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Research Output 1991 2020

2020
12 Downloads (Pure)

5G RAN architecture based on analog radio-over-fiber fronthaul over UDWDM-PON and phased array fed reflector antennas

Konstantinou, D., Bressner, T. A. H., Rommel, S., Johannsen, U., Johansson, M. N., Ivashina, M. V., Smolders, A. B. & Tafur Monroy, I., 1 Jan 2020, In : Optics Communications. 454, 10 p., 124464.

Research output: Contribution to journalArticleAcademicpeer-review

Open Access
reflector antennas
Radio-over-fiber
Antenna reflectors
Dense wavelength division multiplexing
Antenna phased arrays

Uncertainty in reverberation-chamber antenna-efficiency measurements in the presence of a phantom

Bronckers, L. A. S., Remley, K. A., Jamroz, B., Roc'h, A. & Smolders, A. B. B., Jan 2020, In : IEEE Transactions on Antennas and Propagation.

Research output: Contribution to journalArticleAcademicpeer-review

Reverberation
Antennas
Uncertainty
Communication
2019

30-GHz co-designed low-noise amplifier and antenna-on-chip for wireless applications

Chen, Z., Liu, Q., Smolders, B., Baltus, P. & Gao, H., Aug 2019, 2019 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT). Piscataway: Institute of Electrical and Electronics Engineers, 3 p. 8929159

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Low noise amplifiers
Antennas
BiCMOS technology
Monopole antennas
Radiation

5G millimeter-wave beam adaptation for indoor moving users

Schulpen, R., Smolders, A. B. & Johannsen, U., Oct 2019, 2019 49th European Microwave Conference, EuMC 2019. Piscataway: Institute of Electrical and Electronics Engineers, p. 424-427 4 p. 8910760

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Millimeter waves
millimeter waves
Glass
optimization
glass

A hybrid integration strategy for compact, broadband and highly efficient millimeter-wave on-chip antennas

Van den Brande, Q., Lemey, S., Poelman, S., Caytan, O., Bogaert, L., Reniers, A., Smolders, B., Kuyken, B., Ginste Vande, D. & Rogier, H., 1 Nov 2019, In : IEEE Antennas and Wireless Propagation Letters. 18, 11, p. 2424-2428 5 p., 8769935.

Research output: Contribution to journalArticleAcademicpeer-review

Millimeter waves
Antennas
Substrate integrated waveguides
Silicon
Antenna feeders
1 Citation (Scopus)
3 Downloads (Pure)

An E-band silicon-IC-to-waveguide contactless transition incorporating a low-loss spatial power combiner

Kaul, P., Aljarosha, A., Smolders, A. B., Baltus, P. G. M., Matters - Kammerer, M. & Maaskant, R., 16 Jan 2019, 2018 IEEE Asia-Pacific Microwave Conference, APMC. Piscataway: Institute of Electrical and Electronics Engineers, p. 1528-1530 3 p. 8617206

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Waveguides
Electromagnetic coupling
Silicon
Insertion losses
Frequency bands
16 Downloads (Pure)

A new design method for frequency-reconfigurable antennas using multiple tuning components

Bronckers, S., Roc'h, A. & Smolders, B., Dec 2019, In : IEEE Transactions on Antennas and Propagation. 67, 12, p. 7285-7295 11 p., 8777318.

Research output: Contribution to journalArticleAcademicpeer-review

Open Access
File
Tuning
Antennas
Barium strontium titanate
Radiation
Mobile phones
1 Citation (Scopus)
3 Downloads (Pure)

Antenna-on-Chip radiation pattern characterization: analysis of different approaches

Liu, Q., Johannsen, U., van Beurden, M. C. & Smolders, A. B. B., 1 Mar 2019, 13th European Conference on Antennas and Propagation, EuCAP 2019. Piscataway: Institute of Electrical and Electronics Engineers, 5 p. 8739306

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Directional patterns (antenna)
antennas
chips
Antennas
probes
91 Downloads (Pure)

ARoF-Fed antenna architectures for 5G networks

Johannsen, U., Rommel, S., Al-Rawi, A., Konstantinou, D., Bressner, T., Tafur Monroy, I. & Smolders, B., 22 Apr 2019, 2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings. Optical Society of America (OSA), 3 p. 8696727

