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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
 Have
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
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