Cross-Polarization Discrimination and Port-to-Port Isolation Enhancement of Dual-Polarized Antenna Structures Enabling Polarization MIMO

This article introduces a power-efficient and lowcost CMOS 28-GHz phased-array beamformer supporting fifthgeneration (5G) dual-polarized multiple-in-multiple-out (MIMO) (DP-MIMO) operation. To improve the cross-polarization (crosspol.) isolation degraded by the antennas and propagation, a power-efficient analog-assisted cross-pol. leakage cancellation technique is implemented. After the high-accuracy cancellation, more than 41.3-dB cross-pol. isolation is maintained along with the transmitter array to the receiver array. The element-beamformer in this work adopts the compact neutralized bi-directional architecture featuring a minimized manufacturing cost. The proposed beamformer achieves 22% per path TX-mode efficiency and a 4.9-dB RX-mode noise figure. The required onchip area for the beamformer is only 0.48 mm 2 . In over-the-air measurement, a 64-element dual-polarized phased-array module achieves 52.2-dBm saturated effective isotropic radiated power (EIRP). The 5G standard-compliant OFDMA-mode modulated signals of up to 256-QAM could be supported by the 64-element modules. With the help of the cross-pol. leakage cancellation technique, the proposed array module realizes improved DP-MIMO EVMs even under severe polarization coupling and rotation conditions. The measured DP-MIMO EVMs are 3.4% in both 64-QAM and 256-QAM. The consumed power per

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“…Thus, the measured EVMs are almost the same between Fig. 21 Fig. 22(a) demonstrates the measured performance of the RX-mode beamformer.…”

Section: Measurementsupporting

confidence: 59%

“…However, the performance of such a DP-MIMO transceiver is sensitive to the cross-pol. coupling from the antennas and the polarization rotation during propagation [20], [21]. Therefore, the achievable DP-MIMO EVMs and power efficiencies are limited.…”

Section: Introductionmentioning

confidence: 99%

A CMOS Dual-Polarized Phased-Array Beamformer Utilizing Cross-Polarization Leakage Cancellation for 5G MIMO Systems

Pang

Luo

et al. 2021

IEEE J. Solid-State Circuits

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“…First, high-gain antennas allow a longer wireless transmission distance between the sink node and sensor nodes [ 5 , 6 , 7 ]. Second, dual-polarized antennas have the capabilities of avoiding the polarization mismatch and reducing the system volume compared with a pair of spatially-separated single-polarized antennas [ 8 , 9 , 10 ]. Third, omnidirectional antennas provide a 360° full-space radiation pattern in the azimuthal plane, leading to a broad sensor coverage and flexible system alignment [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…By carving the horizontal-polarized slots on the cavity with vertical polarization, [ 22 , 23 , 24 ] present ODP antennas with high isolation. Besides, the designs in [ 10 ] and [ 25 ] realize a high-gain radiation pattern by using an array of several separated antenna elements at a certain distance. These high-gain antennas combine the antenna elements of a high profile [ 21 ], irregular structure [ 22 , 23 , 24 , 25 ] or within a certain distance, which will result in high grid lobes, complicated feeding structures, or large system sizes for array design.…”

Section: Introductionmentioning

confidence: 99%

High-Gain Omnidirectional Dual-Polarized Antenna for Sink Nodes in Wireless Sensor Networks

Zhang

2022

Sensors

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In wireless sensor networks (WSN), a sink node receives signals from a large number of sensor nodes. Hence, the sink nodes are required to integrate compact antennas with high performances, such as high gain, dual polarizations, and omnidirectional radiation. In this paper, a high-gain omnidirectional dual-polarized (HGODP) antenna with a slot-cavity structure is proposed for WSN. The proposed antenna integrates dual omnidirectional antennas with orthogonal polarizations, i.e., a thin open-ended cavity for horizontal polarization and four folded slots for vertical polarization. Due to the orthogonal operating modes of the dual polarizations, the antenna configuration is constructed within a compact volume, but with an independent design. A prototype of the proposed antenna is fabricated and measured within a ruler-like profile. The experimental results show that the realized gains are higher than 6.5 dBi and are achieved for both dual polarizations in 2.37~2.54 GHz. With the merits of high gain, high isolation, and omnidirectional radiation, the proposed compact antenna exhibits promising usage for sink nodes in WSN.

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“…Owing to increased sensor connectivity among multiple devices, an unavoidable level of microwave interference exists and thus potentially causes a significant degradation in the sensors’ performance [ 45 , 46 , 47 , 48 ]. To avoid performance degradation, the use of antennas with polarization diversity is considered to be one of the promising techniques to facilitate multiple microwave sensor operation with a reliable interference rejection [ 49 , 50 , 51 , 52 , 53 ]. There are typically four types of antenna polarizations, such as horizontal polarization (HP), vertical polarization (VP), right-hand circular polarization (RHCP), and left-hand polarization (LHCP).…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized Multi-Channel 24 GHz Radar Sensor Antenna for High Channel-to-Channel Isolation

Kim

Noh

Lee

et al. 2020

Sensors

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This article presents a dual-polarized, high gain multi-beam and high T/Rx channel-to-channel isolation antenna module for 24 GHz sensor applications. The proposed antenna is configured to support 2-Tx and 2-Rx channels with a pair of vertically polarized (VP) radiation pattern and a pair of horizontally polarized (HP) radiation pattern. Further, each linearly polarized T/Rx antenna is configured by 2 × 4 array with a multi-layer integrated feed network, resulting in four sets of 2 × 4 array antennas fabricated within a single printed circuit board (PCB). Since multiple RF channels must be ensured with minimal interference, high antenna-to-antenna, including Tx-to-Tx, Rx-to-Rx, and Tx-to-Rx port isolations in the proposed antenna are achieved by multi-layered feed network and four sets of T-shaped magnetic walls. To verify the performance of the proposed structure, a 2-Tx and 2-Rx antenna module was fabricated at 24 GHz. The fabricated antenna showed a measured maximum 10-dB impedance bandwidth of 3.9% with a maximum measured gain of 11.7 dBi, considering both Tx and Rx. Further, the measured channel-to-channel isolations were always better than 35.6 dB at 24 GHz.

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Cross-Polarization Discrimination and Port-to-Port Isolation Enhancement of Dual-Polarized Antenna Structures Enabling Polarization MIMO

Cited by 18 publications

References 3 publications

A CMOS Dual-Polarized Phased-Array Beamformer Utilizing Cross-Polarization Leakage Cancellation for 5G MIMO Systems

A CMOS Dual-Polarized Phased-Array Beamformer Utilizing Cross-Polarization Leakage Cancellation for 5G MIMO Systems

High-Gain Omnidirectional Dual-Polarized Antenna for Sink Nodes in Wireless Sensor Networks

Dual-Polarized Multi-Channel 24 GHz Radar Sensor Antenna for High Channel-to-Channel Isolation

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