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An SWR meter is not the best to adjust antennas. You can even measure 1:1 with very different impedances to 50ohms.With a load of 25ohmios it will indicate a ROE 2:1, BUT ALSO WITH A LOAD OF 100 OHMS WILL ALSO INDICATE 2:1 .. A noise generator is much more accurate and efficient at the same...

An electromagnetic wave consists of energy being transmitted down the transmission line or antenna. This energy is in two forms, an electric field and a magnetic field, which fluctuate constantly, with a continuing exchange between electrical and magnetic energy. In a traveling wave, the...

Matching impedances 6dB loss in a ideal circuit...

No time to study it take?Losses are taken for voltage drop in the antenna to the adapter, transmission lines and transmission equipment itself. Just read a little and learns. It is easy to discredit without any support, also need not go to any library, everything is on the Internet, the only...

I would not cut the antenna.Have a problem of impedance, because the installation is incorrect. The impedance has nothing to do with the antenna resonance.To find out where an antenna resonates, you need a "grid-dip meter", not a SWR meter or a "antenna analyzer". We always try to get 50ohms at...

Matching the impedances isn't particularly efficient: it actually gives a 6dB loss in a ideal circuit. In a REAL WORLD is much more.:whistle: CST whitepaper...

It is obvious that a device that does not need an adapter Gamma-match is more efficient. The gamma-match adapters must avoid if you can not add heat lost by irradiation of an alien parasite to the antenna element is only an adapter. This device adds lost to an antenna. "no see".

If then we will be guided by what marketers say, nobody can deny that effectively Solarcon A99 has 9.9 dBi of gain. What makes the Sigma 4 a giant useless junk.

The Germans invented the j-pole in the early twentieth century. they never said it a radiant 3/4 wave. To say that it is is that the Germans are stupid and know nothing of antennas??. Even manufactured and sold even for VHF, but even as a 5/8 wave, but a simple half-wave. The Germans are...

At last I found some of these antennas for VHF, 2-meter, so I take back that "nobody does"*. The Germans do, but sold as half-wave antenna. :D Winkler CX-2 Sperrtopfantenne (2m)

Anyone here brought an FM antenna to the discussion; that I believe we are talking about the Sigma 4 Sirio Vector 4000. These antennas ever demonstrated in the real world that can overcome a 5/8 as the Penetrator 500. If they were as good as their physical length looks, its use would be...

I have already !! :D

I would argue that the antenna A / P needs a diameter similar to the mast to function properly. Smaller diameters makes more work flows on the mast and not the antenna. It is my humble opinion. :pop: no see.

Yes!! and CST software is so good that you can tell which side melts faster ice cream. I assure you! :D

YES !! :thumbup:

We agree that You are right in words, then I can explain what is the correct side of the antenna? Whose side currents are in phase with the radiating cone. I would like to see that in CST, or if possible, better proprietary software from NASA. NO SEE.

Us agree that we then radiates radio frequency cone??. OK!! But how do we do it in the direction we want?? We put a compass in hand and say: "look, I want to radiate as I will; not like you do"?? The model shows that the cone is in antiphase with the rest of the radiant, so it does not radiate...

As you have only used words. Never ever mathematical proof, not even a model other than that already refute CST animation. You do not have anything more? You will think I am an amateur?? At 16 years old I operated a broadcasting, it was my uncle. At 18, studied electronics, years later took...

SIGMA 4 CONE IRRADIATION BECAUSE GAIN IN CONE IS A FANTASY. Many years ago a radiotecnician colleague told me "had invented putting gain directional antennas to the 4 cardinal points." I said that the gain was apparent, since if an antenna radiating in the sense that he would say, does...

Sigma 4 gain in cone. GAIN ON STAGE IRRADIATION IS CONE IS A FANTASY. Many years ago a radiotecnician colleague told me "had invented putting gain directional antennas to the 4 cardinal points." I said that the gain was apparent, since if an antenna radiating in the sense that he would say...