need a very basic help

hey guys... i am designing a patch antenna please tell me how to find the position of port.
(i am at very beginning level, concepts are not clear..so need ur help.)

Here is a basic hint: use the search function (upper right corner of this page), keyword "patch".

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Microwaves101.com - A practical resource covering the fundamental principles of microwave design

Most modern books on antennas have a chapter or two on patches. The basic idea is that a patch can be thought of as a leaky transmission line or capacitor. The fringing fields are what produces the antenna characteristics.