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Coplanar waveguide-fed compact planar ultra-wideband antenna with inverted L-shaped and extended U-shaped ground for portable communication devices
Institution:1. Department of Electrical & Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia;2. Department of Physics, University of Chittagong, Chattogram 4331, Bangladesh;3. Computer Science Department, King Abdulaziz University, Jeddah 21589, Saudi Arabia;1. Department of Physics, College of Commerce, Arts and Science, Patna, 800020, Bihar, India;2. Jaypee University of Engineering and Technology, Guna, Madhya Pradesh, India;3. Government Polytechnic, Chapra, Bihar, India;4. Department of Nano-Technology, Aryabhatta Knowledge University, Patna, 800020, Bihar, India;5. Department of Physics, A.N College, Patna, 800013, Bihar, India
Abstract:To simultaneously cover multiple wireless services and protocols, the antenna in communication devices should operate over a wide and ultra-wide frequency band. The use of wide/ultra-wideband antennas not only lessens the number of antennas necessary to cover multiple frequency bands but also decreases the system complexity, size, and costs. To operate over the ultra-wide frequency band, in this paper a CPW-fed small antenna is reported for portable communication devices. The anticipated antenna comprises a bow-tie-shaped patch and two ground planes. One inverted L-shaped and one extended U-shaped ground plane are asymmetrically placed with the main radiator which helps the antenna prototype to realize a functional band of 3.05 – 11.25 GHz (VSWR ≤ 2). In the functional band, the studied antenna accomplished a maximum peak gain of 4.98 dBi and maximum efficiency of 94.4%. Moreover, it exhibits symmetric omnidirectional radiation patterns and good time-domain behavior. The lucrative characteristics such as simple design, very small size (24.5 × 20 mm2), ultra-wide operating band, good gain and efficiency, stable radiation characteristics, and good time-domain characteristics make it a potential candidate to be used in portable communication devices.
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