![2020 Extra Class study guide: E9B – Antenna patterns and design: E and H plane patterns; gain as a function of pattern; antenna modeling - KB6NU's Ham Radio Blog 2020 Extra Class study guide: E9B – Antenna patterns and design: E and H plane patterns; gain as a function of pattern; antenna modeling - KB6NU's Ham Radio Blog](https://www.kb6nu.com/wp-content/uploads/2012/11/e9-1.jpg)
2020 Extra Class study guide: E9B – Antenna patterns and design: E and H plane patterns; gain as a function of pattern; antenna modeling - KB6NU's Ham Radio Blog
![Figure 3 from Theory underlying measurement of AOA with a rotating directional antenna | Semantic Scholar Figure 3 from Theory underlying measurement of AOA with a rotating directional antenna | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/e24fef52fd9769fa040b302ec5e8a314cdc8c648/6-Figure3-1.png)
Figure 3 from Theory underlying measurement of AOA with a rotating directional antenna | Semantic Scholar
![rf - Recapturing side and back lobe radiation from a directional antenna - Electrical Engineering Stack Exchange rf - Recapturing side and back lobe radiation from a directional antenna - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/AxKKe.jpg)