Equivalent-Circuit Modelling of Chassis Radiator

Bulus, Umut; Famdie, Celestine; Solbach, Klaus

doi:10.1109/gemic.2009.4815895

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…The field is normalized to the maximum value and presented in dB scale. The field corresponds to that of a flat half-wavelength dipole [21]. It can be observed that the electric field is stronger at the edges, especially at the corners, whereas it becomes very weak at the center of the chassis.…”

Section: Characteristic Mode Analysismentioning

confidence: 90%

“…To analyze the mobile chassis, different tools can be utilized, such as resonator based equivalent circuit [20], flat dipole equivalent circuit [21] and theory of characteristic mode [22]. Among these tools, a characteristic mode based analysis is an efficient way to gain physical insight into fundamental electromagnetic properties of mobile chassis and yield valuable information on antenna design.…”

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confidence: 99%

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Characteristic Mode Based Tradeoff Analysis of Antenna-Chassis Interactions for Multiple Antenna Terminals

Tan

Lau

et al. 2012

IEEE Trans. Antennas Propagat.

149

134

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The design of multiple antennas in compact mobile terminals is a significant challenge, due to both practical and fundamental design tradeoffs. In this paper, fundamental antenna design tradeoffs of multiple antenna terminals are presented in the framework of characteristic mode analysis. In particular, interactions between the antenna elements and the characteristic modes and their impact on design tradeoffs are investigated in both theory and simulations. The results reveal that the characteristic modes play an important role in determining the optimal placement of antennas for low mutual coupling. Moreover, the ability of antenna elements to localize the excitation currents on the chassis can significantly influence the final performance. To demonstrate the effectiveness of the proposed approach, a dual-band, dual-antenna terminal is designed to provide an isolation of over 10 dB for the 900 MHz band without additional matching or decoupling structures. A tradeoff analysis of bandwidth, efficiency, effective diversity gain and capacity is performed over different antenna locations. Finally, three fabricated prototypes verify the simulation results for representative cases. Index Terms-Antenna array mutual coupling, MIMO systems, mobile communication I. INTRODUCTION HE phenomenal success of multiple-input multiple-output (MIMO) technology can be seen in its critical role of enabling high data rates in Long Term Evolution (LTE), Worldwide Interoperability for Microwave Access (WiMAX) and IEEE802.11n. The key advantage of MIMO is its potential to linearly increase channel capacity with the number of Manuscript received June 1, 2010.

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Section: Characteristic Mode Analysismentioning

confidence: 90%

mentioning

confidence: 99%

Characteristic Mode Based Tradeoff Analysis of Antenna-Chassis Interactions for Multiple Antenna Terminals

Tan

Lau

et al. 2012

IEEE Trans. Antennas Propagat.

149

134

View full text Add to dashboard Cite

show abstract

“…In essence, a flat electric dipole antenna can be formed by appropriately exciting the entire chassis with an antenna element [13]. To illustrate the mechanism of chassis excitation, we used the theory of characteristic mode [14] to calculate the characteristic electric and magnetic fields of the chassis.…”

Section: Electric and Magnetic Dipole Antennasmentioning

confidence: 99%

Decoupling of Multiple Antennas in Terminals With Chassis Excitation Using Polarization Diversity, Angle Diversity and Current Control

Lau

Ying³

et al. 2012

IEEE Trans. Antennas Propagat.

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“…An alternative (or complementary) method for the analysis of the chassis radiation is equivalent circuit modeling [1], [33], [34]. The few lowest-order wavemodes of the chassis and of the CCE (or antenna element) can be modeled as resonators consisting of lumped elements.…”

Section: A Characteristic Mode Analysismentioning

confidence: 99%

Capacitive coupling elements — Changing the way of designing antennas

Valkonen

Lehtovuori

Manteuffel

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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Since the beginning of the century, it was gradually understood how the metallic chassis of a mobile handset can be utilized as the main radiating element of a mobile terminal antenna. After a decade of research, the use of inherently non-resonant coupling elements has become a competitive antenna choice in today's multi-standard mobile handsets. This paper combines the use of some helpful computational tools to synthesize a mobile handset antenna capable of satisfying the requirements of today's mobile communications standards at 0.7-0.96 GHz and 1.71-3.6 GHz with good performance. We also demonstrate how the CCE concept can be extended beyond mobile communications.

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Equivalent-Circuit Modelling of Chassis Radiator

Cited by 8 publications

References 6 publications

Characteristic Mode Based Tradeoff Analysis of Antenna-Chassis Interactions for Multiple Antenna Terminals

Characteristic Mode Based Tradeoff Analysis of Antenna-Chassis Interactions for Multiple Antenna Terminals

Decoupling of Multiple Antennas in Terminals With Chassis Excitation Using Polarization Diversity, Angle Diversity and Current Control

Capacitive coupling elements — Changing the way of designing antennas

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Equivalent-Circuit Modelling of Chassis Radiator

Cited by 8 publications

References 6 publications

Characteristic Mode Based Tradeoff Analysis of Antenna-Chassis Interactions for Multiple Antenna Terminals

Characteristic Mode Based Tradeoff Analysis of Antenna-Chassis Interactions for Multiple Antenna Terminals

Decoupling of Multiple Antennas in Terminals With Chassis Excitation Using Polarization Diversity, Angle Diversity and Current Control

Capacitive coupling elements &#x2014; Changing the way of designing antennas

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Capacitive coupling elements — Changing the way of designing antennas