Design and cavity model analysis of inset feed rectangular microstrip patch antenna

This paper presents the design of microstrip rectangular patch antenna operating at 2.4GHz frequency. The same was developed and tested experimentally using a network analyzer in Sumeru Microwave Communication Lab. Practically its resonance frequency is 2.4GHz with -15dB return loss and bandwidth is 55.7MHz. Along with that the cavity model analysis is presented. Characteristic modes are real current modes that can be computed numerically for conducting bodies of arbitrary shape. Since characteristic modes form a set of orthogonal functions, they can be used to expand the total current on the surface of the body. The simulated results of characteristics modes of microstrip Rectangular patch antenna are presented. The resonance frequency and radiating behaviour of associated modes is provided. This paper shows that what makes current modes really attractive for antenna design is the physical insight they bring into the radiating phenomena taking place in the antenna. The same has been concluded with its futuristic perspective for research aspirants and microwave engineers.