Microwave Antenna

I also require to know which is the longest distance this microwave antenna can cover, to make jumps from antenna to antenna. Thanks in advance.

Yep. I would have said... don't stick it in your ear.... but apart from that....

30dBm is 1W. Doesn't really light much of a bulb. Your cell phone might put out something very similar right next to your ear, though...

Having said that... at 8GHz one could potentially focus this energy on a rather small spot (lambda being on the order of only an inch or so). So if your microwave antenna happened to be focusing on a spot and you are right in it... you might feel some heat. But that is usually not how one would operate such an antenna. Instead it would be a dish which makes a relatively wide but well collimated beam. And stepping into that will do only one thing: stop communications completely.

2008-01-15 13:32:00 by alexandrovm1

The Path Align-R test set is a high performance, complete test solution designed to quickly and accurately optimize the transmission path between ...

A microwave antenna with a mass of 100kg sits atop a tower that is 40m tall. What is the antenna’s potential energy?

Potential energy = mass(g constant = 9.8 m/s2) height
=100kg (9.8m/s2) (40m)
P.E. = 39200 Joules

value of g = 9.8m/s2 but in other textbook they use 10m/s2 to make the computation easy but take note the standard value of g is 9.8m/s2

2009-05-04 20:29:10 by precious jewel

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Fade margin is a very important calculation of microwave antenna.I want the equation/formula of calculating the fade margin.

fade margin is not a property of an antenna. fade margin is based on the link power budget. You have to consider the transmitter TPO, the feedline losses, the antenna gain, the path losses, any fresnel zone interference, the receive antenna gain and its feedline loss. This will give a receiver level. The headroom of this level compared to the minimum required is the fade margin. The fade margin is a figure of merit for the link as it reflects on the reliability of the connection. To improve fade margin you can, increase TPO, use higher gain tx or receive antenna, raise the tower height (possibly), or use a more sensitive receiver.

2008-03-08 02:31:09 by shamimnurrahman_dhaka

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Off the shelf licensed gear can get you 30 miles.
Unlicensed WiFi may have other users in the path but in clear space can go a few miles with the proper antennas and/or amplifiers.

2009-01-19 15:32:04 by rbadis112

P.E = mgh (m- mass, g- acceleration due to gravity, h=height)
P.E. = 100 kg x 9.81 m/s2 x 40 m
P.E. = 39240 kg m2/s2 (unit read as kilogram meter squared per second squared)
or use J (joule) or KJ as a unit

2009-03-05 09:22:56 by rhyleigh