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When covering Malaysia area by multi beams in satellite antenna, many feed horns are employed. In a previous designing, severe horn overlapping was shown. In this paper, overlapping problem of feed horn is analytically studied. The relation of feed horn size and feed position displacement is numerically clarified with parameter of the beam separation angle and F/D of a parabolic reflector. As a result,...
For the next generation (5G) mobile base station antennas, authors are developing a cylindrical lens antenna featuring a simple configuration compared to the present array antenna configuration. In order to achieve a cylindrical lens antenna, feed element should produce a bifurcated beam radiation. In this paper, the bifurcated beam is conformed by a bend array configuration. Relations of array element...
This paper presents preliminary structure of a 4×4 frequency reconfigurable microstrip array antenna using Defected Ground Structures (DGS) with aperture coupled feed line. Two resonant frequencies obtained from two different sizes of dumbbell structures etched on the ground plane are 7.5 GHz and 8.85 GHz respectively. The reconfigurability features of the antenna are based on the transition modes...
This paper presents the design of serial feed radiators in cylindrical lens antenna system for mobile base station application. The authors are developing a cylindrical lens antenna featuring a simple configuration compared to the present array antenna configuration. In order to achieve the cylindrical lens antenna, bifurcated beam radiation shall be produced by the feed elements. In this paper, the...
This paper proposes radiation reconfigurable patch antenna using feeding delay line technique. By using simulation and optimization from Computer Simulation Technology (CST) the 2 × 2 antenna array is designed and investigated. The direction of radiation pattern is controlled by interchanging two different lengths of corporate feeding network using OPEN and SHORT states of feeding line network. Working...
This paper presents the design of a 1×4 microstrip array antenna operating at 6.3GHz for C-band communication satellite application. The project aims to investigate the ability of the array to control the direction of the main lobe through a systematic least mean square method and to validate the design through accurate electromagnetic analysis. The array element consists of rectangular microstrip...
This paper designs and simulates frequency reconfigurable microstrip patch antenna using Defected Ground Structures (DGS) with aperture coupled feed line. Single element with two regular slots etched on the ground layer has been designed to represent two resonant frequency 7.5 GHz and 8.85 GHz. Comparison two antenna designs without and with DGS structure is reported in this paper. Simulated results...
This paper designs frequency reconfigurable microstrip antenna using Defected Ground Structures (DGS). The antenna designed with aperture coupled feed line to work at two different frequencies. Two periodical Dumbbell DGS geometry have been etched on the ground layer so that resonate at two different frequency band, (7.28 GHz to 7.73 GHz) and (8.55 GHz to 9.12 GHz), purposely working at meteorology...
Precise contoured beam is very important in designing antenna system for satellite broadcasting application. Through accurate contoured beam design, constant signal and optimum beam performance can be achieved throughout the region. For the case of Malaysia, two separate contoured beams for the peninsular and Borneo regions must be obtained. In this paper, a lightweight non-symmetrical array feed...
Precise contoured beam is important especially in broadcasting satellite application. In order to achieve a precise contoured beam for Malaysia, selection of feed structures is very important. In this paper, feed structures for horn antenna and array antenna are studied for a parabolic reflector antenna system. Feed positions of the feed structures are determined by a newly developed feed position...
It is very important to achieve precisely contoured beams in satellite-communication applications. For the case of Malaysia, separate contoured beams for the peninsular (West Malaysia) and Borneo (East Malaysia) regions must be achieved. For this purpose, the calculation of accurate feed positions in widely distributed feed areas is considered one of the critical aspects in designing a contoured-beam...
In the case of designing Malaysia coverage contour beams by combining multiple beams, the relation between antenna beam direction and feed position becomes very important. This relation is known as the Beam Deviation Factor (BDF). Previously, an equation for the BDF was derived from an aperture phase distribution of a parabolic reflector antenna for feed displacements in the perpendicular plane to...
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