The book describe a novel design and analysis of an antenna with medium band and high band frequency application range. The aim is to design and fabricate a coaxial fed microstrip patch antenna. Low dielectric constant substrates are generally preferred for maximum radiation. The rectangular, elliptical and triangular patch antenna are designed by varying the ground dimensions, patch and substrate dimensions. Main aim is to design an antenna which is capable to absorb harmful radiations and obtain a suitable material which is used for making a patch or substrate. With the discovery of CNT & Nanomaterial's, it is possible to use various techniques for absorption of EMI radiations. Substrate material can further be modified by adding allows of Bismuth ferrites to substrate for EMI absorption material. During designing antenna different types of material can be choose to create substrate or patch, these materials are aluminum, bismuth ferrites, copper, FR4 epoxy, GaAs, glass, gold, mica, silicon and many more. Mainobjective is to design and work on the allocation of frequency bands for maximum absorption antenna for desired frequency band.