Question about open/short

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 .

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

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

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..

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.

thanks atul_microwaves_antenna and Abhishekabs