hi, i have no idea of fabricating antenna. if i have substrat, SMA then how can i fabricate a planar antenna ? that is how can i made copper pattern printing on substrate? i have no factories around me that can fabricate antenna so i want to fabricate it for myself.
secondly for measurements i need to buy far filed probes OF MY WORKING FREQUENCY for VNA?
At L-Band? Those aren't going to be cheap. Hope you have a sizeable budget. You also won't get a very accurate result without some type of absorber. Remember that at L-band, the far-field distance is fairly large.