Study on Structure and Mass-Production of High-Efficiency Millimeter-Wave Slotted Waveguide Arrays

我们讨论了在单层主模波导天线中，由于槽板和波导之间的不完全接触而导致的电磁波泄漏导致的效率下降。我们已经证实，在26GHz频段，交流馈电比同相馈电具有更小的退化。我们估计，通过抑制反向倾斜的光栅瓣，效率约为60%。宽扼流圈由于结构的复杂性，并没有减少衰减。通过在辐射波导的两端安装两个馈电波导，实验证实了双光束开关。通过控制两个输入端口的功率比，也可以实现连续的光束转向。后壁波导馈电TEM天线在60GHz频段获得了60%的效率和27dBi。阶梯式同轴到径向适配器提高了径向线槽天线的大规模生产率5。我们开发了平面电路，利用槽耦合连接天线和射频电路。

We have discussed the followings on degradation of efficiency due to EM wave leakage coming from imperfect contact between the slotted plate and the waveguides in single-layer dominant-mode waveguide antennas.1. We have confirmed that the alternating-phase feed has less degradation than the co-phase feed at 26GHz band. We have estimated about 60% efficiency by suppressing grating lobes with beam-tilting in the backfire direction.2. Wide chokes installing the feed waveguides have not decreased the degradation due to its complexity in the structure.3. Two-beam switching has been confirmed experimentally by installing two feed wavguide s at the both ends of the radiating waveguides. Continuous beam steering is also possible by controlling the power ratio from the two input ports.4. Post-wall waveguide fed TEM antennas has obtained 60% efficiency with 27dBi at 60GHz band. Stepped coaxial-to-radial adapters has improved mass productivity in radial line slot antennas has5. We have developed planar circuits to connect antennas and RF circuits by using slot coupling.