7.3 A Yagi aerial consists of a dipole of 73 + j0 22 imped-ance and a parasitic element of 81 +j108 22 impedance. Themutual impedance between the two elements is 40-j30 n.Calculate the ratio of the powers radiated in the directionsdipole to parasitic and parasitic to dipole. Hence state whetherthe parasitic element is a reflector or a director.74 An aerial orrau concioto f three)heights of the aerials if the k-factor is 0.65 and thewave is to clear the sea by a distance equal to 0.57the first Fresnel zone. If a second aerial is fitted to givediversity, calculate its height also.8.2 An ionospheric layer has a maximum electron =of 1.6 x 10¹¹ electrons/m³ and it is at a virtual he

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7.3 A Yagi aerial consists of a dipole of 73 + j0 22 imped- ance and a parasitic element of 81 +j108 2 impedance. The mutual impedance between the two elements is 40 - j30 2. Calculate the ratio of the powers radiated in the directions dipole to parasitic and parasitic to dipole. Hence state whether the parasitic element is a reflector or a director.

7.3 A Yagi aerial consists of a dipole of 73 + j0 22 imped- ance and a parasitic element of 81 +j108 2 impedance. The mutual impedance between the two elements is 40 - j30 2. Calculate the ratio of the powers radiated in the directions dipole to parasitic and parasitic to dipole. Hence state whether the parasitic element is a reflector or a director.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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7.3 A Yagi aerial consists of a dipole of 73 + jo 22 imped- ance and a parasitic element of 81 +j108 22 impedance. The mutual impedance between the two elements is 40 -j30 n. Calculate the ratio of the powers radiated in the directions dipole to parasitic and parasitic to dipole. Hence state whether the parasitic element is a reflector or a director. 74 An aerial orrau concioto f three) heights of the aerials if the k-factor is 0.65 and the wave is to clear the sea by a distance equal to 0.57 the first Fresnel zone. If a second aerial is fitted to give diversity, calculate its height also. 8.2 An ionospheric layer has a maximum electron = of 1.6 x 10¹¹ electrons/m³ and it is at a virtual he
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