摘要(英) |
Abstract
In the thesis, the design of series-fed circularly polarized aperture-coupled antenna array for millimeter-wave applications is proposed to provide the 5th generation wireless systems. The proposed antenna is fed by the aperture coupling method. The transmission line and the antenna are designed in opposite sides of the ground plane, so that the influence of the transmission line radiation on the pattern can be reduced in the millimeter wave band. The antenna uses a rectangular patch antenna, and the aperture also participates in radiation. The C-shaped aperture is added with an additional slot in the aperture shape, so that the antenna can produce circular polarization when the physical size of the antenna is different in length and width. In addition, this aperture design can also reduce the antenna Backward (negative Z direction) radiation to avoid waste of energy. This paper uses the RO4003 high-frequency two-layer board process provided by the National Chip Implementation Center.
The measured impedance bandwidth of the 28 GHz single circularly polarized aperture-coupled antenna is 21 %, the 3-dB axial ratio bandwidth is 5.9 %, the gain is 2.3 dBic, and the simulated front-to-back ratio is 13 dB. The measured impedance bandwidth of the 28 GHz series-fed four-elements circularly polarized aperture-coupled antenna array is 8.4 %, the 3-dB axial ratio bandwidth is 16.6 %, the gain is 8.9 dBic, and the simulated front-to-back ratio is 16 dB. |
參考文獻 |
參考文獻
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