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Raphael, I don't know.....I'm not smart enough to find "holes" in the numerical electromagnetics code.? I do know that there is no equation for any particular antenna configuration in the

Dan, I think it is a doubtful conclusion, let's for sake of argument forget about any software simulations apps. The loop in short mode current is closed with about 3 ohms load resistor and the

Raphael Wasserman <wassermanr46@...> added the photo album Short Current Mode of Small Loop Antenna ( /g/loopantennas/album?id=298122 ) : Chavdar Levkov's published

I don't think this supposition is correct.? In simulation of a short-circuited loop with ZERO ohmic resistance, we see that flat frequency response.? In my simple country engineer way of looking at

Done.? See folder HERE ( /g/loopantennas/files/One-meter%20circular%20loop%20excited%20by%20plane-wave ).

Dave, This is a known difference between a magnetic antenna and electric antenna. Raphael

Hi Chavdar, What bothers me in your published article https://www.lz1aq.signacor.com/docs/fa-eng/Weak_ ( https://www.lz.signacor.com/docs/fa-eng/Weak ) signals-mag_loop_engl.htm where using known

And yet another interesting result: Look at below and above resonance. With a dipole of 1/4-wavelength monopole when its short (physically) it's capacitove. When long, it's inductive. Just the

If anyone is interested I have a few unpopulated LZ1AQ boards, that take all leaded parts and 2N2222 transistors. If interested please contact me off list at everettsharp (at) aol com. ?Everett N4CY

All, The mentioned here Chavdar's webpage represents correct equivalent model of small loop antenna that should be used in order to come up with a dummy aerial for loop antenna. Raphael

Dan, could you please share your EZNEC file? Regards Fred

Should have said, that particular data was for a 36 segment, 1 meter diameter loop, zero conductor resistivity, 25.4mm diameter conductor, excited by a 1V/meter plane wave into a 1 MEG load.?

Mark, I got the same sort of result....using either NEC4.2 or NEC5 engines....flat current vs. frequency response into a short-circuit.? On the other hand, with an open-circuit (i.e. 1 MEGohm) load,

Excellent Mark, Thank you for your efforts. The simulation result sheds light into the issue. regards, Fred

Hi Mike, A dummy (& test procedure) for testing the common mode rejection already exists in IEC315-1, Fig. 7. The original IEC standard is behind a paywall, but a nearly identical Indian standard is

Hi Chavadar, I ran a simple loop model in EZNEC Pro+ version 7.0. The simulated loop is an octagon with dimensions that approximate a one meter diameter circular loop. Conductor diameter is 3.3 mm.

OK, I understand the various constraints, and I appreciate everyone's input. Now that winter is approaching, I'd prefer to be inside the workshop, in the warm and dry, rather than fiddling with loop

To Raphael, The Thevenin and Norton representation of 2 pole circuit will give the same result and using one of them is a matter to simplify the calculations and measurements. For wideband short

Martin, I can understand that Levkov's proposed and used by him designed "dummy" aerial cicuit? ?addresses only the frequency region where it is observed short circuit mode by placing the inductor

Martin, The shortcut of that is the loop works in a short circuit mode when Ra=Xa, where Xa=2x pi x f x La. That represents narrowed bandwidth, it is good for LVF and LF just for that