【多选题】Microwave engineering pertains to the study and design of microwave circuits, components, and systems. Fundamental principles are applied to analysis, design and measurement techniques in this field. ...
A.
Design of microwave circuits, components, and systems. 【设计微波电路、元件及系统】
B.
Fundamental principles are applied to analysis, design and measurement techniques in this field. 【微波原理、应用、测试技术等】
C.
低频电子线路( low frequency Electronic Circuit)
D.
antennas , radar , transmission lines , space based systems ( remote sensing ), measurements, microwave radiation hazards and safety measures. 【天线、雷达、传输线、遥感/遥测 等】
【简答题】Spread spectrum simply means that data is sent in small pieces over a number of the ( ) (A.continuous B.high C.low D.discrete ) frequencies available for use at any time in the specified range. Devi...
【单选题】{ To draw the small-signal ac equivalent circuit for a common-emitter amplifier, we can treat the capacitors as ( ). (We assume that the coupling and bypass capacitors are chosen to have very low ac i...
【单选题】In the design of a radio receiver containing a type 3 filter, a low capacitance level and a high inductance level would be most useful for the purpose of:
A.
enhancing radio reception across the frequency spectrum.
B.
tuning out signals at high and low frequencies.
C.
tuning in a radio station at a fixed frequency.
D.
minimizing unwanted audio noise at middle frequencies.