NETW310-Module 5-Pietro Mariano

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DeVry University, Chicago *

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310

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Electrical Engineering

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Apr 3, 2024

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NETW310 Course Project Module 5 Antenna Gain and Free Space Path Loss Pietro Mariano

Rubric Activity Requirement(s) Points Antenna Gain Answer five questions 22 Free Space Path Loss Answer nine questions 38

1. What is the maximum theoretical antenna gain of a common dish antenna at the 2.4 GHz band? [4 points] Answer: 22.379 2. What is the maximum theoretical antenna gain of a common dish antenna at the 5 GHz band? [4 points] Answer: 29.079 3. Given the same sized reflector, which signals, high-frequency, or low-frequency, can be more efficiently focused by a common dish antenna (i.e., result in a higher antenna gain)? [ 5 points ] Answer: High-frequency, can be more efficiently focused by a common dish antenna 4. What is the maximum theoretical antenna gain of the dish antenna used in the VLA radio telescopes in New Mexico at the 5 GHz band? [4 points] Answer: 63.059 5. Given the same signal frequency, which dish antennas, large-sized or small-sized, are more efficient at focusing the signal (i.e., result in a higher antenna gain)? [ 5 points ] Answer: Large-sized, are more efficient at focusing the signal Antenna Gain

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1. What is the free space path loss in dB at the 2.4 GHz band? [4 points] Answer: -80.4 2. What is the free space path loss in dB at the 5 GHz band? [4 points] Answer: -87.2 3. How does the free space path loss at a higher frequency (e.g., the 5 GHz band) compare with that at a lower frequency (e.g., the 2.4 GHz band)? [ 5 points ] Answer : Higher frequencies (5 Ghz) have greater path loss than lower frequencies (2.4) 4. What is the free space path loss in dB over 20 meters at the 2.4 GHz band? [4 points] Answer: -66.421 5. What is the free space path loss in dB over 40 meters at the 2.4 GHz band? [4 points] Answer: -72.441 6. What is the free space path loss in dB over 80 meters at the 2.4 GHz band? [4 points] Answer: -78.462 7. When the distance doubles, how does free space path loss in dB change approximately? [ 5 points ] Answer: As the distance doubles, the free space path loss goes down approximately - 6.021 db Free Space Path Loss

8. Use a scientific calculator to calculate Delta for D1 = 20 meters and D2 = 40 meters. [4 points] Delta =6.020 9. Is your calculation approximately the same as the result from Part 1 Step 2? [4 points] Answer: No Challenge question: At a different frequency, does the relationship between doubling the distance and the resultant free space path loss still hold true? Answer: Yes, the relationship between doubling the distance and the resultant free space path loss still holds true regardless of frequency. This means that as you double the distance between a transmitter and receiver, the signal strength decreases by a factor of four (6 decibels) due to the spreading of energy over a larger area. This principle holds true regardless of the frequency of the signal being transmitted. Free Space Path Loss Cont.

1. https ://help.ui.com/hc/en-us/articles/115007689527-Intro-to-Networking-Free-Space- Path-Loss-FSPL#:~:text=While%20true%20of%20all%20radio,for%20ultra%2Dlong %20distance%20links . 2. https:// www.cwnp.com/forums/posts?postNum=295865 3. Principles of Electronic Communication Systems: Fourth Edition By: Louis Frenzel References

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