In this paper, synthesis of unequally spaced linear antenna arrays based on an Inheritance Learning Particle Swarm Optimization (ILPSO) is presented. In order to improve the optimization efficiency of the PSO algorithm, the authors propose an inheritance learning strategy that can be applied to different topology of different PSO algorithms. In ILPSO algorithm, each cycle ...

In this paper, a novel technique for electronic beam steering in Time Modulated Linear Array (TMLA) is proposed. The beam steering technique is realized at the first sideband by controlling the switch-on time sequences of each element in the TMLA without using phase shifters. The Differential Evolution (DE) algorithm is employed to improve the gain ...

A novel slot antenna that consists of an H-shaped slot encompassed by a rectangular metallic wall and a pair of C-shaped slots outside the wall is proposed. It features a unidirectional pattern, small electrical dimensions and medium gain. The H-shaped slot radiates as an inductively loaded magnetic dipole while the induced electric currents on the ...

Passive UHF RFID (Ultra High Frequency Radio Frequency IDentification) tag consists of a microchip attached directly to an antenna. Proper impedance match between the antenna and the chip is crucial in RFID tag design. It directly influences RFID system performance characteristics such as the range of a tag. It is known that an RFID microchip ...

A novel design of a dual-polarized broadband 2-18GHz horn antenna with VSWR (Voltage Standing Wave Ratio) less than or equal to 2.2 is presented. The designed horn antenna is most suitable as a feed element in reflectors of the radar systems and EMC (ElectroMagnetic Compatability) applications. A coaxial line to quadruple-ridged waveguide transition with a ...

Recently, there are rapid developments in Wireless Local Area Networks (WLANs). To adapt to various WLAN environments, a WLAN antenna should be capable of operating at multiple frequency bands. For instance, these frequency bands may cover 2.400-2.484GHz (specified by IEEE 802.11b/g) and 5.150-5.350/5.725-5.825GHz (specified by IEEE 802.11a). Some monopole antennas for single-band are not suitable ...

An analytical solution for the radiation by a prolate hemispheroidal Dielectric Resonator Antenna (DRA) over an infinite ground plane excited by a rectangular slot is presented. The dyadic Green’s functions pertaining to a magnetic-current source are used in a form convenient for numerical computations. The dyadic Green’s functions are then employed to formulate the electromagnetic ...