Design of L-band mobile antenna and physical analysis of schottky diode by using FDTD

Abstract

Recently a hot issue of the wireless data communications (WDC) is a technique of wireless connection between PC and other equipment such as mouse, keyboard, printer, and $\emph{etc}$. One of main concerns is the size reduction of each module in the wireless data communication, especially for antenna. Decreasing the size of an antenna, a volume of module can be reduced with a competitive price. An antenna size can be reduced by using very high dielectric materials sacrificing the antenna gain. The personal handsets for the mobile communication service have been developed into the final goals such as miniaturization, light weighting, and multiple functions. And one of the important factors of handset is the quality of communication that is determined by the numerous factors. Among the factors, the antenna that is installed in a handset and a base-station plays an important part in the quality of communication. Recently the system of mobile communication requires a small, low-priced antenna that has multiple bandwidth performances. The proposed small meander line antenna has a small size and high gain that was verified with measurement and simulation. The resonant frequency of our model can be reduced by 35 % compared to the conventional antenna. And impedance bandwidth (VSWR < 2) and gain have 9.0 % and 2.73 dBi, respectively. This has a useful application for the ISM-Band (2.4~2.4835 GHz). The wide-band bow-tie antenna has been demonstrated that a broadband bow-tie monopole type antenna with the novel impedance matching technique provided a wide bandwidth of 77.1 % ($VSWR \leq 2$), and omni-directional radiation patterns. Measurements and simulated results were performed and it was confirmed that the device could operate as a maximum bandwidth. The proposed antenna is capable of covering multi-band mobile applications such as DCS, PCS, and IMT-2000. Finally, the method that can increase the efficiency of a circuit and can reduce the power consumption i...