Microwave Engineering Europe - March 2009 - (Page 28) 28 PRODUCTS Fading simulator with MIMO functions targets LTE test applications Anritsu Corporation has released the MF6900A Fading Simulator with MIMO functions as a part of its 3GPP LTE test solution portfolio. This solution will provide leading edge capability to designers of LTE terminals to help verify MIMO implementations, and to ensure the high data rate capabilities of 3GPP LTE are correctly realized in commercial devices. MIMO is considered a key LTE technology for enabling high-speed wireless communications. When implementing MIMO into LTE terminals, the technology issues faced by terminal and chipset vendors require testing of throughput in a real radio-propagation environment that includes fading and multi-paths. As a result, vendors need to emulate a fading environment to perform non-RF protocol and performance tests. When combined with the MD8430A LTE Base Station Simulator, the MF6900A uses 3G switch filter modules target multi-band multimode handsets RF Micro Devices has announced the company’s entry into the market for cellular switch filter modules. The first available switch filter modules (SFMs), the RF1194 and the RF1195, are designed for use in multi-band, multimode 3G handsets. Both SFMs leverage the company’s leadership in 3G front ends, as well as its proven GaAs manufacturing expertise, high volume cellular switch technology and filter integration capabilities demonstrated in the POLARIS® radio solutions. The RF1194 integrates a single-pole nine throw (SP9T) pHEMT switch, quad-band GSM/GPRS/EDGE transmit low-pass filtering (LPF) and four GSM/GPRS/EDGE receive (Rx) surface acoustic wave (SAW) filters, for implementation in a quadband GSM/GPRS/EDGE, triple-band WCDMA/HSPA+ 3G multimode handset. With four symmetrical GSM/GPRS/ full digital processing to meet this need by outputting an LTE multi-path fading profile that faithfully emulates 2x2MIMO, SISO, SIMO and MISO environments. In addition, close integration between the MF6900A and MD8430A offers a user-friendly set-up even for operators with no experience of complex fading test environments. The MF6900A is also designed to support WCDMA for both MIMO and inter-system handover tests, which is planned as a future software release. www.mwee.com/214302999 EDGE Rx ports and three symmetrical, high-linearity WCDMA/HSPA+ Tx/Rx ports, the RF1194 simplifies the design of 3G multimode devices by providing a flexible, platform-capable front end solution. The RF1195 integrates a single-pole ten throw (SP10T) pHEMT switch and builds upon the advantages of the RF1194’s architecture by providing an additional highlinearity port for a total of four symmetrical WCDMA/HSPA+ Tx/Rx ports. www.mwee.com/215200047 Dual downconverting mixers cover 700 MHz to 4000 MHz Maxim has introduced the MAX19995, MAX19995A, MAX19997A and MAX19999 family of dual, downconverting mixers targeted specifically for DCS/PCS, cdma2000™, WCDMA, WCS, LTE, WiMAX™, and MMDS wireless-infrastructure applications. Together with the previously announced MAX19985A, these mixers provide complete downconverter solutions that address all base-station applications spanning the 700 MHz to 4000 MHz bands. These components provide up to 24.8 dBm IIP3 linearity, up to 9 dB of conversion gain, and an unparalleled 2RF-2LO spurious rejection of up to 79 dBc. Noise figure values are also low, with values reaching down to 9 dB. Each of these parameters is critical for providing enhanced receiver sensitivity and blocker immunity. As complete SiGe downconverters, the devices integrate two state-of-the-art mixer cores, four amplifiers, three baluns, an LO splitter, and dozens of discrete components. Their conversion gain enables the elimination of a complete IF amplifier stage within the receiver lineup. The outstanding 2RF-2LO and ● 2LO-2RF performance can also ease the filtering requirements of close-in harmonics, thus leading to simpler and more cost-effective filter designs. Through this combination of integration and performance, these devices reduce downconverter solution size by a factor of 2x, and discrete part count by 45 percent. The entire family also supports two unique ‘green’ power modes in which linearity performance can be traded off for reduced power consumption. In 5 V mode, the bias currents that drive the on-chip LO buffer and IF amplifier stages can be reduced by as much as 33 percent. Using this mode of operation, a 20 percent reduction in power results in only a 3 dB reduction in IIP3 linearity. Similarly, using the 3.3 V mode of operation leads to power reductions on the order of 53 percent, with only a 4 dB to 5 dB reduction in linearity. www.mwee.com/215200054 Microwave Engineering Europe ● March 2009 www.mwee.com http://www.mwee.com/214302999 http://www.mwee.com/215200047 http://www.mwee.com/215200054 http://www.mwee.com
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