| The loss is primarily due to dielectric loss. When using two coaxial lines, and the shields are grounded, then only 1/2 of the voltage will appear in each line (assuming same VSWR and power), lowering the losses considerably. Thus you must compute the maximum voltages for both situations by calculating the VSWR's with both configurations. If the loss is too high, you can still eliminate the ground completely and use the braiding for conductors and build your open wire line accordingly...this will be an excellent low loss line. |
