Results 11 to 20 of about 195,143 (348)

Millimeter-wave achromatic half-wave plate [PDF]

Applied Optics, 2005
In print - Applied Optics, 14 pages, 7 ...
Hanany, S., Hubmayr, J., Johnson, B. R., Matsumura, T., Oxley, P., Thibodeau, M.   +5 more
openaire   +3 more sources

Decoupling for Millimeter-Wave Array Antennas Using Near-Field Shrinking Dielectric Superstrate

IEEE Open Journal of Antennas and Propagation, 2023
A decoupling concept of near-field shrinking dielectric superstrate (NFSDS) is proposed for large-scale, wideband, and dual-polarized mm-wave arrays.
Shengyuan Luo, Yiming Zhang, Peng Mei, Gert Frolund Pedersen, Shuai Zhang   +4 more
doaj   +1 more source

Spatial Resolution and Data Integrity Enhancement of Microwave Radiometer Measurements Using Total Variation Deconvolution and Bilateral Fusion Technique

Remote Sensing, 2022
Passive multi-frequency microwave sensors are indispensable instruments for worldwide environmental monitoring. However, they often suffer from the issues of poor spatial resolution and the original land–sea transition zone data are contaminated severely.
Weidong Hu, Zhiyu Yao, Shi Chen, Zhihao Xu, Yang Liu, Zhiyan Feng, Leo Ligthart   +6 more
doaj   +1 more source

Very compact millimeter sizes for composite star-forming/AGN submillimeter galaxies [PDF]

, 2017
We report the study of far-IR sizes of submillimeter galaxies (SMGs) in relation to their dust-obscured star formation rate (SFR) and active galactic nuclei (AGN) presence, determined using mid-IR photometry. We determined the millimeter-wave ($\lambda_{\
Aretxaga, Itziar, Bisigello, Laura, Caputi, Karina, Dunlop, James S., Hatsukade, Bunyo, Hughes, David H., Ikarashi, Soh, Iono, Daisuke, Ivison, R. J., Izumi, Takuma, Kashikawa, Nobunari, Kawabe, Ryohei, Kohno, Kotaro, Koyama, Yusei, Lagos, Claudia D. P., Motohara, Kentaro, Nakanishi, Kouichiro, Ohta, Kouji, Tamura, Yoichi, Umehata, Hideki, Wilson, Grant W., Yabe, Kiyoto, Yun, Min S.   +22 more
core   +3 more sources

Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom

IEEE Open Journal of Antennas and Propagation, 2022
In this paper, a dual-band antenna at 4.5 GHz and 25 GHz is presented. The antenna is a low-frequency phased patch antenna array combined with a high-frequency transmitarray with a fixed beam.
Daniel Edelgaard Serup, Gert Frolund Pedersen, Shuai Zhang   +2 more
doaj   +1 more source

A High-Precision Hybrid Analog and Digital Beamforming Transceiver System for 5G Millimeter-Wave Communication

IEEE Access, 2019
In this paper, the development of a millimeter-wave hybrid beamforming (HBF) transceiver system for 5G millimeter-wave multiple-input-multiple-output (MIMO) communication is presented.
Ruoqiao Zhang, Jianyi Zhou, Ji Lan, Binqi Yang, Zhiqiang Yu   +4 more
doaj   +1 more source

Superheterodyne-inspired waveguide-integrated metasurfaces for flexible free-space light manipulation

Nanophotonics, 2022
Metasurfaces have attracted significant attention in recent years due to their unprecedented light-manipulation abilities. However, most metasurfaces so far have relied on external light excitation, prohibiting them from full on-chip integration ...
Wu Geng-Bo, Zhu Shu-Yan, Pang Stella W., Chan Chi Hou   +3 more
doaj   +1 more source

User Impact on Phased and Switch Diversity Arrays in 5G Mobile Terminals

IEEE Access, 2018
In this paper, a mobile terminal phased array at 28 GHz with different scan angles is compared with a switch diversity antenna array at 28 GHz in the case of antenna beams pointing at the user's body.
Igor Syrytsin, Shuai Zhang, Gert Frolund Pedersen   +2 more
doaj   +1 more source

A Non-Linear Correction Method for Terahertz LFMCW Radar

IEEE Access, 2020
The nonlinearity in terahertz (THz) linear frequency modulated continuous wave (LFMCW) radar usually blurs the range profile and decreases the signal to noise ratio, hampering applications where high range-resolution is particularly emphasized.
Yade Li, Weidong Hu, Xin Zhang, Yunzhang Zhao, Jiaqi Ni, Leo P. Ligthart   +5 more
doaj   +1 more source

Wide-Band and Wide-Angle Scanning Phased Array Antenna for Mobile Communication System

IEEE Open Journal of Antennas and Propagation, 2021
A wide-band phased array antenna with wide-angle scanning capability for mobile communication system is proposed in this article. An air cavity is properly embedded into the substrate under each array element.
Guangwei Yang, Yiming Zhang, Shuai Zhang
doaj   +1 more source