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Array Solutions Four Square User Manual

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Array Solutions Four Square Controller
1
Array Solutions
Four Square Array Controller User's Guide
Figure 1: Array Solutions Four Square Array Steering System
Note: A 180 degree phasing line is included, but not shown
Congratulations!
You have selected one of the finest phased array steering systems made. We have under-rated
the power capability of this system to assure the user high reliability under heavy use such as in a
48 hour radio contest. Please contact us if you have any questions about the product and please
send a picture and description of your station showing the control system installed and in use.
The Four Square Array system has two components: (see Figure 1 above) a relay box that will be
mounted midway between the four verticals and a control box that is connected with a 5-wire
control cable inside the operating room. With this system you will be able to beam in 4 directions
and also take advantage of the OMNI mode for domestic use.
The system is available in standard quadrature feed and an optimized feed version.
www.arraysolutions.com
Array Solutions
Ofc: 972 203 2008
350 Gloria Rd.
Fax: 972 203 8811
Sunnyvale, TX 75182

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Summary of Contents for Array Solutions Four Square

  • Page 1 The Four Square Array system has two components: (see Figure 1 above) a relay box that will be mounted midway between the four verticals and a control box that is connected with a 5-wire control cable inside the operating room.

  • Page 2: Lightning Protection

    Table 1 Lightning Protection: Array Solutions recommends the use of proper lightning and surge protection at the station end for both the control and RF cables. MOV protection is included in the Four- Square relay box. Devices such as the I.C.E. model 348 Transient Suppressor and 303U Coaxial Impulse Suppressor / Arrestor products that Array Solutions can provide are very effective.
  • Page 3 Array Solutions Four Square Controller Figure 2. Figure 2 description: (Please also refer to the schematic received with your System) J1 Feed line RF connector is where your 50 ohm feed line connects. The area marked HV capacitor bank – C1 is for placement of HV RF capacitors in parallel with the vacuum cap.

  • Page 4: Setting Up The System

    Devoldere, ON4UN and is entitled “Low-Band DXing”. If you do not have a copy of this book, Array Solutions recommends that you obtain a copy of it to learn more about these and other types of antenna systems. It is available from the ARRL bookstore.
  • Page 5 Array Solutions Four Square Controller VSWR and Matching Tuning this unit requires a good Oscilloscope or other instrument that can measure phase and magnitude. A scope is most useful and we recommend at least a 100-500 MHz scope for good accuracy.
  • Page 6 Array Solutions Four Square Controller Fourth: The L2, C2 -90 to-120 phase shift circuit should be tuned next. (L-network) Select the 1 default position of your controller switch. Place scope probes (channel 1) on J4, ANTENNA PORT 1, and trigger the scope on this signal.
  • Page 7 Array Solutions Four Square Controller C3 and L3 comprise the -224 degree network. They take the signal from the 180 degree delay line and add additional delay along with the ability to adjust the magnitude of the waveform. Adjust this waveform for the delay and magnitude your model required or approximately as below.
  • Page 8 Locate the source in one of the 4 directions of your array, and make sure it is loud enough to be 40-50 dB over S9 on a good receiver connected to your four square system. You can adjust its antenna length to achieve this signal strength. Just use a coil of wire in a VSWR analyzer and string it up in a tree or pole.

  • Page 9: Theory Of Operation

    The system consists of four verticals in a square separated by .25 WL (= side of the square) Quadrature Feeding The Array Solutions controller can be used to feed all 4 of these verticals in such a way as to accomplish a quadrature feed to each antenna. Quadrature means fed in 90 degree steps and with equal drive and current magnitude.
  • Page 10 Array Solutions Four Square Controller Your phase delays and magnitudes may differ. You must model the antenna to get this close. Later I will suggest a way to optimize the antenna over your ground conditions and mutual coupling conditions. See pattern plots below to view pattern differences using the same system, same ground but with the improved phasing angles.
  • Page 11 Array Solutions Four Square Controller Quadrature Fed Plots www.arraysolutions.com Array Solutions Ofc: 972 203 2008 350 Gloria Rd. Fax: 972 203 8811 Sunnyvale, TX 75182...

  • Page 12: Specifications

    Array Solutions Four Square Controller Optimized Fed Plots – More Gain and Front go Back Specifications Construction Corrosion resistant NEMA 4X enclosure, weather seals, Amphenol Teflon SO239s Power 5 KW CW / 10 KW PEP VSWR Adjustable for 1:1 perfect match – No dump load Gain 5.5 dB over single vertical 6.16 dB optimized see theory...

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