Featuring one of the highly cited papers published in IEEE Transactions on Microwave Theory and Techniques in 2022. A 27–31-GHz 1024-Element Ka-Band SATCOM Phased-Array Transmitter With 49.5-dBW Peak EIRP, 1-dB AR, and ±70° Beam Scanning, presents a state-of-the-art 1024-element Ka-Band SATCOM Phased-Array Transmitter with remarkable features.

This article proposes MetaBreath: a multitarget and high-resolution respiration detection method based on space-time-coding (STC) digital metasurface. Experiments show that MetaBreath enables respiration detection and separation whether people sit apart or close together, which is reflected in the recovered waveform keeping consistent with ground truth. MetaBreath is expected to apply to sleeping monitoring, life detection, and baby care.

A polarimetric millimeter-wave radar imaging technique is proposed to remotely detect, localize, and wirelessly read a novel additively manufactured passive sensor composed of a microfluidic channel filled with liquid metal Galinstan. Very high variation of the radar-cross section of the sensor to small variations of the level of Galinstan in the channel is obtained. Indeed, at the radar-to-sensor distance of 2.4 m, the measured radar echo level of the sensor varies by 4.5 dB when the level of Galinstan changes by 1 mm.

This work presents a focal plane array (FPA) for terahertz imaging applications with a near diffraction-limited resolution achieved through a very tight sampling of the focal plane. The antenna array is integrated with direct-detectors in a 22nm CMOS technology and operates from 200GHz to 600GHz. Measurements showed that an aperture efficiency of -4.1dB was realized at 400GHz. The average gain roll-off between two diagonally adjacent array elements was measured to be -1.5dB at 400GHz.

This paper presents an approach to millimeter-wave electrical comb generators with frequency-adjustable tone spacing and a tunable RF center frequency. The spectrum of a series of repetitive pulses with an ultrawideband (UWB) mixer to demonstrate a stable electrical comb is upconverted from 140 GHz to 220 GHz, with 500 MHz and 2 GHz frequency spacings. This upconverted comb can be used as a phase reference at millimeter-wave frequencies once an accurate characterization of the phase of its spectrum is available.