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We present an experimental demonstration of three-dimensional terahertz radar based on multi-directional leaky-wave scanning. The radar consists of a leaky-wave antenna that allows for one-dimensional beam steering by sweeping frequency around 300 GHz. The 3D positions of objects placed in front of the antenna can be reconstructed by synthesizing radar signals acquired at various azimuthal angles...
We demonstrate a short-range terahertz radar using a leaky-wave antenna (LWA). The prototyped antenna can form a directional beam with a 3dB width of 4° steerable over 38° across the broadside by sweeping the frequency from 235 GHz to 325 GHz. With the broadband beam steering capability, we can locate a small target placed in front of the LWA by analyzing the reflection spectrum obtainable from a...
We measured the DC and RF characteristics of InP-based 75-nm-gate In0.52Al0.48As/In0.63Ga0.37As HEMTs with various drain-side recess lengths Lrd's at 300 and 16 K. The kink phenomenon was seen in the current-voltage (I–V) characteristics for all the measured HEMTs at 16 K. The peak cutoff frequency ƒT decreases with increasing Lrd both at 300 and 16 K. On the other hand, the maximum oscillation frequency...
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