Design and Simulation of A RF Front-end Circuit of Dual Channel Navigation Receiver

RF front-end design is one of the most important steps in receiver design, and its noise performance has a significant impact on the received signal noise characteristics, baseband processing performance, the final positioning accuracy and other indicators. The theoretical IF value of the satellite signal received by the receiver and the frequency search range of the signal acquisition algorithm depend on the frequency setting scheme of the RF front-end. This paper introduces the RF front-end design of a dual-channel multi-mode multi-frequency receiver, mainly for BI1 and L1C frequency points, the circuit design of the RF end of the receiver is introduced in detail, and the corresponding solutions are introduced for the link attenuation, signal radiation, electromagnetic interference and other conditions of the RF link. And the corresponding link simulation is carried out through ADS to ensure the reliability of the design. The final product is tested by the corresponding hardware and software, and the expected effect is achieved.