Results 1 to 10 of about 185,058 (261)
A Dual-Band Dual-Circular-Polarization Antenna for Ka-Band Satellite Communications [PDF]
IEEE Antennas and Wireless Propagation Letters, 2017 A novel Ka-band dual-band dual-circularly-polarized antenna array is presented in this letter. A dual-band antenna with left-hand circular polarization for the Ka-band downlink frequencies and right-hand circular polarization for the Ka-band uplink frequencies is realized with compact annular ring slots. By applying the sequential rotation technique, a
Raphaël Gillard, Langis Roy
exaly +4 more sources
Dual-Band Infrared PbS Colloidal Quantum Dot Focal Plane Array [PDF]
Nature CommunicationsNear-infrared and short-wave infrared dual-band detection has emerged as a pivotal enabling technology in across diverse applications spanning material identification, biological diagnostics, and machine vision.
Yunxiang Di +20 more
doaj +2 more sources
IEEE Access, 2019 This paper presents a compact dual-band ±45° dual-polarized base-station array based on embedded filtering elements. The proposed antenna array consists of 9 dual-band antenna units, which operate at the lower band (LB) of 790-862 MHz and ...
Wen Duan +4 more
doaj +3 more sources
IEEE Photonics Journal, 2021 We propose a photonic method to generate and transmit dual-band dual-chirp microwave waveforms based on a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM).
Lu Wang +6 more
doaj +1 more source
Photonic Generation of Switchable Dual-Band Dual-Chirp Microwave Waveforms
IEEE Photonics Journal, 2022 In this article, a photonic scheme based on dual-drive dual-parallel Mach-Zehnder modulator (DD-DPMZM) to generate switchable dual-band dual-chirp microwave waveforms is proposed and experimentally demonstrated.
Shuaiquan Yu +3 more
doaj +1 more source
Dual-Band Dual-Linearly Polarized Transmitarray at Ka-Band
2020 50th European Microwave Conference (EuMC), 2021 We present here the design and optimization of a dual-band dual linearly-polarized transmitarray antenna with a 1bit phase resolution (i.e. two phase states with 180° of relative phase-shift). The antenna operates in both downlink and uplink K/Ka-bands (17 – 21 GHz for the lower frequency band, and 27 – 31 GHz for the upper one) and could be used for ...
Madi, Reda +2 more
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ISPRS International Journal of Geo-Information, 2021 Since many Wi-Fi routers can currently transmit two-band signals, we aimed to study dual-band Wi-Fi to achieve better positioning results. Thus, this paper proposes a fingerprint positioning method for dual-band Wi-Fi based on Gaussian process regression
Hongji Cao +5 more
doaj +1 more source
A Novel Dual Band Branch Line Coupler and its Application to Design a Dual Band 4 × 4 Butler Matrix
IEEE Access, 2020 A novel dual band branch line coupler (BLC) has been proposed, designed, implemented, and analyzed in this paper. A dual band 4 $\times 4$ Butler matrix (BM) has also been developed by employing the proposed BLC.
Aijaz M. Zaidi +4 more
doaj +1 more source
Advanced Electromagnetics, 2020 This work proposes a design of compact filter-antenna with fixed and frequency-agile bands for wireless communications and cognitive radio (CR) systems.
H. A. Atallah
doaj +1 more source
Dual-polarized dual-band antenna element for ISM bands [PDF]
2009 IEEE Antennas and Propagation Society International Symposium, 2009 A dual-band element that operates in two separate industrial, scientific, and medical (ISM) bands is presented that provides dual-linear or dual-circular polarization in each band. The element is ideal for wireless communication applications utilizing multiple protocol and/or Bluetooth technology.
Dorsey, W. M., Zaghloul, A. I.
openaire +2 more sources