Ville Viikari

Peer-reviewed scientific articles

Journal article-refereed, Original research

Frequency Reconfigurable Multiband Handset Antenna Based on a Multichannel Transceiver

Hannula, Jari Matti; Saarinen, Tapio; Holopainen, Jari; Viikari, Ville

2017 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 0018-926X

Designing a passive retrodirective wireless sensor

Islam, Md Mazidul; Rasilainen, Kimmo; Karki, Sabin Kumar; Viikari, Ville

2017 in IEEE Antennas and Wireless Propagation Letters (Institute of Electrical and Electronics Engineers Inc.)

ISSN: 1536-1225

Designing Harmonic Transponders Using Lumped-Component Matching Circuits

Rasilainen, Kimmo; Ilvonen, Janne; Hannula, Jari Matti; Viikari, Ville

2017 in IEEE Antennas and Wireless Propagation Letters (Institute of Electrical and Electronics Engineers Inc.)

ISSN: 1536-1225

Carrier Aggregation Compatible MIMO Antenna for LTE Handset

Rasilainen, Kimmo; Lehtovuori, Anu; Boussada, Amine; Viikari, Ville

2017 in PROGRESS IN ELECTROMAGNETICS RESEARCH C (EMW Publishing)

ISSN: 1937-8718

Concept for Frequency Reconfigurable Antenna Based on Distributed Transceivers

Hannula, Jari-Matti; Holopainen, Jari; Viikari, Ville

2016 in IEEE Antennas and Wireless Propagation Letters (Institute of Electrical and Electronics Engineers Inc.)

ISSN: 1536-1225

Optimization of RFID Sensor with Frequency Modulation

Islam, Md. Mazidul; Song, Jinsong; Rasilainen, Kimmo; Viikari, Ville

2016 in IEEE SENSORS JOURNAL (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 1530-437X

Characterization of Transponder Antennas Using Intermodulation Response

Hannula, Jari-Matti; Rasilainen, Kimmo; Viikari, Ville

2015 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 0018-926X

Implementation of Sensor RFID: Carrying Sensor Information in the Modulation Frequency

Islam, Mazidul; Rasilainen, Kimmo; Viikari, Ville

2015 in IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 0018-9480

Harmonic Transponders: Performance and Challenges

Rasilainen, Kimmo; Ilvonen, Janne; Lehtovuori, Anu; Hannula, Jari-Matti; Viikari, Ville

2015 in PROGRESS IN ELECTROMAGNETICS RESEARCH M (EMW Publishing)

Antenna Matching at Harmonic Frequencies to Complex Load Impedance

Rasilainen, Kimmo; Ilvonen, Janne; Viikari, Ville

2015 in IEEE Antennas and Wireless Propagation Letters (Institute of Electrical and Electronics Engineers Inc.)

ISSN: 1536-1225

On Design and Evaluation of Harmonic Transponders

Rasilainen, Kimmo; Ilvonen, Janne; Lehtovuori, Anu; Hannula, Jari-Matti; Viikari, Ville

2015 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 0018-926X

Maximum-Likelihood Estimation for Passive Wireless Intermodulation Communication Sensors

Song, Jinsong; Salmi, Jussi; Viikari, Ville V.; Pesonen, Nadine M. P.

2015 in IEEE SENSORS JOURNAL (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 1530-437X

Eight-element antenna array for diversity and mimo mobile terminal in LTE 3500 MHz band

Abdullah Al-Hadi, Azremi; Ilvonen, Janne; Valkonen, Risto; Viikari, Ville

2014 in MICROWAVE AND OPTICAL TECHNOLOGY LETTERS (John Wiley and Sons Inc.)

