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Yep, all the lines were already modelled, was just missing a data element of the coil to complete the whole thing. Pyramids would have been the best choice if size wasn't an issue, that's right. Anyway, turns out a simple quarter wavelength line has much more broadband capabilities than any coil...
Thank you all for your responses, it is now clear there are numerous problems concerning even the reliability of the measurement, as well as the performance of the coil itself and its representation. I have decided not to bother using it anymore and replaced it with a λ/4 stripline to prevent...
It is rather clear why it's been measured with a short to the ground, as this particular configuration fits most of the applications. The problem is though, I won't be using it in its conventional configuration. Rather than decoupling the DC, I will be using it as a bias tee replacement and will...
Hi all,
As easy as it may seem, I am having trouble trying to convert S-parameters of a two-port network between two basic configurations which I believe should be a trivial operation. I have been provided the S-parameters of a passive two-port device (an RF choke coil to be precise) which is...
Hi,
As for the first, the reflections have strong dependency on the size of the box. And of course it also depends on the wavelength, thus I rather prefer to look for a broadband solution. Generally speaking, the result I expect would be such that there should be much less change in the...
Thank you for your reply,
Sadly though I'd already tried using the boundary itself as a ground plane but unfortunately it turned out to be even more problematic. The main problem with such perfect E-field boundary is that I cannot get rid of phase differences along the plane of the boundary...
Hi all,
I'm trying to model a rather ripped coax cable which has a particular region of 10mm in the middle, where the outer conductor is stripped off. In reality, both ends of the cable would be connected to the ports of a network analyser so that they'd have a single reference ground. Yet in...
I was just wondering as I've seen this public demonstration done by Eric Giler, where a TV set was powered by those coils. I personally wouldn't be so comfortable with sitting through the backs of that auditorium where the radiating zone could kick in.
I have to bump the thread as something is bothering me about this so-called near field concept. Physically speaking, one inserts let's say about 10 kW (70dBm) of RF power at 7 MHz into the transmitting coil. Then I have to say I'm somewhat concerned about the far-field effects of such a system...
Thank you very much all, now I get a more clear picture considering all the effort of people trying to achieve more and more compact and low profile designs. I see that excess square feet of radiating element area is simply unacceptable :D
I see. Still, would two of the antennas (Antenna1 & 2) I described have the same figure of merit? After all, compensating the mismatch with higher directivity now doesn't seem a bad idea, which surprises me.
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