Microwave Engineering Europe - June 2008 - (Page 40)

40 PRODUCTS 3.3 V matched gain block amplifier covers DC to 2.8 GHz in a SOT-89 package Mimix Broadband has introduced a 3.3 V InGaP HBT matched gain block amplifier that combines high linearity and gain with low thermal resistance. This versatile, multipurpose amplifier, designated CGB8002-SC, covers DC to 2.8 GHz frequency bands with 24.5 dBm of saturated power at 450 MHz, 15 dB of gain at 2.7 GHz, and an output third order intercept point of 37 dBm at 2.7 GHz. Designed for 3.3 V applications, this broadband, cascadable gain block amplifier is suitable for transmit, receive and IF applications, including 3G, fixed wireless broadband, WLAN, WiBro and WiMAX services. The amplifier is offered in an industry standard, RoHS compliant, SOT-89 package and includes ESD protection, significantly enhancing quality, reliability and ruggedness. Low thermal resistance (35 °C/W) and the more than 4000-V HBM (Human Body Model) ESD rating make the CGB8002-SC an ideal combination of low operating voltage, superior performance, high reliability and low cost. www.mwee.com/207403765 Dual-channel signal source offers fast channel switching of 15 ns An L-3 Communications company, Narda has introduced the Model 10512 programmable dual channel signal source that digitally creates frequency-modulated “noise” waveforms and applies them to a carrier whose center frequency can be varied ±50 MHz in less than 100 ns. Its characteristics make it well suited for use as a fasthopping signal generator, programmable noise source, or arbitrary signal generator. Characteristics of the waveforms generated by the signal source, such as video bandwidth, dispersion bandwidth (to 400 MHz), and power level, can be programmed by the user or remotely by a host system. The waveforms generated include ramp, sinusoidal, triangle, square wave, and random, among others. The standard model operates to 3 GHz but much higher frequency ranges are available. It consumes only 11 W and is rugged enough to meet military specifications for shock and vibration. WiMAX MIMO RF transceiver improves receiver SNR by 10 dB The MAX2839 from Maxim Integrated Products claims to be the industry’s ﬁrst singlechip, 2.3 GHz to 2.7 GHz, WiMAX MIMO RF transceiver in high-volume production. This device uses a dual-receiver architecture to mitigate RF channel fading, thereby increasing the signal-to-noise ratio (SNR) by as much as 10 dB compared to a singlereceiver architecture. Currently shipping in volume, the RF transceiver is ideal for mobile WiMAX, Korean WiBro, and other OFDMbased wireless broadband systems. Designed using the company’s in-house, highperformance SiGe BiCMOS process, the MAX2839 provides industry leading receiver noise performance. Both of the two receivers feature a low noise ﬁgure at 2.3 dB, -81 dBm sensitivity for a 64-QAM signal at 5 MHz channel bandwidth, and a 95 dB gain control range that is digitally controlled in 1 dB steps. Factory calibrated to The programmable signal source employs two VCOs and a high-speed, PIN-diode-based single-pole, double-throw switch that allows it to change from one frequency to another at extremely high speed. One VCO can operate at one frequency in a band while the other is “staged” to operate at a higher frequency. By “pingponging” the two VCOs, it is possible to hop between frequencies much faster than by retuning a single VCO. While the tuning time for a single VCO is less than 100 ns, switching time between two retuned VCOs via the highspeed switch is less than 15 ns. www.mwee.com/207403357 achieve better than -35 dB EVM, -45 dBc of sideband suppression, and carrier leakage of -40 dBc without DC-offset correction, the receivers signiﬁcantly simplify integration with the digital MAC/baseband IC. On the transmitter side, the RF transceiver features a 62 dB gain control range, digitally controlled in 1 dB steps. It delivers a 0 dBm linear output with a 64-QAM signal, greater than -45 dBc of sideband suppression, and more than -36 dB EVM, while meeting a -70 dBr spectral mask. The MAX2839 operates from a 2.7 V to 3.6 V supply. A low-power shutdown mode reduces current consumption to 10 µA. www.mwee.com/207403325 GPS and GLONASS frequency standard improves precision and coverage Pendulum Instruments, an Orolia Group company, has introduced a combined GPS and GLONASS controlled frequency standard designated GPS-12RG. The frequency standard combines the two major timing and navigation satellite systems, GPS and the Russian GLONASS, to improve the precision and signal coverage. The instrument is a further development of the company’s successful GPS-12R which uses the GPS satellites to control its output frequency. The GPS-12RG can trace its operation to both GPS and GLONASS satellites, and contains a very-high stability Rubidium atomic clock. It is a compact one-box-solution, and also contains an optional internal battery for use as UPS backup power on the bench, for warm-keeping of the oscillator during transport or for mains-free operation in the ﬁeld. The internal Rubidium oscillator gives excellent stability of a few parts in 10-12, also in hold-over operation, for example when satellite contact is lost. www.mwee.com/207403502 Microwave Engineering Europe ● June 2008 ● www.mwee.com http://www.mwee.com/207403765 http://www.mwee.com/207403357 http://www.mwee.com/207403325 http://www.mwee.com/207403502 http://www.mwee.com

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Microwave Engineering Europe - June 2008 Contents Comment News Cover Feature Designing and Simulating a Wireless LAN Antenna 60GHz: Achieving the Ultimate Wireless Dream New Radar Developments Include HFETs to Challenge DMOS/LDMOS and a 77-GHz CMOS PA for Automotive Applications Testing Raises Concerns Over 802.11-Based High-Speed Bluetooth IP2 & IP3 Design Considerations with Direct Conversion I/Q Demodulator Receiver Products Calendar

Microwave Engineering Europe - June 2008

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