Yongzhi Sun

TL;DR: Different from the frequency-domain “micro-Doppler” approach, the proposed remote gesture recognition based on linear motion reconstruction is able to recognize definitive signatures for the corresponding motions, exhibiting promising potential in practical applications of human-computer interaction.

TL;DR: In this paper, the authors explore the use of configurable electrically induced transparency to construct a microwave "diffractive medium" whose air-like optimally matched transparency and metal-like optimal reflective opacity can be conveniently switched by a binary dc voltage.

TL;DR: An extended differentiate and cross-multiply algorithm is introduced to solve the null point and the codomain restriction issues in traditional Doppler radar sensors, and retrieve the Dopplers bio-signals of a moving hand from the demodulated phase signals based on a configuration of 2 or 3 radar sensors for 2-D or 3-D HGRs.

TL;DR: In this paper, a noncontact measurement of complex permittivity for electrically small samples at microwave frequencies is proposed based on Rayleigh approximation, which can linearly retrieve the permittivities from the measured impedance change.

TL;DR: In this paper, a frequency and beam-reconfigurable lens antenna based on an active second-order bandpass frequency-selective surface (FSS) is proposed. But the antenna is composed of three nonresonant metallic layers separated by two thin dielectric substrate.