Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old December 10th 10, 08:40 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Apr 2010
Posts: 484
Default antenna physics question

On Dec 10, 4:12*pm, Art Unwin wrote:
On Dec 10, 8:37*am, joe wrote:



Art Unwin wrote:
*I am sure you also know that only
units used by Mawell represent the path
to maximum efficiency in radiation as well as
the ratio of capacitance to inductance must be
*unity.
Art KB9MZ....xg


Art, You have just mentioned a constraint on antennas that I was not aware
of. *Specifically "the ratio of capacitance to inductance must be unity".


This is new to me. Please tell me how I go about making capacitance and
inductance equal so their ratio can be unity. How do you get the Farads and
Henries to cancel out, leaving a dimensionless number.


Can you give me some real world examples?


joe


I will be happy to do so
Root L/C = 1

This means that L/C both of which are loss contributors are removed
from any formulae
Art


neither L nor C contributes any loss in any kind of circuit analysis i
have ever seen.... its always the R that converts the electrical
energy to heat to remove it from doing something useful besides
heating the room.
  #2   Report Post  
Old December 11th 10, 07:20 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Mar 2008
Posts: 1,339
Default antenna physics question

On Dec 10, 2:40*pm, K1TTT wrote:
On Dec 10, 4:12*pm, Art Unwin wrote:



On Dec 10, 8:37*am, joe wrote:


Art Unwin wrote:
*I am sure you also know that only
units used by Mawell represent the path
to maximum efficiency in radiation as well as
the ratio of capacitance to inductance must be
*unity.
Art KB9MZ....xg


Art, You have just mentioned a constraint on antennas that I was not aware
of. *Specifically "the ratio of capacitance to inductance must be unity".


This is new to me. Please tell me how I go about making capacitance and
inductance equal so their ratio can be unity. How do you get the Farads and
Henries to cancel out, leaving a dimensionless number.


Can you give me some real world examples?


joe


I will be happy to do so
Root L/C = 1


This means that L/C both of which are loss contributors are removed
from any formulae
Art


neither L nor C contributes any loss in any kind of circuit analysis i
have ever seen.... its always the R that converts the electrical
energy to heat to remove it from doing something useful besides
heating the room.


Silly
Impedance consists of resistance Ra and reactance jxx. You can remove
resistance Ra from an element while the reactance constituent can
still remain.
Thus the impedance remains real.
Don't give up your job just yet!
  #3   Report Post  
Old December 11th 10, 07:25 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Apr 2010
Posts: 484
Default antenna physics question

On Dec 11, 7:20*pm, Art Unwin wrote:
On Dec 10, 2:40*pm, K1TTT wrote:



On Dec 10, 4:12*pm, Art Unwin wrote:


On Dec 10, 8:37*am, joe wrote:


Art Unwin wrote:
*I am sure you also know that only
units used by Mawell represent the path
to maximum efficiency in radiation as well as
the ratio of capacitance to inductance must be
*unity.
Art KB9MZ....xg


Art, You have just mentioned a constraint on antennas that I was not aware
of. *Specifically "the ratio of capacitance to inductance must be unity".


This is new to me. Please tell me how I go about making capacitance and
inductance equal so their ratio can be unity. How do you get the Farads and
Henries to cancel out, leaving a dimensionless number.


Can you give me some real world examples?


joe


I will be happy to do so
Root L/C = 1


This means that L/C both of which are loss contributors are removed
from any formulae
Art


neither L nor C contributes any loss in any kind of circuit analysis i
have ever seen.... its always the R that converts the electrical
energy to heat to remove it from doing something useful besides
heating the room.


Silly
Impedance consists of resistance Ra and reactance *jxx. You can remove
resistance Ra from an element while the reactance constituent can
still remain.
*Thus the impedance remains real.
Don't give up your job just yet!


lets see, you remove the resistance which is the 'real' part of the
impedance, which gives you the imaginary reactance part as noted by
the 'j' above, and you think its real... probably just as real as your
pancake antenna in its faraday cage. you never have explained how my
ferromagnetic antenna works without your magical diamagnetic
levitating neutrinos.
Reply
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
Physics forums censor ship Art Unwin Antenna 75 January 14th 10 12:10 AM
sci.physics.electromag NEEDS YOU! Dave Antenna 16 December 14th 07 12:17 PM
Physics according to toad Cmd Buzz Corey Policy 5 May 28th 05 04:57 PM
NY TIMES says new super-small Hammie Antenna defies physics Nicolai Carpathia CB 16 June 12th 04 08:08 PM
Ye canna change the lars o' physics Dave VanHorn CB 5 August 2nd 03 08:34 PM


All times are GMT +1. The time now is 02:37 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