Direction of the strongest transmitted signal is from the reflector toward the director. Spacing is on the antenna bar holding the elements, with equidistant spacing from each of the outside elements to the driven element. As general information, the director is the shortest element, the driven element is the middle element (in a 3 element beam) and the reflector is the longest element. This antenna configuration provides moderate gain and directivity, making it suitable for point-to-point communication and direction-finding applications with a reasonably narrow beamwidth. The lengths of these elements are designed based on the desired operating frequency. To optimize the antenna for a frequency RANGE, do the calculations twice, once for the low end of the range and once for the high end then average the two and plan to adjust the VSWR on both ends of the range as needed. Spread the loveA 4-element Yagi antenna typically consists of a driven element, a reflector, and two directors. Enter the desired frequency then click on Calculate and the optimum values for that combination will be displayed in feet, inches and fractions of inches, and in meters. 11-meter Yagi 5-element at 80 ft (11m) The 5 element mono-band Yagi antenna series have been designed keeping in mind the requirements of an avid DXer. This calculator is designed to give the critical information of a particular beam antenna, in this case a three element Yagi, for the frequency chosen. This calculator requires the use of Javascript enabled and capable browsers.
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