A Partially Driven Array Antenna Backed by a Reflector with a Reduction in the Number of Driven Elements by Up to 67%

Tadashi TAKANO; Takehiro IMURA; Midori OKUMURA

doi:10.1587/transcom.E96.B.2883

A Partially Driven Array Antenna Backed by a Reflector with a Reduction in the Number of Driven Elements by Up to 67%

Tadashi TAKANO, Takehiro IMURA, Midori OKUMURA

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This paper describes a novel technique to replace some of the driven elements in an array antenna with parasitic elements. First, the antenna characteristics are studied by simulation for a basic unit array with one driven and two parasitic elements. The entire antenna is backed with a flat reflector to conform to practical applications. The parasitic elements are excited by the neighboring driven elements through the electromagnetic coupling effect. It is shown that at the optimal coupling condition, the radiation patterns are almost identical with those of an array antenna whose elements are all driven without coupling. The simulation result is confirmed by performing an experiment at 5.8GHz (λ =51.7mm). Finally, a 12-element array is formed by combining four unit arrays. The simulation results show that the maximum antenna gain is 19.4dBi, indicating that there is no penalty with respect to the antenna gain of a fully driven 12-element array. Therefore, the array antenna can be considerably simplified by replacing 67% of its elements with parasitic elements.

Publication: IEICE TRANSACTIONS on Communications Vol.E96-B No.11 pp.2883-2890

Publication Date: 2013/11/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E96.B.2883

Type of Manuscript: PAPER

Category: Antennas and Propagation

Authors

Tadashi TAKANO
  Japan Aerospace Exploration Agency
Takehiro IMURA
  The University of Tokyo
Midori OKUMURA
  Tokai University

Keyword

array antenna, partial drive, driven element, parasitic element, electromagnetic coupling, feed simplification

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Tadashi TAKANO, Takehiro IMURA, Midori OKUMURA, "A Partially Driven Array Antenna Backed by a Reflector with a Reduction in the Number of Driven Elements by Up to 67%" in IEICE TRANSACTIONS on Communications, vol. E96-B, no. 11, pp. 2883-2890, November 2013, doi: 10.1587/transcom.E96.B.2883.
Abstract: This paper describes a novel technique to replace some of the driven elements in an array antenna with parasitic elements. First, the antenna characteristics are studied by simulation for a basic unit array with one driven and two parasitic elements. The entire antenna is backed with a flat reflector to conform to practical applications. The parasitic elements are excited by the neighboring driven elements through the electromagnetic coupling effect. It is shown that at the optimal coupling condition, the radiation patterns are almost identical with those of an array antenna whose elements are all driven without coupling. The simulation result is confirmed by performing an experiment at 5.8GHz (λ =51.7mm). Finally, a 12-element array is formed by combining four unit arrays. The simulation results show that the maximum antenna gain is 19.4dBi, indicating that there is no penalty with respect to the antenna gain of a fully driven 12-element array. Therefore, the array antenna can be considerably simplified by replacing 67% of its elements with parasitic elements.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.E96.B.2883/_p

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@ARTICLE{e96-b_11_2883,
author={Tadashi TAKANO, Takehiro IMURA, Midori OKUMURA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Partially Driven Array Antenna Backed by a Reflector with a Reduction in the Number of Driven Elements by Up to 67%},
year={2013},
volume={E96-B},
number={11},
pages={2883-2890},
abstract={This paper describes a novel technique to replace some of the driven elements in an array antenna with parasitic elements. First, the antenna characteristics are studied by simulation for a basic unit array with one driven and two parasitic elements. The entire antenna is backed with a flat reflector to conform to practical applications. The parasitic elements are excited by the neighboring driven elements through the electromagnetic coupling effect. It is shown that at the optimal coupling condition, the radiation patterns are almost identical with those of an array antenna whose elements are all driven without coupling. The simulation result is confirmed by performing an experiment at 5.8GHz (λ =51.7mm). Finally, a 12-element array is formed by combining four unit arrays. The simulation results show that the maximum antenna gain is 19.4dBi, indicating that there is no penalty with respect to the antenna gain of a fully driven 12-element array. Therefore, the array antenna can be considerably simplified by replacing 67% of its elements with parasitic elements.},
keywords={},
doi={10.1587/transcom.E96.B.2883},
ISSN={1745-1345},
month={November},}

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TY - JOUR
TI - A Partially Driven Array Antenna Backed by a Reflector with a Reduction in the Number of Driven Elements by Up to 67%
T2 - IEICE TRANSACTIONS on Communications
SP - 2883
EP - 2890
AU - Tadashi TAKANO
AU - Takehiro IMURA
AU - Midori OKUMURA
PY - 2013
DO - 10.1587/transcom.E96.B.2883
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E96-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2013
AB - This paper describes a novel technique to replace some of the driven elements in an array antenna with parasitic elements. First, the antenna characteristics are studied by simulation for a basic unit array with one driven and two parasitic elements. The entire antenna is backed with a flat reflector to conform to practical applications. The parasitic elements are excited by the neighboring driven elements through the electromagnetic coupling effect. It is shown that at the optimal coupling condition, the radiation patterns are almost identical with those of an array antenna whose elements are all driven without coupling. The simulation result is confirmed by performing an experiment at 5.8GHz (λ =51.7mm). Finally, a 12-element array is formed by combining four unit arrays. The simulation results show that the maximum antenna gain is 19.4dBi, indicating that there is no penalty with respect to the antenna gain of a fully driven 12-element array. Therefore, the array antenna can be considerably simplified by replacing 67% of its elements with parasitic elements.
ER -