TerryADS
Full Member level 2
Hi friends,
I want to measure the impedence of antenna. I did the VNA calibration of semi-rigid cable(30KHz~6GHz),and then directly measure the impedence of antenna,i get 128+j*60(VNA calibration port external still setn),but when i set the center frequncy (1.921GHz)and span(1GHz),i find i get another impedance,as 23+j*60.
My question is when i finish semi-rigid cable calibration,whether i can set the port external set off,and whether i can re-set the center frequecy and span?Anyone share me your experience what is wrong procedure after calibration and before measure?
Thanks
I want to measure the impedence of antenna. I did the VNA calibration of semi-rigid cable(30KHz~6GHz),and then directly measure the impedence of antenna,i get 128+j*60(VNA calibration port external still setn),but when i set the center frequncy (1.921GHz)and span(1GHz),i find i get another impedance,as 23+j*60.
My question is when i finish semi-rigid cable calibration,whether i can set the port external set off,and whether i can re-set the center frequecy and span?Anyone share me your experience what is wrong procedure after calibration and before measure?
Thanks