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  • Author Author: pchan
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Antenna Technology Quiz

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Antenna Quiz

Antenna Quiz

Score 100% on our Antenna Technology Quiz, sponsored by Molex, then rate the document and leave your feedback as a comment to earn this badge.

The Antenna Technology Quiz will test your knowledge of antenna technology, concepts, theory and practice. How much do you REALLY know about antennas? Take our antenna quiz to test your knowledge.  To earn the Antenna Quiz Badge, score 100% on the quiz, rate this document, and leave your feedback on the quiz as a comment. 

                                         

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  • I have a few concerns with the quiz. There is a lot of information that is questionable and blanket statements that are incorrect. It is also of note that antennas do not support protocols but instead support bands of operation where those protocols are commonly used. Protocols are also not inherently frequency locked.

  • in reply to alex.colpitts

    Alex,

     

    Thanks for your feedback. Could you name a question that you disagreed with?

     

    Randall Scasny

    -element14 team

  • in reply to rscasny

    My primary concern is the statements of antennas supporting specific protocols. Antennas are agnostic of protocol. Protocols are agnostic of frequency. That being said, standards will have operating frequencies specified like LTE with its various bands. (Questions 9, 20, 25)

     

    Question 11 concerns me for the already stated reason of antennas not supporting protocol but also for reasons relating to 5G. The question assumes that 5G only exists in the context of massive MIMO mm-wave. The objective of 5G is not just packing more antennas at a higher frequency into a single unit. It should also be noted that antenna design and placement is also agnostic of protocol.

     

    Question 13 does not include units on directivity. This makes the question ambiguous. Is it 1.5 dB or 1.5? Indication of no units should be included for clarity if that is the case. Question 14 should also include units to remove ambiguity.

     

    Question 21 assumes that the dipole length is fixed, Once the dipole length starts to increase it will no longer look like a donut.

     

    From the phrasing of question 23 it leads me to believe that the beamwidth of an antenna is symmetric. The antenna beamwidth is commonly defined in terms of 3dB, 10 dB, and first null beamwidth. The first null beamwidth is no longer on the main lobe. It would better to phrase the question in terms of amplitude since 'identical points' implies some level of symmetry.

     

    I also have issues with the typos since technically question 4 has two correct answers.

  • in reply to alex.colpitts

    Alex,

     

    Thank you for the detailed comments. I have the day off today, so it will take me until Monday to respond to all of your concerns.

     

    But let me respond to question 20.

     

    20) From the list below, which communication protocol is not supported by the Molex 206866-3000 combination antenna?

        4G

        GPS

        Wi-Fi

        Thread

        All of the above

     

    This question came out of the datasheet: https://www.molex.com/webdocs/datasheets/pdf/en-us/2068663000_ANTENNAS.pdf

     

    From the datasheet:

     

    Protocol: BT, Cellular, GPS, Wi-Fi

     

    When I get back on Monday, I'll contact the manufacturer (Molex) with your comments.

     

    Have a good weekend.

     

    Randall Scasny

    -element14

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