Research Of Microwave Digital Phase Shifter

Phase shifter is widely applied in the system of communication and radar. Especially for Phased Array radar, Microwave phase shifter is an important component and used in many parts of Phased Array radar. Phase Array Radar can scan beams fast by controlling the phase of radiator elements in the antenna aperture surface, which shows many excellences such as agility, change celerity and multifunction. Therefore, Phase Array Radar is fit for the necessity of combat readiness. For phase shifter, more bits it has, finer beams it can control, and more complex it and its control circuit are. Since we have many high requests for phase shifter, we must attach importance to the research of it.This paper researches basic principle of microwave digital phase shifter deeply, reviews different theories of all kinds of microwave digital phase shifter circuit, analyzes loaded-line phase shifter in detail and draws design curves according to formulas. And this paper presents a novel method, which makes use of modeling simulation that software-Ansoft Serenade 8.7 provides to evaluate parameter values of PIN diodes through S parameter measurement. Then, a kind of 6-bit digital phase shifter circuit is designed and simulated through software-Ansoft Serenade 8.7. Finally, an actual circuit board of the phase shifter circuit is made, and its performance is tested and analyzed. All above is very meaningful for research of microwave digital phase shifter.