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A MESFET-controlled X-band active bandpass filter

机译:MESFET控制的X波段有源带通滤波器

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A MESFET-controlled active bandpass filter that was developed for use with X-band frequencies is reported. This filter loss is compensated for by the negative resistance generated by a MESFET. The series tank circuit of the filter includes another MESFET that is controlled either by a gate-to-source bias or by a semiconductor laser illumination. The center frequency of the passband can be shifted by 75 MHz with an accompanying bandwidth change from 6 MHz to 17 MHz when the gate-to-source voltage of the tuning MESFET is varied. Laser illumination of this MESFET shifts the center frequency of the filter by 57 MHz with a bandwidth change from 6.5 MHz to 10 MHz.
机译:报告了开发用于X波段频率的MESFET控制的有源带通滤波器。该滤波器损耗由MESFET产生的负电阻补偿。滤波器的串联振荡电路包括另一个MESFET,该MESFET由栅极至源极偏置或半导体激光照射控制。当调整MESFET的栅极至源极电压变化时,通带的中心频率可以偏移75 MHz,伴随的带宽从6 MHz变为17 MHz。 MESFET的激光照射使滤波器的中心频率偏移了57 MHz,带宽从6.5 MHz变为10 MHz。

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