A Low-RCS Multifunctional Shared Aperture With Wideband Reconfigurable Reflectarray Antenna and Tunable Scattering Characteristic

This article presents a low radar cross section (RCS) single-layer multifunctional shared aperture (MSA) with tunable manipulation of radiation and bistatic scattering patterns over the same wide frequency band. A low-cost positive-intrinsic-negative (p-i-n) diode is used in the unit cell to evoke t...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2023-01, Vol.71 (1), p.621-630
Main Authors: Li, Pan, Yu, Hang, Su, Jianxun, Song, Liwei, Guo, Qingxin, Li, Zengrui
Format: Article
Language:English
Subjects:
Antenna arrays
Apertures
Bandwidths
Beam steering
Broadband
Capacitance
Frequencies
Incident waves
Interdigital capacitance (IC)
low radar cross section (RCS)
optimized multielement phase cancellation (OMEPC) method
P-i-n diodes
Phased arrays
Radar antennas
Radar cross sections
Radiation
Resonant frequency
Scattering
single-layer multifunctional shared aperture (MSA)
Unit cell
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Summary:This article presents a low radar cross section (RCS) single-layer multifunctional shared aperture (MSA) with tunable manipulation of radiation and bistatic scattering patterns over the same wide frequency band. A low-cost positive-intrinsic-negative (p-i-n) diode is used in the unit cell to evoke the 180^{\circ } \pm 20^{\circ } reflection phase difference for x -polarized incident waves; thus, the wideband beam steering and tunable bistatic scattering patterns can be generated. By integrating the interdigital capacitance (IC) into the unit cell, the reflection bandwidth limitation for y -polarized waves at a higher frequency band is broken. Furthermore, the optimized multielement phase cancellation (OMEPC) method is adopted to maximize the RCS reduction (RCSR) bandwidth of y -polarization. A 16 × 16-element MSA prototype is fabricated and measured. The experimental results show that the 3 dB gain bandwidth of the MSA is from 5.5 to 9.5 GHz with the fractional bandwidth (FBW) of 53.3%, and the common frequency band of 10 dB RCSR for x - and y -polarized waves is in the range of 4.5-9.6 GHz (FBW = 72.3%). The low RCS MSA with tunable control of radiation and scattering patterns over a wide frequency band can be used in military radar and low detectable systems.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2022.3225588