4.6 Article

A Broadband 1-Bit Single-Layer Reconfigurable Reflectarray Unit Cell Based on PIN Diode Model

期刊

IEEE ACCESS
卷 11, 期 -, 页码 6477-6489

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2023.3237764

关键词

PIN photodiodes; Bandwidth; Substrates; Microstrip antennas; Broadband antennas; Broadband communication; Microstrip; Polarization; Reflectarrays; unit cell; PIN diode model; reconfigurable antenna; linear polarization; circular polarization; broadband

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In this work, a simple but novel method for modelling PIN diode SMP-1340-040 is developed by using waveguides and modified simulation approaches. Based on the obtained model, a broadband 1-bit unit cell using only one substrate is also proposed. The experimental results show an excellent agreement with the simulation, confirming the accuracy of the proposed PIN diode model.
Microstrip reconfigurable reflectarray antennas (RRAs) have great potential for advanced systems including satellite communications and the 6th generation (6G) wireless mobile communication networks. However, as a type of microstrip antennas, RRAs generally exhibit an intrinsic issue of narrow bandwidths. This issue is further deteriorated by complicated structures for phase shifting and DC supplying in RRAs. PIN diodes have been used in recent works to control the phases of RRA elements. However, modelling them is still costly and time consuming. In this work, a simple but novel method for modelling PIN diode SMP-1340-040 is developed by using waveguides and modified simulation approaches. Based on the obtained model, a broadband 1-bit unit cell using only one substrate is also proposed, and it achieves a simulated bandwidth of 40.6% and 33.8% for linear and circular polarizations, respectively. The experimental results show an excellent agreement with the simulation, which confirms the accuracy of the proposed PIN diode model. Moreover, the performances of the unit cell demonstrate that it can be used for designing RRAs in bands X and Ku.

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