Measuring radiation efficiency of antenna with different dielectric constant

Status
Not open for further replies.
N

nvt088

Member level 4
Joined
Dec 24, 2013
Messages
79
Helped
10
Reputation
20
Reaction score
10
Trophy points
8
Location
Jupiter
Visit site
Activity points
509
Hi every one.

I want to make an experiment about impact of dielectric constant on embedded antenna.

I design a loop, put it into an insulator block, surrounded by a lossy liquid. Fix size of this lossy liquid

When I change dielectric constant of insulator, I need to change size of antenna to have the same resonant frequency.

Is this meaningful if I compare radiation efficiency of antenna with different sizes? And can I conclude that Some dielectric constant can give a high radiation efficiency?

Many thanks
 

Should be fine to compare antennas with slightly different sizes if they resonate on the same frequency (size changed due to different Er).
Usually, lower the dielectric constant between ground and the radiating element, higher the antenna gain.
 
Reactions: nvt088

    N

    nvt088

    Points: 2
    Helpful Answer Positive Rating
vfone said:
Should be fine to compare antennas with slightly different sizes if they resonate on the same frequency (size changed due to different Er).
Usually, lower the dielectric constant between ground and the radiating element, higher the antenna gain.
Click to expand...

Thank you for your answer.

But I want to change dielectric constant of insulator from 1 to 50, so Size of my loop antenna changes dramatically.

I just want to evaluate impact of dielectric constant on my loop antenna, inside a lossy liquid.

Is there any reliable way to do that? Because I think that when size of antenna is different, efficiency comparison is unfair.

Many thanks
 

If the antenna aperture (size) is totally different you cannot compare two antennas in terms of efficiency.
I think better is to not compare the antennas, and just check if the efficiency of the antenna inside of the liquid meets your requirements.
Anyway, an antenna inside of a liquid will never work like an antenna in free air.
 
Reactions: nvt088

    N

    nvt088

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…