scispace - formally typeset
Search or ask a question
Topic

Cassegrain antenna

About: Cassegrain antenna is a research topic. Over the lifetime, 3207 publications have been published within this topic receiving 28278 citations.


Papers
More filters
Patent
23 Jun 1953

11 citations

Proceedings ArticleDOI
02 Jul 2015
TL;DR: Hybrid-reflector multibeam antennas employed in satellite navigation systems transform adopted accelerated spatial filtering algorithms to select an amplitude-phase distribution from a set of precalculated distributions for various interference signaling environments in the beam where the interference signal affects the radiation pattern of the main lobe.
Abstract: Hybrid-reflector multibeam antennas employed in satellite navigation systems transform adopted accelerated spatial filtering algorithms. In order to accelerate the algorithm, the adaptive system selects an amplitude-phase distribution from a set of precalculated distributions for various interference signaling environments in the beam where the interference signal affects the radiation pattern of the main lobe. Specification of the weighted coefficients is performed after the most appropriate amplitude-phase distribution has been selected. Data from the weighted coefficients calculations is used for null formation in radiation patterns of beams where interference affects the side lobes.

11 citations

Patent
09 Mar 1976
TL;DR: In this article, an antenna is made operative for two frequency bands, ΔFB and ΔFH, the latter higher than the former, by means of a frequency selective absorber, covering, in its edge region, a reflector of the antenna in order to reduce the diameter of the reflecting surface of the reflector.
Abstract: An antenna is made operative for two frequency bands, ΔFB and ΔFH, the latter higher than the former, by means of a frequency selective absorber, covering, in its edge region, a reflector of the antenna in order to reduce the diameter of the reflecting surface of the reflector and therefore the gain of the antenna for frequency band ΔFH.

11 citations

15 Apr 1991
TL;DR: In this article, the authors describe the design process and test results of a dual beam array antenna model, which consists of 24 slotted waveguides and a Blass matrix feed network.
Abstract: The authors describe the design process and test results of a dual beam array antenna model. The objective of this ESA funded program is to study the realization of dual beams in a waveguide slotted array of the ERS-1 SAR type (10 m*1 m). The experimental model is 1 m*1 m and comprises 24 slotted waveguides and a Blass matrix feed network. The synthesis and design of the array and Blass matrix is described. Calculated and measured results of the experimental model are presented. The key component in the Blass matrix is a crossguide coupler. The authors present a novel design of a crossguide coupler which makes it possible to realize very tight coupling. >

11 citations

Patent
21 Dec 2001
TL;DR: An antenna system consisting of parabolic rectangular reflectors disposed contiguously in a linear array was proposed in this paper, where the reflectors formed a larger common rectangular aperture without gaps in illumination.
Abstract: An antenna system consisting of parabolic rectangular reflectors disposed contiguously in a linear array. The use of parabolic rectangular reflectors permits the reflectors to form a larger common rectangular aperture without gaps in illumination. The contiguous array of parabolic rectangular reflectors permits a lower profile which is ideal for use on an aircraft. Each parabolic rectangular reflector has its own feed system and each of the feeds are excited in phase. The combined radiation patterns of the parabolic reflectors produces a beam with a narrow width. This narrow beamwidth permits the system to communicate with one source while filtering out signals coming from other sources. In one embodiment, the antenna system may be mechanically steered in order to communicate with a transmitter and/or receiver whose relative position is continuously varying with respect to the antenna system.

11 citations


Network Information
Related Topics (5)
Antenna (radio)
208K papers, 1.8M citations
95% related
Dipole antenna
38K papers, 513.8K citations
94% related
Antenna measurement
39.6K papers, 494.4K citations
94% related
Microstrip antenna
43.9K papers, 604.4K citations
92% related
Bandwidth (signal processing)
48.5K papers, 600.7K citations
79% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202318
202267
202111
202018
201920
201824