Spatial diversity two-branch antenna for wireless devices

Mavridis, G.; Sahalos, John N.; Chryssomallis, M.T.

doi:10.1049/el:20063994

Cited by 42 publications

(32 citation statements)

References 3 publications

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“…The parameters usually presented to evaluate the diversity performances are the correlation coefficient [26], [27] and the effective diversity gain (EDG) [28]. The definition of the diversity gain and the measurement method in a mode-stirred reverberation chamber are presented in [29].…”

Section: B Diversity Performances Measurementmentioning

confidence: 99%

Frequency Tunable Antenna Using a Magneto-Dielectric Material for DVB-H Application

Huitema

Reveyrand

Mattéi

et al. 2013

IEEE Trans. Antennas Propagat.

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Abstract-This paper presents an ultracompact antenna design suited for digital video broadcasting-handheld (DVB-H) reception devices. The DVB-H frequency band is ranging from 470 to 862 MHz and divided in 49 channels of 8 MHz. Designed to be integrated in a tablet, it is not only heavily miniaturized ( at 470 MHz), but also able to cover each channel thanks to the use of a magneto-dielectric material. The advantage of using such a material is studied and described in this paper. Moreover, the operating frequency is continuously tuned over the whole DVB-H band by the integration of a varactor diode. This varactor diode has been characterized and modeled to properly cosimulate its behavior within the antenna. Limitations in terms of accepted power by the diode are emphasizing. Finally, the antenna design, including both magneto-dielectric material and varactor diode is integrated in the DVB-H receiver device. Measurement performances are presented and discussed.Index Terms-Digital video broadcasting-handheld (DVB-H), frequency tunable antenna, magneto-dielectric material, miniature antenna, pattern diversity, varactor diode.

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Section: B Diversity Performances Measurementmentioning

confidence: 99%

Frequency Tunable Antenna Using a Magneto-Dielectric Material for DVB-H Application

Huitema

Reveyrand

Mattéi

et al. 2013

IEEE Trans. Antennas Propagat.

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“…Typically, spatial structure is one of several wireless diversity methods employed to improve the quality and reliability of a wireless link by using two or more antennas that are co-located toward each other [7][8][9]. In this research, the capability of this structure in producing pattern diversity (phase changing) with the support of the PIN diode switches has been exploited as a novel phase shifter for the beam steering antennas to cover 360 However, the combination of the spatial structure with the PIN diode switches creates greater mutual coupling effects, which exist due to the electromagnetic (EM) interaction between the adjacent antenna elements [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A Novel Green Antenna Phase-Shift System With Data Acquisition Boards

Jamlos

Rahman²,

Kamarudin³

et al. 2012

PIER B

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Abstract-A novel green phase shifter system is proposed in this research. The system is developed by a combination of reconfigurable beam steering antennas and data acquisition (DAQ) boards. A combination of two reconfigurable beam steering antennas, located side-by-side, forms a spatial configuration structure with a fabricated 'green' element plank of rice husk placed in between. The concept of a spatial configuration technique has been 'mutated' by shifting the structure of spiral feed line and aperture slots of first beam steering antenna by as much as 45 • . The PIN diode switches connected to the DAQ boards enable the intelligent capability of the spatial antennas. • . Moreover, a mutual coupling effect generated by the spatial configuration of both antennas is alleviated by the element plank of rice husk, whose width, length, and thickness are 45 mm, 150 mm, and 10 mm, respectively. Possessing the characteristics of an adaptive new phase shifter concept and assisted by the green element of a rice husk, this system is potentially an effective way to decrease the number of drop outs and lost connections, and provides larger coverage. It is a promising candidate for installation with a WiMAX application.

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“…The implementation of compact multiband diversity (or MIMO) antennas is the subject of [5] and [6]. However, instead of mobile communication bands, both studies focus on the wireless-LAN frequency bands of 2.4 and 5.2 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…However, instead of mobile communication bands, both studies focus on the wireless-LAN frequency bands of 2.4 and 5.2 GHz. In [5], the antenna separation of the dual double-T monopoles is greater than half-a-wavelength (0.5λ), even at the lower band. Therefore, good diversity gain is obtained for both bands.…”

Section: Introductionmentioning

confidence: 99%

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Multiband Diversity Antenna Performance Study for Mobile Phones

Avendal

Ying

Lau

2007

2007 International Workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications

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Spatial diversity is a popular multiple antenna system technique, due to simplicity in implementation. However, its application has thus far been limited to systems where the electrical separation between adjacent antennas typically exceeds half a wavelength. This is because a more compact design induces higher antenna correlation and impedance mismatch, which results in lower diversity gains. In this paper, the performance of a compact multiband diversity antenna is investigated in both simulations and measurements. The dual-antenna structure is designed for the future WCDMA bands of WCDMA850, WCDMA1800 and 3G EU (UMTS), where the antenna separation at the WCDMA850 band is 0.24*wavelength. The measured results indicate that an average effective diversity gain of 7.3 dB at the 1% probability level can be achieved for the three bands

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Spatial diversity two-branch antenna for wireless devices

Cited by 42 publications

References 3 publications

Frequency Tunable Antenna Using a Magneto-Dielectric Material for DVB-H Application

Frequency Tunable Antenna Using a Magneto-Dielectric Material for DVB-H Application

A Novel Green Antenna Phase-Shift System With Data Acquisition Boards

Multiband Diversity Antenna Performance Study for Mobile Phones

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