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公开(公告)号：US4703273A
公开(公告)日：1987-10-27
申请号：US759783
申请日：1985-07-29
申请人： William F. Kolbe , Branko Leskovar
发明人： William F. Kolbe , Branko Leskovar
摘要： A high frequency energy pulsing system suitable for use in a pulsed microwave spectrometer (10), including means (11, 19) for generating a high frequency carrier signal, and means (12) for generating a low frequency modulating signal. The carrier signal is continuously fed to a modulator (20) and the modulating signal is fed through a pulse switch (23) to the modulator. When the pulse switch (23) is on, the modulator (20) will produce sideband signals above and below the carrier signal frequency. A frequency-responsive device (31) is tuned to one of the sideband signals and away from the carrier frequency so that the high frequency energization of the frequency-responsive device (31) is controlled by the pulse switch (23).
摘要翻译： 一种适用于脉冲式微波光谱仪（10）的高频能量脉冲系统，包括用于产生高频载波信号的装置（11,19），以及用于产生低频调制信号的装置（12）。 载波信号被连续馈送到调制器（20），并且调制信号通过脉冲开关（23）馈送到调制器。 当脉冲开关（23）接通时，调制器（20）将产生高于和低于载波信号频率的边带信号。 频率响应装置（31）被调谐到边带信号中的一个并且远离载波频率，使得频率响应装置（31）的高频通电由脉冲开关（23）控制。
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公开(公告)号：US4110686A
公开(公告)日：1978-08-29
申请号：US825503
申请日：1977-08-17
CPC分类号： G01N24/008 , G01R27/04
摘要： Gas samples are analyzed for pollutants in a microwave cavity that is provided with two highly polished walls. One wall of the cavity is mechanically driven with a piezoelectric transducer at a low frequency to tune the cavity over a band of microwave frequencies in synchronism with frequency modulated microwave energy applied to the cavity. Absorption of microwave energy over the tuned frequencies is detected, and energy absorption at a particular microwave frequency is an indication of a particular pollutant in the gas sample.
摘要翻译： 分析气体样品中的微波空腔中有两个高度抛光的墙壁上的污染物。 空腔的一个壁用低频率的压电换能器机械驱动，以与施加到空腔的调频微波能量同步地在微波频带上调谐空腔。 检测到在调谐频率上的微波能量的吸收，并且特定微波频率处的能量吸收是气体样品中特定污染物的指示。
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