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This letter introduces a wideband conformal log-periodic dipole array (LPDA) antenna array mounted on a foam cone for direction finding application. To miniaturize this conformal LPDA antenna array, the LPDA antenna with curvilinear dipoles is used. Simulated and measured results show the LPDA antenna with curvilinear dipoles has good radiation performances. Mounting on a ROHACELL foam cone, the LPDA...
A scheme for cheaply, easily, and accurately measuring the gains and radiation patterns of Wi-Fi-band antennas is presented. Considering the cost, size, and convenience, a high-gain microstrip Vivaldi antenna, based on anisotropic zero-index metamaterials, is used for the transmitter. A homodyne receiver is designed to simplify the receiver's architecture. Implementing an RF switch and a dual-polarized...
In this paper, two metamaterial antennas have been presented: three-dimensional (3D) flat lens antenna and 3D flattened Luneburg lens antenna, which show great advantages to the traditional antennas. This is an important application of metamaterials in the microwave engineering.
It is known to us, double-ridged horn antenna is one of common and important antenna types, it has been widely used in the EMC, measurement, radar and communication system. A 118GHz double-ridged horn antenna that possesses high performance is designed with the HFSS. VSWR, Gain and radiation pattern of the antenna can fulfill engineering demands based on the simulation of HFSS. Further, this paper...
In this paper, we study how to choose the combination coefficient of the combined field integral equation (CFIE) by comparing the iteration steps in solving the relevant matrix equation using the conjugate gradient iterative method. The tentative principle to choose the CFIE combination coefficient is given in terms of the calculations of two typical models, a cylinder and a NASA almond, with different...
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