Wideband Microstrip Patch Antenna at 7 GHz - Sonnet Software

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27th Annual Review of Progress in Applied Computational ElectromagneticsMarch 27-31, 2011 - Williamsburg, Virginia ©2011 ACESFig. 4. Far field radiation pattern of the antenna at 7.1 GHz.The current on the antenna can be seen on Figure 5. As the affect on the gain is explained insection 2, the current is very crowded at the bottom horizontal metal radiator located at the input of theantenna.Fig. 5. Current distribution on the antenna at 7.1 GHz.Finally, in order to get rid of the long edge-feeding line, probe-feeding is applied. Figure 6 hasthe top view, and Figure 7 has the 3D view of the probe-feeded antenna.264
27th Annual Review of Progress in Applied Computational ElectromagneticsMarch 27-31, 2011 - Williamsburg, Virginia ©2011 ACESFig.6. Top view of the probe-fed antenna.Fig.7. 3D view of the probe-fed antenna.Figure 8 has the return loss of the antenna at 6.92 GHz and 6.99 GHz. Figure show that,magnitude odf the return loss and the center frequency did not change much as compared to edgefeeding,but bandwidth decreased to 4%.BW =4 %Fig. 8. Return loss of the patch antenna.Real part of the input impedance is 57.04 Ω, and the imaginary part of the input impedance is–7.1 Ω and maximum gain is 6.83 dB for the 6.92GHz. Radiation pattern is on Figure 9. As it is seenon the figure that, the cross-pol. level (E-theta) is increased to approximately –10 dB, at the endfireradiation directions.265
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Wideband Microstrip Patch Antenna at 7 GHz - Sonnet Software

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