Home |
Search |
Today's Posts |
|
#1
|
|||
|
|||
Picturing the radiation?
gareth wrote:
On antennae that are several half-wavelengths long (beverage, Rhombic, etc) what does the radiative wavefront look like when close to the antennae, even though it is presented in the literature as a plane wave further out? Run just about any version of NEC and look at the near field data and find out. The reason that I ask is the on such longwires, there are parts of the wire which will be radiating positively, and parts negatively, thereby suggesting that the outgoing wave, spherical though it might be, has a +/- modualtion were you to travrse its circumference? Are you attempting to say the pattern has lobes in as many words as possible? Shape of the wavefront tells you little about the workings of an antenna as an antenna as it depends on things like the emitter area and distance from the emitter. Example: Sunlight from the Sun has a spherical wavefront, but at the Earth's distance of 150,000,000 kilometers you are hard pressed to measure the difference from planar. -- Jim Pennino |
#2
|
|||
|
|||
Picturing the radiation?
|
#3
|
|||
|
|||
Picturing the radiation?
"Brian Reay" wrote in message
... If you follow his 'theory' through, try applying it to light (which follows the same laws of physics). Basically, he is confused. Once again, Brian,the origination of abuse comes from you. |
#4
|
|||
|
|||
Picturing the radiation?
On Wednesday, October 15, 2014 4:18:22 AM UTC-5, gareth wrote:
"Brian Reay" wrote in message ... If you follow his 'theory' through, try applying it to light (which follows the same laws of physics). Basically, he is confused. Once again, Brian,the origination of abuse comes from you. Who cares.. This is not some silly abuse encounter group.. :/ Did you do what was suggested and run it through a program? That will totally answer your question and you can see it visually. You can download this program, and there are already beverage ant files ready to go. Even a caveman could do it. It's free, and good nuff for gov work. And it will handle a lot of segments for the more complex antennas. The beverages are under the "receive" antenna folder.. http://hamsoft.ca/pages/mmana-gal.php |
#5
|
|||
|
|||
Picturing the radiation?
wrote in message
... This is not some silly abuse encounter group.. No? ... Did you do what was suggested and run it through a program? Even a caveman could do it. .... and now, yes? |
#6
|
|||
|
|||
Picturing the radiation?
On Wednesday, October 15, 2014 4:36:06 AM UTC-5, gareth wrote:
wrote in message ... This is not some silly abuse encounter group.. No? ... Did you do what was suggested and run it through a program? Even a caveman could do it. ... and now, yes? Well, I guess you know the answer to your question now. Yes? |
#7
|
|||
|
|||
Picturing the radiation?
|
#8
|
|||
|
|||
Picturing the radiation?
On Wednesday, October 15, 2014 12:20:12 PM UTC-5, Brian Reay wrote:
It is really best not to respond to him directly, you will notice I never do. If you ignore him, he eventually 'blows his top' and goes off to sulk. No worries. I enjoy toying with these types. It's good wholesome fun for the whole family. I'm pretty much convinced he's one of Art Unwin's long lost UK relatives. :| Their tactics and brand of bafflegab are quite similar. |
#9
|
|||
|
|||
Picturing the radiation?
|
#10
|
|||
|
|||
Picturing the radiation?
"Brian Reay" wrote in message
... You need to appreciate that Gareth considers anyone who corrects him as being abusive. Untrue, but you take every opportunity to be abusive to me, as above. Having seen him in action many, many times, I can assure you this is so and point you are countless examples in the uk.r.a and other newsgroup archives. Untrue. He invariably uses a similar technique and ends up using the same abusive terms (eg 'Silly Boy'). Untrue. He has been doing this for well over a decade, he was using the same techniques before I started using uk.r.a in around 2000. Untrue. It is really best not to respond to him directly, you will notice I never do. If you ignore him, he eventually 'blows his top' and goes off to sulk. Untrue. |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Polarized radiation | Antenna | |||
Electromagnetic Radiation | General | |||
Angle of Radiation | Antenna | |||
Electromagnetic radiation | Shortwave | |||
Radiation from wire | Antenna |