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Loading of microstrip antennas provides dual frequency, tenability and compactness. In this paper a theoretical method is developed to calculate various parameters of loaded annular ring antenna via. Shorting pins. The pins are located symmetrically i.e. equispaced along the circumference of the annular ring. Various parameters such as input impedance, bandwidth, return loss, quality factor and radiation...
The paper presents the radiation performance of an elliptical (a=15 mm, b=10.5 mm) patch antenna having circular slot (R=4.8 mm) designed on glass epoxy FR4 substrate and its performance is compared with a simple elliptical patch antenna without slot. The simulation results for this antenna are obtained with available IE3D simulation software by varying semi major axis (a) and semi minor axis (b)...
This review paper envisages use of multiple antenna elements in wireless communication over frequency non-selective radio channels. Various upcoming transmit strategies are discussed and compared to existing strategies such as beam forcing and space time block coding. It is revealed through this paper that the performance of transmission algorithm is largely dependent on channel characteristics such...
In this paper a comprehensive parametric study has been carried out to understand the effects of M patch antenna and to optimize the performance of the final design. The theoretical simulations are performed using SONNET software. The results are obtained for M-shaped antennas to compare the simulation results.
Nowadays, radioelectronic systems employ multiple antenna systems. An intelligent (smart) or adaptive antennas are the most suitable for wireless communication, especially for 3G and 4G systems. Many solutions of the reconfigurable antennas have been described in the literature and their practical applications have been successfully used in telecommunication systems. In general, the reconfigurable...
We have taken single and multiple beam formation along with Beams adapted optimally to get required Direction of Arrival (DOA) estimation or directed beam forming. We analyze state of the art criteria for Adaptive antenna, suppressing the interference in directions other than desired. We model the Uniform Linear array (ULA) based on simulations of various adaptive and non-adaptive algorithms. We formulate...
Summary form only given. The talk deals the development of various types of antennas (from VHF to Ka Band frequencies) required for satellites and their respective ground stations spanning from omni directional antennas to directional, shaped beam, multiple beam antennas for satellite applications and highly directional antennas with high G/T, low sidelobes and good axial ratio for respective ground...
The simulation results of rectangular patch antenna with a rectangular notch with and without air gap are reported in this paper. The structure has three layered structure in between conducting patch and the ground plane. It is found that rectangular antenna having an appropriate size of rectangular notch resonates at two different frequencies and also provides much improved bandwidth. On the introduction...
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