![]() Assuming the patch antenna is divided into four regions, it can be modeled as a series of transmission lines loaded by radiating slots of different length. Hence, in the following discussion, the spacing between the patch conductor and feed line is kept constant, equal to the feed line's width variations in the input impedance at resonant frequency with respect to inset length will studied as a function of various parameters. ![]() ![]() Variations in the inset length do not produce any change in resonant frequency, but a variation in the inset width will result in a change in resonant frequency. ![]() The input impedance of an inset-fed microstrip patch antenna depends mainly on the inset distance, y 0, and to some extent on the inset width (the spacing between the feed line and the patch conductor). ![]()
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