Results 221 to 230 of about 395,229 (288)
Some of the next articles are maybe not open access.
Feeding networks for sinuous antennas
Microwave and Optical Technology Letters, 1999Reference LEMA-ARTICLE-1999-002doi:10.1002/(SICI)1098-2760(19990205)20:3 3.0.CO;2-C Record created on 2006-11-30, modified on 2016-08 ...
Gonnet, P. +3 more
openaire +2 more sources
2017
Terahertz antennas present a different set of challenges to the antenna designer typically striving for very high performance while at the very limit of the chosen fabrication process. Many of the same design techniques used at lower frequencies are still applied, but fabrication constraints impose significant limitations on the type of structure that ...
Chattopadhyay, G. +5 more
openaire +3 more sources
Terahertz antennas present a different set of challenges to the antenna designer typically striving for very high performance while at the very limit of the chosen fabrication process. Many of the same design techniques used at lower frequencies are still applied, but fabrication constraints impose significant limitations on the type of structure that ...
Chattopadhyay, G. +5 more
openaire +3 more sources
Feed optimization in multi-feed antennas
WESCON/57 Conference Record, 1957The problem of attaining close beam spacing and high crossover levels in multi-beam antennas is discussed with attention directed toward the mutual effects of the several feeds. A series of measured curves is used to present the mutual coupling effects on the primary feed patterns.
openaire +1 more source
1982
In a quasi-optical antenna system, it makes little difference, so far as the illumination characteristics of the feed are concerned, whether the collimating device is reflective (i.e. single or multiple mirrors) or refractive (i.e. a lens). In either case it is the function of the feed to provide a radiation pattern which is largely confined to the ...
A. W. Love, A. W. Rudge, A. D. Olver
openaire +1 more source
In a quasi-optical antenna system, it makes little difference, so far as the illumination characteristics of the feed are concerned, whether the collimating device is reflective (i.e. single or multiple mirrors) or refractive (i.e. a lens). In either case it is the function of the feed to provide a radiation pattern which is largely confined to the ...
A. W. Love, A. W. Rudge, A. D. Olver
openaire +1 more source
Direct feed biconical antenna as a reference antenna
2011 IEEE International RF & Microwave Conference, 2011Antenna factor is the main parameter in EMC measurement. Therefore, accurate and low uncertainty antenna is important in order to gain a reliable antenna factor. Direct feed biconical antenna has low uncertainty because balun can be eliminated in the design. Furthermore, the biconical antenna has fix phase center.
Syarfa Zahirah Sapuan +2 more
openaire +1 more source
1989
In the present discussion covering the most important types, those aspects which are of particular practical interest to the designer will be covered, emphasising available options and including references to the latest advances in feed design. For the sake of descriptive economy and consistency, it will be assumed, unless otherwise stated, that the ...
openaire +1 more source
In the present discussion covering the most important types, those aspects which are of particular practical interest to the designer will be covered, emphasising available options and including references to the latest advances in feed design. For the sake of descriptive economy and consistency, it will be assumed, unless otherwise stated, that the ...
openaire +1 more source
1966
Abstract : This study of the transverse focal region of a spherical reflector includes theoretical analyses centered on geometric optics, on vector polarization and on diffraction integrals of physical optics and their evaluation by the method of stationary phase. The results of the numerical evaluation of the focal region field for an incoming wave of
openaire +1 more source
Abstract : This study of the transverse focal region of a spherical reflector includes theoretical analyses centered on geometric optics, on vector polarization and on diffraction integrals of physical optics and their evaluation by the method of stationary phase. The results of the numerical evaluation of the focal region field for an incoming wave of
openaire +1 more source
Dual-Polarized Antenna Feed Matrix Design for Multibeam Lens Antenna
IEEE Antennas and Wireless Propagation Letters, 2023Soumitra Biswas
exaly
Design of a Wideband Dual-Feed Circularly Polarized Antenna for Different Axial Ratio Requirements
IEEE Antennas and Wireless Propagation Letters, 2021Sanz Izquierdo Benito, Luo Qi, Lehu Wen
exaly