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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Electronics and Electrical Engineering 38 4958 4759 93 92 342 5347

Kai-Da Xu publications per year

The chart shows the history of publications by Kai-Da Xu between 2009 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Kai-Da Xu published across 18 years, from 2009 to 2026, averaging 24.2 papers a year. Output peaked at 79 publications in 2024. 76 of the 436 publications appeared in the last two years.

No. of publications
25 50 75
Bar chart. Horizontal axis: year, 2009 to 2026. Vertical axis: number of publications, 0 to 79. Peak 79 publications in 2024. 2009: 1 publication 2010: 0 publications 2011: 2 publications 2012: 2 publications 2013: 5 publications 2014: 9 publications 2015: 13 publications 2016: 19 publications 2017: 24 publications 2018: 29 publications 2019: 27 publications 2020: 23 publications 2021: 44 publications 2022: 31 publications 2023: 52 publications 2024: 79 publications 2025: 75 publications 2026: 1 publication
2009 2026

436 publications in total across all disciplines

View publications per year as a table
Kai-Da Xu: publications per year, 2009 to 2026
Year Publications
2009 1
2010 0
2011 2
2012 2
2013 5
2014 9
2015 13
2016 19
2017 24
2018 29
2019 27
2020 23
2021 44
2022 31
2023 52
2024 79
2025 75
2026 1
Total 436
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Kai-Da Xu publications per year - data summary

  • Kai-Da Xu, a Electronics and Electrical Engineering scholar from University of Alcalá, has 436 publications recorded across 18 years, from 2009 to 2026.
  • The oldest publication on record dates to 2009 and the most recent to 2026.
  • The most productive year is 2024, with 79 publications.
  • The least productive years with any output are 2009 and 2026, with 1 publication each.
  • 1 of the 18 years in the span carries no publications at all (2010).
  • The rate of publication averages 24.2 papers per year over the whole span, or 25.6 per year counting only the 17 years with at least one publication.
  • The last 5 years on the chart (2022-2026) hold 238 publications, 55% of the career total.
  • Split into equal eras - 2009-2014: 19 publications (3.2 per year); 2015-2020: 135 publications (22.5 per year); 2021-2026: 282 publications (47.0 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Kai-Da Xu publication distribution in Electronics and Electrical Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Electronics and Electrical Engineering in 2026. The highlighted bar marks where Kai-Da Xu sits on this spectrum.

No. of scientists
100 200 300 400
Bar chart with 53 bars. Horizontal axis: publications, 34–53 to 1,065+. Vertical axis: number of scientists, 0 to 445. Most scientists, 445, have 174–193 publications. The last bar groups every scientist with 1,065 publications or more. The highlighted bar, 334–353 publications, is where this scientist sits. 34–53 publications: 24 scientists 54–73 publications: 52 scientists 74–93 publications: 114 scientists 94–113 publications: 203 scientists 114–133 publications: 269 scientists 134–153 publications: 355 scientists 154–173 publications: 403 scientists 174–193 publications: 445 scientists 194–213 publications: 430 scientists 214–233 publications: 431 scientists 234–253 publications: 399 scientists 254–273 publications: 366 scientists 274–293 publications: 335 scientists 294–313 publications: 300 scientists 314–333 publications: 276 scientists 334–353 publications: 250 scientists 354–373 publications: 214 scientists 374–393 publications: 187 scientists 394–413 publications: 152 scientists 414–433 publications: 169 scientists 434–453 publications: 147 scientists 454–473 publications: 111 scientists 474–493 publications: 117 scientists 494–513 publications: 103 scientists 514–533 publications: 99 scientists 534–553 publications: 92 scientists 554–573 publications: 75 scientists 574–593 publications: 58 scientists 594–613 publications: 69 scientists 614–633 publications: 50 scientists 634–653 publications: 62 scientists 654–673 publications: 54 scientists 674–693 publications: 44 scientists 694–713 publications: 37 scientists 714–733 publications: 28 scientists 734–753 publications: 26 scientists 754–773 publications: 26 scientists 774–793 publications: 19 scientists 794–813 publications: 23 scientists 814–833 publications: 20 scientists 834–853 publications: 16 scientists 854–873 publications: 20 scientists 874–893 publications: 11 scientists 894–913 publications: 11 scientists 914–933 publications: 16 scientists 934–953 publications: 13 scientists 954–973 publications: 10 scientists 974–993 publications: 11 scientists 994–1,013 publications: 9 scientists 1,014–1,033 publications: 9 scientists 1,034–1,053 publications: 10 scientists 1,054–1,064 publications: 6 scientists 1,065+ publications: 99 scientists
34–53 publications 1,065+

This scientist: 342 publications — 66th percentile

66% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,065 publications or more.

