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Differential Six-port Radio Transceiver for Ultra-wideband and Wideband Antennas
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Requirement for high speed wireless connectivity is propelling research in advanced communication systems. Low power and wide bandwidth of the ultra-wideband technology makes it a potential candidate for high speed data transmission. The six-port based radio systems and wideband antennas have been studied and presented in this dissertation for ultra-wideband applications.

The six-port modulator operation with carrier leakage suppression was demonstrated at a center frequency of 7.5 GHz. The six-port correlator utilizes a quarter wavelength transmission line for carrier leakage suppression, together with diodes or eld effect transistors as variable impedance terminations. Especially, a differential six-port modulator was designed and veried through simulation and measurement. The prototype shows its capability of carrier leakage suppression and high speed data transmission with 256-quadrature amplitude modulation at 50 Msymbol/s at the center frequency of 7.5 GHz. Furthermore, a differential six-port demodulator was demonstrated with the 16 quadrature amplitude modulation at a data rate of 0.8 Gbit/s at the center frequency of 7.5 GHz. It uses zero-bias anti-parallel Schottky diodes as power detectors.

Flexible antennas were designed such that they can be housed by folding it around in space limited environment with stable performance over a wide operation bandwidth. Measurement, on a exible dipole antenna with integrated balun, shows that it covers a frequency band from 6 to 11 GHz at a voltage standing wave ratio lower than 2.5 with the antenna eciency above 86%. A miniaturized monopole antenna that is not only capable of operating over an ultra-wideband but also for lower frequency bands was invented and veried. It covers a frequency range from 1.35 to 11.5 GHz. It gives a quasi-omnidirectional radiation pattern and high eciency. The antenna has a patent pending status with the United States Patent and Trademark Oce.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press , 2011. , 71 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1403
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-71837ISBN: 978-91-7393-052-9 (print)OAI: oai:DiVA.org:liu-71837DiVA: diva2:454355
Public defence
2011-12-01, TP51, Tappan, Campus Norrköping, Norrköping, Norrköping, 10:00 (English)
Opponent
Supervisors
Available from: 2011-11-07 Created: 2011-11-07 Last updated: 2011-11-07Bibliographically approved
List of papers
1. Differential Six-Port Demodulator
Open this publication in new window or tab >>Differential Six-Port Demodulator
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2011 (English)In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 53, no 9, 2192-2197 p.Article in journal (Refereed) Published
Abstract [en]

A differential six-port demodulator for the 7-8 GHz band is reported for the first time. It is composed of a differential six-port correlator on the two sides of the substrate and zero-bias antiparallel Schottky diodes acting as power detectors. It is theoretically analyzed and also simulated. A prototype has been fabricated and data transmission at 0.8 Gbit/s (but not the maximum) with the 16 quadrature amplitude modulation (QAM) is experimentally demonstrated.

Place, publisher, year, edition, pages
John Wiley and Sons, Ltd, 2011
Keyword
differential; six-port; direct conversion demodulator; antiparallel diode pair
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-69769 (URN)10.1002/mop.26191 (DOI)000292600900066 ()
Available from: 2011-08-10 Created: 2011-08-08 Last updated: 2017-12-08Bibliographically approved
2. Differential Six-Port Demodulator
Open this publication in new window or tab >>Differential Six-Port Demodulator
2011 (English)In: Proceedings on International Conference on Wireless Communications and Signal Processing, 2011Conference paper, Published paper (Other academic)
Abstract [en]

A differential six-port demodulator for the 7-8 GHz band is reported for the first time. It is composed of a differential six-port correlator on the two sides of the substrate and zero-bias antiparallel Schottky diodes acting as power detectors. It is theoretically analyzed and also simulated. A prototype has been fabricated and data transmission at 0.8 Gbit/s (but not the maximum) with the 16 quadrature amplitude modulation (QAM) is experimentally demonstrated.

Keyword
differential; six-port; direct conversion demodulator; antiparallel diode pair
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-71834 (URN)
Conference
International Conference on Wireless Communications and Signal Processing (WSPS2011), 9-11 November, Nanjing, China
Available from: 2011-11-07 Created: 2011-11-07 Last updated: 2011-11-07Bibliographically approved
3. Differential Six-Port Transceiver
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(English)Manuscript (preprint) (Other academic)
Abstract [en]

A differential six-port transceiver for the 7-8 GHz band is presented for the rst time. It is fabricated using double-sided parallel-strip lines. The transmitter is composed of a differential six-port correlator with a quarter wavelength arrangement for carrier suppression. Cold-mode field effect transistors are used as impedance terminations, controlled via baseband signals on the gate to source terminal. The receiver is comprised of a differential six-port correlator and diode detectors. The diodes on the front-side and the back-side are connected in antiparallel, resulting in a differential input and differential output six-port receiver. The main features of the transceiver are low complexity, low power consumption, and high data rate. Data transmission and reception with the transceiver is demonstrated with quadrature phase shift keying (QPSK) and 16-quadrature amplitude modulation (16-QAM) with 100 and 200 M symbol / s , respectively.

