基于基片集成波導(dǎo)技術(shù)的超寬帶陷波天線的研究與設(shè)計
[Abstract]:Ultra-wideband (UWB) antenna is an antenna with an absolute bandwidth of more than 500MHz and a relative bandwidth of more than 20% between 3.1-10.6GHz. Since UWB technology was opened from military technology to civilian technology, it has been widely used in short-range wireless communication systems and microwave imaging technology. In this paper, the UWB antenna used in microwave imaging technology is studied. High directivity, high gain and low loss are the most important targets of antenna design for microwave imaging. The UWB antenna based on substrate integrated waveguide technology has low profile, low loss and high directivity. High gain and easy to integrate with other planar circuits and systems. Firstly, the realization method and design rules of the substrate integrated waveguide are introduced, and the transmission and scattering characteristics of the substrate integrated waveguide are studied and analyzed. Then, the conversion structure of substrate integrated waveguide and microstrip and the conversion structure of substrate integrated waveguide and grounded coplanar waveguide are studied and designed. Based on the characteristics of the substrate integrated waveguide with low loss and the high directivity of the waveguide slot antenna, the ultra-wideband antenna used in microwave imaging is designed. The working frequency range of the antenna is 4.04-10.64 GHz, and the relative bandwidth is 90 GHz. The pattern of E plane and H plane is consistent in the whole frequency band and has strong directivity. On this basis, the notch in WLAN (5.725-5.825GHz) band is realized by loading an open ring resonator as a parasitic element. Finally, an antenna impedance matching method based on substrate integrated waveguide technology is proposed. Combined with microwave transmission line theory, the equivalent model and analytical design method of matching structure are proposed. The impedance bandwidth of matching structure is increased by 15.3than that before loading.
【學(xué)位授予單位】:哈爾濱工程大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN822.8
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