View publications distribution as a table
Number of Electronics and Electrical Engineering scientists by publication count, Research.com 2026 ranking edition. Based on 6,875 ranked scientists.
Publications Scientists This scientist
34–53 24
54–73 52
74–93 114
94–113 203
114–133 269
134–153 355
154–173 403
174–193 445
194–213 430
214–233 431
234–253 399
254–273 366
274–293 335
294–313 300
314–333 276
334–353 250 342
354–373 214
374–393 187
394–413 152
414–433 169
434–453 147
454–473 111
474–493 117
494–513 103
514–533 99
534–553 92
554–573 75
574–593 58
594–613 69
614–633 50
634–653 62
654–673 54
674–693 44
694–713 37
714–733 28
734–753 26
754–773 26
774–793 19
794–813 23
814–833 20
834–853 16
854–873 20
874–893 11
894–913 11
914–933 16
934–953 13
954–973 10
974–993 11
994–1,013 9
1,014–1,033 9
1,034–1,053 10
1,054–1,064 6
1,065+ 99
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Kai-Da Xu publication distribution in Electronics and Electrical Engineering in 2026 - data summary

  • The chart plots the publication count of all 6,875 Electronics and Electrical Engineering scientists ranked by Research.com in 2026, grouped into 53 ranges running from 34–53 to 1,065+ publications.
  • Kai-Da Xu, a Electronics and Electrical Engineering scholar from University of Alcalá, records 342 publications - the 66th percentile of the discipline.
  • 66% of ranked Electronics and Electrical Engineering scientists score the same or lower than Kai-Da Xu, and about 34% score higher.
  • The median of the discipline falls in the 254–273 publications range, and Kai-Da Xu ranks above the median.
  • The most crowded range is 174–193 publications, holding 445 scientists (6% of the field).
  • 60% of the field sits in the lowest quarter of the value range (up to 294–313 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 1,065 publications or more, 99 scientists in all (1% of the field).

Kai-Da Xu D-index placement in Electronics and Electrical Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Electronics and Electrical Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Kai-Da Xu sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 82 bars. Horizontal axis: D-Index, 30 to 111+. Vertical axis: number of scientists, 0 to 263. Most scientists, 263, have 32 D-Index. The last bar groups every scientist with 111 D-Index or more. The highlighted bar, 38 D-Index, is where this scientist sits. 30 D-Index: 178 scientists 31 D-Index: 257 scientists 32 D-Index: 263 scientists 33 D-Index: 262 scientists 34 D-Index: 244 scientists 35 D-Index: 236 scientists 36 D-Index: 211 scientists 37 D-Index: 220 scientists 38 D-Index: 214 scientists 39 D-Index: 214 scientists 40 D-Index: 205 scientists 41 D-Index: 187 scientists 42 D-Index: 194 scientists 43 D-Index: 201 scientists 44 D-Index: 155 scientists 45 D-Index: 189 scientists 46 D-Index: 148 scientists 47 D-Index: 160 scientists 48 D-Index: 134 scientists 49 D-Index: 130 scientists 50 D-Index: 141 scientists 51 D-Index: 156 scientists 52 D-Index: 108 scientists 53 D-Index: 130 scientists 54 D-Index: 112 scientists 55 D-Index: 97 scientists 56 D-Index: 111 scientists 57 D-Index: 102 scientists 58 D-Index: 108 scientists 59 D-Index: 120 scientists 60 D-Index: 103 scientists 61 D-Index: 93 scientists 62 D-Index: 92 scientists 63 D-Index: 74 scientists 64 D-Index: 77 scientists 65 D-Index: 73 scientists 66 D-Index: 64 scientists 67 D-Index: 69 scientists 68 D-Index: 60 scientists 69 D-Index: 39 scientists 70 D-Index: 57 scientists 71 D-Index: 59 scientists 72 D-Index: 46 scientists 73 D-Index: 49 scientists 74 D-Index: 38 scientists 75 D-Index: 35 scientists 76 D-Index: 32 scientists 77 D-Index: 35 scientists 78 D-Index: 31 scientists 79 D-Index: 22 scientists 80 D-Index: 34 scientists 81 D-Index: 31 scientists 82 D-Index: 34 scientists 83 D-Index: 23 scientists 84 D-Index: 18 scientists 85 D-Index: 30 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 20 scientists 89 D-Index: 8 scientists 90 D-Index: 17 scientists 91 D-Index: 7 scientists 92 D-Index: 14 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 12 scientists 97 D-Index: 10 scientists 98 D-Index: 10 scientists 99 D-Index: 12 scientists 100 D-Index: 16 scientists 101 D-Index: 5 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 8 scientists 105 D-Index: 9 scientists 106 D-Index: 13 scientists 107 D-Index: 4 scientists 108 D-Index: 5 scientists 109 D-Index: 10 scientists 110 D-Index: 8 scientists 111+ D-Index: 96 scientists
30 D-Index 111+

This scientist: 38 D-Index — 30th percentile

30% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 111 D-Index or more.

