Per-Simon Kildal
Showing 667 publications
Design of a double layer cavity backed slot array antenna in gap waveguide technology
Design of 8 × 8 Slot Array Antenna based on Inverted Microstrip Gap Waveguide
Useful Physical Images and Algorithms for Vector Dyadic Green's Functions [Wireless Corner]
E-band 3-D metal printed wideband planar horn array antenna
Gap adapters for screw redundant high frequency measurements
A multi-layer gap waveguide array antenna suitable for manufactured by die-sink EDM
Micromachined Linear Slot Array Antenna for 100 GHz with 10 dB Gain Using GAP Waveguide Technology
Mm-Wave contactless connection for MMIC integration in gap waveguides
Different gap waveguide slot array configurations for mmwave fixed beam antenna application
A self-grounded dual-polarized wideband bowtie with improved MIMO performance in Random-LOS
Measured LTE Throughput for SISO, SIMO and MIMO in Polarization-Random-LOS
Degrees of freedom of the field and maximum directivity
Design of Sector Antenna with Wideband 2D Hat-fed Reflector for Wireless Communications
Antenna Measurements in Reverberation Chamber Using USRP
Design of integrated diplexer-power divider
Optimizing the numerical port for inverted microstrip gap waveguide in full-wave simulators
Corporate distribution networks for slot array antenna based on groove gap waveguide technology
Simple Formula for Aperture Efficiency Reduction Due to Grating Lobes in Planar Phased Arrays
Characterizing Polarization-MIMO Antennas in Random-LOS Propagation Channels
Planar Eleven Antenna as a Wideband MIMO Micro-base Station Antenna
W-band spatial power combiner and splitter in gap waveguide technology
Simulations of a planar array arrangement for automotive Random-LOS OTA testing
Devising a Horizontal Chamber Array for Automotive OTA Tests in Random Line-Of-Sight
Investigation of Polarization Deficiencies in SIMO Systems in Random-LOS Propagation Channels
Polymer Gap Adapter for Contactless, Robust, and Fast Measurements at 220-325 GHz
AMC pin waveguide flange for screw redundant millimeter and submillimeter measurements
Design of transition from WR-15 to inverted microstrip gap waveguide
A V-Band Inverted Microstrip Gap Waveguide End-Coupled Bandpass Filter
Simple Boundary Condition for Canonical EBG Surface: PMC-Backed Uniaxial Medium
Designing a dual-polarized octave bandwidth bowtie antenna for a linear array
A high gain ridge gap waveguide fed slot antenna array for 60 GHz applications
Low-profile planar eleven antenna over a magnetic plane
Array-fed cylindrical reflector antenna for automotive OTA tests in Random Line-Of-Sight
Spatial Power Combining and Splitting in Gap Waveguide Technology
Half-height Pins – a New Pin Form in Gap Waveguide for Easy Manufacturing
Modern Antenna Technologies Stimulated by the Arecibo Radio Telescope Upgrade Project 1984-1997
Design of a Cavity-backed Slot Array Unit Cell on Inverted Microstrip Gap Waveguide
A groove gap Waveguide Iris Filter for V-band Application
An Air-filled Cavity-backed 2×2 Slot Sub-array Fed by Inverted Microstrip Gap Waveguide
Design of a transition from WR-15 to microstrip packaged by gap waveguide technology
Study of Grating Efficiency of Planar Arrays
Measuring user-induced-randomness to evaluate smart phone performance in real envi-ronments
V-Band Groove Gap Waveguide Diplexer
Investigation of mode stirring with plate on platform in a reverberation chamber
MIMO OTA Testing of a Communication System Using SDRs in a Reverberation Chamber
Optimizing Small Wideband Antenna Performance for Both RIMP and Random-LOS
On S-Parameter based Complex Correlation of Multi- Port Antenna
Methods and apparatuses for testing wireless communications to vehicles
MICROMACHINED GAP WAVEGUIDE DEVICES FOR ABOVE 100 GHZ
Design of 60GHz Planar Array Antennas Using PCB-based Microstrip-Ridge Gap Waveguide and SIW
