Ku频段多通道抗振激励源设计

介绍一种Ku频段多通道抗振激励源设计,采用X频段抗振低相噪介质稳频振荡器(DRO),通过结构固连减少各部分电路在振动环境中的相对运动,保证了激励源在振动条件下的稳定性.采用二次谐波镜频抑制混频器一次变频,简化了激励源电路并实现了对本振泄漏的高抑制度和良好的边带抑制.多芯片微带混合集成设计实现了激励源的小型化.研制的样机达到了振动环境下相噪优于-97 dBc/Hz@10kHz,本振抑制大于32 dB、边带抑制大于35 dB的优良性能,验证了设计技术的有效性.

Design of a Ku- band Multi- channel Anti- vibration Exciter Source

A design method of Ku- band multi- channel anti- vibration exciter source is introduced. By alleviating relative movements of each circuit in vibration environment through fixed connecting structure, an X- band anti- vibration low phase noise dielectric resonator oscillator (DRO) is used to guarantee the stability under vibration condition. The simple frequency convention of secondary harmonic image frequency rejection mixer is used to simplify the excitation source circuit, realize high rejection of local oscillator (LO) leak and achieve good sideband suppression. The hybrid desig of microwave integrate circuit(HMIC) with multi-chip is used to realize the signal source miniaturi zation. The phase noise of prototype is higher than -97 dBc/Hz@ 10kHz, LO rejection is higher than 32dB, and sideband suppression is higher than 35dB under vibration condition. The test res verifies the validity of this design.