Antenna with adaptively focusing on near-field target

Wang Shen-Yun; Zheng Hao-Yu; Li Yang

doi:10.7498/aps.69.20201525

Abstract

To realize near-field target localization and power transfer, an adaptively focusing antenna array is proposed. When a passive target is localized within the near-field zone of an array antenna, the optimal excitation distribution for focusing power onto the object can be obtained by solving an eigenvalue equation, which is established with the tested scattering parameters of the array antenna network. We randomly preset a number of targets with various shapes, materials and positions in the near-field zone, and the corresponding electric field focusing distribution is consistent with the preset target positions. Hence, the proposed near-field adaptively focusing array antenna can automatically focus its radiation onto any target, and such a feature can realize the target localization, tracking and power transfer in the near-field zone of the array antenna.

Keywords:

Authors and contacts

1.
Research Center of Applied Electromagnetics, Nanjing University of Information Science and Technology, Nanjing 210044, China
2.
School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China

Corresponding author: Wang Shen-Yun, wangsy2006@126.com

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 61971231)

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References

[1]	Yang X D, Geyi W, Sun H C 2017 IEEE Antennas Wirel. Propag. Lett. 16 1824 Google Scholar
[2]	González Ayestarán R, León G, Pino M R, Nepa P 2019 IEEE Trans. Antennas Propag. 67 5623 Google Scholar
[3]	Chou H T 2020 IEEE Trans. Antennas Propag. 68 3567 Google Scholar
[4]	Cai X, Gu X Z, Geyi W 2020 IEEE Trans. Antennas Propag. 68 4593 Google Scholar
[5]	Vázquez C, García C, Álvarez Y, Ver-Hoeye S, Las-Heras F 2013 IEEE Trans. Antennas Propag. 61 2874 Google Scholar
[6]	Cheng Q, Alomainy A, Hao Y 2017 IEEE Access 5 18975 Google Scholar
[7]	Li P F, Qu S W, Yang S W 2019 IEEE Antennas Wirel. Propag. Lett. 18 274 Google Scholar
[8]	刘宾, 潘毅华, 闫文敏 2019 68 204202 Google Scholar Liu B, Pan Y H, Yan W M 2019 Acta Phys. Sin. 68 204202 Google Scholar
[9]	Stang J, Haynes M, Carson P, Moghaddam M 2012 IEEE Trans. Biomed. Eng. 59 2431 Google Scholar
[10]	Tofigh F, Nourinia J, Azarmanesh M N, Khazaei K M 2014 IEEE Antennas Wirel. Propag. Lett. 13 951 Google Scholar
[11]	Nguyen P T, Abbosh A, Crozier S 2017 IEEE Trans. Biomed. Eng. 64 1335 Google Scholar
[12]	He X P, Geyi W, Wang S Y 2016 IEEE Antennas Wirel. Propag. Lett. 15 56 Google Scholar
[13]	He X P, Geyi W, Wang S Y 2015 IET Microwaves Antennas Propag. 9 1605 Google Scholar
[14]	Buffi A, Serra A A, Nepa P, Chou H T Manara G 2010 IEEE Trans. Antennas Propag. 58 1536 Google Scholar
[15]	Siragusa R, Lemaître-Auger P, Tedjini S 2011 IEEE Antennas Wirel. Propag. Lett. 10 33 Google Scholar
[16]	Chou H T, Hung T M, Wang N N, Chou H H, Tung C, Nepa P 2011 IEEE Trans. Antennas Propag. 59 1013 Google Scholar
[17]	Chou H T, Lee M Y, Yu C T 2015 IEEE Antennas Wirel. Propag. Lett. 11 1746 Google Scholar
[18]	Bogosanovic M, Williamson A G 2007 IEEE Trans. Instrum. Meas. 56 2186 Google Scholar
[19]	Stephan K D, Mead J B, Pozar D M, Wang L, Pearce J A 2007 IEEE Trans. Antennas Propag. 55 1199 Google Scholar
[20]	Karimkashi S, Kishk A A 2011 IEEE Trans. Antennas Propag. 59 1481 Google Scholar
[21]	Karimkashi S, Kishk A A 2009 IEEE Trans. Antennas Propag. 57 3813 Google Scholar
[22]	Buffi A, Nepa P, Manara G 2012 IEEE Antennas Propag. Mag. 54 41 Google Scholar
[23]	Shan L, Geyi W 2014 IEEE Trans. Antennas Propag. 62 5515 Google Scholar

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图 1 (a) 阵列天线单元结构; (b) 线形阵列天线实物

Figure 1. (a) Structure of the array antenna element; (b) photo of the linear array antenna.

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图 2 阵列天线单元的(a)回波损耗和(b)增益方向图

Figure 2. (a) Return loss and (b) gain pattern of the array antenna element.

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图 3 不同目标位置条件下的测试散射参数　(a) 位置1; (b) 位置2; (c) 位置3

Figure 3. Measured scattering parameters for target with various positions at (a) position-1, (b) position-2 and (c) position-3.

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图 4 归一化电场测试　(a) 测试平台; (b) 可调谐射频馈电电路

Figure 4. (a) Measurement setup of the normalized electrical field and (b) the corresponding tunable radiofrequency feeding circuit.