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Antenna feeders
Antennas
Communication
Costs
2 Downloads (Pure)

Assessment of a contactless characterization method for integrated antennas

van den Biggelaar, A. J. T., Daverveld, D., Reniers, A. C. F., Johannsen, U. & Smolders, A. B. B., Oct 2019, 49th European Microwave Conference (EuMC 2019). Piscataway: Institute of Electrical and Electronics Engineers, p. 381-384 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Antennas
3 Downloads (Pure)

Assessment on the frequency dependent performance of active phased arrays for 5G

van den Biggelaar, A. J., Johannsen, U., Geurts, M. & Smolders, A. B., 1 Mar 2019, 13th European Conference on Antennas and Propagation, EuCAP 2019. Piscataway: Institute of Electrical and Electronics Engineers, 4 p. 8739544

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Antenna phased arrays
phased arrays
Frequency bands
Calibration
antennas
16 Downloads (Pure)

Benchmarking a high-end smartphone’s antenna efficiencies

Bronckers, S., Roc'h, A. & Smolders, B., 1 Aug 2019, In : IEEE Access. 7, p. 105680-105686 7 p., 8784153.

Research output: Contribution to journalArticleAcademicpeer-review

Open Access
File
Smartphones
Benchmarking
Antennas
Radiation
Reverberation
2 Citations (Scopus)
523 Downloads (Pure)
Open Access
File
antenna gain
Focal plane arrays
beamforming
focal plane devices
Beamforming
6 Downloads (Pure)

Design of a mm-wave MIMO radar demonstrator with an array of FMCW radar chips with on-chip antennas

Syeda, R. Z., Adela, B. B., van Beurden, M. C., van Zeijl, P. T. M. & Smolders, A. B., Oct 2019, EuRAD 2019 - 2019 16th European Radar Conference. Piscataway: Institute of Electrical and Electronics Engineers, p. 33-36 4 p. 8904571

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

MIMO radar
MIMO (control systems)
radar
Transmitters
Radar
1 Citation (Scopus)
42 Downloads (Pure)

Extended range ultra-wideband millimeter-wave channel sounder with over-the-air calibration

Schulpen, R., Konstantinou, D., Rommel, S., Johannsen, U., Tafur Monroy, I. & Smolders, B., Mar 2019, 13th European Conference on Antennas and Propagation (EuCAP 2019). Piscataway: Institute of Electrical and Electronics Engineers, 5 p. 8739567

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Millimeter waves
Ultra-wideband (UWB)
Acoustic waves
Calibration
Air
1 Downloads (Pure)

Gain-maximization of FPA-fed reflectors by means of linear regression

Narayanan, S., Al-Rawi, A., Dubok, A., de Hon, B. P. & Smolders, A. B. B., Jul 2019, 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings. Piscataway: Institute of Electrical and Electronics Engineers, p. 469-470 2 p. 8889292

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Focal plane arrays
focal plane devices
Linear regression
reflectors
regression analysis

Guest editorial antenna-in-package, antenna-on-chip, antenna-IC interface: joint design and cointegration

Hong, W., Maaskant, R., Liu, D., Wang, H., Shamim, A., Smolders, B., Manteuffel, D. & Zhang, Y., Nov 2019, In : IEEE Antennas and Wireless Propagation Letters. 18, 11, p. 2345-2350 6 p., 8891841.

Research output: Contribution to journalEditorialAcademicpeer-review

Open Access
50 Downloads (Pure)

MIMO performance evaluation of isotropic, directional and highly-directional antenna systems for mm-wave communications

Bressner, T., Farsaei, A., Fozooni, M., Johannsen, U., Johansson, M. & Smolders, B., Mar 2019, 13th European conference on antennas and propagation (EuCAP 2019 ). Piscataway: Institute of Electrical and Electronics Engineers, 5 p. 8739373

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
directional antennas
MIMO (control systems)
communication
Antennas
evaluation

Modeling of a direct transition from IC-package to waveguide

Geluk, S. J., de Hon, B. P. & Smolders, A. B., 10 Jan 2019, 2018 IEEE International Symposium on Antennas and Propagation USNC/URSI National Radio Science Meeting. Piscataway: Institute of Electrical and Electronics Engineers, p. 2369-2370 2 p. 8608660

