As wireless sensing and communications technologies continue to advance, the limited
bandwidth in the microwave and millimeter-wave spectra has sparked new research in …

Passive sensing leverages ambient electromagnetic energy to detect target metrics such as
distance or motion, reducing the spectral footprint for sensor networks. Recent …

Indoor passive radar has gained traction as a method for measuring small-amplitude
motions without requiring a cooperative signal to be transmitted by the sensor. Ubiquitous …

Passive radar has gained considerable interest as a mechanism of characterizing small
motions using ambient electromagnetic (EM) energy. Compared to traditional Doppler radar …

Non-contact vibration detection using microwave radar is becoming a popular research
area. However, vibration sensing using Doppler radar based measurements suffers from the …

This paper reviews recent progress of portable short-range noncontact microwave radar
systems for motion detection, positioning, and imaging applications. With the continuous …

The use of radio-frequency signals for passive indoor applications has gained significant
interest over the last years. By leveraging ubiquitous Wi-Fi signals, the Doppler information …

Passive radars opportunistically capture communications signals to detect and track targets
in the environment. Since Wi-Fi signals are widely available today, they can be used by …

Sensing technology plays a crucial role in bridging the physical and digital worlds. By
transforming a multitude of physical phenomena into digital data, it significantly enhances …

A 24-GHz phased array for indoor smart radar is proposed in this paper. This array consists
of 6 horizontally placed antenna elements. Each antenna element is a vertically placed 5 …