ISSN: 0895-2477

Antenna pattern retrieval from reflection coefficient measurements with reflective loads

Du, Zhou; Viikari, Ville; Ala-Laurinaho, Juha; Tamminen, Aleksi; Räisänen, Antti

2014 in PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER (E M W PUBLISHING)

ISSN: 1070-4698

Design Strategy for 4G Handset Antennas and a Multiband Hybrid Antenna

Ilvonen, Janne; Valkonen, Risto; Holopainen, Jari; Viikari, Ville

2014 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 0018-926X

Multiband Frequency Reconfigurable 4G Handset Antenna with MIMO Capability

Ilvonen, Janne; Valkonen, Risto; Holopainen, Jari; Viikari, Ville

2014 in PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER (E M W PUBLISHING)

ISSN: 1070-4698

Realizing Frequency Division Multiple Access with Passive Wireless Intermodulation Communication Sensors

Song, Jinsong; Pesonen, Nadine; Viikari, Ville; Seppä, Heikki

2014 in MICROWAVE AND OPTICAL TECHNOLOGY LETTERS (John Wiley and Sons Inc.)

ISSN: 0895-2477

Design and Measurement-Based Evaluation of Multi-Antenna Mobile Terminals for LTE 3500 MHz Band

Bin Abdullah Al-Hadi, Azremi; Jamaly, Nima; Haneda, Katsuyuki; Icheln, Clemens; Viikari, Ville

2013 in PROGRESS IN ELECTROMAGNETIC RESEARCH B (Electromagnetics Academy)

Extension to Characterization Model for GPS Antenna Performance in Mobile Terminals

Ilvonen, Janne; Rasilainen, Kimmo; Valkonen, Risto; Holopainen, Jari; Krogerus, Joonas; Viikari, Ville

2013 in IEEE Antennas and Wireless Propagation Letters (Institute of Electrical and Electronics Engineers Inc.)

ISSN: 1536-1225

Wake-up radio architecture utilizing passive down conversion mixing

Pursula, Pekka; Viikari, Ville; Saari, Juha-Matti

2013 in MICROWAVE AND OPTICAL TECHNOLOGY LETTERS (John Wiley and Sons Inc.)

ISSN: 0895-2477

Optimization of wireless sensors based on intermodulation communication

Song, J.; Viikari, Ville; Pesonen, N.; Marttila, I.; Seppä, H.

2013 in IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 0018-9480

Passive wireless sensor platform utilizing a mechanical resonator

Viikari, Ville; Song, Jinsong; Seppä, Heikki

2013 in IEEE SENSORS JOURNAL (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 1530-437X

Phase-Based UHF RFID Tracking with Non-Linear Kalman Filtering and Smoothing

Särkkä, Simo; Viikari, Ville; Huusko, Miika; Jaakkola, Kaarle

2012 in IEEE SENSORS JOURNAL (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 1530-437X

Antenna tests with a hologram-based CATR at 650 GHz

Karttunen, Aki; Ala-Laurinaho, Juha; Vaaja, Matti; Koskinen, Tomi; Häkli, Janne; Lönnqvist, Anne; Mallat, Juha; Tamminen, Aleksi; Viikari, Ville; Räisänen, Antti V.

2009 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 0018-926X

Estimator for reflective delay line-type SAW sensors

Viikari, Ville; Kokkonen, Kimmo; Meltaus, Johanna; Seppä, Heikki

2009 in IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Optimized signal processing for FMCW interrogated reflective delay line-type SAW sensors

Viikari, Ville; Kokkonen, Kimmo; Meltaus, Johanna

2008 in IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Antenna pattern correction technique based on an adaptive array algorithm

Viikari, Ville; Kolmonen, Veli-Matti; Salo, Jari; Räisänen, Antti V.

2007 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Antenna pattern correction technique based on signal-to-interference ratio optimization

Viikari, Ville; Räisänen, Antti V.

2007 in IEEE Antennas and Wireless Propagation Letters (Institute of Electrical and Electronics Engineers Inc.)

A frequency shift technique for pattern correction in hologram-based CATRs

Viikari, Ville; Mallat, Juha; Ala-Laurinaho, Juha; Häkli, Janne; Räisänen, Antti V.

