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WL1807MOD: Requirements for an external antenna

Yuto Hori
Prodigy 390 points
Part Number: WL1807MOD

Hi team,

Customer have a question about WL1807MODGIMOCR.

The datasheet says this device is certified with FCC and has FCC ID. Are there any requirements(antenna gaine, etc.) for an external antenna to use this certification ID?

  • 0
    TI__Mastermind 44520 points

    Hey Yuto,

    Yes, we have an approved list antennas which you can find listed in the certification reports for this module. Let me know if you have any trouble finding the table.

  • 0 in reply to Dylan Hubbard
    TI__Prodigy 390 points

    Thank you for your answering

    I also have the following additional questions from customer. Could you answer them?

    • For WLAN 11n, HT20(, 40, 80, etc.) are used or not? Where can we find that information?
    • For WLAN 5GHz, what are the supported frequencies(W52/53/W56/W58, etc.)?  (with or without DFS)
    • Is this device for Master or Slave?

    Your support is highly appreciated.

  • 0 in reply to Yuto Hori
    TI__Mastermind 44520 points

    Hi Yuto,

    You can actually find all this info in the data sheet - I recommend looking there first.

    Can you clarify the third bullet point?

  • 0 in reply to Dylan Hubbard
    TI__Prodigy 390 points

    Sorry for the additional question.

    10 certified antennas are listed in "FA741320_R01_RF Exposure_Texas_WL18MODGB.pdf" in the folder "WL18MODGB_Cert_Reports_5_20_00_00" in the folder FCC.

    When using antennas other than those listed, if the peak gain is lower than the 3.2dBi listed, can the Z64-WL18SBMOD with the FCC certification ID be used without testing? Or will another certification test be required even if it is lower than 3.2dBi?

    Is it necessary to use one of the 10 listed antennas in the document in order to use WL1807 as an FCC certified product without testing?

  • 0 in reply to Yuto Hori
    TI__Mastermind 44520 points

    Hi Yuto,

    Yes if the peak gain is lower than the 3.2 dBi listed in the report, then that antenna should be fine. This would allow them to leverage the module certification.

  • 0 in reply to Dylan Hubbard
    TI__Prodigy 390 points

    Thank you for your response,

    Regarding the 5GHz bandwidth, antennas between 2dBi and 4.5dBi are listed in the certification.

    If the peak gain is lower than 4.5 dBi, can antennas not listed be used without testing?

  • 0 in reply to Yuto Hori
    TI__Mastermind 44520 points

    Hi Yuto,

    For FCC and IC in order to use an antenna that is not on the list there are 3 rules that must be met:

    1) The antenna must be of one of the types listed on our certification ( for example, whip or PCB...)
    2) The peak gain must be less than or equal to the max gain on our certification)
    3) the out of band performance must be similar.

    item 3 is the grey area that we always recommend the customer to check with their test house.

    For CE, its similar to FCC and IC, but since its self declaration it's usually not an issue.

    For Japan, the exact antenna needs to be on the certification. IF they do need to add an antenna for Japan we have a process in place for this already.

    For FCC and IC if the certification house determines that they must do some additional testing (C2PC) we also have a process for this where they can benefit from our data and do delta testing to minimize the cost and time.