Marianna Ivashina

A Wide-Scanning Array Antenna of Connected Vertical Bowtie Elements Structurally Integrated Within an Aircraft Fuselage

A Wideband mm-Wave Watt-Level Spatial Power-Combined Power Amplifier With 26% PAE in SiGe BiCMOS Technology

Characterization and Calibration of the Hybrid OTA Chamber Using a Field Scanner

2022

The Apertif science verification campaign: Characteristics of polarised radio sources

Dual-frequency single-pulse study of PSR B0950+08

A mm-Wave Phased-Array Fed Torus Reflector Antenna with ±30° Scan Range for Massive-MIMO Base-Station Applications

2022

Seeing the forest and the trees: A radio investigation of the ULIRG Mrk 273

2022

Wideband Open-Ended Ridge Gap Waveguide Antenna Elements for 1-D and 2-D Wide-Angle Scanning Phased Arrays at 100 GHz

The Hybrid Chamber for OTA measurements: Plane Wave Spectrum Quality Vs. Dynamic Range Trade-off

Apercal - The Apertif calibration pipeline

2022

Characterising the Apertif primary beam response

2022

First release of Apertif imaging survey data

2022

A System-Performance-Based Comparison of Sparse Regular and Irregular Antenna Arrays for Millimeter-Wave Multi-User MIMO Base Stations

2022

Apertif: Phased array feeds for the Westerbork Synthesis Radio Telescope: System overview and performance characteristics

2022

Mutual Coupling Analysis of Open-Ended Ridge and Ridge Gap Waveguide Radiating Elements in an Infinite Array Environment

2022

Millimeter-Wave Quasi-Optical Feeds for Linear Array Antennas in Gap Waveguide Technology

Using a Conical Horn as Compact Antenna Test Range Feed in Millimetre Bands

Hybrid OTA Chamber for Multi-Directional Testing of Wireless Devices: Plane Wave Spectrum Generator Design and Experimental Demonstration

Sparse Array Synthesis Including Mutual Coupling for MU-MIMO Average Capacity Maximization

mmWave Metal Bowtie Slot Array Element Integrating Power Amplifier MMIC via On-Chip Probe to Enhance Efficiency and Bandwidth

Antenna Technologies for Beyond-5G Wireless Communication: Challenges and Opportunities

Apertif view of the OH megamaser IRAS 10597+5926: OH 18 cm satellite lines in wide-area H i surveys

Chromatic periodic activity down to 120 megahertz in a fast radio burst

Multipath Rician Channel Simulation in the Test Zone of a Hybrid OTA Chamber

Considerations of SiP based Antenna in Package/Module (AiP/AiM) Design at Sub-Terahertz Frequencies for Potential B5G/6G Applications

3D Printed Periodic Structures for RF Packaging of Integrated Array Module at sub-6GHz Band

A Design Concept of Power Efficient, High Gain Antenna System for mm-Waves Base Stations

2021

W-band Waveguide Antenna Elements for Wideband and Wide-Scan Array Antenna Applications For Beyond 5G

A 55-105 GHz PIN Diode SPDT Switch

2021

Quasi-Optical Beamforming Network for Millimeter-Wave Electronically Scanned Array Antennas with 1-Bit Phase Resolution

2021

Co-Design and Validation Approach for Beam-Steerable Phased Arrays of Active Antenna Elements with Integrated Power Amplifiers

Quiet Zone Quality of a Plane Wave Generator inside an Over-Moded Waveguide Chamber Emulating a Variable Angle of Incidence

A New Hybrid Chamber for Generating a Spectrum of Oblique Incident Plane Waves at the DUT

Millimeter Wave Antennas Using Gap Waveguides with Beam Steerability at Fixed Frequencies for Beyond 5G Mobile Communications

A search for radio emission from double-neutron star merger GW190425 using Apertif

2021

Integrated W-band Photoconductive Switches in SIW Technology

2021

Methods for Attenuating and Terminating Waves in Ridge Gap Waveguide at W_Band Carbon-Loaded Foam Carbonyl Iron Paint and Nickel Plating

2021

Low-loss K-band Photoconductive Switches in SIW Technology

2021

Numerical analysis of Huygens-like on-chip antennas for mm-wave applications

2021

A Wide Scanning Array of Connected Bowtie Antennas Suitable for Integration in Composite Sandwich Structures With Monte-Carlo Tolerance Analysis

Design of Circularly Polarized End-fire Antenna on Gap Waveguide for Automotive Radar Application

