小型化低剖面全向濾波天線設計
電子技術應用
王麗黎1,2,徐亞妮1,高智勇1,張衡1
1.西安理工大學 自動化與信息工程學院,陜西 西安 710048; 2.西安市無線光通信與網絡研究重點實驗室,陜西 西安 710048
摘要: 設計了一個小型化全向微帶濾波天線。天線由帶通濾波器和微帶天線組成,二者共用一個地平面以減小尺寸且采用縫隙耦合方式連接,帶通濾波器蝕刻在微帶貼片天線的饋線位置處,引入選頻濾波功能,在輸入饋線前端添加一個橫向矩形貼片使整個系統達到良好的阻抗匹配。與傳統的微帶天線相比,所設計的濾波天線在不改變尺寸大小的基礎上引入了選頻濾波功能,在通帶邊緣體現出較高的選擇性。仿真與測試結果表明,該濾波天線的阻抗帶寬為2.31 GHz~2.56 GHz,且通帶內增益平緩,平均增益約為2.1 dBi,在工作頻段內呈全向輻射特性。
中圖分類號:TN82 文獻標志碼:A DOI: 10.16157/j.issn.0258-7998.234361
中文引用格式: 王麗黎,徐亞妮,高智勇,等. 小型化低剖面全向濾波天線設計[J]. 電子技術應用,2024,50(2):88-92.
英文引用格式: Wang Lili,Xu Yani,Gao Zhiyong,et al. Miniaturized low-profile filtering omnidirectional antenna design[J]. Application of Electronic Technique,2024,50(2):88-92.
中文引用格式: 王麗黎,徐亞妮,高智勇,等. 小型化低剖面全向濾波天線設計[J]. 電子技術應用,2024,50(2):88-92.
英文引用格式: Wang Lili,Xu Yani,Gao Zhiyong,et al. Miniaturized low-profile filtering omnidirectional antenna design[J]. Application of Electronic Technique,2024,50(2):88-92.
Miniaturized low-profile filtering omnidirectional antenna design
Wang Lili1,2,Xu Yani1,Gao Zhiyong1,Zhang Heng1
1.School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China; 2.Xi’an Key Laboratory of Wireless Optical Communication and Network Research, Xi’an 710048, China
Abstract: A miniaturized omnidirectional microstrip filter antenna is designed. The antenna is composed of a bandpass filter and a microstrip antenna, which share a ground plane to reduce the size and are connected by gap coupling. The bandpass filter is etched at the feeder position of the microstrip patch antenna, and the frequency selection filter function is introduced. A transverse rectangular patch is added at the front end of the input feeder to achieve good impedance matching of the whole system. Compared with the traditional microstrip antenna, the designed filter antenna introduces the frequency selection filter function without changing the size, and shows high selectivity at the edge of the passband. The simulation and test results show that the impedance bandwidth of the filter antenna is 2.31 GHz~2.56 GHz, and the gain in the passband is flat, the average gain is about 2.1 dBi, and the filter antenna has omnidirectional radiation characteristics in the working frequency band.
Key words : filtering antenna;microstrip antenna;miniaturized;omnidirectional antenna;bandpass filter
引言
天線和濾波器是射頻前端電路的重要組成部分[1-2],用于發射或接收信號、選擇頻段和消除干擾,它們的性質決定了整個通信系統的性能。通常情況下,這兩個器件分別獨立設計,然后通過額外的傳輸線連接,這種方法不僅在整個頻率范圍內極易產生阻抗不完全匹配,導致天線輻射特性下降,同時還會占用額外的電路面積,使得整個電路系統尺寸過大。因此,有學者提出將濾波器與天線相結合,構成一個兼具天線輻射功能和濾波器選頻功能的濾波天線[3-5]模塊,與傳統的級聯設計相比較,濾波天線具有小型化、集成化和低輻射損耗等優點[6-8]。
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作者信息:
王麗黎1,2,徐亞妮1,高智勇1,張衡1
1.西安理工大學 自動化與信息工程學院,陜西 西安 710048; 2.西安市無線光通信與網絡研究重點實驗室,陜西 西安 710048
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