CONTINUOUSLY TUNABLE PHASE SHIFTER

摘要

A phase shifter comprises a coarse phase tuning arrangement and a fine phase tuningarrangement. The coarse phase tuning arrangement provides a discrete number of phase shifts. The fine phase tuning arrangement includes a RLC network, having a resistor, an inductor and a capacitor. The fine phase tuning arrangement also comprisesan optical arrangement for varying the resistance value of the resistor. This phase shifter is able to obtain broadband, continuous 360o phase shifting also a Gigahertzfrequencies. It also allows close to linear phase shift versus frequency resulting in truetime delay capability, very low insertion loss and high value of maximum phase adjust.