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A circular loop, of loop radius λ/30 and wire radius λ/1000, is used as a transmitting/receiving antenna in a back-pack radio communication system at 10 MHz. The wire of the loop is made of copper with a conductivity of 5 .7 ×10 7 S/m. Assuming the antenna is radiating in free space, determine the (a) radiationresistan ce of the loop;  (b) loss resistance of the loop (assume that its value is the same as if the wire were straight );  (c) input resistance;  (d) input impedance;  (e) radiation efficiency.

A circular loop, of loop radius λ/30 and wire radius λ/1000, is used as a transmitting/receiving antenna in a back-pack radio communication system at 10 MHz. The wire of the loop is made of copper with a conductivity of 5 .7 ×10 7 S/m. Assuming the antenna is radiating in free space, determine the (a) radiationresistan ce of the loop;  (b) loss resistance of the loop (assume that its value is the same as if the wire were straight );  (c) input resistance;  (d) input impedance;  (e) radiation efficiency.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A circular loop, of loop radius λ/30 and wire radius λ/1000, is used as a transmitting/receiving antenna in a back-pack radio communication system at 10 MHz. The wire of the loop is made of copper with a conductivity of 5 .7 ×10 7 S/m. Assuming the antenna is radiating in free space, determine the
(a) radiationresistan ce of the loop; 
(b) loss resistance of the loop (assume that its value is the same as if the wire were straight ); 
(c) input resistance; 
(d) input impedance; 
(e) radiation efficiency. 

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