摘 要：網絡分析儀為測量變頻器件提供了快速而準確的測量方法，根據標量網絡分析儀和矢量網絡分析儀的測量原理，詳細介紹了用標網測量變頻器變頻損耗的方法，以及用矢網測量變頻損耗和相位的方法。分析了兩種儀器在測量中的適用范圍和優缺點在變頻器測量中的優缺點。以正交混頻器為例，提供了測量其幅度不平衡和相位不平衡的網絡分析儀測量方法；以本振與射頻信號頻率范圍重合的特殊應用為例，介紹了簡單準確的測量方法。
關鍵詞：變頻器；標量網絡分析儀；矢量網絡分析儀；幅頻特性；相頻特性
中圖分類號：TN711.3 文獻標識碼：A 文章編號：1672-4984（2007）04-0040-04
Flexible application of network analyzer for measurement of frequency translating devices
ZHANG Na， LI Yuan， JIN Bao-long
（Shanghai Institute of Microwave Equipments，Shanghai 201802，China）
Abstract: Network analyzers provide a method for measurement of frequency translating devices and these methods are more accurate and can save more time. According the principles of scalar network analyzer and vector network analyzer the authors introduced methods to measure conversion loss of frequency translating devices using scalar network analyzer and methods to measure conversion loss and phase using vector network analyzer. They concluded the advantages and disadvantages of them and proposed proper situations for every method. They also gave a quarter mixers as an example and provided measurements for amplitude unbalance and phase unbalance. Simple and accurate measurements were also mentioned as when local oscillator of mixers covers the same frequency range as RF.
Key words: Frequency translating device； Scalar network analyzer； Vector network analyzer； Characteristics of amplitude frequency； Characteristics of phase frequency
