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"The technique of studying a antenna by itself is to place is in free space, with no other object in its field in any direction whatsoever". This study is absolutely wrong. We are subjected to terrestrial magnetism, masts and antennas used, usually metal connected electrically to them, we...

why not use a piece of PVC PIPE ??? :blink: just put a vertical pole..:whistle: :blush:

l dipole antenna is much more appropriate gain in their angles, rather than the best vertical antenna CB. It's more 5dBi at 40 foot with vertical polarization. greetings.

Well I think that is a coaxial antenna ASTROPLANE with a top hat to increase the gain horizontally. Extra capacitances top hat and skirt, help it to gain. No more :wink:

SBE CONSOLE VI

Can you use the Z-zip which is free to use. 7-Zip good luck and good models :blush: PD: I experimented with other models there, too curious l gain of a L dipole about 40 feet :whistle:

were my first 4nec2 designs. :p The model is made with perfect earth.

I use Winrar to create the files. They are compressed, but you must use a type ZIP decompressor. And 4NEC2 luck :thumbup1:

The antenna zeppelin ( j-pole now ) was invented a century ago. The balloon gunners used to telegraph enemy data.<can not stand it> "Radios" were motor generators without valves.^^ ab v c^^ http://en.wikipedia.org/wiki/J-pole_antenna The slim-jim antenna has a higher resistance of...

:tongue: marconi, I also experienced, recently I started modeling with 4nec2 I really like its about EZNEC models but do not understand the software. Here shipping two models perform on a mast 12 meters, a groundplane (monopole?) with planes and 5/8 with planes 1/4. They are modeled...

:redface:

:laugh::laugh::laugh: :thumbup:

thank you very much Marconi. Its plot is interesting, but the real-world antenna often will be much different if the model ignores the feedline and mast?? :confused1: nosepc.

Well, then you can show me that good or design diagrams antennas and irradiation at 40 feet? thank you!

I think the best is to put the L-shaped dipole. good luck.

Then any piece of wire works well?? The best antenna is fiction? nosepc = notpc (my normal language is Spanish)

Because using powers above 12 watts?? :unsure:

I took the trouble to make an antenna 5/8 wave like "A VERTICAL ANTENNA BEST CB "with the program 4nec2, 12 meters high, with its own MAST, (absent in all the "patterns" of sellers) Shows that these antennas have a 18dbi NEGATIVE lobe between 5 and 15 degrees above the horizon, Makes these...

If you start playing with a groundplane antenna to optimize the maximum with 4NEC2 ... The result is one TOP ONE .... ;)

ASTROPLANE .NEC :bdh: I am convinced that the antenna support astroplane greatly influences the performance of the same.Surely the bulk of the mast diameter produces losses in the antenna.You need to make the antenna astroplane the same diameter or thicker to radiate efficiently :bdh: :bdh: