Low-loss reflective X-band phase shifter with wide phase control range

Nowadays, one of the important tasks driven by the actual society needs is the development of effective technical solutions in the field of reflective surfaces and antenna arrays for modern microwave wireless networks. They are necessary to enhance network coverage and communication stability on the way of the operating frequency increase. Their use is beneficial in highly directive wide-band radio channels vulnerable to blockage and micromobility effects. In this work, we propose a low-loss reflective X-band phase shifter with wide phase control range which can be effectively used as a part of field-programmable reflectarray for radio signal routing. Our study focuses on the influence of the errors in geometrical parameters arising during the fabrication process on the radiophysical properties of the phase shifter based on a log-periodic antenna integrated with diode. For such a design, we demonstrate geometry-defined reflection losses of less than 1 dB, and the corresponding phase control range approaching 330° with a tolerable absolute geometry deviation of up to 90 μm.