Global Universal Radio Units (GURU) Realized Using Multilayer Organics (MLO)

This paper presents for the first time the design, fabrication, and implementation of a complete multi-band radio unit using SiP/SOP technology that supports dual band WLAN (802.1 1n), WiMAX (802.16e), and Bluetooth technology in a single module. This module, the Global Universal Radio Unit (GURU), serves as a platform for integration of multiple radio bands in the smallest form factor (< 70 mm²). To achieve this level of integration in the smallest form factor high Q factor band pass filters, diplexers, couplers, and a combination thereof were realized on multilayer organic substrates using a proprietary process. Multilayer organics are being targeted as the most cost effective and highest performance alternative to technologies such as low temperature co-fired ceramic (LTCC), multilayer ceramic (MLC) and thin film on silicon (TFOS) which also strive to integrate multiple bands in a single module. The paper presents novel packaging techniques and IC integration techniques on 6-10 layer multilayer substrates with embedded components, to achieve miniaturization. As an example, a complete dual band WLAN module is presented with two transmits and two receives in a size of 4 mm x 8 mm. The module consists of two dual band PA die, two switch die and two LNA die. The multilayer board integrates input output matching circuitry, 2 diplexers, 4 baluns and several biasing circuitry for amplifiers and switches. The current standard size for such a module in the industry is approximately 10 x 14 mm which is four times larger than the module presented here.