microstrip antenna using FR4 substrate with 1.588 thickness

[sameerccs11]

hello
i m sameer.actually i want to design a microstrip antenna using FR4 and thickness 1.588.but my requirement is both the efficiency should be more than 80%, gain and directivity should be more than 6 dbi.i have designed normal planer antenna but i m not getting my requirement.so plz somebody help me in getting efficiency more than 80%, gain and directivuty more than 6 dbi. on FR4 with h= 1.588.
i will be very very thankful to you.

regards sameer

 

[streamlet]

It would be a big challenge to realize radiation efficiency higher than 80% on FR4. According to my experience, even on good substrates like RT/duroid 5880, the radiation efficiency achieved in practice is just between 80~90%.

 

[ferdows]

hi
for high efficiency choose of good substrate is one of techniques but by use of some reflectors in antenna u can design and achieve high efficiency and stack and other structure like this can help too much

 

[waqas jaan]

what will be the thickness of the substrate if the operating frequency is 10GHz ????? as i am looking for the thickness of FR-4 substrate at operating frequency of 10GHz. please is there any method to find the the thickness of the different substrate.