Two-port probe-fed circular antenna model

Two-Port Probe-Fed Circular Antenna

A two-port probe-fed circular microstrip antenna is simulated as an example.

This example presents the computation of the S-parameters for a two-port probe-fed circular microstrip antenna. The antenna was orginally analysed in [1], allowing simple validation of the FEKO results. The model was set up with a special Green’s function infinite plane modelling the substrate.

 Two-port probe-fed circular antenna model

Figure 1: Two-port probe-fed circular antenna model

Dimensions

  • Patch radius = 20 mm.
  • Substrate:
    • εr = 2.2,
    • tan δ = 0.001,
    • h = 2.1844 mm.
  • Probe 1 (x1, y1) = (7.0, 0.0) mm.
  • Probe 2 (x2, y2) = (0.0, 7.0) mm.
  • Probe radius = 0.45 mm.

Simulation Results

Figure 2 presents an S-parameter analysis for this two-port microstrip patch.  Comparison with [1, Figure 4] is excellent, validating FEKO’s results.

S-parameters

Figure 2: S-parameters computed with FEKO

 

[1] J. T. Aberle, D. M. Pozar, and C. R. Birtcher, “Evaluation of input impedance and radar cross section of probe-fed microstrip patch elements using an accurate feed model,” IEEE Trans. on Antennas and Propagation, vol. 39, pp. 1691–1696, Dec. 1991.

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Two-port Probe-fed Circular Antenna – FEKO 6.1 example (6.2 compatible)

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Two-port Probe-fed Circular Antenna – FEKO 5.3 example (FEKO 5.4 Compatible)