Design of a new multiband dielectric resonator antenna for WLAN/WiMAX applications

A novel and petite edge fed dielectric resonator antenna (DRA) is achieved by cutting the right portion of rhombic DRA with a rhombic slot at the centre and also with partial ground plane is presented for wireless communication applications. A strip line is used as feeding structure for the dielectric resonator. Parametric analysis on the antenna is performed using HFSS solver by varying the height of the DR, lengths of the feed line and partial ground structure are presented. From the results it is observed that the proposed DRA has wide frequency range from 4.50GHz to 6.23GHz with an impedance bandwidth of 32.72%. The presented DRA has multiple bands and it resonates at 3GHz (Center frequency of S-Band), 5GHz (IEEE 802.11ac) and 5.8GHz (IEEE 802.16d). The peak gain of the proposed DRA is 4.66dBi and bandwidth offered is 1.73GHz.

I. Introduction

The wireless networking standard IEEE 802.11ac at 5GHz is introduced in recent years due to heavy traffic in the IEEE 802.11a standard at 2.4 GHz. This standard provides higher throughput compared to 2.4GHz band and is used for Wireless LAN Applications. The expected throughput, theoretically by the IEEE 802.11ac standard is 1Gbps to all the users and a throughput of single link of at least 500Mbps. The IEEE 802.16d WiMAX standard available at different broad band frequency ranges for high speed data transmission. The original and allocated 802.16a standard specified for data transmissions in the range 10–66 GHz, but 802.16d allowed lower frequency range of 2-11GHz. For WiMAX applications, various frequency bands are allotted in different parts of the globe, but the frequency band universally used for IEEE 802.16d fixed applications of WiMAX is 5.8 GHz [1]. Low frequency WiMAX applications require a compact and miniaturized antenna.