Inline Quasi-Elliptic Bandpass Filter Based on Metal 3-D Printing Technology

Jiayu Rao; Kenneth Nai; Jose Marques-Hueso; Povilas Vaitukaitis; Jiasheng Hong

doi:10.1109/TMTT.2022.3144275

Inline Quasi-Elliptic Bandpass Filter Based on Metal 3-D Printing Technology

Jiayu Rao, Kenneth Nai, Jose Marques-Hueso, Povilas Vaitukaitis, Jiasheng Hong

Renishaw plc

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

56 Downloads (Pure)

Abstract

This article presents a novel waveguide loaded air slots' resonator (WLASR) comprised of a surrounding metal box and inserted metal disk with etched air slots. The proposed WLASR exhibits a comparable unloaded quality factor ( Q_u ) to the coaxial resonator and allows controlling the electric and magnetic couplings separately. These attractive characteristics were first deployed to design a four-pole inline electrical-magnetic mixed-coupling bandpass filter centered at 2.82 GHz with a fractional bandwidth of 6.73% and two controllable transmission zeros (TZs) located at 2.65 and 2.98 GHz, respectively. Direct metal 3-D printing technology was utilized to manufacture the prototype. The measured results were auspicious for the first demonstrated 3-D printed prototype. Hence, two six-pole filters with multiple TZs, more compact sizes, higher Q_u , and improved shape were designed. For experimental validation, one of them was printed with only two pieces. The measured results agreed well with the simulated ones.

Original language	English
Pages (from-to)	2156-2164
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	70
Issue number	4
Early online date	1 Feb 2022
DOIs	https://doi.org/10.1109/TMTT.2022.3144275
Publication status	Published - Apr 2022

Keywords

Bandpass filters (BPFs)
inline structure
metal 3-D printing
mixed coupling
transmission zeros (TZs)

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2022.3144275

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Cite this

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title = "Inline Quasi-Elliptic Bandpass Filter Based on Metal 3-D Printing Technology",

abstract = "This article presents a novel waveguide loaded air slots' resonator (WLASR) comprised of a surrounding metal box and inserted metal disk with etched air slots. The proposed WLASR exhibits a comparable unloaded quality factor ( Qu ) to the coaxial resonator and allows controlling the electric and magnetic couplings separately. These attractive characteristics were first deployed to design a four-pole inline electrical-magnetic mixed-coupling bandpass filter centered at 2.82 GHz with a fractional bandwidth of 6.73% and two controllable transmission zeros (TZs) located at 2.65 and 2.98 GHz, respectively. Direct metal 3-D printing technology was utilized to manufacture the prototype. The measured results were auspicious for the first demonstrated 3-D printed prototype. Hence, two six-pole filters with multiple TZs, more compact sizes, higher Qu , and improved shape were designed. For experimental validation, one of them was printed with only two pieces. The measured results agreed well with the simulated ones.",

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AU - Nai, Kenneth

AU - Marques-Hueso, Jose

AU - Vaitukaitis, Povilas

AU - Hong, Jiasheng

PY - 2022/4

Y1 - 2022/4

N2 - This article presents a novel waveguide loaded air slots' resonator (WLASR) comprised of a surrounding metal box and inserted metal disk with etched air slots. The proposed WLASR exhibits a comparable unloaded quality factor ( Qu ) to the coaxial resonator and allows controlling the electric and magnetic couplings separately. These attractive characteristics were first deployed to design a four-pole inline electrical-magnetic mixed-coupling bandpass filter centered at 2.82 GHz with a fractional bandwidth of 6.73% and two controllable transmission zeros (TZs) located at 2.65 and 2.98 GHz, respectively. Direct metal 3-D printing technology was utilized to manufacture the prototype. The measured results were auspicious for the first demonstrated 3-D printed prototype. Hence, two six-pole filters with multiple TZs, more compact sizes, higher Qu , and improved shape were designed. For experimental validation, one of them was printed with only two pieces. The measured results agreed well with the simulated ones.

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KW - metal 3-D printing

KW - mixed coupling

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Inline Quasi-Elliptic Bandpass Filter Based on Metal 3-D Printing Technology

Abstract

Keywords

ASJC Scopus subject areas

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