Microwave Engineering Europe - May 2008 - (Page 37)

PRODUCTS 37 Resistors for microwave and RF applications 50 mW up to 200 W, low return loss up to 20 GHz State of the Art (SOTA) has expanded its line of high frequency chip resistors. These compact, lightweight designs are ideal for use in RF and microwave applications. In addition to the standard and MIL-PRF-55342 case sizes new components are available in 14 standard case sizes: 0402 through 3838. These high frequency resistors are available with single surface or wrap around terminations, and a variety of termination materials for solder mount epoxy bond, or wire bond applications. Construction material consists of either an alumina or beryllia body with • Lower cost than you're paying now (much lower call for a quote!) a proprietary resistor element for optimum performance. The devices are optimized for 50 ohm characteristic impedance using special manufacturing techniques to reduce VSWR. Power ratings for the resistors range from 50 mW up to 200 W with a low return loss up to 20 GHz. www.mwee.com/207401985 • Faster delivery (samples shipped from Fox the next day; production quantities in days, not weeks!) • 1 picosecond phase jitter (10X better than programmables!) • 3.3V and 2.5V versions available now • Custom frequencies from 0.75MHz to 1.350GHz (the exact frequency you need, without a premium and without delay) • 7 x 5 mm and 5 x 3.2 mm available now; 3.2 x 2.5 mm ceramic packages coming soon (very soon!) • Choice of XOs and VCXOs • Internal serial ID with comprehensive traceability • And a lot more!!! Like we said XpressO changes everything. Details await you on our web site! Once again Fox Rocks! We’re On Your Frequency. Fox Electronics EMEA +44.1767.312632 e-mail: foxonline.com/email.htm 450W RF power transistor targets UHF broadcast TV applications Designers at Freescale are not fooling around. For the past two years they have been releasing product in their 50 V laterally diffused MOS (LDMOS) process. Now they are delivering an RF power transistor that targets the entire UHF band for broadcast TV (both analog and digital, of course), and the company reports that this latestp MRF6VP3450H device delivers 50 percent more power than its closest competitor. Percentages are nice, but here are numbers: 90 W average RF output power at 860 MHz for DVB-T and 450 W peak-envelope- power (two-tone test) with 21.5 dB minimum gain, 23 dB typical gain. This level of gain and power allows for tighter designs, such as providing 320 W average output power with only two gain stages and ﬁve devices. In addition, the designers at Freescale had their eyes on reducing system-level power consumption with this device, aiming to help reduce operating costs for broadcasters. To achieve this, Freescale’s Product Manager Pierre Piel reports they had to “pay careful attention to the thermal design of device and maintain low junction temperatures, which makes the part act more efﬁciently.” The MRF6VP3450H is speciﬁed with 28 percent typical drain efﬁciency for a DVB-T 64 QAM OFDM signal and 45 percent efﬁciency in a two-tone test. Finally, the design team wanted to create a part that is rugged and able to withstand demanding environments. When operating at 50 V and 90 W average DVB-T OFDM, it can survive all phase angles of a 10:1 VSWR. Similarly, it will survive the same mismatch operating at 450 W peak pulsed power (10 µs pulse, 2.5 percent duty cycle). The device also incorporates protection against electrostatic discharge (ESD). Secure cryptographic RFID development kit enables fast, easy deployment of contactless applications Melexis Microelectronic Integrated Systems and Atmel Corporation have released Yuma+ — an innovative development kit for contactless, highly secure RFID transactions that eliminates the need for both an in-depth understanding of cryptography and the ISO14443B RFID standard. This development kit is based on Atmel’s secure CryptoRF chips®, with 64-bit embedded cryptographic engines, Atmel’s AVR® microcontroller and the Melexis MLX90121 reader IC. With the Yuma+ kit, developers of secure RFID systems no longer need an in-depth understanding of the complex details of cryptography in order to deploy secure host-client RFID systems that depend on mutual authentication and data encryption. The kit also eliminates the need to dive deeply into the details of the ISO14443B RFID standard, providing a fully turnkey reader and tag solution. Developers of secure RFID systems can now spend less time worrying about the intricacies of security and RFID and focus instead on fast deployment of their secure contactless applications. Yuma+ includes a module and an interface board. The module board which contains an AVR ATMega168 microcontroller, an MLX90121 transceiver, and simple SPI connectivity is internally matched to connect to any 50 Ohm antenna for seamless incorporation into any system. The interface board connects to a PC through USB to provide an evaluation platform for the module. Yuma+ also comes with a variety of CryptoRF tags and software CD with schematics, board layout ﬁles and a binary image of the ﬁrmware for quick, easy integration. www.mwee.com/207100161 Microwave Engineering ● May 2008 ▲ w w w. f o x o n l i n e . c o m ● www.mwee.com http://www.foxonline.com http://www.mwee.com/207401985 http://foxonline.com/email.htm http://www.foxonline.com http://www.mwee.com/207100161 http://www.mwee.com

Table of Contents Feed for the Digital Edition of Microwave Engineering Europe - May 2008

Microwave Engineering Europe - May 2008 News Contents Comment Cover Feature: How to Succeed as a GaAs Foundry Wireless Networking: Wireless Coverage Where Everybody WINS Wireless Networking: Achieving Good Coexistence in the 2.4 GHz ISM Band GPS and Satellite: GPS developments: Galileo Moves Forward with Successful Giove-B Satellite Launch — Broadcom Targets AGPS in Mobile Phones and Devices Raising the Bar for the Radio: Making 802.11n Work Reducing Power Consumption in Ultrawideband Chips WiMax Catches Second Test Wave Products Calendar

Microwave Engineering Europe - May 2008

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.