- Mon Jun 25, 2007 1:10 pm
#31817
I built my own transmitter and receiver PCB board using nRF24L01 and MSP430F1232. I sent a 18 bytes package 15 times/s. The system works properly only when the transmitter and receiver are close to each other (1-2 meters) and in certain orientation. Out of this range or if there are some obstacles between TX and RX, very few package can be received.
I have tried different frequency channels and enabled the AA. I set the data rate to be 1Mbps and RF output power to be highest (0dB). But the problem is still there.
I don't know if it is the problem of my layout. After all, it's my first time to layout a RF board. I have tried to separate the digital and analog parts as far as possible. Since my board is small (18mmx16mm), this separation is very limited. Ground plane was added on the backside of the board. But there is no ground plane beneath the ceramic antenna. I use the exactly matching network as stated in the datasheet. The track length between antenna and RF chip is pretty short and comparable with that on MiRF v2.
I'm a fresh in RF/wireless design. I wish you guys could give me some help. Any suggestions are appreciated.
Thanks a lot!
I have tried different frequency channels and enabled the AA. I set the data rate to be 1Mbps and RF output power to be highest (0dB). But the problem is still there.
I don't know if it is the problem of my layout. After all, it's my first time to layout a RF board. I have tried to separate the digital and analog parts as far as possible. Since my board is small (18mmx16mm), this separation is very limited. Ground plane was added on the backside of the board. But there is no ground plane beneath the ceramic antenna. I use the exactly matching network as stated in the datasheet. The track length between antenna and RF chip is pretty short and comparable with that on MiRF v2.
I'm a fresh in RF/wireless design. I wish you guys could give me some help. Any suggestions are appreciated.
Thanks a lot!