A simple and modular MIMO antenna system for closely spaced patch antennas

Abbasi, Muhammad Nawaz; Aziz, Abdul; Malik, Waqar; Chishti, Abdul Rehman; Hussain, Rifaqat

doi:10.1002/mop.33257

Cited by 4 publications

(5 citation statements)

References 23 publications

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“…In [24], a decoupling structure originating from the phase shift concept was proposed to enhance the isolation from 7 to 18 dB under the edge-to-edge separation of only 0.027 λ0. In [25], a modular decoupling technique was proposed to enlarge the isolation to 40 dB with the edge-to-edge distance of 0.018 λ0 at 6 GHz.…”

Section: Volume XX Xxxxmentioning

confidence: 99%

“…This work, for the first time, proposes a wideband decoupling scheme to suppress the strong coupling between closely-spaced wideband microstrip patch antennas without sacrificing the low-profile and fabrication cost. Although researchers have proposed many decoupling techniques for patch antennas, all of them either operate in a narrow band or fail to meet the need for low-profile applications [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. It's the research aim and core contribution of this work.…”

Section: Volume XX Xxxxmentioning

confidence: 99%

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Bandwidth Enhancement of H-Plane MIMO Patch Antennas in Integrated Sensing and Communication Applications

Ma,

Shao,

Lai

et al. 2024

IEEE Open J. Antennas Propag.

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In this paper, a low-cost compact decoupled bandwidth enhancement technique is proposed to address the high mutual coupling issue between wideband closely-spaced multiple-input and multiple-out (MIMO) patch antennas. The wideband decoupling property is realized by combining two decoupling circuits introduced by defected ground structure (DGS) and coplanar decoupling structure, respectively. An equivalent circuit is given to clarify the decoupling mechanism and provide physical insight. To validate the feasibility of the proposed design scheme, two prototypes of decoupled wideband patch arrays based on coplanar-fed and probe-fed schemes are simulated, fabricated, and measured in the 5.8 GHz ISM band, respectively. Experimental results show that for both of the two kinds of prototypes, the poor isolation can be improved from 10 dB to better than 20 dB within a wide-matched bandwidth of 10% under an extremely close edge-to-edge distance of 0.038 λ0. In addition, systematic validation for radar sensing performance has been discussed by integrating the proposed antenna with the custom-designed radio frequency system. Moreover, the performance metrics of MIMO parameters and verification of extending to 1×4 antenna arrays are also discussed for both two basic feeding schemes. Compared with the two-element patch arrays, multi-element patch arrays maintain decent performance for isolation enhancement and wideband isolation bandwidth larger than 10%, indicating the proposed decoupling technique is promising for large-scale wideband MIMO systems in integrated sensing and communication applications (ISAC).INDEX TERMS Patch antennas; wideband antennas; antenna decoupling; decoupled bandwidth enhancement; multiple-input and multiple-out (MIMO); radar sensing; integrated sensing and communication applications (ISAC)

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Section: Volume XX Xxxxmentioning

confidence: 99%

Section: Volume XX Xxxxmentioning

confidence: 99%

Bandwidth Enhancement of H-Plane MIMO Patch Antennas in Integrated Sensing and Communication Applications

Ma,

Shao,

Lai

et al. 2024

IEEE Open J. Antennas Propag.

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“…13 Given that array antennas offer higher gains for WPT purposes, it is important to consider the coupling and isolation characteristics of these structures. 14 In Park and Kim, 15 a low-power WPT system is investigated, which yields a 6.42 dB gain and medium-low efficiency, despite using a large array size. Fairuz et al…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, a microstrip antenna operating in the 2.45 GHz frequency range with a 4 dBi gain in the microwave range is introduced 13 . Given that array antennas offer higher gains for WPT purposes, it is important to consider the coupling and isolation characteristics of these structures 14 . In Park and Kim, 15 a low‐power WPT system is investigated, which yields a 6.42 dB gain and medium‐low efficiency, despite using a large array size.…”

Section: Introductionmentioning

confidence: 99%

A triangular patch array for wireless power transfer

Sahandabadi,

Attaran,

Alirezaee

2024

Micro & Optical Tech Letters

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In this paper, the radiative near‐field method has been employed to transfer power through a triangular patch microstrip array that had not been used for this application previously. Additionally, the FR4 substrate is utilized to further reduce the system cost. The system comprises two identical array antennas functioning as both transmitter and receiver. Each array consists of four triangular patches with a side length of 38.5 mm and operates at a frequency of 2.4 GHz. The distance between the two arrays is 50 mm, placing the system in the radiative near‐field category of wireless power transfer. This two‐array system enables the evaluation of power transfer efficiency. The system's performance is improved compared to that of a single triangular patch, and it is also studied in terms of changes in distance. As expected, reducing the distance enhances the system's performance. Subsequently, the structure is fabricated, and the measurements validate the simulation results. The simulation and measurement results exhibit good agreement.

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“…To fulfill the increasing requirements of high channel capacity and reliability without increasing bandwidth and power, the multiple‐input multiple‐output (MIMO) technology has been developed and extensively applied to 4G and 5G communication systems. In the past, various MIMO patch antennas have been presented 1–7 . In Cheng and Cheng, 1 a four‐port MIMO patch antenna has been presented with isolation larger than 23 dB by using additional radiation modes.…”

Section: Introductionmentioning

confidence: 99%

Compact substrate‐integrated waveguide filtering multiple‐input multiple‐output magnetic dipole antenna with high selectivity and high isolation

Xiao

2023

Micro & Optical Tech Letters

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A compact substrate‐integrated waveguide (SIW) filtering multiple‐input multiple‐output magnetic dipole antenna with high selectivity and high isolation is proposed. Each filtering antenna element contains a SIW cavity, a half‐mode SIW cavity, and a magnetic dipole antenna with backed ground. Meanwhile, the SIW cavity and the half‐mode SIW cavity are vertically connected through magnetic coupling, and second‐order filtering frequency responses can be obtained. Owing to the cross‐coupling between the feeding line and antenna, two radiation nulls can be created to realize high selectivity. Based on the radiation mechanism of the magnetic dipole antenna and polarization diversity, high isolation can be obtained. The measured isolation and the envelope correlation coefficient are greater than 24 dB and less than 0.004, respectively.

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A simple and modular MIMO antenna system for closely spaced patch antennas

Cited by 4 publications

References 23 publications

Bandwidth Enhancement of H-Plane MIMO Patch Antennas in Integrated Sensing and Communication Applications

Bandwidth Enhancement of H-Plane MIMO Patch Antennas in Integrated Sensing and Communication Applications

A triangular patch array for wireless power transfer

Compact substrate‐integrated waveguide filtering multiple‐input multiple‐output magnetic dipole antenna with high selectivity and high isolation

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