Table 1: Simulated and measured 3-dB beamwidths and gains of the proposed antenna.

Freq.
(GHz)
3-dB beamwidth (deg.)Gain (dBi)
SimulationMeasurementSimulationMeasurement
E-plane/H-plane
( = 0 mm)
E-plane/H-plane
( = 3 mm)
E-plane/H-plane
( = 0 mm)
= 0 mm = 3 mm = 0 mm

1272/71.672.6/70.870.5/65.88.168.367.47
1567/66.360.9/61.760.6/64.28.959.768.7
1862.8/62.560.9/57.768.6/65.19.739.959.36

= 0 mm represents the situation that the width of the brim is equal to the width of the waveguide.