Direct-Coupled Cavity Filter in Ridge Gap Waveguide
Revisiting the Complex Correlation in a MIMO System
Microstrip-Ridge Gap Waveguide – Study of Losses, Bends and Transition to WR-15
Investigation of Transitions for Use in Inverted Microstrip Gap Waveguide Antenna Arrays
OTA characterization of μBTS antenna in RIMP and random-LOS
60GHz Slot-Array Antenna Design Based on Gap Waveguide Cavity and Gap Waveguide Feed
Planar Dual-Mode Horn Array with Corporate-Feed Network in Inverted Microstrip Gap Waveguide
Fundamental Limitations on Small Multi-Beam Antennas for MIMO Systems
Arrangements and Applications of Self-grounded Antennas
MIMO Characterization on System Level of 5G Micro Base Stations Subject to Ran-domness in LOS
Wideband Compact 4-Port Dual Polarized Self-Grounded Bowtie Antenna
OTA Characterization of mu BTS Antenna in RIMP and Random-LOS
Estimating TIS of 4G LTE devices from OTA throughput measurements in reverberation chamber
Methods and apparatuses for testing wireless communications to vehicles
Verifying detection probabilities for MIMO system in reverberation chamber
Overview of state-of-the-art OTA measurements of wireless devices in reverberation chamber
Micromachined gap waveguide devices for above 100 GHz
Prospective new PMC based gap waveguide shielding for microwave modules
Micromachined Groove Gap Waveguides for 100 GHz applications
Linear slot array design in ridge gap waveguide technology
Ka-Band Gap Waveguide Coupled-Resonator Filter for Radio Link Diplexer Application
Near-field characteristics of amended DB boundary conditions
Investigation of the Distribution of the Random LOS Component in a Reverberation Chamber
Micromachined gap waveguides for 100 GHz applications
Evaluation of cross-coupling inside gap-waveguides
Parabolic cylindrical reflector antenna at 60 GHz with line feed in gap waveguide technology
New Approach to OTA Testing: RIMP and pure-LOS as Extreme Environments & a Hypothesis
Definition of Antenna Diversity Gain in User-Distributed 3D-Random Line-Of-Sight
Overview of developments of the eleven Feeds
Design of a Dual-Mode Horn Element for Microstrip Gap Waveguide Fed Array
Evaluation of losses of the ridge gap waveguide at 100 GHz
Wideband Receivers for VLBI2010 Applications
EuCAP 2013 in Gothenburg, Sweden: "An Impressive Success"
Study of Q-Factors of Ridge and Groove Gap Waveguide Resonators
Characterization of Implemented Algorithm for MIMO Spatial Multiplexing in Reverberation Chamber
Ku band linear slot-array in ridge gapwaveguide technology
Resemblance Between Gap Waveguides and Hollow Waveguides
Design of a four-element horn antenna array fed by inverted microstrip gap waveguide
LTE MIMO multiplexing performance measured in reverberation chamber and accurate simple theory
Design of Compact Dual-Polarized 1.2–10 GHz Eleven Feed for Decade Bandwidth Radio Telescopes
Comparison of parallel-plate Green’s function acceleration techniques
Investigation of a Microstrip-to-Ridge Gap Waveguide transition by electromagnetic coupling
Slot antenna in ridge gap waveguide technology
Contactless non-leaking waveguide flange realized by bed of nails for millimeter wave applications
Ka-band gap waveguide coupled-resonator filter for radio link diplexers
OTA Testing in Multipath of Antennas and Wireless Devices With MIMO and OFDM
Design of a coplanar waveguide-to-ridge gap waveguide transition via capacitive coupling
Design and System Integration of 2-14 GHz Eleven Feed for VLBI2010
Diversity Gains in Random Line-Of-Sight and Rich Isotropic Multipath Environment
Evaluation of multi element antennas in reverberation chamber
Metamatrial based packaging method for improved isolation of circuit elements in microwave modules
New Microstrip Gap Waveguide on Mushroom-Type EBG for Packaging of Microwave Components
