Results 21 to 30 of about 878,822 (292)

3D Absorptive Frequency-Selective Reflection and Transmission Structures With Dual Absorption Bands

open access: yesIEEE Access, 2018
This paper presents a 3D absorptive frequency-selective reflection structure (AFSR) and absorptive frequency-selective transmission structure (AFST) with one reflection/transmission band and two absorption bands.
Yufeng Yu   +6 more
doaj   +1 more source

Nonreciprocal Reconfigurable Microwave Optomechanical Circuit [PDF]

open access: yes2018 International Conference on Optical MEMS and Nanophotonics (OMN), 2017
AbstractNonreciprocal microwave devices are ubiquitous in radar and radio communication and indispensable in the readout chains of superconducting quantum circuits. Since they commonly rely on ferrite materials requiring large magnetic fields that make them bulky and lossy, there has been significant interest in magnetic-field-free on-chip alternatives,
N. R. Bernier   +7 more
openaire   +7 more sources

Tuning of a superconducting microwave resonator at 77 K using an integrated micromachined silicon vertical actuator [PDF]

open access: yes, 2010
A silicon micromachined actuator is used to tune a high temperature superconducting microwave resonator. The superconducting resonator is only 1.24 mm x 0.66 mm and demonstrates a Q of up to 1078 at 6.3 GHz and at 77 K.
Y Wang   +14 more
core   +1 more source

The prospects of creating of microwave radiothermography based on monolithic integrated circuits [PDF]

open access: yesITM Web of Conferences, 2019
A new approach to the creation of microwave radiothermography is shown. Scientific and technical barriers preventing the creation of relatively inexpensive devices for early diagnosis of tumors, as well as painless and safe monitoring during treatment ...
Gudkov Aleksandr
doaj   +1 more source

Integration Design of Millimeter-Wave Filtering Patch Antenna Array With SIW Four-Way Anti-Phase Filtering Power Divider

open access: yesIEEE Access, 2019
In this paper, the integration design of a millimeter-wave filtering patch antenna array fed by a substrate integrated waveguide (SIW) four-way anti-phase filtering power divider is proposed.
Huayan Jin   +4 more
doaj   +1 more source

Compact Dual-Broadband Dual-Polarized Antenna With Additional Ground Platform

open access: yesIEEE Access, 2019
A compact dual-polarized antenna element covering the frequency bands of 0.773~1.0405 GHz and 1.69~2.83 GHz is proposed in this paper. The nested scheme is adopted and the performances of the lower- and upper-band element are analyzed, respectively.
Xi Wang Dai   +4 more
doaj   +1 more source

Vertically‐integrated differential filtering patch antenna excited by a balun bandpass filter

open access: yesIET Microwaves, Antennas & Propagation, 2019
This study develops a differential‐fed filtering patch antenna, which features superior frequency selectivity, compact size, low cross‐polarisation, and symmetrical radiation patterns. The proposed antenna consists of a rectangular patch on the top layer,
Huayan Jin   +5 more
doaj   +1 more source

An optimization design scheme applied to multi-modules cascading of transceiver IC

open access: yesDianzi Jishu Yingyong
In this paper, a novel optimization design scheme is proposed to solve the cascading mismatch problem of sub-circuits in beamforming chips due to parasitic effects.
Yu Qiushi   +9 more
doaj   +1 more source

3D Printed Alumina for Low-Loss Millimeter Wave Components

open access: yesIEEE Access, 2019
This paper compares the performance of three different materials and processing techniques suitable for low-loss mm-Wave components. The comparison is made by fabricating the same 2D photonic crystal structure in the W-band. Rogers RT/duroid® 6010.
Alejandro Jimenez-Saez   +7 more
doaj   +1 more source

Delay-line stabilized microwave oscillator with frequency control [PDF]

open access: yes, 1997
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.The technique whereby the frequency of an oscillator is stabilized using an external feedback network incorporating a delay-line is extended in this thesis ...
Free, Charles Edward
core   +7 more sources

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