Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
A design of the low-pass filter using the novel microstrip defected ground structure
This map shows the geographic impact of Dal Ahn'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 Dal Ahn with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Dal Ahn more than expected).
This network shows the impact of papers produced by Dal Ahn. 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 Dal Ahn. The network helps show where Dal Ahn may publish in the future.
Co-authorship network of co-authors of Dal Ahn
This figure shows the co-authorship network connecting the top 25 collaborators of Dal Ahn.
A scholar is included among the top collaborators of Dal Ahn 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 Dal Ahn. Dal Ahn is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ahn, Dal, et al.. (2012). A new equivalent circuit model for RF microstrip disk resonator. International Conference on Signal Processing. 43–46.1 indexed citations
10.
Lim, Jong‐Sik, et al.. (2012). Design of Size-Reduced Power Dividers using the Transmission Line with Defected Microstrip Structure. The Journal of Korean Institute of Information Technology. 10(7). 63–69.1 indexed citations
11.
Lim, Jong‐Sik, et al.. (2009). A Method for Calculating the Characteristic Impedance of Substrate Integrated Artificial Dielectric Transmission Lines. The Transactions of The Korean Institute of Electrical Engineers. 58(8). 1585–1591.
12.
Lim, Jong‐Sik, et al.. (2008). A New Wire Bonding Technique for High Power Package Transistor. The Transactions of The Korean Institute of Electrical Engineers. 57(4). 653–659.1 indexed citations
13.
Ahn, Dal, et al.. (2007). A Development of Remote Control System using PDA based WINDOWS CE .NET. Journal of the Korea Academia-Industrial cooperation Society. 8(6). 1480–1490.1 indexed citations
14.
Kim, Chul-Soo, et al.. (2005). A New Type of 5-Pole Low Pass Filter Using Defected Ground Structure. The Journal of Korean Institute of Electromagnetic Engineering and Science. 16(6). 594–602.
15.
Park, Kyu‐Ho, et al.. (2005). A new equivalent transmission line modeling of dumbbell type defected ground structure. 3.2 indexed citations
16.
Lim, Jong‐Sik, Chul-Soo Kim, Yongchae Jeong, Dal Ahn, & Sangwook Nam. (2004). An advanced equivalent circuit of spiral-shaped defected ground structure. European Microwave Conference. 3. 1357–1360.2 indexed citations
17.
Lim, Jong‐Sik, Yongchae Jeong, Dal Ahn, & Sangwook Nam. (2004). Improvement in Performance of Power Amplifiers by Defected Ground Structure. IEICE Transactions on Electronics. 87(1). 52–59.6 indexed citations
18.
Lim, Jong‐Sik, Yongchae Jeong, Dal Ahn, & Sangwook Nam. (2003). A Technique for Reducing the Size of Microwave Amplifiers using Spiral-Shaped Defected Ground Structure. The Journal of Korean Institute of Electromagnetic Engineering and Science. 14(9). 904–911.5 indexed citations
19.
Park, Jun‐Seok, et al.. (2001). Design of A Microwave Planar Broadband Power Divider. The Journal of Korean Institute of Electromagnetic Engineering and Science. 12(4). 651–658.1 indexed citations
20.
Kim, Chul-Soo, et al.. (1999). A Design of 3 dB Power Divider using Slow-wave Characteristic. The Journal of Korean Institute of Electromagnetic Engineering and Science. 10(5). 694–700.4 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.