Interfaces between a coaxial structure and a post-wall waveguide are proposed as the essential components for cost-effective millimeter-wave modules. PTFE substrate is selected in terms of loss and manufacturability. The reflection and the transmission characteristics are investigated. The short-stepped and the short-taper-stepped feeding structures provide 14.7% and 13.2% bandwidths for the re...

This invited ·contribution provides insights for implementation of millimeter-wave and terahertz wireless systems on a chip (MTWSOC). We present an overview of important software and simulation tools and key layout issues and design rules for millimeter-wave (mmWave) circuits. An example of a recently fabricated 0.18,um CMOS integrated circuit by the Wireless Networking and Communications Group...

The millimeter-wave radar observations of wintertime thunderstorms are compared with the Cband radar observations at Mikuni, Fukui. The difference between their echo intensities and the correlation between differential radial velocity and disturbance index are discussed in light of prediction of lightning discharges. The comparatively lower values of the millimeter-wave radar for the intense ec...

In the realm of materials science, terahertz frequency measurement systems provide significant utility in the characterization of material properties. With support primarily from the U.S. Army National Ground Intelligence Center (NGIC), Submillimeter Technology Laboratory (STL) researchers have been advancing the field of terahertz technology to the application of modeling millimeter-wave and m...

To maintain the Ad Hoc network connectivity and to perform efficient energy communication between several mobile stations (MS), optimized routing algorithms need accurate short-range localization or/and positioning data. Due to indoor propagation, multipath may dramatically increase location budget error and ask for innovative solutions allowing accurate time of flight measurement. An original ...

The millimeter-wave spectrum from 30 to 300 GHzfeatures large available bandwidth and small wavelengths which can be leveraged for high-throughput wireless communications and high-resolution radar sensors. Key mass-market millimeter-wave applications include local­ area networks at 60 GHz which can support multiple gigabit-per-second transfer rates, vehicular radars at 76-81 GHzfor collision av...

Millimeter wave (MW) is an electromagnetic wave with a wavelength between 1 and 10 mm and a frequency of 30-300 GHz that causes multiple biological effects and has been used as a major component in physiotherapies for the clinical treatment of various types of diseases including cancers. However, the precise molecular mechanism of the anticancer a...

Metamaterials are a new class of ordered composites that exhibit exceptional electromagnetic properties not readily observed in nature. In particular, artificial materials with both negative permittivity and permeability have attracted widespread interest in recent years. These composites are constructed from an array of metallic in dielectric and magnetic substrates and exhibit unusual electro...

Millimeter wave band is still under exploited compared to the microwave band and it can be a potential frequency band for resolving the spectrum congestion. Therefore, millimeter-wave networks are undergoing intensive development to meet the necessity for high speed wireless data transmission. However, millimeter-wave band is largely affected by attenuation due to rain. While calculating link b...