An ultra-wideband coding polarizer for beam control and RCS reduction

doi:10.1007/s11467-022-1252-4

Front. Phys.

2023, Vol. 18

Issue (4) : 42301 https://doi.org/10.1007/s11467-022-1252-4

RESEARCH ARTICLE

An ultra-wideband coding polarizer for beam control and RCS reduction

Huanhuan Gao¹, Xiaojun Huang¹(

), Xiongwei Ma¹, Xiaoyan Li², Linyan Guo³, Helin Yang⁴(

)

¹. College of Communication and Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
². College of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710129, China
³. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
⁴. College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China

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Abstract

Pancharatnam−Berry (PB) phase metasurface, as a special class of gradient metasurfaces, has been paid much attention owing to the robust performance for phase control of circularly polarized waves. Herein, we present an element-based polarizer for the first step, which enables the incident electromagnetic waves into the cross-polarized waves with the relative bandwidth of 71%, and the polarization conversion ratio exceeds 90% at 6.9−14.5 GHz. Then an eight-elements coding polarizer based on the PB phase is presented for the applications on beam control and radar cross section reduction. The simulated values indicate that the reduction of radar cross section is more than 10 dB at 6−16 GHz. Our work reveals the availability of manipulating the waves, beamforming in communication systems and electromagnetic stealth, and so on.

Keywords polarizer Pancharatnam−Berry phase coding metasurface beam control RCS reduction

Corresponding Author(s): Xiaojun Huang,Helin Yang

About author:

Changjian Wang and Zhiying Yang contributed equally to this work.

Issue Date: 20 February 2023

Cite this article:

Huanhuan Gao,Xiaojun Huang,Xiongwei Ma, et al. An ultra-wideband coding polarizer for beam control and RCS reduction[J]. Front. Phys. , 2023, 18(4): 42301.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-022-1252-4
https://academic.hep.com.cn/fop/EN/Y2023/V18/I4/42301

Fig.1 Structure diagram.

Fig.2 The working mechanism diagram of metasurface.

Fig.3 Reflectance. (a)

r x x

and

r y x

. (b)

r y y

and

r x y

. (c) PCR.

Fig.4 (a) The schematic diagram of polarizer. (b) The reflectances of

r u u

r v v

and phase difference

Δ φ

Fig.5 Surface current distribution. (a) 7.3 GHz. (b) 10.6 GHz. (c) 14.3 GHz.

$α$	$0 °$	$22.5 °$	$45 °$	$67.5 °$	$90 °$	$112.5 °$	$135 °$	$157.5 °$

Unit
1-bit	0	?	?	?	1	?	?	?
2-bit	00	?	01	?	10	?	11	?
3-bit	000	001	010	011	100	101	110	111

Tab.1 The basic unit cells for CMS.

Fig.6 (a) Amplitude and (b) phase with different rotation angles.

Fig.7 3D and 2D far field scattering patterns of 1-bit CMS. (a) 3D far field, (b) 2D far field along x-direction. (c) 3D far field, (d) 2D far field along y-direction.

Fig.8 3D and 2D far field scattering patterns of 2-bit CMS. (a) 3D far field, (b) 2D far field.

Fig.9 3D and 2D far field scattering patterns of 3-bit CMS. (a) 3D far field, (b) 2D far field of LCR incidence. (c) 3D far field, (d) 2D far field of RCP incidence.

Fig.10 The RCS of the metal plane and CMS.

	Polarization converter
Ref.	$O B 1) (G H z)$	$P C R (%)$	$R B 2) (%)$

[52]	10.3?20.5	90%	66.2
[53]	6.53?12.07	88%	59.6
[54]	9.38?13.36 & 14.84?20.36	90%	35
[55]	8?12	90%	40
This work	6.9?14.5	90%	71
	RCS reduction
Ref.	Working mechanism	$O B 1) (G H z)$	$R B 2) (%)$

[56]	Anomalous reflection	8.9?11.4	24.6
[57]	Anomalous reflection	9.85?19.37	65
[58]	Anomalous reflection	7?16	78
[59]	Destructive interference	9.5?13.9 & 15.2?20.4	32 & 30
[60]	Absorber	2.12?4.15 & 6.08?9.58	64 & 45
[61]	Diffused scattering	5.4?7.4	31.25
[62]	Diffused scattering	13.2?23.2	54.9
[63]	Polarization conversion	8?16	67.8
This work	Polarization conversion & diffused scattering	6.9?14.5	71

Tab.2 Performance comparison with presented works.

Fig.11 (a) Sample diagram for testing polarization conversion. (b) Experimental test environment. (c) Sample diagram for RCS reduction.

Fig.12 Measurement results of (a) x-polarized incident wave, (b) y-polarized incident wave, (c) PCR, (d)

S 11

and RCS reduction.

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[1]	Si Jia Li, Zhuo Yue Li, Guo Shai Huang, Xiao Bin Liu, Rui Qi Li, Xiang Yu Cao. Digital coding transmissive metasurface for multi-OAM-beam[J]. Front. Phys. , 2022, 17(6): 62501-.

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