Problem 2.4Assume that the antennas in Problem 2.3 are dish antennas such that A =. If thebeamwidth factor for either antenna is 51°, find the beamwidth of each antenna foreach frequency.Problem 2.5A receiver is located 5 km from a transmitter in free space. The output at the termi-nals of the receive antenna is -87 dBm. The receive antenna has a gain of 2 dBd andthere is a total of 2.8 dB of system loss. Calculate the transmitter EIRP in watts givena transmit frequency of 890 MHz. If the transmit antenna has a gain of 7.5 dBi, whatis the transmit power in watts?Problem 2.6A transmitter radiates an ElIRP of 1 W into free space. A receive antenna located at 1 kmfrom the transmitter has a gain of 5 dBi. Assume that there are 2 dB of system loss.A. If the system operates at 900 MHz, what is the power level at the output of theontonna terminals?

The region where the majority of the power is emitted, which is the peak power, is known as the beam…

Answered: Assume that the antennas in Problem 2.3…

Assume that the antennas in Problem 2.3 are dish antennas such that A = . If the beamwidth factor for either antenna is 51°, find the beamwidth of each antenna for each frequency. %3D

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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Concept explainers

Antenna Characteristics

The antenna is an important concept in the domain of electronics and communication engineering. An antenna forms an integral part of many commonly used devices such as wireless modems, routers, game controllers, mobile phones, bluetooth devices, and so on. In simple terms, any wireless communication makes use of antennas to serve the purpose. An antenna, also known by the term 'arial', is an electrical device that converts electrical signals into electromagnetic waves or electromagnetic waves into electrical signals. An antenna contains a transmission line usually made up of co-axial cable, it then receives the signals and converts them into electromagnetic waves, which are then transmitted via space into their required destination. A communication system essentially makes use of two antennas, a transmission antenna, which converts electrical signals into electromagnetic waves, and a receiving antenna, which receives the electromagnetic waves and converts them back into electrical signals.

Question

Problem 2.4
Assume that the antennas in Problem 2.3 are dish antennas such that A =. If the
beamwidth factor for either antenna is 51°, find the beamwidth of each antenna for
each frequency.
Problem 2.5
A receiver is located 5 km from a transmitter in free space. The output at the termi-
nals of the receive antenna is -87 dBm. The receive antenna has a gain of 2 dBd and
there is a total of 2.8 dB of system loss. Calculate the transmitter EIRP in watts given
a transmit frequency of 890 MHz. If the transmit antenna has a gain of 7.5 dBi, what
is the transmit power in watts?
Problem 2.6
A transmitter radiates an ElIRP of 1 W into free space. A receive antenna located at 1 km
from the transmitter has a gain of 5 dBi. Assume that there are 2 dB of system loss.
A. If the system operates at 900 MHz, what is the power level at the output of the
ontonna terminals?

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