Fundamentals of Electromagnetics with Engineering Applications
5th Edition
ISBN: 9780471263555
Author: Stuart M. Wentworth
Publisher: John Wiley & Sons
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Chapter 10, Problem 10.4P
Design an L-section matching network to match a
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A cellular radio transmitter has a power output of 3 W at 800 MHz. It uses an antenna with a gain of 3 dBi. The receiver is 5 km away, with antenna gain of 12 dBi. Ignoring feedline losses and mismatch, calculate
(a) the EIRP in dBW
(b) the free space path loss,
(c) the power delivered to the receiver in W and dBm
Since S = 2.5 in the 50 ohm transmission line used at 1.5 GHz and the distance to the minimum voltage point closest to the load is 3 cm; How many ohms should the load impedance be calculated using the Smith Diagram?
a)44 - j 44
b)24 - j 24
c)24 + j 24
d)44 - j24
e)44 + j 44
An RF link, which includes transmitting and receiving antennas, operates at 10 GHz. The transmitting and receiving antennas are separated by a distance of 1 m. The transmitting and receiving antenna both have a gain of 10 dBi. If 20 dBm is fed to the transmitting antenna, determines the received power in dBm.
Chapter 10 Solutions
Fundamentals of Electromagnetics with Engineering Applications
Ch. 10 - A matching network consists of a length of a...Ch. 10 - Design an L-section matching network to match a...Ch. 10 - Design an L-section matching network to match an...Ch. 10 - Design an L-section matching network to match a...Ch. 10 - Suppose you want to match a 100 line to a load...Ch. 10 - Prob. 10.7PCh. 10 - Prob. 10.8PCh. 10 - Prob. 10.9PCh. 10 - Prob. 10.10PCh. 10 - Suppose the L-section matching network of Example...
Ch. 10 - Find the scattering matrices for the simple...Ch. 10 - Cut a 50- T-line and insert a series 50- resistor...Ch. 10 - Prob. 10.14PCh. 10 - A series capacitor of value C=2.0pF is inserted in...Ch. 10 - A series inductor of value L=3.5nH is inserted in...Ch. 10 - Prob. 10.17PCh. 10 - The scattering matrix (assuming a 50- impedance...Ch. 10 - Three T-lines with the same characteristic...Ch. 10 - Consider a three-port network that is matched at...Ch. 10 - Prob. 10.21PCh. 10 - Calculate the insertion loss and the VSWR for the...Ch. 10 - Prob. 10.23PCh. 10 - Verify the scattering matrix (10.27) for the...Ch. 10 - Prob. 10.25PCh. 10 - Prob. 10.26PCh. 10 - A four-port 20-dB coupler is specified as having...Ch. 10 - Suppose the coupling for an ideal symmetrical...Ch. 10 - Suppose to port 1 of an ideal ring hybrid coupler...Ch. 10 - Prob. 10.30PCh. 10 - Prob. 10.31PCh. 10 - Prob. 10.32PCh. 10 - Suppose you join a pair of quadrature hybrid...Ch. 10 - Prob. 10.34PCh. 10 - Prob. 10.35PCh. 10 - Prob. 10.36PCh. 10 - Prob. 10.37PCh. 10 - Prob. 10.38PCh. 10 - Prob. 10.39PCh. 10 - Prob. 10.40PCh. 10 - Starting with the Figure 10.28b circuit...Ch. 10 - Starting with the Figure lO.28b circuit...Ch. 10 - Prob. 10.43PCh. 10 - Starting with the Figure 10.28a circuit...Ch. 10 - Prob. 10.45PCh. 10 - For Problem 10.45, (a) design open-ended shunt...Ch. 10 - Prob. 10.47PCh. 10 - Prob. 10.48PCh. 10 - Prob. 10.49PCh. 10 - Prob. 10.50PCh. 10 - Prob. 10.51PCh. 10 - Referring to Example 10.21 and Figure 10.48,...
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- What is the total output power of a communication system with 2 watts ofpower if it passes a transmission cable with 2dB/km attenuation at 16 km?arrow_forwardMultiple Choice directions: Circle the letter of the answers 7. This is a special microwave coaxial cable used in the lower microwave bands L, S, and C. a. Flexible coaxial b. All of the above c. Hard line cable d. Braided coaxial 8. The practical microwave region is in the vicinity of a. 1-10 GHz b. 1-20 GHz c. 1-300 GHz d. 1-30 GHz 9. In a hybrid ring, if the signal is applied at port 1, which port has no output? a. 3 b. 2 c. 1 d. 4 Note: Explanation is not needed just provide the correct answers for each number.arrow_forwardA cellular radio transmitter has a power output of 3W operating at a frequency of 800MHz, using a 7dB gain antenna. The receiver is located at a distance of 8km with a 12dB antenna from this point. A)Calculate the power received at the receiver and express it in dBm.B)Now consider losses in the transmission lines in both the transmitter and receiver of 1dB and 1.5dB respectively, and calculate the power received at the receiver.arrow_forward
- A transmitter supplied by 100W power is used with an antenna having a gain of 5dBi. *Calculate the EIRP in dBm*Calculate the power density (µW/m^2) at distance of 10km.arrow_forwardA 3m coax transmission line used for transmission of a 3Ghz signal, has a characteristic impedance of 120 ohms. The dielectric in the line has a relative permittivity of 2.75. If the line is terminated in a load impedance of 75-j150 ohms, determine the impedance at the sending end. Show complete solutionarrow_forwardIn a double side-band (DSB) full carrier AM transmission system, if the modulation index is doubled, what will be the efficiency of the transmission system? Express the answer in percentage.arrow_forward
- A wireless communication system has a trasmit power Pt = 10 mW. Through extensive measurements, the path gain of the system at the reference distance is determined to be -32 dB, and the path loss exponent to be 3.8. Using the simplified path loss model, find the received power in mW at distance 200 meters from the transmitterarrow_forwardThe numerical input/output mean optical power ratio in a 1 km, length of optical fiber is found to be 2.5. Calculate the received mean optical power when a mean optical power of 1 mW is launched into a 5 km length of the fiber (assurning no joints or connectors).arrow_forwardWhat is the input impedance of a 50 Ω open circuit transmission line of length λ ⁄ 8, in ohms?arrow_forward
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How does an Antenna work? | ICT #4; Author: Lesics;https://www.youtube.com/watch?v=ZaXm6wau-jc;License: Standard Youtube License