Direction finder and locator
First Claim
Patent Images
1. A direction finder and locater utilizing a synchronous detector comprising a remote unit and a target unit wherein:
- (a) the remote unit comprises;
(1) a housing;
(2) a power source;
(3) a remote unit radio signal transmitter;
(4) a directional antenna and a second antenna located approximately three feet from the directional antenna;
(5) an operator controllable activation device that when activated causes the remote unit radio signal transmitter to transmit a first radio signal with a wavelength of approximately 13 inches;
(6) a remote unit radio signal receiver tuned to receive a second radio signal transmitted from the target unit, the second radio signal having an amplitude;
(7) an electronic amplitude measurement circuit to measure the amplitude of the second radio signal; and
,(8) a visible display comprising a plurality of indicator lights that shows the operator an indication of the amplitude of the second radio signal wherein;
i. the said indication changes as the remote unit points toward or away from the target unit; and
,ii. the said indication changes as the remote unit moves closer or further away from the target unit; and
(b) the target unit comprises;
(1) a housing;
(2) a connection to a power source;
(3) two antennas;
(4) a target unit radio signal receiver tuned to receive the first radio signal from the remote unit; and
(5) a target unit radio signal transmitter that continuously transmits the second radio signal in response to the first radio signal.
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Abstract
A direction finder is disclosed that is a hand-held device used to locate a vehicle in a parking lot using a two way radio link, operating in an unlicensed freely available band of the radio spectrum. Made for outdoor use, it is independent of GPS systems, cellular telephone systems, Loran, and any other system with a large infrastructure.
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Citations
10 Claims
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1. A direction finder and locater utilizing a synchronous detector comprising a remote unit and a target unit wherein:
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(a) the remote unit comprises; (1) a housing; (2) a power source; (3) a remote unit radio signal transmitter; (4) a directional antenna and a second antenna located approximately three feet from the directional antenna; (5) an operator controllable activation device that when activated causes the remote unit radio signal transmitter to transmit a first radio signal with a wavelength of approximately 13 inches; (6) a remote unit radio signal receiver tuned to receive a second radio signal transmitted from the target unit, the second radio signal having an amplitude; (7) an electronic amplitude measurement circuit to measure the amplitude of the second radio signal; and
,(8) a visible display comprising a plurality of indicator lights that shows the operator an indication of the amplitude of the second radio signal wherein; i. the said indication changes as the remote unit points toward or away from the target unit; and
,ii. the said indication changes as the remote unit moves closer or further away from the target unit; and (b) the target unit comprises; (1) a housing; (2) a connection to a power source; (3) two antennas; (4) a target unit radio signal receiver tuned to receive the first radio signal from the remote unit; and (5) a target unit radio signal transmitter that continuously transmits the second radio signal in response to the first radio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A direction finder and locator utilizing a synchronous detector comprising a remote unit and a target unit wherein:
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(a) the remote unit comprises; (1) housing means; (2) a means for providing power to the remote unit; (3) a means for transmitting a first radio signal with a wavelength of approximately 13 inches; (4) an operator controllable activation means that, when activated, causes the transmitting means to transmit the first radio signal; (5) a means to receive a second radio signal transmitted from the target unit, the second radio signal having an amplitude; (6) a means to measure the amplitude of the second radio signal; and (7) a display means to visually display an indication of the amplitude of the second radio signal wherein; i. the indication changes when the remote unit points in a direction toward or away from the target unit; and ii. the indication changes as the remote unit moves closer or further away from the target unit; and (8) a first and second antenna means, wherein the second antenna is located approximately three feet from the first antenna; and (b) the target unit comprises; (1) housing means; (2) a means for connecting the target unit to a power source; (3) a means for receiving the first radio signal; (4) a means for continuously transmitting the second radio signal; and (5) a first and second antenna means. - View Dependent Claims (10)
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Specification