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A10192H Datasheet clarification on pinout and Feed vs. NC pins


The antenna selector suggested using an A10192H based on my board shape and antenna location.

1) This is a 3 pin antenna from all the pictures, but the datasheet says "9. Schematic symbol and Pin definition The circuit symbol for the antenna is shown below. The antenna has 5 pins with only two as functional. All other pins are for mechanical strength."   I'm going to assume this is just a copy paste error.

2) Section 9 table shows pins 1,2 as Feed pins and pin 3 as a mechanical NC pin.  However sections 11.2 and 14 show schematics where pin 2 is a NC pin not a feed pin.  Which is correct?  Is pin 1 the ONLY Feed pin?

3) The Bottom side drawing does NOT show which pads are which pin #.  Is the single pad on the left pin 3?  Is the pad above the single pad pin 1 or pin 2? 

4) Section 12.1 states "Where possible the antenna should be clear of ground from both sides,"  I assume that means left and right of the antenna.  Question: How about the layers UNDER the antenna?  Should all ground be removed?

I think a layout file of the A10192H Evaluation Board would probably answer most of my questions.  Is is possible to provide a layout?  

Thank You


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1 Answer

answered by

Hi Paul,

Here are my comments:

  1. Yes, this is an error on the datasheet there are only 3 pins.
  2. Pin 1 is the feeding pin so the transmission line will be connected to pin 1 only.
  3. The single pad is pin 3, the top pad is pin 2 and the bottom pad is pin 1.
  4. The Fusca antenna needs to be placed in the corner with minimum 2mm ground clearance on left/right side of the antenna depending which corner the antenna is implemented. The layers under the antenna + the 2mm clearance needs to be free of groundplane or metal. This is known as the clearance area.
I will also send you the layout file
Best regards,
Yu Kai Yeung

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Yu Kai Yeung

Antenna Engineer at Antenova Yu Kai is an antenna expert with over 10 years of experience in the design and testing of antennas. He has experience helping customers with certification testing, combined with his knowledge of RF measurement procedures.

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