I have designed a PCB trace antenna for a BLE module. I used an existing reference design, which is offered to be used in your own design. I am able to connect to the radio, and on a spectrum analyzer the frequency is where it's supposed to be (right in the middle 2.442GHz), but the (effective) range is terrible. With the dev board module I get close to 90 meters without losing the connection but with my board I get about 8-10 meters before it drops the connection. The transmit power seems good but I have a very poor understanding of the amplitude of the frequency. When comparing the dBm of my design and the reference design there is very little difference in the dBm. So, my questions are how can I have the correct frequency but such poor range, what attributes to the range, and what can be done to a PCB trace antenna to increase its range?