具有5-6GHz拒斥頻帶特性的非對稱超寬頻天線之設計

Design of a Asymmetrical Ultra-wide band Antenna With 5-6GHz Band-Notched Characteristics

袁敏事(Min-Shih Yuan) ； 傅仰德(Yang-Der Fu)

《中華技術學院學報》 40期 (2009/06) Pp. 455-463

https://doi.org/10.7095/JCIT.200906.0455

摘要

本文中設計一款具有5-6GHz拒斥頻帶特性的非對稱超寬頻天線，此天線是製作在FR4介質基板上。為了避免干擾WLAN的5~6GHz之頻段，類似半橢圓形接地面上挖出2個半圓形槽口。FR4基板的上層有一非對稱矩形貼片，中間有一橢圓貼片，外來高頻信號源經由微帶線饋入至橢圓貼片上，然後再耦合至外層非對稱矩形貼片上，產生UWB頻寬輻射場型。
本文中設計一款具有5-6GHz拒斥頻帶特性的非對稱超寬頻天線，此天線是製作在FR4介質基板上。為了避免干擾WLAN的5~6GHz之頻段，類似半橢圓形接地面上挖出2個半圓形槽口。FR4基板的上層有一非對稱矩形貼片，中間有一橢圓貼片，外來高頻信號源經由微帶線饋入至橢圓貼片上，然後再耦合至外層非對稱矩形貼片上，產生UWB頻寬輻射場型。
經由實體製作及量測後，得知本款天線在VSWR=2時阻抗頻寬是2.79GHz至12.93GHz，頻帶寬是129%，最大增益是6.64dBi，拒斥頻帶是4.8GHz至6.23GHz。本文中之天線能滿足不干擾5-6GHz無線區域網路的超寬頻系統之需求。

關鍵字

超寬頻天線 ； 微帶線饋送，拒斥頻帶

並列摘要

A compact ultra-wide band antenna with 5-6GHz band-notched characteristics is designed. This antenna is built on FR4 substrate. For avoiding the interference on 5-6GHz band of WLAN, a quasi semi-ellipse with two semi-circles are embedded in ground plane of FR4. A asymmetrical rectangular patch with a central ellipse patch are made on the top layer of FR4 and feed by a microstrip line.
The prototype are fabricated and measured. The input impedance bandwidth is 129%, and frequency is from 2.79GHz to 12.93GHz for VSWR=2.. The antenna peak gain is 6.64dBi. WLAN band-notched is 4.8~6.23 GHz. This antenna can be used in the UWB systems and cannot interference the 5-6GHZ WLAN systems.

並列關鍵字

UWB antenna ； Microstrip feed line ； Band-notched