Wireless/RF devices

Dec. 17, 2001
PHEMT Low-Noise Transistors Feature High Dynamic Range The ATF-33143 and ATF-34143 are high-dynamic-range, low-noise pseudomorphic high-electron mobility transistor (PHEMT) devices. The devices are housed in...
PHEMT Low-Noise Transistors
Feature High Dynamic Range
The ATF-33143 and ATF-34143 are high-dynamic-range, low-noise pseudomorphic high-electron mobility transistor (PHEMT) devices. The devices are housed in 4-lead SC-70 (SOT-343) surface-mount plastic packages.

Due to its combination of low noise figure and high linearity, the ATF-34143 is ideal for the first stage of low-noise amplifiers (LNAs) in cellular/
PCS, GSM, TDMA, and CDMA basestations. The larger geometry of the ATF-33143 suits it for the first and second stages of LNAs. Also, it is easier to design for stability in the 800- to 900-MHz frequency range. Both transistors are widely used in wireless LAN and Multichannel Multipoint Distribution Service (MMDS) systems. The devices also work for systems requiring very low noise figure with high linearity in the 450-MHz to 10-GHz frequency range.

For pricing and availability information, contact the company.

Agilent Technologies Inc.
(650)752-5000; www.agilent.com

Thin-Film Inductors Boast
Very High Q And Tight Tolerances
The Accu-L series thin-film inductors are now available in a 0603 size. The devices feature very high Q and extremely tight tolerance (to ±0.1 nH). They also offer high SRF and low dc resistance. They're ideal for use in mobile communications systems, satellite TV receivers, GPS applications, filters, and matching networks.

Inductance values for the 0603 Accu-L series inductors range from 1.2 to 15 nH with tolerances to ±0.1 nH. They feature an operating-temperature range from −55°C to 125°C. The inductor meets both the performance and tolerance requirements of present cellular frequencies at 450, 900, 1700, 1900, and 2400 MHz. The capacitor's nickel/solder-coated terminations are compatible with virtually all automated assembly equipment. The capacitors are available in tape-and-reel packaging of 3000 and 10,000/reel.

The Accu-L series inductors cost approximately $0.12 each in quantity.

AVX Corp.
(803) 946-0414; www.avxcorp.com

5-GHz Solution Enhances
High-Speed Wireless LAN Connectivity
The AR5000 chip set is useful for companies developing next-generation 5-GHz wireless local area network (WLAN) products for enterprises, small/medium businesses, homes, and public areas. Companies with plans to develop AR5000-based products include Card Access, Intermec, Proxim, TDK, and others. This 802.11a-compliant chip set incorporates a complete "Radio-on-a-Chip" (RoC) and integrates a MAC/baseband processor. It is the world's first two-chip, all-CMOS, end-to-end solution for 802.11a, 5-GHz WLANs. The chip set supports all IEEE 802.11a mandatory and optional data rates up to 54 Mbits/s. It provides full 128-bit WEP encryption and support for Dynamic Key Exchange without performance degradation. It includes quality of service (QoS) support for video distribution and other multimedia applications.

The AR5000 WLAN chip set costs under $35 in OEM quantities of 100,000 units. lf

Atheros Communications
(408) 773-5294; www.atheros.com

FM Radio Modules Suit One-To-One
And Multinode Wireless Links
The QFMT5 transmitters and QFMR5 receivers enable the implementation of a simple telemetry link over a distance of up to 1200 ft. This is achieved at data rates up to 128 kbits/s. The high-performance FM radio modules suit one-to-one and multinode wireless links. Operating on the 433.92-MHz frequency band, three data rates are offered as standard—15, 50, and 128 kbits/s. While the QFMT5 measures 32 by 13 by 3.4 mm, the QFMR5 measures 49 by 17 by 4.5 mm. Both the transmitters and the receivers are supplied in a miniature, fully shielded, SIL package. The QFMT5 transmitters operate on a 3- or 5-V supply with typical supply currents of 7 and 5 mA, respectively. The QFMR5 receivers operate on a 5-V supply with a 4.8-mA supply current.

Quantity pricing for the FM modules starts at $17.

OKW Electronics
(412) 220-9244; www.okwelectronics

Platform Technology Enables
High-Speed DWDM And MAN Systems
The Hybrid Integrated Technology (HIT) platform enables highly integrated, high-speed DWDM and MAN systems. It features a special buried heterostructure and tapered fiber grating lasers. This enables designers to manufacture compact systems, including multibit channel transceivers and OADMs operating up to 128 channels and up to 10 Gbits/s per channel. HIT ensures a very small footprint as well as reduced maintenance costs. The design of the system enables low-cost manufacturing.

For pricing and availability information, contact the company.

AIFOtec AG Fiberoptics
+49 (0) 89 89577-333; www.aifotec.com

Smart Phone Chip Set
Delivers Voice And Enhanced Data
The TCS2500 chip set provides wireless device manufacturers with a complete "antenna-to-applications" solution. It enables optimal performance and power savings for 2.5G mobile devices. The chip set relies on the company's OMAP platform technology. It is the first chip set to integrate a GSM/GPRS modem and a dedicated applications processor on a single chip. It supports next-generation, bandwidth-intensive wireless applications.

The programmable DSP-based TCS2500 chip set leverages the OMAP710 processor to enable services such as multimedia messaging, short video clip and Internet audio downloads, e-mail, real-time Web browsing, and games. It includes a full array of software development tools as well as a complete OMAP710-based reference design.

For pricing and availability information, contact the company.

Texas Instruments Inc.
(800) 336-5236; www.ti.com

End-To-End Solution Speeds
Wireless Application Development
XTNDConnect Mobile Objects is a mobile application software development kit (SDK) that provides developers with a comprehensive set of tools to build custom mobile applications and extend existing applications to mobile devices.

Featuring a distributed-object architecture, this product offers tight integration with popular development environments. It provides a framework to extend corporate, LAN-based applications to mobile devices. Other applications include incorporating live database access, Web services, e-mail, network printers, and faxing and paging services into mobile applications. Optimized for wireless networks, XTNDConnect Mobile Objects works with natively compiled client applications to provide superior speed and reliable off-line capabilities. The system offers one-pass authentication, resulting in optimum speed and security.

For pricing and availability information, contact the company.

Extended Systems
(800) 235-7576; www.extendedsystems.com


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