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4-Square Antenna in theory and practice - RemoteQTH.com
remoteqth.comgenerated by coaxial cables of appropriate length, impedance matching is done by λ/4-transformers. The principle is presented in Fig. 1.10. Fig. 1.11 shows the "harness" that is required for the proper phases and impedances in the array. The figures are taken from QST, March 1965.