The proposed metamaterial antenna achieves the antenna resonate at GHz, the gain of higher than dB and the bandwidth of 110 MHz through the whole WLAN band. The obtained results indicate that the proposed antenna is a good candidate for WLAN applications. | Journal of Science and Technology 54 (6) (2016) 689-697 DOI: A MINIATURIZATION OF MICROSTRIP ANTENNA USING NEGATIVE PERMITIVITY METAMATERIAL BASED ON CSRRLOADED GROUNDFOR WLAN APPLICATIONS Phan Duy Tung, Phan Huu Lam, Nguyen Thi Quynh Hoa* Department of Electronics and Telecommunications, Vinh University 182 Le Duan, Vinh City, Nghe An Province, Vietnam * Email: ntqhoa@ Received: 3 June 2016; Accepted for publication: 15 August 2016 ABSTRACT A microstrip antenna using negative permittivity metamaterial based on complementary split ring resonator (CSRR)-loaded ground has been investigated in order to miniaturize the size and improve the antenna characteristics. The antennas are designed on FR4 material and simulated results are provided by HFSS software. The metamaterial antenna is reduced 77 % the antenna size compared to the normal microstrip antenna. Furthermore, compared with the normal microstrip antenna, the antenna characteristics of the metamaterial antenna are improved significantly. The proposed metamaterial antenna achieves the antenna resonate at GHz, the gain of higher than dB and the bandwidth of 110 MHz through the whole WLAN band. The obtained results indicate that the proposed antenna is a good candidate for WLAN applications. Keywords: microstrip antenna; metamaterials; split ring resonator (SRR); complementary split ring resonator (CSRR); WLAN. 1. INTRODUCTION Microstrip antennas are of great interest due to their benefit features such as low profile, low cost, planar configuration, and suitable for array with the ease of fabrication and integration with microwave monolithic integrate circuits (MMICs). This promotes them to become the most promising candidates for practical applications such as mobile, radio-frequency identification (RFID), multiple-input multiple-output (MIMO), sensor network, biomedical, wearable systems [1 - 5]. However, this antenna structure is wavelength-related, which .
