Internal Printed Monopole Antenna for LTE/UMTS /WLAN/WiMAX Multi-Network Operations for a Wireless USB Dongle Applications

應用於無線通用序列匯流排轉接裝置的內部印刷單極天線之LTE/UMTS/WLAN/WiMAX多網路頻段操作

鍾明桉(Chung, Ming-An) ； 古家豪(Ku, Chia-Hao) ； 周麗華(Chou, Li-Hua)

《明新學報》 43卷1期 (2017/02) Pp. 13-20

摘要

A planar meander-line monopole antenna was designed for wireless Universal Serial Bus (USB) dongle devices. The proposed antenna shows broad band characteristics and supports the LTE, UMTS, WLAN and WiMAX services. The proposed antenna consists of a meander shaped patch and an L-shaped open end stub. The antenna is fabricated on an FR4 substrate of permittivity of 4.4, thickness of 0.8 mm, loss tangent of 0.0245 and fed with 50- microstrip line. From the simulated and measured return losses, the 10 dB operating bands cover the LTE/UMTS/WLAN/WiMAX application bands. The designed antenna measures 12.5 (W) × 12.5 (L) × 0.8 (H) mm^3, which is suitable for compact USB dongles. The measured 2:1 bandwidths of the voltage standing wave ratio are operated between 1710 MHz to 2690 MHz for LTE/UMTS/WLAN/WiMAX bands. The measured peak gain is 3.78 dBi, and efficiency is higher than 77%. The radiation patterns are also nearly omni-directional. The antenna with the simple structure and good performances is suitable for applying in LTE/UMTS/WLAN/WiMAX systems of small size.

關鍵字

Monopole Antenna ； (USB) Dongle Application ； LTE ； UMTS ； WLAN ； WiMAX

並列摘要

本論文提出了平面彎折線單極天線設計的無線通用序列匯流排(USB)轉接器裝置之實務應用。該天線具有寬頻帶特性以及支持LTE、UMTS、WLAN與WiMAX服務。所提出的天線由曲折形狀的貼片和L形開口端短截線組成。該天線設計所使用的材料在介電常數為4.4，厚度為0.8 mm，損耗角正切為0.0245，饋入50 Ω微帶線的FR4基板上製造。根據模擬和測量的反射損耗在低於10 dB以下的工作頻段，確實有覆蓋於LTE/UMTS/WLAN/WiMAX的應用頻段。其天線大小尺寸為12.5（寬）× 12.5（長）× 0.8（高）mm^3，因此，適用於緊湊型的無線通用序列匯流排轉接裝置中。對於，實際測量結果可以看出，在電壓駐波比為2：1的條件下，頻率的操作範圍在1710 MHz至2690 MHz之間，符合LTE/UMTS/WLAN/WiMAX頻帶之間之設計。並且也測試獲得天線的峰值增益為3.78 dBi，效率高於77％以及天線輻射圖也幾乎是全向性之特性。此設計具有簡單結構和良好性能的天線適用於小尺寸的LTE/UMTS/WLAN/WiMAX系統中。

並列關鍵字

單極天線 ； 無線通用序列匯流排轉接裝置 ； LTE ； UMTS ； WLAN ； WiMAX

參考文獻

Wireless USB Promoter Group [Online]. Retrieved from http://www.usb.org/developers/wusb/

Ojaroudi, N., Ojaroudi, M., & Ghadimi, N. (2013). Dual band-notched small monopole antenna with novel W-shaped conductor backed-plane and novel T-shaped slot for UWB applications. IET Microwaves Antennas & Propagation, 7(1), 8-14.

Gautam, A. K., Yadav, S., & Kanaujia, B. K. (2013). A CPW-fed compact UWB microstrip antenna. IEEE Antennas and Wireless Propagation Letters, 12, 151-154.

Rautela, R. S., & Vishwakarma, D. (2015). A ramp type planar monopole antenna for WLAN and WIMAX application. Microwave and Optical Technology Letters, 57(6), 1485-1487.

Park, Y. K., Kang, D., & Sung, Y. (2012). Compact folded triband monopole antenna for USB dongle applications. IEEE Antennas and Wireless Propagation Letters, 11, 228-231.