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.

Properties of human muscle and Saline solution

farshaddd

Newbie level 5
Joined
Jun 7, 2021
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
78
Hello Everyone.
I have found the following properties for human muscle tissue:
Electrical Conductivity (σ): 0.58 S/m
Relative permittivity (εr): 136
Loss tangent (tan(δ)): 6
But the problem is that the softwares such as COMSOL Multiphysics need relative permeability (μr) to model the material.
Is there a way or formula to calculate μr from the given εr, σ and tan(δ) ?
or does anybody know about a reference table for relative permeability (μr) of muscle or Saline?
Thanks a lot.
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
48,519
Helped
14,272
Reputation
28,807
Reaction score
12,976
Trophy points
1,393
Location
Bochum, Germany
Activity points
280,609
There's a strong frequency dependence of saline solution complex permittivity which can't be reflected by just two or three constant numbers. What's the frequency of interest?
 

farshaddd

Newbie level 5
Joined
Jun 7, 2021
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
78
There's a strong frequency dependence of saline solution complex permittivity which can't be reflected by just two or three constant numbers. What's the frequency of interest?
I have two frequencies: 6.78 MHz and 13.56 MHz that are important for me.
 

Azulykit

Advanced Member level 4
Joined
Feb 18, 2007
Messages
1,125
Helped
219
Reputation
436
Reaction score
112
Trophy points
1,343
Location
All over the Map.
Activity points
8,444
The frequencies you cite have very long wavelengths and thus your analysis of results in the context of "antenna" performance is suspect. Painting with a broad brush antenna sizes are typically a few wavelengths and objects being studied are many wavelengths apart. A rule of thumb is that wavelength in meters is equal to 300 divided by frequency in MHz. The root of this conversation is that frequency times wavelength is the speed of light.

My caution is that since the largest mass of human muscle is much smaller than the wavelengths of interest you should be cautious to make sure that your analysis does not take you out of the "range of validity" or your analysis model.
 

LaTeX Commands Quick-Menu:

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top