RF & Wireless

for higher integration of wireless transceivers in deeply-scaled silicon technologies. Given the overwhelming digital content of a mobile platform, ideally, the RF components should be realized with topologies that allow

Tetsuro Tamura2, Shigeaki Kawai2, Masahiro Kudo2, Tomotoshi Murakami2, Hiroyuki Nakamoto1, Nobumasa Hasegawa2, Hideki Kano2, Nobuhiro Shimazui2, Akiko Mineyama3, Kazuaki Oishi1, Masashi Shima4, Naoyoshi Tamura4, Toshihid

The main challenge is to improve its power efficiency. Although many linearization and efficiency improvement techniques have been proposed, most of these techniques are based on feed-forward, which may not be effective

Samsung Electro-Mechanics, Suwon, Korea 1 Integrating a CMOS RF power amplifier (PA) into a single-chip transceiver is one of the most challenging works in implementing radio front-ends, which presents many advantages in

shifters. Although a constant phase shift can approximate a time delay in a limited frequency band, this does not hold for larger arrays that scan over wide angles and have a large instantaneous bandwidth. In this case t

are used to limit the incident power to the level that the receiver circuitry can handle without degrading the linearity; in the transmitter path stringent power control is also desirable. Although variable-gain amplifie

The huge growth of the number of wireless devices makes wireless coexistence an increasingly relevant issue. If radios operate in close proximity, blockers as strong as 0dBm may occur, driving almost any receiver in comp

narrowband off-chip RF filtering is not compatible with the concept of software-defined radio (SDR), an SDR receiver must be designed to tolerate large out-of-band blockers with minimal gain compression and noise figure

Lund University, Lund, Sweden 3 ST-Ericsson, Lund, Sweden 1 2 The design of very-wide-band CMOS voltage-controlled oscillators (VCOs) compliant with the phase-noise specifications of cellular transmitters is non-trivial,

sensitive to interference from other radio circuitry (e.g. on-chip PA), components of the SoC system (e.g. clocks and their harmonics) and nearby radios. To prevent VCO pulling by the PA, fractional dividers can be used

Base-station (BTS) RX oscillator phase noise requirements between 600kHz and 3MHz are difficult to satisfy using a fully monolithic VCO fabricated in bulkCMOS technology. The GSM-900-BTS and the DCS-1800-BTS RX specifica

Lund University, Lund, Sweden 1 2 The RF front-ends of modern smart phones are becoming more complicated as newer standards are introduced (e.g. LTE). Reconfigurability can be used to reduce their size, provided that pow

Bang-Bang all-digital PLLs [1] for applications such as digital clock multiplication have existed for a long time, but show limited phase noise performance. Pioneering recent work [2-5] has demonstrated frequency synthes

However, their phase noise performance is typically worse than the integer-N [4, 5, 6] counterpart due to the quantization noise of the delta-sigma modulator (DSM). In this paper, we propose a low-noise fractional-N PLL

Polar or outphasing radio transmitter architectures promise higher efficiency than their Cartesian counterparts [1], but require the adoption of phase modulators with bandwidth about one order of magnitude wider than the

shown in Fig. 3.8.4. Loop Gain of this buffer at the low IF frequency helps to significantly reduce its gain and phase errors. Gains proportional to sine-wave coefficients are set by conductances proportional to sine-wav

Frank E. van Vliet1,2 1 University of Twente, Enschede, The Netherlands, TNO Science and Industry, The Hague, The Netherlands 2 Phased-array receivers provide two major benefits over single-antenna receivers

reconfigurability to replace any standard radio: they develop toward systems where a simplified antenna interface can be used, with most dedicated filtering removed. This requires a receiver accommodating much higher lin

low-IF, benefitting from a simple structure, and a high level of integration as image rejection is not a major concern, and channel selection is performed by low-frequency lowpass filters [Fig. 3.5.1(a)]. Dominated by li

Melina Apostolidou2, Leo C.N. de Vreede1, Domine Leenaerts2, Jan Sonsky3 1 Delft University of Technology, Delft, The Netherlands, NXP Semiconductors, Eindhoven, The Netherlands, 3 NXP-TSMC Research Center, Leuven, Belgi

Intel, Hillsboro, OR Process scaling enables SoC integration of radio and large digital systems at reduced cost and area. Furthermore, the crowded spectrum requires high linearity receivers to enable co-existence in the

Advanced deep-submicron CMOS processes are well-suited for a digital implementation of phase-locked loop-(PLL) based frequency synthesizers. Recently, several RF all-digital phase-locked loops (ADPLL) have been reported

all-digital PLL (ADPLL) [1] for Bluetooth radios has proven benefits of CMOS scaling and integration, demonstrators for more challenging wireless standards have emerged [2-6]. In the ADPLL, however, the digitallycontroll

of the direct upconversion type. This architecture is versatile but requires calibration of the imbalance in its quadrature branches and DC offset at its inputs, and it is vulnerable to mixer noise. We believe it consume

Jose Moreira1, Hans Geltinger1, Timo Gossmann1, Peter Pfann1, Alexander Belitzer1, Thomas Bauernfeind3 1 Infineon Technologies, Neubiberg, Germany, Infineon Technologies, Villach, Austria, 3DICE, Linz, Austria 2 The cons

receive band due to the finite duplexer TX to RX isolation. If this noise is not low enough, a SAW filter is needed before the Power Amplifier to preserve the RX sensitivity. Out-of-band noise is also an important concer

