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For a
more comprehensive article on the design, analysis and
construction of this antenna, please see The
Skew-Planar Wheel Antenna - Revisited, by VE3BYT with VE3KL. |
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This antenna, constructed by VE3BYT, was built
for the beacon VE3WCC on 903.370 MHz in Ottawa, Canada.
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This example by
VE3BYT is built for
440 MHz.
Elements are 1/8 in. diameter bronze rod.
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Following
attachment of the coaxial feedline, the connection and the
center hub are coated for waterproofing.
In the 903 MHz antenna, the lower ends of the elements are
soldered into a copper pipe cap.
In the 440 MHz version the elements terminate in a (soldered
together) stack of lugs. |
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The Skew-Planar Antenna at
2.4 GHz
constructed on a female BNC connector by
Clare Fowler,
VE3NPC.
As shown here, the male connector and bolt are for support for
the photo only
and the pen is to show the scale of the antenna.
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This
Skew-Planar Wheel Antenna at 1296 MHz was constructed by
Peter Jago, VA3PJ, using an inverted female SMA connector.
The antenna is mounted on
rigid coaxial cable.
This one is
built for left-hand circular polarization.
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David Conn, VE3KL, has done an extensive analysis
of the Skew-Planar antenna.
It produces circular polarization, and has an omnidirectional, low
pattern.
The optimum separation for stacking two antennas is 5/8 wavelength.
N.B.
Testing and
analysis has
shown that the elements should be
slightly more than one wavelength long ( WL x 1.0443 ).
The factors to use are: 31329
/ F (centimeters)
or 12334 / F (inches) long.
This antenna is broad in frequency response. In practice, element
lengths are not supercritical.
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Element lengths for some bands |
|
Frequency - MHz |
Length - cm |
Length - inches |
| 223.5 |
140.2 |
55.19 |
| 440 |
71.2 |
28.03 |
| 915 |
34.2 |
13.48 |
| 1290 |
24.3 |
9.56 |
| 2400 |
13.1 |
5.14 |
Graham Ide VE3BYT
ve3byt@rac.ca
Details from an old (1964) ARRL Antenna
Book
showing construction for the 144 MHz band.
(Note the comment above on Element Length)
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