An ultrawideband linear-to-circular polarization converter based on multiphysics regulation

Zeng Li; Liu Guo-Biao; Zhang Hai-Feng; Huang Tong

doi:10.7498/aps.68.20181615

Abstract

In order to design a tunable linear-to-circular polarization converter in microwave band, an ultra-broadband linear-to-circular polarization converter (LCPC) based on multiphysics regulation is proposed and studied by combining solid state plasma and vanadium dioxide (VO₂) in this article. By using the electric control way to control the states of the solid plasma resonator, the solid state plasma can generate excitation and non-excitation state. By using the temperature (T) control way to regulate the phase transition state of the VO₂ resonator, the VO₂ can generate insulating and metallic state. The purpose of dynamic shift of the proposed LCPC′s operating band can be realized. The polarization conversion rate curve, reflection phase curve, the axial ratio curve and the surface current diagram of the proposed LCPC are analyzed and simulated by the full-wave simulation software HFSS and the effects of parameters r₁ and r₃ on the axial ratio are also discussed. When none of all the solid plasma regions are excited and T < 68 ℃ , the presented LCPC is in No. 1 state. On the basis of No. 1 state, if all the solid state plasma are excited, the presented LCPC is in No. 2 state. Similarly, on the basis of No. 1 state, the presented LCPC will be transformed to No. 3 state when T ≥ 68 ℃. The axial ratio band which is less than 3 dB (3 dB AR band) is 14.3−29.7 GHz (the relative bandwidth is 70%) in No. 2 state. The 3 dB AR bands which are 14.4−23.4 GHz and 28.6−35.9 GHz (the relative bandwidths are 47.61% and 22.64%) show that the proposed LCPC has the ability to shift the working band to high frequency range. When switching the LCPC to No. 3 state, the 3 dB AR bands which are 8.4−11.2 GHz and 18.7−29.5 GHz (the relative bandwidths are 28.57% and 44.81%) are shifted to low frequency region. Compared with traditional LCPC, our design has the advantages of diverse control means, wide bandwidth, flexible design and strong functionality. At the same time, this LCPC presents a new design method and idea for multiphysical field regulated devices.

Keywords:

linear-to-circular polarization converter /
ultra-broadband /
multiphysics /
tunability

Authors and contacts

1.
College of Electronic and Optical Engineering and College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
2.
National Electronic Science and Technology Experimental Teaching Demonstrating Center, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
3.
National Information and Electronic Technology Virtual Simulation Experiment Teaching Center, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
4.
State Key Laboratory of Millimeter Waves of Southeast University, Nanjing 210096, China

Corresponding author: Zhang Hai-Feng, hanlor@163.com

Funds: Project supported by the Open Research Program of State Key Laboratory of Millimeter Waves of Southeast University, China (Grant No. K201927) and the University-Level University Students' Innovative Training Programs.

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References

[1]	Ling F, Zhong Z, Huang R, Zhang B 2018 Sci. Rep. 8 9843 Google Scholar
[2]	Yan B, Zhong K, Ma H, Li Y, Sui C, Wang J, Shi Y 2017 Opt. Commun. 383 57 Google Scholar
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Cited By

图 1 线-圆极化转换器结构单元示意图　(a)正视图; (b)侧视图; (c)立体图

Figure 1. Structure schematic of the unit cell for linear-to-circular polarization converter: (a) Front view; (b) side view; (c) stereogram.

DownLoad: Full-Size Img PowerPoint

图 2 线-圆极化转换器在三种工作状态下的极化转换率和反射相位差曲线　(a)工作状态一; (b)工作状态二; (c)工作状态三

Figure 2. Polarization conversion rate curves and reflection phase difference curves of linear-to-circular polarization converter in three states: (a) No.1 state; (b) No.2 state; (c) No.3 state.

DownLoad: Full-Size Img PowerPoint

图 3 线-圆极化转换器在电控和温控时的轴比曲线　(a)电控时, 工作状态一、二的轴比曲线; (b) 温控时, 工作状态一、三的轴比曲线

Figure 3. Axial ratio curves of linear-to-circular polarization converter when using electric control and temperature control: (a) Axial ratio curves in No. 1 state and in No. 2 state when using electric control; (b) axial ratio curves in No. 1 state and in No. 3 state when using temperature control.

DownLoad: Full-Size Img PowerPoint

图 4 线-圆极化转换器在三种工作状态下, 顶层谐振单元与底层反射板在不同频点处的表面电流图　(a)工作状态一时, 15.03 GHz频点处; (b)工作状态一时, 21.3 GHz频点处; (c)工作状态二时, 32.5 GHz频点处; (d)工作状态三时, 10 GHz频点处

Figure 4. Surface current diagrams of the top resonant unit and the bottom reflector at different frequency points in three states, respectively: (a) No.1 state at 15.03 GHz; (b) No.1 state at 21.3 GHz; (c) No.2 state at 32.5 GHz; (d) No.3 state at 10 GHz.

DownLoad: Full-Size Img PowerPoint

图 5 当其他参数不变, 结构参数r₁和r₃在不同取值时的轴比曲线　(a) r₁ = 0.71, 0.81, 0.91 mm; (b) r₃ = 1.82, 1.87, 1.92 mm

Figure 5. Axial ratio curves for parameters r₁ and r₃ at different values when other parameters remain unchanged: (a) r₁ = 0.71, 0.81, 0.91 mm; (b) r₃ = 1.82, 1.87, 1.92 mm.

DownLoad: Full-Size Img PowerPoint

表 1 线-圆极化转换器的参数

Table 1. Parameters of linear-to-circular polarization converter.

