r/rfelectronics • u/Fine_Aerie6732 • 3d ago

question Need Explanation about patch antenna

So, this is a patch antenna a design for 2.4GHz and my question is specific to that notch inside red circle basically initially my impedance is more inductive +j73ohm but as i increase the width of the gaps it goes to zero then starting going into capacitive -j ohm like at first i thought that it may be just "mutual inductance" and i don't get any proof of it and well i am unable to understand the mechanism so can somebody explain this thing or give me some reference of book or something.

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u/[deleted] 3d ago

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u/Fine_Aerie6732 3d ago

Thanks for helping me friend. i am still a beginner for all this RF and antenna thing and always connect positive reactance to inductance and negative reactance to capacitance but from now i will keep this in mind.