Design Methodology for Six-Port Equal/Unequal Quadrature and Rat-Race Couplers With Balanced and Unbalanced Ports Terminated by Arbitrary Resistances

Jiao, Lingxiao; Wu, Yongle; Zhang, Weiwei; Li, Mingxing; Liu, Yuanan; Xue, Quan; Ghassemlooy, Zabih

doi:10.1109/tmtt.2017.2778108

Cited by 32 publications

(11 citation statements)

References 24 publications

(24 reference statements)

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“…By equating the real and imaginary parts of Equations (8) and (9), the perfect impedance matching and isolation conditions for the proposed power divider can be found as…”

Section: B Analysis Of Impedance Matching and Isolation Conditionsmentioning

confidence: 99%

Dual-Band Balanced-to-Unbalanced Power Divider With Independent Power Division Ratios

Zhu

Wang

et al. 2020

IEEE Access

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A dual-band balanced to unbalanced power divider with independent power division ratios (PDRs) at two operating frequencies is proposed in this paper. The proposed power divider includes a dual-band phase inverter, a grounded resistor, and four transmission-line sections (TLS). By simultaneously changing characteristic impedances and electrical lengths of the four TLS, the independent PDRs are obtained, and the large-signal output port at lower and upper operation bands can be different. Compared to the previous works, it has more flexibility in the power division. Moreover, the closed-form design equations are provided and discussed. To verify the proposed structure, two BTU power dividers operating at 1.0 and 2.0 GHz are designed, fabricated, and measured. The PDRs of the first power divider are-6 and 6 dB for the lower and upper operation bands, respectively. The second power divider has the PDRs of 3 and-6 dB. The measured results are good agreements with the theoretical calculation and electromagnetic simulation. INDEX TERMS Balanced to unbalanced, dual-band, independent power division ratios, power divider.

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“…By equating the real and imaginary parts of Equations (8) and (9), the perfect impedance matching and isolation conditions for the proposed power divider can be found as…”

Section: B Analysis Of Impedance Matching and Isolation Conditionsmentioning

confidence: 99%

Dual-Band Balanced-to-Unbalanced Power Divider With Independent Power Division Ratios

Zhu

Wang

et al. 2020

IEEE Access

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“…However, most of the reported balanced FRCs are BTB components, which are only applied to fully balanced systems. Considering the connection and coexistence between balanced and unbalanced systems, BTU FRCs are indispensable [17][18][19]. The first BTU rat-race-coupler is presented based on microstrip transmissionline in [17].…”

Section: Introductionmentioning

confidence: 99%

Balanced‐to‐unbalanced and balanced‐to‐balanced filtering rat‐race couplers using multilayer substate integrated waveguide cavities

Wang

Zhou

Zhang

et al. 2021

IET Microwaves Antenna & Prop

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This study reports a class of balanced-to-unbalanced (BTU) and balanced-to-balanced (BTB) filtering rat-race couplers (FRCs) based on multilayer substrate integrated waveguide (SIW) cavities. Input and output ports can perform the functions of balanced and unbalanced terminals to implement various operating states. The theoretical designs consisting of the mixed-mode scattering matrix and mode analysis are discussed in detail. Good differential-mode (DM) bandpass filtering (BPF) responses are obtained by two pairs of orthogonal degenerate modes in multilayer SIW cavities. Meanwhile, high common-mode (CM) suppression and port-to-port isolation are realized inherently due to mode distributions of the square SIW resonator. Accordingly, to verify the design concept, two types of BTU FRCs and one type of BTB FRC are designed and fabricated, respectively. Moreover, the measured results agree well with the simulated ones, exhibiting high performances in terms of CM suppression, magnitude/phase imbalance as well as port matching/isolation characteristics. K E Y W O R D Sbalanced-to-balanced, balanced-to-unbalanced, filtering rat-race couplers, substate integrated waveguideThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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“…Some balanced to single-ended (BTSE) or single-ended to balanced (SETB) couplers are also reported lately. In [2], the six-port quadrature and rat-race BTSE/SETB couplers with arbitrary PDRs and terminated resistances are proposed for the first time. In [3], a compact SETB four-section coupled-line coupler with inherent impedance matching and arbitrary PDRs is proposed.…”

Section: Introductionmentioning

confidence: 99%

A balanced-to-balanced directional coupler based on branch-slotline coupled structure

et al. 2020

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In this paper, a balanced-to-balanced (BTB) branch-slotline directional coupler (DC) is firstly presented, which can realize an arbitrary power division ratios (PDRs). The coupler is composed by microstrip-to-slotline (MS) transition structures and branch-slotline coupled structures. The single-ended to balanced-ended conversion is simplified and easy to implemented by the MS transition structures, which intrinsically leads to the differential-mode (DM) transmission and common-mode (CM) suppression. Moreover, the different PDRs which are controlled by the widths of branch-slotlines can be achieved. In order to verify the feasibility of the proposed design method, two prototype circuits of the proposed coupler with different PDRs are fabricated and measured. The return loss and the isolation of two designs are all better than 10 dB. Moreover, the CM suppressions are greater than 35 dB. A good agreement between the simulation and measurement results is observed.

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Design Methodology for Six-Port Equal/Unequal Quadrature and Rat-Race Couplers With Balanced and Unbalanced Ports Terminated by Arbitrary Resistances

Cited by 32 publications

References 24 publications

Dual-Band Balanced-to-Unbalanced Power Divider With Independent Power Division Ratios

Dual-Band Balanced-to-Unbalanced Power Divider With Independent Power Division Ratios

Balanced‐to‐unbalanced and balanced‐to‐balanced filtering rat‐race couplers using multilayer substate integrated waveguide cavities

A balanced-to-balanced directional coupler based on branch-slotline coupled structure

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