Fabrication method for high-frequency components
Micromachined Ridge Gap Waveguide and Resonator for Millimeter-Wave Applications
Bed of Springs for Packaging of Microstrip Circuits in the Microwave Frequency Range
Gap waveguide components for millimeter-wave systems. Couplers, filters, antennas, MMIC packaging
Analysis of the strut and feed blockage effects in radio telescopes with compact UWB feeds
Evaluation of losses in microstrip gap waveguide for slot antennas applications
Micromachined Ridge Gap Waveguide and Resonator for 220-325 GHz
Development of the cryogenic 2-14 GHz eleven feed system for VLBI2010
Modeling system throughput of single and multi-port wireless LTE devices
Improved Microstrip Filters Using PMC Packaging by Lid of Nails
A study of uncertainty models in a reverberation chamber at NIST
Verification of K-factor Based Formula for Measurement Uncertainty in Reverberation Chamber
Review of recent developments of the eleven feed for future decade bandwidth radio telescopes
Wearable textile antennas’ efficiency characterization using a reverberation chamber
The PMC-Amended DB Boundary - A Canonical EBG Surface
New low loss inverted microstrip line using gap waveguide technology for slot antenna applications
Micromachined ridge gap waveguide for sub millimeter and millimeter wave applications
IMPROVED BROADBAND MULTIDIPOLE ANTENNA WITH FREQUENCY-INDEPENDENT RADIATION CHARACTERISTICS
Cryogenic 2-13 GHz Eleven feed for reflector antennas in future wideband radio telescopes
Design of Band-Pass Filter Using Gap Waveguide Technology
Waveguides and transmission lines in gaps between parallel conducting surfaces
Comparisons of different methods to determine correlation applied to multi-port UWB eleven antenna
Design of Micromachined Ridge Gap Waveguides for Millimeter-Wave Applications
Modelling EBG surfaces using amended DB boundary conditions
Measurements of RFID Tag Sensitivity in Reverberation Chamber
Improving microstrip filters with gap waveguide packaging
State-of-the-art measurements of LTE terminal antenna performance using reverberation chamber
Developing hard waveguides based on gap waveguide concept
Estimation of average Rician K-factor and average mode bandwidth in loaded reverberation chamber
Spatial correlations of incremental sources in isotropic environment such as reverberation chamber
About Random LOS in Rician Fading Channels for MIMO OTA Tests
Estimation of Average Rician K-factor in Reverberation Chamber
Determination of maximum doppler shift in reverberation chamber using level crossing rate
Multipath emulator for Simulation of wireless terminals' performance
Design of microwave circuits in ridge gap waveguide technology
Validation of ridge gap waveguide performance using in-house TRL calibration kit
Compact formulas for diversity gain of two-port antennas
EBG-based gap waveguide for applications up to THz
Electromagnetic scattering from circular cylinders with PEC/PMC boundaries
Development of a compact Eleven feed cryostat for the Patriot 12m antenna
Design of cryogenic 2-14 GHz Eleven feed for reflector antennas for future radio telescopes
On diversity performance of two-element coupling element based antenna structure for mobile terminal
Power divider in ridge gap waveguide technology
Compact Formulas for Diversity Gain of Two-Port Antennas
Packaging of microstrip circuits using gap waveguide approach
Comparison of two decade bandwidth feeds for reflector antennas: Eleven antenna and quadridge horn
The ridge gap waveguide as a wideband rectangular hard waveguide
Comparison of RMS delay spread and decay time measured in reverberation chamber
Concept of gap waveguide and measured results for first demonstrator
Losses in ridge gap waveguide compared with rectangular waveguide and microstrip lines
Quasi-TEM H-plane horns with wideband open hard side-walls
