研究目的
To present a reconfigurable unit-cell for transmitarray antenna working at X-band, designed to provide 1-bit phase quantization using p-i-n diodes.
研究成果
A transmitarray unit-cell with 1-bit phase resolution has been presented, based on the use of p-i-n diodes to control phase shift. The prototype exhibits a low profile of 0.18λ0 and is easy to fabricate, with good experimental results obtained.
研究不足
The use of p-i-n diodes does not allow continuous phase adjustment. The unit-cell is designed for linear polarization and operates at X-band.
1：Experimental Design and Method Selection:
The unit-cell is designed based on multi-layer frequency selective surfaces with two substrates and a combination of a C-patch and a ring slot loaded by a rectangular gap. It is optimized using full-wave electromagnetic simulation and verified by using waveguide simulator.
2：Sample Selection and Data Sources:
The unit-cell is fabricated and measured to validate the design. The transmission coefficient is measured using a waveguide simulator.
3：List of Experimental Equipment and Materials:
AlGaAs MA4AGBLP912 p-i-n diodes, Roger 5870 substrates, capacitors, inductors, and a WR-90 waveguide simulator.
4：Experimental Procedures and Operational Workflow:
The unit-cell is inserted into waveguides to measure the transmission phase and magnitude. The diodes are biased for ON and OFF states to control the transmission phase.
5：Data Analysis Methods:
The transmission coefficient (S21) is measured to determine the transmission phase and magnitude.
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