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V-band integrated transceiver modules based on a multi-layer organic interposer technology are developed for user terminal and access point applications in future 5G mobile networks with the objective to have an efficient, scalable and cost-effective architecture. The main design constraints and issues are discussed. A 10×10-mm2 transceiver module, designed for user-terminal applications, with separate...
For about a decade, Ultra-WideBand applications demonstrated its interest for radio and imaging applications in the [3.1–4.9 GHz] frequency band. In order to carry out such applications in other frequency domains, the instantaneous frequency of the impulse signal is commonly used. This paper describes the design of an Instantaneous Frequency Measurement system in order to show its feasibility for...
This paper presents some techniques to synthesize pulses in the context of IR-UWB. Pulse synthesizers are good candidates when different kinds of pulses are needed to comply with different standards or when the shape of the pulses needs to be modified. Two different approaches are described here. Voltage Controlled Delay Line (VCDL) based pulses are first described. For this family, two kinds of combiners...
Current consumption of an IR-UWB receiver is reduced thanks to duty-cycling techniques applied to the full analog chain, thus benefiting from the impulsive nature of the signal. The coherent architecture performs down conversion by mixing the incoming pulse with a locally generated 2.75ns pulse template and needs only a 1GHz frequency synthesis instead of a power hungry 4 or 8 GHz LO. Duty cycling...
This paper presents the design of an adaptive antenna-impedance tuning unit in 0.13µm CMOS technology. The design is intended for ultra low power medical applications operating at the 2.4GHz ISM frequency band. It describes the architecture and the design of the different units which are a power amplifier, a π tunable matching network, an attenuator and a down conversion module with mixer and GmC...
We present a method to automatically match a system to the load variation accurately with a very short matching time for ultra low power medical applications. A demonstrator was fabricated and an experimental set-up in the medical implant communication system (MICS) frequency band of 402-405 MHz was realized including a pacemaker antenna prototype immersed on a homogeneous lossy liquid. The matching...
An ultra-low power (ULP) SoC including an IEEE802.15.4 2.4 GHz transceiver designed in 130 nm CMOS technology is presented. Power consumption was minimized by using a concurrent system and design optimization to avoid the over-specification of blocks. A novel minimum complexity partial correlation algorithm is used in the digital baseband receiver and drains an average of 4802 A (packet PSDU=20 bytes)...
A fully integrated 2.4 GHz transceiver based on the IEEE802.15.4 specification has been designed using a 130 nm CMOS technology. Concurrent system and design optimizations were required to reach an energy efficiency of 21.5 nJ/bit in RX mode and 32.5 nJ/bit in TX modes, respectively, at a data rate of 250 kbit/s. The circuit includes a -5 dBm transmitter, a -81 dBm sensitivity receiver, an integer...
This paper presents on overview of the two chip integration of a digital radio receiver for wireless communication systems based on ultra wideband (UWB) impulse radio technology. The chips have been integrated in a 130 nm CMOS technology. The front-end performs 1-bit direct sampling of the RF signal. The baseband processing is implemented in a FPGA. The UWB link demonstration runs at 78.125Mpulse/s...
In this paper, the problematic of co-design between LNA and antenna is addressed. The targeted application is ultra wide band where this part of front end is a main interest in RF design. A comparison is drawn out between a 50 Ohm and a co-designed version, with same LNA architecture and power consumption. Simulation results show a 7 dB power gain enhancement in the latter version. Noise factor is...
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