 |
|
||||||||||||||||||
 |
 |
|
|
|
advertisement |
|
|
|
|
 WLAN/Bluetooth Components Jun 1, 2005 12:00 PM WLAN radio switch
Meru Networks has launched wireless products built to serve the requirements of high-density data and VoIP mobility applications. The Meru radio switch family includes the four-radio RS-4000, the eight-radio RS-8000, the 12-radio RS-12000, and a patent-pending, built-in omnidirectional antenna. The system delivers up to 648 Mbps of WLAN bandwidth using 802.11 standard radios and is capable of scaling up to 1.2 Gbps of bandwidth across its coverage zone. The radio switch accomplishes this by layering up to 12 channels in a single coverage area. RF protocol for wireless devices
Chipcon AS has announced the availability of its RadioDesk human interface device (HID) platform. Based on Chipcon's SmartRF04 CC2500 2.4 GHz radio technology, the RadioDesk platform consists of a ready-for-production keyboard and mouse reference design using Chipcon's advanced adaptive frequency-hopping (AFHSS) RF protocol. The RadioDesk RF protocol has been designed from the ground-up to address important end-user concerns facing wireless HID developers: robustness, coexistence with WLAN, Bluetooth and other 2.4 GHz devices, long battery lifetime and low latency. In combination with blocking performance of the CC2500 radio, the protocol ensures coexistence performance. The typical range of the platform is 10 meters to 15 meters. The reference design is based on the Chipcon CC2500 2.4 GHz RF transceiver. Other key components in the RadioDesk reference design include Holtek Semiconductor MCUs, the Agilent Technologies ADNS-2030 optical sensor, and an advanced chip antenna from Fractus. Without the need for any custom drivers, the plug-and-play USB solution is fully compliant with the USB HID specification. Chipcon will provide the entire reference design, including PCB layouts and software source code, to customers, free of charge. Linux in UMTS, CDMA2000 chipsets
Qualcomm has announced support for Linux on the company's Mobile Station Modem (MSM) chipsets. The initiative provides manufacturers with further design and development efficiencies for 3G smartphones and other mobile handsets by leveraging the flexibility and reliability of the Linux operating system. Availability of Linux supports handset manufacturers who wish to use this platform to design and develop a wide variety of 3G devices. Support for Linux is available on the MSM6550 single-chip solution. The MSM6550 chipset includes the BREW solution, supporting preloaded features including user interfaces and enabling OEMs and operators to offer content and application downloads to deliver differentiated features and services to consumers. Other chips in the Enhanced Multimedia Platform, including UMTS, HSDPA, and CDMA2000 1x EV-DO Rev. A, are also planned to support Linux. 900 MHz wireless Ethernet
MaxStream has introduced a wireless bridge that expands the capabilities of high-speed Ethernet networks. The XPress Ethernet bridge allows host and client Ethernet connections to communicate at a range of up to 15 miles (line-of-sight with high-gain antennas) at speeds up to 1.5 Mbps. The XPress Ethernet bridge optimizes long-range, high-speed data transmission when the cost of laying CAT5 cable is impractical and 802.11 (Wi-Fi(TM)) fails to meet range requirements or is oversaturated. Operating in the 900 MHz ISM band, the XPress Ethernet bridge (XEB) is intended for applications where the RF environment is full of interference from 2.4 GHz signals emanating from 802.11 networks, portable phones and microwave ovens. The 900 MHz band also yields more than twice the range of the 2.4 GHz band. In indoor/urban applications, the units can communicate through as many as 10 walls using the included 2.5 dBi omnidirectional antennas. ZigBee development kit
Cirronet Inc. has announced the availability of its ZigBee developer kit, which enables network designers to evaluate the ZigBee wireless standard in industrial application environments. The ZMN2400DK developer kit includes two 2.4 GHz serial interface boards, which are built around Cirronet's 100 mW ZigBee OEM module and feature both USB and RS-232 interfaces, plus power adapters, cables, antennas, batteries and demo software. Developers can use the kit to test range, speed and operation in the real-time environment, using the same inputs that would drive an actual application. They can continue using the kit to develop system interfaces and control software. The ZMN2400DK developer kit, including technical support, is available at a price of $295. Logarithmic detector
Analog Devices Inc. has announced an RF logarithmic detector/controller that measures the power of radio signals from 1 MHz to 10 GHz, covering all cellular standards and a variety of wireless infrastructure and broadband wireless applications. The AD8317 demodulating log amp (logarithmic amplifier) offers RF measurement of better than +/- 1 dB over a dynamic range of more than 50 dB and can function as a power controller when its outputs are used to adjust a PA (power amplifier) or a VGA (variable-gain amplifier), such as ADI's ADL5330. The wide 1 MHz to 10 GHz operating frequency range supports all cellular standards (GSM, CDMA, W-CDMA, and TD-SCDMA), broadband wireless standards (802.16, WiMAX, WiBro), and proprietary systems that operate in a variety of frequency bands. The AD8317 provides precise, temperature-stable performance over the full range of -40 °C to +85 °C, and an output response time of 5 ns, enabling RF burst detection to beyond 125 MHz. The device operates over a supply voltage range of 3 V to 5 V, consuming only 20 mA of current; power consumption is reduced to less than 1 mW when the device is disabled. Multiple-band antennas
