Scholars@Duke

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

Publication ,  Journal Article
Liu, L; Ghassemlooy, Z; Sambell, A; Danaher, S; Smith, D
Published in: IEEE Transactions on Antennas and Propagation
January 1, 2013
Published version (DOI)

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. © 1963-2012 IEEE.

Duke Scholars

David R. Smith
Author David R. Smith Electrical and Computer Engineering

Published In

IEEE Transactions on Antennas and Propagation

DOI

10.1109/TAP.2013.2275745

ISSN

0018-926X

Publication Date

January 1, 2013

Volume

61

Issue

11

Start / End Page

5785 / 5787

Related Subject Headings

  • Networking & Telecommunications
  • 4009 Electronics, sensors and digital hardware
  • 4008 Electrical engineering
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
 

Citation

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Liu, L., Ghassemlooy, Z., Sambell, A., Danaher, S., & Smith, D. (2013). Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter. IEEE Transactions on Antennas and Propagation, 61(11), 5785–5787. https://doi.org/10.1109/TAP.2013.2275745
Liu, L., Z. Ghassemlooy, A. Sambell, S. Danaher, and D. Smith. “Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter.” IEEE Transactions on Antennas and Propagation 61, no. 11 (January 1, 2013): 5785–87. https://doi.org/10.1109/TAP.2013.2275745.
Liu L, Ghassemlooy Z, Sambell A, Danaher S, Smith D. Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter. IEEE Transactions on Antennas and Propagation. 2013 Jan 1;61(11):5785–7.
Liu, L., et al. “Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter.” IEEE Transactions on Antennas and Propagation, vol. 61, no. 11, Jan. 2013, pp. 5785–87. Scopus, doi:10.1109/TAP.2013.2275745.
Liu L, Ghassemlooy Z, Sambell A, Danaher S, Smith D. Investigation of transformer turns ratio between feed and slot of aperture coupled slot antenna by using S11 parameter. IEEE Transactions on Antennas and Propagation. 2013 Jan 1;61(11):5785–5787.

Published In

IEEE Transactions on Antennas and Propagation

DOI

10.1109/TAP.2013.2275745

ISSN

0018-926X

Publication Date

January 1, 2013

Volume

61

Issue

11

Start / End Page

5785 / 5787

Related Subject Headings

  • Networking & Telecommunications
  • 4009 Electronics, sensors and digital hardware
  • 4008 Electrical engineering
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering