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The Software PARIS Interferometric Receiver (SPIR) was conceived as a multiple beam-forming GNSS-Reflectometry receiver capable of implementing different signal processing strategies (clean-replica, interferometric, etc.) in order to demonstrate the synoptic capabilities for sea-surface altimetry using the interferometric GNSS-R technique. The instrument has been designed as a 16-channel very-high...
We demonstrate high frequency switching characteristics of TFETs based on the In0.9Ga0.1As/GaAs0.18Sb0.82 material system. These near broken-gap TFETs (NBTFETs) with 200nm channel length exhibit record drive current (ION) of 740μA/μm, intrinsic RF transconductance (GM) of 700μS/μm, and a cut-off frequency (FT) of 19GHz at VDS=0.5V. Numerical simulations calibrated to the experimental data are used...
To fulfill co-located dual-polarized directional radiation, a dual-port patch antenna is presented. Constructed on a microwave PCB, the patch element is a foursquare of two open slots. The designed antenna can radiate the patch antenna mode while fed by the coaxial line (port 1), and the folded dipole mode while fed by the coplanar stripe (port 2). The experimental results show that the operating...
We present a novel chip-level optical spectrometer in which the transmission characteristics of a 2-dimensional variable size hole array may be used for analyzing the spectral contents of an incident beam.
The paper studies the multipath characteristics of the wideband channels at 3.5 GHz in a typical outdoor urban environment. A channel measurement system for this frequency band was developed; Based on the measurement data, the channel modeling parameters including the tapped delay line models, the multipath distribution, the excess delay and the Ricean K-factor were extracted. Then by using the measured...
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