Weak-Field-Based Self-Decoupling Patch Antennas

Lin, Huawei; Chen, Quangang; Ji, Yanliang; Yang, Xujun; Wang, Jianpeng; Ge, Lei

doi:10.1109/tap.2020.2970109

Cited by 110 publications

(58 citation statements)

References 24 publications

(22 reference statements)

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“…The isolation between non-adjacent ports is normally high enough in patch antenna arrays, there is also no additional decoupling operation for these ports. This is a common consideration during the decoupling of large-scale arrays [7]- [9], [21]- [23]. Therefore, the basic decoupling principle is that the isolation between non-adjacent elements should not be degraded.…”

Section: Analysis Of the Proposed Decoupling Methodsmentioning

confidence: 99%

“…Here, some recently published decoupling methods for large-scale antenna arrays are summarized for comparison purposes, as listed in Table III. The schemes presented in [7], [19], [21], and [22] are employed for 1-dimension array configurations. This means that they are useful for linear antenna arrays, but may not effective for M×N (2-Dimension) arrays.…”

Section: Summarized Comparisonsmentioning

confidence: 99%

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A Simple Decoupling Network With Filtering Response for Patch Antenna Arrays

Zhang

Pedersen

et al. 2021

IEEE Trans. Antennas Propagat.

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Facing the demand for decoupling and filtering for large-scale antenna arrays in modern communication systems, a transmission-line-based scheme is proposed and studied in this article. Different from other decoupling networks published recently featuring narrow decoupling bandwidths and high spurious levels, the proposed approach uses simple T-shaped networks where decoupling and filtering responses are realized simultaneously, leading to high frequency selectivity and improved decoupling bandwidth. The proposed design is a simple one-dimension configuration but powerful for two-dimension arrays. Based on the study case of a 4×4 dual-polarized patch array, theoretical analysis and full-wave simulation are carried out to verify the performance in the decoupling and frequency selectivity of this method. A prototype is further fabricated, assembled, and measured to demonstrate the performance of the proposed method in practice. The measured and simulated results are consistent with each other where a low insertion loss of around 0.6 dB is observed. The results denote that the proposed method is easily realized with a very small effect on the radiation performance of antenna elements, making it to be a potential and valuable decoupling and filtering solution for large-scale arrays.

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Section: Analysis Of the Proposed Decoupling Methodsmentioning

confidence: 99%

Section: Summarized Comparisonsmentioning

confidence: 99%

A Simple Decoupling Network With Filtering Response for Patch Antenna Arrays

Zhang

Pedersen

et al. 2021

IEEE Trans. Antennas Propagat.

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“…A parasitic structure or a shared radiation patch has also been proposed as decoupling designs to achieve good isolation by offering an extra coupling path, if space permits [12][13][14][15]. In addition to these decoupled structure designs, the concept of field distributions has been used to optimize the relative position of the antennas to obtain low mutual coupling, including current distributions [16], weak field distributions [17], and null-amplitude field points [18]. In addition, metamaterial, metasurface, and substrate integrated waveguide (SIW) structures have also been used to suppress the coupling between neighboring antenna elements, which can be applicable for a wide range of frequency bands with ease of manufacture process, low cost, and high isolation level between the array elements [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications

Qiu

et al. 2022

International Journal of Antennas and Propagation

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Decreasing the mutual coupling between multiple-input-multiple-output (MIMO) antenna elements requires the selection of an appropriate decoupling technique without changing the geometry or operating frequency of the antenna. In this paper, a simple and flexible approach that involves loading a small ferrite film on the radiation patch of an MIMO antenna pair has been proposed to mitigate the unwanted mutual coupling. Through a thorough investigation, the two IFA elements with an element distance of only 1.4 mm can be decoupled adequately by properly controlling the ferrite-film loading area and the thickness of the ferrite film, along with maintaining the desired operating frequencies and acceptable radiation characteristics at the LTE Band 42 (3.4–3.6 GHz). The optimum ferrite-film loading on the grounding branch of the IFA element can increase the isolation from −6.64 dB to −10.43 dB and enhance the bandwidth from 3.20–3.88 GHz to 2.83–3.65 GHz, and its efficiency can reach to 45.5%, as well as a 2 dB gain. A physical model has also been established to interpret the operating mechanism of ferrite-film loading on the IFAs. The proposed simulated procedure is validated via measurements. This technique of ferrite loading on MIMO antennas can effectively decouple the mutual coupling at a low cost and with low design complexity, indicating its potential applicability for use in MIMO antennas in mobile handsets.

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“…It is noted that the number of available isolation enhancement techniques based on pattern diversity and SIW technology is limited [17]. The 'weak field area technique'for isolation improvements was introduced in [18], but it is applicable only to adjacent elements. In addition, [19] investigates a compact self-isolated MIMO system that uses a quarter-mode SIW cavity to achieve isolation of 18.5 dB without using any decoupling network, resulting in a narrow bandwidth of 60 MHz and gain (4.2 dB) at 3.5 GHz.…”

Section: Introductionmentioning

confidence: 99%

A MIMO Antenna System Using Self-Decoupled EMSIW Dual-Beam Antenna Elements

Kumari

Das

2022

IEEE Access

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This paper presents a two-element MIMO antenna system using two dual-beam EMSIW antenna elements. The dual-beam pattern is achieved by creating two weak field areas using EMSIW. The antenna elements are placed in the weak field areas of each other, which results in -31.65 dB measured isolation between the two adjacent antenna elements. Different scenarios for the placement of the elements are predicted, one case is illustrated in this paper. The high isolation, omission of decoupling networks, and use of dual-beam antenna element makes the antenna simple, compact, and suitable for MIMO applications.INDEX TERMS Self-decoupling technique, eighth mode substrate integrated waveguide (EMSIW), dual beam antenna, mutual coupling.

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Weak-Field-Based Self-Decoupling Patch Antennas

Cited by 110 publications

References 24 publications

A Simple Decoupling Network With Filtering Response for Patch Antenna Arrays

A Simple Decoupling Network With Filtering Response for Patch Antenna Arrays

Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications

A MIMO Antenna System Using Self-Decoupled EMSIW Dual-Beam Antenna Elements

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