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Feed horn

About: Feed horn is a research topic. Over the lifetime, 2395 publications have been published within this topic receiving 26548 citations. The topic is also known as: feedhorn.


Papers
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01 Apr 1987
TL;DR: In this paper, the authors present an overview of the current multi-beam and contoured-beam antenna technology and the limitations of the offset reflector with respect to beam scanning and cross polarization.
Abstract: : High-gain spacecraft antennas with multiple beams and contoured beams are key components in satellite communications and direct broadcast systems. This is reflected on the latest generation of communications satellites, where the antenna subsystem is the largest subsystem with its weight of more than 300 kg. The antennas achieve a large communications capacity through multiple frequency re-uses and may be reconfigured to serve different coverage areas. The paper overviews the current multi-beam and contoured-beam antenna technology. Different implementations, reflector or lens with feed array or direct radiating array, are considered. The emphasis is placed upon systems with offset paraboloidial reflectors. The limitations of the offset reflector with respect to beam scanning and cross polarization are reviewed. computer-aided design procedures and design examples are presented.

6 citations

Proceedings ArticleDOI
01 Sep 2006
TL;DR: In this article, the authors proposed a wall configuration consisting of two spline-profiled tapers and a few coaxial cavities for obtaining a multimode horn with both a compact structure and wideband characteristics.
Abstract: This paper proposes a novel wall configuration, which consists of two spline-profiled tapers and a few coaxial cavities, for obtaining a multimode horn with both a compact structure and wideband characteristics. Such a mixed profile including the coaxial cavities is optimized over the specified frequency range. A compact circular-aperture horn with two coaxial cavities which has good VSWR characteristics and low cross-polarization component over about 30% bandwidth is presented and its performance is discussed numerically and experimentally.

6 citations

Patent
22 Feb 2002
TL;DR: The quad ridged horn antenna of as discussed by the authors equalizes these beamwidths through of a conductive ring around the mouth of the horn antenna, which is used for exciting a reflector or an array of reflectors in two closely spaced bands, such as the Ku band.
Abstract: Quad ridged horn antennas which may be individually disposed at the focal point of a parabolic reflector, or in an antenna array of parabolic reflectors. In the field of satellite communications, focus-fed parabolic reflectors are required to be compact yet provide broadband signal services. As such, the antenna horn feed structure must be very compact and provide equally broadband services. In order to provide uniform excitation of a parabolic reflector antenna, the antenna must have equal beamwidths in the E plane and the H plane. The quad ridged horn antenna of the invention equalizes these beamwidths through of a conductive ring around the mouth of the horn antenna. Matching the E plane and the H plane beam widths results in uniform excitation of a parabolic reflector. The conductive ring is advantageously effective for exciting a reflector or an array of reflectors in two closely spaced bands, such as the Ku band.

6 citations

Patent
Ken Takei1
22 Feb 2013
TL;DR: In this paper, a radio communication system includes a radio transmitter which performs up-sampling on an information signal, and performs modulation on a carrier wave using the sampled information signal to transmit the modulated carrier wave, and a radio receiver which receives transmission waves transmitted from the radio transmitter, and demodulates the information signal.
Abstract: The radio communication system includes a radio transmitter which performs up-sampling on an information signal, and performs modulation on a carrier wave using the sampled information signal to transmit the modulated carrier wave, and a radio receiver which receives transmission waves transmitted from the radio transmitter, and demodulates the information signal. The radio transmitter includes a transmission processing unit that generates the transmission waves, and a transmission unit that rotates polarized waves of the transmission waves with a predetermined rotation frequency, and wirelessly transmits the transmission waves, and the transmission processing unit copies the sampled information signal, multiplies the copied information signals by predetermined weighting factors, and generates the transmission waves by assigning the information signals on a time axis such that the copied information signals are respectively transmitted with different polarization angles.

6 citations

Journal ArticleDOI
TL;DR: In this article, a self-deployable parabolic cylindrical reflector for an L-band synthetic aperture radar is presented, which consists of four curved surfaces formed from thin sheets of composite materials connected by hinges along the edges, and the reflective surface is provided by the front surface.
Abstract: A bidirectional deployable parabolic cylindrical reflector for an L-band synthetic aperture radar is presented in this study, in which a self-deployed antenna with low weight was designed. The antenna consists of four curved surfaces formed from thin sheets of composite materials connected by hinges along the edges, and the reflective surface is provided by the front surface. The edge profiles of connecting lines were obtained through geometric analysis. A scaled model, including design and manufacture, was demonstrated to validate the process from the folded state to the fully deployed state. The non-contact synchronous vision measuring method was used to test the basic frequency of the scaled model, and the test results gave the verification of the analyses. Compared with the existing unidirectional deployable antenna, this new type of bidirectional deployable antenna can be applied to larger-size antennas and has better performance because the glass-woven tape connections were substituted with more reliable hinges. Static, modal, harmonic response, and transient response analyses of the full-sized reflector structure were modeled with the commercial finite element (FE) package ABAQUS. The modeling techniques were developed to predict the structural dynamic behavior of the reflector and the results showed that the first natural frequency was 0.865 Hz, and the reflector structure had good stiffness in three directions. This proposed structure has very high stiffness-to-mass ratio because of its hollow solid construction. A preliminary simulation of radiation properties of the parabolic cylindrical antenna, fed by an off-set linear feed horn array, was conducted to obtain the radiation pattern of the feed and the reflector.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202254
202123
202024
201934
201841