A multi-band high performance single-chip transceiver for WCDMA/HSDPA

Abstract

A multi-band (bands I, II, V, VIII [option]) single-chip RFIC has been implemented in 0.18μm SiGe BiCMOS process for WCDMA/HSDPA applications. The direct-conversion receiver achieves competitive system performance: -110.5dBm sensitivity, 20dB and 12dB blocking margin for ACS case 1 and case 2, respectively, and excellent in-band blocking margins. The direct-modulation transmitter achieves more than 90dB dynamic range, and excellent EVM performance: <3.5%. In Band I, the RX section and TX section draw each 35mA and 65mA, respectively. Two dedicated on-chip fast-settling fractional-N synthesizers provide LOs for both RX and TX. The chip is housed in a 5x5 mm 2 81-pin VFBGA package.

A quad‐band W‐CDMA transceiver IC–direct conversion architecture with fractional frequency divider

“…W‐CDMA transceivers that can be applied to the 2‐GHz band [2–4] only were developed initially. Transceiver development then focused on supporting multiband operation, such as triple‐band operation (0.8‐GHz, 1.7‐GHz, and 2‐GHz bands) [5–9]. In addition, in Japan, a 1.4‐GHz‐band WCDMA service started in 2009; consequently, quad‐band transceivers supporting 1.4‐GHz band operation have been developed by many research institutions [10,11].…”

“…Conventionally, two approaches to the design of multiband cellular RFICs have been followed. The first approach is to introduce an LC‐type voltage‐controlled oscillator (VCO) with a wide frequency range [6–11]. Yoshida [11] devised a quad‐band W‐CDMA transceiver with a wideband VCO (operating from 2.9 to 4.0 GHz) and integer frequency dividers for each band.…”