Spectrum Analyzer Harmonic Mixers
STH series spectrum analyzer harmonic mixers are GaAs beam lead Schottky diode-based mixers. These harmonic mixers employ a single diode and broadband circuitry to extend the operation frequency of test instruments, such as spectrum analyzers and frequency counters, from 18 GHz or below to higher millimeterwave frequencies of up to 170 GHz. These harmonic mixers also provide low conversion loss and continuous frequency coverage across full waveguide band operations. Unlike the balanced harmonic mixers (SFH series), these harmonic mixers do not have a built-in frequency diplexer. Therefore, their LO and IF ports are combined into a single coaxial port, which LO and IF signals share. This feature provides for a convenient connection when used with spectrum analyzers or frequency counters that have a built-in diplexer, such as models offered by Advantest, Anritsu, Rohde & Schwarz, Tektronix and Phase Matrix (EIP).