Wideband Balanced Filters With Intrinsic Common-Mode Suppression on Coplanar Stripline-Based Multimode Resonators

Ouyang, Zhao‐An; Li, Zhu; Qiu, Lei‐Lei

doi:10.1109/tcsi.2022.3153500

Cited by 17 publications

(4 citation statements)

References 49 publications

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“…In 2,3 a wire bond method is used to eliminate a parasitic mode. In 11 ,a double split-ring resonator, and in 13,14,16 doublesided shunt-stub structure and SL-stub vertical coupling are used to suppress the spurious radiation. In 2 , for the odd mode, the circular open circuit is utilized to eliminate the parasitic mode, and for the even mode, a circular arrangement with a greater radius is utilized.…”

Section: Enlarging the Cps Stub Widthmentioning

confidence: 99%

“…A balanced CM suppression with a double-sided coplanar strip wideband is proposed in 12,13 . Three balanced microstrip-to-CPS transformations with excellent pure CM suppression and wideband DM filtering capabilities are presented in 13,14,15 and a miniaturized type of planar plasmonic waveguides with ultra-wideband filtering performance has been reported in 16 . The PIN diode modeling for re-configurable filters 17,18 and antenna 19,20 are integrated to form a multi-band operating filter.…”

Section: Introductionmentioning

confidence: 99%

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Design of Coplanar Stripline Bandpass Filter with Re-configurable Filter Switch

Basu,

Kho,

Nandi

2024

Preprint

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This paper has designed a bandpass filter using a coplanar stripline stub (CPS) resonator consisting of open and short-ended strip lines connected to the PIN Diode switches. The use of spurline stub resonators inside CPS results in bandpass and bandstop filters, depending on the PIN diode switch configurations. The work presents a novel circuit architecture aimed at reducing parasitic resonance of the spurline resonators and acquire the necessary series stub characteristics. The proposed filter resonates at 6.9-9 GHz and 1.7-4.7 GHz, and 8.4 GHz when the PIN diodes are forward and reverse-biased, respectively. It also resonates at 1-2.1 GHz, 4.8-5.3 GHz, and 6.9-9 GHz when one diode is reverse-biased, and the other is connected in forward bias. An insertion loss below -0.55 dB and a return loss less than 10dB have been obtained during simulation and measurement. The designed filter can find different applications for the 1.8 GHz GSM band, 2.4/5.8GHz (WLAN), 3.6 GHz (WiMAX), Long Term Evolution (LTE), and WIFI. The filter can be used in various multi-frequency systems owing to its compact size. The measured and simulated findings of the proposed CPS spurline stub resonator wideband bandpass filters are substantially consistent.

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Section: Enlarging the Cps Stub Widthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of Coplanar Stripline Bandpass Filter with Re-configurable Filter Switch

Basu,

Kho,

Nandi

2024

Preprint

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“…The design of these filters is relatively simple, but their size tends to be significant, as compared to other implementations of wideband balanced filters. Recently, wideband balanced filters based on coplanar stripline resonators with substantial CMRR in the differential-mode passband have been reported [130], [131], [132], [133], [134] (in the device presented in [130] the common mode is absorbed).…”

Section: A Wideband and Uwb Balanced Filtersmentioning

confidence: 99%

Balanced Microwave Transmission Lines, Circuits, and Sensors

Martín¹,

Medina

2023

IEEE J. Microw.

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This paper provides an overview of balanced (or differential-mode) structures operating at microwaves, including common-mode suppression filters, balanced filters and circuits with intrinsic common-mode suppression, and differential-mode sensors. The increasing interest for balanced structures within the framework of communication circuits and sensors, related to their major robustness against electromagnetic interference (EMI), noise, and environmental factors, is duly justified. Then the paper reports various approaches for the implementation of common-mode suppression filters, balanced filters and circuits (including narrowband and wideband filters, multi-band filters, power dividers, couplers and phase shifters), and differential-mode sensors (mainly devoted to the measurement of permittivity and related variables). Rather than providing a detailed analysis of the different considered implementations/approaches, the main goal of this review paper is to discuss, and compare in some cases, the main proposed strategies (pointed out in the up-to-date state-of-the-art) for optimizing the performance of the various differential-mode devices under study.

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“…Compared with single-ended devices, balanced circuits have better robustness to electromagnetic interference, noise, and crosstalk, so they have been widely implemented in low-frequency analog systems, high-speed digital systems, and radio frequency/microwave communication systems [1][2][3][4][5][6]. To date, a large variety of balanced filters have been explored [7][8][9][10][11][12][13][14][15]. Typically, the filters transmit single-input single-output single-ended signals, while the chips in the communication system transmit dual-input dual-output balanced signals.…”

Section: Introductionmentioning

confidence: 99%

General rotationally symmetric coupled feeding structure and its application to single- and dual-band balanced filters

Wang,

Gao,

Huang

et al. 2024

Phys. Scr.

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This paper proposes a new general rotationally symmetric coupled feeding structure and its applications to the design of single- and dual-band balanced filters for high common-mode (CM) suppression. The balanced feeder consists of two coupling lines coupled with a ring resonator, which can be either a uniform impedance ring resonator or a stepped impedance ring resonator. Under differential-mode (DM) excitation, the voltage distributions of the coupling-line and resonator are both rotationally even-symmetric and the total coupling coefficient adds up, which indicates that the proposed feeding structure can achieve DM transmission characteristic. Under CM excitation, their voltage distributions are rotationally even- and odd-symmetric, respectively, so the total coupling coefficient cancels out to zero and CM suppression property is achieved. For demonstration, four single- and dual-band balanced filters with wide range of CM and harmonic suppression are designed, fabricated, and measured, and the simulation and measured results match well.

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Wideband Balanced Filters With Intrinsic Common-Mode Suppression on Coplanar Stripline-Based Multimode Resonators

Cited by 17 publications

References 49 publications

Design of Coplanar Stripline Bandpass Filter with Re-configurable Filter Switch

Design of Coplanar Stripline Bandpass Filter with Re-configurable Filter Switch

Balanced Microwave Transmission Lines, Circuits, and Sensors

General rotationally symmetric coupled feeding structure and its application to single- and dual-band balanced filters

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