IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) e-ISSN: 2278-2834,p- ISSN: 2278-8735.Volume 14, Issue 3, Ser. I (May.-June. 2019), PP 40-48 www.iosrjournals.org DOI: 10.9790/2834-1403014048 www.iosrjournals.org 40 | Page Design of Irregular M Shape Microstrip Patch Antenna with U Slots For Broadband and C Band Applications Satyendra Kumar Swarnkar 1 , Dr.Anand Kumar Tripathi 2 ,Dr.Zakir Ali 3 1 (Research Scholar in Electronics and communication Department, P.K. University Thanara ,Shivpuri,India) 2 (Professor in P.K. University Thanara ,Shivpuri, India) 3 (Associate Professor in Electronics and communication Department, Bundelkhand University, Jhansi India) Corresponding Author: Satyendra Kumar Swarnkar Abstract: This paper presents the enhance in bandwidth of a Microstrip patch Antenna using an irregular polygon (M shape)and using U slots technique for enhancing bandwidth for broadband and fed by Microstrip line using coaxial probe. The main aim of proposed work is to obtain a Hues bandwidth and the size of antenna is reduced. The proposed microstrip antenna has a wide bandwidth, the range from3.30-6.85 GHz. The wide bandwidth achieved 71% and the VSWR is less than 2.The other parameters are as our research requirements antenna simulated on the Zeeland IE3D software. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 09-05-2019 Date of acceptance: 25-05-2019 -------------------------------------------------------------------------------------------------------------------------------------- I. Introduction Antennas are a very important device of communication systems [1]. By definition, an antenna is a device used to transform an RF signal, traveling on a conductor, in to an electromagnetic wave in free space the broadband linear polarized MSA, play a important role in wireless system due to its low-profile, small-size and light weight. As well known, a linearly polarized wave can be obtained when spatially orthogonal modes are excited with equal amplitude. Conventional designs [2] of MSA for linearly polarization are usually achieved by truncating patch corners, cutting U slots in the radiating plate for the C Band Application.The C band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 GHz, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users. The C band (4 to 8 GHz) is used for many satellite communications transmissions, some Wi-Fi devices, some cordless telephones as well as some surveillance and weather radar systems.The communications C band was the first frequency band that was allocated for commercial telecommunications via satellites. The same frequencies were already in use for terrestrial microwave radio relay chains. Nearly all C-band communication satellites use the band of frequencies from 3.7 to 4.2 GHz for their downlinks, and the band of frequencies from 5.925 to 6.425 GHz for their uplinks. Note that by using the band from 3.7 to 4.0 GHz, this C band overlaps somewhat into the IEEE S band for radars.The C-band communication satellites typically have 24 radio transponders spaced 20 MHz apart, but with the adjacent transponders on opposite polarizations.Hence, the transponders on the same polarization are always 40 MHz apart of the 40 MHz, each transponder utilizes about 36 MHz[10]. II. Material Used The first design step is to choose a suitable dielectric substrate with appropriate thickness and appropriate value of loss tangent. A thicker substrate is not only being mechanically strong but also will increases the radiated power, reduce conductor losses and improve impedance bandwidth however it will also increase the weight, dielectric loss, surface wave loss and extraneous radiations from the probe field. The substrate[2] taken for the designing is Glass epoxy which is very cost effective (Rs. 600 for 1 Sq. foot) and possesses nearly all appropriate characteristic for designing an antenna, value of h is 1.6 mm and loss tangent is 0.012. The first design step is to choose a suitable dielectric substrate of appropriate thickness h and losstangent [3]. A thicker substrate, besides being mechanical strong, will increase the radiated power, reduceconductor loss, and improved impedance, bandwidth, however it will also increase the weight, dielectric loss,surface wave loss, and extraneous radiations from the probe field. Substrate dielectric constant ε r plays a rolesimilar to that of the substrate thickness.