适用于基于高Q因子活性电感器的宽带应用的小型化BAW过器
Zhencheng Xu1, Jiabei Pan1, Feng Gao1,2
1College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
Micromachines
|June 27, 2025
概括
这项研究引入了使用新型活性电感器的小型批量声波 (BAW) 过器. 这种设计大大减少了波器的大小,并提高了与传统被动电感器相比的射频 (RF) 性能.
科学领域:
- 电气工程 电气工程
- 无线电频率 (RF) 工程
- 材料科学 材料科学 材料科学
背景情况:
- 大量声波 (BAW) 过器在射频电路中至关重要.
- 在BAW过器中集成的被动电感器很大,质量系数 (Q) 很低,性能降低,尺寸增加.
- BAW过器的小型化和性能提升对于现代包装要求至关重要.
研究的目的:
- 为了展示一个小型化的宽带BAW波器,使用一个小尺寸的高Q活性电感器.
- 为了克服传统被动电感器在BAW波器应用中的局限性.
- 为了证明BAW波器尺寸和性能的显著改进.
主要方法:
- 使用N型晶体管的三级常用源放大器拓设计了一个活性电感器.
- 在中间阶段使用一个小晶体管来最大限度地降低寄生电容,并扩大诱导带宽.
- 活性电感器被集成到4.55-5.05 GHz的BAW过器梯架结构中.
主要成果:
- 活性电感器在广泛的频率范围 (2-7 GHz) 中表现出可变电感 (1-10 nH) 和高Q因子 (高达4000).
- 微型活性电感器占据了一个30 × 30μm2的芯片面积.
- 由此产生的BAW波器具有低插入损失 (-1.1dB) 和高的带外排斥 (-35dB左,-53dB右).
结论:
- 拟议的活性电感器将BAW过器的整体芯片大小显著降低到0.83 × 0.75 mm2.
- 这种主动电感器方法与使用被动电感器的设计相比,大大提高了BAW波器的性能.
- 开发的BAW过器适用于要求紧尺寸和高射频性能的应用.
相关概念视频
Active Filters
936
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:
936
Passive Filters
614
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...
614
Parallel Resonance
280
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:
280
Characteristics of Series Resonant Circuit
330
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:
330
Op Amp AC Circuits
279
Within an audio system, the filter circuit plays a pivotal role in processing the amplified audio signal from an amplifier. Its primary function is significantly attenuating signal components with lower frequencies, thereby shaping the audio output. This circuit's operations are examined, focusing on the fundamental filter configuration. This configuration involves an operational amplifier arranged in an inverting setup coupled with resistors (R1 and R2) and a capacitor (C1).
279
Frequency Response of Op Amp Circuits
428
Operational amplifiers (op-amp) are used in signal conditioning, filtering, or for performing mathematical operations such as addition, subtraction, integration, and differentiation. The frequency response of an op-amp is an important aspect that describes how the gain of the amplifier varies with frequency.
Frequency Response and Gain:
The gain of the op-amp, A(ω), is not a constant but a function of the input signal frequency. An op-amp can maintain a constant gain at low frequencies,...
Frequency Response and Gain:
The gain of the op-amp, A(ω), is not a constant but a function of the input signal frequency. An op-amp can maintain a constant gain at low frequencies,...
428