View D-Index distribution as a table
Number of Electronics and Electrical Engineering scientists by D-index, Research.com 2026 ranking edition. Based on 6,875 ranked scientists.
D-Index Scientists This scientist
30 178
31 257
32 263
33 262
34 244
35 236
36 211
37 220
38 214 38
39 214
40 205
41 187
42 194
43 201
44 155
45 189
46 148
47 160
48 134
49 130
50 141
51 156
52 108
53 130
54 112
55 97
56 111
57 102
58 108
59 120
60 103
61 93
62 92
63 74
64 77
65 73
66 64
67 69
68 60
69 39
70 57
71 59
72 46
73 49
74 38
75 35
76 32
77 35
78 31
79 22
80 34
81 31
82 34
83 23
84 18
85 30
86 19
87 19
88 20
89 8
90 17
91 7
92 14
93 9
94 15
95 10
96 12
97 10
98 10
99 12
100 16
101 5
102 7
103 7
104 8
105 9
106 13
107 4
108 5
109 10
110 8
111+ 96
Download as CSV

Kai-Da Xu D-index placement in Electronics and Electrical Engineering in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 6,875 Electronics and Electrical Engineering scientists ranked by Research.com in 2026, grouped into 82 ranges running from 30 to 111+ D-Index.
  • Kai-Da Xu, a Electronics and Electrical Engineering scholar from University of Alcalá, records 38 D-Index - the 30th percentile of the discipline.
  • 30% of ranked Electronics and Electrical Engineering scientists score the same or lower than Kai-Da Xu, and about 70% score higher.
  • The median of the discipline falls in the 46 D-Index range, and Kai-Da Xu ranks below the median.
  • The most crowded range is 32 D-Index, holding 263 scientists (4% of the field).
  • 60% of the field sits in the lowest quarter of the value range (up to 50 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 111 D-Index or more, 96 scientists in all (1% of the field).

Overview

Kai-Da Xu is affiliated with the University of Alcalá in Spain and has contributed extensively to the field of engineering, with a particular focus on electrical and electronic engineering. They have produced over 500 publications, addressing various subfields such as aerospace engineering, biomedical engineering, electronic, optical and magnetic materials, and atomic and molecular physics and optics.

Their main research areas include microwave engineering and waveguides, advanced antenna and metasurface technologies, antenna design and analysis, photonic and optical devices, plasmonic and surface plasmon research, metamaterials and metasurfaces applications, and radio frequency integrated circuit design.

Kai-Da Xu has published papers in several notable venues. Frequent publication venues with multiple contributions include:

  • IEEE Transactions on Microwave Theory and Techniques
  • IEEE Antennas and Wireless Propagation Letters
  • IEEE Microwave and Wireless Technology Letters
  • IEEE Photonics Technology Letters
  • IEEE Transactions on Antennas and Propagation

Their recent prominent papers include:

  • Tunable multi-band terahertz absorber using a single-layer square graphene ring structure with T-shaped graphene strips, 2020, Optics Express
  • 60-GHz Compact Dual-Mode On-Chip Bandpass Filter Using GaAs Technology, 2021, IEEE Electron Device Letters
  • Millimeter-Wave On-Chip Bandpass Filter Based on Spoof Surface Plasmon Polaritons, 2020, IEEE Electron Device Letters
  • A high Q-factor dual-band terahertz metamaterial absorber and its sensing characteristics, 2023, Nanoscale
  • Millimeter-Wave E-Plane Waveguide Bandpass Filters Based on Spoof Surface Plasmon Polaritons, 2022, IEEE Transactions on Microwave Theory and Techniques

The scientist has frequently collaborated with a group of coauthors, including Jianxing Li, Qiang Chen, Ying-Jiang Guo, Jianlei Cui, and Sen Yan, with collaboration counts ranging from 15 to 36 joint publications.

Best Publications

  • Tunable multi-band terahertz absorber using a single-layer square graphene ring structure with T-shaped graphene strips.