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Waveguides
waveguides
method of moments
Method of moments
excitation
21 Downloads (Pure)
Open Access
File
Microwave circuits
Antennas
Textbooks
Microwaves
Passive networks
Packaging
Antennas
Antenna radiation
Metals
Antenna grounds
9 Downloads (Pure)

On free-space antenna reflection phase measurements in a reverberation chamber

Bronckers, L. A., Roc'h, A. & Smolders, A. B., 4 Jan 2019, 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. Piscataway: Institute of Electrical and Electronics Engineers, p. 7-8 2 p. 8602581

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
reverberation chambers
Phase measurement
Reverberation
antennas
Antennas

On the phase-error tolerance of virtual antenna arrays in MIMO radars

Syeda, R. Z., van Beurden, M. C. & Smolders, A. B., Jul 2019, 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings. Piscataway: Institute of Electrical and Electronics Engineers, p. 1573-1574 2 p. 8888580

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

MIMO (control systems)
phase error
antenna arrays
Antenna arrays
MIMO systems
1 Downloads (Pure)

Point-to-point dielectric-horn integrated resonator antenna with reduced side-lobe level

Baldazzi, E., Al-Rawi, A., Smolders, A. B., Cicchetti, R. & Caratelli, D., Jul 2019, 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings. Piscataway: Institute of Electrical and Electronics Engineers, p. 69-70 2 p. 8888919

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Antenna lobes
Dielectric resonators
wireless communication
Directional patterns (antenna)
lobes
31 Downloads (Pure)

Reflector synthesis for wide-scanning focal plane arrays

Dubok, A., Al-Rawi, A., Gerini, G. & Smolders, A. B., 1 Apr 2019, In : IEEE Transactions on Antennas and Propagation. 67, 4, p. 2305-2319 15 p., 8621011.

Research output: Contribution to journalArticleAcademicpeer-review

Open Access
File
Focal plane arrays
Scanning
Geometrical optics
Beamforming
Time delay
11 Downloads (Pure)

Reverberation chamber enhanced backscattering: high-frequency effects

Bronckers, S., Roc'h, A. & Smolders, B., 17 Oct 2019, EMC Europe 2019 - 2019 International Symposium on Electromagnetic Compatibility. Piscataway: Institute of Electrical and Electronics Engineers, 6 p. 8871728

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Reverberation
Backscattering
Antennas
Horn antennas
1 Downloads (Pure)

Scan properties of slot-fed dielectric resonator antenna arrays for 5G wireless communications

Al-Rawi, A., Smolders, A. B. & Caratelli, D., Jul 2019, 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings. Piscataway: Institute of Electrical and Electronics Engineers, p. 615-616 2 p. 8888535

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Dielectric resonators
antenna arrays
Antenna feeders
wireless communication
Antenna arrays
2 Downloads (Pure)

Statistical analysis applied to simulating and measuring circularly-polarized millimeter wave antennas

Reniers, A., Liu, Q., Rousstia, M., Herben, M., Visser, H. & Smolders, A. B., 1 Feb 2019, In : IEEE Antennas and Propagation Magazine. 61, 1, p. 98-138 14 p., 8631087.

Research output: Contribution to journalArticleAcademicpeer-review

Millimeter waves
statistical analysis
millimeter waves
Statistical methods
antennas
15 Downloads (Pure)

The effect of peripheral equipment loading on reverberation-chamber metrics

Hubrechsen, A., Bronckers, S., Remley, K. A., Jones, R., Horansky, R., Reniers, A., Roc'h, A. & Smolders, B., Sep 2019, 2019 International Symposium on Electromagnetic Compatibility - EMC Europe. Piscataway: Institute of Electrical and Electronics Engineers, p. 7-12 6 p. 8871515

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Reverberation
Antennas
Insulation
Copper
Bandwidth

Towards a generic model for MU-MIMO analysis including mutual coupling and multipath effects

Amani, N., Wymeersch, H., Johannsen, U., Smolders, A. B., Ivashina, M. V. & Maaskant, R., 1 Mar 2019, 13th European Conference on Antennas and Propagation, EuCAP 2019. Piscataway: Institute of Electrical and Electronics Engineers, 4 p. 8739369

