Antenna - Theory .com: The Antenna Site

Antenna Basics Antenna Types Smith Charts Antenna Measurements

antenna-theory.com :: View topic - Transmission line conductors separation...
antenna-theory.com Forum Index antenna-theory.com
Antenna Theory
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Transmission line conductors separation...

 
Post new topic   Reply to topic    antenna-theory.com Forum Index -> Questions Related to Antenna Theory
View previous topic :: View next topic  
Author Message
tensor20
Antenna Theory Regular


Joined: 12 Jul 2011
Posts: 18

PostPosted: Tue Jul 12, 2011 12:37 pm    Post subject: Transmission line conductors separation... Reply with quote

Hello Forum,

why does the separation between conductors in a transmission line need to be less than a wavelength?

Would the t-line radiate otherwise?

I have read about the Goubau line (single conductor t-line). if it is completely straight it carries energy with a single conductor without radiating it...

tensor20
Back to top
View user's profile Send private message
bigSteve
Antenna Wizard


Joined: 14 Mar 2009
Posts: 265

PostPosted: Wed Jul 13, 2011 12:20 am    Post subject: Reply with quote

Transmission lines typically have conductors separated much closer than a wavelength. If the conductors are significantly far apart (more than a quarter-wavelength), they will radiate.

I've never heard of the "Goubau line". If it is a single conductor, it is not a transmission line. The characteristics of a transmission line (intrinsic impedance, per length capacitance, etc) are calculated by looking at the fields between the two conductors, so a one conductor line doesn't make sense.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    antenna-theory.com Forum Index -> Questions Related to Antenna Theory All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group