A Miniaturized Self-Matched Negative Group Delay Microwave Circuit

Negative group delay active topologies respectively dedicated to microwave frequencies and baseband signals

This paper proposes and describes in details the synthesis, design and implementation of two different active topologies exhibiting negative group delay (NGD) in different frequency bands. With the first of them, gain and NGD in microwave frequency band are simultaneously achieved; the basic cell consists in a field effect transistor (FET) cascaded with a shunt RLC series network. The second to...

Integration of RF passive components into semiconducting device through 3D capacitive coupling for application to fully-integrated MMIC

In this work, a 3D capacitive coupling structure employing periodic pattern was used for application to miniaturized on-chip passive components on MMIC (Monolithic Microwave Integrated Circuit). Unlike conventional periodic structure, the characteristic impedance of the 3D capacitive coupling structure was hardly dependent on frequency. Using the 3D capacitive coupling structure, RF passive com...

Negative Index Photonic Crystals Superlattices and Zero Phase Delay Lines"

An intense interest in negative index metamaterials (NIMs) [1-2] has been witnessed over the last years. Metal based NIMs [3-11] have been demonstrated at both microwave and infrared frequencies with a motivation mainly coming from the unusual physical properties and potential use in many technological applications [12-21]; however, they usually have large optical losses in their metallic compo...

A Miniaturized Water Vapor Profiling Radiometer for Network-based 3-D Measurements of the Tropospheric Water Vapor Field

Knowledge of the temporal and spatial distribution of water vapor and liquid water in the troposphere is fundamental for shortand medium-range prediction of precipitation and severe weather. Current measurements of these quantities in the troposphere are limited by optical extinction in clouds (lidar), in temporal resolution (radiosondes), in spatial resolution (GPS networks) and in spatial cov...

Broadband Microwave Negative Group Delay Transmission Line Phase Shifters