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A new line of compact RFID readers has been developed for UHF and microwave applications worldwide. WJ’s model SX2000 is the first in a series of compact EPC Class 1 RFID readers whose size and performance are enabling new RFID applications. The SX20xx RFID reader platform — only 3.37"...

The ubiquitous IEEE 488.2 interface has served the instrumentation industry well for many years, and will probably do so for many more to come. However, in order to offer considerably more customer choice for the mundane yet important task of instrument interfacing and to exploit emergent interface technologies, Milmega...

Key considerations when considering low noise amplifiers (LNA) for mobile applications include small dimensions, and low voltage operation and current consumption, allied to excellent electrical performance. Designed to meet these criteria is a new LNA based on the uPC8211TK IC that can be matched with external passive components for...

Advances in GaAs MESFET technology require accurate large-signal MESFET models to correctly predict the circuit performance of power amplifiers and oscillators utilized in RF applications and communication systems. New devices such as PHEMTs and pulse-doped MESFETs utilize a concentrated carrier region in the active layer. This leads to more...

A considerable research effort has been invested to optimize the efficiency of high frequency power amplifiers. The work has been focused on output load network design for high frequency active devices. However, the attention received by the driving waveforms and input circuits has been quite low compared to that...

Microwave oscillators form an important part of all microwave systems, such as those used in radar, communication links, navigation and electronic warfare. 1 Oscillators are required to have excellent frequency stability against variations in temperature, power supply voltage and oscillator loading (load pulling). They also need a power output...

The reliability of GaAs power FETs used in solid-state power amplifiers (SSPA) is adversely affected when operated in an overdrive (excess input power) condition for a long time due to excess gate current. Manufacturers of SSPAs use different schemes to protect the FET power devices from overdrive conditions. One...

OEMs, operators and manufacturers of base station RF power amplifiers are constantly striving for greater efficiency, whether it be in the number of connections (calls) that can be made via a base station or the amount of DC power needed to make those calls. For both scenarios, the RF...

Thunderline MultiPins™ address the many space and time saving issues facing today’s high frequency designers. In addition to being more compact than individual feedthrus, the use of MultiPins saves installation time and automatically maintains critical pitch and spacing dimensions. They are available in a variety of styles from 2...

Most VNA measurements require the use of extension cables as part of the test set-up. Measurement accuracy can be severely degraded if these cables are not stable over time and flexure. Thus, the choice of measurement cables is as important as the instrument itself. The MegaPhase® VN series are...