Identifying the Appropriate Position on the Ground Plane for MIMO Antennas Using Characteristic Mode Analysis

Won, Jusun; Jeon, Sanghyun; Nam, Sangwook

doi:10.5515/jkiees.2016.16.2.119

Cited by 12 publications

(11 citation statements)

References 9 publications

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“…Otherwise, ACC from the proposed method agrees well with the references, that is, ACC values obtained from the radiation patterns. q 13 and q 14 show a better match between the three methods as the dipole's centers (that is, phase center) have larger separations leading to lower ACC [11], [12].…”

Section: Validity Verification Using Simulation Resultsmentioning

confidence: 99%

Estimation of Antenna Correlation Coefficient of N -Port Lossy MIMO Array

Saputro¹,

Nandiwardhana²,

Chung³

2018

ETRI Journal

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This paper proposes a simple yet accurate method for estimating the antenna correlation coefficient (ACC) of a high‐order multiple‐input multiple‐output (MIMO) antenna. The conventional method employed to obtain the ACC from three‐dimensional radiation patterns is costly and difficult to measure. An alternate method is to use the S‐parameters, which can be easily measured using a network analyzer. However, this method assumes that the antennas are highly efficient, and it is therefore not suitable for lossy MIMO antenna arrays. To overcome this limitation, we define and utilize the non‐coupled radiation efficiency in the S‐parameter‐based ACC formula. The accuracy of the proposed method is verified by the simulation results of a 4‐port highly coupled lossy MIMO array. Further, the proposed method can be applied to N‐port arrays by expanding the calculation matrix.

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Section: Validity Verification Using Simulation Resultsmentioning

confidence: 99%

Estimation of Antenna Correlation Coefficient of N -Port Lossy MIMO Array

Saputro¹,

Nandiwardhana²,

Chung³

2018

ETRI Journal

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“…The TCM is based on the method of moment formulation of electric field integral equation and is found to be useful in proving various antenna parameters in the literature. In recent years, different types of antennas well designed by using characteristic mode theory (CMT) for different applications are Slot antennas [7][8][9][10], MIMO antennas [11][12][13][14], UWB antennas [15][16][17], Platform antennas [18][19][20][21], Metasurface antennas [22][23][24][25][26], and Wideband antennas [27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Characteristic Mode Analysis of Wideband Microstrip Antenna

Perli¹,

Rao²

2019

PIER C

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In this paper, a wideband antenna is designed systematically based on characteristic mode analysis (CMA). The antenna consists of a rectangle, a semi-annular ring, and a microstrip line. The radiating behavior and resonant frequencies of the radiating element are analyzed by using first four characteristic modes. First two modes only have wideband behavior and are excited by CPW feeding technique. The proposed antenna is printed on a low cost FR4 substrate with a size of 35× 50× 1.6 mm 3 and impedance bandwidth ranging from 1.6 to 3.8 GHz for the applications of GSM, DCS, LTE, and WIMAX. To validate the proposed approach, the wideband antenna is fabricated and tested. A wide impedance bandwidth of 81% with |S 11 | < −10 dB is achieved for both simulation and measurement results.

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“…However, these techniques are implemented in high frequency bands, and it is challenging to apply them in lowfrequency bands. It has been proved that MIMO antenna designs that adopt different modes are effective solutions to achieve high isolation and low correlation even in low frequencies [9][10][11][12]. The fundamental electric dipole mode and a magnetic dipole mode were utilised in [9], and the diagonal antenna-chassis mode was investigated in [10]; however, the bandwidths decreased due to high quality factors of the antennas.…”

Section: Introductionmentioning

confidence: 99%

“…The fundamental electric dipole mode and a magnetic dipole mode were utilised in [9], and the diagonal antenna-chassis mode was investigated in [10]; however, the bandwidths decreased due to high quality factors of the antennas. MIMO designs using characteristic mode analysis were proposed in [11], and an orthogonal T-mode technique was employed by manipulating Tstrips [12]. However, the antenna size in [11] and the volume of Tstrips in [12] were too large for most mobile phones.…”

Section: Introductionmentioning

confidence: 99%

“…MIMO designs using characteristic mode analysis were proposed in [11], and an orthogonal T-mode technique was employed by manipulating Tstrips [12]. However, the antenna size in [11] and the volume of Tstrips in [12] were too large for most mobile phones. Furthermore, mode-controlled ground radiation antennas in [13,14] give possible solutions for metal rim MIMO designs, however they are only analysed in a single antenna application.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

MIMO antennas using controlled orthogonal characteristic modes by metal rims

Lee

Shin

et al. 2017

IET Microwaves, Antennas & Propagation

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A metal‐rimmed multiple‐input multiple‐output (MIMO) antenna design operating below the 1 GHz frequency band is proposed that offers a wide bandwidth, high isolation, low correlation, and compact size. The proposed technique is based on metal‐rimmed mobile phones with four gaps, and the overall design occupies a small size in the ground plane. Orthogonal ground mode resonances are controlled to be equal to the operating frequencies, providing high antenna performance and good diversity performance. The proposed main antenna is achieved by utilizing the upper‐side rim to tune the ground mode resonance along the length of the ground plane to be equal to the operating frequency; moreover, a coupling slot couples strongly with the ground mode resonance to achieve a ‐6 dB bandwidth from 0.695 to 1 GHz (305 MHz). The orthogonal ground mode along the width of the ground plane is used for diversity antenna design. Similarly, the ground mode resonance is made equal to the operating frequency by controlling the left‐side metal rim such that a simulated ‐6 dB bandwidth from 0.850 to 0.920 GHz (70 MHz) is achieved. The simulated isolation is more than 11.5 dB in the operating band, and the measured envelope correlation coefficients is below 0.1.

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Identifying the Appropriate Position on the Ground Plane for MIMO Antennas Using Characteristic Mode Analysis

Cited by 12 publications

References 9 publications

Estimation of Antenna Correlation Coefficient of N -Port Lossy MIMO Array

Estimation of Antenna Correlation Coefficient of N -Port Lossy MIMO Array

Characteristic Mode Analysis of Wideband Microstrip Antenna

MIMO antennas using controlled orthogonal characteristic modes by metal rims

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