Phase and group propagation in metamaterial-based microwave components has always been intellectually challenging for students and engineers new to the area of periodic structures and metamaterials. This paper aims in...Phase and group propagation in metamaterial-based microwave components has always been intellectually challenging for students and engineers new to the area of periodic structures and metamaterials. This paper aims in tackling this important topic by studying the wave propagation in a metamaterial-based microwave device. Hence, the contribution of this paper is twofold. First, design of a novel metamaterial ring hybrid (or rate-race) is presented which has a large rejection band so that the second and third harmonics are effectively suppressed. Second, the electromagnetic phase and the group propagation in the ring hybrid are investigated by numerically exciting the input ports with band-limited Gaussian pulses and then finding their responses at various locations in the device.展开更多
应用RACE-PCR技术,克隆了全长2743 bp的SD-大白鼠催乳素受体基因(gPRLR)cDNA。序列分析表明,cD-NA含421 bp 5′-UTR、1357 bp编码区和218 bp 3′-UTR。比对奶牛催乳素受体基因并将前217 bp看作第1外显子,则gem基因可划分为13个外显子。...应用RACE-PCR技术,克隆了全长2743 bp的SD-大白鼠催乳素受体基因(gPRLR)cDNA。序列分析表明,cD-NA含421 bp 5′-UTR、1357 bp编码区和218 bp 3′-UTR。比对奶牛催乳素受体基因并将前217 bp看作第1外显子,则gem基因可划分为13个外显子。推导的蛋白序列含763个氨基酸,与奶牛、鸽及猪PRLR的同源性较高,其N末端含23个氨基酸的信号肽,成熟蛋白含789个氨基酸。gPRLR mRNA在成年鼠睾丸、输精管、卵巢、输卵管、肾、大肠、小肠、脾组织中均有表达。展开更多
文摘Phase and group propagation in metamaterial-based microwave components has always been intellectually challenging for students and engineers new to the area of periodic structures and metamaterials. This paper aims in tackling this important topic by studying the wave propagation in a metamaterial-based microwave device. Hence, the contribution of this paper is twofold. First, design of a novel metamaterial ring hybrid (or rate-race) is presented which has a large rejection band so that the second and third harmonics are effectively suppressed. Second, the electromagnetic phase and the group propagation in the ring hybrid are investigated by numerically exciting the input ports with band-limited Gaussian pulses and then finding their responses at various locations in the device.
文摘应用RACE-PCR技术,克隆了全长2743 bp的SD-大白鼠催乳素受体基因(gPRLR)cDNA。序列分析表明,cD-NA含421 bp 5′-UTR、1357 bp编码区和218 bp 3′-UTR。比对奶牛催乳素受体基因并将前217 bp看作第1外显子,则gem基因可划分为13个外显子。推导的蛋白序列含763个氨基酸,与奶牛、鸽及猪PRLR的同源性较高,其N末端含23个氨基酸的信号肽,成熟蛋白含789个氨基酸。gPRLR mRNA在成年鼠睾丸、输精管、卵巢、输卵管、肾、大肠、小肠、脾组织中均有表达。
