Beacon-on-demand radar transponder
First Claim
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6-1. The radar transponder of claim 1, further including a GPS unit, the code words provided by the code generator encoding locational information from the GPS unit.
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Abstract
A radar transponder is provided that synchronizes the encoding of repeated radar pulses using an envelope detector to detect the envelope of received radar pulse signals. An edge detector detects the pulse edges in the envelope so that code words may be multiplied with the received radar pulse signals synchronously with the detected pulse edges to provide an encoded pulse train that may be transmitted to a radar interrogator.
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Citations
18 Claims
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6-1. The radar transponder of claim 1, further including a GPS unit, the code words provided by the code generator encoding locational information from the GPS unit.
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8. A method of encoding, comprising:
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receiving a train of radar pulses;
envelope detecting the received train of radar pulses to provide an envelope pulse signal;
edge detecting the envelope pulse signal;
generating code words substantially synchronously to the edges detected in the envelope pulse signal; and
multiplying the generated code words with the received train of radar pulses to provide an encoded pulse train. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An integrated antenna, comprising:
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a substrate having a first surface and an opposing second surface;
heavily-doped contact regions extending from the first surface to the second surface;
a metallic layer on the second surface;
an insulating layer on the metallic layer;
antenna elements formed on the insulating layer; and
electrical conductors formed in vias in the insulating layer, the electrical conductors coupling the antenna elements through the contact regions to driving circuitry formed on the first surface of the substrate, the separation between the driving circuitry and the antenna elements thereby aiding electrical isolation of the driving circuitry. - View Dependent Claims (15, 16, 17, 18)
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Specification