Study of High-Efficiency Planar Array Antennas using TEM Waveguides

为了应用于汽车告警雷达和无线局域网，我们制作了60 GHz频段的径向线缝隙天线模型，并利用径向波导制作了缝隙阵列。在60 GHz频段的模型上，我们使用厚接地板和硬质介质材料来保持整个天线孔径的高度恒定，从而获得了稳定工作的结果。为了与平面射频电路(如信号产生器)很好地匹配，我们提出了一种通过环形缝隙在径向波导中激发圆柱形横电磁波的新技术。我们还提出了一种由柱子组成的单层馈电波导来激发矩形平行平板波导中的平面横电磁波。通过密集地制造多个通孔并将它们金属化为柱子，可以很容易地制造出波导。利用40 GHz频段模型对平行板中的平面横电磁波激励进行了实验验证，制作了60 GHz频段的平行板缝隙阵列模型，其中平面横电磁波由NRD导轨激励。基于NRD GUIDE技术，我们还研制了一款用于无线局域网的60 GHz数字收发信机。可同时实现两台计算机之间的双向数据传输。

We have fabricated 60GHz-band models of radial line slot antennas, slot arrays using radial waveguides, in order to apply for car warning radar and wireless LAN.We have obtained stable opreration of the 60GHz-band models using a thick ground plane and hard dielectric material to keep the height of the waveguide constant all over the antenna aperture. We have proposed a novel technique to excite cylindrical TEM wave in radial waveguide through a ring slot in order to fit well with a planar RF circuit such as a signal generator.We have also proposed a single-layr feed waveguide consisting of posts to excite a plane TEM wave in a rectangular parallel plate waveguide. The waveguide can be easily fabricate by making many via holes densely and metalizing them as the posts. We have confirmend the plane TEM wave excitation in the parallel plates by experiment using a 40GHz-band model.We have fabricated a 60GHz-band model of parallel plate slot arrays, where a plane TEM wave is excited by a NRD guide. We have also developed a 60GHz digital transceiver for wireless LAN,based on the NRD guide techonology. Both-way date transmission between two compuerst can be achieved simultaneously.