4.9 A transmitting antenna has an input current of 0.04 A (peak) and radiates a far-zone electric fieldgiven by[21.8 for 0<0 < 12for 12 <0 < 180 V/m (peak).ejkorE (r. 0.) =Find the gain of the antenna, in dB, and the radiation resistance, if the efficiency of the antenna išknown to be 80%.

Given: A transmitting antenna has an input current of 0.04 A (peak) and radiates a far-zone electric…

Answered: 4.9 A transmitting antenna has an input…

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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Design a Dolph-Tschebyscheff broadside array of 8 elements, 25-dB sidelobe level, and with a spacing of λ/2 between the elements to operate at 3 GHz. Choose a “rectangular patch” or a "dipole" antenna as the array element that operates at 3 GHz. For the final antenna design, determine the: • Half-power beamwidth (in degrees). How much narrower or wider (in degrees) is thishalf-power beamwidth compared to that of a uniform array of the same number ofelements and spacing?• How much smaller or larger (in dB) is the gain (in dB) compared to that of a uniformarray of the same number of elements and spacing? Justify you answer. Do you expectit? Why?
A 0.48520λ0 dipole antenna is made to work at 4 GHz. The antenna is then connected to a 12 V voltage source which has an internal resistance of 25 Ω) a) Make a diagram of the above system, b) Is an impedance matching circuit needed? If yes, where should the impedance circuit be inserted and make a diagram of the system with the adjusting circuit, c) How many cm is the length of the dipole antenna above, Solve Subparts A,B,C in 25 minutes ASAP
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A 0.48520λ0 dipole antenna is made to work at 4 GHz. The antenna is then connected to a 12 V voltage source which has an internal resistance of 25 Ω) a) Make a diagram of the above system, b) Is an impedance matching circuit needed? If yes, where should the impedance circuit be inserted and make a diagram of the system with the adjusting circuit, c) How many cm is the length of the dipole antenna above, d) How much power is emitted when not using the adjusting circuit and e) How much power is emitted when using the adjusting circuit. Solve subparts D,E max 20 minutes ASAP
A screen, having a Screening Effectiveness (S) of 31.62 at 100 MHz, is located 5 m from a 2 cm radius conductor loop that carries a signal current of 7.5 mA at a frequency of 100 MHz. Determine the maximum electric field strength transmittedthrough the screen (Et, µVm-1) resulting from radiated emissions emanating from the conductor loop.
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The normalized radiation intensity of a given antenna is given by(a) U = sin θ sin φ (b) U = sin θ sin2 φ(c) U = sin θ sin3 φ (d) U = sin2 θ sin φ(e) U = sin2 θ sin2 φ (f) U = sin2 θ sin3 φThe intensity exists only in the 0 ≤ θ ≤ π, 0 ≤ φ ≤ π region, and it is zeroelsewhere. Find the(a) exact directivity (dimensionless and in dB).(b) azimuthal and elevation plane half-power beamwidths (in degree
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4.9 A transmitting antenna has an input current of 0.04 A (peak) and radiates a far-zone electric field given by ekor [21.8 for 0<0<12 E (r.0.)D v/m (peak). o1 Find the gain of the antenna, in dB, and the radiation resistance, if the efficiency of the antenna is for 12< 0 < 180 known to be 80%.