JPH0453331U

JPH0453331U -

Info

Publication number: JPH0453331U
Application number: JP9569590U
Authority: JP
Priority date: 1990-09-12
Filing date: 1990-09-12
Publication date: 1992-05-07

Description

[Brief explanation of drawings]

第１図は、この考案の一実施例による衛星搭載
用マルチビームアンテナ装置を示す図、第２図は
この考案の動作説明図、第３図は従来のマルチビ
ームアンテナ装置を示す図、第４図は、第１〜第
ｎのビームの信号レベルを示す図、第５図は従来
装置において利得を制御した場合の第１〜第ｎの
ビームの信号レベルの状態を示す図である。図中、１ａ〜１ｎは第１〜第ｎのビーム信号入
力端子、２ａ〜２ｎは第１〜第ｎビーム用周波数
変換器、３はチヤネルプロセツサ、４は周波数変
換器、５は電力増幅器、６はアンテナ、７は制御
回路、８は電力増幅器出力レベル信号、９は電力
増幅器の利得制御信号、１０は出力レベルテレメ
トリ端子、１１は出力レベルコマンド信号入力端
子、１２ａ〜１２ｎは第１〜第ｎのビーム出力レ
ベル制御信号、１３ａ〜１３ｎは第１〜第ｎのビ
ーム出力モニタ信号、１４ａ〜１４ｎは第１〜第
ｎのビームの信号レベルである。なお図中、同一
符号は、同一又は相当部分を示す。 FIG. 1 is a diagram showing a satellite-mounted multi-beam antenna device according to an embodiment of this invention, FIG. 2 is an explanatory diagram of the operation of this invention, FIG. 3 is a diagram showing a conventional multi-beam antenna device, and FIG. This figure shows the signal levels of the first to nth beams, and FIG. 5 is a diagram showing the state of the signal levels of the first to nth beams when the gain is controlled in a conventional device. In the figure, 1a to 1n are first to nth beam signal input terminals, 2a to 2n are frequency converters for the first to nth beams, 3 is a channel processor, 4 is a frequency converter, 5 is a power amplifier, 6 is an antenna, 7 is a control circuit, 8 is a power amplifier output level signal, 9 is a power amplifier gain control signal, 10 is an output level telemetry terminal, 11 is an output level command signal input terminal, 12a to 12n are first to first n beam output level control signals, 13a to 13n are first to nth beam output monitor signals, and 14a to 14n are signal levels of the first to nth beams. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

first to nth beam signal input terminals; first to nth frequency converters for frequency converting each input signal inputted from the input terminals into IF signals for channel separation; and a channel processor connected to the converter for separating and combining each output signal into required channels to form a single signal for transmission to the ground; and an output signal of the channel processor; a frequency converter for converting to a frequency for terrestrial transmission; a power amplifier for amplifying the output signal of the frequency converter to a required power; and an antenna for radiating the output signal of the power amplifier to the ground; a power amplifier output level signal for monitoring the output level of the power amplifier; first to nth beam output monitor signals for monitoring the output levels of the first to nth frequency converters; and first to nth frequency converters; receiving first to nth beam output level control signals for controlling the output level of the converter, the first to nth beam output monitor signals, and a power amplifier output level signal, so as to prevent the power amplifier from being saturated; a control circuit for outputting the first to nth beam output level control signals to control the output levels of the first to nth frequency converters; and transmitting the power amplifier output level signals to the ground. A multi-beam antenna device for use on a satellite, characterized in that it is equipped with an output level telemetry terminal.