本研究探討無人機通訊之天線設計與應用情境下的輻射特性，並且選用1.1~1.5GHz作為工作頻段，有助於無人機進行長距通訊的特性。本研究縮小天線整體尺寸，並且利用無人機的表面特性，與天線的特性相匹配來增加天線的特性與能力，做為系統提升的依據。
本論文先是討論了多種天線種類，試圖找出最能符合高頻寬、高增益之潛力天線，並且加上UAV載具之大型地平面，能夠對提高增益有顯著效果，最終選出了螺旋天線與雙極天線最更加深入討論。
螺旋天線本身就具有高頻寬特性，再加上大型地平面之後，增益更是有顯著的提升，並且頻寬也沒有受到影響，因此非常適合拿來當作UAV通訊使用之天線，但其最大缺點為體積過大，在本論文中，將原本對數型式之螺旋天線，修改成為阿基米德型式之螺旋天線，成功大大縮小了天線之尺寸，不過相對於雙極天線，尺寸還是偏大。
雙極天線本身擁有較高的頻寬，並且加上地平面之後，有助於提高增益，本身尺寸也較小，比起螺旋天線，更適合用於UAV之通訊，本論文更增加了H-slots使雙極天線尺寸更加縮小，使此天線擁有高頻寬、高增益、小尺寸，三大優點於一身。

This paper discusses the radiation characteristics of the antenna design and application of unmanned aircraft communication, and chooses 1.1~1.5GHz as the working frequency band, which is suitable for long-distance communication. This study reduces the overall dimension of the antenna, and uses the surface characteristics of the UAV to match the characteristics impedance of the antenna in order to increase the performance of the antenna.
This paper first discussed a variety of antenna types, trying to find the most suitable for high-bandwidth, high-gain potential antenna, and mount on the UAV's large ground plane, can have a significant effect on increasing the gain, and finally selected spiral antennas and dipole antennas.
The spiral antenna has the characteristics of high frequency bandwidth, after adding a large ground plane, the gain is significantly improved, and the bandwidth is not affected, so it is very suitable for use as an antenna for UAV communication, but its largest disadvantage is the dimension of itself. In this paper, the original log-spiral antenna is modified into an Archimedean spiral antenna, which has successfully reduced the dimension of the antenna, but compared to the dipole antenna, the dimension is still too large.
The dipole antenna has a higher bandwidth, and after mounted on a ground plane, it helps to increase the gain, and its dimension is also reduced. Compared with the spiral antenna, it is more suitable for UAV communication. This paper adds H- Slots make the dimension of the dipole antenna smaller, so that the antenna has the three advantages of high frequency bandwidth, high gain, and small dimension.

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