Extremely Small, Wide-band Mobile Phone Antennas by Inductive Chassis Mode Coupling

Schroeder,; Vila, R.; Thome,

doi:10.1109/ecwt.2006.280524

Cited by 14 publications

(10 citation statements)

References 6 publications

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“…The proposed antenna uses the slot between the lid and the base part of a laptop which is a specific feature of laptops and two types of mobile phones. Folder-and slider-type mobile phones consist of two separate ground-planes that can be exploited for the antenna placement as shown in [6]. However, the use of a slot was also proposed for a bar-type mobile phone form factor [7].…”

Section: Introductionmentioning

confidence: 99%

MIMO LTE antenna design for laptops based on theory of characteristic modes

Krewski

Schroeder

Solbach

2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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In this paper the theory of characteristic modes is employed to find eigenvalues and current distributions of all relevant modes on a monocoque laptop chassis in the frequency range below 1 GHz. Based on these results a novel type of antenna (inductive coupler), located in the slot between the lid and the base part of the laptop, which exploits one of the characteristic modes is introduced and its performance optimized for the LTE low-and mid-band frequency range. In order to design a MIMO antenna system an additional, conventional antenna (capacitive coupler) is placed at the top of the laptop's lid. Both antennas excite mutually orthogonal current distributions on the laptop's chassis which results in an excellent MIMO antenna performance.

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Section: Introductionmentioning

confidence: 99%

MIMO LTE antenna design for laptops based on theory of characteristic modes

Krewski

Schroeder

Solbach

2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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“…Internal DVB-H antennas are preferred for their compact size and robustness. Internal DVB-H antennas developed for clamshell phones have been presented in [2] [3]. For bar-type phones, due to their smaller size, it is more difficult to achieve wideband match [4].…”

Section: Introductionmentioning

confidence: 99%

Coexistence of an Electrically Tunable DVB-H Antenna with the GSM Transmitter in a Mobile Phone

Huang¹,

Schroeder²,

Russer

2007

2007 IEEE/MTT-S International Microwave Symposium

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Integration of DVB-H into mobile terminals is of high topical interest. In many cases the physical size of the terminal and antenna is too small to allow for coverage of the full DVB-H band. This paper presents an electrically tunable DVB-H antenna which covers the frequency range 462 ... 696 MHz with a return loss of at least 7 dB and remarkable radiation efficiency, using a volume of only 6 cm3. Emphasis is on the problem of coexistence of DVB-H with EGSM 900 operation which arises from the nonlinearity of the tuning element for the DVB-H antenna. A novel combination of non-linearity mitigation techniques is proposed to overcome the problem.

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“…As a result, the influence of the mobile chassis is a critical design factor for multiple antenna systems at low frequency bands. However, nearly all existing studies of the impact of chassis on antenna design (e.g., [5], [6]) focus their attention on single antenna design.…”

Section: Introductionmentioning

confidence: 99%

Optimal multiple antenna design for compact MIMO terminals with ground plane excitation

Lau

Ying

2011

2011 International Workshop on Antenna Technology (iWAT)

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ABSTRACT:The compactness of mobile terminals complicates the design of multiple antennas, since coupling among the antennas increases when they are placed in proximity of one another. While it is possible to mitigate coupling between closely spaced antennas, a tradeoff in bandwidth is required. In this paper, we highlight ground plane excitation as an additional dimension to consider in the design of multiple antenna terminals. This is because a compact ground plane, especially in mobile application, can interact with the antenna elements and contribute significantly to their radiation characteristics. Our results show that several design parameters, namely element locations, spacing between elements, and radiation characteristics of individual elements, must be jointly considered in order to achieve the optimal MIMO performance tradeoff for compact multiple antenna terminals.

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Extremely Small, Wide-band Mobile Phone Antennas by Inductive Chassis Mode Coupling

Cited by 14 publications

References 6 publications

MIMO LTE antenna design for laptops based on theory of characteristic modes

MIMO LTE antenna design for laptops based on theory of characteristic modes

Coexistence of an Electrically Tunable DVB-H Antenna with the GSM Transmitter in a Mobile Phone

Optimal multiple antenna design for compact MIMO terminals with ground plane excitation

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