A High-Performance Dual-Mode Filtering Power Divider With Simple Layout

Zhang, Gang; Wang, Xuedao; Yang, Jiquan

doi:10.1109/lmwc.2018.2789821

Cited by 49 publications

(34 citation statements)

References 8 publications

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“…An ultra‐wideband FPD was first developed by directly cascading a filtering structure to a traditional Wilkinson power divider, yet the circuits may cover a fairly large area. An alternative approach is to replace the quarter‐wavelength (λ/4) transformer with coupled, dual‐mode or multimode resonators in the traditional Wilkinson power divider . Similarly, in order to promote concurrent dual‐band microwave communication systems, a number of dual‐band FPDs are designed by utilizing the same approach.…”

Section: Introductionmentioning

confidence: 99%

“…An alternative approach is to replace the quarterwavelength (λ/4) transformer with coupled, dual-mode or multimode resonators in the traditional Wilkinson power divider. [8][9][10][11][12][13] Similarly, in order to promote concurrent dual-band microwave communication systems, a number of dual-band FPDs are designed by utilizing the same approach. In References 14-20, a few dual-band FPDs are realized by replacing the λ/4 transformers in the traditional Wilkinson power divider with dual-mode, multimode resonators, or band-pass filters.…”

Section: Introductionmentioning

confidence: 99%

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Dual‐band filtering power divider with unequal power division ratio and low‐loss characteristic

Shao

Zhu

et al. 2020

Int J RF Microw Comput Aided Eng

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In this article, a dual‐band filtering power divider with unequal power‐division ability is proposed. Different from conventional equal power dividers constructed by filters or coupled resonators, noncoupled structures are employed in this design. As a result, low‐loss characteristic is realized for the proposed power divider. In this proposed structure, the dual‐band unequal power allocation is realized by replacing conventional single‐band λ/4 transformers with dual‐band ones (T‐junction structures). Three identical λ/4 stepped impedance resonators are properly attached to all the three ports of the proposed power divider to generate an extra transmission zero between two operational bands. Therefore, a filter‐like shaping in its S‐parameter results is obtained. A resistor is located between two outputs for output isolation. Mathematical derivations of the overall design procedure are also provided based on the circuit models and transmission line theory. Meanwhile, a resistor for output isolation is also included between two outputs, whose value can be calculated using given equations. For validation, a prototype operating at 0.9 and 2.1 GHz are designed, fabricated, and measured. The isolations between two outputs are 30 and 26 dB while the phase differences are only 2.5°and 4.9° at 0.9 and 2.1 GHz in the measurement, indicating good consistence of outputs. Measured |S21| and |S31| are −(1.76 + 0.3) dB, −(4.77 + 0.2) dB at 0.9 GHz and −(1.76 + 0.6) dB, −(4.77 + 0.5) dB at 2.1 GHz.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual‐band filtering power divider with unequal power division ratio and low‐loss characteristic

Shao

Zhu

et al. 2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

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“…As shown in Figure 1A, in RF frontends, diplexer is usually cascaded with Wilkinson power divider (WPD), which may lead to large circuit size and more insertion losses (ILs). To improve the integrations in Figure 1A, extensive studies [7][8][9][10][11][12][13] are conducted to integrate bandpass filter (BPF) into WPD, that is, filtering power divider (FPD). Various characteristics are realized in those FPDs, such as single-band FPD, 7,8 dual-band unequal FPD, 9 wideband FPD, 10 singleended-to-balanced FPD, 11 and reconfigurable FPD.…”

Section: Introductionmentioning

confidence: 99%

“…To improve the integrations in Figure 1A, extensive studies [7][8][9][10][11][12][13] are conducted to integrate bandpass filter (BPF) into WPD, that is, filtering power divider (FPD). Various characteristics are realized in those FPDs, such as single-band FPD, 7,8 dual-band unequal FPD, 9 wideband FPD, 10 singleended-to-balanced FPD, 11 and reconfigurable FPD. 12,13 All the abovementioned works [1][2][3][4][5][6][7][8][9][10][11][12][13] show good performance.…”

Section: Introductionmentioning

confidence: 99%

“…Various characteristics are realized in those FPDs, such as single-band FPD, 7,8 dual-band unequal FPD, 9 wideband FPD, 10 singleended-to-balanced FPD, 11 and reconfigurable FPD. 12,13 All the abovementioned works [1][2][3][4][5][6][7][8][9][10][11][12][13] show good performance. However, as shown in Figure 1B, if diplexer, which is constituted by two different BPFs, is integrated into two different WPDs, more circuit sizes and mismatching less of RF receiver can be further reduced.…”

Section: Introductionmentioning

confidence: 99%

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Design of diplexer‐integrated filtering power divider with high isolation

Zhu

Zhang

2019

Micro & Optical Tech Letters

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A compact size and high isolation diplexer‐integrated filtering power divider (D‐IFPD) is presented in this study. The proposed multifunctional circuit consists of one distributed coupling feeding line, two different stub‐loaded trimode resonators, and two open‐ended three‐line parallel coupled lines. With the utilization of the distributed coupling technique, no additional matching circuit is needed for D‐IFPD design. The measured results show that the proposed D‐IFPD is centered at 1.67/2.17 GHz with 3‐dB fractional bandwidths of 18.0%/12.9%, less than 0.73/1.24 dB insertion losses, better than 16.5/15 dB return losses, and higher than 35.9 dB isolation.

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Filtering balanced-to-single-ended power dividing network

Zhang

et al. 2018

Int J RF Microw Comput Aided Eng

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In this article, the filtering balanced‐to‐single‐ended power dividing networks are proposed. Except the fundamental functions of differential‐mode transmission, common‐mode suppression, and out‐of‐phase single‐ended output ports with isolation, the proposed designs show the advantages of wide controllable range of differential‐mode bandwidth, multiple transmission zeros (TZs), and wide bandwidth for high out‐of‐band suppression. The frequencies of TZs, bandwidth, isolation, and common‐mode suppression can be controlled by the parameters. For demonstration, three prototypes (Deigns I, II, and III) with two, four, or six TZs are implemented. The measured results show that design I (II and III) has an insertion loss of 0.38 dB (0.7 dB and 0.8 dB), an operating bandwidth of 12.5% (7.5% and 6.9%), and a bandwidth for 30‐dB out‐of‐band suppression of 0.06f0 (0.09f0 and 0.14f0). The isolation and common‐mode suppression inside the passbands of the three prototypes are all larger than 17 and 38 dB, respectively.

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A High-Performance Dual-Mode Filtering Power Divider With Simple Layout

Cited by 49 publications

References 8 publications

Dual‐band filtering power divider with unequal power division ratio and low‐loss characteristic

Dual‐band filtering power divider with unequal power division ratio and low‐loss characteristic

Design of diplexer‐integrated filtering power divider with high isolation

Filtering balanced-to-single-ended power dividing network

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