Portable Digital Satellite News Gathering (SNG) RF Terminal Using a Flat Antenna : PAPER Special Issue on Digital Broadcasting Technology (Special Issue on Digital Broadcasting Technology)
スポンサーリンク
概要
- 論文の詳細を見る
Error-correction techniques can be used to reduce the required carrier-to-noise ratio (C/N) in digital satellite news gathering (SNG) systems. The required e. i. r. p. of a digital SNG terminal is smaller than that of conventional analog SNG RF terminals. In this paper, a Ku-band portable SNG RF terminal using a flat antenna is proposed to make the best use of these digital systems. This portable terminal uses 16 planar microstrip subarray antennas, each with a solid-state power amplifier (SSPA) mounted on its backside. The proposed RF terminal is distinctly different from a conventional RF terminal with a parabolic antenna in two ways ; it is portable and it has electronic tracking capability. Electronic antenna tracking reduces the terminal setup time because precise alignment of the antenna with the satellite is not required. This paper first describes the system concept and discusses the design concept. Secondly, it then explains phase shifters and feedback loops for electronic tracking. The tracking performance of a feedback system using four subarrays is also presented with some comparisons between theoretical and measured results. Experimental results for the low side-lobe flat antenna and the SSPAs are then presented. These are the most important components of the system. The flat antenna meets the design objectives specified by ITU-R Recommendations. By orthogonally exciting the rectangular patch antenna, the flat antenna is capable of operating dual polarizations and dual frequencies (transmit/vertical polarization : 14 GHz ; receive/horizontal polarization : 12 GHz). The SSPAs have an efficiency of 21% and an output power of 5 W.
- 社団法人電子情報通信学会の論文
- 1994-12-25
著者
-
Tanaka Saburo
Ecological Engineering Toyohashi University Of Technology
-
TANAKA Shigehisa
Central Research Laboratory, Hitachi, Ltd.
-
Tanaka Shigehisa
Central Research Laboratory Hitachi Ltd.
-
Tanaka Shoji
Ecological Engineering Toyohashi University Of Technology
-
Murata Takao
NHK Science and Technical Research Laboratories
-
Mitsumoto Hideo
NHK Science and Technical Research Laboratories
-
Fujita Masaru
NHK Science and Technical Research Laboratories
-
Tanaka Shoji
NHK Science and Technical Research Laboratories
-
Takano Kouichi
NHK Science and Technical Research Laboratories
-
Imai Kazuo
NHK Science and Technical Research Laboratories
-
Toyama Noboru
NHK Science and Technical Research Laboratories
-
Tanaka Shoji
Nhk Science & Technology Research Laboratory
-
Tanaka Shoji
Nhk Science & Technology Research Laboratories
関連論文
- A 35-GHz, 0.8-A/W and 26-µm Misalignment Tolerance Microlens-Integrated p-i-n Photodiodes
- Highly Reliable Operation of InGaAlAs Waveguide Photodiodes for Optical Access Network Systems
- High Responsivity, Low Dark Current, and Highly Reliable Operation of InGaAIAs Waveguide Photodiodes for Optical Hybrid Integration (Special Issue On Devices, Packaging Technology, and Subsystems for the Optical Access Network)
- Lymph-Node Detection System Using a High T_c SQUID and Ultra-Small Particles(Special Issue on Superconductive Electronics)
- Properties of High T_c Superconducting Quantum Interference Device Microscope With High μ-Metal Needle : Superconductors
- Properties of High T_c Superconducting Quantum Interference Device Microscope with High μ-Metal Needle
- Windowless High-T_c Superconducting Quantum Interference Device Microscope
- Onboard Antennas and Simulation of Service Availability for 21-GHz Band Broadcasting Satellite
- A Method to Transform Rainfall Rate to Rain Attenuation and Its Application to 21GHz Band Satellite Broadcasting
- Portable Digital Satellite News Gathering (SNG) RF Terminal Using a Flat Antenna : PAPER Special Issue on Digital Broadcasting Technology (Special Issue on Digital Broadcasting Technology)
- Onboard Antennas and Simulation of Service Availability for 21-GHz Band Broadcasting Satellite
- A 35-GHz, 0.8-A/W and 26-μm Misalignment Tolerance Microlens-Integrated p-i-n Photodiodes
- Radiation Pattern of Array-fed Imaging Reflector Antenna for 21 GHz-band Satellite Broadcasting System(2012 Korea-Japan Antennas and Propagation Workshop)
- Radiation Pattern of Array-fed Imaging Reflector Antenna for 21GHz-band Satellite Broadcasting System