A SIW Cavity-Fed Millimeter-Wave Dielectric Resonator Filtenna Array

In this paper, a substrate integrated waveguide (SIW) cavity-fed dielectric resonator (DR) filtenna array for millimeter-wave applications is proposed. The SIW cavity operating at TE
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mode has two functions: the first-stage resonator for the filtering response and four-way dividing realized by the mode power allocation and coupling coefficient. Four DRs operating in TE$^{y}_{111}$ mode are located on the top of SIW cavity. They not only act as radiators to form a 2×2 array, but also can be regarded as the second-stage resonator for the filtering response. Simulated results show that the proposed DR filtenna array possesses 3.2% fractional bandwidth, 12.6 dBi peak gain and good filtering performance.