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

MIMO (control systems)
antennas
Antennas
visual perception
linear arrays
2018
1 Citation (Scopus)

Analysis of surface waves modes in planar connected arrays for radio astronomy

Baelemans, R., Sutinjo, A., Smolders, B., Davidson, D., Johannsen, U. & Wayth, R., 1 Nov 2018, Proceedings of the 2018 20th International Conference on Electromagnetics in Advanced Applications, ICEAA 2018. Piscataway: Institute of Electrical and Electronics Engineers, p. 446-449 4 p. 8520459

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Radio astronomy
radio astronomy
Surface waves
surface waves
derivation
1 Downloads (Pure)

Angular stable artificial magnetic conductor for oblique incident TM plane waves

van den Biggelaar, A. J., Johannsen, U. & Smolders, A. B., 2018, 14th Loughborough Antennas and Propagation Conference (LAPC 2018). 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Polarization

Antenna-on-chip integration in mainstream silicon semiconductor technologies

Johannsen, U. & Smolders, A. B., 1 Jan 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018). Piscataway: Institute of Electrical and Electronics Engineers, 5 p. 8568617

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Semiconductor materials
Antennas
Silicon
Smartphones
Millimeter waves
1 Citation (Scopus)

Assessment of the dielectric losses of artificial magnetic conductors for antenna-on-chip applications

van den Biggelaar, A. J., Johannsen, U. & Smolders, A. B., 22 Nov 2018, 2018 48th European Microwave Conference (EuMC) . PIscataway: Institute of Electrical and Electronics Engineers, p. 272-275

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

dielectric loss
antennas
conductors
chips
lossy media
143 Downloads (Pure)

Assessment on the bandwidth of artificial magnetic conductors for antenna-on-chip applications

van den Biggelaar, A. J., Johannsen, U. & Smolders, A. B., 10 Dec 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018). Institution of Engineering and Technology (IET), 5 p. 8568350

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Antennas
Bandwidth
Silicon
Substrates
Metals
2 Citations (Scopus)
10 Downloads (Pure)

Chasing the wave in a reverberation chamber

Bronckers, L. A., Roc'h, A. & Smolders, A. B., 5 Oct 2018, EMC Europe 2018 - 2018 International Symposium on Electromagnetic Compatibility. Institute of Electrical and Electronics Engineers, p. 708-712 5 p. 8485050

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
reverberation chambers
Reverberation
Antennas
antennas
profiles

Compact Antenna Array for limited field of view applications

Maximidis, R., Caratelli, D., Toso, G. & Smolders, A. B., 2018, Proceedings of 39th ESA Antenna Workshop.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Beam forming networks
Antenna feeders
Antenna arrays
Antennas
1 Downloads (Pure)

Co-simulation results of a 60 GHz CMOS LNA integrated and packaged in gap-waveguide technology

Aljarosha, A., Wang, B., Gao, H., Smolders, B., Matters-Kammerer, M. K. & Maaskant, R., Apr 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018). Institution of Engineering and Technology (IET), 4 p. 8671670

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Low noise amplifiers
Waveguides
Noise figure
Polychlorinated biphenyls
Wire
3 Downloads (Pure)

Damper-to-damper path loss characterization for intra-vehicular wireless sensor networks

Costa, C. A. M., Gao, H., Le Polain, T., van Dommele, R., Smolders, B., Dheans, M. & Baltus, P., 5 Jan 2018, 2017 European Radar Conference (EURAD) : "A Prime Year for a Prime Event", EuMW 2017 - Conference Proceedings; 14th European Microwave Conference, EURAD 2017. Piscataway: Institute of Electrical and Electronics Engineers, p. 493-496 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

dampers
Wireless sensor networks
Railroad cars
wireless communication
roads
8 Downloads (Pure)

Design of a phased-array antenna for 5G base station applications in the 3.4-3.8 GHz band

Schulpen, R., Johannsen, U., Pires, S. C. & Smolders, A. B., 9 Apr 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018). Institution of Engineering and Technology (IET), 5 p. 8568780

