A vehicular-mounted vertical space diversity antenna for a land mobile radio

Ebine, Yoshio; Yamada, Yoshıhıde

doi:10.1109/25.289423

Cited by 25 publications

(11 citation statements)

References 3 publications

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“…We employ a correlation coefficient [7], which has a substantial impact on the diversity gains, as a criterion in the diversity mode. To simplify, the elevation angle of the arriving waves is assumed to be distributed only in the horizontal direction.…”

Section: Correlation Coefficientmentioning

confidence: 99%

Novel internal multi-antenna configuration employing folded dipole elements for notebook PC

Okano¹,

Cho²

2006

2006 First European Conference on Antennas and Propagation

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This paper proposes a novel internal multi-antenna configuration employing folded dipole elements for notebook PCs. We take particular note of the properties of the folded dipole antennas that eliminate the undesired current on the ground plane. Employing folded dipole antennas in a multi-antenna configuration, mounted at the four corners of the upper ground plane of a notebook PC model, resulted in an approximate 5 dB increase in the pattern averaging gain compared to that for inverted-L antennas, which are popularly used as internal antennas equipped in mobile equipment. Furthermore, evaluated results of the multi-antenna performance showed that the proposed quad folded dipole antenna configuration achieves an approximate 6 dB higher beamforming gain and approximately double the MIMO channel capacity, respectively, compared to those for a quad inverted-L antenna configuration with a low correlation coefficient of less than 0.2.

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Section: Correlation Coefficientmentioning

confidence: 99%

Novel internal multi-antenna configuration employing folded dipole elements for notebook PC

Okano¹,

Cho²

2006

2006 First European Conference on Antennas and Propagation

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“…He finds the outage probability [6], [7] between two vehicles on a road. Ebine and Yamada measured the gains from a vertically spaced diversity antenna mounted on a vehicle [8]. However the system is a cellular system utilizing tall base station antennas, and the spatial diversity gain is achieved from the diversity in radiation patterns.…”

Section: Related Workmentioning

confidence: 99%

Exploiting vertical diversity in vehicular channel environments

Kaul

Gruteser

2009

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications

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Abstract-Antenna diversity is a well-known technique used to improve the quality and reliability of a wireless link. In vehicular networks, a different approach to antenna diversity is needed due to their unique channel characteristics. However, this issue has not been actively researched, especially for the positioning of antennas. In this paper, we highlight the benefit of vertical diversity over traditional horizontal diversity techniques in vehicular network environments. Through experiments using IEEE 802.11a radios in the 5.2GHz band, we first show the difference of attenuation patterns from various antenna positions installed in a vehicle, then we show the benefit of vertical diversity by quantifying the diversity gains and combined error rates. This finding has implications for the future position of antenna installation in vehicles.

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“…The envelope correlation coe cient was computed using the measurements by an average in each main plane using the well-known equation, expressed in the digital case by (Tsunekawa andKagoshima 1989, Ebine andYamada 1991) »ˆj …1=N † P N nˆ1 s 1 *… n †s 2 … n †j 2 …1=N 2 † f P N nˆ1 js 1 … n †j 2 P N nˆ1 js 2 … n †j 2 g …9 †…”

Section: T He Envelope Correlation Coe Cientmentioning

confidence: 99%

Characterization and experimental study of a two-sensor portable terminal for mobile communications

Clenet¹,

Sharaiha²,

Terret³

et al. 2000

International Journal of Electronics

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The present work investigates the reception improvement using a multi-sensor experimental portable terminal. Its antenna system consists of two circularly polarized microstrip antennas placed on a folded cover. Inside the terminal, two identical processing channels realize the ampli® cation, down-conversion and ® ltering in order to collect the intermediate frequency signals. Measurements were made in an anechoic chamber to evaluate the source vector and to estimate the performance of the signal processing in terms of diversity processing. Results from measurement have been compared with the theoretical results. Reception improvement using space diversity processing is pointed out in the case of di erent scenarios considering data collected with the experimental receiver in a real environment.

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A vehicular-mounted vertical space diversity antenna for a land mobile radio

Cited by 25 publications

References 3 publications

Novel internal multi-antenna configuration employing folded dipole elements for notebook PC

Novel internal multi-antenna configuration employing folded dipole elements for notebook PC

Exploiting vertical diversity in vehicular channel environments

Characterization and experimental study of a two-sensor portable terminal for mobile communications

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