研究目的
Investigating the development of a low-profile, high-gain frequency beam steering antenna for sub-THz frequencies enabled by silicon micromachining.
研究成果
The antenna presented excels due to its high radiation efficiency, high gain, compact size, and large scanning range over a wide bandwidth. Its high performance, together with the batch production capabilities of silicon micromachining, makes this antenna a low cost enabling solution for several applications in the sub-THz region, including radar or beyond 5G communications.
研究不足
The back-lobe in the opposite direction from the main lobe due to the shorted termination of the PPW after the LWA, i.e., the energy which has not been radiated by the aperture is reflected and travels back in the waveguide in the opposite direction, resulting in radiation in an unwanted direction.
1：Experimental Design and Method Selection:
The design is based on a dielectric filled parallel-plate waveguide (PPW) leaky-wave antenna fed by a pillbox. The pillbox has an integrated parabolic reflector to generate a planar wave front.
2：Sample Selection and Data Sources:
Two antenna prototypes were fabricated in separate batches using the silicon on insulator (SOI)-wafer micromachining process.
3：List of Experimental Equipment and Materials:
The device is enabled by two extreme aspect ratio, 16 mm x 16 mm large perforated membranes, which are only 30 μm thick. The micromachined low-loss PPW structure was used.
4：Experimental Procedures and Operational Workflow:
The radiation patterns of two antenna prototypes were measured in the millimeter-wave antenna test facility CAMILL at IETR. The far-field measurement setup based on a classical direct illumination technique was used.
5：Data Analysis Methods:
The measured and simulated reflection coefficient, radiation efficiency, and gain were compared.
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