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.

Solutions

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 1 month ago

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