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 LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor RF Cafe Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave RF Cafe Software Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!
Windfreak Technologies Frequency Synthesizers - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe

Amplifier Solutions Corporation (ASC) - RF Cafe

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

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

DC-70 GHz RF Cables - RF Cafe

Holloway Electronics Corp. Expo Antenna
October 1955 Radio & Television News

October 1955 Radio & TV News
October 1955 Radio & Television News Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919-1959. All copyrights hereby acknowledged.

Although I do not recall seeing a lot (none, actually) of antennas constructed in the style of this Holloway Electronics "Expo" model, I did a quick Web search to try finding contemporary products exploiting the concept. The "Expo" uses a set of exponentially curved elements to maintain a more constant separation distance between individual components in an effort to provide better gain across the entire VHF / UHF television broadcast bands. It seems like a really good idea on paper (no computers back in the day), but evidently in practice using an exponent of "1" (i.e., linear like all the rest) is good enough for acceptable reception. Any noticeable performance increase over standard antennas was probably gotten by virtue of phased stacking of two or more, as shown in the advertisement picture.

Holloway Electronics Corp. Expo Antenna Ad

Holloway Electronics Corp. Expo Antenna, October 1955 Radio & Television News - RF CafeHave you ever seen or heard of the Exponential Antenna? You have not, for until now it was unknown to the engineering world.

What is Expo?

Expo, the exponential antenna, represents an historical technical advance that eliminates the crippling frequency limitations of all known antennas by the use of exponentially curved elements. The ultimate in antenna design! One antenna for all 82 channels with gains progressively increasing with increase of frequency. This principle recently discovered* is the basic answer to the limited bandwidth problem. There is no need for multiple antenna installations or other expedients to gain slightly wider bandwidth operation.

Higher gains

- one antenna

- one transmission line

- one installation.

That is Expo.

Servicemen will appreciate the ease and speed of installing Expo:

Occupies less space - Pleasing appearance - Supreme performance. Its performance sells it for you.

Will you be among the first to see it perform? Consult your distributor, or for further information, write:

Here is an antenna that is insensitive to frequency variations - except that gain increases as you go higher in the spectrum, reaching astounding gains in the upper VHF and throughout the UHF regions. Where wide bandwidth operation is necessary as in T.V., Expo ushers in a new era in antenna design, wiping out the frequency restrictions of straight element antennas.

Expo comes 1, 2, and 4 bays in the standard and deluxe models. The standard models use a single parasitic reflector while the deluxe models employ a screen-type reflector for areas in which the ultimate back attenuation and increased form gain is desired.

Holloway Electronics Corp.

Fort Lauderdale, Florida

* Patent applied for.

 

 

Posted October 14, 2020

DC-70 GHz RF Cables - RF Cafe
Cafe Press

Axiom Test Equipment - RF Cafe

RF Cascade Workbook 2018 by RF Cafe