Power Efficiency and Linearity of Highly Integrated Transmitting Array Antennas

2021

Sparse Automotive MIMO Radar for Super-Resolution Single Snapshot DOA Estimation With Mutual Coupling

2021

Factory Radio Design of a 5G Network in Offline Mode

2021

Enhancing mmWave On-Chip-Antennas Using In-Package Electromagnetic Bandgap Structures

A Cavity-Backed Patch Antenna with Distributed Multi-Port Feeding, Enabling Efficient Integration with Doherty Power Amplifier and Band-Pass Filter

2021

Feasibility Study of a Wide Coverage Dual-Polarized Phased Array Antenna at 10 GHz

Emulating Rician distributed channels in a hybrid chamber for OTA measurements

2020

High power mm-wave spatial power combiner employing on-chip isolation resistors

2020

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

A Dual-Fed PIFA Antenna Element With Nonsymmetric Impedance Matrix for High-Efficiency Doherty Transmitters: Integrated Design and OTA-Characterization

Antenna Systems for 5G mm-Wave Radio Access

Design and Simulation of a 28 GHz Plane Wave Generator for NR Measurements

2020

Edge Truncation Effects in a Wide-Scan Phased Array of Connected Bowtie Antenna Elements

2020

Array Configuration Effect on the Spatial Correlation of MU-MIMO Channels in NLoS Environments

2020

A Wideband and Low-Loss Spatial Power Combining Module for mm-Wave High-Power Amplifiers

Antenna Mutual Coupling Effects in Highly Integrated Transmitter Arrays

Sparse Array Topologies for 5G mmWave Base-Stations: A System-Level Study

2020

Repeating fast radio bursts with WSRT/Apertif

2020

Reconfigurable Transmitarray with Near Field Coupling to Gap Waveguide Array Antenna for Efficient 2D Beam Steering

IC Design Aspects for 5G mm-Wave Systems

2020

Integration of Airborne Early Warning Radar Platforms on Aircraft

2020

Multi-Panel Sparse Base Station Design with Physical Antenna Effects in Massive MU-MIMO

2019

A Directly Matched PA-Integrated K-band Antenna for Efficient mm-Wave High-Power Generation

Characterization and Performance of an Ultra-Wideband Wide-Coverage Multimode MIMO Antenna

High-Efficiency and Wideband Aperiodic Array of Uniformly Excited Slotted Waveguide Antennas Designed Through Compressive Sensing

2019

Deep Integration Antenna Array: Design Philosophy and Principles

2019

A Wide Coverage S-Band Array with Dual Polarized Connected Bowtie Antenna Elements

Ultra-High-Performance C-and L-Band Radiometer System for Future Spaceborne Ocean Missions

2019

Towards a Generic Model for MU-MIMO Analysis Including Mutual Coupling and Multipath Effects

Indoor Received Power Prediction Based on Physical Optics (PO): Simulations and Experimental Validation in Industrial Environment

2019

N-way spatial power combining in SIW for high power generation MMICs-scalability bounds

2019

Joint Design and Co-integration of Antenna-IC Systems

A 1-D Steerable Beam Slotted Waveguide Antenna Employing Non-Conventional Aperiodic Array Architecture for mm-wave Line-Of-Sight MIMO

Aperiodic Switched Array for Line-of-Sight MIMO Backhauling

2018

Wideband mm-Wave Transition Between a Coupled Microstrip Line Array and SIW for High-Power Generation MMICs

Feed array breadboard for future passive microwave radiometer antennas

Innovative Multi-Feed-Per-Beam Reflector Antenna for Space-Borne Conical-Scan Radiometers

Capacity Gains of (3 × 3)×(3 × 3) MIMO Fixed Links with Planar Aperiodic Sparse Arrays in Pure-LOS Channels

2018

Efficient Millimeter-Wave High Power Generation with Spatial Power-Combined Feeding Element

Effects of diffraction and feed pattern variation in shaped offset gregorian reflectors

Phased Arrays for Radio Astronomy, Remote Sensing, and Satellite Communications

2018

A Ka-Band Active Integrated Antenna for 5G Applications: Initial Design Flow

Multibeam Focal Plane Arrays with Digital Beamforming for High Precision Space-Borne Ocean Remote Sensing

2018

Per-Antenna Power Distribution of a Zero-Forcing Beamformed ULA in pure LOS MU-MIMO

Ultra-high performance C L-band radiometer system for future spaceborne ocean missions

Network model of a 5G MIMO base station antenna in a downlink multi-user scenario

2017

MIMO Channel Capacity Gains in mm-Wave LOS Systems with Irregular Sparse Array Antennas

