The input or generator end of the line would be that end connected to the device for measurement of the impedance. Whether the antenna is intended purely for transmission of energy, or purely for reception makes no difference the antenna is still the terminating or load impedance on the line as far as these measurements are concerned. In this case, the antenna is connected to the far end of the line and becomes the load for the line. The electrical length of the feed line must be known, and the impedance value at the input end of the line must be determined through measurement. To determine an actual antenna impedance from the Smith Chart, the procedure is similar. Home - Techniek - Electronica - Radiotechniek - Radio amateur bladen - QST - Smith-chart calculations for the radio amateur 2
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