M. N. Sujatha

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In this paper, a stacked ring-patch two layer planar artificial substrate is analyzed numerically and is shown to possess the properties of a high impedance surfaces (HIS). Its properties are evaluated by investigating the surface wave propagation and plane wave reflection characteristics. Its application to reduce the mutual coupling of microstrip antennas(More)
In this paper, microstrip antenna arrays of two and four element are designed using commercially available low cost FR4 material to operate at frequency 2.5GHz. Antenna properties are analysed using IE3D simulation tool. Simulation results show that gain of two element array is 5.5dB and gain of four element array is 9.3dB. Beam width of two element and(More)
In this paper, a stacked ring-patch two layer planar artificial substrate is analyzed numerically and is shown to possess the properties of a high impedance surfaces (HIS). Its properties are evaluated by investigating the surface wave propagation and plane wave reflection characteristics. Its application to reduce the mutual coupling of microstrip antennas(More)
Compact Branch line and Rat-race coupler are analyzed and designed using Artificial Transmission Line (ATL). The couplers are designed to operate at center frequency of 2.5GHz using commercially available FR4 material. Properties are analyzed using IE3D simulation tool. Conventional couplers are also analyzed for comparison purpose. Couplers using ATL show(More)
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