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Antenna phased arrays
Base stations
Antennas
Fires
Electronic equipment
1 Downloads (Pure)

Guidelines for millimeter-wave antenna measurements

Reniers, A. C. F. & Smolders, A. B., 9 Nov 2018, 2018 IEEE Conference on Antenna Measurements and Applications, CAMA 2018. Piscataway: Institute of Electrical and Electronics Engineers, p. 1-4 8530518

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Millimeter waves
millimeter waves
antennas
Antennas
Directional patterns (antenna)
1 Downloads (Pure)

High-gain reflector feed for multibeam coverage

Maximidis, R. T., Caratelli, D., Toso, G. & Smolders, A. B., 10 Dec 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018) . Piscataway: Institute of Electrical and Electronics Engineers, 3 p. 8568290

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Antenna feeders
Multibeam antennas
Directional patterns (antenna)
Electric power distribution
Topology
4 Citations (Scopus)
3 Downloads (Pure)

High-isolation array antenna integration for single-chip millimeter-wave FMCW radar

Adela, B. B., van Beurden, M. C., van Zeijl, P. T. & Smolders, A. B., 1 Oct 2018, In : IEEE Transactions on Antennas and Propagation. 66, 10, p. 5214-5223

Research output: Contribution to journalArticleAcademicpeer-review

Antenna arrays
Millimeter waves
Radar
Energy gap
Diffraction
2 Citations (Scopus)
72 Downloads (Pure)

Improved probing reliability in antenna-on-chip measurements

Liu, Q., Reniers, A., Johannsen, U., van Beurden, M. C. & Smolders, A. B., 15 Aug 2018, In : IEEE Antennas and Wireless Propagation Letters. 17, 9, p. 1745-1749 5 p.

Research output: Contribution to journalArticleAcademicpeer-review

Open Access
File
Antennas
Landing
Calibration
1 Citation (Scopus)
58 Downloads (Pure)
Open Access
File
Random errors
Directional patterns (antenna)
Antenna arrays
Statistical Models
1 Citation (Scopus)

Influence of on-wafer probes in mm-wave antenna measurements

Liu, Q., Reniers, A. C. F., Johannsen, U., van Beurden, M. C. & Smolders, A. B., 15 Apr 2018, 12th European Conference on Antennas and Propagation, EuCAP 2018. Institution of Engineering and Technology (IET), 5 p. 8568052

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Antennas
Calibration
Coaxial cables
Monopole antennas
Coplanar waveguides
2 Downloads (Pure)

Linear LINC transmitters using dual-polarized power-combining antennas

Tresnawan, D., Smulders, P. F. M., van Ark, B. & Smolders, A. B., 10 Dec 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018). Institution of Engineering and Technology (IET), 4 p. 8568842

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Transmitters
Antennas
Level measurement
Quadrature amplitude modulation
Antenna feeders
1 Citation (Scopus)
150 Downloads (Pure)

On the use of focal-plane arrays in mm-wave 5G base stations

Elsakka, A., Bressner, T. A. H., van den Biggelaar, A. J., Al-Rawi, A., Johannsen, U., Ivashina, M. V. & Smolders, A. B., 10 Dec 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018) . Institution of Engineering and Technology (IET), 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Focal plane arrays
Base stations
Antennas
Antenna reflectors
Beamforming
1 Citation (Scopus)

Optical beamformer for K-band smart antenna systems

Trinidad, A. M., Tessema, N., Cao, Z., van Zantvoort, J. H. C., Dubok, A., Al-Rawi, A. N. H., Tangdiongga, E., Smolders, A. B. & Koonen, A. M. J., 13 Jun 2018, 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings. Piscataway : Institute of Electrical and Electronics Engineers, 3 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Smart antennas
extremely high frequencies
antennas
Antenna phased arrays
beamforming
13 Downloads (Pure)

Planar sensors for dielectric and magnetic materials measurement: A quantitative sensitivity comparison

Bronckers, L. A., van Rossum, M. J. R. A. & Smolders, A. B., 10 Dec 2018, 12th European Conference on Antennas and Propagation (EuCAP 2018). Institution of Engineering and Technology (IET), 4 p. 8568328

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Magnetic variables measurement
Sensors
Conformal mapping
Geometry
Coplanar waveguides