A Digital Latching Ferrite Strip Transmission Line Phase Shifter

This paper is concerned with the development of a new non-reciprocal, digital phase shifter which combines the rapid switching speeds offered by latching devices and the compactness of a strip transmission line structure. A four-bit. C-band model is described which offers a maximum of 3 percent phase deviation across an 8 percent frequency band with a corresponding figure of merit (degrees of phase shift/db loss) in excess of 500. In addition, the new phase shifter is much smaller than its waveguide counterpart, and is better suited for integration into a compact matrix which may contain many identical phase shifters.