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Need RDF Yagi alternative
This isn't strictly a Ham question, but I hope you all can help me anyway.
I am using small transmitters in the 166-167 mhz range in some Box Turtle research I am doing. My RDF antenna is a 3 element Yagi designed via Yagicad 4.1 which works pretty well. It has 48db front/back and about 90 degrees beamwidth in the H pattern. This works well for initial locating......usually starting 1500 to 2000 feet from my transmitter, but the closer I get, the more inaccurate it becomes. What kind of antenna design could I switch to when I get to close range that would have a narrower beam so I could pinpint my target? It would be nice to have something smaller than my 35" x 21" yagi for close in work, but the beam width is the primary concern. Yagicad doesn't let me design solely on beam width (at least I haven't figured out how) so is there another way to go on this?? Thanks Jim |
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