WL1837MODCOM8I: WL1837 Matching

Yunus Karaborek

Part Number: WL1837MODCOM8I
Other Parts Discussed in Thread: WL1837

Dear Team

One of my customer has below question:

In WL1837 board, there are LC matching circuits on the board SMD antennas. But for the optional micro-coax connectors (which were disabled by default; but we enabled them by turning two jumper resistors) there are no LC matching circuit. They are directly connected to the module; as can be seen in the attached picture. Is the LC circuit only needed for on board SMD antennas? Should we also put LC circuit to microcoax connectors? (In our system we are using microcoax connectors to carry the signal to an external antenna.)

Could you please help?

Best regards

Yunus

over 5 years ago

0 Chen Loewy over 5 years ago

TI__Expert 5285 points

Hello Yunus,

You can use a regular UFL connector (as the one you show in the picture)
I will check with a HW expert to see if any additional connection is needed.

Chen

0 Rizwan Murji over 5 years ago in reply to Chen Loewy

TI__Genius 12260 points

Hi Yunus,

My apologies for the delay. In designing your own board we do recommend that you use an LC option for matching. If it is not required yo can simply replace the series component with a zero ohm resistor. For our COM8Board, since the intent is to connect to test equipment and not an external antenna, no additional matching was required.

I hope this helps.

Thanks,
Riz

0 Yunus Karaborek over 5 years ago in reply to Rizwan Murji

TI__Expert 7450 points

Many thanks Riz. Happy New Year!

0 Yunus Karaborek over 5 years ago in reply to Rizwan Murji

TI__Expert 7450 points

Many thanks Riz. Happy New Year

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WL1837MODCOM8I: WL1837 Matching