A W-band power divider realized by metallic gap waveguide technology with polarization conversion

A low loss power divider in W-band is realized by metallic Gap waveguide (GWG). The power in the horizontal polarized groove GWG is divided into two vertical polarized groove GWG branches in the same layer. The polarization difference between the two GWG structures is adjusted by the shorted metallic pins. The transmission loss is tiny, since the electromagnetic (EM) wave is forced to propagate in the air gap. Meanwhile, there is no electrical connection during the fabrication of this new transmission structure. This power divider realizes the polarization conversion and energy distribution in the same layer, making it a good candidate for W-band high performance antenna array with low-loss and single-layer feeding network. In addition, the out-of-phase characteristic between the two output ports is frequency independent, which is suitable for various applications.