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The group is recruiting at postdoctoral fellow and research associate level for three roles on its Ka-band satellite work with C-COM Satellite Systems: RF and antenna design, digital signal processing for adaptive beamforming and anti-jamming, and over-the-air testbed measurement.

A framework in IEEE Transactions on Microwave Theory and Techniques evolves matching-network topologies as graphs and turns them automatically into manufacturable, EM-aware layouts. The 10 W GaN prototype spans 3.2 to 4.3 GHz with 1 GHz of instantaneous bandwidth in the n77 band.

A method in IEEE Microwave and Wireless Technology Letters estimates each element’s complex excitation from far-field measurements taken with the whole array live, so mutual coupling and loading are captured. On a 4x4 array at 38.5 GHz it beats element-by-element calibration outright.

A linearization architecture in IEEE Microwave and Wireless Technology Letters pairs a small per-antenna predistorter with a low-order pre-equalizer ahead of the precoder, cutting radiated distortion and user error vector magnitude together without a more complex precoder.

Hang Yu, Jin Gyu Lim and Mehran Hazer Sahlabadi completed their doctorates in 2026, on load-variation-resilient power amplifiers, advanced massive MIMO transmitters, and beamforming front-end circuits and systems. All three theses are available in UWSpace.

A digital predistortion framework built for the 2025 IMS Student Design Competition keeps a load-modulated balanced amplifier linear across multiple carrier configurations from a single trained model, using a complexity-reduced Volterra model and hybrid indirect–direct learning. Published in IEEE Microwave Magazine.

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Three research positions open on the C‑COM satellite phased-array project

Automated design framework delivers a GaN power amplifier linearized over 1 GHz of modulation bandwidth

Active calibration lifts phased-array gain by 1.4 dB and deepens a steered null by 21 dB

Two-tier linearization improves radiated ACPR by 10 dB in a 16-channel digital MIMO transmitter

Three doctoral theses completed

One predistorter holds its linearization across every carrier setting a load-modulated amplifier is given