220-320 GHz Hemispherical Lens Antennas Using Digital Light Processed Photopolymers
220-320 GHz Hemispherical Lens Antennas Using Digital Light Processed Photopolymers
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DOI：
10.1109/access.2019.2893230
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发表时间：
2019-01-01
期刊：
影响因子：
3.9
通讯作者：
Somjit, Nutapong
中科院分区：
文献类型：
--
作者：
Chudpooti, Nonchanutt;Duangrit, Nattapong;Somjit, Nutapong
本文介绍了一种220-320 GHz的半球形透镜天线的制作使用光聚合物为基础的增材制造和直接馈电的标准WR-3矩形波导没有任何额外的波导延长。微加工过程是基于数字光处理快速原型，使用Monocure 3DR 3582 C树脂基光固化聚合物。这提供了各种关键优势，包括易于天线制造、制造速度以及由于其快速制造能力而带来的成本效益。即使发现光聚合物在320 GHz下具有0.034的损耗角正切，全聚合物透镜天线仍然实现37%的分数带宽，覆盖整个220-320-GHz WR-3波导频带，在整个频带上在0度处测量的增益为约16 dBi。从220到320 GHz，在大约12度的半功率波束宽度下实现了优于14 dB的测量回波损耗，该半功率波束宽度在整个WR-3频带上相对恒定。
This paper presents a 220-320-GHz hemispherical lens antenna fabricated using photopolymer-based additive manufacture and directly fed by the standard WR-3 rectangular waveguide without any additional waveguide extension. The microfabrication process is based on digital light processing rapid prototyping using the Monocure 3DR3582C resin-based photocurable polymer. This gives various key advantages, including ease of antenna fabrication, manufacturing speed, and cost-effectiveness due to its rapid fabrication capability. Even though the photopolymer is found to have a loss tangent of 0.034 at 320 GHz, the all-polymer lens antennas still achieve a fractional bandwidth of 37%, covering the whole 220-320-GHz WR-3 waveguide band with a measured gain of approximately 16 dBi at 0 degrees over the whole band. A measured return loss of better than 14 dB is achieved from 220 to 320 GHz with a half-power beamwidth of approximately 12 degrees, which is relatively constant over the whole WR-3 band.