February 2003
Intermediate to advanced
352 pages
8h 35m
English
Content preview from Deploying License-Free Wireless Wide-Area NetworksBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Wireless Wavelength
It is important to be able to visualize the physical size of a wireless signal because the physical size of each signal determines how that signal interacts with its environment and how well it is propagated from antenna to antenna within the wireless network. The signal's physical size also determines how large or how small the antennas that transmit and receive the signal must be; the smaller the signal size, the smaller the antenna.
Figure 2-2 shows two wireless signals on two different frequencies—2.45 GHz and 5.775 GHz. All wireless signals travel through the air at the same speed. That speed is the speed of light, which is 186,000 miles per second (300,000,000 meters per second). The distance that a radio signal travels ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.