Patent ID: 6266011
Filing Date: 2001-07-24
Classification: H01Q

Abstract:
A phased array antenna system, comprising:an array of antenna elements,an array of frequency mixers corresponding to said antenna elements, anda fixed phase delay network connected to provide a scan control signal to said mixers with respective phase delays that correspond to delay line lengths between said antenna elements,said mixers connected in circuit with their respective antenna elements so that the scan angle of said antenna system is controlled by the frequency of said scan control signal independent of the frequency of an operating signal for said antenna elements,said phase delay network comprising a first time delay network between said antenna elements through which said scan control signal is propagated in a transmission mode in one direction, and a second time delay network between said antenna elements through which a mixing complement of said scan control signal is propagated in the opposite direction, said mixers connected to respective tap locations on said first and second time delay networks that correspond to said antenna elements, said mixers mixing said scan control signal and its mixing complement together to yield said operating signal as mixing outputs to said antenna elements.