The thesis demonstrates the design of high frequency SiGe bipolar integrated power amplifiers (PAs) for mobile communication terminals with the support of electromagnetic (EM) simulation. Three single-ended PA designs for mobile terminals operating up to 6GHz have been designed , realized and measured. The realized amplifiers fulfill the assumed requirements in terms of overall performance main...

The millimeter (mm)-wave band (from 30 to 300 GHz) is the focus of considerable academic and industrial interest because it can support high-speed and large-capacity information transmission. New applications, such as ultrahigh-speed wireless local area networks (WLAN), wireless home-links, and indoor multiplex television broadcasting for indoor environments, as well as fixed wireless access, b...

Combining heterogeneous wireless networks that cross licensed and unlicensed spectra is a promising way of supporting the surge in mobile traffic. The unlicensed band is mostly used by wireless LAN (WLAN) nodes which employ carrier sense multiple access/collision avoidance (CSMA/CA). Since the number of WLAN devices and their traffic are increasing, the wireless resource of the unlicensed band ...

In this paper, a stage wise realization of compact Bluetooth — UWB dual-band diversity antenna with WiMAX and WLAN band-notch characteristics is presented. The proposed structure consists of two co-planar semicircular dual band-notch monopole antennas, mounted with planar spiral. Individual antenna configuration provides an impedance bandwidth (VSWR < 2) for dualband i.e., both Bluetooth and UW...

To suppress electromagnetic interference at 5.5-GHz WLAN (5.15–5.825 GHz) band operation, a novel ultra-wideband (UWB) design of a slotted twin-patch monopole antenna with a band-rejection characteristic is presented. The proposed antenna with a simple structure has a large impedance bandwidth, defined by 10-dB return loss, covering the range from 2.95 to 10.85GHz, and a tunable cutoff band fro...