Industry News

Transceiver Duplexer Design Considerations

The transceiver duplexer is a key element in avionics systems, radars, antenna arrays and wireless communication systems. The duplexer provides protection of the receiver and transmitter from unwanted parasitic signals. This article discusses several duplexer schematics, their development flow and a trade-off design. Duplexer Schematics An RF transceiver duplexer...
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An Approach for Determining MOSFET Small-signal Circuit Model Parameters

A simple method for the extraction of the small-signal model parameters of a MOSFET is proposed. The intrinsic elements determined are described as functions of the extrinsic resistances. The parasitic elements are iteratively determined using the variance of the intrinsic elements as an optimization criterion. Good agreement is obtained...
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Wideband 400 W Pulsed Power GaN Amplifier

A 400 W pulsed output power GaN HEMT amplifier operating over the 2.9 to 3.5 GHz band (17 percent bandwidth) has been developed. Under pulsed RF drive, with 10 percent duty cycle and 100 µs pulse width, the amplifier delivers an output power in the ran...
The high power and wide bandwidth potential of GaN HEMT devices is well known. 1 RFMD has been developing high power amplifiers using GaN HEMTs for various applications. A 250 W amplifier in the 2.14 to 2.5 GHz band for wireless infrastructure applications in the WCDMA and WiMAX bands...
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