# dr.ing. I. E. Lager

*Associate Professor*

Terahertz Sensing (THZ), Department of Microelectronics

### Biography

Ioan E. Lager was born in Brasşov, Romania, on September 26, 1962. He received the M.Sc. degree in electrical engineering from the Transilvania University, Brasşov, Romania, in 1987, the Ph.D. degree in electrical engineering from the Delft University of Technology, Delft, the Netherlands, in 1996, and a second Ph.D. degree in electrical engineering from the Transilvania University in 1998.

He successively occupied research and academic positions with the Transilvania University and the Delft University of Technology, where he is currently Associate Professor. In 1997, he was Visiting Scientist with Schlumberger-Doll Research, Ridgefield, CT, USA. He has a special interest in bridging the gap between electromagnetic-field theory and the design, implementation, and physical measurements of wireless systems. His research interests cover computational electromagnetics and antenna engineering, with an emphasis on pulsed-field electromagnetic propagation and nonperiodic (interleaved) array antenna architectures.

Dr. Lager is active in several antenna engineering European networks, primarily in the “VISTA” COST Action.

### Publications

**Nonuniform Array Antenna Design Incorporating the Mutual Coupling Between Rectangular Aperture Antennas**

Z. Wang; I. Lager; M. Simeoni;

In*12th European Conference on Antennas and Propagation*,

London, United Kingdom, April 2018.**A Complete Tool for Analyzing Mutual Couplings in Nonuniform Arrays of Rectangular Aperture Radiators**

Z. Wang; M. Simeoni; I. E. Lager;*IEEE Antennas and Wireless Propagation Letters*,

Volume 16, pp. 3192-3195, November 2017. DOI: 10.1109/LAWP.2017.2768225

document**Finite temporal support pulses for EM excitation**

I. E. Lager; S. L. van Berkel;*IEEE Antennas and Wireless Propagation Letters*,

Volume 16, pp. 1659-1662, June 2017. DOI: 10.1109/LAWP.2017.2662205

document**Grating lobes prediction in 3D array antennas**

S. Bosma; W.P. Bruinsma; R.P. Hes; M.J. Bentum; I.E. Lager;

In*11th European Conference on Antennas and Propagation*,

Paris, France, March 2017.**Analysis of photoconductive antennas power radiation by Norton equivalent circuit**

A. Garufo; G. Carluccio; N. Llombart; A. Neto; I. E. Lager;

In*European Microwave Week 2017*,

Nüremberg, Germany, Oct. 8-13 2017.**Scan loss mitigation via subarrays. A full-scale concept demonstrator**

F. S. Akbar; L. P. Ligthart; G. Hendrantoro; I. E. Lager;

In*European Microwave Week 2017*,

Nüremberg, Germany, pp. 156-159, Oct. 2017.**A near-field setup with independent amplitude and phase control of the stimuli for phased antenna testing**

C. De Martino; M. Spirito; I. E. Lager; M. Simeoni;

In*12th European Conference on Antennas and Propagation*,

Paris, France, pp. 2862-2866, Mar. 19–24 2017.**Field quantities - a geometrical perspective**

I. E. Lager;

In*12th European Conference on Antennas and Propagation*,

Paris, France, pp. 3211-3215, Mar. 19–24 2017.**Time-domain EM numerical modelling: A pulse shape causality and temporal support analysis**

I. E. Lager; S. van Berkel; N. Llombart; A. Neto;

In*Proc. 10th European Conference on Antennas and Propagation*,

Davos, Switzerland, 10-15 April 2016. 10.1109/EuCAP.2016.7481733.

document**On the Design of A Dual Polarized Leaky Lens Antenna for Wideband Applications**

O. Yurduseven; N. Llombart; I.E. Lager; A. Neto;

In*European Microwave Week (EuMW 2016)*,

London, UK, October 2016.**On the adequacy of the far-field conditions for pulsed radiated EM fields**

