High sensitivity antennas for EMI application

Nowadays, the digital circuit boards in many kinds of communication systems are very small and the gain and efficiency of antennas are very high, so electromagnetic compatibility (EMC) problem is being paid more and more attention. As antennas are very close to the printed circuit boards (PCB), the energy will be coupling to PCB and then results in strong electric current. If the circuit near the antenna is very sensitive while the radiation of the antenna is very strong compared to the thread held of ICs on the PCB, the PCB will not work. In this research, we proposed the improvement scheme of interfere between the ICs of PCB and antennas attached basing on the improved method to find out the reasons of sensitivity to save time and cost of researches and then accelerate time of the products produce.