Proposal and Synthesis Design of Differential Phase Shifters With Filtering Function

Lyu, Yun‐Peng; Li, Zhu; Cheng, Chonghu

doi:10.1109/tmtt.2017.2673819

Cited by 64 publications

(29 citation statements)

References 21 publications

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“…As a disadvantage for the above designs , to achieve various phase shifts, it is necessary to employ different reference lines. This problem is solved in [24][25][26][27][28] by using a fixed reference line for any desired phase shift.…”

Section: Introductionmentioning

confidence: 99%

Simple ladder‐like single‐layer balanced wideband phase shifter with wide phase shift range and appropriate common‐mode suppression

Alizadeh¹,

Shamsi

Tavakoli³

et al. 2020

IET Microwaves, Antennas & Propagation

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In this study, a single‐layer balanced wideband phase shifter with a wide phase shift range of 45°–315° and acceptable common‐mode (CM) suppression is proposed. The main branch has a simple ladder‐like structure and the reference branch utilises a coupling structure. The main branch electrical length is constant for any desired differential‐mode (DM) phase shift. Assuming a specific return loss (e.g. 16, 20, and 25 dB), the phase shifter is carefully analysed and a design procedure is given leading to an ultra‐low phase error design. Then by making a trade‐off between the CM and DM bandwidths at the cost of higher phase error, more design solutions for the phase shifter are given. To validate both the proposed structure as well as its design procedure, a balanced wideband phase shifter with the DM phase shift of 180°±4.2° (1.851–4.017 GHz) and the CM suppression of better than 15 dB (1.81–4 GHz) is fabricated, resulting in 73.82 and 75.25% fractional bandwidth, respectively. The fabricated balanced phase shifter has a return loss of ||S11dd<−14.87thinmathspacedB and insertion loss of ||S21dd>−0.95thinmathspacedB. The synthesised, simulated, and measured results are in good agreement with each other.

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Section: Introductionmentioning

confidence: 99%

Simple ladder‐like single‐layer balanced wideband phase shifter with wide phase shift range and appropriate common‐mode suppression

Alizadeh¹,

Shamsi

Tavakoli³

et al. 2020

IET Microwaves, Antennas & Propagation

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show abstract

“…because of the extra stubs or large size of the resonators. Some designs can reduce the circuit size to a certain degree such as the phase shifters using Schiffman structure [9]- [11], high/low impedances technique [12], [13], coupled U-shaped resonators [14], or self-coupled and broadside-coupled lines [15]. Some designs can greatly reduce the size of the phase shifters by using all lumped-elements structure [16], coupled lines with lumped-elements [17], [18], or multisection coupled lines [19].…”

Section: Introductionmentioning

confidence: 99%

A Compact Balanced Phase Shifter With Wideband Common-Mode Suppression

2019

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In this paper, a balanced phase shifter using cascaded three microstirp lines and two coupled lines is proposed. The reference line is fixed without center delay line. With such configuration, wideband differential-mode (DM) phase shift can be achieved. The coupled line and half-wavelength microstrip line provide the out-of-band and in-band common-mode (CM) suppression, respectively. Compared with the state-of-the-art balanced phase shifters, the proposed balanced phase shifter has the advantages of wideband CM suppression and compact size with simple structure and fixed reference line. Theoretic analysis, parametric study and design procedure are carried out completely. To verify the theoretic prediction, two prototypes covering the frequency of 1.8 GHz are designed with the relative operating bandwidth for 45 • ± 2.1 • (90 • ± 3.7 •) phase shifter of 50% (53%), with the minimum return loss better than 14.7 dB, and the relative CM suppression bandwidth better than 150%.

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“…However, its bandwidth cannot be controlled as required so that filtering function is strictly restricted. In [17], the phase properties of the generalised nth-order BPF network are investigated and a differential phase shifter with selfembedded filtering function was firstly proposed. However, this design is only suitable for a narrow bandwidth and the cascaded single-mode resonators increase its overall circuit size.…”

Section: Introductionmentioning

confidence: 99%

“…However, this design is only suitable for a narrow bandwidth and the cascaded single-mode resonators increase its overall circuit size. Besides, it should be pointed out that the different bandwidth of main and reference lines may seriously deteriorate the frequency selectivity of filtering differential phase shifters in [16,17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis design of filtering wideband differential phase shifters on multimode resonators with controllable same insertion loss bandwidth

Lyu

Cheng

2017

IET Microwaves, Antennas & Propagation

Self Cite

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A new class of wideband differential phase shifters employing two distinctive multimode resonators both in main and reference lines is presented. Compared with their counterparts, the proposed phase shifter firstly can achieve wideband phase shift and good filtering function with controllable same insertion loss (IL) bandwidth in main and reference lines as required. To design two phase‐shifting elements with design indices (phase‐shift value, return loss, and operating bandwidth), an effective synthesis method is presented and sets of design curves are graphically demonstrated. Prototype phase shifters are then fabricated and measured. Finally, the design approach is validated experimentally. It is shown that the proposed phase shifters achieve 90° ± 2.3° and 45° ± 2.0° over the prescribed band 2.26–3.72 GHz (48%) and 2.04–4.03 GHz (66%). The good frequency selectivity with the same IL bandwidth is obtained and out‐of‐band rejection is >30.2 and 26.4 dB up to 7.0 GHz.

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Proposal and Synthesis Design of Differential Phase Shifters With Filtering Function

Cited by 64 publications

References 21 publications

Simple ladder‐like single‐layer balanced wideband phase shifter with wide phase shift range and appropriate common‐mode suppression

Simple ladder‐like single‐layer balanced wideband phase shifter with wide phase shift range and appropriate common‐mode suppression

A Compact Balanced Phase Shifter With Wideband Common-Mode Suppression

Synthesis design of filtering wideband differential phase shifters on multimode resonators with controllable same insertion loss bandwidth

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