Results 1 to 10 of about 1,709,207 (373)

Wavelength Modulation Characteristics of Metal Gratings on Si-Based Blocked-Impurity-Band (BIB) Terahertz Detectors

open access: yesMicromachines, 2022
In this work, the wavelength selection characteristics of metal gratings on Si-based blocked-impurity-band (BIB) detectors in the terahertz band were studied by performing experiments and a finite difference time domain (FDTD) simulation.
Yulu Chen   +9 more
doaj   +1 more source

The Anti-Reflection Coating Design for the Very-Long-Wave Infrared Si-Based Blocked Impurity Band Detectors

open access: yesCrystals, 2022
An anti-reflection coating on a back-illuminated 128 × 128 array Si-based blocked impurity band (BIB) detector in a very-long-wave infrared range was designed in this work. The reflectance and transmittance spectra of ZnS films with different thicknesses
Zuoru Dong   +8 more
doaj   +1 more source

Novel Technique of Gap Waveguide Cavity Resonator Sensor with High Resolution for Liquid Detection

open access: yesInternational Journal of Antennas and Propagation, 2022
This article proposes a novel microfluidic sensor designed with a highly accurate Q-factor for liquid detection. The proposed sensor is developed and implemented with a gap waveguide cavity resonator (GWCR) approach.
Ammar Alhegazi   +8 more
doaj   +1 more source

The Incident Field Optimization Method for the Electromagnetic Inverse Problems

open access: yesInternational Journal of Antennas and Propagation, 2022
In this letter, an incident field optimization (IO) method integrated with contrast source inversion (CSI) method and multiplicative regularized CSI (MR-CSI) method is proposed to deal with the electromagnetic inverse problems.
Hao Li, Lijia Chen, Jinghui Qiu
doaj   +1 more source

Highly Efficient Calibration of Antenna Arrays by Active Targets in the Near-Field

open access: yesIEEE Open Journal of Antennas and Propagation, 2023
To enhance the capabilities of high-resolution imaging or beamforming, the trend goes towards arrays with high-channel count and large aperture sizes.
Matthias Linder   +4 more
doaj   +1 more source

A 3D Printed Ka-Band High-Efficiency Wide-Slit Antenna Array for High-Power Microwave Applications

open access: yesInternational Journal of Antennas and Propagation, 2022
A Ka-band high-power waveguide wide-slit antenna array with high efficiency and high-power capacity is proposed in this paper. The antenna uses a waveguide vertical transition structure as a part of the feed network, which improves the compactness and ...
Liang Liu   +5 more
doaj   +1 more source

Flexible Direction-of-Arrival Simulation for Automotive Radar Target Simulators

open access: yesIEEE Journal of Microwaves, 2021
In order to simulate realistic traffic scenarios, a radar target simulator must be able to generate multiple radar targets with different directions of arrival.
Pirmin Schoeder   +4 more
doaj   +1 more source

UAV-Based Bistatic SAR-Imaging Using a Stationary Repeater

open access: yesIEEE Journal of Microwaves, 2023
Synthetic aperture radar (SAR) is an established technique for high-resolution radar imaging relying on the ego-motion of the radar. The long coherent integration time of the radar in conjunction with a linear or circular trajectory enables the ...
Alexander Grathwohl   +4 more
doaj   +1 more source

Assessment of Efficiency of Drying Grain Materials Using Microwave Heating [PDF]

open access: yes, 2019
We present results of experimental work on studying the drying of a dense layer of grain using microwave heating. We investigated a series of techniques to supply heat to grain to assess energy efficiency of a microwave field.
Boshkov, L. (Leonid)   +4 more
core   +4 more sources

Mutual Interference of Automotive OFDM Radars—Analysis and Countermeasures

open access: yesIEEE Journal of Microwaves, 2021
Due to its noise-like signal property, digital orthogonal frequency-division multiplexing (OFDM) radars are often assumed to be robust against interference.
Benedikt Schweizer   +4 more
doaj   +1 more source

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