NASA NTRS · 20210008525
A W-Band Spatial Power-Combining Amplifier using GaN MMICs
Abstract
In this paper, we describe a miniature powercombiner for monolithic millimetre-wave integrated circuit (MMIC) chips using spatial power-combining with cavity modes. We have designed GaN MMIC power amplifier chips for 94 GHz, and illustrate the concept of the W-Band Spatial Power Combining Amplifier (WSPCA). Using 1 Watt, 94 GHz MMIC chips in a two-way cavity mode combiner, we were able to achieve 2 Watts of output power with 9 dB gain and 15 % PAE. This technique could be extended to high power MMICs and larger numbers of chips to achieve higher output power in a compact size. The applications include earth science radar, but may be extended to other applications requiring wider bandwidth.
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Gawande, Rohit, Peralta, Alejandro, Lin, Robert, Fung, Andy, Velazco, Jose, Taylor, Mark, Samoska, Lorene A.. 2018-09-23. A W-Band Spatial Power-Combining Amplifier using GaN MMICs. https://ntrs.nasa.gov/citations/20210008525
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