Title :
A 44-GHz monolithic waveguide plane-wave amplifier with improved unit cell design [using pHEMTs]
Author :
Kwon, Youngwoo ; Sovero, Emilio A. ; Deakin, Don S. ; Higgins, J. Aiden
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
9/1/1998 12:00:00 AM
Abstract :
A 44-GHz monolithic waveguide plane-wave amplifier (PWA) with improved unit cell design is presented in this paper. The unit cell is a two-stage direct-coupled design and satisfies size, bistability, and stability requirements of the waveguide PWA. The ultra-compact unit cell had a cell size of 0.8 mm2, and showed a small-signal gain of 8 dB and an output power of 15 dBm at 44 GHz with a corresponding dc-to-RF efficiency of 10%. A monolithic waveguide PWA using these unit cells showed a “flange-to-flange” gain of 5 dB, an output power of 0.3 W, and an efficiency of 2% at 44 GHz
Keywords :
HEMT integrated circuits; MMIC power amplifiers; circuit stability; field effect MIMIC; integrated circuit design; millimetre wave power amplifiers; power combiners; 0.3 W; 10 percent; 2 percent; 44 GHz; 5 dB; 8 dB; bistability; cell size; dc-to-RF efficiency; flange-to-flange gain; mm-wave amplifiers; output power; pHEMTs; small-signal gain; stability requirements; two-stage direct-coupled design; unit cell design; waveguide plane-wave amplifier; Dipole antennas; Frequency; Gain; Heterojunction bipolar transistors; Millimeter wave technology; Millimeter wave transistors; Planar waveguides; Power amplifiers; Power generation; Stability;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
