Engineering Electromagnetics
9th Edition
ISBN: 9780078028151
Author: Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher: Mcgraw-hill Education,
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Chapter 14, Problem 14.15P
To determine
The location in the term of
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12.6 If in a rectangular waveguide for which a = 2b, the cutoff frequency for TE92 mode is
12 GHz, the cutoff frequency for TM, mode is
(a) 3 GHz
(b) 3V5 GHz
(c) 12 GHz
(d) 6V5 GHz
(e) None of the above
The gain of an antenna is 25.5 dB. What will be the gain when expressed as a linear quantity?
Problem 3. A receiver front end has a noise figure of 10 dB and a gain of
60 dB and a bandwidth of 12 MHz. The input signal power is 10-11 W. The
antenna temperature is 180° K. Find Te, Ts, Nout, SNRin and SNRout. You
may use To=290° K and Boltzmann's constant equals 1.38 x 10-23 J/K.
Chapter 14 Solutions
Engineering Electromagnetics
Ch. 14 - A short dipole-carrying current I0 cos t in the az...Ch. 14 - Prepare a curve, r vs. in polar coordinates,...Ch. 14 - Prob. 14.3PCh. 14 - Write the Hertzian dipole electric field whose...Ch. 14 - Prob. 14.5PCh. 14 - Prob. 14.6PCh. 14 - Prob. 14.7PCh. 14 - Prob. 14.8PCh. 14 - A dipole antenna in free space has a linear...Ch. 14 - Prob. 14.10P
Ch. 14 - A monopole antenna extends vertically over a...Ch. 14 - Find the zeros in for the E-plane pattern of a...Ch. 14 - Prob. 14.13PCh. 14 - For a dipole antenna of overall length 2l=,...Ch. 14 - Prob. 14.15PCh. 14 - Prob. 14.16PCh. 14 - Consider a lossless half-wave dipole in flee...Ch. 14 - Prob. 14.18PCh. 14 - Prob. 14.19PCh. 14 - A two-element dipole array is configured to...Ch. 14 - Prob. 14.21PCh. 14 - Prob. 14.22PCh. 14 - Prob. 14.23PCh. 14 - Prob. 14.24PCh. 14 - Prob. 14.25PCh. 14 - Prob. 14.26PCh. 14 - Consider an n-element broadside linear array....Ch. 14 - A large ground-based transmitter radiates 10 kW...Ch. 14 - Signals are transmitted at a 1-m carrier...Ch. 14 - Prob. 14.30P
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- This subject is antenna and wave propagation of ece pls solve neatly and faster thanksarrow_forwardA)-An antenna has the following S-parameter , find the resonant frequency (f.) and the bandwidth (BW). S. -lo d3 - 20-dB -30 dB 1 2. 3. 4. B)-sketch the radiation pattern of a directional antenna indicating the main lobe , side lobes and back lobe , then explain how to calculate the beam width?arrow_forwardWhat is the gain of an isotropic antenna in decibel?arrow_forward
- An antenna has Umax = 12 W/sr and U, = 9 W/sr and a radiation efficiency of 90%. The gain of the antenna is: O A. 0.75 O B. 0.675 O C. 1.2 O D. 1.33arrow_forwardIn an air line, adjacent maxima are found at 12.5 cm and 37.5 cm. The operating fre- quency is (a) 1.5 GHz (b) 600 MHz (c) 300 MHz (d) 1.2 GHzarrow_forward14.1 Optical spectrum analyzers directly measure the wavelength of light in an air environment. However, most wavelength measurements are quoted in terms of wavelengths or optical frequencies in a vacuum. This can lead to errors, particularly in DWDM systems, since the index of refraction of air is a function of wavelength, temperature, pressure, and gas composition. The wavelength dependence of the index of refraction ni, of standard dry air at 760 torr and 15°C is64 2406030 15997 n =1+ 10 8342.13 + air 1 38.9 – 1 130 – where A is measured in micrometers.arrow_forward
- If the carrier signal is Ve (t) = Ve Sin (Wst). And the information signal is used to generate AM wave Vm (t) = Vm Sin (t), the AM Bandwidth is equal to 12 KHz, modulation index m = 0.5 and the spectrum frequency for AM is shown figure: 6 -100-6fm -100 -100+6fm 100-6fm 100 100+6fm KHZ | 1- determine Wc. Wm, fm. fe 2- draw the AM wave in time domain 3. determine Vm. Vs 4-determine the power at carrier of the antenna resistance one ohm (1 2) 5- Write the AM equation with all values.arrow_forwarda rectangular air-filled copper waveguide with dimension 2.28 cm x 1.01 cm across section and 30.48 cm length is operated at 9.2 GHz with a dominant mode. Find a)characteristic impedance b) attenuattion in dBarrow_forwardPrepare a table of values for the change of maximum usable frequency when an incident angle change from 90° to 0° (calculate for every 10 degrees), and plot a graph, assume that the critical frequency is constant at 30MHZ. and give your observation over the graph.arrow_forward
- What is the cut-off wavelength of the TE03 mode in a rectangular waveguide filled with air and with a small side of 3 cm?arrow_forward2) Given the following geometry, determine a) the loss due to knife edge diffraction and b) the height of the obstacle required to induce 6 dB diffraction loss. Assume f = 900 MHz. Knife edge T 100 m 50 m 25 m 10 km 2 km (Ans: 25.5 dB; 4.16m]arrow_forwardProblem 1. Propagation loss and bending loss Assume you design a waveguide that is 3 mm long and experiences 5 bends. If the propagation loss is 3 dB/cm and the bending loss is 0.07 dB per bend. How much insertion loss do you expect?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