Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Bittele Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol RF Superstore San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
Copper Mountain Technologies (VNA) - RF Cafe

World's Tallest Buildings <=> Highest Radio Masts
- RF Cafe Cool Pic -

Cool Pic Archive Pages

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |

These images have been chosen for their uniqueness. Subject matter ranges from historic events, to really cool phenomena in science and engineering, to relevant place, to ingenious contraptions, to interesting products (which now has its own dedicated Featured Product category).

When a structure is measured for an official height, it includes every part of the structure - including the antenna(s) and support mast(s) that is(are) almost always included at the very top. Take the current height record holder, the Burj Khalifa, in Dubai, for instance. The overall height of the structure including the antenna is 828 meters; however, the antenna is 207 meters tall, so the building itself is only 621 meters. As can be seen from the chart below, only two pure antennas (including support mast) are included in the world's tallest structures. Antennas are used for television, radio, data, and even optical transmission.

If you read Arthur C. Clarke's article in the October 1954 edition of Wireless World where he conceived of a geosynchronous satellite system to broadcast television signals rather than using a series of terrestrial towers, it is apparent why even using antennas at heights like the one on the Burj Khalifa would not even come close to providing coverage needed for the entire earth. The following table gives the line-of-sight*, including earth curvature, range for each antenna (assuming maximum specified height). With an earth circumference of 40,000 km, you would need nearly 700 towers just to provide continuous coverage along the equator. A few thousand would be required for global coverage. The logistics for construction, maintenance, and operation of such a network would be daunting... if not impossible. Imagine the aerial navigation that such an array would pose!

 

Name Location Height (AGL) LoS Range (km)
Burj Khalifa Dubai  828 m  119 
Warsaw Radio Tower Poland  646 m  105 
Tokyo Sky Tree Japan  634 m  104 
KVLY-TV  USA  629 m  103 
Guangzhou (Canton) Tower** China  600 m  101 
CN Tower  Canada  553 m  97 
Sears (Willis) Tower  USA  527 m  95 
Oriental Pearl Tower  China  468 m 89 
Empire State Building  USA  443 m  87 
Eiffel Tower  France  324 m  74 

 

   * Line-of-Sight Calculator

** "...we wanted to create a 'female' tower being complex, transparent, curvy and gracious."

 

Graph of World's Tallest Structures - Including Antennas - RF Cafe

Graph of World's Tallest Structures - Including Antennas

 

Well, this started out being about pictures of high antennas (i.e., Cool Pic), but it kind of evolved into a little more.

 

 

Posted July 11, 2011

Berkeley Nucleonics Corporation - RF Cafe
Rigol DSG5000 Microwave Generator - RF Cafe
RF Cascade Workbook 2018 by RF Cafe
Exodus Advanced Communications Best in Class RF Amplifier SSPAs
Noisecom

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free

 

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

AirplanesAndRockets.com