Designs of Ultra-Wideband, Compact and Band-Notched Slot Antennas

• Main Authors: Jen-Ho Yen, 嚴仁河
• Other Authors: Jen-Yea Jan
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/06220544517577101488

碩士 === 國立高雄應用科技大學 === 電子工程系 === 97 === In this thesis, the new designs of ultra-wideband, compact and band-notched planar slot antennas are studied and proposed for applications to Ultra-Wideband communication system. The study on two kinds of ultra-wideband printed slot antennas with asymmetrical semi-circle slots is first presented in Chapter Two. By choosing the proper ratio of two semi-circle slots, the multi-broadband operation can be obtained. In Chapter Three, we proposed a compact microstrip-line-fed Planar UWB Slot Antenna. With the antenna size cut off by a half of size and with the use of the offset microstrip feed line, the bandwidth enhancement for multi-wideband operation and size reduction can be achieved. In Chapter Fourth, with a U type of parasitic strip embedded along the bottom slot the band-notched operation at the WLAN band can be achieved. In this thesis, ultra-wideband, compact and band-notched slot antennas are presented. They are suitable for the Ultra-Wideband applications and their impedance bandwidths, determined by 10 dB return loss, can reach above 120%. Details of the proposed antenna are described, and experimental results are presented and discussed.