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This paper presents a new concept for the Doppler sensor for true ground speed measurement. The basic principle is based on a membrane supported double folded slot antenna operating at 77 GHz with a bidirectional radiation characteristic and a Schottky diode for signal mixing and Doppler frequency shift extraction. The sensor was fabricated using silicon micromachining. A dedicated setup was used...
Scattering scanning near field microscopy is capable of measuring the response of a material to incident infrared light with a resolution determined by the tip radius of the antenna. We present new methods and results here, in which broad band and ultrafast sources are used to extend this technique into the time and frequency domains.
The design of a slot coupled microstrip patch antenna with four parasitic elements for the 77 GHz frequency range is presented. Full wave electromagnetic simulations were used for antenna modeling and optimization. The antenna was fabricated using Ferro A6-M Low Temperature Co-fired Ceramic technology. The “on wafer” measurements showed a central operating frequency of 78 GHz with reflection losses...
The paper deals with the radiation characteristic scanning of a ferrite supported resonating CPW antenna based on CRLH (Composite Right/Left-Handed) transmission lines. The scanning effect is obtained by magnetically polarizing the ferrite substrate with a magnetic biasing field which varies between 0 T and 0.16 T. Data obtained by simulation with a suitable microwave software indicate an azimuthally...
In recent years, there is an increased interest in the use of telecommunications systems operating at V-band frequencies for both military and civil applications. The high atmospheric absorption of microwave signals at 60 GHz is well suited for applications, such as secure communications and wireless local area networks WLAN, where propagation over significant distances is not desirable. Monolithic...
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