Article
Engineering, Electrical & Electronic
Mahmoud Abdel-Aziz, Anwer S. Abd El-Hameed, Amr A. Awamry, Ashraf S. Mohra
Summary: The paper presents a unique dual-band microstrip bandpass filter structure for GPS and TV broadcast auxiliary service applications, achieving compactness, low insertion loss, and small frequency separation through broadside-coupling techniques and CPW design. The filter design includes insertion of transmission zeros to achieve small 3-dB fractional bandwidth and overall structure size of 34.9 x 23.5 mm(2). The measured and simulated results show good agreement with 0.77 dB and 0.5 dB insertion loss, and FBW of 7.6% and 8.4% at 1.25 GHz and 1.9 GHz.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Abu Nasar Ghazali, Mohd Sazid, Srikanta Pal
Summary: This manuscript presents a low-cost ultra-wideband bandpass filter with quasi-elliptic response and multiple transmission zeros. The filter is based on a broadside coupled architecture and demonstrates good frequency characteristics.
Article
Engineering, Electrical & Electronic
Miguel A. Sanchez-Soriano, Cedric Quendo
Summary: A new technique for designing wideband bandpass filters is proposed in this work, which involves using shorter connecting lines in the filter topology to control coupling between resonators and increase the number of poles. The method allows for a proper selection of impedance values for filter design and was validated through the successful implementation of a fifth-order BPF with Chebyshev response.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Alexander Zakharov, Sergii Rozenko, Liudmyla Pinchuk, Sergii Litvintsev
Summary: The analysis of a second-order mixed-coupled bandpass filter of general form is conducted, exploring the position of transmission zeros, frequency dependence, and conditions for equidistant arrangement of transmission zeros between adjacent resonators. A fourth-order microstrip quazi-elliptic BPF is proposed to reduce parasitic interaction between nonadjacent resonators.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Tao Qin, Xian Qi Lin, Yu Lu Fan
Summary: The article presents two miniaturized multimode waveguide bandpass filters based on the epsilon-near-zero (ENZ) channel concept. The filters introduce multiresonance modes and one transmission zero, broadening the passband and upper stopband bandwidth. The design procedure and detailed miniaturization of the proposed BPFs are also presented.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Hesham A. Mohamed, Wael A. E. Ali, Ahmed A. Ibrahim
Summary: In this study, three filter models based on defected ground structure (DGS) techniques were designed, fabricated, and tested for various wireless applications. The filters were printed on a RO5880 substrate and achieved suggested band stop features for frequencies above 10 GHz by etching three DGSs. Good consistency between simulated and measured outcomes was observed for each filter, confirming their suitability for embedding in small-sized wireless devices.
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
(2023)
Article
Physics, Applied
Liguo Zhou, Wen Zhang, Ping Kwan Johnny Wong, Xudong Bai, Zhihe Long, Tianliang Zhang
Summary: An asymmetric cul-de-sac topology filter prototype is synthesized and designed in this paper. It is suitable for designing high-temperature superconducting narrowband filters with high selectivity sideband suppression and symmetrical frequency response about the central frequency. The filter has fewer coupling coefficients and resonator types, making it convenient for designing high-order HTS filters with temperature shifts.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Jonathan M. M. Knowles, Hjalti H. H. Sigmarsson, Jay W. W. McDaniel
Summary: In this article, a generalized theory of bandpass filtering attenuators (filtenuators) is proposed, which combines the frequency-selective characteristics of a filter and the loss-programmable characteristics of an attenuator into a single component. A loss-programmable, third-order Chebyshev bandpass filtenuator is designed, fabricated, and measured to verify the theory. The proposed filtenuator offers a tunable, low-cost, size, weight, and power (C-SWaP) solution to increase radio frequency (RF) system dynamic range, and provides a design process for future development of filtenuators.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Yun-Peng Lyu, Yu-Jin Zhou, Lei Zhu, Chong-Hu Cheng
Summary: In this paper, compact and high order on-chip wideband bandpass filters (BPFs) are proposed in the gallium arsenide (GaAs)-based integrated passive device (IPD) technology. The design utilizes a stepped-impedance multimode resonator to achieve a bandwidth of more than five octaves, with a high rejection to higher-order frequencies in the passband. The use of Metal-Insulator-Metal (MIM) capacitors and spiral inductors allows for a very small chip size. The paper also presents equivalent circuit models and design equations, and demonstrates the performance of a fabricated fourth-order prototype.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Mohd Sazid, N. S. Raghava
Summary: This manuscript reports a planar ultra-wideband bandpass filter with multiple passband transmission zeros and wide stopband. The filter architecture consists of microstrip-to-coplanar waveguide transitions and defected ground structures to achieve optimal frequency characteristics. Through simulation and measurement, a prototype with compatible frequency characteristics is developed.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Soheil Karimi Bavandpour, Saeed Roshani, Ali Pirasteh, Sobhan Roshani, Hosein Seyedi
Summary: A compact lowpass-dual bandpass microstrip diplexer was designed in this paper, utilizing T-shaped resonator, ring resonator, and meandered lines for superior performance in terms of compact size, simple structure, low insertion loss, and high output ports isolation. The diplexer included a low pass filter with 2.3 GHz cutoff frequency and a dual-band, band pass filters with pass bands at 3 GHz and 6.2 GHz, showing low insertion losses in both bands. The fabricated diplexer demonstrated more than 20 dB output ports isolation with miniaturized dimensions.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Bin Liu, Kun Li, Xiong Chen, Pei-Ling Chi, Tao Yang
Summary: A synthesis method of N th-order wideband bandpass filter (BPF) with cross-coupled or inline topology using inductive-and capacitive-coupling components is presented. The proposed method transforms negative inductive-coupling elements into negative capacitive-coupling elements, allowing for direct implementation using lumped elements. The method is demonstrated through numerical examples and can be applied to N th-order wideband BPF with multiple transmission zeros (TZs).
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
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
Mohd Sazid, N. S. Raghava, Abu Nasar Ghazali
Summary: A miniaturized ultra-wideband (UWB) bandpass filter with multiple passband notches based on broadside coupled technology is presented. The proposed filter consists of microstrip lines on the top plane coupled to the modified short-circuited coplanar waveguide on the bottom plane. The presence of two transmission zeros at the lower/upper passband edges is achieved through broadside alignment, resulting in a UWB response with good frequency characteristics. Moreover, the addition of multiple circular resonators and a complimentary folded split ring resonator create triple passband notches at the desired frequencies.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2023)
Article
Chemistry, Physical
Shupeng Sun, Yongzhi Cheng, Hui Luo, Fu Chen, Xiangcheng Li
Summary: In this paper, a notched-wideband bandpass filter based on spoof surface plasmon polaritons (SSPPs) with loaded resonator structure is proposed. The dispersion and transmission properties of the designed filter are analyzed and compared, showing wide passband and notch-band transmission properties.
