Personal tools
Sections
You are here: Home › Applications › White Papers › Two-port Probe-fed Circular Antenna

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.

 

Figure 1:  Two-port probe-fed circular antenna model
 Dimensions
Two-port probe model
  • 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.

Figure 2:  S-parameters computed with FEKO
S-parameter Smith chart (small)

 

 

[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.
Related content
PublishedArticleEvaluation of input impedance and radar cross section of probe-fed microstrip patch elements using an accurate feed model