Title :
A novel MMIC power amplifier for pocket-size cellular telephones
Author :
Muraguchi, M. ; Nakatsugawa, M. ; Aikawa, M.
Author_Institution :
NTT Radio Commun. Syst. Lab., Kanagawa, Japan
Abstract :
A novel MMIC (monolithic microwave integrated circuit) power amplifier for cellular telephones is proposed. The amplifier, called UBIC-PA (unbalanced bias cascode power amplifier), makes very compact monolithic integration possible in spite of the considerably low frequency of 900 MHz. The UBIC-PA has more than 40 dB gain, 29 dBm output power, and 62% power added efficiency at the supplied voltage of 6 V. The chip size of the MMIC without an output matching circuit is 2.4*2.4 mm. The size and cost of the UBIC-PA module is estimated at about 1/6 (0.2 cc) and 1/2 that of the former hybrid PA module. Moreover, the UBIC-PA improves power dissipation by more than 50% under medium and low output power conditions. This is very important for cellular telephones using adaptive transmitter power control for battery saving.<>
Keywords :
MMIC; cellular radio; microwave amplifiers; power amplifiers; 6 V; 62 percent; 900 MHz; MMIC power amplifier; UBIC-PA; adaptive transmitter power control; chip size; pocket-size cellular telephones; power added efficiency; power dissipation; unbalanced bias cascode power amplifier; Frequency; Gain; MMICs; Microwave amplifiers; Microwave integrated circuits; Monolithic integrated circuits; Power amplifiers; Power generation; Telephony; Voltage;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.276755
