Review PA LNA

RE: Review PA LNA

HuanVH — Wed, 08 Jan 2020 01:48:53 GMT

Without using the RFX2401C, I would measure a distance of about 20 meters in obstructed conditions.
I tried with sd_ble_gap_tx_power_set but it was not more effective.
Here is my pcb file: drive.google.com/.../view

RE: Review PA LNA

Marjeris Romero — Tue, 07 Jan 2020 12:35:51 GMT

Hi,

From what I see in the datasheets for CR2450 the max pulse current is not higher than 15mA, which will be too little to drive the RFX2401C. In the datasheet for the RFX2401C the TX high-power current POUT=+20dBm is 90 mA, which is way higher that what the battery can deliver.

[quote user="HuanVH"]So is there any other way than using RFX2401C to increase the range of nRF52832?[/quote]

How much range do you have currently without using the RFX2401C? To increase the range you can try increasing the output power from the nRF52832 to +4dBm if you haven't done so yet. You can also attach your layout files so we can review radio network, antenna placement, etc, which can have a lot to say in terms of range performance as well...

Best regards,

Marjeris

RE: Review PA LNA

HuanVH — Mon, 30 Dec 2019 01:35:40 GMT

Hi,

I use cr2450 battery. When using this battery, the advertising time is reduced to half (I use nRF Connect on my phone).

So is there any other way than using RFX2401C to increase the range of nRF52832? I still need to use the CR2450 battery. Thank msromero.

RE: Review PA LNA

Marjeris Romero — Fri, 27 Dec 2019 15:40:51 GMT

Hi,

What kind of battery are you using to power the front-end module? Because of the current draw of the PA not all batteries will be suitable for powering it.

Can you be more specific about the RSSI issues you are experiencing? How many dBm it changes, etc?

Best regards,

Marjeris