Dual-Polarization Slot Antenna With High Cross-Polarization Discrimination for Indoor Small-Cell MIMO Systems

Oh, TaeckKeun; Lim, Yeon-Geun; Chae, Chan-Byoung; Lee, Yong-Shik

doi:10.1109/lawp.2014.2364517

Cited by 62 publications

(31 citation statements)

References 7 publications

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“…It has been shown in the literature that the SI can be mitigated by consecutive passive suppression and active cancellation [7]. Passive suppression aims to isolate the transmitter and receiver in the propagation domain so that SI is attenuated [8]- [10]. Active cancellation intends to cancel the SI at both radio frequency (RF) domain [11]- [13] and digital domain [14], [15].…”

Section: C Tran Is With Faculty Of Engineering and Information Scmentioning

confidence: 99%

Beam-Based Analog Self-Interference Cancellation in Full-Duplex MIMO Systems

Tran

Huang

et al. 2020

IEEE Trans. Wireless Commun.

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Self-interference (SI) cancellation for full-duplex (FD) multiple input multiple output (MIMO) systems is challenging due to both hardware and signal processing complexity. In this paper, a beam-based adaptive filter structure with analog least mean square (ALMS) loops is proposed to significantly reduce the complexity of SI cancellation for FD MIMO systems. With this structure, the number of adaptive filters required for SI cancellation scales linearly with the number of transmit beams rather than quadratically with the number of antennas. Furthermore, to avoid additional transmit chains used to upconvert the beam signals to generate reference signals for the ALMS loops, a novel method is proposed to select the optimized reference signals from all transmitted signals. In addition, our stationary analysis shows that the proposed structure for FD MIMO systems outperforms the ALMS loop employed for an FD single input single output system. Simulations are conducted to confirm the theoretical analyses.

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Section: C Tran Is With Faculty Of Engineering and Information Scmentioning

confidence: 99%

Beam-Based Analog Self-Interference Cancellation in Full-Duplex MIMO Systems

Tran

Huang

et al. 2020

IEEE Trans. Wireless Commun.

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“…In order to obtain higher channel capacity for the MIMO system, the polarization diversity method is applied in this work, so that all 8-antennas can be allowed into the limited space of a smartphone, and good isolations between antenna elements are also achieved. Notably, conventional design methods to achieve dual polarization are not suitable for smartphones [19][20][21][22].…”

Section: Design Processmentioning

confidence: 99%

Eight-Port Orthogonally Dual-Polarized Antenna Array for 5G Smartphone Applications

Ban

et al. 2016

IEEE Trans. Antennas Propagat.

317

210

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A dual-polarized hybrid 8-antenna array operating in the 2.6-GHz band (2550-2650 MHz) for 5G communication multi-input multi-output (MIMO) operation in the smartphone is presented. The proposed hybrid antenna array elements are symmetrically placed along the long edges of the smartphone, and they are composed of two different 4-antenna array types (C-shaped coupled-fed and L-shaped monopole slot) that exhibit orthogonal polarization. Therefore, coupling between the two antenna array types can be reduced, and the MIMO system performances are enhanced. A prototype of the proposed 8-antenna array is manufactured and measured. Good impedance matching (10 dB return loss or better), desirable cross polarization discrimination (XPD better than 15 dB) and acceptable isolation (better than 12.5 dB) are obtained. Envelope correlation coefficient (ECC) and channel capacity are also calculated to evaluate the MIMO performances of the proposed antenna array.

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“…It can be clearly observed that a third resonant frequency f3 appears on the higher end of the two original ones in Antenna C, which does not have the T-shape component, and only f 3 is dominated by the location of the T-shape component in such a way that f 3 gets lower when l T d gets larger, which means a longer extra path for the current flowing would shift the resonant frequency f 3 lower. To achieve the maximum operating bandwidth with the optimized performance for the 3.5 GHz band, l T d = 7.13 mm is chosen, with the simulated impedance bandwidth as 27.8% from 3.13 GHz to 4.14 GHz (VSWR < 1.5), which is significant improvement over those reported slot antenna [17] and Bowtie antenna [18] used in MIMO array. …”

Section: Antenna Elementmentioning

confidence: 99%

A Scalable Compact Wideband Dual-Polarized Printed Dipole Antenna for Base Station Applications

Tang¹,

Cao²,

Ho³

2017

PIER C

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Abstract-A novel compact wideband dual-polarized printed dipole antenna for base station application is presented. The proposed antenna is composed of four assembled substrates. Two pairs of identical arrow-shaped conductive lines on the tophat substrate form two orthogonal polarized dipoles. Two baluns connected with 50 Ω coaxial cables are integrated on another two vertical substrates to excite the dipoles. The other horizontal board at bottom provides grounding. A rectangular boxshaped reflector is also used to enhance its stability in radiation patterns over the operating frequencies. It achieves 22% size reduction from the conventional printed half-wavelength cross-dipole, and 43.2% impedance bandwidth (VSWR < 2), while maintaining a stable radiation pattern with measured CrossPolarization Degradation (XPD) better than −22 dB at boresight and an average peak gain of 8.4 dBi for a 65 • Azimuth Beamwidth base station application at 700/800/900 MHz bands. With the scalable miniature structure, it may also find itself suitable for side-by-side multiband Multi-Input Multi-Output (MIMO) or Large-Scale Antenna (LSA) 5G base station applications. A 4 × 4 array prototype of the LSA is also designed and fabricated, and it achieves 27.8% impedance bandwidth (VSWR < 1.5) with well decorrelated element performance and array XPD better than −20 dB across as large as 30 • tilting range.

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Dual-Polarization Slot Antenna With High Cross-Polarization Discrimination for Indoor Small-Cell MIMO Systems

Cited by 62 publications

References 7 publications

Beam-Based Analog Self-Interference Cancellation in Full-Duplex MIMO Systems

Beam-Based Analog Self-Interference Cancellation in Full-Duplex MIMO Systems

Eight-Port Orthogonally Dual-Polarized Antenna Array for 5G Smartphone Applications

A Scalable Compact Wideband Dual-Polarized Printed Dipole Antenna for Base Station Applications

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