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We propose a double-layer slotted waveguide array antenna having a wide bandwidth and a high efficiency for 120 GHz band. The diffusion bonding of laminated thin metal plates provides high precision even in very high millimeter bands such as 120 GHz. We design a 16×16-element array antenna having 90% peak aperture efficiency with 33.4 dBi at 126.5 GHz.
The fabrication technique called “pressure bonding” by applying a pressing at ambient temperature which has very high mass-productivity is supposed to realize a 20×20 elements double-layer waveguide slot array. Since the electric contact can not be realized at all locations, an alternating-phase fed array is adopted in this study. A partially-corporate feeding circuit installed in the bottom layer...
We design and fabricate a double-layer slotted waveguide array antenna having a wide bandwidth and a high efficiency for 120 GHz band and 350 GHz band using diffusion bonding of laminated thin metal plates. The fabricated 120GHz-band antennas are measured in two types of systems to examine the performance. The firstly fabricated antenna shows about 65% efficiency with 31.5 dBi gain around the design...
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