RF-Input-Quasi-Reflectionless Filtering Dispersive-Delay Structures Based on Complementary-Diplexer Architectures

IF 4.5 1区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Maciej Jasinski;Adam Lamecki;Roberto Gómez-García;Michal Mrozowski
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Abstract

The theoretical design and practical development of a family of high-order bandpass filtering dispersive-delay structures (DDSs) with radiofrequency (RF)-input-quasi-absorptive capabilities are presented. They consist of RF complementary-diplexer-based circuits, in which the main channel is a reflective-type bandpass filtering DDS and the resistively terminated auxiliary channel exhibits a bandstop filtering response with a quasi-complementary frequency profile with regard to that of the main channel. In this manner, the out-of-band/non-transmitted RF-input-signal power echoed by the main channel is mostly dissipated by the loading resistor of the auxiliary channel. As a fundamental constituent circuit block arranged in in-series-cascaded configurations for high-order reflective-type bandpass filtering DDS realizations, a triplet coupled-resonator network with one frequency-dependent coupling (FDC) is used. Its transmission properties are nearly transferred to the total RF-input-quasi-absorptive bandpass filtering DDS, which preserves the patterned group-delay/phase-variation response of the main channel. The theoretical design method of the devised RF-input-quasi-reflectionless bandpass filtering DDSs is detailed and exemplified with fifth- and seventh-order synthesis examples. It is based on a two-step design process, as follows: 1) separate polynomial/coupling-matrix synthesis of the main and auxiliary channels for the desired bandpass filtering DDS specifications in transmission and the complementary bandstop filtering functionality, respectively, and 2) coupling-matrix optimization of the overall RF-input-quasi-absorptive bandpass filtering DDS. Furthermore, for experimental demonstration purposes, a 2-GHz microstrip prototype of the previously designed RF-input-quasi-reflectionless fifth-order filtering DDS that features a stepped-type group-delay response is manufactured and characterized.
基于互补双工器结构的射频输入准无反射滤波色散延迟结构
介绍了一种具有射频输入准吸收能力的高阶带通滤波色散延迟结构(dds)的理论设计和实际开发。它们由基于射频互补双工器的电路组成,其中主通道是反射型带通滤波DDS,电阻端接的辅助通道表现出带阻滤波响应,其频率分布与主通道的频率分布相似。这样,主通道反射的带外/未发射的射频输入信号功率大部分被辅助通道的负载电阻耗散。作为高阶反射型带通滤波DDS实现的串联级联配置的基本组成电路块,使用具有一个频率相关耦合(FDC)的三重态耦合谐振器网络。它的传输特性几乎转移到全rf输入准吸收带通滤波DDS,它保留了主信道的图像化群延迟/相位变化响应。详细介绍了所设计的射频输入准无反射带通滤波dss的理论设计方法,并通过五阶和七阶综合算例进行了举例说明。它基于两步设计过程:1)分别对传输中期望的带通滤波DDS规格和互补带阻滤波功能的主通道和辅助通道进行单独的多项式/耦合矩阵合成;2)对整个rf输入准吸收带通滤波DDS进行耦合矩阵优化。此外,为了实验演示目的,制作了先前设计的具有阶跃型群延迟响应的rf输入准无反射五阶滤波DDS的2 ghz微带原型并对其进行了表征。
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来源期刊
IEEE Transactions on Microwave Theory and Techniques
IEEE Transactions on Microwave Theory and Techniques 工程技术-工程:电子与电气
CiteScore
8.60
自引率
18.60%
发文量
486
审稿时长
6 months
期刊介绍: The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.
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