High-Efficiency Sea-Water Monopole Antenna for Maritime Wireless Communications

Hua, Changzhou; Shen, Zhongxiang; Lu, Jian

doi:10.1109/tap.2014.2360210

Cited by 126 publications

(72 citation statements)

References 16 publications

(30 reference statements)

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“…The calculated theoretical radiation efficiency of the human body is close to the measured radiation efficiency of a seawater monopole antenna, a maximum of 75 %, in the frequency range of 40-200 MHz [20]. In other studies [11], [21], measurements on saline based equivalent cylindrical monopole antennas of the human body were used to estimate the induced ankle current computed using a realistic voxel model of the human body.…”

Section: Radiation Efficiency and Reflection Coefficientsupporting

confidence: 62%

Characterizing the Human Body as a Monopole Antenna

Kibret

Teshome

Lai

2015

IEEE Trans. Antennas Propagat.

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This paper, for the first time, fully characterizes the human body as a monopole antenna in the frequency range of 10 -110 MHz, which contains the resonance frequency of the human body. The human body is represented by an equivalent cylindrical monopole antenna grounded on a highly conductive ground plane that is analysed based on the three-term approximation method. The reflection coefficient is measured using a human subject as a monopole antenna. Measurement results show that the theoretical predictions are in reasonable agreement. It is found that the human body resonates between 40 -60 MHz depending on the posture of the body when it is fed by a 50 Ω impedance system at the base of the foot. A minimum reflection coefficient of -12 dB is measured that demonstrates that the human body can be potentially used as an antenna. Theoretically, it is predicted that the human body can be an efficient antenna with a maximum radiation efficiency reaching up to 70 %, which is supported by measurement results found in the literature.

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Section: Radiation Efficiency and Reflection Coefficientsupporting

confidence: 62%

Characterizing the Human Body as a Monopole Antenna

Kibret

Teshome

Lai

2015

IEEE Trans. Antennas Propagat.

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“…The input impedance of sea‐water dipole antenna has been investigated in Ref. by employing the 3‐term theory. Herein, the sea‐water dipole is treated as an imperfect conducting cylinder.…”

Section: Geometry Analysis and Designmentioning

confidence: 99%

“…In Ref. , a theoretical study about sea‐water monopole antenna was first carried out. Due to the low conductivity of sea water, the presented monopole was treated as imperfect conductor .…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of sea-water monopole Yagi-Uda antenna with pattern reconfigurability

Wang

et al. 2018

Int J RF Microw Comput Aided Eng

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In this article, a theoretical study of sea‐water monopole Yagi‐Uda antenna is presented. Unlike the conventional metal one, sea‐water monopole is here treated as imperfect conductor. Based on this precondition, a methodology for analyzing sea‐water monopole Yagi‐Uda antenna is proposed by employing the 3‐term theory and voltage‐current relation. As such, both its input impedance and radiation pattern can be theoretically predicted. Commercial software packages ANSYS HFSS and CST Microwave Studio are used to verify the proposed methodology. Finally, a prototype is designed, fabricated, and tested. Due to the liquidity of sea water, the parasitic element can work as a director or reflector by altering its height to achieve pattern reconfigurability. Measured results show reasonably good agreement with the simulated and theoretical ones.

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“…ATER antennas are a special type of liquid antennas and have attracted increasing attention in recent years [1][2][3][4]. It utilizes water as the medium to transmit and receive signals.…”

Section: Introductionmentioning

confidence: 99%

A Broadband Hybrid Water Antenna for Hand-Portable Applications

Xing

Huang

et al. 2016

Antennas Wirel. Propag. Lett.

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In this paper, a broadband, low profile, hybrid water antenna is proposed. The hybrid structure combines the resonance of the dielectric resonator (DR) and the resonance of the monopole together to cover the required frequency band. The unique features of the water DR are transparency, reconfigurability, and liquidity which allows complex structures (including the antenna feeding line) to be placed and tuned inside water easily. Both the computer simulations and measurements are conducted to validate the antenna performance. The proposed antenna has a -6 dB impedance bandwidth from 430 to 900 MHz (a fractional bandwidth of 70%). Compared with other antennas for this band, this new antenna has a wider bandwidth, more compact size and simpler structure. It is therefore a very promising candidate for hand-portable applications such as DVB-H (470 to 862 MHz). Index Terms-water antenna, broadband antenna, liquid dielectric, DVB-H.

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High-Efficiency Sea-Water Monopole Antenna for Maritime Wireless Communications

Cited by 126 publications

References 16 publications

Characterizing the Human Body as a Monopole Antenna

Characterizing the Human Body as a Monopole Antenna

Analysis and design of sea-water monopole Yagi-Uda antenna with pattern reconfigurability

A Broadband Hybrid Water Antenna for Hand-Portable Applications

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