CC2340R5: Request for Compact PCB Antenna Design Suggestion for BLE Module

Hi Harinder,

At this size, your best option would be a chip antenna because there simply isn't enough space for antenna to achieve 2.4GHz.

Best regards,

Bun

Hi Bun Kuch,

Thank you for your response. Could you please share your suggestions on this? Also, what would be the most compact design option available for the PCB antenna?

Best Regards,

Harinder

The most compact PCB antenna for 2.4GHz is:

https://www.infineon.com/assets/row/public/documents/cross-divisions/42/infineon-an91445-antenna-design-and-rf-layout-guidelines-applicationnotes-en.pdf?fileId=8ac78c8c7cdc391c017d073e054f6227

But please understand the tradeoffs listed below:

1. The radiation pattern is only optimal for one direction

2. One thing not discussed in this guideline is the ground plane which is the other half of the antenna. While the antenna is small, it still wants to be connected to a ground plane that is roughly double the size of your board (ideally triple the size).

3. If you try to use this antenna in your design, understand that it will have a very narrow bandwidth which means it is very vulnerable to part tolerance and a very degraded efficiency which will reduce radiated output power

Bun

Thank you Bun Kuch, I will consider all the valuable inputs you have shared & also share my final design with you

Have a great Day!