There is an increase in demand for microstrip antennas with improved performance for wireless communication applications because of their planar structure, low profile, and light weight, moderate efficiency and ease of integration with active devices. In this paper, general property of rectangular micro-strip patch antenna is explained with metamaterial structure like return loss, bandwidth, directivity and gain. Comparison of return loss, bandwidth & gain of the micro-strip patch antenna at a frequency of 2GHz with and without metamaterial structures will be provided using the design tool Ansoft HFSS.
The multi-port converter proposed in this work is used for the integration of many converters in a single system. The system is the solar dc-dc standalone converter with the battery storage. The proposed integrated multiport converter consists of three separate converters they are, bidirectional PWM converter, switched capacitor converter, series resonant converter. The numbers of switches are reduced and thus the loss in the power electronics circuit is also reduced. A 300 watts prototype model of the system is implemented and the hardware results obtained is discussed and the same system is simulated using matlab software and the results are matched.
A microstrip-fed great arc shaped dipole antenna is proposed and designed for ultrawideband communications. The antenna has large bandwidth covering the frequency band from 3.8 to 9.4 GHz. With simple and proper modification of the radiation patches, a frequency notched performance is obtained at the frequencies 5.8 and 7.5GHz. This paper aims at the performance at 5GHz ISM band. The proposed antenna also provides a gain of 5.68 dB, which is better as compared to the conventional dipole antenna. Measured results show that, the proposed antenna is suitable for UWB applications due to the high performance.
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