摘 要:采用多系统接入平台(POI)实现多运营商多制式系统接入是当前主流的室内分布式系统方案之一。小型化 POI 设计的关键问题是谐振器及其组成的滤波器设计。文章提出了一种基于多模谐振技术的滤波器模块设计方案,具体为利用单个同轴谐振腔中前 N个谐振模式的激励和耦合,实现 N 阶的带通滤波器设计。相比相同阶数的传统滤波器,所提的方案需要的腔体数量明显降低,从而有效减少了所设计的滤波器体积。在单腔六模的情况下,仿真验证的滤波器体积为传统 6 阶滤波器的 22%,并且带外抑制达到 94 dB。
关键词:滤波器;POI;多模谐振
DOI:10.19850/j.cnki.2096-4706.2022.07.012
中图分类号:TN713 文献标识码:A 文章编号:2096-4706(2022)07-0046-04
Design on Miniaturized POI Component
LI Jingsheng1, RONG Rong1, OUYANG Zhaoan2
(1.Guangzhou GCI Science and Technology Co., Ltd., Guangzhou 510310, China; 2.Faculty of Science and Technology, University of Macau, Macau 519000, China)
Abstract: Using multi system access platform (POI) to realize multi operator and multi system access is one of the current mainstream indoor distributed system solutions. The key problem of miniaturized POI design is the design of resonator and its filter. This paper presents a design scheme of filter module based on multi-mode resonance technology, which realizes the design of N order band-pass filter by using the excitation and coupling of the first N resonant modes in a single coaxial cavity. Compared with the traditional filter with the same order, the number of cavities required by the proposed scheme is significantly reduced, which effectively reduces the volume of the designed filter. In the case of single cavity six mode, the filter volume verified by simulation is 22% of that of the traditional six order filter, and the out of band suppression reaches 94 dB.
Keywords: filter; POI; multi-mode resonance
参考文献:
[1] 董鑫.POI设备LTE扩容单元的原理和应用 [J].移动通信,2015,39(10):32-35.
[2] 李卓,王佳,柴跃林,等 . 铁塔公司室分多系统合路建设策略分析 [J]. 信息通信,2017(8):218-219.
[3] 李广伦,李凤花,臧军 .POI 共建 LTE 双路室分系统建设成本分析 [J]. 邮电设计技术,2015(1):45-49.
[4] 杨宋兵,赵国民 . 多系统接入平台(POI)的设计 [J]. 移动通信,2005,29(8):92-96.
[5] MACCHIARELLA G,TAMIAZZO S. Synthesis of starjunction multiplexers [J]. IEEE Transactions on Microwave Theory and Techniques,2010,58(12):3732-3741.
[6] PANARIELLO A,YU M,ERNST C. Ku-band high power dielectric resonator filters [J].IEEE Transactions on Microwave Theory and Techniques,2013,61(1):382-392.
[7] HU H,WU K L,CAMERON R J. Stepped circular waveguide dual-mode filters for broadband contiguous multiplexers [J].IEEE transactions on microwave theory and techniques,2013,61(1):139-145.
[8] YASSINI B,YU M. Ka-band dual-mode super $ Q $ filters and multiplexers [J].IEEE Transactions on Microwave Theory and Techniques,2015,63(10):3391-3397.
[9] COGOLLOS S,SOTO P,BORIA V E,et al. Efficient design of waveguide manifold multiplexers based on low-order EM distributed models [J].IEEE Transactions on Microwave Theory and Techniques,2015,63(8):2540-2549.
作者简介:李惊生(1963—),男,汉族,湖南涟源人,高级工程师,学士,毕业于四川大学无线电系无线电物理专业,研究方向:电波传播以及天馈技术;通讯作者:容荣(1979—),男,汉族,广西钦州人,高级工程师,硕士,毕业于华南理工大学通信与信息系统专业,研究方向:电波传播以及天馈技术;欧阳兆桉(1990—),男,汉族,广东广州人,研究助理,博士,毕业于澳门大学科技学院,研究方向:平衡滤波器设计。