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This paper presents an analysis and optimization method of smooth walled horn antenna by using multilevel fast multipole method (MLFMM), which provides fast computation to optimize antenna geometry by genetic algorithm (GA). Design results show that the proposed method provides an optimized geometry for an arbitrary mask pattern for a smooth walled horn geometry easily.
This paper presents two-notch antenna consisting of I-shaped ground plane and microstrip feeding lines excited out of phase. Its radiation pattern is omni- or bi-directional in E plane by changing the antenna geometry. Antenna pattern control of this notch antenna is discussed in this paper based on the geometry optimization by characteristic modes analysis. Three symmetrical modes are excited by...
This paper shows relative antenna clearance to discuss electrically occupied space of small antenna element by defining the input impedance variation in the presence of electrical disturbance near tested antennas. A half wavelength conducting wire is introduced as the disturbance. The distance from the tested antenna to the conducting wire is defined as the relative clearance and typical small antennas...
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