This map shows the geographic impact of Isao Ohta's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Isao Ohta with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Isao Ohta more than expected).
This network shows the impact of papers produced by Isao Ohta. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Isao Ohta. The network helps show where Isao Ohta may publish in the future.
Co-authorship network of co-authors of Isao Ohta
This figure shows the co-authorship network connecting the top 25 collaborators of Isao Ohta.
A scholar is included among the top collaborators of Isao Ohta based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Isao Ohta. Isao Ohta is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Kishihara, Mitsuyoshi, et al.. (2014). Fabrication of 180 GHz PTFE-filled waveguide and its bandpass filters by SR direct etching. Asia-Pacific Microwave Conference.1 indexed citations
2.
Kishihara, Mitsuyoshi, et al.. (2014). Analysis of coupled-trough-waveguide based on E-plane planar circuit approach. Asia-Pacific Microwave Conference. 834–836.1 indexed citations
3.
Kawai, Tadashi, Akira Enokihara, Isao Ohta, et al.. (2013). Parallel ring-lines type rat-race circuit for loose coupling utilizing composite right-/left-handed transmission lines. European Microwave Conference. 298–301.1 indexed citations
4.
Kawai, Tadashi, et al.. (2013). Design of Parallel Ring-Lines Type Rat-Race Circuit with Loose Coupling Utilizing Short-Circuited Coupled lines. 113(365). 19–22.
5.
Kishihara, Mitsuyoshi, H. Kido, Akinobu Yamaguchi, Yuichi Utsumi, & Isao Ohta. (2013). Trial Fabrication of 180 GHz-Band PTFE-Filled Waveguide by SR Etching and Its Evaluation. 113(141). 103–108.1 indexed citations
6.
Ohta, Isao, et al.. (2012). H-Plane Waveguide Multiple Power Divider/Combiner of Chain Structure. IEICE Technical Report; IEICE Tech. Rep.. 112(251). 65–70.1 indexed citations
7.
Kawai, Tadashi, et al.. (2011). Broadband design method of SIW directional couplers. 1–4.10 indexed citations
8.
Kawai, Tadashi, et al.. (2011). Design of TE 10 -TE 30 mode transducer using H-plane waveguide corner. Asia-Pacific Microwave Conference. 407–410.3 indexed citations
Kawai, Tadashi, et al.. (2004). Photonic crystal waveguides with inner metal coated posts at millimeter-wave frequency range. European Microwave Conference. 3. 1137–1140.1 indexed citations
17.
Kishihara, Mitsuyoshi, et al.. (2003). Asymmetrical Coupled-HNRD-Guide Directional Couplers with Flat Coupling. IEICE Transactions on Electronics. 86(2). 126–133.1 indexed citations
Ohta, Isao, et al.. (1988). A rat-race-type directional coupler for loose coupling. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 71(4). 304–306.2 indexed citations
20.
Ohta, Isao & Kazuhiko Fukui. (1977). Asymmetrical parallel running of two oscillators. 60. 67–76.1 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.