26,406 Hits in 1.6 sec

New Reflector Shaping Methods for Dual-Reflector Antenna

K. Quzwain, Y. Yamada, K. Kamardin, N. H. Abd Rahman, A. Ismail
2022 Radioengineering  
In the previous authors' work, in order to increase the antenna gain at on-focus beams, a reflector shaping method was applied to the dual-reflector antenna, and constant phase and adequate amplitude distribution  ...  The idea of modifying the reflector shaping method comes from the equivalent parabola concept in the Cassegrain dual reflector antenna.  ...  Previous well known antenna design method was the reflector shaping technique that was developed to achieve high gain at the on-focus feed of the dual-reflector antenna [6] .  ... 
doaj:62aafb22bbe04c24a36f3434363417ab fatcat:btpk3kr6p5ahnoiwjofcjxyapy

Compressive Reflector Antenna Phased Array [chapter]

Ali Molaei, Juan Heredia Juesas, Jose Angel Martinez Lorenzo
2017 Antenna Arrays and Beam-formation  
This chapter describes a new phased array system, which is based on the use of a novel compressive reflector antenna (CRA), that is capable of providing high sensing capacity in different imaging applications  ...  Conventional phased array imaging systems seek to reconstruct a target in the imaging domain by employing many transmitting and receiving antenna elements.  ...  Table 1 . 1 Comparison of the parameters of reflector antennas.  ... 
doi:10.5772/67663 fatcat:zwbthdhihfcghbxkkxaioroxry

High-Performance Parabolic Antenna Reflectors

J. S. Archer
1980 Journal of Spacecraft and Rockets  
The reflector arrangements on Intelsat V and TDRSS are so dominant that the antenna configuration is referred to as the ‘‘antenna farm.’’  ...  To function properly as an antenna reflector, the parabola must be properly positioned with respect to the antenna axis and the antenna feed phase center, as shown in Fig. 4, for the more general case  ... 
doi:10.2514/3.57702 fatcat:3shknldbejd7tjcivpjmthurbi

Numerical Modeling of Reflector Antennas [chapter]

Oleg Yurtcev, Yuri Bobkov
2011 Numerical Simulations - Applications, Examples and Theory  
Mathematical model of reflector antenna in radiation and receiving modes Antenna geometry The single-reflector and double-reflector Casserrain antenna (reflector is parabolic, subreflector is hyperbolic  ...  Fig. 12 . 12 Antenna diagramsScanning in a single-reflector antenna. Multi-beam reflector antenna. Fig. 13 . 13 The antenna diagrams during scanning.  ... 
doi:10.5772/13075 fatcat:gkowfqrumneafbloh445gmz6ne

Design of Planar Reflector Antennas

Z. Raida, S. Gona
2002 Radioengineering  
A design of single and folded reflector antennas is presented. Wefocus in the use of an optimization during the design process.  ...  Further more, anoriginal procedure of phase center extraction of antennas and scattersis described.  ...  Simple Reflector Antenna Usually, a hyperbolic sub-reflector is used if a simple reflector antenna is being designed.  ... 
doaj:5a626e62a77a4c02aec734b846802a0a fatcat:yiqmxgjcprbxbm4q2il5mvaoze


Omid Zandi, Zahra Atlasbaf, Keyvan Forooraghi
2007 Electromagnetic Waves  
In this paper, a flat multilayer dielectric reflector antenna has been designed and analyzed. The reflector is made of several sandwiched dielectric layers.  ...  The significance of the reflector is ability to radiate high power and at the same time having small dimensions.  ...  NON-METALIC FLAT REFLECTORS Ordinary reflectors are used to shape and concentrate the radiated field of many antennas.  ... 
doi:10.2528/pier07022604 fatcat:7dy2u2uhofbv5gkorn6rury5ti

Development of Feed for Parabolic Reflector Antenna

Jagdish. M. Rathod, Y. P. Kosta
2009 International Journal of Engineering and Technology  
Reflector antennas are widely used antenna in the communication world for numerous applications like radio astronomy, microwave communication, satellite tracking, and radar applications.  ...  This different frequency band performance having horn feed and it works for the parabolic reflector antenna. We have worked on frequency band between 4.8 GHz to 5.9 GHz for horn type of feed.  ...  Horn antenna is one of the most popular antennas used as a focal point feed in many reflector antennas.  ... 
doi:10.7763/ijet.2009.v1.16 fatcat:axx4g5oqh5fana5awnflfk5qgy

