CAJ | 학술논문

针对现有的微带可调滤波器中心频率调节范围较窄的问题，依据梳状滤波器的原理和变容二极管的特性，设计出一种梳状线可调带通滤波器，经ADS仿真可得其中心频率可调范围达到0.49～5.08 GHz、相对带宽仅为6.1％～9.4%，该梳状线可调带通滤波器具有中心频率调节范围很宽、结构简单、易于实现、易于扩展等优点，在工程上具有一定的推广应用价值。
침대현유적미대가조려파기중심빈솔조절범위교착적문제，의거소상려파기적원리화변용이겁관적특성，설계출일충소상선가조대통려파기，경ADS방진가득기중심빈솔가조범위체도0.49～5.08 GHz、상대대관부위6.1％～9.4%，해소상선가조대통려파기구유중심빈솔조절범위흔관、결구간단、역우실현、역우확전등우점，재공정상구유일정적추엄응용개치。
The modulation range of microstrip tunable filter’central frequency is too narrow, to solve this problem, this paper designs a kind of tunable bandpass filter according to the theory of combline filter and the characteristic of variable capacitance diode. The simulation result of ADS proves that the modulation range of this tunable filter’central frequency range from 0.49 GHz to 5.08 GHz, relative bandwidth is only 6.1%~9.4%. This combline tunable bandpass filter has many merits, such as the modula-tion range of its central frequency is very wide, the structure is simple, easy to be realizee, and convenient to be expanded. This tunable filter has definite application value in engineering field.