Proceedings ArticleDOI
Experimental Model of Array-fed Imaging Reflector Antenna for 21GHz-band Satellite Broadcasting System
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TLDR
In this article, an experimental model of an array-fed imaging reflector antenna for the 21GHz-band broadcasting satellite system was designed and manufactured for the Super Hi-Vision in Japan with more than 4000 scanning lines.Abstract:
Satellite broadcasting in the 21GHz-band is expected to transmit large-capacity signals such as ultra high definition TV, called Super Hi-Vision in Japan with more than 4000 scanning lines. However, the 21GHz-band suffers from severe fading due to rain. In order to overcome the large rain attenuation, a reconfigurable antenna with an array-fed reflector is effective for the 21GHz-band satellite system. Therefore, we designed and manufactured an experimental model of an array-fed imaging reflector antenna for the 21GHz-band broadcasting satellite system. We verified the characteristics by measurement. We describe the configuration of the manufactured antenna and the radiation pattern of the imaging reflector calculated by using the measured radiation pattern of the feed array. A 7dB boosted beam has been successfully obtained.read more
Citations
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Proceedings Article
Designing an engineering model of reconfigurable antenna for 21-GHz band broadcasting satellite
TL;DR: In this paper, an array-fed reflector antenna is proposed to realize wide band and high power transponder combining outputs of each element closely connected high power amplifiers, which is also reconfigurable to exploit the limited resources.
Proceedings ArticleDOI
Configuration of array-fed imaging reflector antenna for 21-GHz band broadcasting satellite
TL;DR: In this paper, an array-fed reflector antenna is proposed as part of a wide band and high power transponder combining outputs of the each element through high power amplifiers that are close to the elements.
Proceedings ArticleDOI
Prototype of 32-element horn antenna array for imaging reflector antenna of 21-GHz band broadcasting satellite
Abstract: A 21-GHz band satellite broadcasting system is being studied as a means of delivering 8K (Super Hi-Vision), 3DTV, and other advanced forms of broadcasting. We assumed the use of two 300-MHz class wideband channels in the 21.4 to 22.0-GHz band and devised an array-fed imaging reflector antenna (array-fed IRA) to supply enough power for a transponder with such a wide band. The array-fed IRA is an effective means of exploiting limited resources because of its ability to control radiation patterns; the 21-GHz band suffers from severe fading due to rain. To confirm the feasibility of the array-fed IRA system, we designed an engineering model of an array-fed IRA for a 21-GHz band broadcasting satellite. The engineering model has a feed array that consists of 32 horn antennas. To improve the accuracy of the antenna's arrangement, we combined the 32 horn antennas into one unit. To evaluate the characteristics of this unit type feed array, we fabricated and tested a 32-element horn antenna array.
Proceedings ArticleDOI
Designing an array-fed imaging reflector antenna engineering model for 21-GHz band satellite broadcasting system
TL;DR: In this article, an array-fed imaging reflector antenna (array-fed IRA) was proposed to supply enough power for a transponder with such a wide band, which is also an effective means of exploiting limited resources due to its ability to control radiation patterns.
Proceedings Article
Horn antenna array for imaging reflector antenna engineering model in 21-GHz band
TL;DR: In this paper, an array-fed imaging reflector antenna (array-fed IRA) was proposed to supply enough power for a transponder with such a wide band for a 21.4 to 22.0 GHz satellite broadcasting system.
References
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Journal ArticleDOI
A Method to Transform Rainfall Rate to Rain Attenuation and Its Application to 21 GHz Band Satellite Broadcasting
TL;DR: A method to transform rainfall rate into rain attenuation in the 21GHz band is developed and applied to the analysis of the service available for an example phased array antenna configuration, which confirmed the service availability increased with the locally increased beam technique.
Proceedings ArticleDOI
21 GHz band Direct Broadcasting Satellite System
TL;DR: In this paper, a mitigation technique using onboard array-fed reflector antennas that can boost the radiation power only in the areas with heavy rainfall, while maintaining a constant level of radiation power in the rest of the service area is described.