Tight or Loose Coupling in Directional Couplers

Status
Not open for further replies.
M

moreho

Member level 1
Joined
Dec 8, 2008
Messages
41
Helped
2
Reputation
4
Reaction score
1
Trophy points
1,288
Visit site
Activity points
1,561
Hi my Friends

what means Tight or Loose Coupling in Directional Couplers?
is it try to clarify the Nominal Coupling Factor (ie. 3 to 20 dB as Tight and above 20dB as Loose)
or it try to clarify the Frequency Sensitivity (Ripple) in the Bandwidth?

Thanks in Advance
 

It is referring to the nominal coupling factor, but is not a precise term i.e. no hard line at 20dB.
 
Reactions: moreho

    M

    moreho

    Points: 2
    Helpful Answer Positive Rating
Tight and loose couplings refer to the value of the coupling level between coupled ports or coupled lines.
For example if you want to design a tandem coupler you need two pairs of coupled lines with coupling level of -8.34 dB. Then -6 dB is tighter and -10 dB is looser than -8.34 dB.
 
Reactions: moreho

    M

    moreho

    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…