A new microstrip coupling system for realization of a differential dual-band bandpass filter

Karimi, Gholamreza; Amirian, Mohsen; Lalbakhsh, Ali; Ranjbar, Mehdi

doi:10.1016/j.aeue.2018.11.004

Cited by 33 publications

(16 citation statements)

References 22 publications

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“…The even-odd mode analysis method has a good application in the design of microwave passive circuits and is widely used in the symmetrical circuits of two-port filters and three-port power dividers. [25][26][27][28] The network is divided into two identical networks by a symmetric reference plane. In the odd-mode state, the reference surface is equivalent to an ideal electric wall, which is equivalent to a short circuit.…”

Section: Even-mode Analysismentioning

confidence: 99%

Compact wideband Wilkinson power divider on gallium arsenide‐based integrated passive device technology

Jiang

Feng

et al. 2021

Int J RF Mic Comp-Aid Eng

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In this article, a novel topology of wideband on-chip Wilkinson power divider (WPD) with good insertion loss (IL) performance is proposed and demonstrated on gallium arsenide (GaAs)-based integrated passive device (IPD) technology. The proposed WPD is further analyzed by the even and odd method.To verify the advantage of the proposed WPD against the conventional one, two examples are numerically investigated, showing that the proposed one achieves better performance in terms of IL and isolation. In addition, the proposed design achieves a miniature area and small amplitude and phase imbalance (AI) performance. The fractional bandwidth (FBW) of the proposed WPD is 100% (6-18 GHz), where the magnitude imbalance is less than 0.08 dB and phase imbalance is better than 0.4 . Furthermore, the minimum IL is better than 0.96 dB and return loss is better than 13.7 dB within the core passband. Meanwhile, the isolation of the WPD is better than 17.6 dB. Finally, to further demonstrate our design conception, the proposed WPD has been fabricated on GaAs IPD technology with size of 1.5 Â 0.9 mm 2 , and measured by on-wafer probing. All the simulated and measured results of the proposed WPD are matched reasonably well with each other, thus firmly validating the claimed superior performance of the proposed WPD in the wide operating bandwidth, low IL, and high isolation.

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Section: Even-mode Analysismentioning

confidence: 99%

Compact wideband Wilkinson power divider on gallium arsenide‐based integrated passive device technology

Jiang

Feng

et al. 2021

Int J RF Mic Comp-Aid Eng

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“…Table 2 summarises performance comparisons for the presented dual-band differential microstrip BPFs. High temperature Karimi et al [72] proposed a new coupling system named unequal two coupled U-shaped structure (TCUS) and applied to design a dual-band differential microstrip BPF with independently controllable passbands. To improve the suppression level in the differential mode and the common-mode rejection ratio, third-order Sierpinski fractal design was utilized on the I-shaped transmission line.…”

Section: Dual-band Differential Microstrip Bpfsmentioning

confidence: 99%

A Survey of Differential-Fed Microstrip Bandpass Filters: Recent Techniques and Challenges

Al‐Yasir

Parchin

Abdulkhaleq

et al. 2020

Sensors

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Differentially driven devices represent a highly promising research field for radio frequency (RF), microwave (MW), and millimeter-wave (mmWave) designers and engineers. Designs employing differential signals are essential elements in low-noise fourth-generation (4G) and fifth-generation (5G) communications. Apart from the conventional planar MW components, differential-fed balanced microstrip filters, as promising alternatives, have several advantages, including high common-mode rejection, low unwanted radiation levels, high noise immunity, and wideband harmonic suppression. In this paper, a comprehensive and in-depth review of the existing research on differential-fed microstrip filter designs are presented and discussed with a focus on recent advances in this research and the challenges facing the researchers. A comparison between different design techniques is presented and discussed in detail to provide the researchers with the advantages and disadvantages of each technique that could be of interest to a specific application. Challenges and future developments of balanced microstrip bandpass filters (BPFs) are also presented in this paper. Balanced filters surveyed include recent single-, dual-, tri-, and wide-band BPFs, which employ different design techniques and accomplish different performances for current and future wireless applications.3 of 25 between these designs follow each section. Section 6 shows the challenges and future development of differential-fed microstrip BPFs. Finally, Section 7 presents the conclusion of our review. Single-Band Differential Microstrip BPFsRecently, many single-band differential planar BPFs based on different techniques have been reported [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. The main difference between these designs is the structures utilized. Several types of resonators and techniques can be used to obtain a single-band differential planar BPF with different performance. Generally, the common-mode noise suppression is an interesting topic for high-speed and high-frequency wireless applications. The common-mode noise signals can degrade the differential-mode transmitted signals as well as the entire power of such wireless applications. To suppress the common-mode signals, some researchers and engineers have proposed the use of a series of combinations of single-band differential-fed planar filters and transmission lines [39]. However, this technique will lead to a large area and so not suitable for new demands of compact systems. However, Ebrahimi et al. have proposed a new balanced BPF using dumbbell-shaped defected ground structures (DGSs) [42]. The proposed DGS resonator provides the option of implementing higher-order differential filters. Also, in comparison with similar techniques such as S-shaped complementary split-ring resonators (CSRRs), which have similar structures in common-mode and differential mode transmission [39], differential filters based on DGSs provide high common-mode attenuation by utilizing two separate equiv...

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“…Examples of these designs include cascaded stepped-impedance resonators [2][3][4], open stubs filters [5], open loop resonators [6,7], T-shaped resonators [8], and cascaded split-ring resonators [9]. Several design techniques for controlling the resonances by means of even and odd mode analysis [10,11], or the frequency response by using an analysis of the transfer function [12,13], have been proposed. Defected ground structures (DGSs) have also been applied to the design of filters [14,15] to introduce additional resonances and to improve their frequency responses.…”

Section: Introductionmentioning

confidence: 99%

Compact Double Notch Coplanar and Microstrip Bandstop Filters Using Metamaterial—Inspired Open Ring Resonators

2021

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Compact double notch coplanar and microstrip bandstop filters are described. They are based on a version of the open interconnected split ring resonator (OISRR) integrated in microstrip or coplanar waveguides. The OISRR introduces an RLC resonator connected in parallel with the propagating microstrip line. Therefore, this resonator can be modeled as a shunt circuit to ground, with the R, L and C elements connected in series. The consequence for the frequency response of the device is a notch band at the resonant frequency of the RLC shunt circuit. The number of notch bands can be controlled by adding more OISRRs, since each pair of rings can be modeled as a shunt circuit and therefore introduces an additional notch band. In this paper, we demonstrate that these additional rings can be introduced in a concentric way in the same cell, so the size of the device does not increase and a compact multi-notch bandstop response is achieved, with the same number of notch bands as pairs of concentric rings, plus an additional spurious band at a higher frequency.

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A new microstrip coupling system for realization of a differential dual-band bandpass filter

Cited by 33 publications

References 22 publications

Compact wideband Wilkinson power divider on gallium arsenide‐based integrated passive device technology

Compact wideband Wilkinson power divider on gallium arsenide‐based integrated passive device technology

A Survey of Differential-Fed Microstrip Bandpass Filters: Recent Techniques and Challenges

Compact Double Notch Coplanar and Microstrip Bandstop Filters Using Metamaterial—Inspired Open Ring Resonators

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