About measurements in reverberation chamber and isotropic reference environment
A low noise integrated 0.3-16 GHz differential amplifier for balanced ultra wideband antennas
Q-factor comparisons between new gap waveguide technology and standard rectangular waveguide
A new type of the quasi-TEM eigenmodes in a rectangular waveguide with one corrugated hard wall
Cryogenic 2-14GHz low noise receiver for radio astronomy using Eleven feed
Comparison of diversity gains of wideband antennas measured in anechoic and reverberation chambers
Cryogenic integration of 2-14 GHz Eleven Feed in wideband receiver for VLBI 2010
Approximated closed form characteristic impedance for the bed of nails-based gap waveguide
On-going work with the cryogenic Eleven antenna at the MIT Haystack Observatory
System noise calculations over the decade bandwidth of the Eleven feed
Efficient spectral domain Green's function analysis of novel metamaterial bandgap guiding structures
Packaging of active and passive microwave circuits using lid or bed of curved posts
Design and realization of a linearly polarized Eleven feed for 1-10 GHz
Local metamaterial-based waveguides in gaps between parallel metal plates
Experimental Demonstration of Local Quasi-TEM Gap Modes in Single-Hard-Wall Waveguides
Local wave Green's functions of parallel plate metamaterial-based gap waveguides with one hard wall
Numerical study of position stirring and frequency stirring in loaded reverberation chamber
Parallel plate cavity mode suppression in microstrip circuit packages using a lid of nails
Design of Transition from Coaxial Line to Ridge Gap Waveguide
Developing a cooled 2-14 GHz Eleven feed for SKA and VLBI 2010
Study of the characteristic impedance of a ridge gap waveguide
Electrical Design of a Cooled 2-14 GHz Eleven Feed for SKA and VLBI 2010
Characterization of Feeds for Radio Telescopes
Searching for analytic modal solutions for the gap waveguide
Dispersion characteristics of a metamaterial-based parallel plate ridge waveguides
X- Ka dual band prime focus feed for satellite earth terminals
Development of a coolable 2-14 GHz Eleven feed for future radio telescopes for SKA and VLBI 2010
Three Metamaterial-based Gap Waveguides between Parallel Metal Plates for mm/submm Waves
Determination of Measurement Uncertainty of Different Reverberation Chambers
Decoupling efficiency of a wideband Vivaldi focal plane array feeding a reflector antenna
Alternative ridge gap waveguide design using a mushroom-type EBG surface
Blockage reduction in thick cylinders by shaping hard cross sections
Design, Manufacture and Test of Eleven Feed for 1-13 GHz
Comparison of blockage widths of ideally hard cylinders of different cross-sectional shapes
Optimization of 200-800 MHz Eleven Feed for Use in Reflector Antennas of GMRT
Modal solutions in dual-depth longitudinally corrugated hard waveguide
Blockage reduction of rhombic cylinders using meta-surfaces
Parametric Characterization of Parabolic Reflector Antennas Fed by Focal Plane Arrays
Progress report on developing Eleven feed for VLBI2010 and SKA frequency bands
Cloaking Since 1988 Using the Original Invisibility Concept Based on Hard Surfaces
On unifying efficiency concepts of phase arrays, focal plane arrays and MIMO arrays
Degradation of MIMO-capacity due to correlation and efficiency of practical antennas
Three Fast Ways of Measuring Receiver Sensitivity in a Reverberation Chamber
Characterization of multi-port Eleven antenna for use in MIMO system
Report on Developing Decade Bandwidth Eleven Feeds for Radio Telescopes such as SKA and VLBI 2010
Comparison of bandgaps of mushroom-type EBG surface and corrugated and strip-type soft surfaces
Fundamental directivity and efficiency limitations of small antennas with one or more ports
RF Invisibility Using Metamaterials: Harry Potter's Cloak or the Emperor's New Clothes?"
