×

EVALUATION OF A CHARGE IMPEDANCE AT THE OUTPUT OF A DIRECTIONAL COUPLER

  • US 20110199100A1
  • Filed: 12/03/2010
  • Published: 08/18/2011
  • Est. Priority Date: 12/18/2009
  • Status: Active Grant
First Claim
Patent Images

1. A circuit for evaluating a charge impedance at the output of a directional coupler (4) having a first line (41) adapted to convey a wanted signal between a first terminal (42) and a second terminal (44) adapted to be connected to an antenna (2), and having a second line (43) coupled to the first one comprising a third terminal (46) on the side of the first terminal and a fourth terminal (48) on the side of the second terminal, the circuit (5) comprising:

  • a first input terminal (57) adapted to be connected to said third terminal of the coupler;

    a second input terminal (59) adapted to be connected to the fourth terminal of the coupler;

    a homodyne detector (60) having a first input for a signal to be processed connected to said second input terminal and having a second local oscillator input connected to said first input terminal;

    a first low-pass filter (66) having an input connected to a first output of the homodyne detector and providing first data (S66) relative to the charge impedance; and

    a second low-pass filter (67) having an input connected to a second output of the homodyne detector and providing second data (S67) relative to the charge impedance.

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