Dual-Band Microstrip Filtering Power Divider Based on One Single Multimode Resonator

Zhang, Gang; Wang, Xuedao; Yang, Jiquan

doi:10.1109/lmwc.2018.2866191

Cited by 38 publications

(30 citation statements)

References 11 publications

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“…With the development of multi-band and multi-standard modern wireless communication systems, the multi-band microwave components are in great demand. Some efforts [6][7][8][9][10][11][12][13] have been made to design dual-band filtering power dividers (DB-FPDs). In [6], a DB-FPD is designed by replacing the conventional quarterwavelength TLs with BPFs, and the isolation elements are loaded at the open ends of filter to realise good isolation between the output ports.…”

Section: Introductionmentioning

confidence: 99%

Compact dual‐band filtering power divider with independently controllable bandwidths using shorted patch resonators

Dong

Wang

et al. 2020

IET Microwaves, Antennas & Propagation

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This study presents a novel dual‐band filtering power divider (DB‐FPD) structure with independently controllable bandwidths for dual‐band application. The proposed DB‐FPD structure is constructed by shorted G‐ and T‐shaped patch resonators, and meandered slot lines are etched on shorted patch resonators to generate resonance in the upper band. The 3 dB fractional bandwidth (FBW) of designed DB‐FPD structure in a lower band (upper band) can be adjusted from 5.2 to 24.2% (3.1 to 26.9%), respectively, using a substrate of 31 mil thick TLY‐5. The even‐/odd‐mode method is adopted to demonstrate the power splitting and isolation performances. The lumped‐element equivalent circuit is extracted to explain the power splitting transmission performance. Also, the coupling matrix analysis is applied to present the detailed design procedures for practical DB‐FPD, with specific passband bandwidths and centre frequencies of dual passbands. Finally, the isolation performances are analysed with different isolation resistor values and loading positions. For verification, two DB‐FPDs with equal absolute bandwidths (ABW) and equal FBWs are simulated, fabricated and measured for dual‐band WLAN application. The measured results agree well with the simulated ones, exhibiting a favourable frequency selectivity and controllable passband bandwidths.

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Section: Introductionmentioning

confidence: 99%

Compact dual‐band filtering power divider with independently controllable bandwidths using shorted patch resonators

Dong

Wang

et al. 2020

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

show abstract

“…The FPD achieves 2‐order bandpass response with only 2 resonators. In Reference , an FPD with dual‐band 2‐order bandpass response was designed by using only one 4‐mode resonator. An ideal result in the size reduction was achieved in References and .…”

Section: Introductionmentioning

confidence: 99%

“…In Reference , an FPD with dual‐band 2‐order bandpass response was designed by using only one 4‐mode resonator. An ideal result in the size reduction was achieved in References and . However, the isolation between 2 output ports turns into the new difficulties in the design due to the fact that they both have an unsymmetrical structure and the traditional odd‐ and even‐mode analysis method could not be applied consequently.…”

Section: Introductionmentioning

confidence: 99%

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Filtering power divider with good output balance and unsymmetrical structure

Luo

Tang

et al. 2020

Micro & Optical Tech Letters

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This article presents a filtering power divider (FPD) that realizes 2‐order bandpass response by only using 2 shorted‐stub loaded resonators (SSLRs). The structure of the proposed FPD is unsymmetrical but it achieves a good output balance. The isolation between output ports is also realized. The detailed theoretical analysis suitable for the FPD with unsymmetrical structure is developed and a discussion for the output balance is also presented. An FPD that works at 2.39 GHz is fabricated and measured for demonstration. A good agreement is obtained between simulation and measurement.

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“…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 , 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. These dual‐band FPDs show good filtering responses, which is owing to several transmission zeros realized by the employed resonators or band‐pass filters.…”

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

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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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Dual-Band Microstrip Filtering Power Divider Based on One Single Multimode Resonator

Cited by 38 publications

References 11 publications

Compact dual‐band filtering power divider with independently controllable bandwidths using shorted patch resonators

Compact dual‐band filtering power divider with independently controllable bandwidths using shorted patch resonators

Filtering power divider with good output balance and unsymmetrical structure

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

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