基于槽線的小型化微波器件研究
[Abstract]:With the increasing miniaturization of personal communication terminals, reducing circuit size has become an important requirement for the design of wireless front-end microwave devices. The miniaturization technology of slot transmission line structure directly integrated in ground plane is studied and developed. It can make full use of the three-dimensional space of the circuit and meet the demand of miniaturization and high performance development of microwave device technology. In this paper, a variety of novel slot structures are proposed, the physical mechanism of miniaturization is explained, and a variety of microwave devices with both small size and high performance are realized by using these slot line structures. The main research contents of this paper are as follows: 1. The application of slot line in signal interference filter is studied. A signal interference band-stop filter based on slot structure is proposed. Compared with the traditional microstrip filter, the slot structure can achieve higher characteristic impedance under the condition of equal impedance ratio. In order to verify this conclusion, the signal interference band-stop filters with microstrip structure and slot structure are designed respectively. The simulation results of the two kinds of filters show that the performance of the slotted filter has more advantages. 2. The capacitive loading technique of closed slot structure is studied. The lumped circuit model is developed based on the equivalent transmission line model. It is found that capacitive loaded closed slot line can greatly reduce the resonant frequency of the slot and raise the Q value of the slot effectively. Based on these two characteristics of capacitive loading closed slot, the solution of selective enhancement of bandstop filter and slot antenna size compression can be obtained. In this paper, a capacitive loaded U-slot ground structure (DGS) model with strong selectivity is proposed, and a capacitive loaded slot antenna structure model is proposed, which can work at a lower resonant frequency. The miniaturization technology of multilayer microstrip transition based on slot is studied. Based on the theory of filter and the structure of open slot, a wide band synthesis technique of open slot transition is proposed, which can reduce the length of slot in transition by half and realize the filtering of multilayer microstrip transition, which can effectively improve the comprehensive performance of transition. At the same time, an open slot line loaded by intersecting fingers is proposed, which can further reduce the size of the multilayer transition circuit. 4. 4. The cooperative design technology of multi-layer differential filter and differential antenna is studied. The differential fed patch antenna is regarded as the last order resonator of the filter. The design method of the differential filter antenna is proposed to realize the filtering of the antenna response and the direct interconnection between the differential antenna and the back-end differential circuit.
【學(xué)位授予單位】:浙江理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TN713;TN822
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