Hi, all.
Does ground reflection have huge effect on CC2530?? I am wondering if any measurement has been taken in TI regarding the performance of CC2530/CC2531 when using them quite near the ground, say 20-30cm height from the it.
I used two CC2530 modules to communication with each other at 4dBm transmission power with the SMA antenna. Then I found them lost the communication at a distance of about 30 meters. And it became worse when using CC2531 dongles (with PCB antenna) which gave a communication range of only 15 meters. Those measurements were taken in a flat open area with concrete road and lawn and the modules were put 20-30cm from the ground. I think that is due to the ground reflection/deflection that ruins the communication. Does anyone have any idea of this phenomenon??
Although TI claims that CC2530/CC2531 can reach a range of about 450 meters. But those measurements were taken in a way that the modules were placed at least 1 meter from the ground when I watched the videos. 1 meter is quite long when comparing with the wavelength of 2.45GHz, so the ground reflection may not have much effect on the modules. In my application, however, some modules will be put at that height of around 20-30cm. So do you think I can still use CC2530/CC2531 in my case? What if I apply CC2591, the power amplifier in my system? Do you think that will help to reach hundreds meters range in my situation? Or do you think I should find some other alternatives instead of CC2530/CC2531? What is your idea of that?
Thank you very much!