Wideband Balanced Filters With Intrinsic Common-Mode Suppression Using Coplanar Strip Double-Sided Shunt-Stub Structures

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

doi:10.1109/tmtt.2021.3077268

Cited by 19 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enlarged stub width has increased the capacitance lowered the resonant frequency, and suppressed the parasitic modes. The proposed filter offered a higher selectivity of up to 37 dB in the lower and upper bands which is significantly higher than that of the reported values presented in 2,3,12,13 . Without wire bonds or air bridges, the structure has offered wider bandwidth and prohibited the parasitic modes.…”

Section: Introductioncontrasting

confidence: 67%

“…The RT/Duroid 5880 substrate is utilized to design the circuit having a 35 m thick copper layer, 0.787 mm substrate height (h), and 2.2 dielectric constants ( ). 1 Describes analytical procedures for estimating the effective dielectric constant, characteristic impedance 7 , and dielectric and conductor losses of the CPS 11,12 . The study takes into account the quasi-TEM closed-form characteristics of the CPS on a fixed substrate height.…”

Section: Analysis Of Cps Characteristicsmentioning

confidence: 99%

“…In 11 , a coupled split-ring resonator to coplanar stripline has been demonstrated as a bandstop filter. 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 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Basu,

Kho,

Nandi

2024

Preprint

View full text Add to dashboard Cite

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.

show abstract

Section: Introductioncontrasting

confidence: 67%

Section: Analysis Of Cps Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Basu,

Kho,

Nandi

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…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.

View full text Add to dashboard Cite

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.

show abstract

“…Many approaches have been proposed to implement the differential bandpass filter. A so-called microstrip-to-slotline transition structure is utilized to realize the balanced bandpass filter [1][2][3]. When a differential-mode signal is inputted from two ends of the microstrip-line, the equivalent electric wall at the symmetrical position makes the microstrip-line have a virtual electrical contact with the slotline, thus, the differential-mode signal can be transmitted from the microstrip-line to the slot-line.…”

Section: Introductionmentioning

confidence: 99%

A Simple Balanced Bandpass Filter Using Loop-type Microstrip Resonator Loaded with Shorted/Opened Stubs

Yan¹,

Xiao²,

Cao³

2022

PIER Letters

View full text Add to dashboard Cite

A simple balanced bandpass filter is presented. It is constructed mainly by a loop-type resonator with loaded shorted/opened stubs. The resonator is fed by the balanced coupled-line structure. In the loop-type resonator, three approaches can be simultaneously utilized to achieve high commonmode suppression. One is that the loop-type resonator has different differential/common-mode resonant frequencies, which results in a good in-band common-mode suppression. The second is that the loaded short stubs with different lengths will make the input/output port couplings to have different coupling strengths, which will deteriorate the common-mode bandpass response. The third is that loading the grounded resistors can effectively dissipate the common-mode signal. Meanwhile, loading the grounded resistors in the balanced coupled-line structure can effectively dissipate the reflective common-mode signal. A detailed description about its structure, operational mechanism, and design method is given. For demonstration, a prototype balanced bandpass filter working at 2.4 GHz is designed, fabricated, and measured. A high in-band common-mode suppression of 49 dB is achieved. The measured and simulated results can verify the effectiveness of the proposed balanced bandpass filter and the design method.

show abstract

Wideband Balanced Filters With Intrinsic Common-Mode Suppression Using Coplanar Strip Double-Sided Shunt-Stub Structures

Cited by 19 publications

References 39 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

A Simple Balanced Bandpass Filter Using Loop-type Microstrip Resonator Loaded with Shorted/Opened Stubs

Contact Info

Product

Resources

About