5
System Overview
The
DXE-RFS-2P
is an advanced four square receiving system that uses four symmetrically spaced
elements to provide switching for a 4-direction receiving antenna system. This unique system uses
time delay phasing rather than the single band phase shifting used in traditional four squares. When
used with active receive elements, this time delay phasing scheme provides the correct phase
relationship across a wide frequency range and useful front-to-rear ratio (F/R) response over octaves
of bandwidth.
This system uses directionally-optimized time delays to produce wider and deeper rear nulls. Wide
null areas and a narrow main lobe greatly reduce noise and undesirable signals.
The system is more reliable than a conventional transmitting four square system in receiving
applications. Most transmitting four squares use large, exposed open-frame relays which can
become contaminated or corroded. This system uses sealed relays; contact size is optimized for
receiving applications.
Features
Advantages of the
DXE-RFS-2P
Receive Four Square Antenna System over other receiving arrays
include:
•
Seamless stainless steel
RFS-2
enclosure, for enhanced weather resistance
•
Reduced susceptibility to high angle signals compared to EWE, Flag, Pennant, and K9AY
antennas
•
Excellent directivity in a small space for better signal-to-noise ratio
•
Switching of four 90 degree spaced directions
•
Directivity over a very wide frequency range using DX Engineering’s Active Receive
Antennas
•
Requires less space than a Beverage antenna. Active elements need only a minimal ground
system
•
Using active elements, system allows close proximity to transmit antennas using
transmit/receive sequencer
•
Enhanced relay contact reliability
