Patent ID: 6091311
Filing Date: 2000-07-18
Classification: H01P

Abstract:
A phase shifter comprised of:a first open-ended stripline element for receiving an input electromagnetic signal of a predetermined wavelength and coupling said input electromagnetic signal to a first slotline bit element of a plurality of slotline bit elements;said input electromagnetic signal being coupled to the plurality of slotline bit elements by a series of stripline-slotline transitions to produce an output electromagnetic signal having a predetermined phase shift;a plurality of digitally controlled electronic switches to shift the phase of the electromagnetic signal by selecting a respective length through each slotline bit element of the plurality of slotline bit elements, each slotline bit element having a selectable short path length or a selectable long path length to selectively vary a total path through which the input electromagnetic signal propagates; anda second open-ended stripline element coupled to a last slotline bit element, of the plurality of slotline bit elements, coupling the output electromagnetic signal to an output device.