Antenna with high-precision measurements for CNSS

On the basis of requirements with high-precision measurements for Compass Navigation Satellite System(CNSS), antennas work well at B₁(1561 MHz) and B₂(1207 MHz)bands.In this paper,a novel dual-layer microstrip active antenna is proposed and its feeding net is composed of six couplers and eight-feed points,which can better realize right-hand circular polarization(RHCP)characteristics in wide angles and stabilize the phase center.The signal received from compass satellites is amplified by dual low-noise amplifiers and then filtered,which ensures requirements of receiver gain in bands and improves out-of-band noise suppression.Simulated and measured results show that the antenna meets the requirements of high-precision measurement applications.