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A reconfigurable phase shifter in waveguide composed by glide-symmetric holey unit cells is presented in this paper. The hole depths of this kind of holey unit cell are modified to allow a phase shift variation in the waveguide. The adjustment of the hole depths in the unit cell is achieved by the insertion of screws in the holes that are implemented as through holes. This advantage in implementation of reconfigurable elements inside the holes is added to the low-dispersive behaviour of the holey glide-symmetric unit cells. Both features make possible the design of a reconfigurable phase shifter in waveguide with flat phase shift responses. The phase shifter design proposed in this work provides a maximum phase shift of 90° with good impedance matching from 50 GHz to 75 GHz.

This paper presents the applicability of using the time-gating technique to propagation measurements in order to recreate new scenarios. This technique, which has been studied previously in antenna measurements, is applied in propagation measurements to modify and tune the reflections that a particular propagation scenario exhibits. A new configuration for shielded chambers is proposed, where half of the chamber is covered with absorbers (anechoic chamber) and half without absorbers (reverberation chamber). This configuration and the time-gating technique allow the study of the propagation environment for the new recreated scenarios.