ID 原文 译文
56528 本文首先研究了3种具有不同耦合特性的SIR耦合对,分析了其差模DM (differential mode)相位移、耦合系数,以及共模CM (common mode)抑制水平. Three typesof coupled SIR pairs with different characteristics are investigated.
56529 通过适当选取SIR的阻抗比以及使用具有分散谐波分量的不同尺寸的SIR,其高次频得以远离基频,从而拓宽阻带. The differential-mode (DM) phase shifts,coupling coefficients, and common-mode (CM) levels of the three SIR pairs are then analyzed.
56530 同时,由于其DM和CM等效电路具有不同的谐振频率,其带内的共模噪声可以得到天然的抑制. The spuriousfrequencies of DM responses can be pushed far away from the fundamental frequency to widen the stopband byproperly choosing the impedance ratio of the SIR and using dissimilar SIRs with dispersed harmonics. Moreover,an inherent CM suppression can also be obtained because of the different resonant frequencies in DM and CMequivalent circuits.
56531 研究表明,电磁耦合对可在不增加电路面积的情况下获得小的耦合系数以利于窄带设计,电耦合对结构有利于高阶电路的互连,而磁耦合对具有最佳的CM抑制水平. Results also show that the electromagnetic coupling pair can contribute a weak couplingcoefficient for narrowband design without increasing the circuit size. The structure of the electric couplingpair is beneficial for high-order circuit interconnection. The magnetic coupling pair possesses the highest CMrejection. Moreover, the weak coupling properties are well-utilized for narrowband design.
56532 此外, 3类SIR对的弱耦合特性均可用于窄带设计.为了验证,本文采用所述3类SIR对设计了一款6阶平衡式带通滤波器,并在此基础上引入交叉耦合结构产生传输零点以提高通带选择性. For validation, a sixth?order balanced bandpass filter is designed using the three coupled SIR pairs, and a cross-coupling structure isfurther introduced to produce transmission zeros (TZs) and enhance the passband selectivity.
56533 其零点的产生机理通过传输路径的幅度及相位移分析进行了说明. The magnitude andphase delay of the DM transmission paths are analytically illustrated to explain the TZ production.
56534 最终,本文利用高温超导HTS (high-temperature superconducting)技术实现了所设计的具有交叉耦合结构的滤波器,以降低插入损耗. Eventually,the proposed balanced filter is implemented by a high-temperature superconducting technique to reduce theinsertion losses and is measured at the temperature of 77 K. The measured results show that the fractionalbandwidth of the passband is 1. 6% with less than 0. 37 dB in-band insertion loss.
56535 该电路在77 K温度下进行了测量,测试结果表明:通带的相对带宽FBW (fractional bandwidth)为1. 6%,带内插损约为0.37 d B,带内CM抑制度优于40 d B.其-60 dB带宽/-3 dB带宽的矩形系数小于1.45,同时-20 dB DM阻带达到约5倍f0d(f0d代表DM基波频率). The −60 dB bandwidth/−3 dBbandwidth rectangle ratio is less than 1. 45 while the in-band CM supp
56536 近年来,基于无线射频信号的定位技术迅速发展. Radio frequency-based localization techniques have undergone rapid development in recent years.
56537 然而,已有基于商用Wi-Fi设备的定位系统在实用性和准确性上存在明显局限. However, existing localization systems on commercial Wi-Fi devices are either impractical or inaccurate.