Feed point location for rectangular patch antenna

I need some documents of calculating the coaxial feed point location for rectangular microstrip patch antennas.
Anyone can help me!
Thank you!

hi you can read the "MICROSTRIP ANTENNAS"by "BAHL".
in CHAPTER 2 you can find your answer.

Hi ,
see the attachment..Isuggest u go through handbooks on the reqd antenna to understand better

please send me the copy of that book...microstrip antennas by bahl.please

See [ https://www.edaboard.com/announcements36.html ]

Dear Sir,

Good afternoon. i am sorry. i commited mistake.please forgive me.