Metamaterial Loaded Aperture Coupled Biodegradable Star-Shaped Dielectric Resonator Antenna For Wlan And Broadband Applications

The design and development technique for the enhancement of bandwidth and gain using biodegradable star-shaped dielectric resonator antenna (SDRA) electrified by two cross-coupled apertures for broadband applications is presented in this article. The SDRA is fabricated using biodegradable PLA, which is a special type of polymer and made from renewable resources instead of nonrenewable petroleum-based resources using additive manufacturing technique. Broad bandwidth of 37% is achieved by modifying rectangular dielectric resonator antenna with feeding it by two apertures (slots) of unequal length to excite different modes. The combination of the circular-shaped split-ring resonator has been used as a metamaterial for gain enhancement, which enhanced the maximum gain of the antenna by similar to 5.4 dB (82.7%). The computed average efficiency within the operating band is similar to 80.51%. The proposed antenna is circularly polarized at 5.8 GHz. The proposed antenna fulfills the bandwidth requirements for the IEEE 802.11a WLAN standards (5.15-5.35 and 5.725-5.825 GHz), and it is also suitable for various other applications such as satellite navigation systems, aeronautical and meteorological radio navigation services in C-band.