Monday at 1:08 PM #1 S senmeis Full Member level 3 Joined Nov 26, 2014 Messages 168 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 2,531 Hi, an antenna looks like a circular steel ring. Is it an antenna measuring magnetic field?
Monday at 2:02 PM #2 V volker@muehlhaus Advanced Member level 6 Joined Apr 11, 2014 Messages 3,308 Helped 1,083 Reputation 2,170 Reaction score 1,157 Trophy points 1,393 Activity points 20,936 Something like this? https://upload.wikimedia.org/wikipedia/commons/4/49/Schwarzbeck_HFRAE_5161.jpg Yes, this senses the magnetic field. Such loops plus capacitor are also used as narrow band receive & transmit antennas ("magnetic loop antenna"). Upvote 0 Downvote
Something like this? https://upload.wikimedia.org/wikipedia/commons/4/49/Schwarzbeck_HFRAE_5161.jpg Yes, this senses the magnetic field. Such loops plus capacitor are also used as narrow band receive & transmit antennas ("magnetic loop antenna").
Monday at 5:41 PM #3 V vfone Advanced Member level 6 Joined Oct 10, 2001 Messages 5,753 Helped 1,622 Reputation 3,249 Reaction score 1,258 Trophy points 1,393 Activity points 36,532 Instead of using steel any other conductive metal could be used (copper, silver, gold, etc.). The metal used to build the loop don't need to have magnetic properties, but only to be a good electricity conductor. Upvote 0 Downvote
Instead of using steel any other conductive metal could be used (copper, silver, gold, etc.). The metal used to build the loop don't need to have magnetic properties, but only to be a good electricity conductor.
Monday at 9:47 PM #4 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 53,027 Helped 14,788 Reputation 29,863 Reaction score 14,266 Trophy points 1,393 Location Bochum, Germany Activity points 300,708 The outer "ring" is a shield for the inner loop, some models have multiple turns. Material is nickel plated brass rather than steel. Upvote 0 Downvote
The outer "ring" is a shield for the inner loop, some models have multiple turns. Material is nickel plated brass rather than steel.