本文選題：四頻帶帶阻　切入點(diǎn)：方形螺旋諧振器　出處：《華中師范大學(xué)》2017年碩士論文

【摘要】：微波濾波器作為無線通信領(lǐng)域不可或缺的無源器件,在射頻微波學(xué)研究領(lǐng)域掀起了一股新熱潮。全球微波互聯(lián)接入(Worldwide Interoperability for Microwave Access,WIMAX)、寬帶碼分多址(Wideband Code Division Multiple Access,WCDMA)、無線局域網(wǎng)絡(luò)(Wireless Local Area Networks,WLAN)、超寬帶(Ultra Wideband ,UWB)等各種無線通信協(xié)議的提出很大程度上加速了能應(yīng)用于各種通信系統(tǒng)的濾波器技術(shù)的研究。其中,多頻帶和超寬帶濾波器技術(shù)成為近年來微波濾波器的研究熱點(diǎn)。本文主要研究基于微帶形式多頻帶阻和超寬帶帶通濾波器的設(shè)計。第一種是基于階梯阻抗方形螺旋諧振器的四頻帶阻濾波器,通過分析具有階梯阻抗諧振特性的單元螺旋諧振器的電磁特性,最終將單元諧振結(jié)構(gòu)以不同的形式級聯(lián)而得出一種最優(yōu)的帶阻特性模型,仿真和實(shí)驗(yàn)結(jié)果相比其他文章的設(shè)計的突出點(diǎn)是增加了頻帶的數(shù)量,降低了諧振頻率,同時增大了各阻帶帶寬,在通帶插損小于0.5dB的同時提高了濾波器選擇性。第二種是一種基于開口環(huán)諧振器加載短路枝節(jié)的超寬帶帶通濾波器模型。該模型結(jié)構(gòu)采用經(jīng)典開口環(huán)的變形式作為主諧振器,并在其環(huán)口對稱加載短路枝節(jié),用奇偶模理論加以分析,實(shí)現(xiàn)超寬帶帶通濾波性能。該濾波器工作頻段為2.1 GHz到11.5 GHz,符合美國聯(lián)邦通信委員會(FCC)規(guī)定的超寬帶標(biāo)準(zhǔn)。此設(shè)計主要突出點(diǎn)在于結(jié)構(gòu)的小型化,工作帶寬的增大。
[Abstract]:Microwave filter is an indispensable passive device in the field of wireless communication. There has been a new upsurge in the field of RF microwave research. Various wireless communication protocols such as Worldwide Interoperability for Microwave access WIMAX, Wideband Code Division Multiple access, Wireless Local Area Networks WLAN, UWB Ultra Wideband UWWBs, etc., have been launched in the field of RF microwave research, among other wireless communication protocols, such as WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA, WCDMA and WCDMA. To a great extent, it accelerates the research of filter technology which can be used in various communication systems. Multi-band and ultra-wideband (UWB) filter technology has become a hot topic in microwave filters in recent years. This paper mainly studies the design of multi-band and ultra-wideband bandpass filters based on microstrip form. The first one is based on step impedance square snail. A four-band resistive filter for a rotary resonator, By analyzing the electromagnetic characteristics of the unit helical resonator with step impedance resonance, an optimal band-stop characteristic model is obtained by cascading the resonant structure in different forms. The outstanding points of the simulation and experimental results are that the number of frequency bands is increased, the resonant frequency is reduced, and the stopband bandwidth is increased. The filter selectivity is improved when the passband insertion loss is less than 0.5dB. The second is an ultra-wideband band-pass filter model based on open-loop resonator loading short circuit branch. The model structure adopts the variable form of classical open loop as the main resonator. The short section is symmetrically loaded at the ring mouth and analyzed by the theory of even and odd modes. The performance of UWB bandpass filter is realized. The frequency range of the filter is from 2.1 GHz to 11.5 GHz, which conforms to the UWB standard stipulated by the Federal Communications Commission. The main focus of this design is the miniaturization of the structure and the increase of the bandwidth.
【學(xué)位授予單位】：華中師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN713

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本文編號：1674594