Fundamentals of Electromagnetics with Engineering Applications
1st Edition
ISBN: 9780470105757
Author: Stuart M. Wentworth
Publisher: Wiley, John & Sons, Incorporated
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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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Students have asked these similar questions
What is a waveguide? What is a slab waveguide? What is a planar waveguide? What is thin slab?
Circular waveguides
*:For a certain mode, in a rectangular waveguide, propagation occurs for signals
Information are not sufficient to decide O
Whose frequency is above the cut off frequency
Whose frequency is below the cut off frequency
Depending on the dimensions of the waveguide and dielectric O
The dominant mode of propagation is preferred with rectangular waveguides
* because
we can use air as dielectric O
it is easier than other modes and leads to smallest dimension of waveguide
it is easier than the other modes
it leads to smallest dimension of waveguide
none of metioned
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
- 3) Solve the cutoff frequency for the first mode and second mode of WR975 Wave guide TABLE 7.1 Some Standard Rectangular Waveguides Waveguide de signation a (in) b (in) t (in) fe, (GHz) Frequency range (GHz) WR975 9.750 4.875 0.125 0.605 0.75-1.12 WR650 6.500 3.250 0.080 0.908 1.12–1.70 WR430 4.300 2.150 0.080 1.375 1.70-2.60 WR284 2.840 1.340 0.080 2.08 2.60-3.95 WR187 1.872 0.872 0.064 3.16 3.95-5.85 WR137 1.372 0.622 0.064 4.29 5.85-8.20 WR90 0.900 0.450 0.050 6.56 8.2–12.4 WR62 0.622 0.311 0.040 9.49 12.4–18arrow_forwarda. Enumerate all the possible modes that the given waveguide can operate. b. Determine the mode closest to the dominant mode.arrow_forwardwhat are the modes of waveguide from where does they origionate?arrow_forward
- The return loss of a device is found to be 20 dB. The voltage standing wave ratio (VSWR) and mag nitude of reflection coefficient are respectively (A) 1.22 and 0.1 (B) 0.81 and 0.1 (C) -1.22 and 0.1 (D) 2.44 and 0.2arrow_forwardFind the core diameter for a SMF in the 2nd window if ncore=1.48 & ncladd=1.478 ?arrow_forwardTwo rectangular waveguides, one of them is an air filled with internal dimension 1? 2 cm2 and the other one is dielectric filled with internal dimension 1? 0.5 cm2. They have the same cut off frequency for the dominant mode. What is the relative permittivity of the dielectric material?arrow_forward
- IN rectangular waveguide, we know that in TM mode field, Ez (longitudinal field) is out f phase by 90 degree, why is it?arrow_forwardA typical single mode optical fiber has a core of diameter 8 mm and a refractive index of 1.46. relative refractive index difference is 0,3 %. What is the numerical aperture and acceptance angle of the fiber respectively? Lütfen birini seçin: o a.0.094 5.42 b.0.113 7.80 c.0.389 6.48 d.0.420 4.29 e.0.113 6.48arrow_forwardDetermine the ratio of the area of a circular wave guide to that of a rectangular one, if both are to have same cut-off frequency for the dominate mode.arrow_forward
- The return loss of a device is found to be 30 dB. What will be the value of the voltage standing wave ratio and the magnitude of the reflection coefficient?arrow_forwardA 2 V signal is incident to the interface from a 75 Ohm region propagating to a 50 Ohm impedance region. What is the reflection coefficient? What is value of the incident, reflected and transmitted wave? What voltage would you measure on either side of the interface right after the signal goes through the interface. For the interface, I'm a little confused. I used a voltage divider and got V_transmitted = 0.8 and V_incident = 1.2. But shouldn't they be the same?arrow_forwardDesign a microstrip for a 50 ohms characteristic impedance. Use h=1.6mm epoxiglass substrate. Calculate the the wavelenght of a 2GHz signal in this waveguide.arrow_forward
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