| Summary: | 碩士 === 明志科技大學 === 電機工程系碩士班 === 104 === In recent years, wireless communication have been a necessary research topic due to get better communication quality, and develop a faster and convenient wireless network.Two antennas have been proposed in the paper, they are triple band suited for USB application and symmetric slot-type UWB antenna.
The first one is USB antenna, occupies a area of 10× 10mm2 and its impedance band width covering 2.3-2.69GHz、3.3-3.7GHz and 5.15-5.85GH based on return loss > 10dB. The antenna is designed at a monopole type with branches and etched on a 0.8mm thick FR4 Substrate. By using the monopole design to excite three wide-band, its resonant electrical-lengths are calculated about λ/4 at operating frequencies and to satisfy the working frequency band of our design target.
The second antenna, a symmetric slot-type UWB antenna, occupies a area of 28×20mm2 and covers a operating band from 3.1-10.6GHz, To avoiding the interferences resulting existing 3.4-3.7GHz and 5.15-5.85GHz, two notched bands functions are designed. The overall antenna is designed based on a rectangular shape, adopting a back-side substrate to couple each other and reaching our target by using two slots design.
The mentioned above two antennas are designed by using a tool of Ansoft HFSS to simulate return loss and impedance characteristics, and then using a precise network analyzer Agilent E8362B and etching machine LPKF E33 to finish two antennas the simulated and tests , and that they are worth of prove commercial values.
|
|---|