2006 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Testing of a 1.5 m reflector antenna at 322 GHz in a CATR based on a hologram

Häkli, Janne; Koskinen, Tomi; Lönnqvist, Anne; Säily, Jussi; Mallat, Juha; Ala-Laurinaho, Juha; Viikari, Ville; Räisänen, Antti V.; Tuovinen, Jussi

2005 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Sub-mm antenna tests in a hologram based CATR

Häkli, Janne; Ala-Laurinaho, Juha; Koskinen, Tomi; Lemanczyk, Jerzy; Lönnqvist, Anne; Mallat, Juha; Räisänen, Antti V.; Säily, Jussi; Tuovinen, Jussi; Viikari, Ville

2005 in IEEE ANTENNAS AND PROPAGATION MAGAZINE (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Hologram-based compact range for submillimeter-wave antenna testing

Lönnqvist, Anne; Koskinen, Tomi; Häkli, Janne; Säily, Jussi; Ala-Laurinaho, Juha; Mallat, Juha; Viikari, Ville; Tuovinen, Jussi; Räisänen, Antti V.

2005 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

A feed scanning based APC technique for compact antenna test ranges

Viikari, Ville; Häkli, Janne; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti V.

2005 in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Millimeter wave beam shaping using holograms

Meltaus, Johanna; Salo, Janne; Noponen, Eero; Salomaa, Martti M.; Viikari, Ville; Lönnqvist, Anne; Koskinen, Tomi; Säily, Jussi; Häkli, Janne; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti V.

2003 in IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

Holograms for shaping radio-wave fields

Salo, Janne; Meltaus, Johanna; Noponen, Eero; Salomaa, Martti M.; Lönnqvist, Anne; Koskinen, Tomi; Viikari, Ville; Säily, Jussi; Häkli, Janne; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti V.

2002 in JOURNAL OF OPTICS A: PURE AND APPLIED OPTICS (IOP Publishing Ltd.)

Review article, Literature review, Systematic review

RFID-Based Book Finder [Education Corner]

Toivanen, Lasse; Heino, Mikko; Oksman, Aapo; Vienamo, Aapo; Holopainen, Jari; Viikari, Ville

2016 in IEEE ANTENNAS AND PROPAGATION MAGAZINE (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC)

ISSN: 1045-9243

Transponder Designs for Harmonic Radar Applications

Rasilainen, Kimmo; Viikari, Ville V.

2015 in INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION (Hindawi Publishing Corporation)

ISSN: 1687-5869

Book section, Chapters in research books

Antenna Measurements at Millimeter and Submillimeter Wavelengths

Räisänen, Antti V.; Ala-Laurinaho, Juha; Crowe, Thomas; Pivnenko, Sergiy; Castañer, Manuel Sierra; Viikari, Ville

2018 in Signals and Communication Technology (SPRINGER)

ISBN: 978-3-319-62773-1

ISSN: 1860-4862

Conference proceedings

Millimeter wave antenna array based on dielectric-filled waveguides

Ala-Laurinaho, J.; Semkin, V.; Kähkönen, H.; Viikari, V.; Räisänen, A. V.

2017

ISBN: 9781538640036

Further investigations on the behavior of a frequency reconfigurable antenna cluster

Hannula, Jari Matti; Holopainen, Jari; Viikari, Ville

2017 in Proceedings of the European Conference on Antennas and Propagation (IEEE)

ISBN: 9788890701870

ISSN: 2164-3342

Antenna tuning without physical matching elements (invited)

Hannula, Jari-Matti; Viikari, Ville; Saarinen, Tapio; Lehtovuori, Anu; Holopainen, Jari

2017

ISBN: 978-1-5386-1607-9/17

A study of 5G antennas in a mobile terminal

Holopainen, Jari; Hannula, Jari Matti; Viikari, Ville

2017 in Proceedings of the European Conference on Antennas and Propagation (IEEE)

ISBN: 9788890701870

ISSN: 2164-3342

RF-Powered Multi-Sensing Platform for RFID with Frequency Modulation

Islam, Mazidul; Song, Jinsong; Viikari, Ville; Nikunen, Joona

2017 in European Microwave Conference (European Microwave Association)

ISBN: 978-2-87487-043-9

ISSN: 2325-0305

Dielectric-filled waveguide antenna array for millimeter-wave communications

Kähkönen, Henri; Semkin, Vasilii; Ala-Laurinaho, Juha; Viikari, Ville

2017

ISBN: 9788890701870

ISSN: 2164-3342

Single-element handset antenna design for modern smartphones An industrial approach

