On MIMO‐UFMC in the Presence of Phase Noise and Antenna Mutual Coupling

Chen, Xiaoming; Zhang, Shuai; Zhang, Anxue

doi:10.1002/2017rs006258

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…When a massive MIMO array with an inner-element distance around half wavelength is implemented, the mutual coupling is inevitable [6]. Recently, researchers found that the coupling of the arrays, basically consists of space wave coupling component, seriously deteriorate the antenna performance [7][8][9][10][11][12][13][14][15][16][17]. Thus, low coupling of the massive MIMO array has become a crucial indicator during the implement.…”

Section: Introductionmentioning

confidence: 99%

Mutual Decoupling for Massive MIMO Antenna Arrays by Using Triple-Layer Meta-Surface

Luo

Zhang

Pedersen

et al. 2022

IEEE Open J. Antennas Propag.

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The high isolation massive antenna arrays are the key devices in the base station of the future wireless communication systems. The challenge for the array application is how to reduce the coupling among the array elements. This paper introduces a new decoupling method for massive MIMO arrays with an innerelement distance of around half wavelength by using a triple-layer metasurface (TMS). The TMS comprises three identical surfaces. The waves reflected from the bottom metasurface (MS) and top two-layer MS have the same amplitudes and the opposite phases, which are canceled with each other. An example of 4×4 dualpolarized wideband microstrip array with a TMS is proposed to verify the decoupling method. The simulation and measurement show that the TMS can help reduce the coupling among the array elements to less than -24 dB in both the co-polarization and cross-polarization directions within 4.23-4.82 GHz. In the meanwhile, the radiation characteristics of the arrays with and without TMS are almost unchanged.INDEX TERMS Decoupling, dual-polarized, massive multiple-input multiple-output (MIMO) antenna array, triple-layer metasurface (TMS), wideband.

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Section: Introductionmentioning

confidence: 99%

Mutual Decoupling for Massive MIMO Antenna Arrays by Using Triple-Layer Meta-Surface

Luo

Zhang

Pedersen

et al. 2022

IEEE Open J. Antennas Propag.

Self Cite

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“…The challenge of designing a compact antenna is to make the distance between elements closer, which makes it practically impossible to avoid the mutual coupling effects [4], [5]. Such effects, among others, include various in the blindness to some directional of arrival [6], increasing error rate [7], and reducing capacity [8] of the M-MIMO communication system. However, it appears that simultaneously achieving wide bandwidth, compactness and low mutual coupling remains challenging.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Parasitic Patches Addition on Bandwidth Enhancement and Mutual Coupling in 2 × 2 Sub-Arrays

2022

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This paper presents a 2x2 sub-array design with elements having parasitic patches (PPs) for massive MIMO applications. We show that with greater number PPs, bandwidth can be increased considerably with respect to previous designs. The increase in element dimension and, consequentially, element spacings reduces the mutual coupling in the sub-array. The frequency chosen for the design is 3.5 GHz, one of the 5G frequency allocations. For each sub-array element, multiple PPs are placed on the top layer, aimed to enhance the bandwidth. A coaxial feeding probe is employed. Two types of single element antenna with 5 and 10 PPs exhibit a bandwidth of more than 600 MHz and 700 MHz or a fractional bandwidth of about 17% and 20%, respectively. Simulation results and measurements of the 2x2 sub-arrays with 5 PPs and 10 PPs elements show that the antennas meet the desired performance because the return loss is less than dB in a bandwidth of 567 MHz and 730 MHz, respectively. Mutual coupling effects can be suppressed down to less than dB in the frequency range of 3.202 GHz 3.934 GHz.

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“…Hence, the major challenge in the design of MIMO antenna is to limit the mutual coupling within the recent miniaturized printed and other antennas. In case of digital infrastructure MIMO systems, the higher mutual coupling has adverse effect on the channel capacity [21] and error rate [22]. A wide range of MIMO precoding and decoding techniques [23], [24]; such as partial swam optimization [25], [26], genetic algorithms [27], [28] and galaxy based search algorithm [29] are proposed to mitigate mutual coupling in the digital domain.…”

Section: Introductionmentioning

confidence: 99%

Study on Mutual Coupling Reduction Technique for MIMO Antennas

2019

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In recent years, multiple-input-multiple-output (MIMO) antennas with the ability to radiate waves in more than one pattern and polarization play a great role in modern telecommunication systems. This paper provides a theoretical review of different mutual coupling reduction techniques in MIMO antenna systems. The increase in the mutual coupling can affect the antenna characteristics drastically and therefore degrades the performance of the MIMO systems. It is possible to improve the performance partially by calibrating the mutual coupling in the digital domain. However, the simple and effective approach is to use the techniques, such as defected ground structure, parasitic or slot element, complementary split ring resonator, and decoupling networks which can overcome the mutual coupling effects by means of physical implementation. An extensive discussion on the basis of different mutual coupling reduction techniques, their examples, and comparative study is still rare in the literature. Therefore, in this paper, different MIMO antenna design techniques and all of their mutual coupling reduction techniques through various structures and mechanisms are presented with multiple examples and characteristics comparison.

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On MIMO‐UFMC in the Presence of Phase Noise and Antenna Mutual Coupling

Cited by 12 publications

References 22 publications

Mutual Decoupling for Massive MIMO Antenna Arrays by Using Triple-Layer Meta-Surface

Mutual Decoupling for Massive MIMO Antenna Arrays by Using Triple-Layer Meta-Surface

The Effect of Parasitic Patches Addition on Bandwidth Enhancement and Mutual Coupling in 2 × 2 Sub-Arrays

Study on Mutual Coupling Reduction Technique for MIMO Antennas

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