Fundamentals of Electromagnetics with Engineering Applications
5th Edition
ISBN: 9780471263555
Author: Stuart M. Wentworth
Publisher: John Wiley & Sons
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Question
Chapter 7, Problem 7.2P
To determine
The cutoff frequency of eight modes of waveguide with dimensions
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For dominant mode propagation in TE mode, if the rectangular waveguide has a broader dimension of 31.14 mm , then the cut-off wave number:
a) 100
b) 500
c) 50
d) 1000
A rectangular waveguide with a horizontal length a = 3 cm and a vertical length b = 2 cm is filled with a material with a relative dielectric value of 9. What is the frequency value at which a total of 4 modes begin to propagate?
3.54 GHz
1.25 GHz
2.8 GHz
3 GHz
A K band rectangular waveguide has dimensions of a = 1.052 cm and b = 0.432 cm. Calculate the cutoff frequency for TE11 mode if the guide is filled with Teflon whose permittivity is = 2.3
Chapter 7 Solutions
Fundamentals of Electromagnetics with Engineering Applications
Ch. 7 - Find the cutoff frequency for the first eight...Ch. 7 - Prob. 7.2PCh. 7 - Prob. 7.3PCh. 7 - Calculate uG the wavelength in the guide, and the...Ch. 7 - Consider WR975 filled with polyethylene. Find (a)...Ch. 7 - Plot up and wavelength in the guide as a function...Ch. 7 - WR90 waveguide is to be operated at 16 GHz....Ch. 7 - Prob. 7.8PCh. 7 - Prob. 7.9PCh. 7 - Suppose a length of WR137 waveguide operated at...
Ch. 7 - Prob. 7.11PCh. 7 - Prob. 7.12PCh. 7 - Find an expression for the magnetic field of the...Ch. 7 - Prob. 7.14PCh. 7 - Prob. 7.15PCh. 7 - Prob. 7.16PCh. 7 - Compose a program that will plot the left and...Ch. 7 - Prob. 7.18PCh. 7 - Prob. 7.19PCh. 7 - Prob. 7.20PCh. 7 - Prob. 7.21PCh. 7 - Prob. 7.22PCh. 7 - Prob. 7.23PCh. 7 - Prob. 7.24PCh. 7 - Prob. 7.25PCh. 7 - Prob. 7.26PCh. 7 - Suppose nf=1.475 and nc=1.470. Determine the...Ch. 7 - Prob. 7.28PCh. 7 - Prob. 7.29PCh. 7 - Prob. 7.30PCh. 7 - Assume that the coupling efficiency from a typical...Ch. 7 - Prob. 7.32PCh. 7 - Prob. 7.33P
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Similar questions
- An air filled rectangular wave guide has dimensions ,a=2.5 cm and b=1.2 cm .the decreasing order of cut off frequencies for different modes isarrow_forwardFor Microwave Engineering Course Q: Find the cut-off wavelength in a standard rectangular waveguide for TE31 mode having a dimension ratio of 2:1 (given broader dimension of waveguide is 2.286 cm).arrow_forwardIf you check the voltage at one-half wavelength from the end of an RF transmission line, what voltage would you measure? A. Peak B. Infinite C. Minimum D. Zeroarrow_forward
- EXERCISE 2: An air-filled 5- by 2-cm waveguide has Ezs = 20 sin 40zx sin 50my e”v/mat 15 GHz (a) What mode is being propagated? (b) Find B. (c) Determine Ey/Ex.arrow_forwardPLEASE SHOW ALL WORK 2. Following plot is the radiation pattern of an antenna. Determine: a) Antenna gain in dBi and dBd b) Front to back ratio in dB. (Show calculation steps by marking on the diagram)arrow_forwardEvaluate the width of the frequency band around f_0=29GHz within which the reflectance of the radome film does not exceed 5%.arrow_forward
- A rectangular waveguide measures 1.016 x 2.286 cm internally with a signal propagated in it. Complete the table below showing all mathematical expressions used in arriving at the answer. Mode Cut-off Wavelength in cm Cut-off frequency in Ghz 1 TE10 2 TE20 3 TE01 4 TE11 5 TM11 Explain the reasons for the cut-off wavelength and its importance to waveguide propagation.arrow_forwardTwo radio antennas radiating in phase are located at points A and B, 200 m apart. The radio waves have frequency of 5.80 MHz. A radio receiver is moved out from point B along a line perpendicular to the line connecting A and B ( line BC shown in the figure 35.46). At what distances from B will there be destructive interference? Note: The distance of the receiver from sources is not large in comparison to the separation of the sources.arrow_forwardAn antenna is mounted on a 2 meter rod that is held out of level so that the antenna is offset by 0.4' from the bottom of the rod. What is the angular error of the rod? What is the vertical error of the measurement?arrow_forward
- At a certain time, the maximum usable frequency (MUF) for transmission at an angle of incidence of 75° is 20MHz. A) What is the critical frequency in MHz? (Use two decimal places for the final answer) B) What will be the optimum working frequency (OWF) in MHz? (Use two decimal places for the final answer)arrow_forwardHow can you convert the absorption spectrum into Transmittance peaks? Please shortly answer at your own words. Answer should be to the point (specific 4-5 lines).arrow_forwardWhat is the number of cut-off waves of the dominant TE mode in a rectangular waveguide filled with air and having a wide side of 4π cm?arrow_forward
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