2017

Multi-Beam Focal Plane Arrays with Digital Beamforming for High Precision Space-Borne Remote Sensing

Effects of Regular and Aperiodic Array Layout in Multi-User MIMO Applications

2017

Prediction of Far-Field Pattern Characteristics of Phased Array Fed Reflector Antennas by Modeling Only a Small Part of the Array - Case Study of Spaceborne Radiometer Antennas

Point-to-Point 3 x 3 MIMO Performance Gains with Aperiodic Sparse Arrays in Pure LOS Channels

2017

Wide-Band Spatially Distributed TE10 Substrate Integrated Waveguide Transition for High-Power Generation at mm-Wave Frequencies

Low frequency diffraction effects when shaping the offset gregorian reflector system of the SKA

Toward Wide-Band Low-Loss Gap-Waveguide-Integrated Grid Amplifiers

Aperiodic Isophoric Slotted Waveguide Antenna for Point-to-Point Communications at Ka-band

2017

Focal Plane Array Breadboard For Advanced Multiple Beam Radiometer Antennas

2016

Synthesis of circular isophoric sparse arrays by using compressive-sensing

2016

Synthesis of Maximally Sparse Arrays Using Compressive Sensing and Full-Wave Analysis for Global Earth Coverage Applications

2016

Application of the Compressive-Sensing Approach to the Design of Sparse Arrays for SATCOM Applications

2016

Digital-beamforming array antenna technologies for future ocean-observing satellite missions

Modal-Based Design of a Wideband Quadruple-Ridged Flared Horn Antenna

Synergy in design of phased array antennas for modern radio astronomy and wireless communication systems

2016

W-band spatial power combiner and splitter in gap waveguide technology

Capabilities and fundamental limitations of multi-mode antennas in an array environment

2016

Domain-Decomposition Approach to Krylov Subspace Iteration

2016

Spatial Power Combining and Splitting in Gap Waveguide Technology

High-Sensitivity Phased Array Receivers for Radio Astronomy

2016

In memory of Professor Per-Simon Kildal

2016

Reconfigurable aperiodic array synthesis by Compressive Sensing

2015

Irregular Quad-Mode Antenna Array: Field-of-View Comparison with the Swedish LOFAR Station

2015

Quad-Mode Antenna for Wide-Scan Sparse Arrays

2015

Design of a Push-Broom Multi-Beam Radiometer for Future Ocean Observations

2015

An Optimal Beamforming Algorithm for Phased-Array Antennas Used in Multi-Beam Spaceborne Radiometers

On Antenna-Architectures for Sensitive Radiometry to Support Oceanography

2015

Multi-Element Aperiodic Array Synthesis by Compressive Sensing

2015

Efficient correction for both direction-dependent and baseline-dependent effects in interferometric imaging: An A-stacking framework

2015

Efficient Wideband Gain Modeling for Interferometric Imaging Arrays in Radio Astronomy

2015

Diffraction and Pattern Perturbation Effects in Offset Gregorian Reflector Antennas with Wideband Feeds

Dense focal plane array and multiple beam concepts make future high-quality radiometer missions possible

Conical Quad-Mode Antenna With Integrated Tapered Slot Antennas For Wide-Field Polarimetry

2015

Equivalent Circuit of a Quadraxial Feed for Ultra-Wide Bandwidth Quadruple-Ridged Flared Horn Antennas

2015

Fast Prediction of Aperture Efficiency and Sidelobe Levels in Shaped Reflector Systems through Model Based Output Space Mapping

2015

A Compact Dual-Polarized 4-Port Eleven Feed with High Sensitivity for Reflectors over 0.35-1.05 GHz

2015

Design of Maximally Sparse Antenna Arrays in the Presence of Mutual Coupling

2014

Mixed-Mode Sensitivity Analysis of a Combined Differential and Common Mode Active Receiving Antenna Providing Near-Hemispherical Field-of-View Coverage

2014

Onsala Space Observatory – IVS Technology Development Center Activities during 2013

Modal considerations for synthesizing the tapering profile of a quadruple-ridged flared horn antenna

Mixed Common and Differential Mode Analysis of Active Receiving Antennas

A Quad-Mode Antenna for Accurate Polarimetric Measurements Over an Ultra-Wide Field-of-View

2014

Optimization of the 0.35-1.05 GHz Quad-Ridged Flared Horn and Eleven feeds for the Square Kilometer Array baseline design

Future spaceborne ocean missions using high sensitivity multiple-beam radiometers

