Decoupling and Matching Network for Dual-Band MIMO Antennas

Li, Min; Zhang, Yujie; Wu, Di; Yeung, Kwan L.; Jiang, Lijun; Murch, R.D.

doi:10.1109/tap.2021.3118791

Cited by 31 publications

(23 citation statements)

References 54 publications

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“…Table 1 presents a comparison of decoupling circuit approach types, antenna's dimension operating frequency band, radiating frequency ( f 0 ), peak‐to‐peak isolation improvement, and isolation achieved throughout the operating band. The works in References 11,12,14,17–20 require a large structure as compared to the proposed work. Besides, the work in Reference 15 is compact but operates for single‐band operation only.…”

Section: Resultsmentioning

confidence: 99%

“…A flower‐shaped metamaterial absorber is introduced to improve isolation in the MIMO antenna 9 . Many investigative procedures are offered in the works to enhance the isolation among MIMO elements, for instance, T‐stub circuit, coupled‐resonator decoupling network (CRDN), lumped network, and so on 10–20 . The CRDN is established based on the Y‐parameter of the antenna structure.…”

Section: Introductionmentioning

confidence: 99%

“…In Reference 12, a three T‐stub‐based system with dual‐band functionality offers the desired isolation. The connected and disconnected metallic microstrip stubs are used to design decoupling and matching circuits using a binary optimization algorithm 18 . In Reference19, parallel‐line‐based decoupling and matching network (DMN) is design MIMO antenna.…”

Section: Introductionmentioning

confidence: 99%

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Dual‐band MIMO antenna decoupling using vias based multipath decoupling circuit

Singh

Prasad

Tripathi

2022

Micro & Optical Tech Letters

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This article offers a new decoupling circuit for isolation enhancement to decouple the dual‐band multiple‐input‐multiple‐output (MIMO) antenna in a compact dimension. In the design, a novel dual‐band vias‐based stub‐loaded multipath decoupling circuit is used which offers multipath decoupling using admittance parameters of the structure to enhance isolation. The vias position transforms the stub's behavior into a mix of inductive and capacitive behavior, and its diameter variation aids in isolation and frequency fine‐tuning. The proposed multipath decoupling circuit helps to achieve good isolation between the antenna element using a hybrid coupling. The projected MIMO antenna radiates at 2.29–2.51 GHz (Wi‐Fi) and 5.74–5.89 GHz (WLAN) bands simultaneously to validate the proposed decoupling circuit's effectiveness and demonstrate the design procedure. The decoupling circuit helps obtain the isolation more significant than 20 dB in each band than the initial 11 dB in the Wi‐Fi band and 14 dB in the WLAN band. Moreover, the proposed decoupling scheme can be helpful for the redesign of other multi‐band MIMO antennas applications. The excellent diversity performance, which makes this a suitable contender for advanced technological systems.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dual‐band MIMO antenna decoupling using vias based multipath decoupling circuit

Singh

Prasad

Tripathi

2022

Micro & Optical Tech Letters

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“…After that, the binary GA with 128 binary variables is utilized to determine the optimal Y L . A binary vector X = { x 1 , x 2 … x 128 }, x i ϵ {0,1}, is adopted to represent the variables in GA. Set Equation () as the fitness function of GA. Then, the optimization problem is illustrated as follows 1 :

\min_{X} \sum_{f = f_{L}}^{f = f_{U}} {(|Γ (X, f)| - b)}^{o} s . t . x_{i} \in ((), 0, 1),

where b is the threshold value (e.g. −10, −15 dB, etc.).…”

Section: Proposed Methodsmentioning

confidence: 99%

“…In modern communication systems, especially in radio frequency (RF) and microwave circuit, matching network is widely used to ensure more power transmission of RF signals 1 . Matching network plays an important role in amplifiers, mixers, oscillators, antennas, and power dividers/combiners, and so forth 2 .…”

Section: Introductionmentioning

confidence: 99%

A novel and efficient impedance matching technique based on fragment discrete structure and genetic algorithm

Cheng

Wei³

et al. 2022

Int J RF Mic Comp-Aid Eng

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This paper proposes a novel and efficient design technique to achieve multifrequency impedance matching. The matching network is mainly constructed based on fragment discrete structure, which consists of regularly distributed metallic microstrip stubs, where some of them are connected whereas others are not. Different designs are generated by determining the interconnections between each two stubs. To facilitate the design procedure, a theory based on port impedance substitution is rigorously developed to calculate the resulted performance (reflection coefficient) of each design. Finally, the optimal design is obtained by using the derived formulas and genetic algorithm. The full optimization procedure is totally free of electromagnetic (EM) simulation and is quite timesaving. Three different examples of mismatched frequency-varying complex load are adopted to illustrate the steps and functionality of the proposed method. The accuracy of the proposed fast-calculation method is also verified by EM simulation and experimental results.

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