Bi-Directional Antenna Using a Probe-Fed Waveguide Aperture with Stacked-Coupling Apertures

This paper presents a bi-directional beam antenna implemented by using a probe-fed open waveguide with stacked-coupling apertures. This proposed antenna is able to rectify the asymmetrically bi-directional beam to be a symmetry through the application of four-coupling aperture. The antenna geometry is composed of a radiating rectangular ring vertically jointed to the four coupling apertures of an identical widthwise d.e., two apertures stacked on top and others two underneath) to achieve the symmetrical beam. The radiating rectangular ring is excited by a linearly probe. In the analysis, the appropriate antenna parameters are investigated by using the electromagnetic microwave simulator. It is found that this antenna propagates the WLAN frequency band of 2.4-2.5 GHz with the magnitude of Snlower than -10 dB. The simulated half-power beamwidths in both E-and H-planes are equal to 53°, 54° and 55° at 2.4 GHz, 2.45 GHz and 2.5 GHz, respectively. The maximum gain of 6.42 dBi is obtained over the frequency range. The simulated results will be reported and discussed in the paper.