DESIGN, ANALYSIS AND IMPLEMENTATION OF ACTIVE MIXER FOR 5 GHz WIRELESS LAN APPLICATIONS

Abstract

The increased need for data transmission within home and office environment has created the remarkable proliferation of the wireless standards. Some, such as Bluetooth and IEEE 802.1 lb allocated in the ISM 2.4 GHz band, are a necessary and integral part of every day living. However, this very fact has resulted in an ever increasing number of users and applications. There is an augmenting demand being made on higher data rates which have culminated in the migration of the most powerful communication standards to higher frequency bands and the integration of multiple standards in the modem mobile devices. Wi-Fi in its IEEE 802.11 a version WiMax IEEE 802.16a/e, are the leading standards of the new era of reliable broadband-connected wireless networks and both are allocated in the unlicensed 5 GHz U-NII band. The low cost and low power consumption must be key points of reference within the design of receivers and transceivers for these standards. The development of the FET's mixers, offers FET as the lowest cost and the most effective time-to-market technology. The design of RF mixers allows the challenge of the analog integration aim of the modern receivers and transceivers. In addition, constant advances in the design tools of this process provide better accuracy for the high frequency RF design. The main objective of this work is the design and implementation of mixer for 5 GHZ WLAN applications. The mixer circuit designed and characterized are the Power Combiner, the RF Matching Section and the IF section. The three blocks composition is explained, analyzed through simulation, final mixer is implemented and then test