The present disclosure relates to a phase shifter (PS) designed to be endless and hitless, i.e., able to continuously phase shift without discontinuities over an infinite range. A fast PS unwraps the phase of a slower PS which has reached the limit of its range. After this unwrapping is done, the fast PS may quickly reset and return to its neutral state. With repeated resets, the slow PS effectively has endless and hitless operation over infinite range. This approach enable operation without temperature stabilization, e.g., use of a thermoelectric cooler (TEC).

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This work is licensed under a Creative Commons Attribution 4.0 License.