| Summary: | 碩士 === 明新科技大學 === 電機工程系碩士班 === 104 === Coplanar slot antennas with three different shapes of radiator, comb, flag and polygon are designed in this thesis. Changing the element of comb radiator, the suitable size parameters are obtained from simulation. The simulated results are used to produce containing WLAN and LTE frequency bands antenna. Changing ground area of coplanar flag type radiator slot antenna is used to shift the impedance bandwidth to lower frequency. It can also be used to produce containing WLAN and LTE frequency bands antenna. Changing the bevel of polygonal radiator is used to get better size parameters. It can also be used to produce containing WLAN and LTE frequency bands antenna.
In this thesis, the glass fiber (FR4) substrate is adopted to fabricate the antenna and IE3D electromagnetic simulation software is used for analyzing the designed antenna. The fabricated comb-radiator slot antenna can be applied to 1.8 / 2.4 / 2.6 / 3.6 GHz bands. The fabricated flag-radiator slot antenna can be applied to 0.7/0.9/1.8/2.4/2.6/3.6 GHz bands. The fabricated polygon-radiator slot antenna can be applied to 1.8 / 2.4 / 2.6 / 3.6 / 4.9 / 5 / 5.1 / 5.8 / 5.9 GHz bands. The obtained polygonal radiator coplanar slot antenna which peak gains are 2.31dBi, 3.76 dBi, 3 dBi, 3.31 dBi, 3.03 dBi, 3.04 dBi, 4.21 dBi, and 4.37 dBi at 1.8 GHz, 2.4 GHz, 2.6 GHz, 3.6 GHz, 4.9 GHz, 5 GHz, 5.8 GHz, and 5.9 GHz, respectively.
Keywords: Long term evolution, Coplanar waveguide antenna, Comb-type radiator, Flag-type radiator, Polygonal radiator
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