Array Solutions Four Square User Manual Download Page 11 | Manualshive

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Array Solutions Four Square Controller

11

www.arraysolutions.com

Array Solutions

Ofc: 972 203 2008

350 Gloria Rd.

Fax: 972 203 8811

Sunnyvale, TX 75182

Quadrature Fed Plots

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Summary of Contents for Four Square

Page 1: ...ure 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...

Page 2: ...e 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...

Page 3: ...lay Phase Line In and Out These are the two connectors for the 180 degree phase line It creates the 180 degree phase delay to the front element of the array Antenna Ports J4 to J7 These are the output...

Page 4: ...r wavelength antenna feed lines Make sure the delay line is exactly 180 degrees on your favorite operating portion of the band Be sure to weather proof the connectors There is a ground lug on the side...

Page 5: ...to adjust C1 If you need more capacitance you may need to try adding a capacitor by touching it from the input connector side of the coil to ground If the SWR goes higher you know you must remove cap...

Page 6: ...ks on 8 blocks Each block vertical line is 45 degrees of phase shift and each grid line inside will be 9 degrees of phase shift You can see that the lagging sine wave for antenna 2 is adjusted to be a...

Page 7: ...to tweak it in very well with the vacuum cap and coil tap and achieve a very low VSWR Turn the array by switching the directions with your controller and verify VSWR is relatively stable It may vary...

Page 8: ...ystem 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 If it is a mobile unit adjust the output of the ra...

Page 9: ...the required 90 degrees phase shift was developed by Lewallen and we refer to it as in ON4UN s book as the Lewallen feed method Optimized Feeding This is probably why you purchased this unit Using a...

Page 10: ...r 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 Remember this is normalize...

Page 11: ...Array Solutions Four Square Controller 11 www arraysolutions com Array Solutions Ofc 972 203 2008 350 Gloria Rd Fax 972 203 8811 Sunnyvale TX 75182 Quadrature Fed Plots...

Page 12: ...1 perfect match No dump load Gain 5 5 dB over single vertical 6 16 dB optimized see theory Directions 4 directions with an additional Omni directional feature Electronic phasing LC network and phase...

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