The amplitude and phase balance of the unit mixer is controlled strictly through designing . wideband image rejection is realized in the condition of the fixed if 通过设计控制单元混频器幅度和相位平衡,在固定低中频下,实现了宽带镜频抑制。
The image rejection mixer is composed of two unit mixers , rf is halved as two parts in quadrature ; lo is halved as two parts in phase ; if is synthesized in quadrature 镜频抑制混频器包含两个单元混频器,射频正交功分,本振同相功分,中频正交合成。
Having the property of good image rejection in broadband and low intermediate frequency ( if ) cases , the image - rejected mixers ( irm ) have been widely used in various mmw receivers 而镜频抑制混频器能够在宽带、低中频的情况下实现良好的镜频抑制。
In the part of modulation and demodulation , we analyzed the principles of harmonic mixer , detectors , power dividers / combiners and branch - line couplers 对调制/解调器射频电路部分，包括亚谐波混频器、检波器、功率分配/合成器和分支线耦合器基本原理进行了分析。
Carrier frequency leakage less than - 40db can be attained since good agreement of the two diodes antiparalleled in even - harmonic mixer is guaranteed inherently 在简化载波信号产生电路的同时，利用偶次谐波混频器固有的本振偶次谐波高抑制度特性，来抑制载波泄漏。
It is shown that , similar to the low frequency approximation , the more ideal the switching pair commutates currents , the less the switching pair contributes to the overall output noise 我们证明了，与低频近似模型相似，混频器中的开关对的开关性能越好，则输出噪声越小。
It is shown that the excessive local oscillator drive deteriorates the conversion gain of the mixer at high frequencies , a trend not shown in the low frequency approximation 我们征明了在高频下，过大的本振将使得混频器的转换增益减小。这一趋势无法由低频近似模型给出。
