What's That Infrastructure? (Ep. 5 - Wireless Telecommunications) - YouTube

In today’s increasingly-connected world, the creation, distribution, and consumption

of information has become a major part of our lives, and telecommunications infrastructure

serves as the backbone of our information society.

From the telegraph and telephone wire to the cable and fiber optic lines, we’re always

working to find new ways to communicate over long distances, but not every signal travels

through a wire.

Today we’re talking about wireless telecommunications.

I’m Grady and this is What’s that Infrastructure, where we divulge and discover the constructed

world around us.

You can’t talk about telecommunications without mentioning radio.

Jerry took lots of pictures of the infrastructure in Ethiopia when he travelled there to adopt

his son, including this cool photo of radio transmitter towers and a wild mess of guy

wires used to hold them all up.

One of my long time fans, Luto, sent in these photos of the remnants of radio transmitting

antennas in Vienna.

These transmitters were built by the U.S. after World War 2 to strengthen their radio

program in Austria known as red-white-red, and you can still see the mast anchors if

you visit the parks in Wilhelminenberg.

Here’s another piece of history sent in by Sidarth in Indiana.

These are horn-reflector antennas used in the AT&T long lines network.

These microwave relays cut the costs of long-distance communications dramatically compared wired

systems and were used extensively starting in the 50s.

Even though many of the towers were built to withstand a nuclear blast, fewer and fewer

remain as our demand for higher capacity communications infrastructure increases.

Luckily, there is a ton of information online dedicated to remembering the awesome feat

of engineering that was the long lines microwave radio network.

Shravan sent in these photos of helical antennas from the radio telescope on the small island

nation of Mauritius.

These antennas collect radio waves from astronomical sources like planets, stars, and galaxies.

Since these waves are fairly weak, radio telescopes usually require very large antennas, and the

one in Mauritius is no different.

The main arm is over 2 kilometers long with more than a thousand of these helical antennas.

On the other end of the size spectrum, Ben sent in this photo of a small microwave antenna

on a traffic signal.

These antennas carry line of sight communications to other signals or to a centralized traffic

management system These systems are a major step up from simple timers, allowing traffic

signals to respond to changing conditions in real time.

Jacob from Mississippi did an internship with a telecommunications company and shared some

great photos from his experience.

Cellular networks are named as such because each transceiver serves a certain area known

as a cell.

Nearly everyone uses a cell phone these days, not only to make calls but also to browse

the web.

You may even be watching this very video on your phone, and if you are, can I just say

thank you for spending your hard earned megabytes to support this channel.

To manage the ever-increasing demand for wireless data, telcom companies continue to expand

their cellular infrastructure.

It seems like just about anywhere you look, cell phone antennas are popping up.

Eric from Pennsylvania sent in this photo of a small-cell antenna on top of a utility

pole.

And Dave from Maryland sent in a photo of a similar, but much larger antenna on residential

apartment building Finally, Daniel from Australia sent in a photo of something that’s become

very popular: an array of cellular network antennas along the parapet of a commercial

building.

Richard’s family has operates a Wireless Internet Service Provider or WISP in Oklahoma.

WISPs allow coverage of rural areas where wired connections wouldn’t be feasible by

creating individual access points which can serve many customers.

In fact, infrastructure just like this is helping to reduce the digital gap in developing

countries by providing broader low-cost access to the internet.

Finally, following tradition, a photo that’s got me stumped.

This one comes from Guillaume in Quebec.

It may just be an architectural feature, but I have a suspicion these yellow things are

serving a purpose.

I’m just not sure what it is.

If you know, put it in the comments down below.

Thanks again to everyone who sent in photos.

These emails are not slowing down.

This has been a lot of fun so far, and I’ve got a backlog of topics for future videos.

If you have a picture you’d like to share, send it in to [email protected].

Make sure you mention that it’s okay for me to use in a video, and include your mailing

address.

Because if I use your photo in a video, I’ll send you a Practical Engineering sticker.

Click that like button and subscribe to the channel if you enjoyed the video.

Thank you for watching, and let me know what you think.