Lehtovuori, Anu; Ilvonen, Janne; Rasilainen, Kimmo; Viikari, Ville

2017 in Proceedings of the European Conference on Antennas and Propagation (IEEE)

ISBN: 9788890701870

ISSN: 2164-3342

LTE handset antenna with closely-located radiators, low-band MIMO, and high efficiency

Rasilainen, Kimmo; Lehtovuori, Anu; Viikari, Ville

2017 in Proceedings of the European Conference on Antennas and Propagation (IEEE)

ISBN: 9788890701870

ISSN: 2164-3342

Uncertainty analysis of intermodulation-based antenna measurements

Hannula, Jari Matti; Viikari, Ville

2016 in Proceedings of the European Conference on Antennas and Propagation (Institute of Electrical and Electronics Engineers Inc.)

ISBN: 9788890701863

ISSN: 2164-3342

Suitable multiantenna placement in mobile handsets based on electromagnetic isolation

Ilvonen, Janne; Holopainen, Jari; Rasilainen, Kimmo; Lehtovuori, Anu; Viikari, Ville

2016 in Proceedings of the European Conference on Antennas and Propagation (Institute of Electrical and Electronics Engineers Inc.)

ISBN: 9788890701863

ISSN: 2164-3342

UHF RFID Sensors Based on Frequency Modulation

Islam, Md. Mazidul; Viikari, Ville; Nikunen, Joona; Reinikainen, Marko

2016 in Proceedings of IEEE Sensors (IEEE)

ISBN: 978-1-4799-8287-5

ISSN: 1930-0395

Mitigation of multiple reflections in antenna pattern retrieval method

Khairkar, Gaurav; Ala-Laurinaho, Juha; Viikari, Ville; Semkin, Vasilii; Räisänen, Antti

2016 in Proceedings of the European Conference on Antennas and Propagation (Institute of Electrical and Electronics Engineers Inc.)

ISBN: 9788890701863

ISSN: 2164-3342

Applying bandwidth estimators to tablet antenna design

Lehtovuori, Anu; Valkonen, Risto; Viikari, Ville

2016 in Proceedings of the European Conference on Antennas and Propagation (Institute of Electrical and Electronics Engineers Inc.)

ISBN: 9788890701863

ISSN: 2164-3342

Wideband monopole antenna for RF power scavenger

Leino, M. K.; Partanen, H.; Lindvall, N.; Luomaniemi, R.; Kangas, T.; Tzarouchis, D.; Holopainen, Jari; Viikari, V.

2016 in Digest of the IEEE Antennas and Propagation Society International Symposium (Institute of Electrical and Electronics Engineers Inc.)

ISBN: 9781509028863

ISSN: 1522-3965

Realization of RFID tag antenna with 3D printing technology

Naushahi, Shayan Hasan; Rasilainen, Kimmo; Viikari, Ville

2016 in Proceedings of the European Conference on Antennas and Propagation (Institute of Electrical and Electronics Engineers Inc.)

ISBN: 9788890701863

ISSN: 2164-3342

Effect of shape and surroundings on harmonic transponder performance

Rasilainen, Kimmo; Viikari, Ville

2016 in Proceedings of the European Conference on Antennas and Propagation (Institute of Electrical and Electronics Engineers Inc.)

ISBN: 9788890701863

ISSN: 2164-3342

Reflection coefficient method for antenna radiation pattern measurements

Ala-Laurinaho, Juha; Du, Zhou; Semkin, Vasilii; Viikari, Ville; Räisänen, Antti V.

2015

ISBN: 978-2-87487-041-5

Tunable MIMO Antenna for Small Handsets

Rasilainen, Kimmo; Lehtovuori, Anu; Ilvonen, Janne; Holopainen, Jari; Valkonen, Risto; Viikari, Ville

2015

ISBN: 978-88-907018-5-6

Dual-resonant PIFA for Body Area Networks

Salo, Sampo; Khairkar, Gaurav; Holopainen, Jari; Viikari, Ville

2015

ISBN: 978-1-4799-7815-1

Reflection coefficient method for characterizing antennas on probe stations

Viikari, Ville; Du, Zhou; Semkin, Vasilii; Ala-Laurinaho, Juha; Räisänen, Antti V.

