VSWR – voltage standing wave ratio, it defines the transmission line (Generator-Load) matching degree, and is determined by the following equation:

 

 

VSWR=

, where

 

U_max - maximum standing wave voltage value in transmission line;

U_min - maximum standing wave voltage value in transmission line;

Ins Lloss - direct loss, dB, defines high frequency power losses in transmission line (device), the level absorbed by device and determined by the equation:

 

Ins Loss =10lg

Pin Pout

, where

 

 

P_in - device input power;

P_out - device output power at its operating in circuit-closing connection.

 

Isol (a times) dB - reverse loss (for isolators), isolation (for circulators), defines the generator (high frequency power source) safety degree from the load reflected signal, and is determined by the equation:

 

Isol (a times)=10lg

Pin Pout

, where

 

P_in - device input power;

P_out - device output power at reverse device circuit-closing connection for isolators;, and

P_out - power level in the channel 3 for circulators with the high frequency power spreading in the heating of channels 1® 2®3.

All mentioned parameters are controlled with panoramic automatic VSWR and attenuation meters under the standards developed according to MEC recommendations.