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Rectangular Microstrip Antenna with Air Cavity for High Gain and Improved Front to Back Ratio

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Figure

Figure 1. Rectangular Microstrip Antenna with Air Cavity. (a) Top View; (b) Cross sectional view
Table 1. Comparison of Radiation Characteristics for Patches with Conventional and Composite Substrates (proposed) hav-ing different aspect ratio: Substrate Thickness = 1.575 mm
Figure 3. Top view of the Microstrip patch (Physical aper-ture and effective radiating aperture including fringing

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