多频可控制的带内抑制在宽带微条纹波器中 设计用于5GWi-Fi和卫星通信系统,使用四模式Stub加载共振器
Guoqiang Zhang1, Abdul Basit1,2, Muhammad Irshad Khan3
1School of Information Science and Engineering, NingboTech University, Ningbo 315100, China.
Micromachines
|July 8, 2023
概括
本研究介绍了一种新的,具有成本效益的宽带过器,用于无线通信. 新设计实现了多频信号抑制,具有紧的结构和低插入损失.
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:
- 传统的宽带过器设计使用级联低通/高通过器与多个共振器往往是复杂和昂贵的.
- 平面微条式输电线路结构为过器设计提供了更简单,更具成本效益的替代方案.
研究的目的:
- 为无线通信系统提供一种具有多频抑制能力的新型宽带过器.
- 解决现有过器设计的局限性,专注于低成本,低插入损失和良好的带外性能.
主要方法:
- 采用T形缩短的带共振器,与平面微带传输线路结构中的中央方形环相连.
- 采用C字形和短路方形环共振器,以在4.9GHz,8.3GHz和11.5GHz时实现特定的停止频段.
- 使用传输线理论和偶异常模式分析分析过器,并使用HFSS (高频结构模拟器) 进行模拟.
主要成果:
- 实现了具有平面拓的紧型过器设计,占用0.52 λg × 0.32 λg电路面积.
- 在整个工作频段中,已证明低插入损失为0.4dB,良好的返回损失大于10dB.
- 成功实现了在4.9 GHz,8.3 GHz和11.5 GHz的独立控制的多频段停止带.
结论:
- 拟议的宽带过器提供了紧性,简单的平面制造和有效的多频抑制的独特组合.
- 该设计的性能特性使其适用于各种下一代无线通信应用,包括卫星和5G (WLAN 802.11j) 系统.
- 使用制造的原型进行实验验证,证实模拟和测量结果之间的良好一致性.
相关概念视频
01:24Characteristics of Series Resonant Circuit
282
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
282
01:27Passive Filters
562
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...
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...
562
01:25Active Filters
862
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:
862
01:23Parallel Resonance
233
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:
233
01:23Design Example
348
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...
348
01:17Series Resonance
215
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
215