Tunable wideband absorber based on resistively loaded lossy high-impedance surface

A lossy high-impedance surface comprised of two layers of resistive frequency selective surfaces is employed to design a tunable electromagnetic absorber. The tunability is realized through changing the composite unit cell by moving the top layer mechanically. To explain the absorbing mechanism, an...

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Bibliographic Details
Published inChinese physics B Vol. 24; no. 10; pp. 181 - 185
Main Author 党可征 时家明 汪家春 林志丹 王启超
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.10.2015
Subjects
Absorption
Coefficients
Computer simulation
Equivalent circuits
Frequency bands
Frequency ranges
frequency selective surface
high-impedance surface
microwave absorber
tunable
Unit cell
Wideband
可调
吸收器
宽带吸收
电阻性
等效电路模型
表面设计
负载损耗
高阻抗
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/24/10/104104

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Summary:A lossy high-impedance surface comprised of two layers of resistive frequency selective surfaces is employed to design a tunable electromagnetic absorber. The tunability is realized through changing the composite unit cell by moving the top layer mechanically. To explain the absorbing mechanism, an equivalent circuit model with an interacting coefficient is proposed. Then, simulations and measurements are carried out and agree well with each other. Results show that the complex structure with a thickness less than λ0/4 is able to achieve a wideband absorption in a frequency range from5.90 GHz to 19.73 GHz. Moreover, it is tunable in the operation frequency band.
Bibliography:frequency selective surface, high-impedance surface, microwave absorber, tunable
Dang Ke-Zheng, Shi Jia-Ming,Wang Jia-Chun, Lin Zhi-Dan, Wang Qi-Chao（State Key Laboratory of Pulsed Power Laser, Electric Engineering Institute, Hefei 230037, China）
A lossy high-impedance surface comprised of two layers of resistive frequency selective surfaces is employed to design a tunable electromagnetic absorber. The tunability is realized through changing the composite unit cell by moving the top layer mechanically. To explain the absorbing mechanism, an equivalent circuit model with an interacting coefficient is proposed. Then, simulations and measurements are carried out and agree well with each other. Results show that the complex structure with a thickness less than λ0/4 is able to achieve a wideband absorption in a frequency range from5.90 GHz to 19.73 GHz. Moreover, it is tunable in the operation frequency band.
11-5639/O4
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/24/10/104104