Can any body please tell me, what are the dimensions of a micro strip line circular patch antenna at 8.5GHz and what are the design equations to be followed?
Dear manoj,
Thank you for your answer. But, I want design equations.......
Refer
Balanis, Constantine. “Microstrip Antennas.” Antenna Theory, 2ndEd. New York, Wiley, 1997.
DESIGN PROCEDURE:
1. Specify er, fr (in Hz ), and h (in cm).
2. Determine the actual radius a of the patch.
a = F/({1+(2h/(pi*er*F)[ln(pi*F)+1.7726]}^1/2).
where F = (8.791*(10^9))/(fr*sqrt(er))
I want equations not for co-axial type feeding. Need micro strip line feed.......
Hi, Anvesh
How are you?
Are you need the dimension's equation of feed line (microstrip feed line)?
If, you need equation of dimension equation of feed line, please go to " Microwave Engineering" by Pozer, Chapter three, paper 148.
With my best regards
Why don't you find the input impedance of the circular patch and impedance match to a microstrip feed line with a quarter wave transformer? For this, first design the circular patch using the equations below:
DESIGN PROCEDURE:
1. Specify er, fr (in Hz ), and h (in cm).
2. Determine the actual radius a of the patch.
a = F/({1+(2h/(pi*er*F)[ln(pi*F)+1.7726]}^1/2).
where F = (8.791*(10^9))/(fr*sqrt(er))
, then impedance match it to a microstrip feed line with the help of a quarter wave transformer. The width and length of the microstrip feed line has to be equal to the port impedance of 50 Ohms.
Hello Mr. Anvesh
These are the usefule equations to calculat the width of microstrp feed line.
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