Patent ID: 8427387

Claim:
A broadband spiral transmission line phase shifting power divider device having a plurality of transmission lines, comprising: an input for receiving a signal; a power splitter, coupled to said input, for splitting the signal received at the input into a first output and a second output; a directional coupler, for receiving the first output signal, and for providing a directional coupler output, said directional coupler having a coupler port; a balun for receiving the directional coupler output from the coupler port of the directional coupler and for providing a balun output; an open quadrifilar spiral, for receiving the balun output from the balun and for reflecting power; a second directional coupler for receiving the second output, said second directional coupler having a second coupler port; a delay for receiving a second directional coupler output from the second directional coupler; a second balun for receiving a delay output from the delay; a modified, open quadrifilar spiral, for receiving a second balun output from the second balun and for reflecting power; and wherein a difference in reflected power between the reflected power from the open quadrifilar spiral and the delayed reflected power from the modified, open quadrifilar spiral provides an approximately constant phase shift over a broad range of frequencies.