A resonant loop antenna of closely spaced 8 turns isoperating at 100 MHz. The radius of the loop
is λ/20, and the loop is connected to a 75-Ω transmission line. Theradius of the wire is λ/300, its
conductivity σ = 5.7 × 107 S/m, and the spacing between the turnsis 3λ/250. Find the radiation
efficiency of the antenna, while taking into account the proximityeffects of the turns.
