Multiband waveguide filters with advanced filtering characteristics based on an in-band transmission zeros method and stacked cylindrical resonators

IF 1.1 4区 计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC
Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong
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引用次数: 0

Abstract

This paper significantly improves the previously proposed novel multiband waveguide filter implementation employing cylindrical resonators. The improved model has the advantages of a further reduced footprint using stacking shunt resonators horizontally and vertically and the ability to realise advanced filtering functions, including transmission zeros below and above the passbands. The coupling matrix synthesis with a brief example and a detailed filter design with considerations for additional coupling and in-line and folded topologies is given. Several filter prototypes, namely third-order quad-band and quintuple-band in-line filters and a sixth-order dual-band folded filter in Ku-band, were designed to validate the proposed model. Selective laser melting (SLM), a metal 3-D printing technique where metal powder is selectively melted with a laser layer by layer, was used to fabricate a dual-band folded filter prototype in copper to validate the proposed model since the model has a complex inner geometry. Additionally, selective laser melting has the advantage of monolithic near-net shape fabrication, eliminating assembly, improving reliability, and reducing weight. The measured results show good agreement with the simulations.

Abstract Image

基于带内传输零点法和叠层圆柱谐振器的具有高级滤波特性的多频带波导滤波器
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来源期刊
Iet Microwaves Antennas & Propagation
Iet Microwaves Antennas & Propagation 工程技术-电信学
CiteScore
4.30
自引率
5.90%
发文量
109
审稿时长
7 months
期刊介绍: Topics include, but are not limited to: Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques. Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas. Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms. Radiowave propagation at all frequencies and environments. Current Special Issue. Call for papers: Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf
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