7 elements 89MHz LFA Yagi
7 elements 107MHz OWA Yagi
7el 89MHz LFA Yagi
This design is based on this antenna: A 7 element LFA Yagi for 70MHz with a 6.89mtr boom.
I rescaled the values for low part of band 3 and simulated (with 4nec2) the result. Just for fun and to see I could manage this.
Bandwidth: 87,5 - 90,5MHz
|S1||215||1380||690||12mm; loop end 10mm|
|S2||520||1380||690||12mm; loop end 10mm|
First tests 2010-12-31
The first results. Adjusting the dipole loop is important. First I had a bad swr and a second even better dip around 93 MHz but with some tuning it became better.
I will improve this when wetter is better.
The antenna is lower in frequency than calculated.
Funny. I found the error and could more or less simulate it. Below the simulated swr graph with the loop error. It seams that the loop is a few centimeters to small.
Changed dipole loop
Here are pictures of the LFA yagi in action.
7 elements 107MHz Yagi OWA yagi antenna
Data and pictures of the enginering model.
Bandwidth: 104 - 108 MHz
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