IEEE IMAS 2026 Recent Applications of MMICs in Advanced Communications System Workshop

Dr. Gamal Hegazi earned his B.Sc. and M.Sc. in Electronics and Communications from the Faculty of Engineering of Ain Shams University, and his Ph.D. from the University of Massachusetts in Amherst, Massachusetts.

He held various research and technical leadership positions at Comsat Corporation, Motorola, Rockwell Collins, Aethercomm Frontgrade and Qorvo.

He has been President of Hegazi Consulting, LLC since its foundation in 2020, where he currently provides design and analysis services covering applied research and development in the microwaves and communications areas.

Modern RF transmit/receive (T/R) systems incorporate a wide range of MMIC technologies that implement critical functions throughout both the high-power transmit chain and the low-noise receive chain, extending operation into the millimeter-wave frequency spectrum.

This presentation reviews key MMIC building blocks and illustrates their integration within a representative Ka-band communication system architecture.

A millimeter-wave exciter is presented in which a digitally generated baseband waveform is converted to an analog signal and up-converted to Ka-band using a frequency mixer driven by a synthesized local oscillator.

The local oscillator is generated by a phase-locked loop (PLL), frequency multiplied, amplified, and filtered prior to the mixing stage. The transmitter utilizes this exciter to drive a power amplifier chain connected to the antenna through a transmit/receive (T/R) switching network.

On the receive side, the same antenna is shared through the T/R switch, feeding a low-noise amplifier (LNA) chain followed by frequency down-conversion and digitization for digital signal processing.

The RF front end interfaces with the digital baseband subsystem through a high-performance, wideband multi-channel transceiver chip integrating four RF-sampling transmit channels, four RF-sampling receive channels, and two RF-sampling feedback channels.

The presentation highlights recent advances in MMIC technologies for frequency generation, frequency conversion, amplification, switching, and system integration, demonstrating their role in enabling next-generation wideband communication systems.