應用於多頻帶之低姿態手機微帶天線設計

A low-profiled Planar Antenna for multi-band Application of Mobile Handset

陳建男(Jian Nan Chen) ； 施順鵬(Shun-Peng Shih) ； 陳君瑋(Jyun-Wei Chen)

《2008資通技術管理與應用會議》 2008 (2008/12) Pp. 559-568

摘要

在本文章中，我們提出了一結構簡單、平面設計、在高頻具有良好的阻抗頻寬、與低姿態（天線突出高度低於操作頻率波長的0.04倍）的單極平面天線來做研究及探討，尤其低姿態的設計可使天線在手機機殼內所佔的空間相當的小。本文所提出之天線設計製作在一雙層FR4板上，天線輻射主體由下方嵌入一彎曲的槽縫，此槽縫將天線的結構分為兩共振路徑branch1與branch2[4]，再由正下方饋入50Ω金屬微帶線，如此設計可共振出多頻帶，且利用下層接地金屬面與上層branch1之間的電磁耦合效應調整阻抗匹配，此方式可有效的增加頻寬，使其可操作於GSM-900、DCS-1800、PCS-1900、UMTS、WiMAX等行動通訊多頻帶。詳細的結構設計與實驗討論如下所述。

關鍵字

低剖面 ； 單極平面天線 ； 槽縫 ； 多頻帶

並列摘要

In this paper, we proposed a planar monopole antenna with simple structure, planar design, at high frequency has good impedance bandwidth, and low profile (antenna height less than 0.04 times the operating wavelength in the free space) for research and the discussion. Especially, the low profiled design can save the space of the antenna occupies in the mobile handset. The proposed antenna design by manufacturing on a double-layer FR4 board, The antenna is mainly composed of a rectangular radiating patch with a meandered slit. Due to the slit branch1 and branch2 are constructed, and the 50Ω microstrip line feed at the bottom edge of the radiate pattern. By the design can resonat multi-band. We can employ coupling between ground plane and branch1 to increase the bandwidth. The resulting antenna is able to operate in the GSM, DCS, PCS, UMTS and WiMAX bands. Details of the proposed design and obtained experimental results are as follows.

並列關鍵字

low-profile ； planar monopole antenna ； slit ； multi-band