Patent ID: 6989788

Claim:
A scanned antenna array, comprising: at least one time delay stage, each said time delay stage having at least one time delay sub-circuit, each said time delay sub-circuit including a sub-circuit input and a sub-circuit output, each said time delay sub-circuit comprising: a first delay line having a first and second end; a second delay line having a first and second end; a respective first diode switch connected to said corresponding sub-circuit input, said respective first diode switch connecting said first end of a selected one of said first and second delay lines to said sub-circuit input; and a respective second diode switch connected to said corresponding sub-circuit output, said second diode switch connecting said second end of said selected one of said first and second delay lines to said sub-circuit output, said sub-circuit output connected to one of another of said time delay sub-circuits or alternatively to an output of said time delay stage; a respective transmit/receive (TR) module coupled to an output of each said time delay stage through an M-Way divider associated with said respective transmit/receive (TR) module, each said TR module issuing the respective TR module output signal; and a plurality of antenna elements coupled to an output of a corresponding one of said TR modules and radiating a respective TR module output signal received therefrom; wherein each said first and second diode switch includes a respective common arm and at least one respective shunt arm, said common arms of at least one of said first and second diode switches being negatively biased relative to ground potential.