《电气专业外文翻译--紧凑的高阶谐波抑制（适用于外文翻译+中英文对照）》-毕业论文设计（学术).doc

w TAIYUAN UNIVERSITY OF SCIENCE TECHNOLOGY 外文翻译 题目：紧凑的高阶谐波抑制 学 生 姓 名 _________ 学 号 200822050101___ 班 级 电气082201H __ 所属院（系）电子信息工程系_ 指 导 教 师 _________ 2012年6月9日 Compact Multi-harmonic harmonic Compact Multi-harmonic LTCC Bandpass Filter Using Parallel Short-Ended Coupled-Line Structure Xu-Guang Wang, Young Yun, and In-Ho Kang This paper presents a novel simple filter design method based on a parallel short-ended coupled-line structure with capacitive loading for size reduction and ultra-broad rejection of spurious passbands. In addition, the introduction of a cross-coupling capacitor into the miniaturized coupled-line can create a transmission zero at the second harmonic frequency for better frequency selectivity and attenuation level. The aperture compensation technique is also applied to achieve a strong coupling in the coupled-line section. The influence of using the connecting transmission line to cascade two identical one-stage filters is studied for the first time. Specifically, such a two-stage bandpass filter operating at 2.3 GHz with a fractional bandwidth of 10% was designed and realized with low-temperature co-fired ceramic technology for application in base stations that need high power handling capability. The measured and simulated results showed good agreement. Keywords: harmonic bandpass filter, LTCC., coupled-line, I. Introduction In recent years, compact, high-performance, and low-cost components for radio frequency (RF) applications have been the focus of a great deal of research and industrial pursuit with the explosive growth of modern wireless communication services. One promising method for many miniaturizing and packaging technologies is to use low-temperature cofired ceramic (LTCC) on account of its multilayer structure and high unloaded quality factor. The bandpass filter is an essential component in the RF front-end of communication systems. It passes the desired frequencies, rejects unwanted signals, and suppresse