All Questions
Tagged with loop-antenna magnetic-loop
9 questions
-1
votes
1
answer
81
views
What size is the loop antenna for 12.288 MHz?
I would like to know, what the size is for loop antenna driven with 12.288 MHz. I researched many pages on internet, but I want to know just the calculation which is being performed. Below a picture ...
- 115
0
votes
1
answer
99
views
Optimal antenna configuration for edge-on power transfer
I need to build a MHz antenna that can power an RFID chip that responds to mag field perpendicular to the plane of a loop antenna, e.g, using STL transmitter with a small receiver loop in same plane ...
- 113
1
vote
0
answers
298
views
What is the differece between a large loop antenna and a small loop antenna in terms of their response to an electromagnetic wave?
There is something that I don't get. I read that a small loop antenna (also called magnetic loop) responds more to the magnetic field than a large loop antenna does. I was wondering why this is the ...
- 81
7
votes
1
answer
387
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How does a Large Loop Antenna work physically?
I am learning about loop antennas at the moment. I read that the response of a small loop Antenna is proportional to the rate of change of magnetic flux through the loop which causes a uniform current ...
- 81
4
votes
1
answer
965
views
Debugging SM0VPO's spiral loop antenna build
I had built SM0VPO's spiral loop antenna. And here it is.
Recently I got myself a NanoVNA to see how finnicky it is to be tuned with that poor man's tuning cap. I brought it from 12 MHz into the 14 ...
- 415
1
vote
2
answers
664
views
Loop Antenna Construction
I have a loop antenna.
When I connect the probe from my oscilloscope, does the probe also act as an antenna? If so, how should I fix that? I read about feeding technique, but I still do not ...
- 129
2
votes
2
answers
2k
views
Is a balun really necessary for a small loop antenna?
I am in the process of designing a small receiving loop antenna for the lower HF bands. By small I mean a circumference of less than $0.2\lambda$. Thus, a uniform current distribution can rightly be ...
- 121
9
votes
4
answers
2k
views
Why are there differences in antennas that depend on electrical component and magnetic component of a radio wave?
I understand the idea that when we are targeting the electrical component of the radio waves we need to have some form of a linear conductor that receives the electrical component, this creates a ...
- 169
3
votes
3
answers
2k
views
How do active loop vs. passive loop differ in terms of noise rejection?
As a urban ham (Harvard Square, Cambridge MA), I'm on the hunt for RFI rejecting antenna configurations. After hours of research, I've come across many strong recommendations for loop antennas, since ...
- 285