Zobrazeno 1 - 10
of 205
pro vyhledávání: '"Kunio Sakakibara"'
Autor:
Chatchai Chokchai, Yoshiki Sugimoto, Kunio Sakakibara, Makoto Yamazaki, Henry Abu Diawuo, Nobuyoshi Kikuma
Publikováno v:
IEEE Journal of Microwaves, Vol 4, Iss 3, Pp 537-547 (2024)
This paper proposes a broadband single-ended line-to-waveguide transition that covers the 240–300 GHz band. The transition comprises a tapered grounded coplanar waveguide (GCPW) feed line, inserted from the narrow wall of the waveguide exciting a m
Externí odkaz:
https://doaj.org/article/057d03bb396647ef93896c4c61d7efe6
Publikováno v:
IEEE Access, Vol 12, Pp 49804-49816 (2024)
A broadband waveguide-to-differential-line transition with a triple stacked patch is proposed for use in 300 GHz band. This transition consists of differential signal lines inserted into the waveguide region from both broad walls of the waveguide. A
Externí odkaz:
https://doaj.org/article/e4bcb4591f7d4b83b1f2743cc37e9380
Publikováno v:
IEEE Access, Vol 12, Pp 10497-10511 (2024)
Multibeam base station antennas are introduced for 5G and 6G mobile communication systems. Considering higher frequency bands such as millimeter waves for 5G and terahertz for 6G, dielectric lens antennas become promising candidates due to their simp
Externí odkaz:
https://doaj.org/article/c8c07005f68b4dceb3fa5e66cbe255bd
Autor:
Bazilah Baharom, Yoshiki Sugimoto, Bakar Rohani, Kunio Sakakibara, Nobuyoshi Kikuma, Yoshihide Yamada, Nurul Huda Abd Rahman
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 1074-1086 (2023)
A $2\times2$ lens array provides a half reduction of antenna height compared to the twice-diameter single-feed lens antenna with an almost similar gain performance due to the same aperture size. However, it generally suffers from a non-uniform amplit
Externí odkaz:
https://doaj.org/article/d28bb211a9e74a1f89094428cc52dd8e
Autor:
Bazilah Baharom, Ryota Ishihara, Yoshiki Sugimoto, Kunio Sakakibara, Nobuyoshi Kikuma, Takayuki Arai, Takayoshi Suganuma, Tomohiro Saito
Publikováno v:
IEEE Access, Vol 11, Pp 8481-8491 (2023)
This study proposes a dielectric lens antenna that implements an impedance matching layer comprising square-pillar periodic structures on the lens surface to reduce the surface reflection formed in the lens from a high-permittivity dielectric materia
Externí odkaz:
https://doaj.org/article/74ecc409c8c548f6831287da0f20fc22
Millimeter-Wave Butler Matrix Beamforming Circuit Using Finline in Double-Layer Dielectric Substrate
Autor:
Nguyen Thanh Tuan, Kunio Sakakibara, Kojiro Iwasa, Takeshi Okunaga, Nobuyoshi Kikuma, Yoshiki Sugimoto
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 1, Pp 579-589 (2020)
This article presents a new kind of finline in double-layer dielectric substrate and its beamforming circuit of Butler matrix in the millimeter-wave band. The finline is constructed by inserting a slotline between two dielectric substrate layers. In
Externí odkaz:
https://doaj.org/article/971ae0f954724434b8e3c2bb55de78fa
Publikováno v:
IEEE Access, Vol 7, Pp 161385-161393 (2019)
This paper presents a design technique to achieve a broadband planar microstrip-to-waveguide transition in a millimeter-wave (mmWave) band. In the conventional planar microstrip-to-waveguide transition, via holes are located around the rectangular wa
Externí odkaz:
https://doaj.org/article/d5b8a8256363436da834b5df1e3956c3
Publikováno v:
International Journal of Antennas and Propagation, Vol 2016 (2016)
Low profile and simple configuration are advantageous for RF module in passive millimeter-wave imaging system. High sensitivity over broad operation bandwidth is also necessary to detect right information from weak signal. We propose a broadband laye
Externí odkaz:
https://doaj.org/article/2ebb9c1eb9e142f69da93f89bacd83bc
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. :1-9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56ec5dd6c74a2cc30bde3fdc6f84c751
https://doi.org/10.1109/tmtt.2022.3232501
https://doi.org/10.1109/tmtt.2022.3232501
Autor:
Shinsuke Hara, Ruibing Dong, Sangyeop Lee, Kyoya Takano, Naoya Toshida, Akifumi Kasamatsu, Kunio Sakakibara, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
Publikováno v:
IEEE Journal of Solid-State Circuits. 57:2988-2998
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a4fda9f9cc8e64463da4c76b4641a5b
https://doi.org/10.1109/jssc.2022.3179560
https://doi.org/10.1109/jssc.2022.3179560