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Due to increasingly wide spreading applications of location-based services (LBS), a variety of portable devices are equipped with GPS module for navigation. If a notebook or ultrabook computer is embedded with a built-in GPS antenna and module, the EMI noise generated from SSD (Solid State Drive)/USB 3.0 module of the PC will radiate to affect the receiving performance of GPS antenna[1]. We have found...
A mode-based design method for dual-band and self-deplexing antennas is presented. By analyzing the E-field distributions and cut-off frequencies of the individual modes in a T-stub loaded aperture, we selected two proper modes for the antenna designed for dual-frequency operations. The desired feature is that at the two different frequencies, the antenna may perform the same or similar radiation...
This paper presents a dual-band 4-port diversity antenna for LTE MIMO applications. The antenna element employs a dual-band design covering the 700 MHz band for LTE applications and the 2.4 GHz band for WLAN systems. The presented antenna was implemented on a laptop panel for evaluating the system performances of four-port MIMO configuration in a non-line of sight environment. Correlation coefficient...
A UWB MIMO antenna with dual-polarization and high port isolation is proposed with simulation and measurement included in this paper. The antenna shows good performances in reflection coefficient and high isolation with S21 <; 20dB in the entire UWB band. The radiation patterns show fairly constant pattern stability in aperture mode port and some variation observed for the slotline mode. The orthogonal...
A 4-port antenna is designed for evaluating the performance of an MIMO system in indoor environment. Diversity gain, correlation coefficient and channel capacity are calculated and discussed in this paper. The selection diversity becomes more unapparent when using more antennas in MIMO system. Correlation in both rich scattering and high K-factor environment are found below 0.2 and 0.5 respectively...
Compact and low-cost design has been favorable and become a trend in developing modern wireless communications products. This paper presents a compact design of printed wire inverted-F antenna with parasitic ground extrusion on a low cost FR4 PCB substrate. In general, a small antenna suffers a narrow bandwidth performance. In this study, we successfully enhance the antenna bandwidth by using two...
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