本論文提出可應用於的小尺寸單極耦合天線，放置在螢幕上緣，適用於窄邊框筆電，第一項設計為平面印刷天線搭配立體鐵件，使用材質為FR4玻璃纖維基板，其介電常數(εr*relativepermittivity)為4.4，損失正切(δ,loss tangent)為0.02，搭配高度2.5 mmSU304鐵件的耦合天線，使FR4玻璃纖維基板與SU304鐵件以90度進行銲接，尺寸大小為90*7*2.5 mm³，金屬板大小為300*200mm，並在頂端設置300*11之無金屬淨空區，本設計新增一條輻射路徑，透過組合兩個鄰近模態實現多路徑共振以覆蓋寬頻，並把其一輻射路徑做成立體結構進一步提升天線效率，第二項設計為延伸第一項設計並使用Qorvo RF switch晶片來進行切換，為了解晶片電容值改變對天線進行的影響，本實驗將使用簡易LC電路來實驗，藉由改變電容值的大小來切換低頻，使天線有效的頻寬落在需要使用的區間中。

This paper proposes a small-sized monopole coupled antenna applicable to the top of laptop screen, suitable for narrow bezel laptops. The first design involves a planar printed antenna combined with a three-dimensional iron component, using an FR4 glass fiber substrate with a relative permittivity (εr) of 4.4 and a loss tangent (δ) of 0.02. Coupled with a 2.5 mm high SU304 iron component, the FR4 glass fiber substrate and the SU304 iron component are soldered at a 90-degree angle. The dimensions are 90*7*2.5 mm³, A metal plate of size 300*200 mm is positioned, with a non-metallic clearance area of 300*11 at the top. This design introduces an additional radiation path, achieving wideband coverage by combining two adjacent modes to realize multipath resonance. One radiation path is turned into a three-dimensional structure to further enhance antenna efficiency. The second design extends the first one and incorporates a Qorvo RF switch chip for switching. To understand the impact of changing chip capacitance on the antenna, a simple LC circuit is employed for experimentation. By adjusting the capacitance, low -frequency band switching is achieved, allowing the antenna's effective bandwidth to switch to the required range.

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