Unit-Cell Loaded With PIN Diodes for 1-Bit Linearly Polarized Reconfigurable Transmitarrays

• Published in: IEEE antennas and wireless propagation letters Vol. 18; no. 1; pp. 98 - 102
• Main Authors: Nguyen, Binh Duong, Pichot, Christian
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.01.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Electromagnetism; Engineering Sciences; Flat lens antenna; Frequency selective surfaces; Linear polarization; Multilayers; P-i-n diodes; Phased arrays; PIN diodes; Propagation losses; reconfigurable transmitarray antenna; Reconfiguration; Substrates; Superhigh frequencies; Switches; transmitarray antenna; Transmitting antennas; Unit cell; Varactors; frequency selective surfaces; Switches; multilayer frequency selective surfaces; ring slot; Phased arrays; full-wave electromagnetic simulation; linearly polarized reconfigurable transmitarrays; antenna radiation patterns; reconfigurable transmitarray antenna; Propagation losses; microwave antenna arrays; C-patch; unit-cell loaded; Varactors; electromagnetic wave polarisation; word length 1 bit; frequency 11.5 GHz; phase quantization; waveguide simulator; Substrates; reconfigurable unit-cell; rectangular gap; flat lens antenna; Transmitarray antenna; slot antenna arrays; P-i-n diodes
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2018.2881555

In this letter, a reconfigurable unit-cell for transmitarray antenna working at X-band is presented. It is designed to provide 1-bit phase quantization using p-i-n diodes. The unit-cell is based on multilayer frequency selective surfaces with the use of 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. The experimental results show that the unit-cell provides two values of the transmission phase with a step of 180° at 11.5 GHz. Furthermore, the unit-cell has a low thickness of 0.19λ 0 , and is low-cost and easy to fabricate.