This article emphasizes so-called Rayleigh fading, primarily in the UHF band, that affects mobile systems such as cellular and personal communication systems (PCS). The major elements that contribute to fading and their degradation effects in a communication channel are briefly summarized. Emphasis is then placed on methods for mitigating the degradation. Two examples of specific mitigation tec...

In this paper, a circular slot antenna fed by an offset microstrip-fed line is proposed. The antenna exhibits dual-band characteristics. The two operating frequency bands are: 1.83–2.73 GHz and 5.36–7.63GHz, which are of impedance bandwidth 39.5% and 34.9% respectively. The bands are suitable for PCS, UMTS, IMT2000, ISM, Bluetooth, RFID and WLAN applications. A parametric study has been carried...

The increasing demand for small-form-factor, wireless devices motivates research on highly-integrated, low-cost transmitters [1]. This work describes techniques that potentially allow implementation of the transmitter at higher levels of integration than previously achieved. A prototype CMOS IC for a narrow-band PCS system operating at 1.75GHz includes two baseband signal paths, an image/harmon...

This paper presents a multiband CPW-fed slot antenna with L-slot bowtie tuning stub. The proposed antenna has been designed for PCS 1900, UMTS, WLAN 802.11 a/b/g and bluetooth applications, with a cost-effective FR4 substrate. The proposed antenna still radiate as omni-directional in azimuth plane and sufficient bandwidth for all above mentions. The proposed antenna works as dual-wideband, band...

Abstract Personal access communications system (PACS) is a 2 GHz band personal communications services (PCS) standard that supports 32 kbps wireless access services for fixed and mobile subscribers. This paper presents a physical layer architecture, and evaluates the performance, of a multicarrier PACS (MPACS) system based on a combination of orthogonal frequency division multiplexing (OFDM) an...

EA L1 Misses L2 Misses Number of PCs EA L1 Misses L2 Misses Number of PCs EA L1 Misses L2 Misses Number of PCs EA L1 Misses L2 Misses Number of PCs EA L1 Misses L2 Misses Number of PCs EA L1 Misses L2 Misses Number of PCs EA L1 Misses L2 Misses Number of PCs EA L1 Misses L2 Misses Number of PCs 1 268855128 527448 9598 11925 268855128 522745 5 11721 268855128 523571

Background & Objective: Bacterial, contamination of blood components are a significant risk for transfusion reactions. Inherently, platelet concentrates (PCs) are vulnerable to bacterial contamination, due to the storage condition of processed PCs at room temperature, which provide very suitable conditions for the proliferation of microorganisms....

Saturation-recovery (SR) EPR at W-band (94 GHz) to obtain profiles of the membrane fluidity and profiles of the oxygen transport parameter is demonstrated for lens lipid membranes using phosphatidylcholine (n-PC), stearic acid (n-SASL), and cholesterol analog (ASL and CSL) spin labels, and compared with results obtained in parallel experiments at X-band (9.4 GHz). Membranes were derived from th...