Topic
Cassegrain antenna
About: Cassegrain antenna is a research topic. Over the lifetime, 3207 publications have been published within this topic receiving 28278 citations.
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26 Mar 2012
TL;DR: In this article, a new method to design a cosecant squared radiation pattern in a shaped reflector antenna is proposed, which is expanded by modified Jacobi polynomials.
Abstract: A new method to design a cosecant squared radiation pattern in a shaped reflector antenna is proposed. Surface of the proposed reflector antenna is expanded by modified Jacobi polynomials. The expansion coefficients are optimized by using particle swarm optimization (PSO) algorithm to achieve desired cosecant squared radiation pattern in elevation plane and a narrow pencil beam radiation pattern in azimuth plane. The antenna is analyzed by physical optics (PO) method.
7 citations
Patent•
28 Oct 1996
TL;DR: In this paper, an end-fire array antenna achieves improved performance with an array of radiative members that are arranged collinearly between an array first end and an array second end and a divergent reflector which is arranged collincearly with the radiative member.
Abstract: An end-fire array antenna achieves improved performance with an array of radiative members that are arranged collinearly between an array first end and an array second end and a divergent reflector which is arranged collinearly with the radiative members. The radiative members are spaced to facilitate radiation and reception of electromagnetic signals in an antenna direction which extends from the array second end and the divergent reflector is spaced from the array first end to enhance this radiation and reception. A wall of the reflector preferably diverges from an antenna axis by an angle in the region of 24 to 48 degrees. The divergent reflector terminates in an open end which has a transverse width that preferably exceeds 1.4 λ dsgn wherein λ dsgn is the design wavelength of the antenna. In-service antennas are modified with a divergent reflector that is configured for coupling to an existing antenna back wall or antenna cup.
7 citations
Patent•
25 Jul 1977
TL;DR: In this article, the authors proposed to reduce the size of the electronic scanning array antenna as a first radiator within the beam scanning angle range by securing a difference between the central cross-section curve and the crossing curve of a reflector.
Abstract: PURPOSE:To reduce the size of the electronic scanning array antenna as a first radiator within the beam scanning angle range by securing a difference between the central cross-section curve and the crossing curve of a reflector.
7 citations
01 Jan 1982
TL;DR: The symmetrical prime-focus-fed paraboloid is the most commonly used reflector for medium and high gain, pencil-beam applications as mentioned in this paper, and is relatively straightforward to analyse, design and fabricate.
Abstract: The symmetrical, prime-focus-fed paraboloid is the most commonly used reflector for medium and high-gain, pencil-beam applications. This reflector is relatively straightforward to analyse, design and fabricate. An extensive literature exists to describe its properties.
7 citations
Patent•
02 Mar 1966
TL;DR: In this paper, a high-resolution antenna provided by numerous antenna elements disposed uniformly over the convex side of a first hemispherical reflector which is subtended by a larger second reflector is described.
Abstract: A high-resolution antenna provided by numerous antenna elements disposed uniformly over the convex side of a first hemispherical reflector which is subtended by a larger second reflector. The antenna elements are connected through equal length paths to corresponding antenna elements on the concave side of a third hemispherical reflector of a radius equal to that of the first reflector. An input is selectably connected to one of the antenna elements on the first reflector which determines the beam direction from the third reflector. Phase error produced by spherical aberration may be compensated for by means of a planar array.
7 citations