Patch Antenna, the same diagram from Cisco Whitepaper. (Figure 7. Single Patch Antenna with 3D Radiation Pattern, Azimuth Plane Pattern and Elevation Plane Pattern)
https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/prod_white_paper0900aecd806a1a3e.html
You can see on this
https://www.cisco.com/c/en/us/td/docs/routers/connectedgrid/antennas/installing-combined/b-cisco-industrial-routers-and-industrial-wireless-access-points-antenna-guide/m-ant-wpan-y-out-n.html
According to the whitepaper in the reference, B is correct.
Fun fact is that according to the official exam guide it should be a Yagi, but apparantly they mixed up the pictures in the guide which makes it confusing.
Nothing seems to be mixed up in my encor book.. Page 535 mentions Figure 18-23 which is on page 536. You can compare it to the patch antenna patterns from Figure 18-20 (535)
Book shows nearly same pattern style in azimuth and elevation for patch and yagi, with patch being more oval with minimal tail.
In this test question, they seem to be mixing pattern style. Yagi also seemed plausible
Then again, Yagi pattern seems more narrow focused.
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