Question about open/short

[naer]

hello everyone,I am newer in RF,Could anyone tell me the specific feature of open&short used in calibratrue. if i want to buy, which parameters I must supply to the manufacturer? thanks .

 

[Abhishekabs]

Open mean you have infinite impedance, high voltage & zero current.
And Short means high current,zero voltage & zero resistance.
(Ideally)
This are two extreme conditions used to caliberate.
this concept is used in smith chart.

Abhishekabs

 

[naer]

thanks Abhishekabs, what I want to know is how to describle the open/short,such as S11,include phase and amplitude.

 

[atul_microwaves_antenna]

It is simple....u need to calculate the phase on the basis of reflection coeff for the above two cases.
e.g for open ckt...Zl is infinite ...so reflection coeff=1 phase zero...
for short ckt it is -1. So phase is 180 shifted for reflected wave....
Absolute magnitude for both cases is 1 only...phase u need to mention...phase in exponential form...
same is the procedure for other cases where load is reactive or resistive etc..

 

[Abhishekabs]

If it is possible for you to get Book by Terman. " Radio engineering", look in to that book.
he has explained this concept in detail with figures.
This is old book so you can get in Library.

 

[naer]

thanks atul_microwaves_antenna and Abhishekabs