July, 2006 - Microwave Product Digest
Various topologies are used to generate high frequency Local Oscillator (LO) signal sources for Military, Space, Microwave Radio and Industrial Sensor applications. The tradeoffs between cost, complexity, and size, must be weighed against system requirements such as power consumption, bandwidth, and phase noise performance. LO signal sources can be created cost effectively by multiplying and amplifying the output of a high quality, narrow band VCO, in order to generate the frequencies necessary to drive the upconverter and downconverter mixers within a transceiver. Seven new Active x2 Multipliers have been added to Hittite’s broad line of active and passive frequency multiplier products. These new active doublers extend the output frequency coverage of the product line to 46 GHz, and provide enough output power capability to drive many of Hittite’s mixers directly, without the need for additional LO amplification. These Active x2 Active Multipliers are fabricated in GaAs pHEMT technology, and are comprised of an input amplifier, a low conversion loss frequency doubler, and an output buffer amplifier stage.
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Hittite Microwave (Chelmsford, MA USA) is an ISO 9001:2008 and AS9100:2009 Certified Designer and Manufacturer
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