Wire antenna?

RE: Wire antenna?

abhiarora — Sat, 04 Nov 2017 16:42:53 GMT

Any update on Wire antenna? I am working on a product where I have to use wire antenna.

RE: Wire antenna?

Dave_couling — Mon, 29 Feb 2016 19:42:44 GMT

For prototyping it might be easier for tuning. With a PCB antenna you need to test/tune and re-spin the board. Chip Antenna's are very sensitive in how they are applied and tuned. So for prototyping, in your case a wire antenna might be ideal.

RE: Wire antenna?

Luis — Mon, 29 Feb 2016 19:40:07 GMT

Sure it increases Z size, if wire is 1/4 of 2.45GHz wavelength, I found this dimension is 30.6 mm aprox, so 3 cm. In my particular case (which I understand is not very common) I don't mind using that extra size. I am worried about losing RF range, power, omnidirectional emission, etc. Will it be harder to tune the antena matching circuit? In my application (RC drone), omnidirectional efficiency is very important, because I want to have very similar RF range, no matter how the drone is rotated in every axis... so do you think the wire is better or worse than chip or pcb antenas for these matters? BTW tahnk you very much for your help. :)

RE: Wire antenna?

Dave_couling — Mon, 29 Feb 2016 19:19:21 GMT

Though you reduce the PCB area (X-Y), you have a considerable Z component to your design. So the downside is definitely an increase to your product size.

RE: Wire antenna?

Luis — Mon, 29 Feb 2016 13:45:59 GMT

Could anyone else give some advise about this? Has anyone tried it? Should I expect any benefit apart from pcb area reduction or the idea only has downsides?

RE: Wire antenna?

Dave_couling — Mon, 15 Feb 2016 19:32:37 GMT

Yes the length of the wire. You are basically creating your own stubby antenna, without the casing.

1/4 of 2.45GHz, would be the maximum transmission length. Less or More degrades the amount of signal that will actually reach the air.

RE: Wire antenna?

Luis — Mon, 15 Feb 2016 19:07:18 GMT

Thank you Dave. By 1/4 wavelength you mean the length of the straigth wire, or that it should have geometry like waves, as some pcb antennas are? If you meant length, any guess what is the length of a 1/4 wavelength at 2.4Ghz? And why 1/4? Does it get better if I increase/decrease it? Sure I am also planing to use matching circuit. Let's see if somebody knows downsides or why no one is doing this.

RE: Wire antenna?

Dave_couling — Mon, 15 Feb 2016 19:01:44 GMT

In a hacky way you could cut a piece of wire to ~ a 1/4 wavelength and solder it to the board. You will likely still need a matching circuit, but in theory this should work.