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介质谐振器作稳频的振荡器(DRO)以其特有的成本低、体积小、可靠性高、功耗低等优点,在通信、雷达、导航等领域得到了广泛的应用.但在目前新型的微波通信设备中,往往要求微波固态源具有调制性能,以便能插入次基带或超基带公务信号,以提高频谱利用率.另外,在载波上直接进行调制后,可简化通信设备,降低成本和提高设备可靠性.本文介绍的微波介质振荡器调制器是为某电视信号传送电路而研制的,其工作频段在X波段,调制带宽可达27MHz以上,输出功率17kBm以上,频率温度特性为±1.75ppm/℃.
The dielectric resonator frequency-stabilized oscillator (DRO) has been widely used in the fields of communication, radar, navigation and so on due to its unique advantages of low cost, small size, high reliability and low power consumption etc. However, Of microwave communication equipment, it is often required that the microwave solid-state source have modulation performance so as to be able to insert the sub-baseband or ultra-baseband service signals to improve the spectrum utilization rate. In addition, the direct modulation on the carrier can simplify the communication equipment, reduce the cost and Improve the equipment reliability.This article describes the microwave dielectric oscillator modulator is developed for a television signal transmission circuit, the operating band in the X band, the modulation bandwidth up to 27MHz above the output power of 17kBm above the frequency temperature characteristics of ± 1.75 ppm / ° C.