Results 101 to 110 of about 31,794 (223)
Strongly correlated wave functions for artificial atoms and molecules
, 2002 A method for constructing semianalytical strongly correlated wave functions for single and molecular quantum dots is presented. It employs a two-step approach of symmetry breaking at the Hartree-Fock level and of subsequent restoration of total spin and ...
Constantine Yannouleas +8 more
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Deep Optimization for Spectrum Repacking
, 2017 Over 13 months in 2016-17 the FCC conducted an "incentive auction" to repurpose radio spectrum from broadcast television to wireless internet. In the end, the auction yielded $19.8 billion, $10.05 billion of which was paid to 175 broadcasters for ...
Fréchette, Alexandre +2 more
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IEEE AccessA triple-band, coaxial-fed, slotted microstrip patch antenna with metasurface loading is presented in this article. The first frequency band covers the 865-868MHz European UHF-RFID band, the second frequency band partially covers the 3300-4200MHz n77 and
Sayan Sarkar, Bhaskar Gupta
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A design method of composite pixel-like antenna based on improved bald eagle search algorithm
Diance yu yibiaoThe performance of ultra-high frequency (UHF) antennas is crucial to the detection effect of UHF sensors. UHF composite antennas integrate different fractal structures, striving to retain the advantages of multiple structures.
WANG Yongqiang, LIU Bingqi, ZHU Bolin
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Efficient Spectrum Utilization of Uhf Broadcast Band
, 2014 The UHF band between 470-790 MHz, currently occupied by digital ter- restrial TV (DTT) distribution in Europe, is widely regarded as a premium spectrum band for providing mobile coverage. With the exponential increase in wireless data traffic in recent years, there has been growing interests in gaining access to this spectrum band for wireless ...
openaire +2 more sources
Trials on Wide-band UHF Receiving Antenna
The Journal of the Institute of Television Engineers of Japan, 1966 わが国におけるUHF受信用空中線としては, 従来662Mcから770Mcまでの周波数範囲で開発設計がなされているが, UHFテレビ放送の周波数としては, 最近470Mcから770Mcまでが検討されている.本報告は広帯域UHF空中線の代表的な特性基準 (案) を低域と高域の周波数帯に分けて想定し, これに適したUHF帯にて使用される放射素子の帯域特性を述べ, さらにこの放射素子を使用して試作した二, 三の空中線について, その諸特性を記したものである.
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A portable L-band voice transceiver for satellite communication [PDF]
A portable L-band voice transceiver was developed as a feasibility model and can provide a half-duplex voice link to another terminal via the L-band transponder on the Applications Technology Satellite, ATS-6.
Maruschak, J., Nace, D.
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Who’s Afraid of a Pan-European Spectrum Policy? The EU and the Battles Over the UHF Broadcast Band
International Journal of Communication, 2018 Several European Union (EU) member states have consistently opposed European Commission (EC) efforts to create a supranational EU spectrum policy, but only Finland voted against the EC at the World Radiocommunication Conference in 2015, proposing the ...
Marko Ala-Fossi, Montse Bonet
doaj
A Broadband Ultra High Frequency (UHF) Fat-Dipole Antenna for Digital TV Applications
Applied SciencesA broadband and compact planar UHF antenna is presented for use in MIMO Digital TV indoor applications. The choice of the element and its physical implementation is oriented towards a low-profile, low-cost, and single-layer deployment.
Marcelo B. Perotoni +2 more
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RF characteristics of the hoop column antenna for the land mobile satellite system mission [PDF]
A communication system using a satellite with a 118 meter diameter quad aperture antenna to provide telephone service to mobile users remotely located from the large metropolitan areas where the telephone companies are presently implementing their ...
Foldes, P.
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