2015

ISBN: 978-88-907018-5-6

Radiation pattern retrieval from impedance measurement with a reflective object in the antenna near field

Ala-Laurinaho, Juha; Du, Zhou; Viikari, Ville; Räisänen, Antti V.

2014

2D Antenna Radiation Pattern Retrieval Using Reflection Coefficient Measurement

Du, Zhou; Viikari, Ville; Ala-Laurinaho, Juha; Räisänen, Antti V.

2014

ISBN: 978-4-902339-32-1

Double loop matching technique for robust UHF RFID tag antennas

Heino, Mikko; Toivanen, Jalmari; Holopainen, Jari; Viikari, Ville

2014

Achieving Long Reading Ranges with Passive Wireless Intermodulation Sensors

Pursula, Pekka; Pesonen, Nadine; Song, Jinsong; Viikari, Ville; Marttila, Ilkka

2014

Investigation on Bendable Mobile Devices in the Presence of the User

Rasilainen, Kimmo; Ilvonen, Janne; Viikari, Ville

2014

Long Range Passive Wireless MEMS-based Inclination or Acceleration Sensor Utilizing the Intermodulation Communication Principle

Song, Jinsong; Pesonen, Nadine; Viikari, Ville

2014

ISBN: 978-1-4799-3403-4

Integrated Passive Wireless Sensor Transponders based on the Intermodulation Communication Principle

Song, Jinsong; Pesonen, Nadine; Pursula, Pekka; Viikari, Ville

2014

RFID-based butterfly location sensing system

Särkkä, Simo; Viikari, Ville; Jaakkola, Kaarle

2014 in European Signal Processing Conference (European Signal Processing Conference, EUSIPCO)

ISBN: 9780992862619

ISSN: 2076-1465

Review of Passive Wireless Sensors Utilizing the Intermodulation Communication

Viikari, Ville; Song, Jinsong; Pesonen, Nadine; Pursula, Pekka; Seppä, Heikki

2014

On the use of the intermodulation communication towards zero power sensor nodes

Song, J.; Pesonen, N.; Seppä, H.; Viikari, Ville

2013 in European Microwave Conference (European Signal Processing Conference, EUSIPCO)

ISBN: 978-2-87487-031-6

ISSN: 2325-0305

Tests of a 1.5-m reflector antenna in a 650 GHz hologram CATR

Ala-Laurinaho, Juha; Häkli, Janne; Karttunen, Aki; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Noponen, Eero; tamminen, Aleksi; Vaaja, Matti; Viikari, Ville; Räisänen, Antti V.; Lemanczyk, Jerzy

2007

Antenna tests at 650 GHz in a CATR based on a hologram

Häkli, Janne; Koskinen, Tomi; Lönnqvist, Anne; Ala-Laurinaho, Juha; Viikari, Ville; Karttunen, Aki; Vaaja, Matti; Mallat, Juha; Tamminen, Aleksi; Noponen, Eero; Räisänen, Antti V.

2007

Differential phase measurement method for determining scanner planarity at submillimeter wavelengths

Koskinen, Tomi; Mallat, Juha; Ala-Laurinaho, Juha; Vaaja, Matti; Karttunen, Aki; Viikari, Ville; Räisänen, Antti V.

2007

How to test a high-gain antenna at THz frequencies?

Räisänen, Antti V.; Ala-Laurinaho, Juha; Häkli, Janne; Karttunen, Aki; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Noponen, Eero; Tamminen, Aleksi; Vaaja, Matti; Viikari, Ville

2007

Measurement of a high-gain antenna at 650 GHz in a hologram-based CATR

Räisänen, Antti V.; Ala-Laurinaho, Juha; Häkli, Janne; Karttunen, Aki; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Noponen, Eero; Tamminen, Aleksi; Vaaja, Matti; Viikari, Ville

2007

Compact antenna test range based on a computer-generated hologram and its use at submillimeter wavelengths

Räisänen, Antti V.; Ala-Laurinaho, Juha; Häkli, Janne; Karttunen, Aki; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Noponen, Eero; Tamminen, Aleksi; Vaaja, Matti; Viikari, Ville

