Efficient Current Bleeding Mixer for WiMax Applications

The Worldwide Interoperability for Microwave Access, or WiMax, is a wireless communication technique based on IEEE 802.16 standards. Its advantage of sending high-data rates over long distances, while using a single base station to cover a large area, has made this technique a flexible and reliable solution for public wireless networks. In this paper, a current-bleeding Gilbert Cell down-converter mixer is proposed for WiMax direct-conversion receivers. With 5.1 dB of conversion gain, 1.5 dBm of IIP3, 36 dBm of IIP2 as well as 11.6 dB and 8.4 dB of single sideband and double sideband noise figure, respectively, the proposed 0.15 mm InGaAspHEMT mixer largely meets the WiMax standards as demonstrated though successful comparison with published designs.