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图 5 在(a) 位置1、(c) 位置2、(e) 位置3的归一化电场测试分布; 在(b) 位置1、(d) 位置2、(f) 位置3的归一化电场仿真分布

Figure 5. Tested normalized E-field distributions for the target locating at (a) position-1, (c) position-2 and (e) locations-3. Simulated normalized E-field distributions for the target locating at (b) position-1, (d) position-2 and (f) position-3.

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图 6 归一化电场仿真分布　(a) 位置1 (金属圆柱); (b) 位置4 (金属三棱柱); (c) 位置2 (金属圆柱); (d) 位置3 (金属三棱柱)

Figure 6. Simulated normalized E-field distributions for various targets locating at (a) position-1 (metal cylinder), (b) position-4 (metal tri-prism), (c) position-2 (metal cylinder) and (d) position-3 (metal tri-prism).

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图 7 归一化电场仿真分布　(a) 位置1 (甘醇方体); (b) 位置4 (甘醇三棱柱); (c) 位置2 (甘醇方体); (d) 位置3 (甘醇圆柱)

Figure 7. Simulated normalized E-field distributions for various targets locating at (a) position-1 (glycol cube), (b) position-4 (glycol tri-prism), (c) position-2 (glycol cube) and (d) position-3 (glycol cylinder).

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表 1 不同目标位置条件下的聚焦天线激励分布(幅值、相位)

Table 1. Excitations (amplitude, phase) of the focusing array antenna for target at various positions.

No.	Position-1	Position-2	Position-3
1	0.385, ∠53°	0.313, ∠56°	0.320, ∠16°
2	0.211, ∠–72°	0.276, ∠–73°	0.147, ∠–10°
3	0.593, ∠–26°	0.737, ∠–45°	0.657, ∠–116°
4	0.583, ∠–48°	0.407, ∠–14°	0.524, ∠–111°
5	0.315, ∠–147°	0.326, ∠–139°	0.222, ∠–9°
6	0.127, ∠0°	0.110, ∠0°	0.346, ∠0°

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map

[1]	Yang X D, Geyi W, Sun H C 2017 IEEE Antennas Wirel. Propag. Lett. 16 1824 Google Scholar
[2]	González Ayestarán R, León G, Pino M R, Nepa P 2019 IEEE Trans. Antennas Propag. 67 5623 Google Scholar
[3]	Chou H T 2020 IEEE Trans. Antennas Propag. 68 3567 Google Scholar
[4]	Cai X, Gu X Z, Geyi W 2020 IEEE Trans. Antennas Propag. 68 4593 Google Scholar
[5]	Vázquez C, García C, Álvarez Y, Ver-Hoeye S, Las-Heras F 2013 IEEE Trans. Antennas Propag. 61 2874 Google Scholar
[6]	Cheng Q, Alomainy A, Hao Y 2017 IEEE Access 5 18975 Google Scholar
[7]	Li P F, Qu S W, Yang S W 2019 IEEE Antennas Wirel. Propag. Lett. 18 274 Google Scholar
[8]	刘宾, 潘毅华, 闫文敏 2019 68 204202 Google Scholar Liu B, Pan Y H, Yan W M 2019 Acta Phys. Sin. 68 204202 Google Scholar
[9]	Stang J, Haynes M, Carson P, Moghaddam M 2012 IEEE Trans. Biomed. Eng. 59 2431 Google Scholar
[10]	Tofigh F, Nourinia J, Azarmanesh M N, Khazaei K M 2014 IEEE Antennas Wirel. Propag. Lett. 13 951 Google Scholar
[11]	Nguyen P T, Abbosh A, Crozier S 2017 IEEE Trans. Biomed. Eng. 64 1335 Google Scholar
[12]	He X P, Geyi W, Wang S Y 2016 IEEE Antennas Wirel. Propag. Lett. 15 56 Google Scholar
[13]	He X P, Geyi W, Wang S Y 2015 IET Microwaves Antennas Propag. 9 1605 Google Scholar
[14]	Buffi A, Serra A A, Nepa P, Chou H T Manara G 2010 IEEE Trans. Antennas Propag. 58 1536 Google Scholar
[15]	Siragusa R, Lemaître-Auger P, Tedjini S 2011 IEEE Antennas Wirel. Propag. Lett. 10 33 Google Scholar
[16]	Chou H T, Hung T M, Wang N N, Chou H H, Tung C, Nepa P 2011 IEEE Trans. Antennas Propag. 59 1013 Google Scholar
[17]	Chou H T, Lee M Y, Yu C T 2015 IEEE Antennas Wirel. Propag. Lett. 11 1746 Google Scholar
[18]	Bogosanovic M, Williamson A G 2007 IEEE Trans. Instrum. Meas. 56 2186 Google Scholar
[19]	Stephan K D, Mead J B, Pozar D M, Wang L, Pearce J A 2007 IEEE Trans. Antennas Propag. 55 1199 Google Scholar
[20]	Karimkashi S, Kishk A A 2011 IEEE Trans. Antennas Propag. 59 1481 Google Scholar
[21]	Karimkashi S, Kishk A A 2009 IEEE Trans. Antennas Propag. 57 3813 Google Scholar
[22]	Buffi A, Nepa P, Manara G 2012 IEEE Antennas Propag. Mag. 54 41 Google Scholar
[23]	Shan L, Geyi W 2014 IEEE Trans. Antennas Propag. 62 5515 Google Scholar

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Vol. 69, Issue 21 - 2020-11-05

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