Compact Broadband Rectangular Microstrip Patch Antenna

In this paper, using two or more U-slots which are mutually coupled, we are further able to extend the bandwidth achievable by single U-slot. Our Proposed design on 1.6 mm high FR4 substrate is 69 mm X 62 mm (L X W) in size which is vary compact, low profile and conformable. We have chosen licence free band from 7.6 GHz to 9.2 GHz which has not yet been targeted by any commercial product till now. We expect major wave of wireless product for Biomedical, Industrial, Defence and IOT applications in this frequency band in years to come. Our design achieves 1.6 GHz (20%) bandwidth around 8.3 GHz with fairly good gain achievable in low profile substrate. In our design we have introduce Microstrip ring to improve directivity of a antenna. The measured and simulated response shows close agreement thus validating our design