This paper presents a review of radio frequency microelectromechanical systems (RF MEMS) research within Europe. A tour of Europe is given, identifying the key institutions within France, Germany, Belgium, Switzerland, Sweden and the UK. Some of the activities from these institutions have been mentioned, with corresponding references cited. The European Union’s Network of Excellence in RF MEMS ...

This application note introduces Maxim's 2nd-generation TD-SCDMA radio frequency transceiver chipset with its V2.1 reference design. It also discusses some of the key system issues, such as sensitivity and blocker tests, that warrant careful consideration in order to create an optimum TDSCDMA RF design. Maxim TD-SCDMA RF Transceiver Chipset Maxim's TD-SCDMA mobile-phone RF chipset consists of t...

. Abstract Carrier to Noise Ratio (CNR) has been investigated for radio over fiber systems including the effects of variation in the laser linewidth and RF oscillator linewidth in this paper. Optical Single sideband signal is studied as it has tolerance for power degradation due to dispersion effects over a length of fiber. Investigations have been made out for Radio frequency of 30 GHz, with a...

Reliable wireless communication links for local-area (short-range) and regional (longrange) reach capabilities are crucial for emergency response to disasters. Lack of a dependable communication system can result in disruptions in the situational awareness between the local responders in the field and the emergency command and control centers. To date, all wireless communications systems such a...

T CDMA cellular radio system was designed to operate within the same radio frequency spectrum as the older (preceding) advanced mobile phone system (AMPS ) system in the U.S. cellular band. The RF scheme for AMPS employs many closely spaced and relatively narrowband FM channels. By contrast, the RF scheme for CDMA employs fewer, and relatively wideband RF channels. As a result, CDMA channel pla...

Radio-frequency (RF) ranging can be an important aid to an integrated navigation system, providing a key element to updating location information when GNSS systems are unavailable, blocked, or otherwise denied. The majority of the recent literature on RF ranging aids has focused on ultra wideband (UWB) ranging methods, due to the increase in ranging precision that comes with increasing RF bandw...

This paper presents the current state-of-the-art of massive antenna array architectures with significant front-end hardware savings, as an enabler for future small and powerful cell nodes that will be able to carry massive MIMO technology. Radio frequency (RF) hardware architectures with a single power amplifier are reviewed, compared, and found superior to conventional MIMO implementations in ...

Energy harvesting technology is attracting huge attention and holds a promising future for generating electrical power. This process offers various environmentally friendly al‐ ternative energy sources. Especially, radio frequency (RF) energy has interesting key at‐ tributes that make it very attractive for low-power consumer electronics and wireless sensor networks (WSNs). Ambient RF energy co...

General Dynamics C4 Systems extends the Digital Modular Radio (DMR) system to the High Frequency (HF) domain. Base-band serial and parallel tone modem functionality is integrated with embedded, AIM-based KY-99A, KWR-46, and KG-84C cryptographic algorithms plus single-sideband (SSB) radio frequency (RF) modulation to provide four channels of HF plain text (PT) and cipher text (CT) communication....

The effect of radio frequency ~rf! bias frequency on SiO2 feature etching using inductively coupled fluorocarbon plasmas is investigated. It is found that the rf bias frequency can have an important effect on SiO2 feature etch rate, microtrenching phenomena, and SiO2-to-photoresist etch selectivity. In addition, the effect of rf bias pulsing on inductively coupled fluorocarbon plasma SiO2 etchi...