coaxial feed
hi
well you havent mentioned which simulation software you are using.
if you mention this and also post your model than someone may give you some advice
regards
Hi.. Thanks ..
I'm using Zeland IE3D for simulation.
Added after 28 minutes:
I'm new to the field of RF and microwave. i wanna design the 2.45Ghz patch antenna.. Is anybody have the design procedure, parameters and calculation methods.
well unfortunately i am not using this software so i cant give you any help.
i hope someone using IE3D will see this post and help you
regards
Thanks for spent time to read my post.. Do u have idea about HFSS
hi there
i can give you any advice on CST MWS.
unfortunately i havent used HFSS that much
regards
Anyone know how to model the coaxial feed of a patch antenna with FDTD please?
Hi,
You can provide a coaxial feed to a microstrip antenna in HFSS by following way:
1. Determine which cable you are going to use lets say RG316.
2. Get its inner and outer diameter and the dielectric values.
3. model the coaxial cable in a seperate HFSS project. take the length to be say 5mm.
4. at both ends apply circular sheets, use lumped port or wave port at both ends and apply line of integration between the inner and outer conductors.
5. simulate for a very wide frequency range and check for return loss if it is well below -40 or -50 dB then its ok to use otherwise change the dimensions of outer conductor or inner .to get a decent return loss. idea is to use a caxial cable characteristic impedance calculators and then then play around those values.
once you get a good cable response use same dimensions in you main project by uniting the inner conductor to the microstrip feed and uniting the ground plane to outer of coaxial cable and run the simulation.
Hope this helps
-Ankesh
In IE3D it is very easy.. Just click on probe feed to patch icon present in menu bar. Then window will pop up. In that window mention X and Y position of feed and no of segments ( generally eighteen), then specify the radius of feed probe.
Hope this will be useful to u.
hi,,, im using CST MWS to design a rectangular microstrip patch antenna...
my feeding type is Coaxial Probe...
pls help me how to design the probe feeding method in cst...
thank you...
one of the example in cst help manual is about patch antenna by coax -probe if you dont understand that example ,please send me your mail.my mail is (nf707at yahoo.com)
Hi,
You can provide a coaxial feed to a microstrip antenna in HFSS by following way:
1. Determine which cable you are going to use lets say RG316.
2. Get its inner and outer diameter and the dielectric values.
3. model the coaxial cable in a seperate HFSS project. take the length to be say 5mm.
4. at both ends apply circular sheets, use lumped port or wave port at both ends and apply line of integration between the inner and outer conductors.
5. simulate for a very wide frequency range and check for return loss if it is well below -40 or -50 dB then its ok to use otherwise change the dimensions of outer conductor or inner .to get a decent return loss. idea is to use a caxial cable characteristic impedance calculators and then then play around those values.
once you get a good cable response use same dimensions in you main project by uniting the inner conductor to the microstrip feed and uniting the ground plane to outer of coaxial cable and run the simulation.
Hope this helps
-Ankesh