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WIRE TRACE AS ANTENNA - HEATING UP

 
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HAMPSHIRE185
Antenna-Theory.com Newbie


Joined: 26 Sep 2011
Posts: 1

PostPosted: Mon Sep 26, 2011 8:03 pm    Post subject: WIRE TRACE AS ANTENNA - HEATING UP Reply with quote

Hi all,

I always think it's cheeky when people duck into specialist forums and start asking questions but today it's my turn so I apologise for that! Embarassed

My question is, if I wanted to 'gently warm' a wire/PWB trace, could I do this wirelessly if I made the trace a receiving antenna?

I've got a 50R signal generator (up to 3GHz), if I impedance match the trace will it get warm?

So if I had say a 10cm long track on a PCB, could I get it warm by transmitting power on a certain frequency if I built in 50R's of impedance to the trace? (the trace is not connected to any other components - until I add some for the impedance matching). The PCB will not be powered in any way, I just want to make the trace warm without touching it. I could potentially add a pattern to one end of the trace to act like an antenna (i've seen some called 'F' antennas which might be the same kinda thing.

As you may have gathered, RF and antenna's are not my area of expertise.

ADVthanksANCE
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bigSteve
Antenna Wizard


Joined: 14 Mar 2009
Posts: 265

PostPosted: Wed Sep 28, 2011 1:29 pm    Post subject: Reply with quote

I don't think so.

The antenna radiates away the energy. Heat comes from resistive losses within a conductor. So you don't want an antenna, you want something with an impedance about 50 Ohms that doesn't radiate at all.
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