R. F. testing of the third generation defense communication satellite [PDF]
The approach taken to test a completed DSCS communications satellite on a system level is described. Areas to be described are measuring RF isolation of separate communications subsystems and a test method which insures that one RF subsystem does not ...
Massaro, M., Sargent, J.
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Propagation effects for land mobile satellite systems: Overview of experimental and modeling results [PDF]
Models developed and experiments performed to characterize the propagation environment associated with land mobile communication using satellites are discussed.
Goldhirsh, Julius, Vogel, Wolfhard J.
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Wide-Band UHF Television Receiving Antennas
The Journal of the Institute of Television Engineers of Japan, 1969 これまでUHFテレビ受信用アンテナ (662-770MHz) として広く用いられている八木アンテナ, コーナレフレクタアンテナなどをさらに広帯域化 (470-770MHz) するために, その要となるまったく新しい放射器を開発した. この放射器は構造が簡単で, 理論的にもすぐれたインピーダンスを示しているが, さらに, この放射器を支持する絶縁材料の影響を有効に利用することにより, より広帯域なインピーダンスを示すように工夫した実用的な放射器である. この理論解析と実験結果を述べ, これを用いたUHFテレビ受信用広帯域アンテナの諸特性についても述べる.
Atsushi Oyama +2 more
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Analysis of Silver Ink Bow-Tie RFID Tag Antennas Printed on Paper Substrates
International Journal of Antennas and Propagation, 2007 In this study, polymeric silver inks, paper substrates, and screen printing were used to produce prototype Bow-Tie tags. Because of increasing interest in applying passive UHF-RFID systems in paper industry, the Bow-Tie antenna used in this study was ...
Sari Merilampi +4 more
doaj +1 more source
Propagation effects by roadside trees measured at UHF and L-band for mobile satellite systems [PDF]
Propagation field tests were performed in Central Maryland and involved a helicopter and mobile van as the source and receiving platforms, respectively. Tests were implemented at both UHF (870 MHz) and L-band (1.5 GHz) during a period in which the trees ...
Goldhirsh, Julius, Vogel, Wolfhard J.
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Dual-Band Dual-LP/CP Antennas Using Combined Metasurface and Patch For UHF/2.45-GHz RFID Readers
IEEE AccessThis paper proposes dual-band dual linearly-polarized (LP)/circularly-polarized (CP) antennas using combined metasurface and patch for ultra high frequency (UHF) and 2.45-GHz RF identification (RFID) readers.
Thi Ngoc Hien Doan +2 more
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A description of results from the handbook on signal fade degradation for the land mobile satellite service [PDF]
During the period 1983 to 1988 a series of experiments were undertaken by the Electrical Engineering Research Laboratory of the University of Texas and the Applied Physics Laboratory of the Johns Hopkins University in which propagation impairment effects
Goldhirsh, Julius, Vogel, Wolfhard J.
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A Novel Planar Microstrip Antenna Design for UHF RFID [PDF]
Journal of Systemics, Cybernetics and Informatics, 2007 Passive UHF RFID tags generally do not work well near metal or water. Microstrip antennas offer a potential solution, but suffer from manufacturing complexity because a need for via or some other reference to ground. We present a new antenna and matching
Madhuri Eunni +2 more
doaj
Results of 1987 MSS helicopter propagation experiment at UHF and L band in Central Maryland [PDF]
This effort emphasizes several important results pertaining to a mobile satellite system propagation experiment performed in Central Maryland during June 1987.
Goldhirsh, Julius, Vogel, Wolfhard J.
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An overview of results derived from mobile-satellite propagation experiments [PDF]
During the period 1983-1988, a series of Land Mobile Satellite Service (LMSS) propagation experiments were performed. These experiments were implemented with transmitters on stratospheric balloons, remotely piloted aircraft, helicopters, and ...
Goldhirsh, Julius, Vogel, Wolfhard J.
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