Multiple Choice For RF line of sight or LOS communication, ____ of the first Fresnel zone must be clear of obstacles.50%60%70%80% What is the maximum line-of-sight distance (D) between a paging antenna 800 ft high and a pager receiver antenna 40.5 ft off the ground?35 mile49 mile40 mile38 mile IEEE 802.11 ___ devices can only use MIMO antennas.abgn In Yagi antenna, reflector is ____ greater than λ/2.10%7%12%5% What is the frequency range of Sky waves?3 KHz to 2 MHz2 MHz to 30 MHz30 MHz to 300 GHz3 GHz to 30 GHz What is the impedance of Folded Dipole antenna?377Ω73Ω5Ω300Ω Standing wave is the composition of __________ voltage.Incident & loadReflected & loadIncident & ReflectedNone of the above ______________ is obtained by dividing the speed of light (or radio) wave in a vacuum, and the speed of light (or radio) wave in the medium that causes the wave to be bent.Diffraction IndexReflection IndexRefraction IndexDeflection Index A MIMO technique of sending the same transmission out from different antennas that will take different paths is called:Transmit beamformingMaximal ratio combiningSpatial diversitySpatial multiplexing AM broadcast signals are propagated primarily by ground waves during the day and its antenna must maintain ______________ polarization.HorizontalEllipticalConicalVertical

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Answered: For RF line of sight or LOS…

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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Multiple Choice

For RF line of sight or LOS communication, ____ of the first Fresnel zone must be clear of obstacles.
50%
60%
70%
80%

What is the maximum line-of-sight distance (D) between a paging antenna 800 ft high and a pager receiver antenna 40.5 ft off the ground?
35 mile
49 mile
40 mile
38 mile

IEEE 802.11 ___ devices can only use MIMO antennas.
a
b
g
n

In Yagi antenna, reflector is ____ greater than λ/2.
10%
7%
12%
5%

What is the frequency range of Sky waves?
3 KHz to 2 MHz
2 MHz to 30 MHz
30 MHz to 300 GHz
3 GHz to 30 GHz

What is the impedance of Folded Dipole antenna?
377Ω
73Ω
5Ω
300Ω

Standing wave is the composition of __________ voltage.
Incident & load
Reflected & load
Incident & Reflected
None of the above

______________ is obtained by dividing the speed of light (or radio) wave in a vacuum, and the speed of light (or radio) wave in the medium that causes the wave to be bent.
Diffraction Index
Reflection Index
Refraction Index
Deflection Index

A MIMO technique of sending the same transmission out from different antennas that will take different paths is called:
Transmit beamforming
Maximal ratio combining
Spatial diversity
Spatial multiplexing

AM broadcast signals are propagated primarily by ground waves during the day and its antenna must maintain ______________ polarization.
Horizontal
Elliptical
Conical
Vertical

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