A resonant loop antenna of closely spaced 8 turns is operating at 100 MHz. The radius...

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

Expert Solution

For the given values the radiation efficiency is calculated as below :

Now finding loss resistance,

For 8 turns and for c/b ratio the value of R_p/R_o is very less which is approximately 0.1.

So the radiation efficiency is about 97%.

Manojponduru answered 5 months ago

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