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相关概念视频

Active Filters01:25

Active Filters

1.2K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.2K
Passive Filters01:27

Passive Filters

940
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
940
Parallel Resonance01:23

Parallel Resonance

500
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
500
Clipper Circuit01:18

Clipper Circuit

832
A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
832
Design Example01:23

Design Example

521
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
521
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

1.4K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
1.4K

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相关实验视频

Updated: Jan 10, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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一个紧的L频段可重新配置的双模式补丁过器.

Abdel Fattah Sheta1, Majeed A S Alkanhal1, Ibrahim Elshafiey1

  • 1Electrical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia.

Micromachines
|November 27, 2025
PubMed
概括

这项研究引入了一个紧的,可调节的带通波器,使用了一种新的槽式双模式微条带方形补丁. 这种设计为先进的无线应用提供了频率敏捷性和小型化.

科学领域:

  • 电气工程 电气工程
  • 电磁学 电磁学 电磁学 电磁学
  • 微波工程 微波工程

背景情况:

  • 传统的固定多共振器过器缺乏频率敏捷性和小型化.
  • 微条纹过器是现代无线通信系统中至关重要的组件.

研究的目的:

  • 设计和实施一个紧的可调节带宽过器,具有增强的频率灵活性.
  • 为波器设计利用一个有槽的非退化的双模微条方形补丁.

主要方法:

  • 采用了带槽的双模式方形补丁结构,带有不对称的输入线来激发双共振模式.
  • 在补丁角处集成的反向偏差变频器二极管,以实现中心频率的电子调.
  • 采用RT/Duroid 6010.2层面板和一个偏差片用于Varactor二极管偏差.

主要成果:

  • 通过模拟和实验验证,证明了可调节的特性.
  • 在可调频带中实现了良好的插入损失和阻抗匹配.
  • 该设计在频率敏捷性和小型化方面表现出显著的优势.

结论:

  • 拟议的可调节带宽波器设计适用于现代无线技术.
关键词:
紧型过器 紧型过器双模式补丁补丁是什么补丁共振器的共振器.可重新配置的过器

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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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  • 该设计提供了一个紧的解决方案,具有电子频率控制.
  • 过器的性能特性使其适用于通信,雷达和卫星系统.