Bandgaps and cloaks with soft and hard surfaces
The Eleven antenna feed for monopulse tracking and combining L-, C-, X- and Ku- satellite bands
Measurement of embedded element efficiencies of wideband dense arrays in reverberation chamber
Diversity characterization of optimized two-antenna systems for UMTS handsets
Measurements of total radiated power of UMTS phones in reverberation chamber
Validity of Approximate Boundary Conditions in Analysis of Strip-Loaded Planar and Curved Surfaces
The European School of Antennas: Results and Perspectives
Optimization of 200-800 MHz Eleven feed for use in reflector antennas of GMRT
Bandgaps and cloaks with soft and hard surfaces
Comparison of different loading configurations and numerical models of reverberation chambers
20 Years with Bandgaps and Invisibility Cloaking Using Soft and Hard Surfaces
Numerical study of different loading configurations and stirring methods of reverberation chambers
Tripling Bandwidth of Hat Feed by genetic Algorithm Optimization
Curved frequency selective surface analysis based on the G1DMULT algorithm
Optimization of antenna diversity gain by combining full-wave and circuit simulations
Evaluation of the performances of several four-antenna systems in a reverberation chamber
Reducing Sidelobes from Blocking Struts by Metamaterials Cloaking and Shape Optimization
Mushroom Surface Cloaks for Making Struts Invisible
Tripling Bandwidth of Hat Feed by Genetic Algorithm Optimization
Characterizing FPA-fed reflectors in terms of classical subefficiencies and array methods
Analysis of spherical arrays of microstrip antennas using moment method in spectral domain
Investigation of heavily loaded reverberation chamber for testing of wideband wireless units
Measurements of a 150 to 1700 MHz low loss Eleven feed for the 42 m radio telescope at Green Bank
Single- and dual- band multimode hard horn antennas with partly corrugated walls
Numerical Study of Position and Frequency Stirring in Loaded RC
Realized diversity gain of active DECT phones in talk position measured in reverberation chamber
Overview of the software integration activities within ACE
Compact low-profile decade bandwidth log-periodic folded dipole feed for reflector antennas
Size reduction using strip-type soft surfaces rather than patch-type EBGs
Maximizing the effective diversity gain of two parallel dipoles by optimizing the source impedance
Dual band hard horn for use in cluster-fed multi-beam antennas in Ka-band
Measured radiation properties of a broadband terminal antenna
A multilevel multiregion computation framework for the analysis of antenna structures
European effort towards a unified framework for the analysis of antenna structures
Characterization of mobile terminals in Rayleigh fading by using reverberation chamber
Bandgaps and bandwidths of different soft surfaces used as finite ground planes of small antennas
Decade bandwidth medium gain feed for single or dual reflector antennas
Numerical modelling of reverberation chamber using method of moments and Ewald summation
Moment method computation of miniaturized rectangular hard waveguide with passband and stopband
Comparison of efficiency measurement methods for small antennas
Analysis and measurements of conformal patch array antennas on multilayer circular cylinder
Multi-mode hard horn feeds for Ka-band cluster-fed multi-beam satellite antennas
Spectral domain analysis of dipole coupling over different electromagnetic bandgap structures
Transverse strip arrays used as hard surfaces and AMCs in miniaturized quasi-TEM waveguides
Experimental study of strip dipole FSS-loaded rectangular waveguide
Comparison between bandgaps and bandwidths of back radiation of different narrow soft ground planes
Miniaturized rectangular hard waveguides for use in multi-frequency phased arrays
Round Robin test of active and passive small terminal antennas
Measurements of a 1 to 13 GHz model of a dual polarized low-profile log-periodic feed for US-SKA
Design of hard horn antenna using both single dominant quasi-TEM mode model and mode-matching
Characterization of Antennas and Wireless Terminals in Loaded Reverberation Chambers
Miniaturized dielectric-loaded rectangular waveguides for use in multi-frequency arrays
A novel low-profile log-periodic ultra wideband feed for the dual-reflector antenna of US-SKA
Some properties of an open-ended circular waveguide with one- and two-sided ideal hard walls,
Hard and Soft Gangbuster Surfaces
A solid hand phantom for mobile phones and results of measurements in reverberation chamber
High-efficiency hard horn feeds for cluster-fed reflector antennas