Analysis of the radiation characteristics of CRLH LWAs around broadside

Juan Sebastian Gomez Diaz; A. Alvarez-Melcon; J. Perruisseau-Carrier

doi:10.1109/EuCAP.2012.6205934

Analysis of the radiation characteristics of CRLH LWAs around broadside

Juan Sebastian Gomez Diaz, A. Alvarez-Melcon, J. Perruisseau-Carrier

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

9 Scopus citations

Abstract

A study of the characteristics of lossy composite right/left-handed (CRLH) leaky-wave antennas (LWAs) is presented. It is analytically shown that the fulfilment of the Heaviside condition in this media leads to an undistorted phase constant, a frequency-independent attenuation constant and a purely real characteristic impedance. In addition, closed-formed expressions for the efficiency and radiation rate of the antenna, valid around the transition frequency, are derived. It is found that the antenna efficiency depends on the individual efficiencies of the series and shunt branches of the unit cell, which are decoupled. Also, it is shown that the simultaneous presence of series and shunt radiation resistors is not necessary to obtain radiation at broadside. However, in this case the antenna efficiency will always be below of 50%. Full-wave simulations results are included to demonstrate the validity of the developed circuit-based theory.

Original language	English (US)
Title of host publication	Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012
Pages	2876-2880
Number of pages	5
DOIs	https://doi.org/10.1109/EuCAP.2012.6205934
State	Published - Jul 2 2012
Externally published	Yes
Event	6th European Conference on Antennas and Propagation, EuCAP 2012 - Prague, Czech Republic Duration: Mar 26 2012 → Mar 30 2012

Other

Other	6th European Conference on Antennas and Propagation, EuCAP 2012
Country	Czech Republic
City	Prague
Period	3/26/12 → 3/30/12

ASJC Scopus subject areas

Computer Networks and Communications

Access to Document

10.1109/EuCAP.2012.6205934

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Gomez Diaz, JS, Alvarez-Melcon, A & Perruisseau-Carrier, J 2012, Analysis of the radiation characteristics of CRLH LWAs around broadside. in Proceedings of 6th European Conference on Antennas and Propagation, EuCAP 2012., 6205934, pp. 2876-2880, 6th European Conference on Antennas and Propagation, EuCAP 2012, Prague, Czech Republic, 3/26/12. https://doi.org/10.1109/EuCAP.2012.6205934

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abstract = "A study of the characteristics of lossy composite right/left-handed (CRLH) leaky-wave antennas (LWAs) is presented. It is analytically shown that the fulfilment of the Heaviside condition in this media leads to an undistorted phase constant, a frequency-independent attenuation constant and a purely real characteristic impedance. In addition, closed-formed expressions for the efficiency and radiation rate of the antenna, valid around the transition frequency, are derived. It is found that the antenna efficiency depends on the individual efficiencies of the series and shunt branches of the unit cell, which are decoupled. Also, it is shown that the simultaneous presence of series and shunt radiation resistors is not necessary to obtain radiation at broadside. However, in this case the antenna efficiency will always be below of 50%. Full-wave simulations results are included to demonstrate the validity of the developed circuit-based theory.",

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N2 - A study of the characteristics of lossy composite right/left-handed (CRLH) leaky-wave antennas (LWAs) is presented. It is analytically shown that the fulfilment of the Heaviside condition in this media leads to an undistorted phase constant, a frequency-independent attenuation constant and a purely real characteristic impedance. In addition, closed-formed expressions for the efficiency and radiation rate of the antenna, valid around the transition frequency, are derived. It is found that the antenna efficiency depends on the individual efficiencies of the series and shunt branches of the unit cell, which are decoupled. Also, it is shown that the simultaneous presence of series and shunt radiation resistors is not necessary to obtain radiation at broadside. However, in this case the antenna efficiency will always be below of 50%. Full-wave simulations results are included to demonstrate the validity of the developed circuit-based theory.

AB - A study of the characteristics of lossy composite right/left-handed (CRLH) leaky-wave antennas (LWAs) is presented. It is analytically shown that the fulfilment of the Heaviside condition in this media leads to an undistorted phase constant, a frequency-independent attenuation constant and a purely real characteristic impedance. In addition, closed-formed expressions for the efficiency and radiation rate of the antenna, valid around the transition frequency, are derived. It is found that the antenna efficiency depends on the individual efficiencies of the series and shunt branches of the unit cell, which are decoupled. Also, it is shown that the simultaneous presence of series and shunt radiation resistors is not necessary to obtain radiation at broadside. However, in this case the antenna efficiency will always be below of 50%. Full-wave simulations results are included to demonstrate the validity of the developed circuit-based theory.

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