4 square antenna array pdf

The square is therefore oriented so that one diagonal points toward europe here in new england. The four square array gives added directivity and gain approximately 6 db gain and 1525 db fb and fires across the diagonals of the square. By using four of the k8ur vertical antennas spaced. Modifying the 4square array for improved fronttoback ratio.

The conventional antenna fires outa four square with eight directions of fire al christman, k3lc figure 2elevationplane radiation patterns for the four square array when firing neseswnw through the corners of the square solid trace, and when firing nesw through the sides of the square dashed trace. With proper phasing, directivity can be selected along the square s diagonals see fig 1. A switchable four element 80 meter phased array by fred collins, w1hkkw1cf, march 1965. What the array needs is 4 insulated vertical elements that are as near identical as possible. Four square vertical antenna phased array control system. The hiz antennas 4square receiving system utilizing shortened vertical. Feeding the antennas through feed lines that are 1 4 wave long or an odd multiple of a 1 4 wave long, will force the the. Comtek phased array switchboxes can be used with 2 or 4element vertical arrays.

Foursquare arrays two element phased arrays dx engineering. Figure 4 depicts a plan view of the modified system, which includes the. A 4 square array needs equals currents on each antenna to work properly. Building a lowband receiving 4square antenna hiz antennas. For array operation at 160 meters and below the elements should be 15 to 20 feet in length. The array main tains the low angle radiation char acteristic of a simple 1. Comtek phased array relay units used with 4 vertical elements. To meet the above requirement, in the present work an array with 16 elements configured in a. Compact 4 squares and other ways to get gain on 40, 80 and 160. There are likely as many ways to construct elements for a 4 square array, as there are people in the world.