Analysis of Two Feeding Techniques by Designing and Simulation of Crown Shape Fractal MSPA

Objectives: In this paper our focal intention is propose a unique design with crown square shape fractal antenna and activate it at multi-frequencies using two feeding methods and evaluate their results. Method: We use three iteration methods, firstly select mgrid from IE3D Zealand software, after creating a new file we select basic parameters 0.025 mgrid size, 1.6mm thickness of FR4 having value 4.4 and loss tangent 0.001. Then select rectangular shape from entity with 10-10 mm length and width and using crown shape to cut slots in rectangular patch and complete our design. We use 10 mm feeding length fed with 50 Ohm in TL Feed and in PB Feed we use (1.8,5) x-y points and simulate it at range of 0-5 GHz and 8-16 GHz frequency in that order. Findings: By using all steps mentioned above we complete our design and simulate it using two different feeding techniques at different frequencies and compare their results. In Transmission line feed our antenna operates at 1.11111 GHz frequency and for probe feed it is 9.77778 GHz and after this we calculate all of its parameters. As shown in Table 1, TL feed return loss is -25.1832, -25.0821, and 24.6284 whereas in PB feed is -16.7513, -18.6701, and 20.1873 in three iterations respectively. Similarly Bandwidth is 71.17%, 71.17%, 70.2% and 9%, 10.03%, 10.25% and VSWR is 1.11654, 1.11789, 1.1247 and 1.34016,1.26384,1.21697 respectively .The value of impedance is 50.6254, 50.6203, 50.2958 and 50.83, 50.16, 49.15 in iteration 1st, 2nd and 3rd individually. As our design is able to operate at different frequencies so we select particular frequency and compare their results by different feeding methods with same design so that it may be useful at different applications. Application: As it is operate at multi-frequency with high bandwidth so it is useful in Telemedicine, RFID, Satellites communication, GPS etc.