Low Profile Triangle Slot Element Antenna for Array Applications

Single fed array antenna consisting of four triangle cavity backed slot element antennas is introduced in this paper. A radiating rectangular slot is opened on the upper surface of the unit antenna. A thin triangular substrate integrated waveguide (SIW) cavity is adopted. Moreover, grounded coplanar waveguide (GCPW) to excite TE120 modeis used. This element antenna reaches a well simulation gain of 5.8 dBi as well as low cross polarization level can be geted. The proposed unit antenna is designed 1x4 array antennas and use a compact feed network.Measurement results indicate that the array antenna achieves a high gain up to 10.7 dBi, this result reveals that this antenna retains well radiation property compared with conventional array antennas. Moreover, low-profile, convenient layout and compact structure are it's merits.