Multi Slotted Rectangular Micro Strip Patch Antenna

A patch antenna (also known as a rectangular micro strip antenna) is a type of radio antenna with a low profile, which can be mounted on a flat surface. It consists of a flat rectangular sheet or "patch" of metal, mounted over a larger sheet of metal called a ground plane. Microstrip patch antennas radiate primarily because of the fringing fields between the patch edge and the ground plane. For good antenna performance, a thick dielectric substrate having a low dielectric constant is desirable since this provides better efficiency, larger bandwidth and better radiation. However, such a configuration leads to a larger antenna size. In order to design a compact Microstrip patch antenna, substrates with higher dielectric constants must be used which are less efficient and result in narrower bandwidth. Hence a trade-off must be realized between the antenna dimensions and antenna performance. A new shape of multiband hybrid microstrip patch antenna is presented in this paper. A simple and planner structure of proposed antenna fulfils the requirements of L and C band of IEEE standard at very low cost. Proposed antenna structure is obtained by combining Minkowski and invented Koch curve and then this curve and then this curve is applied at four sides of a square patch. Multiband behavior of antenna is achieved and better values of Return Loss (RL), Gain (G) and Radiation Pattern is achieved due to small size. Simulated and measured results of proposed antenna cover ten resonant frequencies (1.00, 1.88, 2.91, 3.57, 4.85, 5.47, 5.70, 6.46, 6.73 and 7.74) ghz in L, S and C band. Better value of gain up to 20.9 Db is achieved. High Frequency Structural Simulation (HFSS) tool is used to simulate the proposed antenna.