Article
Engineering, Electrical & Electronic
Yi Wu, Kaixue Ma, Yongqiang Wang
Summary: This paper presents a universal coupled topology to design cascaded multiple passbands bandpass filters with numerous in-band poles and out-band transmission zeros. The proposed topology is validated by synthesizing quad-band and dual/tri-band filters with TZs in different passbands. The experimental results show a good match with the simulated results.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Engineering, Electrical & Electronic
Alexander Zakharov
Summary: This article addresses the inverse problem for trisection and quadruple bandpass filters with mixed cross coupling, determining the placement of transmission zeros and mixed cross coupling components. The study shows ten different options for placing transmission zeros on the complex plane and the possibility of a second-order transmission zero on the j Omega axis. Theoretical results are validated with practical implementations of microstrip and stripline filters.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Wei Qin, Yu-Ke Zhou, Wen-Wen Yang, Jian-Xin Chen
Summary: This article presents a new design concept for dielectric waveguide bandpass filters with multiple transmission zeros by constructing multiple cascaded-trisection coupling structures. The design concept is validated through the design, simulation, and measurement of different filters with varying numbers of cascaded-trisection structures. The designed filters exhibit low insertion loss, compact size, lightweight, and flexibly controllable transmission zeros.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Qianyin Xiang, Hongchun Sun, Mingye Fu, Qiuyan Jin, Quanyuan Feng
Summary: This paper proposes a novel 5th-order cross-coupled tunable bandpass filter based on full-wavelength tunable resonator with four independent coupling regions. The slop of the coupling coefficients versus the resonant frequency is pre-defined to achieve constant bandwidth for the tunable bandpass filter. The filter consists of two cascaded trisection structures with a common resonator to reduce size and generate transmission zeros.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Computer Science, Information Systems
Santiago Cogollos, Richard J. Cameron, Marco Guglielmi, Juan Carlos Melgarejo, Vicente E. Boria
Summary: The objective of this paper is to demonstrate the use of inductive quadruplets with diagonal cross-couplings as building blocks for filters in rectangular waveguide. It shows how general transfer functions can be implemented using coupling matrix synthesis and distributed networks. Several filter design examples are provided, and the measured results validate the new filter structures and design procedures.
Article
Engineering, Electrical & Electronic
JingJing Yang, Qianyin Xiang, Xiaoguo Huang, Dinghong Jia, Quanyuan Feng
Summary: A novel cascade trisection (CT) coupling structure, based on half-wavelength resonators, is proposed for designing constant absolute bandwidth (CABW) tunable bandpass filters. The third-order and fifth-order tunable bandpass filters are designed to achieve CABW and a high side cross-coupling transmission zero (Tz), showing good performance in terms of central frequency tuning range, bandwidth, and attenuation slope.
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Xi-Bei Zhao, Feng Wei, Mohamed Malki, Li Yang, Roberto Gomez-Garcia
Summary: This paper presents a class of balanced RF planar fourth-order bandpass filter with transmission zeros and extended bandwidth for both differential-mode and common-mode operations. The filter is composed of a balanced-to-single-ended feeding stage and a single-ended BPF unit, which result in wideband filtering while maintaining reflectionless behavior.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Physics, Applied
Liguo Zhou, Zhihe Long, Quanyuan Feng, Zhixiong Di
Summary: This paper proposes a method for designing a miniaturized ultra-narrowband high-temperature superconducting linear phase filter using resonator-shared cascaded quadruplet units constructed by quarter-wavelength microstrip line. The introduction of transmission zeros improves transition band roll-off rate and in-band group delay characteristic. The designed filter demonstrates excellent performance in insertion loss, out-of-band rejection, return loss, and passband selectivity.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Ping Zhao
Summary: This article presents a direct coupling matrix synthesis approach for filters with cascaded singlets, providing synthesis examples and successfully designing a generalized Chebyshev filter, validating the effectiveness of the method.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Computer Science, Software Engineering
Jun Wang, Sixuan Li, Kunlun Li, Qizhen Zhu
Summary: Correlation filter-based tracking methods are significant in research due to their quick tracking, simple deployment, and straightforward principle. To balance tracking speed and performance, we propose an adaptive cascaded and parallel feature fusion-based tracker (ACPF) that can estimate position, rotation, and scale. The ACPF fuses deep and handcrafted features in both Log-Polar and Cartesian branch and updates templates adaptively based on the weights of response maps.
Article
Computer Science, Information Systems
Zhaohui Hao, Guixi Liu, Haoyang Zhang, Fei Wang
Summary: In recent years, the multi-expert collaborative tracking strategy has been introduced into visual tracking tasks and achieves impressive performance. Different from most existing multi-expert trackers, the proposed cascaded-parallel tracking algorithm (CPT) adaptively selects the suitable expert among multiple tracking models. With the proposed adaptive expert selection mechanism, the most reliable expert (i.e. tracking model) is selected for tracking in each frame. Extensive experimental results demonstrate that our proposed algorithm performs favorably against some state-of-the-art algorithms on various datasets.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Min-Hua Ho, Chung-I G. Hsu, Jhuo-Ting Hung, You-Lin Shen
Summary: This work proposes miniaturized trisection bandpass filters using size-reduced substrate integrated coaxial resonators. These filters have the advantage of an excellent circuit-area efficiency and a freely switchable transmission zero.
INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS
(2022)
Article
Engineering, Electrical & Electronic
Yuxing He, Yu Zeng, Hongxiang Shen, Nobuyuki Yoshikawa, Xihua Zou, Lianshan Yan, Giuseppe Macchiarella
Summary: This article presents a general synthesis method for achieving flexible bandwidth of a bandpass filter by cascading modular blocks. The method utilizes a matrix procedure in the bandpass domain, enabling the extraction, relocation, and cascading of various bandpass blocks together. The resulting prototype facilitates the realization of sharp selectivity without limitations on filter degree or bandwidth.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Manufacturing
Xinhui Wu, Yazi Cao, Bo Yuan, Yanzhu Qi, Gaofeng Wang
Summary: This paper proposes a novel compact triple-mode ceramic monoblock filter for 5G applications. The filter is designed with a low-profile triple-mode ceramic cavity with silver coating and surface slots. By adding a source-load coupling cell, a single monoblock filter with fully canonical transversal topology and three transmission zeros is achieved. A higher order filter is cascaded by combining two single monoblock filters with a microstrip line to improve selectivity and out-of-band rejections. The proposed filters offer wideband performance, low insertion loss, and a wide spurious-free window.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Martyna Mul, Maciej Jasinski, Adam Lamecki, Roberto Gomez-Garcia, Michal Mrozowski
Summary: This brief presents a general synthesis methodology for inline Nth-order microwave bandpass filters with frequency-variant reactive-type couplings. The proposed approach formulates the synthesis problem as three inverse nonlinear eigenvalue problems and builds the coupling matrix from their sets of eigenvalues. An optimization nonlinear least-squares procedure is used for this purpose. The effectiveness of the methodology is demonstrated through various synthesis examples and experimental validation.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
