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Performance of the
Dual Vertical Array
can noticeably decrease if metal structures radiating even
small amounts of noise or signals are within 1/2-wavelength of the array.
Note:
The Dual Vertical Array system should be separated from transmitting or other
antennas and structures (particularly metal) by at least 1/2- wavelength. Less
separation may cause significant pattern distortion and the introduction of re-
radiated noise into the system. This becomes apparent as reduced front-to-rear
directivity in one or more directions or a higher noise level.
With so many variables involved, there is no optimum or minimum spacing for effects on pattern.
The best practice is to install the array as far as possible from tall conductors or noise sources, or
place potential problems in less frequently used directions. For best pattern, space the system as far
as possible from conductors that might be noise sources or re-radiate unwanted signals. One
wavelength or more is generally ideal, although adequate performance generally occurring at closer
spacing, with one-half wavelength minimum recommended.
Radial System Information
The use of a radial system is a key requirement for a high performance dual phased monoband
vertical antenna system. With any vertical antenna, the radials are the second half of the antenna.
The radials contribute to the radiation efficiency of the entire phased vertical antenna system.
Using an optional patented
DXE-RADP-3
Radial Plate greatly simplifies mounting radial wires in a
vertical installation. The
DXE-RADP-3
stainless steel Radial Plate contains enough stainless
hardware sets to attach 20 radials. Additional 20 set radial connection hardware kits
DXE-RADP-
HW1K
are available from DX Engineering.
DXE-RADW
- Radial Wire Kits and Components
contain everything you need to make your own
radials, including steel or biodegradable lawn staples to hold the wire down, are also available.
The best way to connect the feedline to the radial plate and vertical feed point is to use an optional
DXE-FDFB-KIT
SecureMount™ bulkhead connector with the
DXE-FP-WIRE-P
Feedpoint
Connection Assembly.
A
DXE-SSVC-2P
V-Clamp is needed to secure the radial plate to the 2” OD vertical monoband
antenna mounting pipe.
The radial plate must be mounted to the vertical antenna’s mounting pipe prior to installing the
vertical element or antenna. It should be as close to the ground as possible, while still allowing
access to the radial wire hardware for tightening. A one inch ground clearance is adequate.
