Employing irises and septums to excite the centreline longitudinal slot antennas

摘要

Abstract A suitable method is introduced to excite the centreline longitudinal slot antennas. For each slot, an iris and a rectangular septum are employed at the opposite sides of the slot such that they have offset from the waveguide centreline. It is shown that to form a high performance slotted array antenna consists of the centreline longitudinal antennas, employing antenna elements where each of them is excited only by an iris or a septum is not advisable. So, employing an iris and a septum all together is proposed to excite the centreline longitudinal slot antennas. This enables one to have a better control over the characteristics of the proposed slot antennas. The performed study indicates that the proposed slot antennas can be modelled as a shunt admittance on a transmission line. In order to demonstrate the effectiveness of the proposed slot antennas, a two‐by‐three planar array is designed, constructed and tested. The efficacy of the proposed slot antennas is verified by the simulation and the measurement results.