PART C: REQUIREMENTS
1. The principal antennas used in direction finding are the loop (Figure 2-5), crossed loop
(Figure 2-6), Adcock (Figure 2-7), crossed Adcock (Figure 2-8), and circularly disposed
antenna arrays (CDAA, Figure 2-9). Each has directional properties, and can be used with
direction finding sets to meet specific requirements. Your studies in wave propagation, and
definitions of terms used in antenna theory should have given you the terms you will need to
understand the following discussion.
Figure 2-5. Loop Antenna.
2-7
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