CWNP CWISA-102 Exam - Topic 3 Question 18 Discussion

Actual exam question for CWNP's CWISA-102 exam

Question #: 18
Topic #: 3

[All CWISA-102 Questions]

As an RF signal propagates it becomes weaker as it gets farther away from the transmitter. What concept is described?

AFree Space Path Loss

BRF latency

CBeamwidth

DDiffraction

Show Suggested Answer

Suggested Answer: A

The concept described isFree Space Path Loss (FSPL). FSPL refers to the reduction in power density of an electromagnetic wave as it propagates through a clear, unobstructed path in free space. This weakening of the signal is due to the spreading of the wavefront as it travels, causing the power to be distributed over a larger area. The FSPL can be calculated using the Friis Transmission Equation, which shows that the received power decreases with the square of the distance from the transmitter. This concept is fundamental to understanding the behavior of RF signals in various communication systems, including wireless IoT, where the signal strength at the receiver is a critical factor for reliable data transmission.

References: The information provided aligns with the Friis Transmission Equation, which models how the power of an RF signal decreases with distance1.Additionally, the concept of FSPL is a well-known phenomenon in RF propagation, affecting the design and optimization of wireless communication systems

by Lenora at Sep 13, 2024, 04:16 AM

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Felix

6 months ago

Beamwidth affects coverage too, but not like this.

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Dorothea

6 months ago

Wait, is that really the main factor?

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Son

6 months ago

Agree, it's all about distance and signal strength.

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Regenia

7 months ago

I thought RF latency was the issue here?

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Janessa

7 months ago

It's definitely Free Space Path Loss.

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Corrie

7 months ago

I feel like diffraction is more about bending waves around obstacles, not really about distance. Free Space Path Loss seems to fit better.

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Wei

7 months ago

I’m a bit confused. I thought RF latency was about delays, not signal strength. Could it be something else?

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Zoila

7 months ago

I remember practicing a question like this, and I think it was definitely related to how RF signals weaken. Free Space Path Loss sounds right.

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Ciara

8 months ago

I think this is about how signals lose strength over distance, so it might be Free Space Path Loss, but I'm not entirely sure.

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Colette

8 months ago

Free space path loss, that's the one. As the signal travels farther from the transmitter, the power of the signal decreases due to free space path loss. Straightforward concept, I've got this.

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Elmer

8 months ago

Wait, is it free space path loss or diffraction? I'm a little confused on the difference between those two concepts. I'll have to review my notes before answering this one.

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Mendy

8 months ago

Okay, I think I've got this. The weakening of the signal as it propagates is due to free space path loss. That's the concept they're looking for in this question.

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Denna

8 months ago

Hmm, I'm not totally sure about this one. I know the signal gets weaker over distance, but I'm not confident which specific concept that refers to. I'll have to think it through carefully.

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Teresita

8 months ago

This one seems pretty straightforward. The concept that describes how the signal gets weaker as it travels farther from the transmitter is free space path loss.

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Leonor

8 months ago

I think the AXISP7214 might be the right choice, but I need to double-check if it supports three streams at D1 resolution.

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Kanisha

2 years ago

Wait, is this a trick question? Are they looking for 'Inverse Square Law' or something? I'm overthinking this, aren't I?

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Kristin

2 years ago

RF latency? Nah, that's not about signal strength, that's all about the time it takes to get there. Nice try, though.

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Fletcher

2 years ago

Beamwidth? Really? Unless the transmitter is a disco ball, I don't think that's the right answer.

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Jesusa

2 years ago

Yeah, the signal weakens as it travels through space.

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Lauran

2 years ago

I think it's A) Free Space Path Loss.

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Kris

2 years ago

D) Diffraction

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Kenneth

2 years ago

A) Free Space Path Loss

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Micaela

2 years ago

Hmm, I'm gonna go with Diffraction on this one. Gotta love that good ol' wave bending action.

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Fletcher

2 years ago

Free Space Path Loss for sure! That's basic RF 101.

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Dalene

1 year ago

C) Beamwidth

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Carlee

2 years ago

B) RF latency

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Linwood

2 years ago

Definitely Free Space Path Loss.

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Shayne

2 years ago

A) Free Space Path Loss

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Lauran

2 years ago

Free Space Path Loss. It's like the signal is getting tired of traveling and just decides to take a nap before it reaches the receiver. Where's the energy drink for signals when you need it?

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Maryanne

2 years ago

B) RF latency

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Corinne

2 years ago

Maybe we can invent an energy drink for signals to keep them going strong!

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Pansy

2 years ago

C) Beamwidth

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Laila

2 years ago

I know right, it's like the signal needs a boost to keep going!

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Glenna

2 years ago

D) Diffraction

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Johnna

2 years ago

A) Free Space Path Loss

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Ettie

2 years ago

RF latency? Come on, that's about the time it takes for the signal to reach the receiver, not the strength. This is clearly about Free Space Path Loss.

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Ashley

2 years ago

Diffraction, for sure! The signal is probably bending around obstacles and losing strength. Gotta love those pesky physics concepts!

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Keena

2 years ago

I agree! Understanding diffraction helps us optimize signal strength and coverage in wireless communication.

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Kina

2 years ago

Definitely! Diffraction plays a big role in signal propagation. It's fascinating how it interacts with obstacles.

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Diane

2 years ago

Diffraction, for sure! The signal is probably bending around obstacles and losing strength. Gotta love those pesky physics concepts!

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Glendora

2 years ago

D) Diffraction

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Francoise

2 years ago

C) Beamwidth

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Barrie

2 years ago

B) RF latency

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Beatriz

2 years ago

A) Free Space Path Loss

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Brynn

2 years ago

I'm going with Beamwidth. The transmitter's signal is probably just too narrow to reach the far end of the room. Maybe it needs some more antenna gain?

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