Novel Compact RF Module for Mobile WiMAX Terminal Equipment

摘要

This paper describes a radio frequency (RF) module for Mobile WiMAX, where lowcost, low power consumption, and small size are needed. To satisfy these require-ments, we developed a new micro-size RF module and a new RF CMOS LSI us-ing 90-nm CMOS technology. The RF module supports downlink multiple-inputmultiple-output (MIMO) technology and includes RF-LSIs, a power amplifier, avoltage-controlled temperature compensated crystal oscillator, and band-pass fil-ters. Its size is 15 mm x 15 mm x 1.5 mm. This new RF module is the smallest in theworld and includes all of the RF circuits necessary for Mobile WiMAX. The 2.5-GHzfrequency band is supported and the RF bandwidths are 5 and 10 MHz. (WiMAXForum profile: 3A.) This paper presents the RF architecture and high-frequencycircuit technology used for the RF-LSI and RF module. The advantage of the RFmodule is that design engineers can easily get high-quality RF performance withoutspecial RF knowledge.