performance presented is the best reported so far for this application.
Keywords :
microwave power amplifiers; 1 to 2 W; 23 dB; 27.5 to 28.4 GHz; 5 V; 900 MHz; DAVIC specification; Ka-band high power SSPA; LMDS application; MM-wave power PHEMT process; SHF; data transmission; four stage amplifier; grade A QPSX modulation; hub station linearity requirement; linearity performance; local multi-point distribution system; single power supply SSPA; thin film hybrid MIC; video transmission; Bandwidth; Circuits; Frequency; High power amplifiers; Linearity; PHEMTs; Power amplifiers; Power supplies; Quadrature amplitude modulation; Quadrature phase shift keying;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705058
