International Journal of Advances in Engineering & Technology, May 2011. ©IJAET


Z in2 = 1


R j C j Lω ω 2 + +


1 2 2 4.0 Results and Discussion


4.1 Design specifications for microstrip patch • Substrate material used = RT Duroid 5870 • Relative permittivity of the substrate εr = 2.32 • Effective relative permittivity εeff = 2.1936 • Thickness of dielectric substrate h = 0.159 cm • Inner radius of the inner ring a1 = 1.518 • Outer radius of the inner ring b1 = 3.187cm • Effective Inner radius of the inner ring ae1 = 1.816 cm • Effective Outer radius of the inner ring be1= 3.514 cm • Inner radius of the outer ring a2 = 3.282 cm • Outer radius of the outer ring b2 = 6.892cm • Effective Inner radius of the outer ring ae2 = 3.608cm • Effective outer radius of outer ring be2 = 7.248 cm • Centre design frequency ,f =


6.2 GHz


The simulation of the proposed antenna is performed using CST software. The model was designed to match 50 ohm of the coaxial probe feed. A glance at the model designed in CST software can be done in figure 5, 6 and 7 given below.


1 (13)


ISSN: 2231-1963


Figure 5: Gap coupled ARMSA model design using CST


Figure6: Top view showing patch, coaxial feed of the model


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Vol. 1,Issue 2,pp.151-158


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