LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #39   Report Post  
Old July 12th 08, 03:01 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Mar 2008
Posts: 1,339
Default Part of Too Many

On Jul 11, 11:57 pm, (Richard Harrison)
wrote:
Art wrote:

"Of course you can show your academic ability in telling the group WHY
it "cannot possibly work" or wait for another expert to state "why" to
save face."

No one is saving face or conspiring against a new idea. You can`t break
the laws of physics no matter how hard you try.

Antenna performance is based on lengths of wire in the air and the
currents in them. Take a broadside array for example. It is usual to
drive current through all the elements of a plane in the same phase so
that the fields at a distant point perpendicular to the plane of the
array are additive to make a large signal. It is a matter of radiator
lengths and currents.

Now consider a small diameter coil as a radiator. It is called an radial
mode helix because radiation is radial (perpendicular to the axis of the
coil). It has two extremes. If collapsed, the coil becomes a single
loop. If stretched to its maximum, the coil becomes a straight wire. If
controlled so that the same magnitude and direction of current flows in
all configurations, the straight-wire version of this coil should
produce the greatest radiated field strength perpendicular to the coil
axis in the far field.

Best regards, Richard Harrison, KB5WZI


I don't know where you get this straight busines from. the wire will
radiate
no matter what shape as long as it is in equilibrium which means
straight or otherwise.
No law says it must be straight or else unless you can show it to me.
The helix is not straight! Making a helix a full wave circuit gets rid
of the counterpoise,
it does not stop radiation. Kraus suggests that a helix can supply a
16 db gain which is very high
but tnever the less gain can be achieved. So I do not see the point
that you are silently dwelling aponto justufy that it can,t work as
well as
radiators MUSt be at right angles to the earths surface for maximum
vertical gain. You have never explained the u nderpinnings of your
statements in academic form without which there is nothing I can
debate with you
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
part 13 [email protected] Policy 0 June 15th 07 01:36 AM
Where does part 97 end and part 15 begin? [email protected] Homebrew 64 February 23rd 07 03:08 AM
Where does part 97 end and part 15 begin? John Smith I Policy 1 January 27th 07 06:04 AM
WTB Zenith part/part radio Alfred Carlson Swap 0 January 23rd 04 12:29 AM
WTB Transoceanic Part/Part radio Alfred Carlson Boatanchors 0 January 23rd 04 12:27 AM


All times are GMT +1. The time now is 08:24 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017