Digital beamforming solutions above 100 GHz require large arrays with high power consumption and control requirements. An alternative is to eliminate excessive amplitude and phase weight calibration p...
This work presents a novel secure communication protocol that leverages beamforming geometry and time-modulated arrays (TMAs) to guarantee arbitrarily low probability of successful eavesdropping by a ...
This work presents a new self-cooling power amplifier (PA) architecture based on active second-harmonic injection for RF transmitter systems. Unlike conventional thermal solutions that rely on bulky h...
This paper presents the first experimental validation of photonic time crystal (PTC) amplification at 1 GHz. PTCs are artificially engineered periodic structures that manipulate electromagnetic proper...
In 2022 Japan approved radiative wireless power transfer (WPT) in the sub-GHz band under a licensing regime. This technology is already being used in factory automation and building management systems...
We present a high-efficiency wireless powering architecture designed for subcortical medical implants. Conventional inductive links struggle to bridge the mid-field gap, where the power density decays...
This work presents a flexible phased array tile designed and fabricated for wireless power transfer at 10 GHz. The system is driven by custom CMOS RFICs fabricated in a 22 nm CMOS FDSOI process. The c...
This paper proposes a CMOS rectifier-type mixer where the mixing operation and rectification can be optimized independently. The proposed circuit utilizes a 24 GHz wireless power transfer (WPT) signal...
This paper presents a self-powered antenna monitoring system (AMS) that energy harvesting from a directional coupler on the downlink of a distributed antenna system (DAS). Each ceiling module operates...
A 241-271 GHz 3TX-4RX sparse and linear multi-input multi-output (MIMO) radar is demonstrated with the TX antenna spacing of 1.2 mm and the RX antenna spacings of 1.8 mm and 3.0 mm. Using coprime arra...