Sökning: "vertical coupling scheme"

Visar resultat 6 - 8 av 8 avhandlingar innehållade orden vertical coupling scheme.

  1. 6. Silicon nitride-based integrated components for optical communication

    Författare :Alexander Caut; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mach-Zehnder interferometers; grating couplers; insertion loss; silicon photonics; power splitters; polarization; arrayed waveguide gratings; crosstalk; silicon nitride.;

    Sammanfattning : To follow the trend of the data traffic and to limit the size of the hyperscale data centers, communication solutions offering small footprint, low cost and low power consumption are needed. Optical interconnects used in data centers are mostly short reach (approximately 100 m) based on GaAs-based 850 nm vertical-cavity surface emitting lasers (VCSELs) and OM4 multimode fibers (MMF). LÄS MER

  3. 7. Sequential 3D Integration - Design Methodologies and Circuit Techniques

    Författare :Panagiotis Chaourani; Ana Rusu; Saul Rodriguez; Per-Erik Hellström; Georges Gielen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sequential 3D integration; monolithic inter-tier vias; design platforms; parasitic extraction flows; RF AMS circuits; inductors; heterogeneous integration; germanium transistors; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : Sequential 3D (S3D) integration has been identified as a potential candidate for area efficient ICs. It entails the sequential processing of tiers of devices, one on top the other. LÄS MER

  4. 8. Low Cost Remote Antenna Units in CMOS for Fiber-fed Distributed MIMO Systems

    Författare :Waqas Ahmad; Institutionen för elektro- och informationsteknik; []
    Nyckelord :Remote Antenna Unit; distributed MIMO systems; CMOS technology; power amplifier; linearization; CMOS photodiodes; transimpedance amplifier; radio over fiber; optical communication;

    Sammanfattning : Massive multiple input multiple output (MIMO) is a revolutionary communication technique, where large numbers of antennas are employed at the base stations to increase the spectral efficiency, reliability and data rate of the system. Moreover, in multi-user MIMO (MU-MIMO) multiple users can be served by the base stations on the same time-frequency resource. LÄS MER