HF/VHF零中频接收机前端电路分析设计

摘要

Focus on the imperfection of the RF front-end to compatible receives common HF/VHF signals, further study of the zero-IF structure of the RF front-end. And in view of the question in HF/VHF, the solution is put forward about the circuit, de-signed the RF front-end of the dual-band SDR. Validated by the simulation, prove the feasibility of the scheme and the selected device can satisfy the requirement of the receiver indicators.%以零中频接收机的射频前端在HF/VHF存在的问题为重点，深入研究零中频结构的射频前端结构，并通过电路设计提出解决方案，设计了基于软件无线电原理的HF、VHF双频段射频前端。通过模拟仿真，论证方案的可实现性以及所选器件能够满足设计方案的指标要求。