Design Method for Capacity Enhancement of Pattern-Reconfigurable MIMO Vehicular Antennas

Kowalewski, Jerzy; Eisenbeis, Joerg; Tingulstad, Magnus; Kollár, Zsolt; Zwick, Thomas

doi:10.1109/lawp.2019.2943205

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…With the rapid development of automobile intelligence and communication technology, the demand for more efficient and reliable communication solutions in vehicular communication systems is becoming increasingly urgent [1][2][3][4][5]. However, traditional fixedpattern antennas are limited by their fixed radiation characteristics and cannot adapt to the changing communication needs of vehicles in different working environments.…”

Section: Introductionmentioning

confidence: 99%

A Radiation-Pattern Reconfigurable Antenna Array for Vehicular Communications

Gao,

Sun

2024

Sensors

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This paper presents a low-profile reconfigurable antenna array capable of five radiation-pattern modes for vehicular communication applications. The antenna array consists of four antenna elements, each containing four square patches. Exciting one of the square patches generates a broadside radiation. A square parasitic patch is added at the rear of the excited patch, and two square parasitic patches are placed at the front. By optimizing the design of these parasitic patches, including the treatment of center slotting and addition of shorting pins, the antenna element achieves an end-fire beam with a certain tilt angle. On this basis, a reconfigurable feeding network is designed with 1:1 and 1:4 output modes. By connecting the reconfigurable feeding network to the four antenna elements and altering the on/off states of the PIN diodes in the feeding network, a reconfigurable antenna with four end-fire beams and one omnidirectional beam in its radiation pattern is realized. Measurement results demonstrate an excellent impedance bandwidth, radiation pattern, and gain performance in all modes. The four end-fire and one omnidirectional radiation characteristics make it highly suitable for vehicular communication applications.

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Section: Introductionmentioning

confidence: 99%

A Radiation-Pattern Reconfigurable Antenna Array for Vehicular Communications

Gao,

Sun

2024

Sensors

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“…This is a major issue while designing MIMO antennas for 5G and 6G communications [5]. Various decoupling methods are available to reduce mutual coupling and enhance the isolation between the MIMO elements like placing meta metals, stubs, neutralization lines, electromagnetic band gaps, and defected ground structures [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Each pair of radiation elements is 180 • out of phase, so radiation interference was canceled, increasing isolation by more than 21 dB [15]. The proposed MIMO antenna achieved a high channel capacity of 1 bp/s/Hz using sophisticated design approaches such as channel simulations and optimized patterns [16]. In 4 × 4 UWB-MIMO, the mutual coupling between any two antenna elements should be less than −15 dB.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Novel Frock-shaped Miniaturized 4×4 UWB MIMO Antenna Using Characteristic Mode Analysis

Suresh¹,

Reddy²

2023

PIER B

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In this paper, a novel frock-shaped four-port MIMO antenna is designed, and experimental results are verified for UWB applications. The four elements are placed orthogonal to each other to reduce mutual coupling. The proposed novel-shaped antenna is derived from a circular patch antenna. A series of modifications were made on a circular patch antenna to get the desired single, novel-shaped radiator. Inserting decoupling stubs in the plus form between MIMO elements lessened mutual coupling. The entire design procedure for the proposed four-port antenna was carried out by characteristic Mode Analysis. The proposed model is printed on an FR-4 substrate with dimensions of 40 × 40 × 1.6 mm 3 . This novel 4-port antenna is well-operated in the UWB range from 2.8 GHz to 11.4 GHz and has a bandwidth of 8.6 GHz. The novelly shaped radiators with good decoupling stubs produce a high impedance bandwidth of 121.8%, radiation efficiency of 91%, high isolation of 26 dB, and gain of 6 dB in the operating band. The diversity parameters are the enveloped correlation coefficient (ECC) of less than 0.0011, diversity gain (DG) very near 10 dB, the capacity channel loss of 0.28 bp/s/Hz, and the mean effective gain of −3.1 dB. The experimental results of the antenna were verified with simulated ones, and there was good agreement between the fabricated and simulated results.

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“…They can be utilized for rapid communication applications, which involves a high transmission rate, for example, peer-to-peer data transfer and short-range wireless transmissions [3,4]. Recently, the attention of the researchers has been shifted to multiple-input-multiple-output (MIMO) antennas as they help in reducing multipath fading and achieving higher range, more reliability, and high data rate, without increasing transmitted power or bandwidth [5]. Several individual elements are combined together, with enough inter-element isolation, to obtain a high-performance MIMO/diversity antenna [6].…”

Section: Introductionmentioning

confidence: 99%

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

Kumar

Urooj

Malibari

2020

Sensors

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This article presents a compact, planar, quad-port ultra-wideband (UWB) multiple-input–multiple-output (MIMO) antenna with wide axial ratio bandwidth (ARBW). The proposed MIMO design consists of four identical square-shaped antenna elements, where each element is made up of a circular slotted ground plane and feed by a 50 Ω microstrip line. The circular polarization is achieved using a protruding hexagonal stub from the ground plane. The four elements of the MIMO antenna are placed orthogonally to each other to obtain high inter-element isolation. FR-4 dielectric substrate of size 45 × 45 × 1.6 mm3 is used for the antenna prototype, and a good agreement is noticed among the simulated and experimental results. The proposed MIMO antenna shows 3-dB ARBW of 52% (3.8–6.5 GHz) and impedance bandwidth (S11 ≤ −10 dB) of 144% (2.2–13.5 GHz).

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Design Method for Capacity Enhancement of Pattern-Reconfigurable MIMO Vehicular Antennas

Cited by 6 publications

References 15 publications

A Radiation-Pattern Reconfigurable Antenna Array for Vehicular Communications

A Radiation-Pattern Reconfigurable Antenna Array for Vehicular Communications

Experimental Investigation of Novel Frock-shaped Miniaturized 4×4 UWB MIMO Antenna Using Characteristic Mode Analysis

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

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