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Optical Antenna Gain 2: Receiving Antennas
Applied Optics, 1974Expressions are derived for the gain of a centrally obscured, circular optical antenna when used as the collecting and focusing optics in a laser receiver which include losses due to (1) blockage of the incoming light by the central obscuration, (2) the spillover of energy at the detector, and (3) the effect of local oscillator distribution in the case
J J, Degnan, B J, Klein
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Optical Antenna Gain 1: Transmitting Antennas
Applied Optics, 1974The gain of centrally obscured optical transmitting antennas is analyzed in detail. The calculations, resulting in near- and far-field antenna gain patterns, assume a circular antenna illuminated by a laser operating in the TEM(00) mode. A simple polynomial equation is derived for matching the incident source distribution to a general antenna ...
B J, Klein, J J, Degnan
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IEEE Transactions on Antennas and Propagation, 2019
A high-isolation eight-antenna multi-input multi-output (MIMO) array operating in the 3.5 GHz band (3.4–3.6 GHz) for future smartphones is proposed. Here, a novel balanced open-slot antenna is designed as an array antenna element, in which this antenna ...
Yixin Li, C. Sim, Yong Luo, Guangli Yang
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A high-isolation eight-antenna multi-input multi-output (MIMO) array operating in the 3.5 GHz band (3.4–3.6 GHz) for future smartphones is proposed. Here, a novel balanced open-slot antenna is designed as an array antenna element, in which this antenna ...
Yixin Li, C. Sim, Yong Luo, Guangli Yang
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Nano Letters, 2012
We experimentally demonstrate the directional emission of polarized light from single semiconductor nanowires. The directionality of this emission has been directly determined with Fourier microphotoluminescence measurements of vertically oriented InP nanowires.
Grzela, G. +5 more
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We experimentally demonstrate the directional emission of polarized light from single semiconductor nanowires. The directionality of this emission has been directly determined with Fourier microphotoluminescence measurements of vertically oriented InP nanowires.
Grzela, G. +5 more
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Size Reduction of Self-Isolated MIMO Antenna System for 5G Mobile Phone Applications
IEEE Antennas and Wireless Propagation Letters, 2019An antenna element that has not only the self-isolated property but also a compact size is proposed for the fifth-generation multiple-input and multiple-output (MIMO) system in mobile phone applications.
A. Zhao, Zhouyou Ren
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IEEE Transactions on Antennas and Propagation, 2019
The operating frequency of future communication systems will cover unlicensed millimeter-wave bands as well as existing microwave bands. Large frequency ratio antennas that can be applied to both frequency bands simultaneously and maintain the high ...
Jin Fan Zhang, Y. Cheng, Y. Ding, C. Bai
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The operating frequency of future communication systems will cover unlicensed millimeter-wave bands as well as existing microwave bands. Large frequency ratio antennas that can be applied to both frequency bands simultaneously and maintain the high ...
Jin Fan Zhang, Y. Cheng, Y. Ding, C. Bai
semanticscholar +1 more source
MIMO Antenna With Compact Decoupled Antenna Pairs for 5G Mobile Terminals
IEEE Antennas and Wireless Propagation Letters, 2019In this letter, a compact self-decoupled antenna structure is proposed for the fifth-generation multiple-input--multiple-output (MIMO) operation in mobile terminals.
Zhouyou Ren, A. Zhao, Shengjie Wu
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Spiral antennas and antenna arrays
2005 IEEE Antennas and Propagation Society International Symposium, 2005The planar square-Archimedean spiral located at the center of a dipole has been demonstrated as a valuable passive antenna element in the upper MM-wave and THz regions between about 100 GHz and 2 THz (Bjarnason, E. et al., Appl. Phys. Lett., vol.85, p.3983, 2004).
R.M. Bilotta, E.B. Brown
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2021
The capability of controlling the spatial broadening of the radiation moving away from the relevant sources is considered a very attractive feature for a plethora of applications, such as imaging, diagnostic, and wireless power transfer. An important class of ideal solutions of the scalar wave equation that remain confined and do not undergo ...
Comite, Davide +4 more
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The capability of controlling the spatial broadening of the radiation moving away from the relevant sources is considered a very attractive feature for a plethora of applications, such as imaging, diagnostic, and wireless power transfer. An important class of ideal solutions of the scalar wave equation that remain confined and do not undergo ...
Comite, Davide +4 more
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Large antennas and microwave antennas
2005Large antennas and microwave antennas, which form the subject of the remaining chapters of this book, are characterized by the property that their useful dimensions are very large compared with the wavelength involved. The word ‘large’ refers to the physical dimensions of the antenna (radio telescopes, for example) compared with which the wavelengths ...
S. Drabowitch +4 more
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