Yw. Kwon et al., A 44-GHZ MONOLITHIC WAVE-GUIDE PLANE-WAVE AMPLIFIER WITH IMPROVED UNIT-CELL DESIGN, IEEE transactions on microwave theory and techniques, 46(9), 1998, pp. 1237-1241
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-s
tage direct-coupled design and satisfies size, biasability, and stabil
ity requirements of the waveguide PWA. The ultra-compact unit cell had
a cell size of 0.8 mm(2), 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 effi
ciency of 10%. A monolithic waveguide PWA using these unit cells showe
d a ''flange-to-flange'' gain of 5 dB, an output power of 0.3 W, and a
n efficiency of 2% at 44 GHz.