Keyword
Dierential, six-port, six-port transmitter, six-port receiver, transceiver, carrier suppression
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-71835 (URN)
Available from: 2011-11-07 Created: 2011-11-07 Last updated: 2015-03-18Bibliographically approved
4. Wideband Planar Antenna with Modified Ground Plane
Open this publication in new window or tab >>Wideband Planar Antenna with Modified Ground Plane
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2010 (English)In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 52, no 11, 2581-2585 p.Article in journal (Refereed) Published
Abstract [en]

In this article a miniaturized planar antenna is presented for broadband applications. Antenna miniaturization is achieved by modifying the ground plane that creates a different current path thus increasing the effective dimension of the antenna. In addition, dual chopping, slitting, and radiator position offsetting provide wideband behavior and relatively good impedance matching. The low profile antenna with its wide bandwidth, linear phase response and quasi-omnidirectional radiation pattern is attractive for the existing and future communication devices of small size. Simulated and measured results for the proposed antenna are presented and analyzed.

Place, publisher, year, edition, pages
John Wiley and Sons, Ltd, 2010
Keyword
planar antenna, miniaturization, wideband, ground plane extension, slit, offset radiator
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-66861 (URN)10.1002/mop.25519 (DOI)000281831500050 ()
Available from: 2011-03-22 Created: 2011-03-21 Last updated: 2017-12-11Bibliographically approved
5. Direct Carrier Six-Port Modulator Using a Technique to Suppress Carrier Leakage
Open this publication in new window or tab >>Direct Carrier Six-Port Modulator Using a Technique to Suppress Carrier Leakage
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2011 (English)In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 59, no 3, 741-747 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a direct carrier six-port modulator. To allow arbitrary load impedances to be used and for suppression of carrier leakage, a new circuit architecture with a technique to suppress carrier leakage is proposed and implemented. A theoretical model of the proposed modulator is derived. A prototype modulator utilizing diodes for impedance generation is designed and fabricated for a center frequency of 7.5 GHz for verification of the proposed technique. Measurements show good modulation properties when a 16 quadrature amplitude modulation signal at 100 Msymbol/s is generated, as well as good carrier leakage suppression.

Place, publisher, year, edition, pages
IEEE Institute of Electrical and Electronics, 2011
Keyword
Carrier leakage suppression, direct carrier modulator, six-port correlator
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-67308 (URN)10.1109/TMTT.2011.2104972 (DOI)000288460500026 ()
Available from: 2011-04-08 Created: 2011-04-08 Last updated: 2017-12-11Bibliographically approved
6. Six-port transceiver for 6-9 GHz ultrawideband systems
Open this publication in new window or tab >>Six-port transceiver for 6-9 GHz ultrawideband systems
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2010 (English)In: Microwave and optical technology letters (Print), ISSN 0895-2477, Vol. 42, no 3, 740-746 p.Article in journal (Refereed) Published
Abstract [en]

An ultrawideband 6-9 GHz six-port correlator is designed and manufactured.Based on this six-port correlator, behavioral models, and true component circuit designs of a transceiver are developed to study the performance of the proposed direct conversion ultrawideband transceiver topology. A new six-port modulator with controllable impedance terminations implemented with a field effect transistor in the linear operation region is presented

Keyword
Six-port transceiver, six-port transmitter, six-port receiver, UWB systems
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-53605 (URN)10.1002/mop.25021 (DOI)000274363700062 ()
Note
On the day of the defence day the status of this article was: Accepted.Available from: 2010-01-26 Created: 2010-01-26 Last updated: 2015-03-18
7. Dipole Antenna With Integrated Balun For Ultra-wideband Radio 6-9 GHz
Open this publication in new window or tab >>Dipole Antenna With Integrated Balun For Ultra-wideband Radio 6-9 GHz
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2011 (English)In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 53, no 1, 180-184 p.Article in journal (Refereed) Published
Abstract [en]

A fully integrated dipole antenna with a balun fot ulna wideband (UWB) radio in the band 6-9 GHz utilizing a flexible and rigid printed count board is presented in this at tide The balun utilizes broadside coupled microstrips and is integrated in the rigid part of the printed coma boat d whereas the radiator is placed in the flexible pat! The antenna with the balun covets the frequency band 6 0-8 5 GHz at voltage standing mate ratio (VSWR) andlt;2 0 and 55-110 GHz at VSWR andlt; 2 5 Moreover simulated and measured radiation patterns and antenna efficiency above 860% are observed

Place, publisher, year, edition, pages
John Wiley and Sons, Ltd, 2011
Keyword
balun, broadside, coupled, dipole antenna, ultra wideband
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-64238 (URN)10.1002/mop.25656 (DOI)000285231200050 ()
Available from: 2011-01-17 Created: 2011-01-17 Last updated: 2017-12-11Bibliographically approved

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