【摘要】：超寬帶（Ultra Wideband，UWB）技術是一種利用納秒至微秒級的窄脈沖傳輸數據的無載波通信技術。 隨著無線通訊的迅猛發(fā)展，市場對結構緊湊的超寬帶射頻端的需求也在不斷增加。如今，這些子系統(tǒng)通常工作在微波頻段，包括濾波器和功分器。這就促使微波設計師們不斷研究和發(fā)展超寬帶設計技術。本文以微帶-槽線耦合結構為基礎，結合濾波器以及功分器的綜合設計，并研究了與之相關的理論和技術，最終實現超寬帶濾波器和寬帶平衡功分器的設計。本文的主要研究內容如下： 首先，利用微帶-槽線耦合結構，實現濾波器的超寬帶特性。在此基礎上，通過在微帶線與槽線耦合處末端加上新型的環(huán)形負載提高了濾波器的選擇性，通過輸入輸出端微帶傳輸線的耦合，提高了通帶與帶外特性。 其次，在提出的超寬帶濾波器的基礎上，利用階躍阻抗諧振器的諧振特性，通過耦合到超寬帶濾波器，實現了具有5.8GHz陷波特性的超寬帶帶通濾波器。最終制作并測試了該具有陷波特性的超寬帶濾波器，測試結果符合設計要求。 最后，為了適應差分電路的要求，本文基于微帶-槽線耦合結構，設計出了具有共模信號抑制特性的寬帶平衡功率分配器。通過三個隔離電阻提高了輸出端口的隔離度，傳輸線折疊減小整個功分器的尺寸。對實物進行加工測試，，性能良好，驗證了設計方法的正確性。
[Abstract]:Ultra-wideband (Ultra Wideband,UWB) technology is a carrier-free communication technology that transmits data using nanosecond to microsecond narrow pulses. With the rapid development of wireless communication, the demand for compact UWB RF terminals is increasing. Today, these subsystems usually work in microwave frequencies, including filters and power dividers. This prompted microwave designers to continue to research and develop UWB design technology. Based on the coupling structure of microstrip and slot line, combined with the integrated design of filter and power divider, the theory and technology related to it are studied in this paper. Finally, the design of UWB filter and wideband balance splitter is realized. The main contents of this paper are as follows: firstly, the ultra-wideband (UWB) characteristics of the filter are realized by using the microstrip-slot coupling structure. On this basis, the selectivity of the filter is improved by adding a new ring load at the end of the coupling between microstrip line and slot line, and by coupling the microstrip transmission line in the input and output terminal, the passband and out-of-band characteristics are improved. Secondly, based on the proposed UWB filter, the UWB bandpass filter with 5.8GHz notch characteristics is realized by coupling the resonant characteristics of the step impedance resonator to the UWB filter. Finally, the UWB filter with notch characteristics is fabricated and tested, and the test results meet the design requirements. Finally, in order to meet the requirements of differential circuits, a wideband balanced power divider with common mode signal suppression characteristics is designed based on the microstrip-slot coupling structure. The isolation of the output port is improved by three isolation resistors, and the transmission line folding reduces the size of the power divider. The processing test is carried out, the performance is good, and the correctness of the design method is verified.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN817;TN925


本文編號：2429361