4
System Overview
The
DXE-RFS-SYS-4P
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 producing 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-SYS-4P
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
Easier to deploy and maintain than a four direction Beverage antenna system
Using active elements, system allows close proximity to transmit antennas using
transmit/receive sequencer
Enhanced relay contact reliability
Low current DC powered control console allows system operation without AC power mains
This manual will describe the
DXE-RFS-SYS-4P
total system package in detail.
The DXE-RFS-SYS-4P is a sophisticated system that has critical control voltage
and three delay line connections.
Failure to make quality feedline or delay line connections might result in an array
that does not work or performs poorly.
