Antenna receiver in which carrier-to-noise ratio of demodulation signal is improved
First Claim
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1. An antenna receiver comprising:
- a plurality of mixers that frequency-converts signals received by a plurality of antennas into intermediate-frequency signals;
a plurality of local oscillators, which correspond to the plurality of mixers and which supply local oscillation signals having the same frequency to the mixers;
a plurality of PLL circuits, which correspond to the plurality of local oscillators and which set the frequency of the local oscillation signals; and
an adder that adds the intermediate-frequency signals output from the mixers, wherein phases of reference signals supplied to the PLL circuits are independently changeable from each other.
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Abstract
An antenna receiver includes a plurality of mixers for frequency-converting signals received by a plurality of antennas into intermediate-frequency signals; a plurality of local oscillators, which correspond to the plurality of mixers and which supply local oscillation signals having the same frequency to the mixers; a plurality of PLL circuits, which correspond to the plurality of local oscillators and which set the frequency of the local oscillation signals; and an adder for adding the intermediate-frequency signals output from the mixers. The phases of reference signals supplied to the PLL circuits can be changed independently from each other.
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Citations
3 Claims
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1. An antenna receiver comprising:
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a plurality of mixers that frequency-converts signals received by a plurality of antennas into intermediate-frequency signals;
a plurality of local oscillators, which correspond to the plurality of mixers and which supply local oscillation signals having the same frequency to the mixers;
a plurality of PLL circuits, which correspond to the plurality of local oscillators and which set the frequency of the local oscillation signals; and
an adder that adds the intermediate-frequency signals output from the mixers, wherein phases of reference signals supplied to the PLL circuits are independently changeable from each other. - View Dependent Claims (2, 3)
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Specification