【摘要】：目前,通信系統(tǒng)正處于高速發(fā)展的狀態(tài),而濾波器是通信系統(tǒng)中的關(guān)鍵器件,其性能對(duì)通信系統(tǒng)有著非常重要的影響。如何快速研發(fā)小尺寸、高性能、低成本的濾波器對(duì)無線通信系統(tǒng)未來發(fā)展具有非常重要的實(shí)際意義。針對(duì)上述目標(biāo),本課題在介質(zhì)濾波器以及交指腔體濾波器方面進(jìn)行了深入的研究。通過運(yùn)用介質(zhì)材料和電容加載原理有效的減小了濾波器的體積。文中先對(duì)對(duì)介質(zhì)諧振器的相關(guān)基礎(chǔ)理論進(jìn)行論述,并且依據(jù)理論設(shè)計(jì)出一種雙頻帶通介質(zhì)腔體濾波器。該濾波器由相同材料的介質(zhì)腔體和矩形介質(zhì)諧振器組合而成,兩者連為一體,腔體內(nèi)部不需要傳統(tǒng)金屬腔體濾波器那樣的固定諧振器的裝置,在介質(zhì)腔體的所有外表面鍍上一層厚度很薄的金屬銀。然后借助電磁仿真軟件建立三維仿真模型,最后獲得符合設(shè)計(jì)指標(biāo)的仿真模型。然后,又提出兩種單塊的介質(zhì)波導(dǎo)濾波器的設(shè)計(jì)方案,濾波器是由介電常數(shù)εr =20.5的單塊陶瓷材料鑄造而成,通過使用介質(zhì)材料縮小了濾波器的體積。濾波器的所有外表面均鍍上一層金屬銀或者金屬化合物。波導(dǎo)諧振器通過引入調(diào)諧和耦合盲孔,可以對(duì)加工成實(shí)物的濾波器進(jìn)行微調(diào),保證了加工的成品率。通過采用交叉耦合的設(shè)計(jì)結(jié)構(gòu)增強(qiáng)了其帶外抑制能力。借助電磁仿真軟件建立三維仿真模型,通過優(yōu)化最后得到中心頻率f0=2.6GHz、通帶帶寬BW=100MHz的濾波器仿真模型。最后,介紹一款應(yīng)用于矢量網(wǎng)絡(luò)分析儀上的交指腔體濾波器的設(shè)計(jì)方案。它是由λ/4金屬諧振器交錯(cuò)形成,憑借著加載電容的引入使其尺寸得到減小。借助仿真軟件建立三維仿真模型,通過優(yōu)化最后得到了中心頻率f0=6.9GHz、通帶帶寬BW=1.3GHz的濾波器仿真模型。
[Abstract]:At present, the communication system is in a state of rapid development, and filter is the key device in the communication system, its performance has a very important impact on the communication system. How to develop small size, high performance and low cost filter quickly is of great practical significance for the future development of wireless communication system. In view of the above objectives, this paper has carried on the thorough research in the dielectric filter and the cross finger cavity filter. The volume of the filter is reduced effectively by using the dielectric material and the principle of capacitance loading. In this paper, the basic theory of dielectric resonator is discussed, and a dual-band pass dielectric cavity filter is designed according to the theory. The filter is composed of a dielectric cavity of the same material and a rectangular dielectric resonator, which are connected together. There is no need for a fixed resonator device such as a traditional metal cavity filter in the cavity. A thin layer of silver metal is coated on all external surfaces of the dielectric cavity. Then the three-dimensional simulation model is established with electromagnetic simulation software. Finally, the simulation model which accords with the design index is obtained. Then, two design schemes of single dielectric waveguide filter are proposed. The filter is made of a single ceramic material with dielectric constant 蔚 r = 20.5, and the volume of the filter is reduced by using dielectric material. All outer surfaces of the filter are coated with a layer of metal silver or metal compounds. By introducing tuning and coupling blind holes, the waveguide resonator can fine-tune the filter machined into the object to ensure the finished product rate. The out-of-band suppression ability is enhanced by adopting cross-coupling design structure. With the help of electromagnetic simulation software, the three-dimensional simulation model is established. Finally, the filter simulation model of center frequency f _ 0 鈮，

本文編號(hào)：2475074