On the regularity of reflector antennas

Luis Caffarelli, Cristian Gutiérrez, Qingbo Huang
2008 Annals of Mathematics  
These two theorems are sufficient for the discussion of strict reflector antennas in Section 4.  ...  On the other hand, the global reflector antenna problem (i.e., Ω = Ω * = S n−1 ) was treated in [CO94] , [GW98] .  ... 
doi:10.4007/annals.2008.167.299 fatcat:gwpac7vuwjh3pkbnldecbgcsha

Reflector Antenna reCeiving a spherical wave

O. A. Yurtsev, N. M. Naumovich, M. M. Dgali
2019 Doklady BGUIR  
The paraboloidal reflector antenna is considered. The feed element is a horn.  ...  Using physical optics (PO) method the near field distribution and antenna pattern are studied when the antenna is focused to near-field and far-field region.  ...  The paraboloidal reflector antenna is considered. The feed element is a horn.  ... 
doaj:5b18e2b5257146a1a661f0853dcd7945 fatcat:karpiz6o3jfnlng32bazgmk374

Coupling Effects in Multibeam Reflector Antennas

H. Schjaer-Jacobsen, H.A. Lessow, J. Bach Andersen
1973 3rd European Microwave Conference, 1973  
Bach Andersen onceptual d.esi principles concerning mutiple bieam reflector antennas in which coupling effects are of major influence on antenna p~erformance are presented.  ...  Coupling Effects in Multibeam Reflector Antennas. In 3rd European Microwave Conference (Vol. Volume 2, pp. 1-1). IEEE. DOI: 10.1109/EUMA.1973.331800 H. Schjenr-Jaiobsen, H.A. Lessow, J..  ... 
doi:10.1109/euma.1973.331800 fatcat:cpxibenjtrbbhadr6xwahyicki

Adaptive Nulling in Hybrid Reflector Antennas

Robert A. Shore
1995 Electromagnetics  
reflector antennas.  ...  In this report we consider adaptive nulling in hybrid reflector antennas. A hybrid antenna here consists of a reflector (single or multiple) combined with a feed array.  ... 
doi:10.1080/02726349508908402 fatcat:w565ku6pq5aotd4fn77rh33fgu

Development of Conical Horn Feed For Reflector Antenna

Jagdish. M. Rathod, Y. P. Kosta
2009 International Journal of Engineering and Technology  
This different frequency band performance having horn feed, works for the parabolic reflector antenna. We have worked on frequency band between 4.8 GHz to 5.9 GHz for horn type of feed.  ...  Parabolic dish antenna is the most commonly and widely used antenna in communication field mainly in satellite and radar communication.  ...  Horn Feed For Reflector Antenna Jagdish.  ... 
doi:10.7763/ijet.2009.v1.13 fatcat:lrbk65le5bb5rbvqaosldo35uy

Near-Field Radio Holography of Large Reflector Antennas

J. Baars, R. Lucas, J. Mangum, J. Lopez-Perez
2007 IEEE Antennas & Propagation Magazine  
We summarise the mathematical foundation of the holographic method of measuring the reflector profile of an antenna or radio telescope.  ...  The results for both the VertexRSI and AEC (Alcatel-EIE-Consortium) prototype ALMA antennas are presented.  ...  This forms the basis of the so-called radio holographic measurement of the shape of a reflector antenna.  ... 
doi:10.1109/map.2007.4395293 fatcat:grqpkfnvh5ajreej57aabs7a4m

A Novel Pattern Diversity Reflector Antenna Using Reconfigurable Frequency Selective Reflectors

I-Young Tarn, Shyh-Jong Chung
2009 IEEE Transactions on Antennas and Propagation  
A radiation pattern diversity reflector antenna is investigated. Novel switchable frequency selective reflectors are designed and developed to construct a square corner reflector antenna.  ...  By controlling a switching device on the frequency selective reflector, one can make it opaque or transparent to a vertically polarized incident wave. This antenna is fed by a monopole.  ...  Configuration of the pattern reconfigurable reflector antenna.  ... 
doi:10.1109/tap.2009.2028606 fatcat:fmvxehnfvve7fciqbk5yq7s57y

Analysis of the Nonconcentric Reflector Antenna-in-radome System by the Iterative Reflector Antenna and Radome Interaction

T. Oğuzer, A. Altintas
2007 Journal Electromagnetic Waves and Applications  
Nonconcentric reflector antenna-in-radome systems are used in applications especially requiring smaller radome coverages.  ...  The presented reflector antenna-in-radome geometry can be assumed to be as a combination of the two parts. The first one is the reflector surface and its directive feed antenna.  ...  INTRODUCTION The radomes are frequently used to protect the reflector antennas from the environmental conditions.  ... 
doi:10.1163/156939307779391696 fatcat:7d2wc7drczctxmca7kgs2dj2na
« Previous Showing results 1 — 15 out of 26,406 results