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A reconfigurable radiation pattern antenna is constructed using half-wave dipole antenna. Metal cylinders with pin diodes are added around the dipole antenna acted as reflector and cause the change in radiation pattern for particular direction. The reconfigurable antenna works up to 32 directions with minimum beam separation of 10°.
This paper presents the design of linearly-polarized switched-beam transmitarray antennas operating in V-band for wireless backhaul applications in future mobile communication networks. These arrays are based on a simple printed-circuit-board structure with only three metal layers and no via connection in order to minimize the insertion loss, the fabrication complexity and the overall cost of the...
As the usage of wireless communication systems is increasing day by day, a number of antennas or a single antenna with multiple functions has become inevitable. This paper attempts to design a frequency as well as pattern reconfigurable microstrip patch antenna using electrical reconfiguration method. Three switching cases are involved within. The first case results in an operation at 5.7GHz and the...
This paper presents a study and comparison of complementary antenna structures to find an optimized case for the UWB frequency range. An auto-complementary antenna and quasi-complementary antennas are used as a reference to find an optimized quasi-complementary structure. With the optimized structure, the achieved frequency range is up from 2.22 GHz with impedance matching less than -10 dB. After...
This paper investigates the effective gain of antennas in indoor channels. A metric called instantaneous effective gain is proposed, and a multiple-cluster 3D channel model is used to facilitate the proposed antenna effective gain. In the multiple-cluster channel model, Laplacian and double exponential distribution are utilized to model azimuth and elevation signal power distribution respectively,...
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