System noise performance of ultra-wideband feeds for future radio telescopes: Conical-Sinuous Antenna and Eleven Antenna

2014

Design of Wideband Quadruple-Ridged Flared Horn Feeds for Future Radio Telescopes

Beamforming strategies for active multi-mode antennas: Maximum gain, Signal-to-Noise ratio, and polarization discrimination

Toward a practical demonstration of physics-based beam calibration models - CBFPs and the LOFAR-LBA antenna array radio telescope

2014

Radiation Pattern Modeling with Characteristic Basis Function Patterns

2014

Characteristic Basis Function Analysis of Large Aperture-Fed Antenna Arrays

2014

Dense focal plane arrays for pushbroom satellite radiometers

2014

Aperiodic Array Antennas for Future Satellite Systems

2014

Novel multi-beam radiometers for accurate ocean surveillance

2014

A Quadraxial Feed for Ultra-Wide Bandwidth Quadruple-Ridged Flared Horn Antennas

2014

Fast and Accurate Analysis of Reflector Antennas with Phased Array Feeds Including Multiple Reflections between Feed and Reflector

Design of an active dual-mode antenna with near hemispherical Field of View coverage

2013

Onsala Space Observatory – IVS Technology Development Center

2013

An overview of Beam Modeling Techniques for Future Radio Telescopes

2013

Accurate Beam Prediction Through Characteristic Basis Function Patterns for the MeerKAT/SKA Radio Telescope Antenna

Application of the characteristic basis function pattern method to reflector surface inaccuracies and sidelobe modeling

2013

A Plane Wave Approximation in the Computation of Multiscattering Effects in Reflector Systems

2013

Improving the Calibration Efficiency of an Array Fed Reflector Antenna through Con-strained Beamforming

2013

A Simple Method for Optimal Antenna Array Thinning Using a Broadside MaxGain Beamformer

2012

Polarimetry With Phased Array Antennas: Theoretical Framework and Definitions

2012

Wide bandwidth integrated 1-4 GHz feed development for VLBI and SKA

2012

Characteristic basis function patterns – a novel expansion method for the fast and accurate prediction of antenna array beams

2012

Towards the understanding of the interaction effects between reflector antennas and phased array feeds

2012

Performance evaluation of far-field patterns for radio astronomy applications through the Jacobi-Bessel series

2012

Efficient Prediction of Array Element Patterns Using Physics-Based Expansions and a Single Far-Field Measurement

2012

Noise-based antenna terms for active receiving arrays

2012

Analysis of the strut and feed blockage effects in radio telescopes with compact UWB feeds

2012

Polarimetry With Phased Array Antennas: Sensitivity and Polarimetric Performance Using Unpolarized Sources for Calibration

2012

Development of a detailed system model of the Eleven feed receiver using the CAESAR software

2012

Towards a uniform evaluation of the science quality of SKA technology options: Polarimetrie aspects

Experimental Results for the Sensitivity of a Low Noise Aperture Array Tile for the SKA

2011

Performance of polarimetric beamformers for phased array radio telescopes

2011

New BOR1 and decoupling efficiencies for characterizing ultra-wideband reflectors and feeds for future radio telescopes

An axi-symmetric segmented composite SKA dish design: Performance and production analysis

2011

Guest Editorial for the Special Issue on Antennas for Next Generation Radio Telescopes

2011

An Optimal Beamforming Strategy for Wide-Field Surveys With Phased-Array-Fed Reflector Antennas

Beamforming, calibration, and figures of merit for polarimetric phased array antennas

Element gain drifts as an imaging dynamic range limitation in PAF-based interferometers

2011

Analysis of large microstrip-fed tapered slot antenna arrays by combining electrodynamic and quasi-static field models

Temporal beam pattern stability of a radio astronomy phased array feed

Reducing the complexity of the beam calibration models of phased-array radio telescopes

Performance assessment of bi-scalar beamformers in practical phased array feed systems

THACO: a Test Facility for Characterizing the Noise Performance of Active Antenna Arrays

Performance of multi-beam reflectors fed by phased array feeds with impedance-matching layers

Extending the capabilities of the GRASP and CAESAR software to analyze and optimize active beamforming array feeds for reflector systems

Characterization of active beamforming phased-array feeds for the next generation radio telescopes: Numerical modeling and experimental verification

Design of a low-loss low-noise tapered slot phased array feed for reflector antennas

2010

Reply to Comments on ‘Decoupling efficiency of a wideband Vivaldi focal plane array feeding a reflector antenna’

2010

Unified Definitions of Efficiencies and System Noise Temperature for Receiving Antenna Arrays