Design of meander line antenna using low tangent loss material

Abstract

The meander line antenna is designed for wireless application using CST-MWS. The antenna design requires lots of analysis like substrate material, dielectric constant, loss tangents, port selection etc. The FR4 is widely available and chip material for antenna design. But tolerances are quite high because FR4 is a considerably less expensive board. Therefore, it is challenging to determine the relative dielectric constant's exact value. In this research antenna is designed using 4.4 dielectric constant material. A mixture of flame-retardant epoxy resin and glass fabric is used to create the FR4 class of printed circuit board base materials. FR stands for flame retardant and complies with UL94V-0 standards.A two-element meander line antenna is created for this study. The MIMO antenna is 90 × 31 × 1.6 mm3 in total. A single patch meander antenna measures 45x31 mm2. Good isolation performance between antenna elements is produced by the high isolation. The suggested MIMO antenna is designed with meander arms since the basic rectangular traditional patch required more space than the meander line structure did. The recommended antenna's envelope correlation coefficient (ECC) is less than 0.014. The gain of the MIMO antenna is 0.4 dB, and the directivity of the antenna is 6.85 dBi. The MIMO antenna's bandwidth ranges from 4.88 to 4.97 GHz, and it resonate at 4.93 GHz. The antenna has a return loss of −44 dB and a bandwide isolation of more than 22 dB. The material consider here as FR-4 substrate (lossy) (Ɛr = 4.3), h = 0.078 mm and t = 0.07 mm with low tangent losses. The thermal conductivity of material is varies from 2.2 to 2.5 cal/h. cm Deg C. The coefficient of thermal expansion is 11 µm/m/Deg. C. The MIMO antenna performance parameter is evaluated by considering FR-4 material and it is found satisfactory to fulfill the wireless antenna design needs.