研究目的
Investigating the design and performance of a tunable phase shifter in a substrate integrated waveguide (SIW) for applications in communication, measurement, and radar systems.
研究成果
A tunable SIW phase shifter with a compact design and acceptable performance metrics has been demonstrated. The design is scalable for millimeter-wave applications and may find use in steerable antenna arrays.
研究不足
The operation of the phase shifter is limited to frequencies above 5.3 GHz to avoid poor insertion and return loss near the cut-off frequency. Additional phase shift could be achieved by increasing the number of loading diodes.
1：Experimental Design and Method Selection:
The design involves a substrate integrated waveguide (SIW) with a longitudinal slot loaded with varactors to achieve tunable phase shifting.
2：Sample Selection and Data Sources:
The SIW is fabricated using Rogers 5870 material with specific dimensions and varactors (BB857 SAT-TV varicap diode) for capacitance variation.
3：List of Experimental Equipment and Materials:
Anritsu 37397C network analyzer for measurements, Rogers 5870 material, BB857 SAT-TV varicap diodes, and a dual 35 V power supply for biasing.
4：Experimental Procedures and Operational Workflow:
The phase shifter's performance is measured in terms of phase shift, insertion loss, and return loss across different bias voltages and frequencies.
5：Data Analysis Methods:
The phase constant and cut-off frequency are calculated to analyze the phase shifter's performance.
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