I.E. Lager; A.B. Smolders;*IEEE Antennas and Wireless Propagation Letters*,

Volume 14, pp. 1561-1564, August 2015.

document**The time-domain optical theorem in antenna theory**

M. Stumpf; I.E. Lager;*IEEE Antennas and Wireless Propagation Letters*,

Volume 14, pp. 895-897, April 2015.

document**TD radiation properties of array antennas composed of pulsed electric-current excited elements**

I.E. Lager; A.T. de Hoop;*IEEE Antennas and Wireless Propagation Letters*,

Volume 14, pp. 715-718, March 2015.

document**Performance enhancement of 300 GHz on-chip double slot antenna by means of artificial dielectrics**

W. H. Syed; G. Fiorentino; D. Cavallo; P. M. Sarro; A. Neto; I. E. Lager;

In*45th European Microwave Conference*,

Paris, France, Sep. 6-11 2015.**Pulsed-field array performance: A TD analysis**

I.E. Lager;

In*45th European Microwave Conference (EuMC)*,

Paris, France, pp. 1475-1478, September 2015.**Beamforming in sparse, random, 3D array antennas with fluctuating element locations**

M.J. Bentum; I.E. Lager; S. Bosma; W.P. Bruinsma; R.P. Hes;

In*European conference on Antennas and Propagation (EuCAP)*,

Lisbon, Portugal, April 2015.**Signal integrity in pulse-train excited array antennas in time and space - A full TD analysis**

A.T de Hoop; I.E. Lager;

In*European conference on Antennas and Propagation (EuCAP)*,

Lisbon, Portugal, April 2015.**Pulsed EM field, close-range signal transfer in layered configurations A time-domain analysis**

I. E. Lager; V. Voogt; B. J. Kooij;*IEEE Transactions on Antennas and Propagation*,

Volume 62, Issue 5, pp. 2642-2651, May 2014.

document**Closed-form analytic expressions for the pulsed-source radiated electromagnetic field in a class of media with time-varying wave speed**

A. T. de Hoop; I. E. Lager;*Wave Motion*,

November 2013.

document**Equivalent Thvenin and Norton Kirchhoff circuits of a receiving antenna**

A.T. de Hoop; M. Stoopman; W. A. Serdijn; I. E. Lager;*IEEE Antennas and Wireless Propagation Letters*,

Volume 12, Issue 1, pp. 1627-1629, December 2013.

document**Causal Pulses With Rectangular Spectral Content: A Tool for TD Analysis of UWB Antenna Performance**

I. E. Lager; A. T. de Hoop;*IEEE Antennas and Wireless Propagation Letters*,

Volume 12, Issue 1, pp. 1488-1491, December 2013.

document**Wireless digital information transfer: modelling, prediction and assessment**

I. E. Lager; A. T. de Hoop; T. Kikkawa;

In*Pulsed Electromagnetic Fields Symposium*,

Delft, Netherlands, March~18-19 2013.**Non-uniform array antennas -- the time-domain perspective**

A. Shlivinski; I. E. Lager; E. Heyman;

In*7th European Conference on Antennas and Propagation*,

April 2013.**Leaky Lens Antennas and Kinetic Inductance Detectors - The Solution for THz Integration**

A. Neto; N. Llombart; I. E. Lager; J. J. A. Baselmans; A. Baryshev; S. Yates;

In*43th European Microwave Conference*,

October 2013.**Loop-to-loop pulsed electromagnetic field signal transfer in layered configurations -- application to inter-chip wireless communication**

V. Voogt; I. E. Lager; B. J. Kooij;

In*7th European Conference on Antennas and Propagation*,

April 2013.**Model pulses for performance prediction of digital microlectronic systems**

I. E. Lager; A. T. de Hoop; T. Kikkawa;*IEEE Transactions on Components, Packaging and Manufacturing Technology*,

Volume 2, Issue 11, pp. 1859-1870, November 2012.

