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A 4-W X-band compact coplanar high-power amplifier MMIC with 18-dB gain and 25% PAE

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5 Author(s)
Bessemoulin, A. ; United Monolithic Semicond., Orsay, France ; Quay, R. ; Ramberger, S. ; Massler, H.
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The performance of a compact coplanar microwave monolithic integrated circuit (MMIC) amplifier with high output power in the X-band is presented. Based on our 0.3-μm gate-length GaAs power pseudomorphic high electron mobility transistor (PHEMT) process on 4-in wafer, this two-stage amplifier, having a chip size of 16 mm2, averages 4-W continuous-wave (CW) and 25% mean power-added efficiency (PAE) in the X-band, with more than 18-dB linear gain. Peak output powers of P-1dB=36.3dBm (4.3 W) and Psat of 36.9 dBm (4.9 W) at 10 GHz with a PAE of 50% were also measured. Compared to previously reported X-band coplanar high-power amplifiers, this represents a chip size reduction of 20%, comparable to the size of compact state-of-the-art microstrip power amplifiers.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:38 ,  Issue: 9 )