PCTEL Antenna Products Group Inc. has introduced the Sharkfin antenna series to its product line for telematics applications. The Sharkfin antennas cover multiple frequencies while providing full GPS navigation support. Each antenna model is housed in an aerodynamic roof-mount design that eliminates wind noise common in external-mount vehicular applications. This series is part of PCTEL's growing Max-Matics GPS+ product line. This antenna series comprises two quad-band and two tri-band models. Model GPSQB provides quad band coverage of AMPS, PCS, GPS and WLAN frequencies, and model GPSQBE covers GSM, GSM1800, GPS and WLAN, with both providing nominal gain of 24 dB and a VSWR of less then 1.8:1 (quad-band datasheet). The tri-band models include the GPSTB antenna, covering AMPS, PCS and GPS frequencies, and the GPSTBE antenna for GSM, GSM 1800, and GPS frequencies. Both of these tri-band models provide 26 dB gain with a VSWR of less than 1.8:1. Bluetooth module
National Semiconductor Corporation has announced a member of its Simply Blue wireless family, a Bluetooth module that simplifies RF board design. The LMX9830 module eliminates cables in advanced data and voice applications for the industrial, scientific and medical (ISM) market as well as various hands-free devices. In addition to supporting serial cable replacement applications, the LMX9830 supports embedded data and voice-oriented applications by enabling multiple connections with data throughput and synchronous audio links (SCO). The LMX9830, in a 60-pin FBGA package measuring 9 mm × 6 mm × 1.2 mm, combines a Bluetooth transceiver with a baseband processor. The baseband processor features full Bluetooth 2.0 functionality and firmware and an enhanced command structure. In addition, it combines on-chip, ROM-based memory with a seamless memory patch controller and flexible patch RAM. SOC Bluetooth line
RF Micro Devices has announced a line of system-on-chip (SoC) Bluetooth products, transceivers and protocol stack software, enabling handset manufacturers to integrate Bluetooth wireless technology into current and next-generation cellular handsets. RFMD's UltimateBlue solutions are optimized to deliver capabilities, such as enhanced data rate and streaming music. WLAN for mobile
Atheros has announced its Radio-on-Chip for Mobile (ROCm) products. These single-chip wireless LAN (WLAN) solutions deliver the robust, high-throughput performance of Atheros data- and video-networking products, plus the characteristics required for mobile devices: low power consumption, small form factor, and low-overhead operation for the host device. The ROCm family includes single- and dual-band chips, the AR6001G and AR6001X, respectively. The single-chip integration of the 802.11 media access control (MAC), baseband, and RF functionality in the AR6001G and AR6001X ROCm products represents the latest in a series of systems-on-chip developed using Atheros' radio-on-chip design methodology. WLAN family
Metalink Ltd. has entered the wireless LAN (WLAN) market with the first in a planned family of products, WLANPlus, that will enable IEEE 802.11n networks to deliver the necessary performance and coverage to handle high-bandwidth digital entertainment content. The company's initial product for this emerging WLAN market segment is a single-chip RF device that supports multiple-input multiple-output (MIMO) antenna technology used in the IEEE 802.11n standard being developed for next-generation Wi-Fi. Metalink integrates two transmit and receive RF chains on one Real-MIMO chip (2 × 2 MIMO). The MtW8150 device features two transmit and receive RF chains on a single device and is designed to be compliant with any IEEE 802.11n standard that is ratified. Operating in the 4.9 GHz to 5.9 GHz world-band frequency range, it supports the pre-standard IEEE 802.11n specification and also can operate on the 20 MHz frequency channel to maintain legacy interoperability. For HDTV distribution applications, the MtW8150 can be used in an asymmetric topology with more antennas on the service side than the client side, enabling designers to apply techniques like beam forming. To further increase throughput, multiple MtW8150 devices can be cascaded, using their integrated local oscillators (LOs) combined with LO sharing to eliminate the need for any external components. Throughput can be improved using the 40 MHz channel-bonding capability. Network testing solution
Agilent Technologies Inc.'s distributed network analyzer PRO is a network troubleshooting platform that delivers a new testing paradigm by offering more testing modes and applications. Easily adapting to the most diverse usage models, the PRO delivers critical information from a wide array of network interfaces and allows engineers to accurately measure and qualify service performance, identify root cause of impairments, and troubleshoot complex problems on multiservice, multitechnology networks from any location. The J6803A distributed network analyzer PRO extends the capabilities of the network analyzer solutions from Agilent by providing local and distributed test capabilities for installation, maintenance and troubleshooting of next-generation networks. The platform incorporates a wide variety of access interfaces in a small portable platform with a breakthrough WLAN user interface, making it the most extensible tool for diagnosing network and services issues when turning up and optimizing networks. New triple-play measurements include support for HSDPA in mobile broadband networks, video protocol analysis, and an industry-first capability to directly correlate VoIP voice quality with network impairments, taking the guesswork out of analysis.
|
|
|
|
|
|
|||||||||||||
| Back to Top |
|
popular searches: zigbee | quadrature modulation | OFDM | WiMAX |
