研究目的
To design and implement center frequency and bandwidth switchable substrate integrated waveguide filters using PIN diodes for reconfigurable communication systems.
研究成果
The study successfully designed and implemented SIW filters with switchable center frequency and bandwidth using PIN diodes. The measured results align well with simulations, demonstrating the potential of these filters in reconfigurable communication systems.
研究不足
The introduction of slots causes extra radiation loss, albeit small and acceptable. The tuning range and bandwidth variation are limited by the design and materials used.
1：Experimental Design and Method Selection:
The study employs PIN diodes to switch the resonant frequencies and coupling coefficients in substrate integrated waveguide (SIW) filters. The design includes slots on the surface of the resonators for frequency and bandwidth tuning.
2：Sample Selection and Data Sources:
The filters are designed using F4B substrates with specific dielectric properties. The resonant frequencies and coupling coefficients are measured and simulated.
3：List of Experimental Equipment and Materials:
PIN diodes (MA4P789-1141T), F4B substrates, inductors, capacitors for bias circuits.
4：Experimental Procedures and Operational Workflow:
The filters are designed with slots and PIN diodes to switch between different states. The performance is measured and compared with simulations.
5：Data Analysis Methods:
The insertion loss, return loss, center frequency, and bandwidth are analyzed to evaluate the filter performance.
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