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Offset feed antennas

  • US 9,733,353 B1
  • Filed: 01/16/2015
  • Issued: 08/15/2017
  • Est. Priority Date: 01/16/2014
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a transceiver configured to generate a radar signal;

    a radar configured to transmit the radar signal, the radar comprising a first offset spiral feed (OSF) antenna that includes substantially spiral shaped feed arms with a central point of the feed arms being offset from a center axis of the first OSF antenna that is substantially orthogonal to a plane of the first OSF antenna;

    a receive antenna configured to sense a return signal in response to a transmission of the radar signal, the receive antenna being a second OSF antenna that includes substantially spiral shaped feed arms with a central point of the feed arms being offset from a center axis of the second OSF antenna that is substantially orthogonal to a plane of the second OSF antenna; and

    a processor configured to detect an object based on the return signal,wherein the first and the second OSF antennas are arranged such that the central point of the feed arms of the first OSF antenna is offset from the center axis of first OSF antenna in a direction away from the second OSF antenna.

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