Circularly polarizing radar transponder and lifesaving apparatus
First Claim
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1. A circularly polarizing radar transponder, comprising:
- a circularly polarizing antenna unit for receiving any of a circularly polarized radio wave, a vertically polarized radio wave and a horizontally polarized radio wave therein;
a receiver unit connected to said circularly polarizing antenna unit and detecting any of said circularly polarized, vertically polarized, and horizontally polarized radio waves, and producing a trigger signal in response to said detection;
a transmitter unit for receiving said trigger signal from said receiver unit and generating a plurality of pulses upon reception of said trigger signal; and
a battery for supplying power to said receiver unit and said transmitter unit.
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Abstract
Described herein is a circularly polarizing radar transponder. The circularly polarizing radar transponder comprises a helical type circularly polarizing antenna unit for receiving all of a circularly polarized wave, a vertically polarized wave and a horizontally polarized wave therein, a receiver unit connected to the helical type circularly polarizing antenna unit, a transmitter unit for generating a plurality of pulses with a radio wave received by the receiver unit as a trigger, and a battery unit for supplying power to these receiver and transmitter units.
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Citations
16 Claims
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1. A circularly polarizing radar transponder, comprising:
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a circularly polarizing antenna unit for receiving any of a circularly polarized radio wave, a vertically polarized radio wave and a horizontally polarized radio wave therein;
a receiver unit connected to said circularly polarizing antenna unit and detecting any of said circularly polarized, vertically polarized, and horizontally polarized radio waves, and producing a trigger signal in response to said detection;
a transmitter unit for receiving said trigger signal from said receiver unit and generating a plurality of pulses upon reception of said trigger signal; and
a battery for supplying power to said receiver unit and said transmitter unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15)
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8. A lifesaving apparatus provided with a radar transponder, said radar transponder comprising:
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a circularly polarizing antenna unit for receiving any of a circularly polarized radio wave, a vertically polarized radio wave and a horizontally polarized radio wave therein;
a receiver unit connected to said circularly polarizing antenna unit and detecting any of said circularly polarized, vertically polarized, and horizontally polarized radio waves, and producing a trigger signal in response to said detection;
a transmitter unit for receiving said trigger signal from said receiver unit and generating a plurality of pulses upon reception of said trigger signal; and
a battery for supplying power to said receiver unit and said transmitter unit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 16)
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Specification
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Current AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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Original AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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InventorsTakase, Kazuyoshi, Nishimura, Kenji
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Primary Examiner(s)Sotomayor, John B.
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Application NumberUS09/452,374Time in Patent Office888 DaysField of Search342/42, 342/44, 342/51, 342/175, 342/188US Class Current342/51CPC Class CodesG01S 13/767 Responders; Transponders te...G01S 7/024 using polarisation effects ...G01S 7/026 involving the transmission ...H01Q 1/22 by structural association w...H01Q 1/2225 used in active tags, i.e. p...H01Q 1/362 for broadside radiating hel...H01Q 11/08 Helical antennasH01Q 13/04 Biconical horns biconical d...H01Q 15/24 Polarising devices; Polaris...H01Q 9/27 Spiral antennas
