Results 161 to 170 of about 4,057 (212)
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Cross slot multifrequency patch antennas
Microwave and Optical Technology Letters, 2011AbstractTwo simple single layer single feed cross slot patch antennas with air dielectric (εr = 1) substrate providing multiple frequency operation is proposed.At first a cross slot rectangular patch antenna providing quad frequency operation is proposed and experimentally studied.
L. Lolit Kumar Singh +4 more
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A novel multifrequency hybrid antenna
Microwave and Optical Technology Letters, 2013ABSTRACTA hybrid multifrequency antenna is designed by using a cubic dielectric resonator antenna and coplanar wave guide (CPW) loop radiator. The dielectric resonator antenna (DRA) is also excited by the same CPW. The DRA in conjunction with the CPW loop generates multiple frequencies which may be controlled by optimizing the dimension of the DRA and ...
Sriparna Bhattacharya (Mitra) +1 more
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Stacked dielectric resonator antenna for multifrequency operation
Microwave and Optical Technology Letters, 1998A stacked dielectric resonator antenna (DRA), composed of an annular ring excited by a coaxial probe and two cylindrical dielectric resonators (CDRs), is studied experimentally for three‐frequency band operation. A maximum frequency ratio of 1.75 is achieved between higher and lower frequencies, and quite similar radiation patterns are obtained at two ...
Sangiovanni, A. +2 more
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Multifrequency Spaceborne Deployable Radiometer Antenna Designs
IEEE Aerospace and Electronic Systems Magazine, 2020As part of overall ocean dynamic satellite research, the atmospheric correction microwave radiometer (ACMR) used to correct atmospheric path delay in the radar altimeter has been developed recently. The ACMR, composed of an observing antenna (OA) and calibration antenna, operates at 18.7, 23.8, and 37 GHz for improving atmospheric retrieval accuracy ...
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Multifrequency loop slot antenna with omnidirectional pattern
Electronics and Communications in Japan (Part I: Communications), 2006AbstractIn this paper, we study multifrequency antennas with planar omnidirectionality for application to mobile base stations. A method for frequency sharing is implemented by connecting the antenna elements resonating at their respective frequencies by microstrip lines so that they become an open terminal at the resonance frequencies of the other ...
Yuji Yokoo, Hiroyuki Arai
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Experimental results of a multifrequency array antenna
IEEE Transactions on Antennas and Propagation, 1972An array antenna containing three arrays of interlaced radiating elements with operating frequencies in L, S , and C bands are described. Measured results include radiation patterns, crosspolarization data, gain, impedance, and mutual coupling measurements.
J. Boyns, J. Provencher
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U‐patch antenna loaded by complex substrates for multifrequency operation
Microwave and Optical Technology Letters, 2001AbstractIn this paper, the analysis of patch antennas with U‐shaped metalization loaded by bianisotropic media is developed. A theoretical study is performed to obtain transmission‐line equations for bianisotropic materials, and then a method‐of‐lines (MoL) procedure is applied to obtain the radiative characteristics.
BILOTTI, FILIBERTO, Vegni L, Alu A.
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Researching horn antenna properties in multifrequency measurements
Proceedings, 6th International Conference on Actual Problems of Electronic Instrument Engineering, 2003The report summarises the results of researching properties of horn antennas included in a multifrequency microwave reflectometer within frequency range 8-26 GHz and gives the estimation of their fitness as a probe. For a microwave reflectometer, the key is fact of using the antenna at the same time for irradiation of tested structure and reception of ...
O.O. Drobakhin, Y.V. Kondratyev
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Multifrequency microstrip patch antenna using multiple stacked elements
IEEE Microwave and Wireless Components Letters, 2003A multifrequency microstrip patch antenna comprised of a driven patch and a plurality of parasitic elements placed underneath a driven patch is proposed. The antenna features a multifrequency behavior (five operating band) with similar gain.
J. Anguera +4 more
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Multifrequency dipole antenna with closed‐spaced parasitic elements
Electronics and Communications in Japan (Part I: Communications), 1989AbstractIt is shown theoretically and experimentally that a multifrequency dipole antenna can be realized by placing parasitic elements close to an excited element. Numerical data for two‐frequency and five‐frequency operations are presented. In the theoretical analysis, current distribution along both the excited and parasitic elements are calculated,
Yoshio Ebine, Kenichi Kagoshima
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