Originally Posted by markus123456
Thats what I do. The material beind the reflector does not have influence. So basically what counts is the copper cladded surface of that PCB and as such it's a very good reflector due to the fact it's copper. Any well conducting material would work though.
Is there much loss if I reverse the single-sided pcb so that the copper side is away from the helix? I was thinking the I could use the thickness of the pcb to produce a uniform gap between reflector and feed point in the first quarter turn.