Design and Testing of a Specialized Antenna Array for GNSS Receiver Anti-Interference Enhancement

The main objective of this study is to improve the anti-jamming performance of GNSS (Global Navigation Satellite System) receivers. Based on this, we carefully designed a seven-element circular antenna array with a center element and right-hand circular polarization. The antenna operates in the frequency band of $1.268 \mathrm{GHz} \pm 10 \mathrm{MHz}$, and the gain is greater than -5 dB in the frequency band, and the good right-handed circular polarization is achieved in the range of nearly 100°. This elaborate antenna array is then integrated into a GNSS receiver and subjected to an anti-interference test, which is carried out in an anechoic chamber. The test results highlight the excellent anti-interference performance of the receiver. Even when the interference reaches 130 dB, the receiver shows strong anti-interference ability, unswervingly maintaining its high performance, and the positioning accuracy does not degrade significantly.