A UWB Fractal Slot Patch Antenna with Ground Optimization

摘要

A miniaturized patch monopole ultra-wideband (UWB) antenna of size 18mm × 12mm ×1.6mm on commercially available FR4 material with dielectric constant 4.4 is proposed. The antenna consists of insertion of fractal slot geometries to obtain the desired very large band characteristics. While the modification in the various patch length provides perfect match of impedance bandwidth. Therefore, it provides a very ultra wide band from 1.55 to 12.0 GHz inclusive of all associated applications released by FCC. Choice of suitable filter makes the antenna widely useful for particular band of operation. The proposed structure consists of several half wave length slots interconnected with each other. In this article, the variation of ground geometry with respect to slot insertion is depicted. The design validation is made through successive simulation and proposed antenna is fabricated for measurement of return loss and VSWR parameters. The radiation properties are also found consistent over the ultra wide band.