Problem with nRF51 antenna orientation

[Sami]

Hi,

I have problem with nRF51 antenna orientation. I used nRF51 developement kit (mKIT) board and I had problem with communication if I just change a little inorientation of board, this boards using PCB antenna. Now, I am using Laird module based on nRF51 and it used chip antenna but still I have the same problem. Please let me know what should I do about it and why it happen. Regards

[Sami]

Thank you for your response. actually I used two Laird board or two mKIT (PCA10024) as Master ans Slave. Master initial the communication by sending first frame and then each side after receiving a frame send new frame, I check the correction the frame and if there is any error in received frame the last frame will re-send again and any time that new frame sent in both board, LED1 will toggle. If I change the orientation of boards (relatively it change the orientation of antenna) then in some angle even communication will stop. these two board are located close to each other on my desk with no any case.

[Sami]

Thank you, I'v never run on battery, but direct connect with power supply or via USB cable is tested before and no difference between them. I will test battery.