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Modified Sierpinski gasket fractal patch antenna for earth exploration satellite services has been proposed in this article. The proposed antenna is designed up to third iterative fractal geometry on the FR4 substrate having dielectric constant of 4.4 with height of 0.8 mm. The proposed design shows multiband characteristics at 2.8, 6.1, 7.96, 16, and 17 GHz frequencies. The maximum gain of the proposed...
This paper presents a current controller for an automotive LED driver based on a zero-voltage switching (ZVS) Ćuk converter using planar integrated magnetics. The driver outputs regulated dc current through a string of N = 1–12 LED's, which implies the need to operate over a wide output voltage range (approximately 3–40 V). It is found that the low-frequency gain of the duty-cycle-to-output-current...
This paper presents the design of microstrip slot antenna in order to investigate bandwidth enhancement with better return loss. It is observed that the impedance bandwidth can be improved through various slot configurations in microstrip patch antenna. In this study three slots of 25 mm2, 51.5mm2 and 276 mm2 are considered on the ground plane for bandwidth enhancement. It is observed that the addition...
As we know in Mobile Ad hoc network our Nodes are highly mobile. They move around the Network. Due to this network topology and number of neighboring nodes in each node frequently change. Movement of nodes from one to another network also affect to the communication between them. As we know if nodes are within the range of each other they will work properly. But any of one node is not in the range...
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