document**Mutual coupling in non-uniform array antennas - An effective recipe**

I. E. Lager; M. Simeoni;

In*6th European Conference on Antennas and Propagation*,

March~26-30 2012.**Pulsed-field wireless interconnects in digital integrated circuits - A time-domain signal transfer and electromagnetic emission analysis**

I. E. Lager; A. T. de Hoop; T. Kikkawa;

In*6th European Conference on Antennas and Propagation*,

March~26-30 2012.**Radiation properties of non-uniform array antennas**

I. E. Lager; M. Simeoni;

In*42nd European Microwave Conference*,

October 2012.**Loop-to-loop pulsed electromagnetic field wireless signal transfer**

I. E. Lager; A. T. de Hoop;

In*6th European Conference on Antennas and Propagation*,

March~26-30 2012.**Pulsed-field EMI susceptibility analysis of microelectronic circuits - A full time-domain methodology**

A. T. de Hoop; H. Blok; I. E. Lager; M. Stumpf; G. A. E. Vandenbosch;

In*42nd European Microwave Conference*,

October 2012.**Pulsed electromagnetic field radiation from a wide slot antenna with a dielectric layer**

M. Stumpf; A. T. de Hoop; I. E. Lager;*IEEE Transactions on Antennas and Propagation*,

Volume 59, Issue 8, pp. 2789-2798, August 2011.

document**On the array performance of printed, ultra wide-band 'Eared' antennas**

F. M. Tanyer - Tigrek; I. E. Lager; L. P. Ligthart;*IEEE Antennas and Propagation Magazine*,

Volume 53, Issue 5, pp. 57-64, October 2011.

document**Time-domain receiving properties of a multimode cylindrical waveguide antenna**

I. E. Lager; A. T. de Hoop;

In*5th European Conference on Antennas and Propagation*,

April 2011.**Electromagnetic focusing in biological tissues**

W. M. Brink; I. E. Lager; B. J. Kooij;

In*5th European Conference on Antennas and Propagation*,

April 2011.**A super wideband antenna**

D. P. Tran; A. Szilagyi; I. E. Lager; P. Aubry; L. P. Ligthart; A. G. Yarovoy;

In*5th European Conference on Antennas and Propagation*,

April 2011.**Puzzling radiators - Functionality enhancement by means of shared aperture antennas**

I. E. Lager; M. Simeoni; C. I. Coman; C. Trampuz; L. P. Ligthart; P. van Genderen;

In*33rd ESA Antenna Workshop on Challenges for Space Antenna Systems*,

Noordwijk, The Netherlands, October 2011.**Pulsed fields EM interference analysis in digital signal wireless interconnects**

A. T. de Hoop; I. E. Lager;

In*41st European Microwave Conference*,

October 2011.**On the operating principles of UWB, CPW-fed printed antennas**

F. M. Tanyer - Tigrek; A. Hizal; I. E. Lager; and L. P. Ligthart;*IEEE Antennas and Propagation Magazine*,

Volume 52, Issue 3, pp. 46-50, June 2010.

document**A CPW-fed printed loop antenna for ultra wideband applications, and its linear array performance**

F. M. Tanyer - Tigrek; I. E. Lager; L. P. Ligthart;*IEEE Antennas and Propagation Magazine*,

Volume 52, Issue 4, pp. 31-40, August 2010.

document**Pulsed electromagnetic field radiation from a narrow slot antenna with a dielectric layer**

M. Stumpf; A. T. de Hoop; I. E. Lager;*Radio Science*,

Volume 45, October 2010.

document**Multicriteria optimization of antennas in time-domain**

J. Láčk; I. E. Lager; Z. Raida;*Radio-engineering*,

Volume 19, Issue 1, pp. 105-110, April 2010.

document**Experimental validation of a linear array consisting of CPW fed, UWB, printed, loop antennas**

