×

Phase calibration method and apparatus

  • US 7,106,249 B2
  • Filed: 08/18/2004
  • Issued: 09/12/2006
  • Est. Priority Date: 03/30/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A phase calibration method of a phased array antenna for inserting a calibration signal into a transmit signal, inputting the resultant signal to a prescribed circuit and calibrating phase of the transmit signal using the calibration signal, which is contained in an output signal from said circuit, comprising the steps of:

  • extracting the calibration signal by subtracting the transmit signal from the output signal of said circuit;

    estimating the phase characteristic of said circuit based upon a change in phase of the calibration signal; and

    subjecting the transmit signal to a phase adjustment having a characteristic that is opposite the phase characteristic.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×