High-frequency signal amplifier
AssigneeMitsubishi Electric Corporation
InventorShinsuke WATANABE
Life of this patent
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Abstract
A high-frequency signal amplifier includes an amplifier having an input terminal and an output terminal, and amplifying a high-frequency signal; a signal line connected between the output terminal of the amplifier and an antenna; coupled lines arranged in parallel and coupled to the signal line and having different line lengths or differently terminated ends; and phase shifters shifting phase of high-frequency signals applied via the signal line and the coupled lines, supplying the high-frequency signals to the input terminal of the amplifier, and having different amounts of phase change.
Claims6
A high-frequency signal amplifier comprising:
- an amplifier having an input terminal and an output terminal, and amplifying a high-frequency signal;
- a signal line connected between the output terminal of the amplifier and an antenna;
- a plurality of coupled lines, wherein each coupled line is coupled to the signal line, is arranged parallel to the signal line, and has one of (i) a different line length and (ii) a different end termination from the other coupled lines;
- and
- a plurality of phase shifters shifting phase of high-frequency signals applied via the signal line and the plurality of coupled lines and supplying the high-frequency signals to the input terminal of the amplifier, and having different amounts of phase change.
A high-frequency signal amplifier comprising:
- an amplifier having an output terminal, and amplifying a high-frequency signal;
- a signal line connected between the output terminal of the amplifier and an antenna;
- a plurality of coupled lines, wherein each coupled line is coupled to the signal line, is arranged parallel to the signal line, and has one of (i) a different line length and (ii) a different end termination from the other coupled lines;
- a plurality of wave detectors outputting DC signals when high-frequency signals are applied via the signal line and the plurality of coupled lines;
- a plurality of matching circuits having different impedance transforming amounts;
- and
- a plurality of switches, wherein each switch is connected between the output terminal of the amplifier and a respective one of the plurality of matching circuits, and is turned ON or OFF depending on the DC signals from the plurality of wave detectors.
Dependencies are inferred from the claim text.