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 14.14P
For a dipole antenna of overall length
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A parabolic dish antenna has a diameter of 5 meter, operating at 30 GHz frequency.a) What is the effective area Ae of the antenna?
b) What is the antenna power gain in ratio and in dBi?
b) A particular antenna has a VSWR of 2.4. Determine the following and, in each case, show full
working:
i) Reflection coefficient. Please transpose the equation for VSWR and show your working.
ii) Calculate the mismatch efficiency of the antenna. Show your working.
If the radiation resistance of an areal antenna is 150 ohms, then estimate the effective height of the antenna with respect to the wavelength.
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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- 4. The power density radiated by an isotropic antenna is given by the relation: a) P;/4TtR2 b) P/4R? c) P/R? d) None of the mentionedarrow_forwardSince b=2a=1 cm in a hollow rectangular waveguide, the operating frequency of the waveguide must be ........ GHz<f<......GHz for only the dominant mode to propagate?arrow_forwardShow that the directivity of isotropic antenna is 1.arrow_forward
- If the effective height of an areal is 1/150th of the wavelength, then estimate its radiation resistance. I need to submit the assignment tomorrow. Please help. Will rate thumbs up.arrow_forwardQ1) Very low signal strength in antenna. * Antenna patterns O Major lobes O Minor lobes O Nullarrow_forwardThe gain of an antenna is 25.5 dB. What will be the gain when expressed as a linear quantity?arrow_forward
- If in a rectangular waveguide for which a = 2b, the cutoff frequency for TE2 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 abovearrow_forward6. Design a rectangular patch antenna so that it will resonate at "(X/10)" GHz. The substrate is Rogers 3003 which has dielectric constant of 3 and height 0.75 mm. Take X = 089arrow_forwardI hope to write a simple summary so that I can save it because I have exams Difference between Hertz Antennas (half-wave) and Marconi (quarter-wave) Antennas.arrow_forward
- A)-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_forwardA helical antenna has a mean diameterof 3m and it operates at 5GHz, if its gainis 30dbi. What is its beam-width?arrow_forwardFor a helical antenna, the radiation resistance is 250 ohms and the loss resistance is 50 ohms. Estimate the radiation efficiency of the antenna?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