Miniaturized BAW Filter for Wide Band Application Based on High-Q Factor Active Inductor.

Zhencheng Xu, Jiabei Pan, Feng Gao, Weipeng Xuan, Hao Jin, Jikui Luo, Shurong Dong

Abstract read

In one paragraph

Article in Micromachines, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Zhencheng XuCollege of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.

Jiabei PanCollege of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.

Feng GaoCollege of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.

Weipeng XuanCollege of Electronics & Information, Hangzhou Dianzi University, Hangzhou 310061, China.ORCID 0000-0002-4818-2881

Hao JinCollege of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.ORCID 0000-0001-9798-5149

Jikui LuoCollege of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.ORCID 0000-0003-0310-2443

Shurong DongCollege of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.ORCID 0000-0002-8715-7072

Funding

National Key R&D Program of China，National Natural Science Foundation of China，Zhejiang Province Key R & D programs，Zhejiang Province high level talent special support plan，the Fundamental Research Funds for the Central Universities 2022YFB3604500，U24A20222，2024C01031，2022R52042，2025ZFJH01

6 · The paper itself

Abstract

BAW filters have been widely used in RF circuits, and their combination with integrated passive inductors is one of the most common forms of BAW filters. However, the large size of passive inductors increases the area of the filter, making it unable to meet packaging requirements. At the same time, their low quality factor (Q) severely degrades the performance of the BAW filter. This paper presents a miniaturized wide band BAW filter with small-size high-Q active inductor. The active inductor is implemented by a circuit topology with three common-source amplifiers constructed with N-type transistors. The three-stage topology uses a small-size transistor in the middle stage to reduce the parasitic capacitance at the input node, achieving a large inductive bandwidth. The simulation results show that the active inductor has variable inductance from 1 nH to 10 nH, and a quality factor of up to 4 K from 2 to 7 GHz. The 30 × 30 μm

Indexed as

active inductorBAW filterbulk acoustic wave device

Identifiers

PMID40572336

DOI10.3390/mi16060616

PMCPMC12194924

What OpenQuestion holds

Textmetadata

LicenceCC BY

Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.