queries regarding patch antenna

[sonika jha]

Hello sir
while going through the topic of patch antenna I came across a
statement which goes like-"the current at the end of the patch is
zero, its maximum at the center of the half wave patch & zero at the
beginning of the patch ",which led to a number of questions popping
up in my mind & unfortunately none of them being exactly answered by
the references being mined by me till yet .I've got a little idea that
this phenomena has got something to do with the wave nature of the AC
RF signals being supplied to the antenna but will you please bother to
explain this in context of the amplitude & magnitude of the surfacial
current dirtribution & also that does the current distribution vary
sinusoidally with time?sir please channelise me in this direction,for
googling doesn't seem to have shed a whole lot of light.thnku...

 

[brothers]

As I recall, my education on this and related topics spanned two semesters at MIT. That was fifty years ago, and a lot of theory and practice have been developed since. It's not a simple topic.

For a broad-brush introduction to antenna theory, I'd recommend "The ARRL Antenna Book". There are a couple of mentions of patch antennas.