Patent ID: 8629807
Filing Date: 2014-01-14
Classification: G01S,H01Q

Abstract:
1. A phased array antenna system comprising: a plurality of antenna elements arranged in a pattern and configured to receive radio-frequency signals; a plurality of down-converters each connected to one of the antenna elements to receive the radio-frequency signal captured by the antenna element, each down converter operative to down-convert the received radio-frequency signal using a local oscillator signal having a selected phase; a signal combining network configured to combine the down-converted signals generated by the down-converters to produce an output signal; a rotary oscillator array configured to provide local oscillator signals each with a selected phase to each of the down-converters based on control information; and a control unit configured to provide the control information to the rotary oscillator array to obtain the phase-shifted local oscillator signals, wherein the rotary oscillator array comprises a plurality of rotary travelling wave oscillators, a rotary travelling wave oscillator comprising: