Nikolaus Klemmer

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international solid-state circuits conference | 2011

Magnus Nilsson; Sven Mattisson; Nikolaus Klemmer; Martin Anderson; Torkel Arnborg; Peter Caputa; Staffan Ek; Lin Fan; Henrik Fredriksson; Fabien Garrigues; Henrik Geis; Hans Hagberg; Joel Hedestig; Hu Huang; Yevgeniy Kagan; Niklas Karlsson; Henrik Kinzel; Thomas Mattsson; Thomas Mills; Fenghao Mu; Andreas T. Mårtensson; Lars Nicklasson; Filip Oredsson; Ufuk Ozdemir; Fitzgerald Sungkyung Park; Tony Pettersson; Tony Påhlsson; Markus Pålsson; Stephane Ramon; Magnus Sandgren

The future of cellular radio ICs lies in the integration of an ever-increasing number of bands and channel bandwidths. Figure 21.2.1 shows the block diagram of our transceiver, together with the associated discrete front-end components. The transceiver supports 4 EDGE bands and 9 WCDMA bands (I-VI and VIII-X), while the radio can be configured to simultaneously support the 4 EDGE bands and up to 5 WCDMA bands: 3 high bands (HB) and 2 low bands (LB). The RX is a SAW-less homodyne composed of a main RX and a diversity RX. To reduce package complexity with so many bands, we chose to minimize the number of ports by using single-ended RF interfaces for both RX and TX. This saves several package pins, but requires careful attention to grounding. The main RX has 8 LNA ports and the diversity RX has 5, with some LNAs supporting multiple bands. On the TX side, 2 ports are used for all EDGE bands and 4 for the WCDMA bands.

Archive | 2003