Respected researchers, if you have experience to design microstrip patch antenna design, please send your review on different materials to be used for substrate to get maximum bandwidth or gain? Also tell cost of these materials.
Hello Shally madam,
If your Dielectric constant is high (like using FR 4, dielectric constant 4.4) then Bandwidth will increase, but gain will be low. If you reduce the dielectric contant (using RT duroid, dielectric constant 2.2 ) then the gain will increase but operating band become narrower. So you have to optimize your design according to that.
There is also many other dielectric materials too.
And regarding Cost issues. Rogers RT-duroid 5880 is so much costly than FR 4-Epoxy. While 1x1 Sq. ft FR4 material costs around 700-1000, RT duroid will cost more than 20K. (given prices are all approx.).
So, for cost effective way FR4 is good but there is much dielectric loss in this material. You have to modify your design according to that.
I hope it will help.
Thank You very much.
Best Regards
Anik Ghosh
PhD Scholar
Dept. of EEE, IITG
Thanks Anik sir for proper explanation of my question. Sir I often seen papers with FR-4 and RT duroid material. Which other materials can be used for purpose? There is no information on this point in any paper.
Madam,
There are so many options for dielectric material.
If you are using HFSS, while you are assigning material, there you get so many options. Except duroid and FR4, commonly used dielectric materials are taconic, Ro 4003 etc. For low frequency it is very much suitable to use FR4 material.
But, it is better to use as per the material availability in your laboratory or practical purpose.
Otherwise you have to import those PCB with high cost if you use anything for your antenna design.
Thank you very much.
Best regards
Anik Ghosh
PhD Scholar,
Dept. of EEE, IITG
You can try according to design requirements and final goal/objective
And cost effectiveness or constraints
Like wise for example FR4 readily available low cost but highly lossy
Compared to PTFE or Rogers
Use low dielectric constant material for high gain
Use high dielectric constant material for large bandwidth
Thanks Ashwini sir for your ideas. I will apply same for designing antenna.
Regards
Shally
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