CPC H03H 17/08 (2013.01) [H01P 3/08 (2013.01); H03H 11/16 (2013.01)] | 20 Claims |
1. A digital phase shifter, comprising:
an input port configured to receive signals;
an output port configured to transmit phase shifted signals; and
a plurality of transmission lines disposed between the input port and the output port, wherein:
the transmission lines disposed in a ring with a first pair of the transmission lines disposed in series in a first path and a second pair of the transmission lines disposed in series in a second path, and
a selected one of the transmission lines of the first and second pairs comprising a quarter-wave hybrid coupled line.
|