    Kai Da Xu;Jianxing Li;Anxue Zhang;Qiang Chen

  • 60-GHz Compact Dual-Mode On-Chip Bandpass Filter Using GaAs Technology

    Kai-Da Xu;Ying-Jiang Guo;Yiqun Liu;Xianjin Deng

  • Microstrip Patch Antennas With Multiple Parasitic Patches and Shorting Vias for Bandwidth Enhancement

    Kai Da Xu;Han Xu;Yanhui Liu;Jianxing Li

  • Substrate Integrated Waveguide Cavity-Backed Slot Array Antenna Using High-Order Radiation Modes for Dual-Band Applications in $K$ -Band

    Wenxun Li;Kai Da Xu;Xiaohong Tang;Yang Yang

  • Tunable broadband terahertz absorber based on multilayer graphene-sandwiched plasmonic structure

    Yijun Cai;Kai-Da Xu

  • A high <i>Q</i>-factor dual-band terahertz metamaterial absorber and its sensing characteristics

    Unknown

  • Millimeter-Wave On-Chip Bandpass Filter Based on Spoof Surface Plasmon Polaritons

    Ying-Jiang Guo;Kai-Da Xu;Xianjin Deng;Xu Cheng

  • Anisotropic infrared plasmonic broadband absorber based on graphene-black phosphorus multilayers.

    Yijun Cai;Kai-Da Xu;Naixing Feng;Rongrong Guo

  • Novel Surface Plasmon Polariton Waveguides with Enhanced Field Confinement for Microwave-Frequency Ultra-Wideband Bandpass Filters

    Ying Jiang Guo;Kai Da Xu;Yanhui Liu;Xiaohong Tang

  • Pattern Synthesis of Unequally Spaced Linear Arrays Including Mutual Coupling Using Iterative FFT via Virtual Active Element Pattern Expansion

    Yanhui Liu;Xin Huang;Kai Da Xu;Zhengyong Song

  • High-Selectivity Wideband Bandpass Filter Using Simple Coupled Lines With Multiple Transmission Poles and Zeros

    Kai-Da Xu;Donghao Li;Yanhui Liu

  • Wideband Patch Antenna Using Multiple Parasitic Patches and Its Array Application With Mutual Coupling Reduction

    Kai Da Xu;Jianfeng Zhu;Shaowei Liao;Quan Xue

  • A Decoupling and Matching Network Design for Single- and Dual-Band Two-Element Antenna Arrays

    Kai-Da Xu;Hung Luyen;Nader Behdad

  • Design of a Stub-Loaded Ring-Resonator Slot for Antenna Applications

    Kai Da Xu;Yong Hong Zhang;Ronald J. Spiegel;Yong Fan

  • Switchable and tunable bifunctional THz metamaterial absorber

    Unknown

  • Two Memristor SPICE Models and Their Applications in Microwave Devices

    Kai Da Xu;Yong Hong Zhang;Lin Wang;Meng Qing Yuan

  • Broadband Filtering Power Dividers Using Simple Three-Line Coupled Structures

    Kai Da Xu;Yecheng Bai;Xue Ren;Quan Xue

  • Spoof plasmonic waveguide developed from coplanar stripline for strongly confined terahertz propagation and its application in microwave filters.

    Ying Jiang Guo;Kai Da Xu;Xiaohong Tang

  • Substrate Integrated Plasmonic Waveguide for Microwave Bandpass Filter Applications

    Longfang Ye;Yao Chen;Kai Da Xu;Weiwen Li

  • Spoof Surface Plasmon Polaritons Based on Balanced Coplanar Stripline Waveguides

    Kai-Da Xu;Fengyu Zhang;Yingjiang Guo;Longfang Ye

  • Bandpass Filter Using Three Pairs of Coupled Lines With Multiple Transmission Zeros

    Kai Da Xu;Fengyu Zhang;Yanhui Liu;Qing Huo Liu

Frequent Co-Authors

Qing Huo Liu
Qing Huo Liu Eastern Institute of Technology, Ningbo
William T. Joines
William T. Joines Duke University
Anxue Zhang
Anxue Zhang Xi'an Jiaotong University
Y. Jay Guo
Y. Jay Guo University of Technology Sydney
Kaijun Song
Kaijun Song University of Electronic Science and Technology of China
Shiwen Yang
Shiwen Yang University of Electronic Science and Technology of China
Quan Xue
Quan Xue South China University of Technology
Xi Zhu
Xi Zhu Chinese University of Hong Kong
Karu P. Esselle
Karu P. Esselle University of Technology Sydney
Nader Behdad
Nader Behdad University of Wisconsin–Madison

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