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Antenna should be Single-sided or double-sided??

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Sherry1

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Can anyone please guide me whether I should prefer single sided or double sided PCB design when designing an antenna on flexible substrate and for wearable purpose?
Is there any advantage in terms of radiation pattern? ( i am looking for omni-directional pattern)
 

Re: Antenna should be Single-sided or double-sided?

i have this problem too
 

Re: Antenna should be Single-sided or double-sided?

Well.. with double sided the thickness between radiator and GND will matter a lot.. this helps in bandwidth enhancement.. the advantage of single sided is ease of fabrication especially for flexible substrates, it will help you avoid the misplacing of the radiator (top side) over the GND (back side), cuz you are not going to use PCB machines any more when using flexible substrates such cloth.. the principle of GND is a reflector.. when simulating full GND microstrip antenna we put Et=0, means eliminating radiation to -ve Z direction => most of the pattern is in +ve Z.. search more on Coplanar monopole

Hope this helps
 
Re: Antenna should be Single-sided or double-sided?

Nothing's been said about antenna type yet...
 

Re: Antenna should be Single-sided or double-sided?

Of course the antenna type is very important in this regards.
A patch or a planar inverted-F antenna definitely needs a ground plane, when a printed dipole don't need any ground plane.
 

Re: Antenna should be Single-sided or double-sided?

,,,can be double-plated PCB... 6pcb_01.jpg

,,, no separate reflectors...!!!
 

Re: Antenna should be Single-sided or double-sided?

and if its a wearable antenna, then the radiation pattern is going to be far from omni-directional

Dave
 

Re: Antenna should be Single-sided or double-sided?

davenn said:
and if its a wearable antenna, then the radiation pattern is going to be far from omni-directional

Dave
Click to expand...

You can give a few pictures ...?
 

Re: Antenna should be Single-sided or double-sided?

fiwi said:
You can give a few pictures ...?
Click to expand...

of what ? what dont you understand ?

if the antenna is on the body or within the clothing, the radiation pattern will be considerably distorted by the presence of the body

Dave
 

Re: Antenna should be Single-sided or double-sided?

,,, perhaps you mean that ...embroidered_antenna_72dpi.jpg
 

Re: Antenna should be Single-sided or double-sided?

since plated thru holes are a PIA and u need a bunch of them...I would try very hard to NOT have metal antenna conductors on both sides of a flexible pcb. I would do it only if three was high power involved, or the metal thickness was so thin that there was too much antenna loss.
 
Re: Antenna should be Single-sided or double-sided?

I want to design antenna for a wearable device . The substrate being used is flexible with very thin substrate ( 0.1mm or 4 mils )
The antenna type under consideration is Printed inverted F shape.

I thought on single sided the Ground plane can be on same side with rest of pattern. right? But with some compromise as suggested in above posts...

Can you all kindly guide in this regard?
 

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