2007

Hologram-based CATR measurement of a 1.5 m antenna at 650 GHz: progress report

Ala-Laurinaho, Juha; Häkli, Janne; Karttunen, Aki; Koskinen, Tomi; Lönnqvist, Anne; Noponen, Eero; Mallat, Juha; Vaaja, Matti; Viikari, Ville; Räisänen, Antti V.; Lemanczyk, Jerzy

2006

Development of a hologram-based CATR for testing a very high gain antenna at 650GHz

Ala-Laurinaho, Juha; Koskinen, Tomi; Häkli, Janne; Karttunen, Aki; Lönnqvist, Anne; Noponen, Eero; Mallat, Juha; Vaaja, Matti; Viikari, Ville; Räisänen, Antti V.; Heinonen, Jukka; Hautala, Pekka; Lemanczyk, Jerzy

2006

ISBN: 92-9092-9375

ISSN: 1609-042X

Development of a 650 GHz hologram based CATR for testing a 1,5m reflector antenna

Häkli, Janne; Koskinen, Tomi; Ala-Laurinaho, Juha; Karttunen, Aki; Vaaja, Matti; Viikari, Ville; Lönnqvist, Anne; Heinonen, J.; Mallat, Juha; Noponen, Eero; Hautala, P.; Räisänen, Antti V.

2006

Reduction of cross-polarization in sub-millimetre-wave hologram-based CATR by using a polarization grid

Koskinen, Tomi; Häkli, Janne; Ala-Laurinaho, Juha; Lönnqvist, Anne; Mallat, Juha; Viikari, Ville; Räisänen, Antti V.

2006

Synthesis of reflection-type phase hologram for compact antenna test range at 310 GHz

Noponen, Eero; Häkli, Janne; Lönnqvist, Anne; Viikari, Ville; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti V.

2006

Measurement of high-gain antennas at mm- and submm-wavelenghts: challenges and solutions

Räisänen, Antti V.; Ala-Laurinaho, Juha; Häkli, Janne; Karttunen, Aki; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Noponen, Eero; Vaaja, Matti; Viikari, Ville

2006

Adaptive array based antenna pattern correction technique

Viikari, Ville; Kolmonen, Veli-Matti; Salo, Jari; Räisänen, Antti V.

2006

New pattern correction techniques for submm-wave CATRs

Viikari, Ville; Mallat, Juha; Ala-Laurinaho, Juha; Häkli, Janne; Karttunen, Aki; Koskinen, Tomi; Lönnqvist, Anne; Noponen, Eero; Vaaja, Matti; Räisänen, Antti V.

2006

Millimetre wave antenna research at Helsinki University of Technology

Ala-Laurinaho, Juha; Mallat, Juha; Häkli, Janne; Koskinen, Tomi; Lönnqvist, Anne; Viikari, Ville; Möttönen, Ville; Dudorov, Sergey; Lioubtchenko, Dmitri; Lehto, Arto; Räisänen, Antti V.

2005

Dielectric-loaded flat reflector test antenna for submillimetre wavelengths

Ala-Laurinaho, Juha; Mallat, Juha; Viikari, Ville; Räisänen, Antti V.

2005

Mm- and sub-mm wave hologram based compact antenna test ranges used for electrical antenna testing

Häkli, Janne; Ala-Laurinaho, Juha; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Viikari, Ville; Säily, Jussi; Räisänen, Antti V.; Tuovinen, Jussi; Lemanczyk, Jerzy

2005

A reflection-type amplitude hologram as a collimating element in the compact antenna test range

Koskinen, Tomi; Viikari, Ville; Häkli, Janne; Lönnqvist, Anne; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti V.

2005

Study on the dual polarized operation of the hologram based compact antenna test range

Koskinen, Tomi; Häkli, Janne; Ala-Laurinaho, Juha; Lönnqvist, Anne; Viikari, Ville; Mallat, Juha; Räisänen, Antti V.

2005

Hologram based compact ranges for antenna and RCS testing at submm-waves

Lönnqvist, Anne; Ala-Laurinaho, Juha; Häkli, Janne; Mallat, Juha; Viikari, Ville; Räisänen, Antti V.

