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Compact and Efficient Millimetre-Wave Circuits for Wideband Applications

Ohlsson, Lars LU (2015) In Series of licentiate and doctoral theses
Abstract (Swedish)
Popular Abstract in Swedish

Trådlös kommunikation via radiosystem har närapå blivit en rättighet i dagens samhälle.

Vi förväntar oss att internet inte ska vara mer fjärran än där vi senast lade vår ``smarta mobiltelefon''; antagligen inom armlängds avstånd.

Strömmning av data ökar ständigt då vi nuförtiden själva vill bestämma när och var vi ska avnjuta, till exempel senaste säsongen i favoritserien.

Visserligen kommer vi bara kunna se ett avsnitt eller två innan laddaren måste kopplas in, men det beror ju på att batteriet har för liten kapacitet.

Eller, beror det på att elektroniken drar för mycket ström?



Traditionell kisel-baserad kretsteknologi med komplementära... (More)
Popular Abstract in Swedish

Trådlös kommunikation via radiosystem har närapå blivit en rättighet i dagens samhälle.

Vi förväntar oss att internet inte ska vara mer fjärran än där vi senast lade vår ``smarta mobiltelefon''; antagligen inom armlängds avstånd.

Strömmning av data ökar ständigt då vi nuförtiden själva vill bestämma när och var vi ska avnjuta, till exempel senaste säsongen i favoritserien.

Visserligen kommer vi bara kunna se ett avsnitt eller två innan laddaren måste kopplas in, men det beror ju på att batteriet har för liten kapacitet.

Eller, beror det på att elektroniken drar för mycket ström?



Traditionell kisel-baserad kretsteknologi med komplementära transistorer är utmäkt när det gäller hantering av digital data, men är inte det enda alternativet för trådlös elektronikkonstruktion.

Antenner står för kopplingen mellan elektroniken och den elektromagnetiska radiokanalen, men behöver ett visst utrymme för att fungera optimalt.

Kretsar och antenner ska sedan klämmas in på så liten yta som möjligt, vilket medför diverse designutmaningar och risk för ineffektivitet.



I forskningen som beskrivs i den här avhandlingen används komponenter i III--V-material för att utforska vad som kan åstadkommas utanför kisel-baserad kretsteknologi.

Det är materialsystem där elektronernas grundläggande egenskaper kan påverkas på nanometernivå i så kallade heterostrukturer.

Därmed kan en enkel men energieffektiv signalgenerator förverkligas, vilken tillåter konvertering av digital data till radiosymboler vid extrema hastigheter.

Vidare demonstreras en liten men effektiv antenn i en alternativ implementering av en sändarkrets; den principiella frågan är ifall antennen och signalgeneratorn verkligen behöver vara två skilda enheter? (Less)
Abstract
Radio systems, along with the ever increasing processing power provided by computer technology, have altered many aspects of our society over the last century.

Various gadgets and integrated electronics are found everywhere nowadays; many of these were science-fiction only a few decades ago.

Most apparent is perhaps your ``smart phone'', possibly kept within arm's reach wherever you go, that provides various services, news updates, and social networking via wireless communications systems.

The frameworks of the fifth generation wireless system is currently being developed worldwide.

Inclusion of millimetre-wave technology promise high-speed piconets, wireless back-haul on pencil-beam links, and... (More)
Radio systems, along with the ever increasing processing power provided by computer technology, have altered many aspects of our society over the last century.

Various gadgets and integrated electronics are found everywhere nowadays; many of these were science-fiction only a few decades ago.

Most apparent is perhaps your ``smart phone'', possibly kept within arm's reach wherever you go, that provides various services, news updates, and social networking via wireless communications systems.

The frameworks of the fifth generation wireless system is currently being developed worldwide.

Inclusion of millimetre-wave technology promise high-speed piconets, wireless back-haul on pencil-beam links, and further functionality such as high-resolution radar imaging.



This thesis addresses the challenge to provide signals at carrier frequencies in the millimetre-wave spectrum, and compact integrated transmitter front-ends of sub-wavelength dimensions.

A radio frequency pulse generator, i.e. a ``wavelet genarator'', circuit is implemented using diodes and transistors in III--V compound semiconductor technology.

This simple but energy-efficient front-end circuit can be controlled on the time-scale of picoseconds.

Transmission of wireless data is thereby achieved at high symbol-rates and low power consumption per bit.

A compact antenna is integrated with the transmitter circuit, without any intermediate transmission line.

The result is a physically small, single-chip, transmitter front-end that can output high equivalent isotropically radiated power.

This element radiation characteristic is wide-beam and suitable for array implementations. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Professor Räisänen, Antti V., Aalto University, Finland
organization
publishing date
type
Thesis
publication status
published
subject
keywords
resonant-tunnelling diode, millimetre-wave spectrum, integrated transmitter, energy-efficiency, compact circuit, dielectric resonator antenna, transistor, wavelet generator, wideband.
in
Series of licentiate and doctoral theses
pages
186 pages
defense location
Room E:1406, E-building, Elektro och informationsteknik, Ole Römers väg 3, Lund University, Faculty of Engineering, LTH.
defense date
2015-06-05 10:15
ISSN
1654-790X
ISBN
978-91-7623-289-7 (printed)
978-91-7623-290-3 (digital)
language
English
LU publication?
yes
id
7de51bed-8ebb-4885-b0c0-7589aece58fd (old id 5337236)
date added to LUP
2015-05-08 11:31:32
date last changed
2016-09-19 08:45:01
@misc{7de51bed-8ebb-4885-b0c0-7589aece58fd,
  abstract     = {Radio systems, along with the ever increasing processing power provided by computer technology, have altered many aspects of our society over the last century. <br/><br>
Various gadgets and integrated electronics are found everywhere nowadays; many of these were science-fiction only a few decades ago.<br/><br>
Most apparent is perhaps your ``smart phone'', possibly kept within arm's reach wherever you go, that provides various services, news updates, and social networking via wireless communications systems. <br/><br>
The frameworks of the fifth generation wireless system is currently being developed worldwide. <br/><br>
Inclusion of millimetre-wave technology promise high-speed piconets, wireless back-haul on pencil-beam links, and further functionality such as high-resolution radar imaging. <br/><br>
<br/><br>
This thesis addresses the challenge to provide signals at carrier frequencies in the millimetre-wave spectrum, and compact integrated transmitter front-ends of sub-wavelength dimensions. <br/><br>
A radio frequency pulse generator, i.e. a ``wavelet genarator'', circuit is implemented using diodes and transistors in III--V compound semiconductor technology.<br/><br>
This simple but energy-efficient front-end circuit can be controlled on the time-scale of picoseconds. <br/><br>
Transmission of wireless data is thereby achieved at high symbol-rates and low power consumption per bit.<br/><br>
A compact antenna is integrated with the transmitter circuit, without any intermediate transmission line.<br/><br>
The result is a physically small, single-chip, transmitter front-end that can output high equivalent isotropically radiated power. <br/><br>
This element radiation characteristic is wide-beam and suitable for array implementations.},
  author       = {Ohlsson, Lars},
  isbn         = {978-91-7623-289-7 (printed)},
  issn         = {1654-790X},
  keyword      = {resonant-tunnelling diode,millimetre-wave spectrum,integrated transmitter,energy-efficiency,compact circuit,dielectric resonator antenna,transistor,wavelet generator,wideband.},
  language     = {eng},
  pages        = {186},
  series       = {Series of licentiate and doctoral theses},
  title        = {Compact and Efficient Millimetre-Wave Circuits for Wideband Applications},
  year         = {2015},
}