This paper presents a dual-band step impedance resonator (SIR) antenna based on metamaterial-inspired periodic structure of coupled complementary split-ring resonators substrate-integrated waveguide (CSRR-SIW). The antenna supports wireless local area networks (WLAN) bands at 2.4/5.2/5.8 GHz. The CSRRs and two branches of the SIR element are etched on the top and bottom metal surfaces of the substrate. The SIR element produces a fundamental frequency f₁ at 2.4 GHz and a second harmonic frequency f_s2 at 5.7 GHz. Meanwhile, the CSRRs produces a resonant frequency at high-frequency band around 5.2 GHz, which can be combined with the second harmonic frequency f_s2 at 5.7 GHz. The high-frequency bandwidth can then be broadened. The simulated and measured results show that the dual operation bands with bandwidths of 16% from 2.25 GHz to 2.64 GHz and 18.2% from 5 GHz to 6 GHz for |S11| < −10 dB are achieved. Meanwhile, the proposed antenna has peak gains ranging from 6.5 dBi to 7 dBi and from 7 dBi to 7.7 dBi in the lower and upper bands, respectively. Compared with many previously reported dual-band antenna designs, the proposed antenna achieves comparable bandwidth performance and larger gain per unit area with a relatively smaller size. Moreover, the simple structure renders the proposed antenna has the advantage of easy-processable and cost-effective implementation.

中文翻译：

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基于CSRR增强的SIW的2.4 / 5.2 / 5.8 GHz WLAN高增益SIR双频天线

本文提出了一种基于超材料启发的耦合互补开口环谐振器衬底集成波导（CSRR-SIW）的周期性结构的双频带步进阻抗谐振器（SIR）天线。该天线支持2.4 / 5.2 / 5.8 GHz的无线局域网（WLAN）频段。在衬底的顶部和底部金属表面上蚀刻CSRR和SIR元件的两个分支。SIR元件在2.4 GHz时产生基本频率f ₁，在5.7 GHz时产生二次谐波频率f _s2。同时，CSRR会在5.2 GHz左右的高频段产生谐振频率，可以与二次谐波频率f _s2组合在5.7 GHz下 然后可以扩展高频带宽。仿真和测量结果表明，对于| |，双工作频带的带宽从2.25 GHz至2.64 GHz为16％，从5 GHz至6 GHz为18.2％。S 11 | 达到<-10 dB。同时，所提出的天线在较低和较高频段的峰值增益分别为6.5 dBi至7 dBi和7 dBi至7.7 dBi。与许多先前报道的双频天线设计相比，拟议的天线以相对较小的尺寸实现了相当的带宽性能和较大的单位面积增益。而且，简单的结构使得所提出的天线具有易于处理和成本有效的实施方式的优点。