Microwave Engineering Europe - May 2008 - (Page 40)

40 PRODUCTS Solid-state power amplifier enhanced performance and spurious response CAP Wireless has announced a new version of its RM022020 power amplifier (PA) with enhanced performance that provides both excellent pulse fidelity and improved spurious response (typically -85dBc). The RM022020, which was introduced in the fall of 2007, is the first in a series of high-power instrumentation amplifiers based on the company’s patented Spatium™ broadband spatial combining technology (shown in illustration). Developed specifically for test environments that demand extreme bandwidth without switching or reconnecting amplifiers, this solid-state amplifier provides 20 W nominal saturated output power over an instantaneous band of two to 20 GHz. It offers superior intermodulation distortion (IMD) performance, linearity, and gain flatness, without the warm-up, drift, or aging issues associated with traveling wave tube amplifiers (TWTAs). The RM022020 comes in a compact rack-mount package and provides 45 dB gain (variable over 10 dB), enabling it to be driven with standard lab signal sources. It features excellent pulse fidelity, low noise figure (less than 8 dB) and, with WiMax antennas high performance for the 2.5 GHz and 3.5 GHz bands A suite of Dual Slant 45 WiMax base station antennas from Laird Technologies comprise several product options that operate across the 2.5 GHz and 3.5 GHz bands. These high-performance antennas are small in size, offer consistent and reliable performance, and are designed to be fully compliant with ETSI pattern speciﬁcations. Currently, there are four dual slant 45 antennas available: 2.5 GHz, 65-degree; 2.5 GHz, 90-degree; 3.5 GHz, 65-degree; and 3.5 GHz, 90-degree. These antennas are ideal for Maximal Ratio Combining (MRC), MIMO, and other wireless wide area network applications. They offer a highly predictable pattern and consistent performance. Further, polarization diversity can be used to mitigate the impact of multipath that often results in poor coverage areas. Other features include low sidelobe performance, excellent front-to-back ratio, and high level co-located antenna-toantenna isolation. In addition, the antennas include a rugged tilt-mount hardware kit that is convenient and cost effective. www.mwee.com/207401091 safe operation into 10:1 voltage standing wave ratio (VSWR), is highly load tolerant. Designed for general lab use, the unit saves time and increases productivity by eliminating additional calibrations, reconfigurations, and errors associated with connecting or switching multiple amplifiers. Spatium amplifiers are ideal for use when extremes of bandwidth and power are demanded. The patented technology, which incorporates a coaxial antipodal finline structure within a proprietary spatial combining architecture, provides a breakthrough product that combines the stability of solid-state amplifiers with exceptionally broad bandwidth and high power. Spatium’s unique circuit topology enables a highly manufacturable platform that leverages component commonality between different models. www.mwee.com/207401130 Single junction circulators improve IMD performance in cellular base stations RF Micro Devices has introduced ﬁve single junction circulators for wireless infrastructure applications, comprising the PC0882AG21H, PC0940AG-21H, PC1843AG-21H, PC1960AG21H and PC2140AG-21H. The circulators deliver excellent electrical performance and feature a rugged construction for the demanding requirements of high power, linear ampliﬁer and transceiver sections of cellular base stations and repeaters. The single junction circulators are manufactured with samarium cobalt (SmCo) magnets packaged in aluminum housings, providing immediate improvements in reliability and performance versus existing generations of circulators. The PCxxxAG-21H single junction family is speciﬁcally designed to cover the ﬁve major cellular frequency bands from 869 MHz to 2170 MHz, while exhibiting excellent intermodulation distortion (IMD) performance, low insertion loss and high isolation. www.mwee.com/207400903 Multi-band high-dielectric antennas target mobile handset applications Antenova has announced two high performing multi-band High Dielectric Antenna (HDA®) embedded antennas for mobile handset and portable device applications; a 4-mm low proﬁle penta-band antenna and a six-band antenna. The company’s 4 mm pentaband antenna, claimed to be the industry’s thinnest ﬁveband antenna, is ideally suited for ultra-thin mobile handsets, while the six-band antenna is ideally suited for mobile handsets, PDAs and UMPCs for the global markets. HDA antennas with their smaller size, multi-band capabilities and lower detuning qualities offer device designers and manufacturers more freedom in their PCB layout without having to sacriﬁce antenna performance and efﬁciencies. The 4-mm penta-band antenna covers GSM 850, GSM 900, DCS 1800, PCS 1900 and WCDMA 2100 and is also suitable for CDMA/TDMA 850 and 1900. With about 1 cc volume and 4 mm height, this antenna offers over 50 percent average terminal radiation efﬁciency over all ﬁve bands. The hexa-band antenna covers the same ﬁve cellular bands plus the 2.4 GHz band for Bluetooth® and Wi-Fi®, has a volume of under 5.8 cc and offers an average terminal efﬁciency of greater than 50 percent over all ﬁve cellular bands and 40 percent efﬁciency in the 2.4 GHz band. www.mwee.com/207400773 Microwave Engineering Europe ● May 2008 ● www.mwee.com http://www.mwee.com/207401091 http://www.mwee.com/207401130 http://www.mwee.com/207400903 http://www.mwee.com/207400773 http://www.mwee.com

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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

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