101 citations · 341 across the 15 of their papers we have counts for
15 papers
Reliable Linearized Phase Retrieval for Near-Field Antenna Measurements with Truncated Measurement Surfaces
Alexander Paulus, Josef Knapp, Jonas Kornprobst +1
Most methods tackling the phase retrieval problem of magnitude-only antenna measurements suffer from unrealistic sampling requirements, from unfeasible computational complexities,…
Multi-Frequency Phase Retrieval for Antenna Measurements
Josef Knapp, Alexander Paulus, Jonas Kornprobst +2
Phase retrieval problems in antenna measurements arise when a reference phase cannot be provided to all measurement locations. Phase retrieval algorithms require sufficiently many…
Compact Uniform Circular Quarter-Wavelength Monopole Antenna Arrays with Wideband Decoupling and Matching Networks
Jonas Kornprobst, Thomas J. Mittermaier, Raimund A. M. Mauermayer +7
Two novel decoupling and matching networks (DMNs) in microstrip technology for three-element uniform circular arrays (UCAs) are investigated and compared to a more conventional DMN…
A Millimeter-Wave Self-Mixing Array with Large Gain and Wide Angular Receiving Range
Jonas Kornprobst, Thomas J. Mittermaier, Thomas F. Eibert
The concept of self-mixing antenna arrays is presented and analyzed with respect to its beneficial behavior of large gain over a wide angular range. The large gain is attained by a…
A mm-Wave Patch Antenna with Broad Bandwidth and a Wide Angular Range
Jonas Kornprobst, Kun Wang, Gerhard Hamberger +1
A novel mm-wave microstrip-fed patch antenna with broad bandwidth and wide angular coverage suitable for integration in planar arrays is designed, analyzed and verified by measurem…
Linear Phase Retrieval for Near-Field Measurements with Locally Known Phase Relations
Alexander Paulus, Jonas Kornprobst, Josef Knapp +1
A linear and thus convex phase retrieval algorithm for the application in phaseless near-field far-field transformations is presented. The formulation exploits locally known phase…
A Combined Source Integral Equation with Weak Form Combined Source Condition
Jonas Kornprobst, Thomas F. Eibert
A combined source integral equation (CSIE) is constructed on the basis of the electric field integral equation (EFIE) to solve electromagnetic radiation and scattering problems con…
A Weak-Form Combined Source Integral Equation with Explicit Inversion of the Combined-Source Condition
Jonas Kornprobst, Thomas F. Eibert
The combined source integral equation (CSIE) for the electric field on the surface of a perfect electrically conducting scatterer can be discretized very accurately with lowest-ord…
An Accurate Low-Order Discretization Scheme for the Identity Operator in the Magnetic Field and Combined Field Integral Equations
Jonas Kornprobst, Thomas F. Eibert
A new low-order discretization scheme for the identity operator in the magnetic field integral equation (MFIE) is discussed. Its concept is derived from the weak-form representatio…
Improved Discretization of the Full First-Order Magnetic Field Integral Equation
Jonas Kornprobst, Alexander Paulus, Thomas F. Eibert
The inaccuracy of the classical magnetic field integral equation (MFIE) is a long-studied problem. We investigate one of the potential approaches to solve the accuracy problem: hig…
Accuracy and Conditioning of Surface-Source Based Near-Field to Far-Field Transformations
Jonas Kornprobst, Josef Knapp, Raimund A. M. Mauermayer +3
The conditioning and accuracy of various inverse surface-source formulations are investigated. First, the normal systems of equations are discussed. Second, different implementatio…
Phase Retrieval for Partially Coherent Observations
Jonas Kornprobst, Alexander Paulus, Josef Knapp +1
Phase retrieval is in general a non-convex and non-linear task and the corresponding algorithms struggle with the issue of local minima. We consider the case where the measurement…
On a Refinement-Free Calderón Multiplicative Preconditioner for the Electric Field Integral Equation
Simon B. Adrian, Francesco P. Andriulli, Thomas F. Eibert
We present a Calderón preconditioner for the electric field integral equation (EFIE), which does not require a barycentric refinement of the mesh and which yields a Hermitian, posi…
On the Hierarchical Preconditioning of the PMCHWT Integral Equation on Simply and Multiply Connected Geometries
J. E. Ortiz Guzman, S. B. Adrian, R. Mitharwal +4
We present a hierarchical basis preconditioning strategy for the Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT) integral equation considering both simply and multiply connected ge…
On the Hierarchical Preconditioning of the Combined Field Integral Equation
Simon B. Adrian, Francesco P. Andriulli, Thomas F. Eibert
This paper analyzes how hierarchical bases preconditioners constructed for the Electric Field Integral Equation (EFIE) can be effectively applied to the Combined Field Integral Equ…