1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
HACTEHA [7]
3 years ago
10

Given: an 802.11 wlan transmitter that emits a 50 mw signal is connected to a cable with 3 db loss. the cable is connected to an

antenna with 16 dbi gain. what is the eirp power output?
Physics
1 answer:
CaHeK987 [17]3 years ago
8 0

-- A transmitter has 50 mW output power.  

50 mW is equivalent to +17 dBm.

(+17 is a magic number.  It tells us that the transmitter could very well be based on a single modulated Gunn diode oscillator, which, after resonating and filtering to remove the unwanted puree, hash, and garbage, typically delivers right around +17 dBm at the output.  

-- The power passes through a piece of lossy cable, where it loses 3 dB.

+17 dBm went into the cable.   +14 dBm came out of the other end.  

(The lost 3 dBm warmed the cable.)  

-- The power was then coupled (losslessly) to an antenna with +16 dB "gain".

+14 dBm went into the antenna.  It was shaped and focused so that coming out of the antenna in a certain direction, it sounded as loud as a source that's radiating (+14 + 16) = <em>+30 dBm = 1 watt</em> .

This is NOT 1 watt of real power output.  The antenna has no batteries, it isn't plugged into a wall outlet, and it has no actual 'gain'.  

That 1 watt is "eirp" . . . <em>"</em><em>E</em><em>ffective </em><em>I</em><em>sotropic </em><em>R</em><em>adiated </em><em>P</em><em>ower"</em>.  The antenna focuses most of its power in one certain narrow direction, and then, <u><em>in that direction</em></u>, it sounds as loud as an antenna would that took 1 watt and spread it equally in <em>all</em> directions.

You might be interested in
Sound waves are mechanical waves in which the particles in the medium vibrate in a direction parallel to the direction of energy
ch4aika [34]

C longitudnal waves

4 0
3 years ago
Read 2 more answers
Unlike the idealized voltmeter, a real voltmeter has a resistance that is not infinitely large. part a a voltmeter with resistan
Margaret [11]
The EMF of the battery includes the force to to drive across its internal resistance. the total resistance:  
R = internal resistance r + resistance connected rv 
R = r + rv  
Now find the current:  
V 1= IR 
I = R / V1  
find the voltage at the battery terminal (which is net of internal resistance) using  
V 2= IR  
So the voltage at the terminal is:  
V = V2 - V1  
This is the potential difference vmeter measured by the voltmeter.
6 0
3 years ago
Read 2 more answers
Which force is always pulling but never pushes and is directly influenced by mass
Lapatulllka [165]
<h2>Answer: I know when it comes to magnetic objects the magnet always pulls not push.</h2>
7 0
3 years ago
Read 2 more answers
What type of stars will potentially one day
xz_007 [3.2K]

Answer:

2, High mass stars.

Add-on:

i hope this helped at all. im sorry if its incorrect.

4 0
2 years ago
In order for maximum work to be done...
Tju [1.3M]

free lil peezy and drake is kool

5 0
2 years ago
Read 2 more answers
Other questions:
  • A high power line carries a current of 1.0 kA. What is the strength of the magnetic field this line produces at the ground, 10 m
    10·1 answer
  • A planet has been observed orbiting a nearby star. This star has a mass of 3.5 solar masses, and the planet is 4.2 AU from the s
    14·4 answers
  • Why does the pH change when you add water to chicken soup?
    14·1 answer
  • An observation of the red shift of galaxies suggestst that the universe is
    8·1 answer
  • A 0.50 kg object is at rest. A 2.88 N force to the right acts on the object during a time interval of 1.48 s. a) What is the vel
    6·1 answer
  • Ok so I am taking a test I need help please
    10·1 answer
  • When drawing a free body diagram, which of the following things would NOT be included
    9·1 answer
  • Describe how charge is transferred from the ruler to the metal rod.
    6·2 answers
  • What characteristics determine how easily two substances change temperature
    10·1 answer
  • A film badge worn by a radiologist indicates that she has received an absorbed dose of 2. 5 x 10-6 gy. the mass of the radiologi
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!