In FDD systems such as WCDMA, strong TX leakage presented at RX imposes stringent RX out-of-band (OOB) IIP3 and IIP2 requirements in addition to low noise figure (NF) requirement, usually necessitating an inter-stage SAW

Bernard Tenbroek1, Jon Strange1, Walid Ali-Ahmad2 1 3 MediaTek, West Malling, United Kingdom, 2MediaTek, Singapore, Singapore, MediaTek, Cambridge, United Kingdom The spectrum allocated for the operation of cellular serv

Alberto Cicalini1, Sankaran Aniruddhan1, Rahul Apte2, Frederic Bossu1, Ojas Choksi1, Dan Filipovic1, Kunal Godbole1, Tsai-Pi Hung1, Christos Komninakis1, David Maldonado1, Chiewcharn Narathong1, Babak Nejati1, Deirdre O’

Torkel Arnborg1, Peter Caputa1, Staffan Ek2, Lin Fan1, Henrik Fredriksson1, Fabien Garrigues3, Henrik Geis1, Hans Hagberg1, Joel Hedestig1, Hu Huang3, Yevgeniy Kagan3, Niklas Karlsson1, Henrik Kinzel1, Thomas Mattsson1,

integration and reducing bill of material (BOM) for GSM/GPRS/EDGE cellular systems. In modern cellular phones, transmit SAW filters have been largely eliminated with innovative TX architecture and circuits [1] while rece

Columbia University, New York, NY Toshiba, Kawasaki, Japan 2 Direct conversion receivers offer a high level of integration for multiband applications. For standards operating in full duplex, like WCDMA, a very high IIP2

are rapidly increasing in importance in our life. In particular, smart-phones with embedded GPS receivers are still growing their share and soon they will be the main products in the handset market. Co-existence of a GPS

Recently, signals with high peak-to-average power ratio (PAPR) are being used for metropolitan area networks (MANs) and cellular systems, and therefore highly linear transmitters (Txs) are required. The linearity perform

Nokia Research Center, currently with ST-Ericsson, Turku, Finland, Nokia Research Center, Otaniemi Lablet, Espoo, Finland 2 Wireless communications is moving towards higher data rates but also requiring dynamic scalabili

In FDD systems such as WCDMA and LTE, simultaneous TX and RX operation poses a stringent TX noise floor requirement at the RX band. To eliminate the SAW filter between the TX and the PA without desensitizing the RX in WC

Thomas Burger2, Thomas Christen1, Dimitris Papadopoulos1,4, Ilian Kouchev1, Chiara Martelli1,2, Thomas Dellsperger1 1 Advanced Circuit Pursuit, Zollikon, Switzerland ETH Zürich, Zürich, Switzerland, 3 now with Marvell Se

Khurram Waheed1, Mitch Entezari1, Gennady Feygin1, Sudheer Vemulapalli1, Vasile Zoicas1, Chih-Ming Hung1, Nathen Barton1, Imran Bashir1, Kenneth Maggio1, Michel Frechette1, Meng-Chang Lee1, John Wallberg1, Patrick Cruise

polarize between high-end smart phones and ultra-low-cost devices, with the former providing the only growth sector during the downturn recently. A key enabler for the popular smart phones, netbooks and other mobile broa

University of California, Davis, CA Cisco Systems, Davis, CA 3 Agilent Technology, Santa Clara, CA 2 Advances in photonics have typically been exploited in high performance systems, e.g. high-frequency, low-jitter clocks

This paper reports on a fully integrated electrical mode-locked oscillator. Modelocked oscillators are traveling wave oscillators that excite multiple spectral modes of a transmission line resonator and lock them in phas

The trend of low-data rate wireless sensor networks (WSN) to interface at higher data rate with other devices or networks using standard protocols such as Bluetooth Low Energy and ZigBee, calls for a flexible RF system a

Emerging sensor technologies are enabling low-cost ambulatory medical devices for remote patient monitoring. In order to replace traditional bulky wired links used to communicate data around and away from the body, recen

Microscale integration constrains energy and the lifetime microsystems like wireless sensors and biomedical implants can achieve to impractical levels. Harnessing ambient vibration energy from a small piezoelectric trans

Samuel Reed, Leila M Shepherd, Winston Wong Jr, K.T. Lim, Christofer Toumazou DNA Electronics, London, United Kingdom Point-of-care diagnostics for detection of genetic sequences require biosensing platforms that are sen

cardiovascular-related disease [1] with wearable body sensor network (WBSN) [2-3]. The WBSN introduced in [3] monitored ECG at maximum 48 points, and transferred data using arrayed inductive link for cm-range wireless in

Cambridge, MA, T2 Biosystems, Cambridge, MA 2 3 Nuclear magnetic resonance, or NMR, is the energy exchange between an RF magnetic field and an atomic nucleus such as a hydrogen proton, which is a tiny bar magnet due to i

preventing the realization of dust-size battery-less sensor nodes are reported. Sensor networks deploying large numbers of nodes are anticipated for “ambient intelligence” [1]. For such networks, the sensor nodes should

Energy harvesting is an emerging technology with applications to handheld, portable and implantable electronics. Harvesting ambient heat energy using thermoelectric generators (TEG’s) [1] is a convenient means to supply

The ever growing bandwidth requirement for novel server technologies including multi-core processing, virtualization, and networked storage leads to multichannel Internet connectivity such as 100GbE. Among the proposed s