Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Leinonen, M. E. (Marko E.)"'
Autor:
Rasilainen, K. (Kimmo), Leinonen, M. E. (Marko E.), Nokandi, M. J. (Mostafa Jafari), Chen, J. (Jiangcheng), Nevala, K. (Klaus), Rahkonen, T. (Timo), Pärssinen, A. (Aamo)
Moving to sub-THz frequencies introduces new challenges for wireless communications systems in terms of design, implementation, and testing. This paper presents a measurement technique for over-the-air (OTA) characterisation of sub-THz antennas at WR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::8dbbb34856de1ee8a8fa8250ff768119
http://urn.fi/urn:nbn:fi-fe2023062057048
http://urn.fi/urn:nbn:fi-fe2023062057048
Autor:
Javed, M. Y. (Muhammad Yasir), Tervo, N. (Nuutti), Leinonen, M. E. (Marko E.), Pärssinen, A. (Aarno)
As relative bandwidth increases, beam squint, i.e., frequency dependent directivity, limits the wideband performance of phase-shifter steered arrays. This effect is already notable in 5G systems operating at 28 GHz and above with 400/800 MHz bandwidt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::185225c5274d9cf4b4c21d9d91d12db7
http://urn.fi/urn:nbn:fi-fe2023033033908
http://urn.fi/urn:nbn:fi-fe2023033033908
Autor:
Jokinen, M. (Markku), Sethi, A. (Alok), Kursu, O. (Olli), Rahkonen, T. (Timo), Leinonen, M. E. (Marko E.), Pärssinen, A. (Aamo)
An iterative calibration method of 5G mmW vector- sum phase shifter (VSPS) is presented in this paper. The phase and amplitude imbalances of I and Q branches can be tuned. The phase is adjusted with a tunable polyphase filter (PPF) by changing its re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::a404099b25b8db4b1e9163211ba77f0e
http://urn.fi/urn:nbn:fi-fe2023070690325
http://urn.fi/urn:nbn:fi-fe2023070690325
Autor:
Phan, D. T. (Duy Tung), Chen, J. (Jiangcheng), Leinonen, M. E. (Marko E.), Pärssinen, A. (Aarno), Soh, P. J. (Ping Jack)
The sixth generation (6G) communications is expected to involve the use of the sub-Terahertz. Electromagnetic waves in this band is vulnerable to blockages by physical obstacles, besides the severe limitation of coverage area compared to in conventio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::ab38097fe5c6f4f2de2d9fdefe6cbb8c
http://urn.fi/urn:nbn:fi-fe2023061555590
http://urn.fi/urn:nbn:fi-fe2023061555590
Autor:
Montaseri, M. H. (Mohammad Hassan), Singh, S. P. (Sumit Pratap), Jokinen, M. (Markku), Rahkonen, T. (Timo), Leinonen, M. E. (Marko E.), Pärssinen, A. (Aarno)
This paper presents a wideband vector modulator phase shifter measured at frequency bands reaching and ever surpassing the f t of the technology for 6G beamforming for extremely high data rate applications. The circuit is designed based on 130nm SiGe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::2f76fbcdbf59c45f4299a19ee9869958
http://urn.fi/urn:nbn:fi-fe2023040535140
http://urn.fi/urn:nbn:fi-fe2023040535140
Autor:
Pärssinen, A. (Aarno), Alouini, M.-S. (Mohamed-Slim), Berg, M. (Markus), Kürner, T. (Thomas), Kyösti, P. (Pekka), Leinonen, M. E. (Marko E.), Matinmikko-Blue, M. (Marja), McCune, E. (Earl), Pfeiffer, U. (Ullrich), Wambacq, P. (Piet)
Executive summary Many visions of 6G and the evolution of data rates in wireless systems in general are directing their vectors toward Tbps communications by 2030. This target, with the important goal of sustainable development in the future world, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::94babc69fc73f1856306056cb1096387
http://urn.fi/urn:isbn:9789526228419
http://urn.fi/urn:isbn:9789526228419
Autor:
Singh, S. P. (Sumit Pratap), Rahkonen, T. (Timo), Leinonen, M. E. (Marko E.), Pärssinen, A. (Aarno)
This paper presents the design of a low noise amplifier (LNA) operating at center frequency 290 GHz in 130 nm SiGe BiCMOS technology with ft/fmax of 300 GHz/450 GHz. The LNA consists of four stages of pseudo-differential cascode topology. Each stage
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::9af681181a66bc0a32a56cb19de40d0c
http://urn.fi/urn:nbn:fi-fe2021081843552
http://urn.fi/urn:nbn:fi-fe2021081843552
Autor:
Javed, M. Y. (Muhammad Yasir), Tervo, N. (Nuutti), Leinonen, M. E. (Marko E.), Pärssinen, A. (Aarno)
This article proposes a systematic approach for stacking uniform linear arrays (ULAs) of different sizes to reduce sidelobes and form nulls to the radiated beam pattern. In sidelobe reduction, the nulls and sidelobes of the vertically stacked ULAs ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::e1274e5fe49388f08af83a2040910c7e
http://urn.fi/urn:nbn:fi-fe2021101150550
http://urn.fi/urn:nbn:fi-fe2021101150550
Autor:
Rikkinen, K. (Kari), Kyösti, P. (Pekka), Leinonen, M. E. (Marko E.), Berg, M. (Markus), Pärssinen, A. (Aarno)
How well do upper millimeter-wave and terahertz frequency bands enable wireless communications? In this work, we approximate the current and estimate the future communication potential with emphasis on antenna and radio frequency hardware technologie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::087cce3e6d4e5fba4318d5418f2a0c5d
http://urn.fi/urn:nbn:fi-fe2020120399188
http://urn.fi/urn:nbn:fi-fe2020120399188
Large antenna arrays used for compensating the millimeter wave (mmW) path loss gives interesting perspectives for considering out-of-band emissions and reception signals to be direction dependent. In addition, co-existence of lower frequency and mm W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::80eedaa13ef2e0ee6cb8e615e736e053
http://urn.fi/urn:nbn:fi-fe2018121751023
http://urn.fi/urn:nbn:fi-fe2018121751023