Results 81 to 90 of about 424,746 (259)

First Triple‐Frequency Retrievals of Binned Raindrop Size Distributions

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Our understanding of raindrop size distributions (DSDs) aloft is largely limited, owing to a scarcity of effective measurements. In this study, a two‐step optimal estimation technique is developed for retrieving binned DSDs based on a newly developed vertically‐pointing triple‐frequency radar system. In the first step, we employ the Tridon and
Fuxin Yao, Haoran Li, Yang Zhang, Zheng Ruan, Liping Liu, Nan Wei, Yan Feng, Yong Huang   +7 more
wiley   +1 more source

Backscatter Transponder Based on Frequency Selective Surface for FMCW Radar Applications [PDF]

, 2014
This paper describes an actively-controlled frequency selective surface (FSS) to implement a backscatter transponder. The FSS is composed by dipoles loaded with switching PIN diodes. The transponder exploits the change in the radar cross section (RCS) of
Girbau, D., Lazaro, A., Lorenzo, J., Villarino, R.   +3 more
core   +1 more source

Characterizing trade‐wind shallow convection regimes in the open sea with a synergy of ship‐based vertical profiling observations

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 774, January 2026 Part A.
We use active remote sensing from a ship during the EUREC4$$ {\mathrm{EUREC}}^4 $$A campaign to characterize the environment before, during, and after precipitation in shallow convection. (1) Shallow clouds barely precipitate (only virga). Congestus clouds generate precipitation, occurring less often in the afternoon but with higher cloud fractions. (2)
Claudia Acquistapace, Sabrina Schnitt, Sibylle Krause, Nils Risse, Diego Lange, Dwaipayan Chatterjee   +5 more
wiley   +1 more source

Selecting Target Range with Accurate Vital Sign Using Spatial Phase Coherency of FMCW Radar

Applied Sciences, 2021
Respiration and heartbeat are basic indicators of the physiological state of human beings. Frequency-modulated continuous wave (FMCW) radar can sense micro-displacement in the human body surface without contact, and is used for vital-sign (respiration ...
Ho-Ik Choi, Woo-Jin Song, Heemang Song, Hyun-Chool Shin   +3 more
doaj   +1 more source

Experimental Results of a 3D Millimeter-Wave Compressive-Reflector-Antenna Imaging System

, 2018
This letter presents the first experimental results of our three-dimensional (3D) millimeter-wave (mm-wave) Compressive-Reflector-Antenna (CRA) imaging system.
Bisulco, A., Gomez-Sousa, Hipolito, Graham, Katherine, Heredia-Juesas, Juan, Martinez-Lorenzo, Jose A., Molaei, Ali, Tirado, Luis, Zhang, Weite   +7 more
core   +1 more source

Automotive radar – investigation of mutual interference mechanisms [PDF]

, 2010
In the past mutual interference between automotive radar sensors has not been regarded as a major problem. With an increasing number of such systems, however, this topic is receiving more and more attention.
H.-L. Blöcher, M. Goppelt, W. Menzel
core   +1 more source

Computationally Efficient Pruning Before Training Scheme for SNN‐Based Radar Gesture Recognition

Electronics Letters, Volume 62, Issue 1, January/December 2026.
In this work, we propose a Spike Timing‐driven Pruning before Training (ST‐PBT) method for radar‐based human gesture recognition. The proposed ST‐PBT performs a single‐shot pruning at the model initialisation, avoiding the expensive computational cost and compression time incurred in the model pre‐training. Furthermore, the ST‐PBT introduces a gradient‐
Mengjun Zhang, Bin Li, Hongfu Liu, Chenglin Zhao   +3 more
wiley   +1 more source

Microwave Imaging for Breast Cancer Detection - A Comparison Between VNA and FMCW Radar

IEEE Journal of Microwaves
This paper presents the comparison between microwave imaging for breast cancer detection using a vector network analyzer (VNA) and a frequency-modulated continuous wave (FMCW) radar system.
Martin Maier, Sebastian Paul, Milan Rother, Simona Di Meo, Marco Pasian, Joerg Schoebel, Vadim Issakov   +6 more
doaj   +1 more source

A Compact 55–66 GHz Single‐Chip FMCW Transceiver Featuring 12‐dBm Psat and >11‐GHz Tuning Range in 65‐nm SOI CMOS

Electronics Letters, Volume 62, Issue 1, January/December 2026.
This paper presents a fully‐integrated frequency‐modulated continuous‐wave (FMCW) transceiver chip operating from 55 to 66 GHz, fabricated in a 65 nm silicon‐on‐insulator (SOI) CMOS process. The chip incorporates a wide‐tuning‐range voltage‐controlled oscillator (VCO) with four digitally selectable states, a driver amplifier, a power amplifier, a low ...
Yulong Xu, Zongming Duan, Jin Xu, Yingsong Li, Bing Wu   +4 more
wiley   +1 more source

Versatile 126–182 GHz UWB D-Band FMCW Radar for Industrial and Scientific Applications

IEEE Sensors Letters, 2022
In this letter, a D-band frequency-modulated continuous wave (FMCW) radar for industrial and scientific applications is presented. It covers an ultrawide 56 GHz sweep bandwidth (126–182 GHz, 36.4%) and is based on a custom 1 TRX + 2 RX SiGe transceiver ...
S. Kueppers, T. Jaeschke, N. Pohl, J. Barowski   +3 more
semanticscholar   +1 more source