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A novel Multi-Objective Evolutionary Algorithm (MOEA)-Jumping Genes Genetic Algorithm (JGGA) is used to design planar Ultra-Wide Band (UWB) antennas. The optimization procedure aims at finding an antenna not only with low voltage standing wave ratio (VSWR) and small size, but also with stable radiation pattern and stable radiated power over the ultra-wide band. There are five objective functions and...
A new type of variable phase shifter is designed by using the Ansoft HFSS simulation software, which is based on the suspended T-junction and its equivalent circuit. It can easily realize the characteristic of equal power and phase shift.
An improved microstrip open-loop bandpass filter with controllable electric and magnetic mixed coupling is proposed. An additional transmission zero can be produced and precisely controlled by tuning electric and magnetic coupling parameters respectively. An equivalent circuit is used to analyze the behavior of the proposed filter. Simulated and measured results are in good agreement.
This letter presents a slot-loaded Yagi patch antenna with dual-band and pattern reconfigurable characteristics. The beam can scan in the E-plane by switching the modes of the antenna, which is implemented by changing the states of the switches installed in the slots etched on the parasitic patches. Different modes of the antenna have different radiation patterns and operating frequency bands. There...
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