Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Lossless dielectric material

Status
Not open for further replies.
H

hayowazzup

Advanced Member level 4
Joined
Oct 9, 2010
Messages
117
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Activity points
2,136
Questions
1. When we are talking about lossless dielectric, does it mean only the material's conductivity equal to zero, and does it mean anything to its relative permeability and permittivity?

2. Does lossless dielectric mean a vaccum?


Thanks in advance.
 
Last edited:

Think of the loss as an eddy current phase of a wave in a dielectric, not the leakage resistance. ( not technically correct but analogy)

So it impedes flow with a loss factor. It is indicated by the tangent of the loss contant for the material in dB and is a function of material type, thickness, and of course frequency. A vaccum removes the air dielectric. Epoxy/fiberglass in FR4 is ok to VHF but for microwave low loss FR4 is better then, Polyamide then you start getting into temperature sensitive materials like polyurethane, PTFE etc.. Screen shot 2012-05-30 at 1.08.37 PM.PNG

see Wiki for details
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top