A Size-Reduced Tri-Band Gysel Power Divider With Ultra-Wideband Harmonics Suppression Performance

Liu, Fuxing; Wang, Yang; Zhang, Xiao‐Yu; Quan, Chun-He; Lee, Jong‐Chul

doi:10.1109/access.2018.2846296

Cited by 25 publications

(10 citation statements)

References 34 publications

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“…Many transmission lines and stub lines can make up dual-band PDs together [4], [5], obviously calculations become complex due to the extra circuit structures. Some designs use λ/4 open stubs to introduce transmission zeros to isolate operation frequencies [6]- [8]. But there is a disadvantage that additional open stubs enlarge the size.…”

Section: Introductionmentioning

confidence: 99%

A Compact Tri-Band Impedance-Transforming Power Divider With Independent Controllable Power Division Ratios and Enhanced Bandwidths

Yang

Hu²,

Xie³

et al. 2019

IEEE Access

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In this paper, a tri-band impedance transformer (TBIT) using a coupled line and a dual-band to tri-band transformer is proposed, which can transform frequency-dependent complex impedances to a real-value impedance. In order to explain how to determine circuit parameters, closed-form equations are derived in detail. Based on the TBIT, a compact T-junction power divider (TTPD) is designed. This TTPD works at three different frequencies with independent controllable power division ratios. Simple steps to design the TTPD are listed. To demonstrate the validity of the theory, this paper exhibits a prototype operating at 2, 4.4, and 5 GHz with different power division ratios. Moreover, the simulated and measured results prove that this TTPD has the features of tri-band operation, independent controllable power division ratios, enhanced bandwidths, and small size. INDEX TERMS Independent controllable power division ratios, tri-band, impedance transformer, power divider.

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Section: Introductionmentioning

confidence: 99%

A Compact Tri-Band Impedance-Transforming Power Divider With Independent Controllable Power Division Ratios and Enhanced Bandwidths

Yang

Hu²,

Xie³

et al. 2019

IEEE Access

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“…Besides, harmonic suppression can improve the signal-to-noise ratio of the communication system, which is also a hot research spot for microwave components. To achieve harmonic suppression, these methods are proved to be effective, such as using an ultra-wideband band-stop filter [9], an electromagnetic bandgap [10], open stubs [11], a defected ground structure [12], and inductively loaded slow-wave transmission lines [13].…”

Section: Introductionmentioning

confidence: 99%

Compact Microwave Components with Harmonic Suppression Based on Artificial Transmission Lines

Huang

et al. 2019

International Journal of Antennas and Propagation

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In this paper, compact microwave components, including a Wilkinson power divider and a 3 dB branch-line coupler based on artificial transmission lines (ATLs) with harmonic suppression, are presented. A section ATL is consisted of microstrip stepped impedance transmission lines and a microstrip interdigital capacitor. To achieve a compact size, the stepped impedance transmission lines are folded into a right-angled triangle shape. For the ATL, the interdigital capacitor is used to suppress harmonics. By employing two sections of 70.7 Ω ATLs with a right-angled triangle shape to replace conventional transmission lines, the proposed power divider working at 0.9 GHz achieves a size miniaturization with the 58.8% area of a conventional case. In addition, the power divider has good harmonic suppression performance. In the design of a branch-line coupler, two pairs of ATLs with 50 Ω and 35.4 Ω are utilized. For 50 Ω ATLs, the ATLs are designed to a right-angled triangle shape. Meanwhile, to obtain a more compact size, these 35.4 Ω ATLs are modified to an isosceles trapezoid shape. The proposed branch-line coupler operating at 0.9 GHz accounts for merely 33.4% of a coupler adopting conventional microstrip transmission lines. Moreover, the harmonics of a branch-line coupler are suppressed effectively as well. Finally, measured results of the proposed Wilkinson power divider and branch-line coupler display good performance and agree with their simulated results well.

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“…However, there still have some disadvantages such as narrow bandwidth, bulk size, so forth. As an inevitable device in microwave systems, many new planar types of Gysel PDs are proposed . In Refs.…”

Section: Introductionmentioning

confidence: 99%

“… the composite right‐/left‐handed (CRLH) transmission lines (TLs) are employed, while in Ref. is the slow‐wave TL. As for Refs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A size reduced Gysel power divider with simple structure and high design flexibility

Liu

Wang

Lee

2019

Micro & Optical Tech Letters

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In this letter, a new simple structure of Gysel power divider (PD) is proposed. Comparing to the conventional Gysel PD, the high‐power handling capability is reserved with size reduction from the nonlinear relationship between the phase delay and the physical dimension of the utilized open‐circuited coupled line. The structure is analyzed according to an open‐end‐stub‐based equivalent circuit, in which procedure the closed‐form design equations are derived simultaneously. Also, the analysis shows a high design freedom in choosing the values of the isolation resistors and the impedances of the utilized transmission lines (TLs), which property can be used to control the bandwidth (isolation and input return loss band) of the proposed structure. Finally, in order to verify the proposed design theory, a Gysel PD with a center frequency of 2.5 GHz is designed, simulated, fabricated, and characterized. Besides good agreement with the simulation data, the experimental results show that the proposed PD features a wide isolation band which is around 89% with the reference of 15‐dB loss.

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A Size-Reduced Tri-Band Gysel Power Divider With Ultra-Wideband Harmonics Suppression Performance

Cited by 25 publications

References 34 publications

A Compact Tri-Band Impedance-Transforming Power Divider With Independent Controllable Power Division Ratios and Enhanced Bandwidths

A Compact Tri-Band Impedance-Transforming Power Divider With Independent Controllable Power Division Ratios and Enhanced Bandwidths

Compact Microwave Components with Harmonic Suppression Based on Artificial Transmission Lines

A size reduced Gysel power divider with simple structure and high design flexibility

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