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Antenna feed

About: Antenna feed is a(n) research topic. Over the lifetime, 7463 publication(s) have been published within this topic receiving 100828 citation(s). more


Open accessJournal ArticleDOI: 10.1126/SCIENCE.1111886
10 Jun 2005-Science
Abstract: We have fabricated nanometer-scale gold dipole antennas designed to be resonant at optical frequencies. On resonance, strong field enhancement in the antenna feed gap leads to white-light supercontinuum generation. The antenna length at resonance is considerably shorter than one-half the wavelength of the incident light. This is in contradiction to classical antenna theory but in qualitative accordance with computer simulations that take into account the finite metallic conductivity at optical frequencies. Because optical antennas link propagating radiation and confined/enhanced optical fields, they should find applications in optical characterization, manipulation of nanostructures, and optical information processing. more

Topics: Directional antenna (63%), Antenna (radio) (62%), Dipole antenna (61%) more

1,996 Citations

Journal ArticleDOI: 10.1109/MCOM.2004.1341263
Abstract: Multiple-antenna systems, also known as multiple-input multiple-output radio, can improve the capacity and reliability of radio communication. However, the multiple RF chains associated with multiple antennas are costly in terms of size, power, and hardware. Antenna selection is a low-cost low-complexity alternative to capture many of the advantages of MIMO systems. This article reviews classic results on selection diversity, followed by a discussion of antenna selection algorithms at the transmit and receive sides. Extensions of classical results to antenna subset selection are presented. Finally, several open problems in this area are pointed out. more

Topics: 3G MIMO (68%), Omnidirectional antenna (64%), Directional antenna (62%) more

970 Citations

Journal ArticleDOI: 10.1109/TAP.1983.1143162
P. Sharma, K. C. Gupta1Institutions (1)
Abstract: Analysis and optimized designs are presented of three types of single feed circularly polarized microstrip antennas, namely, a diagonal fed nearly square, a truncated-corners square and a square with a diagonal slot. The Green's function approach and the desegmentation methods are used. The resonant frequencies are calculated for two orthogonal modes which together yield circular polarization. Optimum feed locations are determined for the best impedance match to a 50 \Omega coaxial feed line. Axial-ratio bandwidths, voltage standing-wave ratio (VSWR) bandwidths and radiation patterns are evaluated and verified experimentally. more

Topics: Antenna feed (59%), Feed line (56%), Slot antenna (56%) more

560 Citations

Open accessBook
01 Dec 1993-
Abstract: This book delivers an in-depth examinations of the three basic field-theoretical methods used for the design aid of different waveguide components You'll find CAD algorithms, examples of their applications, and operational principles of various components used in antenna feed systems more

525 Citations

Journal ArticleDOI: 10.1109/TAP.1978.1141852
Roger F. Harrington1Institutions (1)
Abstract: The radiation characteristics of an N -port antenna system can be controlled by impedance loading the ports and feeding only one or several of the ports. Reactive loads can be used to resonate a real port current to give a radiation pattern of high directivity. The theory of resonance is extended to include complex port currents and impedance loads. The initial design of an array is obtained by resonating a desired port current vector, which is then improved by an optimum seeking univariate search method. The direction of maximum gain can be controlled by varying the load reactances. Several numerical examples are given for a circular array of seven dipole elements. more

Topics: Antenna gain (58%), Antenna (radio) (57%), Dipole antenna (56%) more

419 Citations

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Topic's top 5 most impactful authors

Kin-Lu Wong

34 papers, 1.1K citations

Jiro Hirokawa

23 papers, 156 citations

Kwai-Man Luk

19 papers, 562 citations

Mattia Pascolini

13 papers, 529 citations

Lotfollah Shafai

13 papers, 57 citations

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