F. M. Tanyer - Tigrek; I. E. Lager; L. P. Ligthart;*IEEE Transactions on Antennas and Propagation*,

Volume 58, Issue 4, pp. 1411-1414, April 2010.

document**Experimental validation of the UWB 'Eared' antenna for impulse radio applications**

F. M. Tanyer-Tigrek; I. E. Lager; L. P. Ligthart;

In*4th European Conference on Antennas and Propagation*,

April 2010.**Sunflower sparse array for space applications: from design to manufacturing**

M. C. Vigano; G. Caille; C. Mangenot; I. E. Lager; G. Toso;

In*4th European Conference on Antennas and Propagation*,

April 2010.**Application of the shared aperture antenna concept to radar front-ends: advantages and limitations**

I. E. Lager; C. Trampuz; M. Simeoni; C. I. Coman; L. P. Ligthart;

In*4th European Conference on Antennas and Propagation*,

April 2010.**Sparse antenna array for earth-coverage satellite applications**

M.C. Vigano; G. Toso; P. Angeletti; I. E. Lager; A. G. Yarovoy; D. Caratelli;

In*4th European Conference on Antennas and Propagation*,

April 2010.**Sparse planar array synthesis technique for satellite applications**

M. C. Vigano; G. Caille; G. Toso; C. Mangenot; I. E. Lager;

In*IEEE Antennas and Propagation Symposium*,

July 2010.**Interleaved array antennas design - (Almost) deterministic strategies**

M. Simeoni; I. E. Lager; C. I. Coman; C. Trampuz;

In*Progress in Electromagnetic Research Symposium (PIERS 2010)*,

July 2010.

document**The relativity of bandwidth - the pursuit of truly ultra wideband radiators for communication applications**

I. E. Lager; L. P. Ligthart; D. P. Tran; F. M. Tanyer-Tigrek; M. Simeoni; P. van Genderen; A. Szilagyi; C. I. Coman;

In*8th International Conference on Communications*,

June 2010.**Experimental characterization of channel crosstalk in interleaved array antennas for FMCW radar**

C. Trampuz; I. E. Lager; M. Simeoni; L. P. Ligthart;

In*7th European Radar Conference*,

September 2010.**Inter-chip and intra-chip pulsed signal transfer between transmitting and receiving loops in wireless interconnect configurations**

I. E. Lager; A. T. de Hoop;

In*40th European Microwave Conference*,

September 2010.**Non-dispersive, UWB leaky lens antenna for millimeter and submillimeter wave frequencies**

A. Neto; I. E. Lager;

In*20th International Conference on Applied Electromagnetics and Communications*,

Dubrovnik, Croatia, September 2010.

document**Closed-form time-domain expressions for the 2D pulsed EM field radiated by an array of slot antennas of finite width**

M. Stumpf; A. T. de Hoop; I. E. Lager;

In*20th URSI International Symposium on Electromagnetic Theory*,

Berlin, Germany, pp. 703-706, August 2010.

document**Interleaved array antennas for FMCW radar applications**

I. E. Lager; C. Trampuz; M. Simeoni; L.P. Ligthart;*IEEE Transactions on Antennas and Propagation*,

Volume 57, Issue 8, pp. 2486-2490, August 2009.

document**Implementation of polarization agility in planar phased-array antennas by means of interleaved sub-arrays**

M. Simeoni; I. E. Lager; C. I. Coman; A.G. Roederer;*Radio Science*,

Volume 44, Issue 5, October 2009.

document**CPW-fed, quasi-magnetic, printed antenna for ultra wide-band applications**

F. M. Tanyer-Tigrek; D. P. Tran; I. E. Lager; L.P. Ligthart;*IEEE Antennas and Propagation Magazine*,

Volume 51, Issue 2, pp. 61-70, April 2009.

