现代滤波器除具备消除带外噪声和干扰频谱分量的能力,还要求支持多个信道,为 此,本文用安捷伦(Agilent)公司的电子设计自动化软件 ADS 设计了一款工作频段在 135MHz~145MHz、3dB 带宽小于 10MHz 的电可调带通滤波器。79034
该电调带通滤波器使用并联耦合谐振器谐振,用变容二极管作为调节器件,因此本 文中详述了耦合谐振器的设计过程以及搭建变容二极管模型并通过了仿真调试。本文给 出了电调中频带通滤波器的设计过程及仿真认证结果。
顺应现代通信设备的小型化、智能化和数字化的趋势,本文设计过程中考虑到了现 代滤波器要求体积小、重量轻、数字控制、高灵敏度和强稳定性等特征。
毕业论文关键词 电调滤波器 变容二极管 ADS 带通滤波器
设 计 外 文 摘 要
Title An Electrically Tunable Intermediate Frequency Band-pass Filter
Abstract Modern filters are required to have the ability of eliminating out-of-band noise and interference spectrum components and to be multi-channel supported。 As a result I designed a electrical tunable intermediate frequency band pass working at the frequency range of 135MHz to 145MHz and the 3dB bandwidth less than 10MHz filter by using Agilent company’s automatic electronic design software ADS。
The electrical tunable band-pass filter adopts the structure of parallel coupled resonator resonant, using varactor diodes as the adjusting device, so this paper details coupled resonator designing process and builds a varactor diode model and followed the simulation and debugging process。 In this paper, the design process and simulation results of the electrically tunable intermediate frequency filter are presented。
Comply with the modern communication equipment miniaturization, intelligent and digital trend, the design process considering the modern filter characteristics of small volume, light weight, digital control, high sensitivity and strong stability requirements。
Keywords Electrically tunable filter Varactor ADS Band pass filter
目 次
1 绪论 1
1。1 电调滤波器的研究意义与背景 1
1。3 本论文的结构和内容安排 2
2 滤波器基本理论 4
2。1 滤波器的基本指标 4
2。2 滤波器的基本模型 5
2。3 耦合谐振带通滤波器的设计原理 9
2。4 本章小结 13
3 变容二极管 14
3。1 变容二极管的基本理论 14
3。2 变容二极管选型与仿真 17
3。3 本章小结 20
4