InGaP/GaAs HBT MMIC Amplifier with Active Balun for Ultra-Wideband Self-Complementary Antenna(Active Circuits/Devices/Monolithic Microwave Integrated Circuits,<Special Section>Emerging Microwave Techniques)

概要

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An InGaP/GaAs HBT MMIC amplifier with an active balun has been developed for ultra-wideband radio systems (UWB). The MMIC was designed to drive a self-complementary antenna with a balanced mode, where an input impedance is 60π ohms. The MMIC consists of a common mode negative feed back ultra-wideband amplifier circuit, an active balun circuit, and a high impedance drive circuit. The developed amplifier provides a 3-dB gain roll-off bandwidth from 2.4GHz to 10.8GHz with a 14.1-dB linear power gain, and a linear power output up to 3dBm. The developed amplifier with the active balun provides a 3-dB gain roll-off bandwidth from 2.3GHz to 8.6GHz with a 21.3-dB power gain in a balanced mode, and a linear power output up to 0.6dBm. The measured total group delay is less than 32psec. Output signals at the balanced output terminals of the MMIC were kept inverted with a steep pulse shape for an impulse input signal of 57-psec pulse width.
社団法人電子情報通信学会の論文
2006-12-01