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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...

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...

When measuring small production antennas and antenna-based assemblies, as well as for the development of millimeter-wave antennas, a requirement exists for a measurement system that is not only small but also fully portable. Designed to fulfill these needs is ORBIT/FR’s Mini-Compact Range Chamber, which is a portable test facility...

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...

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...

Filtronic Compound Semiconductor has created a new line of power PHEMT devices designed for infrastructure applications. These devices are useable at frequencies from 900 MHz cellular through 3.5 GHz WLL applications. The use of PHEMT technology results in power FETs with superior performance in ACPR and efficiency, both critical...

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...

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,...

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...

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...