Our Blog Page Page Icon  

Our Blog.

Humans writing words that span topics from support to design to content management and beyond!


Wi-Fi Part 2

To understand why wavelength and bandwidth are linked we should look at how data is actually transferred over the air. Thinking back to the days of Morse code we know that all we needed to do was disrupt the signal and someone on the other end would figure out what was being said. What about sending audio over the air? Now that we need to send more data we have to start modifying different parts of the signal. This is done through Amplitude Modulation, Frequency Modulation (and lesser known Phase Modulation). We more typically refer to these by their acronyms AM and FM.


The EM spectrum moves in waves. It has peaks and valleys. We can alter the height of the peaks (amplitude), the distance between them (frequency) or add a delay or lag to each individual wave (phase). 

Amplitude and Frequency Modulation


Phase Modulation

These are great for sending an analogue signal (like audio from a radio station to your car stereo) but what about sending digital information like Wi-Fi? Digital information is stored in binary as a series of ones and zeros, we can use these existing methods like AM by defining what height of wave translates to a one and what translates to a zero. Unfortunately we run into the aforementioned issue of bandwidth. Sending digital information requires significantly more bandwidth than is available in just these methods. There are many more complex methods that go into sending data over Wi-Fi but I won’t get into them here.


Unfortunately this is where the low wavelength we've been using hits the bandwidth wall. Because the waves are so long we can't send enough ones and zeros quickly enough to be useful. Now we need to shorten the wavelength and crank up the frequency. Older Wi-Fi versions used a frequency of 2.4 Gigahertz, mainly because it was unregulated. Using 2.4 GHz meant sharing a frequency that many other devices we're already using (like your microwave oven) and ended up being too cluttered with other signals that it frequently caused an unreliable connection.


Current versions of Wi-Fi use a frequency of 5 Gigahertz to move away from the cluttered overused 2.4GHz frequency. This meant a cleaner signal and a big boost in available bandwidth. Unfortunately shortening the wavelength again meant sacrificing its ability to pass through walls and effectively shortening the distance the signal can travel indoors.

view all comments (1) add a comment
Subscribe to this Blog Like on Facebook Tweet this! Share on Google+ Share on LinkedIn


Christine Alon
October 20, 2016
show Christine's posts
Shauna Ramsaroop
October 13, 2016
show Shauna's posts
Todd Hannigan
October 6, 2016
show Todd's posts
Jillian McBurney
October 3, 2016
show Jillian's posts
Sean Sanderson
September 29, 2016
show Sean's posts
Rob Matlow
September 26, 2016
show Rob's posts
Sean McParland
September 19, 2016
show Sean's posts
Ryan Covert
August 4, 2016
show Ryan's posts

Latest Posts

Show All Recent Posts



Everything Content Management Technology Design Holidays Off Topic Support New Features Personal Gaming New Clients SEO REM News Project Management Account Management Training
Home Our Work Our Team Our Services WebWiz@rd™ Support Contact Us  


72 St Leger Street, Unit 2

Kitchener, ON, N2H 6R4

P: 519 884 4111 | TF: 1 866 754 4111 sales@remwebsolutions.com


Client Centre Login


Accessibility & Compliance Privacy Policy
© Copyright 2016 REM Web Solutions. All Rights Reserved.
Web Design and Content Management by REM Web Solutions.
FaceBook Twitter Linked In YouTube Google Plus our blog