Abstract: The design and fabrication of a kind of E-plane stub-loaded phase shifter is present. A three-stub E-plane short circuit waveguide is applied in the main path to realize an F-band 45°fixed phase shifter. In order to facilitate test and future application, an F-band E-plane branch waveguide 90°hybrid power divider is fulfilled, one branch of which is used as a reference path and the other branch of which is loaded with a 45°phase shifter as shifter′s main path. After a comparative test, the result indicates that the phase shifter′s measured insertion loss is lower than 0. 4 dB, and the phase error is within 45°±2° between 100 GHz and 110 GHz.