Small size phase shifter on compact structures

Abstract

This article is devoted to the description of a miniature phase shifter of the reflective type. Its dimensions were reduced with the help of compact structures – they were replaced by structures, both quarter-wave segments and plug-in plumes allowing changing the phase at the output. Phase shifters are used in phased array antennas to change the phase on the emitters and thus change the amplitude-phase distribution, which leads to a change in the radiation pattern. For a large number of emitters, a large number of phase shifters are required, which is why at low frequencies they can occupy a sufficiently large area. For this reason, it is possible to use compact structures that have identical characteristics with transmission lines in a certain frequency band. Such replacement allows saving the occupied area of the power supply circuit of the antenna array (material saving), but at the same time reduces the permissible power. The design of a phase shifter with a Central frequency of 2 GHz, whose area was reduced by 63% in relation to the typical implementation of the design, was investigated.