The transmitter of this design is based the Direct Quadrature-up Conversion ( DQUC) structure. And the Local Oscillator signal is worked in two times of RF frequency, which not only save design cost, but also solves the spill caused the direct current system performance deterioration.
发射机部分采用直接上变频结构,具有很好的镜像抑制特性,并且本振信号以两倍射频频率工作,这样既节省了设计成本,又解决了直流泄漏导致的系统性能恶化的问题。
This overall deterioration in soil structure is usually accompanied by a reduced nutrient retention capacity.
这种土壤结构的全面恶化,通常伴随着养份保持能力的降低.
英语网 · 双语娱乐资讯
英语网 · 双语新闻
英语网 · 商务英语
英语网 · 英语词汇