Products & Product Reviews

Why a Three Antenna Phasing System Can Be a DX and Contesting Game-Changer

Say you’re a contester who’s serious about winning, or a DXer truly trying to “work the world,” even the rarest of the rare. You’ve got a killer setup–three high-quality stacked monoband directional Yagis, plus you bring years of operating experience to the shack.

Have you done everything in your power to dominate the airwaves? Not quite, especially when pattern null may be affecting your system’s receive capabilities, and your equipment doesn’t allow you to take more precise command to remedy the problem. That’s where DX Engineering’s PS-3B PRO-STACK Three Antenna Phasing System can make a major difference.

What is it?

The PS-3B-P PRO-STACK consists of a relay unit (DXE-PS-3B) and control console (DXE-EC-PS3) that enable you to achieve exceptional array control and performance with three identical Yagi or log periodic directional antennas, or with vertical antennas in a phased array. This frequency-independent broadband phasing device operates with three antennas on any bands, from 160 through 10 meters. Select from 12 combinations of in-phase and out-of-phase for pattern and null steering.

Why do you need it?

The PS-3B-P PRO-STACK lets you move debilitating pattern nulls (a weaker spot in the radiation pattern) away from signal arrival angles. Signals arrive at your antenna system from different azimuth directions and different elevation angles. Adding a stacking phasing system to a rotational array allows you to steer the pattern of the antenna array in two planes, azimuth and elevation, and to move the major lobe (the largest area of gain in a radiation pattern) and the nulls.

This is accomplished by switching between three identical antennas that are properly spaced for phasing, as well as changing the phase relationship between the antennas to effect changes in the null positions of their elevation patterns.

Why is it better than previous stacked systems?

Older systems activated or disabled specific antennas in the stack to change pattern. With the Pro-Stack system, gain remains higher when all antennas are driven and phase is changed. Plus, this system allows phase inversion, as well as the ability to switch any single antenna out of the array.

Another advantage

This relay unit contains a broad-bandwidth high-power 2:1 impedance matching transformer. This eliminates common requirements of using mixtures of 75-ohm and 50-ohm phasing or delay cables for impedance matching.

Click here for more details on the PRO-STACK Three Antenna Phasing System. Also check out the DX Engineering PRO-STACK Broadband Two Antenna Phasing System for two identical Yagi, log periodic, or vertical antennas in a phased arrangement.

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