2005

Antenna pattern correction in a hologram CATR based on averaging in frequency domain

Viikari, Ville; Mallat, Juha; Ala-Laurinaho, Juha; Häkli, Janne; Räisänen, Antti V.

2005

A feasibility study of phase retrieval algorithms at sub-millimeter wavelengths

von Lerber, Annakaisa; Viikari, Ville; Lisena, Angelo; Ala-Laurinaho, Juha; Räisänen, Antti V.

2005

Satellite antenna measurement at 322GHz

Ala-Laurinaho, Juha; Häkli, Janne; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Räisänen, Antti V.; Ranvier, Sylvain; Säily, Jussi; Tuovinen, Jussi; Viikari, Ville

2004

Sub-mm antenna tests in a hologram based CATR

Häkli, Janne; Ala-Laurinaho, Juha; Koskinen, Tomi; Lemanczyk, Jerzy; Lönnqvist, Anne; Mallat, Juha; Räisänen, Antti V.; Säily, Jussi; Tuovinen, Jussi; Viikari, Ville

2004

Dielectric-loaded flat reflector test antenna for submillimetre wave antenna measurements

Mallat, Juha; Ala-Laurinaho, Juha; Viikari, Ville; Räisänen, Antti V.

2004

Computer-generated hologram and its use for submm-wave antenna antenna measurement

Räisänen, Antti V.; Ala-Laurinaho, Juha; Koskinen, tomi; Lönnqvist, Anne; Säily, Jussi; Häkli, Janne; Mallat, Juha; Viikari, Ville; Ranvier, Sylvain; Tuovinen, Jussi

2004

A feed scanning based APC-technique for improving the measurement accuracy in a sub-mm CATR

Viikari, Ville; Häkli, Janne; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti

2004

Tests of the ADMIRALS antenna in a hologram compact antenna test range

Ala-Laurinaho, Juha; Häkli, Janne; Koskinen, Tomi; Lönnqvist, Anne; Mallat, Juha; Ranvier, Sylvain; Räisänen, Antti V.; Tuovinen, Jussi; Viikari, Ville

2003

Phase hologram for plane wave generation at 310 GHz

Noponen, Eero; Viikari, Ville; Lönnqvist, Anne; Säily, Jussi; Häkli, Janne; Koskinen, Tomi; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti V.; Salo, Janne; Meltaus, Johanna; Salomaa, Martti M.

2003

Phase-type diffractive element for planar millimeter-wave generation at 310 GHz

Noponen, Eero; Lönnqvist, Anne; Säily, Jussi; Häkli, Janne; Koskinen, Tomi; Viikari, Ville; Ala-Laurinaho, Juha; Mallat, Juha; Räisänen, Antti V.; Salo, Janne; Meltaus, Johanna; Salomaa, Martti M.

2003

Manufacturing of large-sized holograms for a submm-wave CATR

Lönnqvist, Anne; Ala-Laurinaho, Juha; Häkli, Janne; Koskinen, Tomi; Viikari, Ville; Säily, Jussi; Mallat, Juha; Tuovinen, Jussi; Räisänen, Antti V.

2002

A phase hologram RCS range for scale model measurements

Mallat, Juha; Ala-Laurinaho, Juha; Noponen, Eero; Viikari, Ville; Lönnqvist, Anne; Koskinen, Tomi; Säily, Jussi; Häkli, Janne; Meltaus, Johanna; Räisänen, Antti V.

2002

Effects of hologram joints to the quiet-zone field in a CATR

Lönnqvist, Anne; Ala-Laurinaho, Juha; Häkli, Janne; Koskinen, Tomi; Viikari, Ville; Säily, Jussi; Tuovinen, Jussi; Räisänen, Antti V.

2001

Computer generated holograms for mm- and submm-wave applications: CATR, Bessel beams and radiowave vortices

Räisänen, Antti V.; Ala-Laurinaho, Juha; Säily, Jussi; Häkli, Janne; Koskinen, Tomi; Lönnqvist, Anne; Viikari, Ville; Mallat, Juha; Noponen, Eero; Salo, Janne; Meltaus, Johanna; Weber, M.; Salomaa, M.M.

2001