document**Sunflower array antenna with adjustable density taper**

M. C. Vigano; G. Toso; G. Caille; C. Mangenot; I. E. Lager;*International Journal of Antennas and Propagation*,

January 2009.

document**The pulsed-field multiport antenna system reciprocity relation and its applications - A time-domain approach**

A. T. de Hoop; I. E. Lager; V. Tomassetti;*IEEE Transactions on Antennas and Propagation*,

Volume 57, Issue 3, pp. 594-605, March 2009.

document**A novel unidirectional radiator with superb UWB characteristics for X-band phased array applications**

D. P. Tran; F. M. Tanyer - Tigrek; I. E. Lager; L. P. Ligthart;

In*3rd European Conference on Antennas and Propagation*,

March~23-27 2009.**Design of an AMC plane for a unidirectional, low profile Tulip antenna**

F. M. Tanyer - Tigrek; R. M. Mateos; C. Craeye; I. E. Lager;

In*3rd European Conference on Antennas and Propagation*,

March~23-27 2009.**Channel crosstalk analysis in interleaved array antennas for FMCW radar**

C. Trampuz; I. E. Lager; M. Simeoni; L. P. Ligthart;

In*39th European Microwave Conference*,

September 2009.**Low sidelobe interleaved transmit-receive antennas for FMCW radar applications**

C. Trampuz; M. Simeoni; I. E. Lager; L. P. Ligthart;

In*IEEE Antennas and Propagation Symposium*,

June 2009.**Spatial density tapered sunflower antenna array**

M. C. Vigano; G. Toso; G. Caille; C. Mangenot; I. E. Lager;

In*3rd European Conference on Antennas and Propagation*,

March~23-27 2009.**Wideband tulip loop antenna**

F. M. Tanyer-Tigrek; D. P. Tran; I. E. Lager; L. P. Ligthart;

In*3rd European Conference on Antennas and Propagation*,

March~23-27 2009.**Efficient and accurate investigation of linear arrays consisting of UWB radiators**

F. M. Tanyer-Tigrek; I. E. Lager; L. P. Ligthart;

In*39th European Microwave Conference*,

September 2009.**Radiation properties of array antennas deployed on hexagonal lattices**

M. C. Vigano; M. Simeoni; I. E. Lager;

In*30th ESA Antenna Workshop on Antennas for Earth Observation, Science, Telecommunication and Navigation Space Missions*,

Noordwijk, The Netherlands, pp. 118-121, May 2008.**Over 150% bandwidth, quasi-magnetic, printed antenna**

F. M. Tanyer - Tigrek; D. P. Tran; I. E. Lager; and L. P. Ligthart;

In*IEEE Antennas and Propagation Society International Symposium*,

July 2008.**Open-ended triangular waveguide antenna**

M. Simeoni; M. C. Vigano; I. E. Lager;

In*IEEE Antennas and Propagation Society International Symposium*,

July 2008.**Projection based methodology for designing non-periodic, planar arrays**

M.C. Vigano; I. E. Lager; G. Toso; C. Mangenot; G. Caille;

In*38th European Microwave Conference*,

October 2008.**A novel uni-directional, off-axis CPW-Fed, matched by unbalanced fork-stub, UWB ring slot antenna printed on single layer PCB with back plane**

D. P. Tran; F. M. Tanyer - Tigrek; I. E. Lager; L. P. Ligthart;

In*IEEE Antennas and Propagation Symposium*,

July 2008.**Complementarity based design of antenna systems for FMCW radar**

C. Trampuz; M. Simeoni; I. E. Lager; L .P. Ligthart;

In*5th European Radar Conference*,

October 2008.**Measurement of electrically large array antennas in small anechoic chambers**

M. Simeoni; I. E. Lager; C. I. Coman;*IEEE Antennas and Propagation Magazine*,

Volume 49, Issue 2, pp. 100-106, April 2007.

document**The design of shared aperture antennas consisting of differently sized elements**

