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Analysis and size reduction of various printed monopoles with different shapes

Analysis and size reduction of various printed monopoles with different shapes

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A simple analysis based on the transmission line model applied to printed dipole antennas, and the Babinet principle allows different shapes of printed monopole antennas to be easily optimised. A shortening ratio (ρ) of 48% (respectively 30%, 40%) is achieved for the monopole antenna by using a step change in line width (respectively a triangular monopole, and a line with a triangular cap). Theoretical input impedance of these various monopoles compare closely with experimental results.

Inspec keywords: monopole antennas; transmission line theory; dipole antennas; microstrip antennas; antenna theory

Other keywords: printed monopole antennas; optimisation; transmission line model; size reduction; shortening ratio; printed dipole antennas; triangular monopole; shape analysis; input impedance; triangular cap; line width; Babinet principle

Subjects: Single antennas; Antenna theory

References

    1. 1)
      • M. Himdi , J.P. Daniel . Analysis of microstrip linear slot antenna using lossy transmission linemodel. Electron. Lett. , 6 , 598 - 600
    2. 2)
      • Lebbar, H., Himdi, M., Daniel, J.P.: `Analysis and optimization of reduced printed monopole', IEEE/AP-S. Symp. and URSI Meeting, 1993, Michigan, , p. 1858–1861.
    3. 3)
      • H. Lebbar , M. Himdi , J.P. Daniel . Transmission line analysis of printed monopole. Electron. Lett. , 14 , 1326 - 1327
    4. 4)
      • S.B. Cohn . Slot line an dielectric substrate. IEEE Trans. , 10 , 768 - 778
    5. 5)
      • Nesic, A., Radnovic, I.: `Experimental study of the new broadband printed antenna structure', URSI, Radio Science Meeting, 1993, Michigan, p. 21.
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