Choose a conductor with as large diameter as you can find and it preferably should be copper (or silver). This is to keep the resistive losses low. The conductor does not have to be solid. I once used some 3/8" Heliax coax for the main loop and had good results. Heliax cable uses...
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The rotating platform, which was about 3m in diameter, contained brushes about every 20 degrees to ensure that it was continuously grounded with the outside ground, an area about 400m2. Figure 3a and 3b. Test range setup conditions. The sense antenna was mounted on a stand that moved in ...