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High Intercept Low Noise Amplifiers for 1500 MHz through 2500 MHz using the ATF34143 High Intercept Low Noise Amplifiers for 1500 MHz through 2500 MHz using the ATF-34143 Low Noise PHEMT

Application Note 1175
Introduction
Agilent Technologies’ ATF-34143 is a low noise PHEMT designed for use in low cost commercial applications in the VHF through 6 GHz frequency range. The ATF34143 is housed in a 4-lead SC-70 (SOT-343) surface mount plastic package. The 800 micron gate width of the ATF-34143 makes it ideal for applications in the VHF and lower GHz frequency range by providing low noise figure coincident with high intercept point. The wide gate width also provides lower impedances that are easy to match. The ATF-34143 is described in two low noise amplifiers for use in PCS applications. With minor component changes, the same amplifier design can be optimized for GPS and ISM