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A cross-slot-coupled dual-band circularly polarized rectangular dielectric resonator antenna (RDRA) with a small frequency ratio (1.23) based on compass navigation satellite system (CNSS) applications is designed, fabricated, and measured. The RDRA is excited to resonate at two pairs of near-degenerate orthogonal modes of TE111 and TE113, and a cross slot is introduced to simultaneously achieve dual-band...
This paper studies the feasibility of using China Mobile Multimedia Broadcasting (CMMB) signal for passive radar detection. The research focuses on the analysis of CMMB signal properties which include signal structure, spectrum analysis, target resolution, ambiguity function and reduction of side lobes. Since CMMB signal has wide bandwidth and high power in its coverage area, it has great advantages...
Vehicle traffic congestion has become a serious urban phenomenon in recent years, resulting in a large number of negative effects both on economy and ecology. Thus, finding a way to detect traffic congestion is a highly urgent problem to be solved by scientists and politicians throughout the world. One new promising approach is the usage of vehicular ad-hoc network (VANET). In this paper, we study...
A novel cylindrical conformal 2times2 microstrip antenna sub-array operating at millimeter-wave band is proposed.. A planar array element with an H-shaped coupling slot is investigated for its bandwidth feature and radiation performance. Compared with conventional microstrip antenna array, a planar 2times2 arrays is designed, and the results of comparison illustrates that the proposed design has less...
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