参数/mm 数值参数/mm 数值

a 0.2417 h₁ 1.5
b 0.48 h₂ 0.5
c 0.47 p 4.8
d 0.35 r₁ 0.81
e 0.68 r₂ 1.1583
f 1.2 r₃ 1.87
g 0.8 w 0.018

DownLoad: CSV

[1]	Ling F, Zhong Z, Huang R, Zhang B 2018 Sci. Rep. 8 9843 Google Scholar
[2]	Yan B, Zhong K, Ma H, Li Y, Sui C, Wang J, Shi Y 2017 Opt. Commun. 383 57 Google Scholar
[3]	杨化 2015 硕士学位论文 (南京: 南京航空航天大学) Yang H 2015 M.S. Thesis (Nanjing: Nanjing University of Aeronautics and Astronautics) (in Chinese)
[4]	Cheng Y Z, Withayachumnankul W, Upadhyay A, Headland D, Nie Y, Gong R Z, Bhaskaran M, Sriram S, Abbott D 2014 Appl. Phys. Lett. 105 181111 Google Scholar
[5]	Su H, Lan F, Yang Z, Zhang Y, Shi Z, Li M, Shi M, Luo F, Liang Z 2016 Antennas, Propagation and EM Theory (ISAPE), 2016 11th International Symposium on. IEEE Guilin, China, October 18−21, 2016 p206
[6]	Ma H F, Wang G Z, Kong G S, Cui T J 2014 Opt. Mater. Express 4 1717 Google Scholar
[7]	Zhai Y C, Wu Q, Tan J J, Tao H, Gao F H, Zhu J H, Zhang Z Y, Du J L, Hou Y D 2015 Microelectron. Eng. 145 49 Google Scholar
[8]	Zhang H F, Zhang H, Yao Y, Yang J, Liu J X 2018 IEEE Photonics J. 10 1
[9]	余志洋, 刘少斌, 薛峰, 李海明 2015 2015年全国微波毫米波会议, 合肥市, 2015年5月30日—6月2日, 第522页 Yu Z Y, Liu S B, Xue F, Li H M 2015 2015 National Conference on Microwave and Millimeter Wave Hefei, May 30−June 2, 2015 p522 (in Chinese)
[10]	Kong X K, Mo J J, Yu Z Y, Shi W, Li H M, Bian B R 2016 Int. J. Mod Phys. B 30 1650070 Google Scholar
[11]	Song Z, Wang K, Li J, Liu Q H 2018 Opt. Express 26 7148 Google Scholar
[12]	Zylbersztejn A, Mott N F 1975 Phys. Rev. B 11 4383 Google Scholar
[13]	Ha S D, Zhou Y, Fisher C J, Ramanathan S, Treadway J P 2013 J. Appl. Phys. 113 184501 Google Scholar
[14]	Huang W X, Yin X G, Huang C P, Wang Q J, Miao T F, Zhu Y Y 2010 Appl. Phys. Lett. 96 261908 Google Scholar
[15]	Liu Z M, Li Y, Zhang J, Huang Y Q, Li Z P, Pei J H, Fang B Y, Wang X H, Xiao H 2017 IEEE Photonic. Tech. L. 29 1967 Google Scholar
[16]	Madan H, Zhang H T, Jerry M, Mukherjee D, Alem N, Engel-Herbert R, Datta S 2015 Electron Devices Meeting (IEDM), 2015 IEEE International Washington DC, USA, December 7−9, 2015 p9
[17]	Vitale W A, Paone A, Fernandez-Bolanos M, Bazigos A, Grabinski W, Schuler A, Ionescu A M 2014 Proceedings of the 72nd Annual Device Research Conference (No. EPFL-CONF-200324), Santa Barbara, California, USA, June 22−25 2014 p1528
[18]	Kats M A, Blanchard R, Genevet P, Yang Z, Qazilbash M M, Basov D N, Ramanathan S, Capasso F 2013 Opt. Lett. 38 368 Google Scholar
[19]	Cai H, Chen S, Zou C, Huang Q, Liu Y, Hu X, Fu Z, Zhao Y, He H, Lu Y 2018 Adv. Opt. Mater. 6 1800257 Google Scholar
[20]	余志洋 2016 硕士学位论文 (南京: 南京航空航天大学) Yu Z Y 2016 M.S. Thesis (Nanjing: Nanjing University of Aeronautics and Astronautics) (in Chinese)
[21]	杨靖, 章海锋, 张浩, 刘佳轩 2018 激光与光电子学进展 55 091602 Yang J, Zhang H F, Zhang H, Liu J X 2018 Laser & Optoelectronics Prog. 55 091602
[22]	Zhao Y, Huang Q P, Cai H L, Lin X X, Lu Y L 2018 Opt. Commun. 426 443 Google Scholar
[23]	Wen Q Y, Zhang H W, Yang Q H, Chen Z, Long Y, Jing Y L, Lin Y, Zhang P X 2012 J. Phys. D: Appl. Phys. 45 235106 Google Scholar
[24]	Li W, Chang S J, Wang X H, Lin L, Bai J J 2014 Optoelectronics Lett. 10 180 Google Scholar
[25]	施维 2017 硕士学位论文 (南京: 南京航空航天大学) Shi W 2017 M.S. Thesis (Nanjing: Nanjing University of Aeronautics and Astronautics) (in Chinese)
[26]	于惠存, 曹祥玉, 高军, 韩江枫, 周禹龙 2018 空军工程大学学报 (自然科学版) 19 60 Google Scholar Yu C H, Cao X Y, Gao J, Han J F, Zhou Y L 2018 J. Air Force Eng. Univ. (Nat. Sci. Ed.) 19 60 Google Scholar

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