| 1. |
- Baghaei Nejad, Majid, et al.
(författare)
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UWB radio module design for wireless sensor networks
- 2007
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Ingår i: Analog Integrated Circuits and Signal Processing. - : Springer Science and Business Media LLC. - 0925-1030 .- 1573-1979. ; 50:1, s. 47-57
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we describe an impulse-based ultra wideband (UWB) radio system for wireless sensor network (WSN) applications. Different architectures have been studied for base station and sensor nodes. The base station node uses coherent UWB architecture because of the high performance and good sensitivity requirements. However, to meet complexity, power and cost constraints, the sensor module uses a novel non-coherent architecture that can autonomously detect the UWB signals. The radio modules include a transceiver block, a baseband processing unit and a power management block. The transceiver block includes a Gaussian pulse generator, a multiplier, an integrator and timing circuits. For long range applications, a wideband low noise amplifier (LNA) is included in the transceiver of the sensor module, whereas in short range applications it is simply eliminated to further reduce the power consumption. In order to verify the proposed system concept, circuit level implementation is studied using 1.5 V 0.18 mu m CMOS technology. Finally, the UWB radio modules have been designed for implementation in liquid-crystal-polymer (LCP) based System-on-Package (SOP) technology for low power, low cost and small size integration. A small low cost, double-slotted, Knight's helm antenna is embedded in the LCP substrate, which shows stable characterization and a return loss better than -10 dB over the UWB band.
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| 2. |
- Duo, Xinzhong, et al.
(författare)
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A DC-13GHz LNA for UWB RFID applications
- 2004
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Ingår i: 22ND NORCHIP CONFERENCE, PROCEEDINGS. - 0780385101 ; , s. 241-244
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Konferensbidrag (refereegranskat)abstract
- In this paper, we present a 4-stage traveling wave lownoise amplifier for UWB RFID (ultra-wideband radiofrequency identification). This LNA covers a frequencyrange of DC - 13 CHz. The circuit is implemented with0.I5pm GaAs PHEMT chips embedded in flexible LCP(liquid crystal polymer) substrate. In the frequency range,the gain of the LNA is better than IO dB, fluctuation of thegain is less than 3dB, its noise figure is less than 4dB, SI 1and S22 are around -10 dB.
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| 3. |
- Koivisto, Tero, et al.
(författare)
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Sine wave as a correlating signal for UWB radio
- 2006
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Ingår i: 2006 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS. - NEW YORK, NY : IEEE. - 9780780393899 ; , s. 674-677
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Konferensbidrag (refereegranskat)abstract
- In this paper, an analog correlator for impulse radio is designed using a sine wave as a correlating signal. The design of the low-power sine wave generation circuitry is demonstrated and the analog multiplier using this waveform is implemented. The overall power consumption of the 8GHz LC-VCO and the divider-by-two circuit is 5mW.
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| 4. |
- Peltonen, Teemu, et al.
(författare)
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A 0.18 #x003BC;m CMOS Ultra-Wideband Low-Noise Amplifier with High IIP3
- 2005
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Ingår i: Proceedings of the Seventh IEEE CPMT Conference on High Density Microsystem Design, Packaging and Failure Analysis (HDP'05). ; , s. 452-454
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Konferensbidrag (refereegranskat)abstract
- In this paper an ultra-wideband low-noise amplifier (LNA) for the frequency range of 3.1 - 9.4 GHz using 0.18 mu m CMOS RF process is introduced. Single-ended single stage LNA structure utilises an input LC-ladder, cascode transistor configuration and LRC-feedback to realise an ultra broad bandwidth response. In operating frequency range noise figure (NF) of 3.1 dB and gain of 10.6 dB were achieved along with high linearity (IIP3) even upto 10.9 dBm at 3.1 GHz. With the bias network, the LNA had a total power consumption of 31 mW from 1.8 V supply.
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| 5. |
- Shen, Meigen, et al.
(författare)
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Robustness enhancement through chip-package co-design for high-speed electronics
- 2005
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Ingår i: Microelectronics Journal. - : Elsevier BV. - 0959-8324 .- 0026-2692. ; 36:9, s. 846-855
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Tidskriftsartikel (refereegranskat)abstract
- The low interaction between chip and package design has an increasingly limiting effect on the system performance. In this paper, the chip-package co-design flow is presented. We address robustness enhancement under the package and interconnection constraints as well as process, voltage, and temperature (PVT) variations by using impedance control, optimal pins assignment and transmitter equalization. From the simulation results we find that without on-chip digital compensation circuit, the variation of the driver's output impedance is 37% under different PVT conditions. However, it is only 5% when digital compensation circuit is used. Through optimal pins assignment the effective inductance of the pins is reduced. When power and ground pins are used as shielding pins, crosstalk is also decreased by 10 dB. Transmitter equalization effectively decreases inter-symbol interference caused by interconnection attenuation and dispersion. In our design example we find that without equalization the eye-diagram is almost closed at the receiver end. On the other hand with one-tap pre-emphasis equalization the eye-diagram is open and has a height of 90 mV and a width of 140 ps. It is also found that there is a clear optimal window for high data rate in this design. Without a chip-package co-design such an optimal window will not be found.
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| 6. |
- Shen, Meigen, et al.
(författare)
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UWB radio module design for wireless intelligent systems-form specification to implementation
- 2005
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Konferensbidrag (refereegranskat)abstract
- In this paper, we designed an impulse-based ultra wideband (UWB) radio module (low band) for wireless intelligent system applications such as radio frequency identification (RFID) and wireless sensor networks (WSN). The UWB radio module includes transceiver block, baseband process unit and power management block. The transceiver circuits include Gaussian pulse generator, wideband low noise amplifier (LNA), multiplier, integrator and timing circuits, which use 0.18mum, 1P6M CMOS technology. The wideband LNA has a power gain of 10dB and minimum noise figure of 2.7dB. For UWB transceiver, the power consumption of transmitter is lower than 1mW while the receiver is about 23mW. The liquid-crystal-polymer (LCP)-based system-on-package (SoP) technology is used to implement the UWB radio module for low power, low cost and small size
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| 7. |
- Shen, Meigen, et al.
(författare)
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UWB radio module design for wireless sensor networks
- 2005
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Ingår i: Norchip 2005, Proceedings. - 1424400643 ; , s. 184-187
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Konferensbidrag (refereegranskat)abstract
- In this paper, we have designed an impulse-based ultra wideband (UWB) radio module for wireless sensor networks (WSN) applications. The UWB radio module includes transceiver block, baseband process unit and power management block. The transceiver block includes Gaussian pulse generator, wideband low noise amplifier (LNA), multiplier, integrator and timing circuits, which use 0.18um, 1P6M CMOS technology. The wideband LNA has a power gain of 10dB and minimum noise figure of 2.7dB. For transceiver block, the power consumption of transmitter is lower than 1mW while the receiver is about 23mW. The liquid-crystal-polymer (LCP)-based System-on-Package (SoP) technology will be used to implement the UWB radio module for low power, low cost and small size.
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