Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter

Lei Liu; Zabih Ghassemlooy; Alistair Sambell; Sean Danaher; David Smith

doi:10.1109/TAP.2013.2275745

Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S₁₁ parameter

Lei Liu, Zabih Ghassemlooy, Alistair Sambell, Sean Danaher, David Smith

Northumbria University

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

This communication presents a simplified design approach to obtain the turns ratio N_f which models the coupling between the microstrip feed and slot line of an aperture coupled slot antenna by using the S₁₁ parameter. Equations are derived using S₁₁ parameter to determine N_f and simulations are carried out at 2 GHz using substrates of PCB FR4, Duroid 5870, and Duroid 6010. Results indicate N_f is proportional to the slot length from 0 to 20 mm increasing rapidly with length. Over 20 mm slot length, the trend reduces and the value of N_f tends towards 1. In addition, N_f varies with the height of substrate but is little affected by dielectric constant of substrate which could therefore be ignored to simplify the design procedure. Measured results show good agreement with the theoretical model.

Original language	English
Article number	6571246
Pages (from-to)	5785-5787
Number of pages	3
Journal	IEEE Transactions on Antennas and Propagation
Volume	61
Issue number	11
Early online date	30 Jul 2013
DOIs	https://doi.org/10.1109/TAP.2013.2275745
Publication status	Published - 1 Nov 2013
Externally published	Yes

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Cite this

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title = "Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter",

abstract = "This communication presents a simplified design approach to obtain the turns ratio Nf which models the coupling between the microstrip feed and slot line of an aperture coupled slot antenna by using the S11 parameter. Equations are derived using S11 parameter to determine Nf and simulations are carried out at 2 GHz using substrates of PCB FR4, Duroid 5870, and Duroid 6010. Results indicate Nf is proportional to the slot length from 0 to 20 mm increasing rapidly with length. Over 20 mm slot length, the trend reduces and the value of Nf tends towards 1. In addition, Nf varies with the height of substrate but is little affected by dielectric constant of substrate which could therefore be ignored to simplify the design procedure. Measured results show good agreement with the theoretical model.",

keywords = "Aperture coupled slot antenna, slot lines, transformer turns ratios, scattering parameter S11",

author = "Lei Liu and Zabih Ghassemlooy and Alistair Sambell and Sean Danaher and David Smith",

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doi = "10.1109/TAP.2013.2275745",

language = "English",

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T1 - Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter

AU - Liu, Lei

AU - Ghassemlooy, Zabih

AU - Sambell, Alistair

AU - Danaher, Sean

AU - Smith, David

PY - 2013/11/1

Y1 - 2013/11/1

N2 - This communication presents a simplified design approach to obtain the turns ratio Nf which models the coupling between the microstrip feed and slot line of an aperture coupled slot antenna by using the S11 parameter. Equations are derived using S11 parameter to determine Nf and simulations are carried out at 2 GHz using substrates of PCB FR4, Duroid 5870, and Duroid 6010. Results indicate Nf is proportional to the slot length from 0 to 20 mm increasing rapidly with length. Over 20 mm slot length, the trend reduces and the value of Nf tends towards 1. In addition, Nf varies with the height of substrate but is little affected by dielectric constant of substrate which could therefore be ignored to simplify the design procedure. Measured results show good agreement with the theoretical model.

AB - This communication presents a simplified design approach to obtain the turns ratio Nf which models the coupling between the microstrip feed and slot line of an aperture coupled slot antenna by using the S11 parameter. Equations are derived using S11 parameter to determine Nf and simulations are carried out at 2 GHz using substrates of PCB FR4, Duroid 5870, and Duroid 6010. Results indicate Nf is proportional to the slot length from 0 to 20 mm increasing rapidly with length. Over 20 mm slot length, the trend reduces and the value of Nf tends towards 1. In addition, Nf varies with the height of substrate but is little affected by dielectric constant of substrate which could therefore be ignored to simplify the design procedure. Measured results show good agreement with the theoretical model.

KW - Aperture coupled slot antenna

KW - slot lines

KW - transformer turns ratios

KW - scattering parameter S11

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Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S₁₁ parameter

Abstract

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