CC1310: miniature helical PCB antenna for 868Mhz

Rohit Rajapure

Part Number: CC1310

Hello,

we have designed the custom board using miniature helical PCB antenna for 868Mhz. we have created the device for Helical antenna. we want long range communication(say 40mtrs indoor). we want to transmit and receive packet size of 100 Byte.

attached are the gerbers. we kindly request you to verify and suggest the changes needed to get long range communication.

we have also attached the screen shot of impedance matching(using APPCAD TOOL) done while designing the PCB.

Thanks in advance.

gerber.rar

over 5 years ago

0 PM over 5 years ago

TI__Mastermind 27145 points

Hi,

I recommend to put a PI Network (Antenna Matching Circuit) in between C10 and Antenna. It seems Series Component is missing. You can add 0 Ohm Resistor in Series in between L4 & C8. These components can be tuned on Prototype boards for Antenna matching. Antenna matching must be done on a Complete Unit (with Casing).
C15 can be removed.
Please refer to our Reference Design SWRC327 for more details.
Layout Looks OK.

Thanks,
PM

0 Rohit Rajapure over 5 years ago in reply to PM

Intellectual 280 points

5810.gerber.rar

Hello PM,

We have done the changes according to your suggestions.

Attached are the gerbers file. We have also attached the screen shot of the Schematic PI Network section.

I request you to kindly verify and give your feedback for the same.

Thanks in Advance

0 Rohit Rajapure over 5 years ago in reply to Rohit Rajapure

Intellectual 280 points

we see that all reference designs are 4 layer. we are designing 2 layer board. we request you to kindly specify whether does it make any change in circuit or layout for antenna when designing 2 layer board.

0 TER over 5 years ago in reply to Rohit Rajapure

TI__Guru**** 317180 points

The antenna only uses two layers in the 4-layer reference designs.

0 PM over 5 years ago in reply to Rohit Rajapure

TI__Mastermind 27145 points

Hi,

Yes, it looks OK to me.

Please note that L4 & C8 must be tuned on prototypes for Antenna matching.

Thanks,
PM

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CC1310: miniature helical PCB antenna for 868Mhz