A RADIO FREQUENCY REFLECTION TYPE PHASE SHIFTER, AND METHOD OF PHASE SHIFTING

摘要

A Radio Frequency reflection type phase shifter is provided comprising a coupler for input and output, and Nvariable capacitors , where N is an integer value of 2 or more, each of the variable capacitors providing radio frequency reflection, each of the variable capacitors being connected to the coupler by at least one impedance transformer, the characteristic impedances of the impedance transformers having been selected so that the phase shifter provides a phase shift at least substantially proportional to the value of N, wherein each of the variable capacitors comprises electrochromic material.