Results 11 to 20 of about 57,900 (293)
A survey of mechanical antennas applied for low-frequency transmitting
iScience, 2023 Summary: The mechanical antenna (MA) is a new type of low-frequency (LF) transmitting antenna that generates an alternating electromagnetic (EM) signal through the mechanical movement of electric charges or magnetic dipoles, which is an interdisciplinary
Yong Cui +6 more
doaj +3 more sources
The Approximate Capacity of the MIMO Relay Channel [PDF]
, 2014 Capacity bounds are studied for the multiple-antenna complex Gaussian relay channel with t1 transmitting antennas at the sender, r2 receiving and t2 transmitting antennas at the relay, and r3 receiving antennas at the receiver.
Jin, Xianglan, Kim, Young-Han
core +1 more source
Experimental study of depolarization and antenna correlation in tunnels in the 1.3 GHz band [PDF]
, 2019 Measurements have been carried out in a low-traffic road tunnel to investigate the influence of the polarization of the transmitting and receiving antennas on the channel characteristics. A real-time channel sounder working in a frequency band around 1.3
Challita, Frederic +5 more
core +4 more sources
Solar-Terrestrial Physics, 2019 When developing the first topside ionosphere sounding stations, the issue was debated concerning the improvement of the electromagnetic compatibility of such devices through the use of chirp signals.
Podlesnyi A.V. +2 more
doaj +1 more source
Delivering live-action to handheld devices: experimental results and recommendations [PDF]
, 2009 This paper addresses the broadcast capabilities of WiFi systems transmitting to handheld devices. The analysis includes a comparison of different antennas at the access point (AP) in terms of received signal strength indication (RSSI) for different ...
Bull, DR +3 more
core +2 more sources
Intelligent Surface-Aided Transmitter Architectures for Millimeter-Wave Ultra Massive MIMO Systems
IEEE Open Journal of the Communications Society, 2021 In this article, we study two novel massive multiple-input multiple-output (MIMO) transmitter architectures for millimeter wave (mmWave) communications which comprise few active antennas, each equipped with a dedicated radio frequency (RF) chain, that ...
Vahid Jamali +4 more
doaj +1 more source
Asymptotics of transmit antenna selection: Impact of multiple receive antennas [PDF]
2017 IEEE International Conference on Communications (ICC), 2017 Consider a fading Gaussian MIMO channel with $N_\mathrm{t}$ transmit and $N_\mathrm{r}$ receive antennas. The transmitter selects $L_\mathrm{t}$ antennas corresponding to the strongest channels. For this setup, we study the distribution of the input-output mutual information when $N_\mathrm{t}$ grows large.
Asaad, Saba +3 more
openaire +2 more sources
Serial Patch Array Antenna for an FMCW Radar Housed in a White Cane
International Journal of Antennas and Propagation, 2016 The design, realization, and test of the transmitting and receiving antennas for an FMCW radar operating between 24 and 24.25 GHz (ISM band), to be housed in a white cane for improving mobility of visually impaired subjects, have been performed.
Stefano Pisa +2 more
doaj +1 more source
OAM multiple transmission using uniform circular arrays: numerical modeling and experimental verification with two digital television signals [PDF]
, 2016 In this work we present the outcomes of a radio-frequency OAM transmission between two antenna arrays performed in a real-world context. The analysis is supplemented by deep simulative investigations able to provide both a preliminary overview of the ...
Cagliero, Andrea +3 more
core +2 more sources
Design of planar four-antenna system for single soldier handheld terminal
Dianzi Jishu Yingyong, 2021 The planar integration design of the antenna system for soldier terminals is presented in this paper based on the requirements of the miniaturization and high integration. A four-antenna system including recieving and transmitting Ad-Hoc network antennas,
Zhou Wenhui
doaj +1 more source