Results 21 to 30 of about 726,451 (313)

Millimeter-Wave MMICs and Applications [PDF]

, 2003
As device technology improves, interest in the millimeter-wave band grows. Wireless communication systems migrate to higher frequencies, millimeter-wave radars and passive sensors find new solid-state implementations that promise improved performance ...
Morgan, Matthew Alexander
core   +1 more source

Space-time-coding digital metasurfaces

Nature Communications, 2018
Current digital coding metasurfaces are only space-encoded. Here, the authors propose space-time modulated digital coding metasurfaces to obtain simultaneous manipulations of electromagnetic waves and present harmonic beam steering, beam shaping, and ...
Lei Zhang, Xiao Qing Chen, Shuo Liu, Qian Zhang, Jie Zhao, Jun Yan Dai, Guo Dong Bai, Xiang Wan, Qiang Cheng, Giuseppe Castaldi, Vincenzo Galdi, Tie Jun Cui   +11 more
doaj   +1 more source

Patch Antenna Loaded With Paired Shorting Pins and H-Shaped Slot for 28/38 GHz Dual-Band MIMO Applications

IEEE Access, 2020
A novel dual-band patch antenna operating at 28/38 GHz is proposed for multiple-input multiple-output (MIMO) communication systems in this paper. The antenna utilizes substrate integrated waveguide (SIW) transmission line as the feed by means of a ...
Pengfei Liu, Xiao-Wei Zhu, Yan Zhang, Xiang Wang, Chunfeng Yang, Zhi Hao Jiang   +5 more
doaj   +1 more source

Millimeter-Wave Antennas for 5G [PDF]

2018 11th Global Symposium on Millimeter Waves (GSMM), 2018
The fifth generation (5G) wireless communications systems have brought a growing need for various antennas, electrically small and large, low-gain and large-gain, also at millimeter wavelengths, and in many cases with beam steering or switching capability.
Zheng, Jianfang, Ala-Laurinaho, Juha, Karki, Sabin, Viikari, Ville, Räisänen, Antti   +5 more
openaire   +2 more sources

Shaping electromagnetic waves using software-automatically-designed metasurfaces

Scientific Reports, 2017
We present a fully digital procedure of designing reflective coding metasurfaces to shape reflected electromagnetic waves. The design procedure is completely automatic, controlled by a personal computer.
Qian Zhang, Xiang Wan, Shuo Liu, Jia Yuan Yin, Lei Zhang, Tie Jun Cui   +5 more
doaj   +1 more source

Millimeter-wave detection of landmines

SPIE Proceedings, 2013
Millimeter wave absorption relative to background soil can be used for detection landmines with little or no metal content. At these frequencies, soil and landmine absorb electromagnetic energy differently. Stepped frequency measurements from 20 GHz to 60 GHz were used to detect buried surrogate landmines in the soil.
Ozturk, Hilmi, Nazli, Hakki, Yegin, Korkut, Bicak, Emrullah, Sezgin, Mehmet, Dag, Mahmut, Turetken, Bahattin   +6 more
openaire   +3 more sources

Resonant-Tunneling Diode with Spiral Bias Connections for Circularly Polarized Radiation

, 2023
Resonant-tunneling diodes (RTDs) are promising electronic sources for terahertz wireless communications. A recently proposed RTD with a series-fed patch array indicates that surface waves can propagate along the extended biasing structure. In this paper,
Fumeaux, C., Suzuki, S., Li, M.S., Withayachumnankul, W.   +3 more
core   +1 more source

A compact high‐sensitivity tangential E‐probe with resonator and coupled balun

Electronics Letters, 2022
A compact high‐sensitivity probe for sensing up tangential E‐field is proposed and measured in this paper. The probe consists of an electric dipole with patches used to induce the tangential E‐field, a resonator made up of open circuit stubs (capacitor ...
Shang Zhang, Zhenguo Liu, Zhipeng Chen, Mengzi Li, Weibing Lu   +4 more
doaj   +1 more source

Convolution operations on time-domain digital coding metasurface for beam manipulations of harmonics

Nanophotonics, 2020
Time-domain digital coding metasurfaces have been proposed recently to achieve efficient frequency conversion and harmonic control simultaneously; they show considerable potential for a broad range of electromagnetic applications such as wireless ...
Zhang Cheng, Yang Jin, Yang Liu Xi, Ke Jun Chen, Chen Ming Zheng, Cao Wen Kang, Chen Mao, Wu Zhan Hao, Chen Jian Feng, Cheng Qiang, Cui Tie Jun   +10 more
doaj   +1 more source

Analysis of Millimeter-Wave Polarization Diverse MIMO Capacity

, 2014
Millimeter-waves offer the possibility of wide bandwidth and consequently high data rate for wireless communications. For both uni- and dual-polarized systems, signals sent over a link may suffer severe degradation due to antenna misalignment.
Nicholas P. Lawrence, Ng, B.W.H., Abbott, D., Brian W.-H. Ng, Derek Abbott, Hedley J. Hansen, Lawrence, N.P., Hansen, H.J.   +7 more
core   +1 more source