QUESTION

asked ago by
Request Gerber File
I bought 2 types of Chip Antenna from your company

The two types of Chip Antenna are as follows ( SR4G053 / SR4C033)

I am trying to make a board using the antenna of your company that I purchased. Can I get a Gerber file for the antenna and the board?

I'm planning to use the CST tool, so if possible I would like to get a gerber file that I can import directly from CST.

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1 Answer

answered ago by
Hi Park,

We don't release gerbers for our antennas, it is company confidential. We may be able to help with the EVB gerber, but this is not a recommended stack up for a mixed mode PCB. Our EVK is 2 layer as it is for evaluation only. We strongly recommend a 4 layer minimum stack up. Footprint and data sheet are available from the download area, which should be enough to get you started on your layout.

We are always keen to engage with our customers as early as possible in their design process and would be happy to review your gerber, stack up and 3D files and advise you further.
Many Thanks

Steve
commented ago by

Thanks for your reply

 

But I have some questions about your answer

 

According to what you said, the layers of the PCB should be at least 4 layers. According to the information presented in the data sheet, it should be 3 layers in the order of Copper-Substrate-Copper. I would like to know what additional layers are needed

In addition, you said that Antenna's Gerber File is confidential. I was wondering if you could give me a Gerber Filer for the Board if it existed.

Lastly, if there is no separate Gerber File for the Board, I would like you to give me the EVB Gerber File.

 

Thanks

 

Park Tae Hee.

commented ago by

Hi Park,

Apologies, when I say 4 layer I mean four copper layers, see image below:

I have passed your details on to your regional representative who will be in touch soon and help to send you the files.

Many Thanks

Steve

commented ago by
Thank you for the reply

i got what you meant

And as you said, I will wait for a reply while additional files arrive.

But I have an additional question in your answer

I wonder if there is much difference in the result if copper is made with 1 layer instead of 4 layers

It seems that the DataSheet you provided does not say that copper must be made in 4 layers. Does this mean there is no big difference between 4 layers or 1 layer?

It is my first time drawing a PCB board, so I am asking this question because I think it will be difficult to draw a complex structure.
commented ago by
Hi Park,

Your question regarding 1 layer vs. 4 layers is an important question the requires a very detailed answer.  When you refer to one layer of copper we understand that you are referring to a single 1/2 oz. layer of copper plating on a piece of FR4 of some industry thickness (typ. 0.8mm or 1.6mm). Mounting an antenna to a single layer board is feasible but the antenna performance would not be optimized since our antennas are not designed to operate optimally on a single layer PCB.
We recommend your product to be design with 4 layers of copper plating placed on the inner and outer layers of the PCB in order to facilitate the proper antenna feed trace impedance from the radio on the PCB to the antenna on the PCB.  We design our antennas to receive an input impedance of 50 ohms from the radio so that no energy is reflected back to the radio through the antenna feed trace.  This is done by using a coplanar waveguide feed trace that references the ground plane below the trace to keep the impedance of the trace at 50 ohm for proper energy transfer to the antenna.
It is very difficult to do this on a single layer PCB. Another problem with a single layer PCB is that the traces that run to all of the other ancillary support chipsets such as the battery, memory and IO traces tend to cut up the ground plane into many small pieces therefore reducing the length of the ground plane that the antenna uses to balance the antenna thus reducing the overall radiated performance of the antenna.

Best regards,

Geoff S.

Meet the moderators

Nansen Tsai

Engineering Manager Nansen has a wealth of technical RF and wireless knowledge, with particular expertise in RF development and problem-solving.

Geoff Schulteis

Senior Antenna Apps Specialist at Antenova Geoff is an antenna design-in and OTA measurement specialist. His knowledge of FCC and world carrier requirements is second-to-none.

Steve Bradburn

Senior Antenna Engineer at Antenova With over 25 years’ experience in manufacturing, test and design, Steve has a wealth of RF and measurement knowledge across many industry sectors.

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