Design and Analysis of Tapered-slot CPW-fed Ultra-wideband Antennas for Digital Home Applications

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As the demand for applying wireless technologies to our environment to make it more convenient or even a better place to live is getting stronger, many difficulties is about to be on the horizon. For example, people outside the world normally don not really concern about technology that much or what are the cutting-edges nowadays in the world, but this is not the case when it comes to the technology related to their daily live or the way they live. That makes digital home applications a hot market and that also makes scientists and engineers create more intelligent appliance (AI) for digital home usage. However, those products are all getting smaller to meet the needs of consumer and hence more challenges and difficulties appear. Several wireless technologies such as Wi-Fi, Bluetooth, etc, have been proposed for WPAN for digital home. One of them, UWB, emerges as a strong rival in wireless world since it provides a compelling solution for bandwidth, cost, power consumption, and physical size requirements of next-generation consumer electronics devices. Therefore, the antenna design for UWB radio plays the most important rule in digital home topic. In this thesis, tapered-slot CPW-fed printed antenna is proposed with a novel structure featuring reduction of antenna size. An extensive parameter study is also conducted to get clear insight the effect of proposed structure on antenna performance and then the minimized antenna of 27mm by 24mm with fractional bandwidth 109% and optimum antenna with fractional bandwidth 127% are calculated, analyzed, and fabricated. Both of them exhibits well performance in terms of return loss, radiation pattern, size, ease of integration with active devices, and immunity to nearby objects. Those characteristics substantiate the entitlement to digital home applications.