Enhancement of gain and directivity for microstrip antenna using negative permeability metamaterial

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• 作者：Xiang-Jun Gao ^{Tggxj111@163.com" class="auth_mail" title="E-mail the corresponding author} ; Tong Cai ; ^{caitong326@sina.cn" class="auth_mail" title="E-mail the corresponding author} ; Li Zhu ^{tgzb821@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：μ-Negative MTM ; Patch antenna ; High gain ; Narrow beamwidth ; Surface wave
• 刊名：AEU - International Journal of Electronics and Communications
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：70
• 期：7
• 页码：880-885
• 全文大小：1344 K

文摘

A method to improve the gain and directivity of the patch antenna using permeability negative metamaterial (MTM) cells is proposed. Composing of dual-layer symmetry single ring resonator pair (D-SSRRP) embedded on both sides of the dielectric layer, the MTM cell is easy to integrate with a patch antenna and can be used as an insulator to reflect surface waves based on the μ-negative characteristic. By inserting the D-SSRRP-loaded MTM cells with different dimensions around the conventional patch antenna, a dual-band antenna with high gain and narrow beamwidth is designed, which operates at 5.2 GHz and 6.75 GHz for WLAN. As a result, both the numerical and experimental results illustrate that the μ-negative D-SSRRP-loaded MTM antenna achieves a good radiation performance: at both working frequencies, the antenna gain has increased at least 2.2 dB and the half-power beam width (HPBW) decreased around 20° compared with that of the conventional microstrip patch antenna.