Industry News

A 60 W RF Transistor in a Cost-effective Plastic Package for 2 GHz Cellular Applications

Cellular radio systems such as GSM Edge, N-CDMA or W-CDMA are seeing increasing demand in today’s wireless infrastructure. As volume production increases, equipment manufacturers require low cost solutions with good performance from their component suppliers. Freescale Semiconductor has pioneered the use of high power plastic packages for high frequency...
Read More

Standard 5 V Medium Power InGaP Darlington Amplifiers

Wideband Darlington gain blocks have become a workhorse for RF wireless and wireline applications. The broadband linearity and direct-coupled performance has found a multitude of commercial design-ins for base station pre-drivers, repeater-pole transceivers, fiber optic transceivers, CATV and instrumentation systems. One of the drawbacks of existing Darlington amplifier solutions,...
Read More

DC to 18 GHz Test Cables

A series of wideband 50 ? coaxial test cables has been introduced that feature extra rugged construction with integrated strain relief for longer life. The CBL-series Coaxial-Flex test cables are designed for use from DC to 18 GHz and are useful over a temperature range of –55° to +105°C....
Read More

Design of a Feedback Predistortion Linear Power Amplifier

A new feedback predistortion linearizing method is proposed and analyzed. This method extracts the third-order intermodulation distortion (IMD) signal from the main power amplifier (PA) output signal and the original input signal and uses it as the pre...
Mobile communication systems currently use multi-carrier/multi-channel schemes for effective use of the frequency spectrum resources. The intermodulation has a serious impact on these communication systems in terms of adjacent channel interference, resulting in an increase of bit error rates. As the power amplifier operates close to the saturation region...
Read More

Techniques for the Integration of High-Q Millimeter-wave Filters in Multi-function MMIC Modules

There has been a widespread trend toward higher levels of integration in microwave and millimeter-wave system design, motivated by a desire to reduce cost, size and complexity, particularly as many old applications are being re-invented in array architectures. The most commonly used format for achieving high levels of integration...
Read More

An Archery-target Antenna

The "archery-target" antenna presented in this article is a directional antenna evolved from the short-backfire antenna (SBFA). The new antenna has an additional annular reflector and a much-increased large reflector when compared to the SBFA. The arch...
Parabolic-reflector antennas are widely used as microwave directional antennas. Unfortunately, the illumination of a parabolic mirror becomes rather inefficient when the dimensions of the mirror are not large enough compared to the wavelength. On the other hand, the directional gain of microwave cavity antennas1 is rather small, since it...
Read More