Title :
A Ka-band compact 1 watt power amplifier using a Platy-TRL matching method
Author :
Chaki, Shin ; Hisaka, Takayuki ; Hirai, Tetsuo ; Sasaki, Yoshinobu ; Sakamoto, Susumu ; Mitsui, Yasuo
Author_Institution :
High Frequency & Opt. Semicond. Div., Mitsubishi Electr. Corp., Hyogo, Japan
Abstract :
A fully-matched two-stage power amplifier MMIC has been successfully developed operating with the frequency range from 27 GHz to 29 GHz. Platy-transmission lines with low characteristic impedance have been utilized for matching at an intermediate stage and an output one in order to accomplish a compact chip area. Four HEMTs have been combined at an output stage in the developed MMIC. A difference in load impedance at each input port is suppressed by two short stubs in the final output circuit. The stubs are also effective for coincidence of through-phases between four input ports and an output port of the final output circuit. The amplifier has a linear gain of 8 dB and an output power of greater than 30 dBm at 29 GHz. The ultra compact chip area of 1.6 × 1.8 mm 2 has been achieved using the platy-TRL matching method (PTMM). The developed MMIC using the PTMM will be able to be applied to a higher output power amplifier as a basic cell that has an output power of 1 watt
Keywords :
HEMT integrated circuits; MMIC power amplifiers; field effect MMIC; impedance matching; integrated circuit layout; transmission lines; 1 W; 27 to 29 GHz; 8 dB; HEMT MMIC; Ka-band fully-matched two-stage power amplifier MMIC; Platy-TRL matching method; Platy-transmission lines; compact chip area; intermediate stage; linear gain; load impedance difference suppression; low characteristic impedance; output power; output stage; short stubs; through-phase coincidence; Circuits; Frequency; Gain; HEMTs; High power amplifiers; Impedance; MMICs; MODFETs; Power amplifiers; Power generation;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985642