C. I. Coman; I. E. Lager; L.P. Ligthart;*IEEE Transactions on Antennas and Propagation*,

Volume 54, Issue 2, pp. 376-383, February 2006.

document**Patch end-launchers - A family of compact colinear coaxial-to-rectangular waveguide transitions**

M. Simeoni; C. I. Coman; I. E. Lager;*IEEE Transactions on Microwave Theory and Techniques*,

Volume 54, Issue 4, pp. 1503-1511, April 2006.

document**WGEMLab - A simulation platform for the analysis of rectangular waveguide aperture radiation**

I. E. Lager; C. I. Coman; A.T. de Hoop;*IEEE Transactions on Magnetics*,

Volume 39, Issue 3, pp. 1697-1700, May 2003.

document**Application of the domain-integrated field relations method to the solution of large scale static and stationary magnetic field problems**

I. E. Lager; G. Mur;*IEEE Transactions on Magnetics*,

Volume 38, Issue 2, pp. 465-468, March 2003.

document**Finite formulation and domainintegrated field relations in electromagnetics - A synthesis**

I. E. Lager; E. Tonti; A. T. de Hoop; G. Mur; M. Marrone;*IEEE Transactions on Magnetics*,

Volume 39, Issue 3, pp. 1199-1202, May 2003.

document**On the causes of spurious solutions in electromagnetics**

G. Mur; I. E. Lager;*Electromagnetics*,

Volume 22, Issue 4, pp. 357-367, May 2002.

document**The space-time integrated model of electromagnetic field computation**

A. T. de Hoop; I. E. Lager; P. Jorna;*Electromagnetics*,

Volume 22, Issue 5, pp. 371-379, May 2002.

document**Domain-integrated field equations approach to static magnetic field computation - Application to some two-dimensional configurations**

A. T. de Hoop; I. E. Lager;*IEEE Transactions on Magnetics*,

Volume 36, Issue 4, pp. 654-658, July 2000.

document**A finite-element method for modeling of electromagnetic fields using generalized cartesian elements**

G. Mur; I. E. Lager;*IEEE Transactions on Magnetics*,

Volume 35, Issue 3, pp. 1376-1379, May 1999.

document**A note on the uniqueness of a class of non-linear electrostatic field problems**

A. T. de Hoop; I. E. Lager;*IEE Proceedings Science, Measurement and Technology*,

Volume 146, Issue 4, pp. 175-181, July 1999.

document**Static magnetic field computation - An approach based on the domain-integrated field equations**

A. T. de Hoop; I. E. Lager;*IEEE Transactions on Magnetics*,

Volume 34, Issue 5, pp. 3355-3358, September 1998.

document**Least-squares minimising finite-element formulation for static and stationary electric and magnetic fields**

I. E. Lager; G. Mur;*IEEE Transactions on Magnetics*,

Volume 34, Issue 5, pp. 2419-2424, September 1998.

document**Generalized Cartesian finite elements**

I. E. Lager; G. Mur;*IEEE Transactions on Magnetics*,

Volume 34, Issue 4, pp. 2220-2227, July 1998.

document**Finite element method for stationary and static electromagnetic fields**

I. E. Lager; G. Mur;*Journal of Applied Physics*,

Volume 81, Issue 8, pp. 4079-4081, April 1997.**The finite element modeling of static and stationary electric and magnetic fields**

I. E. Lager; G. Mur;*IEEE Transactions on Magnetics*,

Volume 32, Issue 3, pp. 631-634, July 1996.

document**Compatibility relations for time-domain and static electromagnetic field problems**

I. E. Lager; G. Mur;*Applied Computational Electromagnetics Society Journal*,

Volume 9, Issue 2, pp. 25-29, July 1991.

## BibTeX support

Last updated: 25 Mar 2019

### Ioan Lager

- +31 15 27 85591
- i.e.lager@tudelft.nl
- Room: LB 01.410
- List of publications