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Millimeter wave have many advantages compared with microwave, a millimeter wave radar system based on stepped frequency pulse signal can be used to near-field imaging. The wave number domain algorithm is used to mechanical scanning data that achieved by a two-dimensional (2-D) planar aperture with the radar system to reconstruct three-dimensional (3-D) reflectivity image. Results show the efficiency...
A millimeter wave circular polarized microstrip antenna based on linear polarized subarrays is presented in this paper. The subarrays provide orthogonal vertical linear polarized component and horizontal linear polarized component. LHCP and RHCP waves can be obtained by configuring amplitudes and phases of the feeds. This microstrip antenna has relatively simple feed structure. In this microstrip...
A millimeter-wave variable polarization monopulse frontend based on microstrip array antenna is presented in this paper. The front-end consists of four millimeter wave T/R modules and a microstrip antenna with four linear polarized subarrays. The polarization of far field electric field can be configured by amplitudes and phases of the feeds. Besides the angle error of monopulse angle estimation,...
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