Title :
High-resolution transmission-type (TT) dispersive delay structure (DDS) based on reflection-type (RT) elements
Author :
Lianfeng Zou ; Caloz, C.
Author_Institution :
Poly-Grames Res. Center, Ecole Polytech. de Montreal, Montreal, QC, Canada
Abstract :
It is shown that reflection-type (RT) dispersive delay structure (DDS) units are inherently superior to transmission-type (TT) DDS units in terms of analog signal processing resolution, since they provide a higher group delay swing. However, RT-DDS units suffer from the drawback of requiring a circulator to separate the input and output signals. In order to solve this issue, the paper presents a TT-DDS unit formed by combining two identical RT-DDS units through a hybrid coupler. The proposed TT-DDS unit is experimentally demonstrated in a two-unit DDS to provide a resolution enhancement of more than one order of magnitude compared to its purely TT-DDS counterpart.
Keywords :
analogue processing circuits; signal processing; waveguide couplers; RT-DDS unit; TT-DDS unit; analog signal processing; dispersive delay structure; group delay swing; high-resolution transmission-type elements; hybrid coupler; reflection-type elements; Couplings; Delays; Insertion loss; Programmable logic arrays; Signal resolution; Time-frequency analysis; Dispersive delay structure (DDS); analog signal processing; group delay;
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848627
