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Agilent's new active mixer combines high-linearity, low-LO

Posted: 24 May 2005 ?? ?Print Version ?Bookmark and Share

Keywords:power e-phemt? mobility transistor? mmic? microwave monolithic integrated circuit? active mixer?

The new high-linearity, low-LO (local oscillator) power E-pHEMT (enhancement mode pseudomorphic high electron mobility transistor) MMIC (microwave monolithic integrated circuit) active mixer from agilent technologies Inc. is designed to meet the critical performance requirements of BTS (base transceiver station) 3G base station radio cards and other point-to-point and point-to-multipoint microwave radio link applications.

The IAM-93516 high-linearity mixer combines high linearity with the industry's lowest LO drive requirement, low power consumption and broad operating frequency range. It operates with RF and LO frequency inputs from 400MHz to 3,000MHz and an IF output extending from 70MHz to 300MHz.

"The IAM-93516 is a clear performance leader in this category," commented Ting Li, GM for China/HK, Semiconductor Products Group. "It is also very cost-competitive with other high-linearity mixers on the market."

The IAM-93516 operates from a single 5Vdc supply, consuming 110mA typical. It provides >23dBm third-order input intercept point (IIP3), 19.3dBm linear power output (P1dB), 9dB conversion gain and 11.6dB noise figure (all typical). LO-to-IF, LO-to-RF and RF-to-IF isolation are each >20dB.

In a typical application (1.91GHz input frequency, 1.7GHz local oscillator and output of 210MHz), the mixer can handle an RF input as high as 10dBm without distortion, with a LO power input of 0dBm.

The new active mixer is supplied in a 3-by-3-by-0.75mm Pb-free and halogen-free 16-pin LPCC (leadless plastic chip carrier) package. The LO port is matched to 50? and can be driven differentially or single-ended, while the IF port is matched to 200? and is fully differential. The RF port requires an external matching network for optimum input return loss and third-order intercept point (IP3) performance.

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