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Netw360 Full Course Latest 2015 [ All Discussions All Ilabs All Project and Only Week 2 Quiz and No Final ]

  • Date Submitted: 05/29/2016 12:43 AM
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netw360 full course latest 2015 [ all discussions all ilabs all project and only week 2 quiz and no final ]
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week 1) Given an RF cable with a certain length, signal loss/attenuation in the cable increases with frequency.
d) Given a RF cable and a signal frequency, signal loss/attenuation in the cable increases with distance.
Use the calculator in the Loss in a Coaxial Cable at 2.45 GHz section to complete the following steps:
1. Next to Choose type of cable, select LMR 400. This is a TMS cable that supports both 2.4 GHz and 5 GHz RF signals. 100 feet of such cable used on the 2.5 GHz range decreases the signal strength by about 6.76 dB (that is, 6.76 dB signal loss per 100 feet).
2. Click in the Length (meter) box and type 30.48 (100 feet = 30.48 meters). Click m?dB. What is the loss at this length? _____
3. Click in the Length (meter) box and type 60.92 (200 feet = 30.48 meters). Click m?dB. What is the loss at this length? _____
4. When the cable length doubles, how does the loss change approximately? _____
Task 3: Antenna gain calculations
Antennas are often used to increase the power output of a transmitter. Antennas achieve this by focusing the existing power in a specific direction. Notice that the amount of power provided to the antenna from the transmitter does not change; the signal gain created by antennas is a passive gain.
Antenna gain in dBi or dBd is a parameter that describes the directionality characteristic of an antenna. Given a particular type of antenna, the higher the antenna gain, the more directional the antenna is, and the more focused the existing power is in a specific direction.
Parabolic or dish antennas are an example of highly directional antennas. Due to their relatively high antenna gain, dish antennas are typically used for point-to-point transmission links. The antenna gain of a parabolic antenna is directly related to the diameter of a...

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