Patent ID: 6784836
Filing Date: 2004-08-31
Classification: H01Q

Abstract:
An electronic circuit for forming an antenna pattern, the circuit comprising:a first signal generator for generating a first signal of a first frequency and of a first phase angle, said first signal generator having a first control loop; a second signal generator for generating a second signal of a second frequency and of a second phase angle, the second frequency being substantially equal to the first frequency, said second signal generator having a second control loop; a control circuit coupled to said first and second signal generators for controlling a phase difference between the first phase angle and the second phase angle, the control circuit having an input for receiving a control signal for determining the phase difference, at least one of said first and second control loops having an additional input for receiving a control current from said control circuit proportional to said control signal; a first analog mixer for mixing a first antenna signal and the first signal and a second analog mixer for mixing a second antenna signal and the second signal and a combiner for adding respective output signals of the first and the second mixers.