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Industry News

New Products

New Waves: Amplifiers and Oscillators
SATCOM Low Noise Amplifier The model APTW4-18002650-2510-42 is a waveguide (WR-42) amplifier that offers an operating frequency of 18 to 26.5 GHz, an ultra low noise figure of 2.2 dB (191.3°K) maximum and a minimum output power of +10 dBm (+20 dBm IP3). An optimized BW from 17.8 to...
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New Literature

Solutions Brochure This brochure details the company’s semiconductor solutions for RF and microwave communications. It highlights manufacturing technologies including film bulk acoustic resonator, gallium arsenide PHEMT and enhancement mode PHEMT and silicon. Agilent Technologies Inc., Palo Alto, CA (800) 235-0312, www.agilent.com Product Brochure This brochure highlights the company’s design...
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A High Frequency Reference Module

With more than seventy years of design and development expertise in frequency control and timing, Valpey Fisher has developed an extensive knowledge base that today is leveraged to bring innovative custom solutions to demanding frequency control applications. The company is intensely focused on bringing to its customers the most...
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A High Performance GSM Quad-band PA Module with Breakthrough Size Reduction

Performance, cost and size are key to mobile phone design. Improved performance, lower cost and ever-shrinking module size parameters are universal challenges in the competitive world of mobile phone manufacturing. Over the past four years steady improvements have been made in power amplifier efficiency. Prices have likewise dropped. Yet...
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RF Power 2005

Power, efficiency, linearity: pick any three — such a choice just about summarizes the challenges presented to the power amplifier (PA) designer in 2005. As wireless systems pack more data into limited bandwidths, power amplifiers carry a bigger burden but are still required to be efficient. Simultaneously, in order...
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Amplifier and Transistor Gains Revisited

There are some fundamental basics on two-port network models. Microwave amplifiers, like the one depicted in the block diagram of Figure 1 , have been traditionally designed with scattering parameters with a goal of power gain over some prescribed bandwidth. This model format is justified because, at high frequencies,...
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A 2 to 20 GHz High Power Amplifier Using Spatial Power Combining Techniques

Combining high power microwave amplifiers with performance covering decade bandwidths is difficult to achieve. Commercially available MMIC chips offer power levels only in the 1 W range. Traveling-wave tube amplifiers (TWTA) that provide high broadband...
High power broadband amplifiers are a crucial element for a variety of defense electronics and telecommunication systems. However, the product of power and bandwidth is fixed for a specific amplifying device, that is, the broader the bandwidth, the less the output power. Hence, a variety of broadband power combining...
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Design of Linear S-band Power Amplifiers with High Power-added Efficiency

In wireless communications, linearization of the PA is sometimes required to ensure high quality of the modulated signal and maintain good PAE. PA linearization using a feed-forward technique 1–4 can be very tedious and time consuming. Without PA linearization, an approach to achieve high power and good PAE is...
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