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WJ Communications Introduces High Linearity, Variable Gain Amplifier for Mobile Infrastructure Applications

WJ Communications, Inc. (NASDAQ: WJCI), a leading designer and supplier of RF solutions for the wireless infrastructure and RFID reader markets, today announced the VG025 variable gain amplifier (VGA), designed for various current and next generation wireless technologies, such as GPRS, GSM, CDMA and W-CDMA, for which high dynamic range and small size are required.

"We continue to work closely with our customers to create unique wireless system solutions that not only increase system performance, but also aggressively reduce system costs," said Haresh Patel, senior vice president of sales and marketing. "WJ's VG025 and other variable gain amplifiers in the series provide a cost-optimized architecture that enable OEMs to achieve high linearity over the full attenuation range of the attenuator, without compromising the system dynamic range at lower gain settings. By integrating a variable attenuator and one of WJ's proven, high linearity MESFET amplifiers into a single package, we are able to offer a VGA that is ideal for either RF or IF AGC and temperature compensation circuits, reducing circuit board area by up to 40% and eliminating approximately 25% of the required tuning elements compared to other conventional implementations."

Product Overview

The VG025 is a high dynamic range variable gain amplifier (VGA) capable of achieving an analog attenuation range of up to 21 dB. The +21 dBm output compression point and +40 dBm output intercept point of the amplifier are maintained over the entire attenuation range while operating over the 50-2200 MHz range making it ideal for either IF or RF applications. The attenuation is controlled by a single 0 to +5V analog input requiring up to 28 mA for the full attenuation range. The VG025 operates from a +5V supply voltage with a typical bias current of 150 mA and is packaged in a 16-pin 4x4 mm QFN package that is lead-free/green/RoHS compliant.

Performance can be optimized for specific frequency ranges. At 240 MHz the VG025 exhibits a gain of 15.4 dB at zero attenuation and has an attenuator range of 20 dB. And at 800 MHz it is capable of providing 15 dB gain at zero attenuation with an attenuator range of 21 dB. In either case the IP3 is typically 40 dBm and P1dB greater than 21 dBm over the full attenuator range.

The VG025 is a multi-chip module utilizing WJ Communications' proven, high reliability GaAs MESFET process for the amplifier and PIN diode technology for the attenuator. Capable of operating over the -40 to +85°C temperature range, the VG025 achieves an MTTF greater than 1000 years at a mounting temperature of +85°C. All devices are 100% RF and DC tested and packaged on tape and reel for automated surface-mount assembly. The lead-free/green/RoHS-compliant package is suitable for either standard tin-lead or higher temperature lead-free reflow profiles. The VG025 also has an ESD rating of Class 1B (HBM per JEDEC Standard JESD22-A114) and a Level 2 MSL rating at +260 C per JEDEC Standard J-STD-020.

VG025-G Variable Gain Amplifier Technical Performance:

--  Operating Frequency:  50 to 2200 MHz
--  Output Power:  +21 dBm P1dB
--  Gain:  15 dB
--  Attenuator Range:  21 dB
--  Output Intercept Point:  + 40 dBm
--  Bias:  +5V @ 150 mA
--  Package:  RoHS/Green/Lead-free 16-pin 4x4 mm QFN
    

Price and Availability

Please contact WJ Communications Sales for pricing information. The VG025 is attractively priced to be competitive with other conventional discrete approaches. Production units are available immediately. Fully assembled evaluation boards at 240, 800, and 1700-2200 MHz and loose samples are available now and can be requested directly from the WJ website (www.wj.com).

About WJ Communications

WJ Communications, Inc. is a leading provider of radio frequency (RF) solutions serving multiple markets targeting wireless communications, RF identification (RFID), broadband cable, and defense and homeland security. WJ addresses the RF challenges in these multiple markets with its highly reliable amplifiers, mixers, RF integrated circuits (RFICs), RFID reader modules, chipsets, and multi-chip (MCM) modules. For more information visit www.wj.com or call 408-577-6200.

All trademarks used, referenced, or implicitly contained herein are used in good faith and highlighted to give proper public recognition to their respective owners.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995:

This release contains forward-looking statements including statements as to the plans and objectives of management for the future operations, and statements as to the Company's expectation regarding the future economic performance, financial condition or results of operations. These forward-looking statements are not historical facts but rather are based on current expectations and our beliefs. Words such as "may," "will," "expects," "intends," "plans," "believes," "seeks," "could" and "estimates" and variations of these words and similar expressions are intended to identify forward-looking statements. The Company's actual results may differ materially from those projected in these forward-looking statements as a result of a number of factors, including, but not limited to, the growth of the wireless infrastructure market, the timing and the rate of deployment of 2.5G and 3G systems, markets served by the Company, the performance and competitiveness of the Company's products, the Company's Risk Factors as contained in the Form 10-K for year ended 2004 and such other factors as described from time to time in the Company's filings with the Securities & Exchange Commission. Readers of this release are cautioned not to place undue reliance on these forward-looking statements. The Company undertakes no obligation to publicly update or revise the forward-looking statements contained herein to reflect changed events or circumstances after the date of this press release.

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