Microwave Engineering Europe - July/August 2008 - (Page 26)

26 PRODUCTS Module boosts WiMAX network efficiency can make cellular base stations 2-3 times more efficient Nujira has announced the addition of a WiMAX optimised solution to its HAT envelope tracking modulator range for RF power amplifiers, delivering even greater energy efficiency than their standard module during WiMAX transmissions. The new Nujira HAT™ modulator module for WiMAX features a TDD mode, which puts the PA in a low power idle state during the receive interval. For WCDMA, LTE and other transmissions, the WiMAX module provides the same performance as the standard HAT modulator module from the company. The company’s HAT envelope tracking technology can make the next generation of cellular base stations 2-3 times more efficient than the current network, despite the Antennas for HIRF testing more options for more test conditions. AR RF Microwave Instrumentation has introduced a suite of three high-gain, high-power microwave horn antennas for use in DO 160 HIRF (High Intensity Radiated Frequency) testing. The company’s amplifiers and antennas are already critical components in HIRF testing due to their ability to generate high intensity field strengths. The latest suite of antennas provides more options for more test conditions. Antennas for HIRF testing include the: AT4444 covering 2 to 4 GHz with 1000-W CW, 17-kW pulse input power; AT4446 covering 4 to 6 GHz with 800-W CW, 15-kW pulse input power; and the AT4448 covering 6 to 8 GHz with 700W CW (6 to 7.5 GHz), 600-W CW (7.5 to 8 GHz) and 10 kW pulse input power. These are all high-gain, high-power microwave horn antennas that provide a minimum of 18 dB over isotropic. They supply high intensity fields for DO 160 HIRF testing. They are extremely compact and lightweight for easy mobility. Yet they’re built tough to wider frequency bandwidths and the greater performance demands required to support WiMAX, WCDMA and LTE transmissions. According to Nujira, HAT technology reduces the carbon footprint of the cellular networks and delivers a direct and significant network energy cost saving of the order of tens of millions of dollars for a typical national network. www.mwee.com/208802732 High power SPDT switch WiMAX, WLAN, fixed wireless and mesh applications Tyco Electronics M/A-COM has announced the MASW007921, a DC to 7 GHz SPDT RoHS compliant switch for applications that require low insertion loss and fast settling times over a wide frequency range in a tiny package size. A critical speciﬁcation among many linear systems is an ultra fast settling speed in both the receive and transmit path. The switching time that is required from the software/ baseband to the output power at the antenna can vary widely from application to application. To take this into account, this new device settles to more then 99 percent of its ﬁnal value within 10 µs, whereas similar GaAs switches that do not take this into account typically need closer to 100 µs to 200 µs to completely settle. In many linear systems such as WiMAX, LTE, and Ultra withstand the demands of outdoor use. All three antennas are designed to mount easily on a tripod or to a mounting plate; and can be used with AR’s power-pulsed traveling wave tube amplifiers. HIRF testing is becoming more important due to high electromagnetic fields — whether from friendly radar and other electronic devices, or generated by enemy/terrorist forces — that are a real danger to electronic equipment. These high EM fields can detonate electronically-controlled explosive devices or even disable an aircraft’s avionics. As HIRF testing becomes more common, AR is expanding its product line to meet this need. www.mwee.com/208802731 Wide Band, linear benchmarks are critical for superior system performance. The MASW007921 has an especially high initial compression point (40 dBm at 3 V), well-suited for complex modulations such as OFDM, with large peak to average power levels. The MASW-007921 is fabricated on a low-cost 0.5micron gate-length GaAs process with full passivation added for robust reliability, which is achieved in a miniature 2 mm 8 lead PDFN package. www.mwee.com/208802741 BAW filters enable WiMAX, WLAN co-existence -20 to 85 degrees Celsius range, RoHS complaint Skyworks Solutions has unveiled bulk acoustic wave (BAW) ﬁlters for customer premise equipment (CPE) that allow co-existence between WLANs and WiMAX networks. The SKY33107 is a Wi-Fi reject/WiMAX pass, and the SKY33108 is a Wi-Fi pass/ WiMAX reject, BAW ﬁlter. Both 3 x 3 mm devices have very low in-band insertion loss and input and output return loss. They also exhibit excellent rejection — in the 2.4 GHz band for the SKY33107, and 2.495 to 2.690 GHz WiMAX band for the SKY33108. The SKY33107 is intended for use in 2.495 to 2.690 GHz WiMAX band transmitter applications which also contain WLAN 802.11 b, g, n transmitters, while the SKY33108 is targeted at 2.400 to 2.473 GHz WiFi band transmitter applications which also encompass 2.495 to 2.690 GHz WiMAX transmitters. www.mwee.com/208403069 Microwave Engineering Europe ● July/August 2008 ● www.mwee.com http://www.mwee.com/208802732 http://www.mwee.com/208802731 http://www.mwee.com/208802741 http://www.mwee.com/208403069 http://www.mwee.com

Table of Contents Feed for the Digital Edition of Microwave Engineering Europe - July/August 2008

Microwave Engineering Europe - July/August 2008 Contents News Comment Cover Feature: Effective EM Simulations with Micro−λ Resolution in Macro-λ Objects — General Huygens Box Implementation RF CMOS: Programmable Transceiver IC Minimises OEM Inventory for Femtocells CAD/EDA: Software-Defined Radio Platforms CAD/EDA: Cadence Enhances RF Verification While AWR Delivers an Improved Microwave Office How to Meet the Design Challenges of WiMAX Power Amplifiers Products Calendar

Microwave Engineering Europe - July/August 2008

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