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Petros Zimourtopoulos

Petros Zimourtopoulos
Antennas Research Group ARG IAOI NFI Austria EU · Laboratory

Mathematics PS, Electrical Engineering PhD, Electronics MS, Physics BS
On the Foundations of Measurements - Commensurable Beings, Objects, and Things - Incommensurableness

About

30
Publications
12,067
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42
Citations
Introduction
oe3zzp | sv7bax - rid as ten asss prof of antennas at some eece univ dept - extra-academic private research - ftp#j funktechnikplus # journal - otoiser open transactions on independent scientific engineering research - arg antennas research group iaoi informal association of individuals nfi no finance involved - austria - eu -

Publications

Publications (30)
Article
Full-text available
Two software tools were developed to compute and illustrate the uncertainty estimation of one-port VNA measurements using Complex Differential Error Regions, DERs, and their corresponding Differential Error Intervals, DEIs, in polar and rectangular form. The first tool, [REGION], was written in Open Watcom FORTRAN F77 Compiler as a Command Line Int...
Technical Report
Full-text available
[ToyVNA] ~ [LabVNA] : Comparison : [NanoVNA] ~ [HP 8505A]
Article
Full-text available
The radiation characteristics of Hentenna is the objective of this paper. Furthermore, the analytical study of antenna pattern, as well as, the simulation results for both electric and electromagnetic characteristics (Input Impedance, Standing Wave Ratio SWR, Antenna Pattern and Directivity) are presented. A thorough research using 465 simulation m...
Article
Full-text available
Based on the analysis presented by the authors in their previous work for end-fed space arrays, where an application to geometrically uniform self-standing linear arrays of parallel dipoles was given, this paper presents the results of a single driving-point, self-standing, fully uniform linear array , that is one which has electrical uniformity, a...
Article
Full-text available
This paper demonstrates the way of how the value of any quantity used in Microwaves and RF and defined, either directly or indirectly, by one ore more complex differentiable functions of one or more Vector Network Analyzer VNA measurements, is affected by its ubiquitous Differential Errors DEs, when these DEs are expressed in terms of the manufactu...
Article
Full-text available
The most accurate full two-port calibration of a VNA Vector Network Analyzer requires a Direct or Zero–Length Through connection. However, it is not uncommon at all to have one or two cables and a DUT Device Under Test with incompatible connectors, either of different type or of the same type/sex, which enforce then the use of some kind of barrel o...
Article
Full-text available
tlnomiva] is a visual software application developed by the authors for a transmission line characterization from the user's point of view. The numerical computations are based on the precise formulation within the distributed circuit coefficients model of a transmission line, which was theoretically developed by the authors and published in a prev...
Article
Full-text available
In order to investigate the ability of pattern analysis and RICHWIRE simulation we usually use, to further handle antenna designs under certain extreme geometric conditions, we set up a number of limiting cases of our Delta-Cross loop, an antenna shape which we devised for the additional purpose of this research. Specifically, we vary the wire radi...
Article
Full-text available
A planar Delta—Cross shaped loop antenna is proposed. The presentation includes results from an analytic study of the radiation pattern, as well as, from a simulation study for both the electric and radiation characteristics: input impedance , standing wave ratio, radiation pattern and directivity. The loop was initially shaped as 4 non-overlapping...
Article
Full-text available
This paper introduces the FLOSS Free Libre Open Source Software [VEMSA3D], a contraction of "Visual Electromagnetic Simulator for 3D Antennas", which are geometrically modeled, either exactly or approximately, as thin wire polygonal stru-ctures; presents its GUI Graphical User Interface capabilities, in interactive mode and/or in handling suitable...
Article
Full-text available
This paper briefly highlights the features of the software tool [RadPat4W], named after Radiation Patterns for Windows, that is based on an alternative exposition of fundamental Antenna Theory. This stand-alone application is compatible with the [Wine] environment of Linux and is part of a freeware suite, which is under active development for many...
Article
Full-text available
The array factor of a both geometrically and electrically uniform array is the simple formula for the complex geometric progression sum. This fact, although results in the simplest of all possible analytical designs, obviously does not in the least simplify the complicated practical problem of feeding the array elements using multiple driving point...
Article
Full-text available
Based on the experience we have gained so far, as independent reviewers, we thought that may be proved useful to publicly share with the interested author, especially the young one, some practical implementations of our ideas for the interactive representation of data using 3D/4D movement and animation , in an attempt to motivate and support him in...
Article
Full-text available
In order to demonstrate the usefulness of the only one existing method for systematic error estimation in VNA (Vector Network Analyzer) measurements by using complex DERs (Differential Error Regions), we compare one-port VNA measurements after the two well-known calibration techniques: the quick reflection response, that uses only a single S (Short...
Conference Paper
http://www.npl.co.uk/networks/electromagnetics-network/anamet-past-meetings
Conference Paper
Full-text available
Based on the experience we have gained so far, as independent reviewers of Radioengineering journal, we thought that may be proved useful to publicly share with the interested author, especially the young one, some practical implementations of our ideas for the interactive representation of data using 3D/4D movement and animation, in an attempt to...
Conference Paper
Full-text available
In order to demonstrate the usefulness of the only one existing method for systematic error estimations in VNA (Vector Network Analyzer) measurements by using complex DERs (Differential Error Regions), we compare one-port VNA measurements after the two well-known calibration techniques: the quick reflection response, that uses only a single S (Shor...
Article
Full-text available
In order to demonstrate the usefulness of the only one existing method for systematic error estimations in VNA (Vector Network Analyzer) measurements by using complex DERs (Differential Error Regions), we compare one-port VNA measurements after the two well-known calibration techniques: the quick reflection response, that uses only a single S (Shor...
Article
Full-text available
Based on the experience we have gained so far, as independent reviewers of Radioengineering journal, we thought that may be proved useful to publicly share with the interested author, especially the young one, some practical implementations of our ideas for the interactive representation of data using 3D/4D movement and animation, in an attempt to...
Article
Full-text available
This paper introduces the FLOSS Free Libre Open Source Software [VEMSA3D], a contraction of "Visual Electromagnetic Simulator for 3D Antennas", which are geometrically modeled, either exactly or approximately, as thin wire polygonal structures; presents its GUI Graphical User Interface capabilities, in interactive mode and/or in handling suitable f...
Article
Full-text available
The array factor of a both geometrically and electrically uniform array is the simple formula for the complex geometric progression sum. This fact, although results in the simplest of all possible analytical designs, obviously does not in the least simplify the complicated practical problem of feeding the array elements using multiple driving point...
Article
Full-text available
This paper briefly highlights the features of the software tool [RadPat4W], named after Radiation Patterns for Windows but also compatible with the [Wine] environment of Linux. The tool is a stand-alone part of a freeware suite that is based on an alternative exposition of fundamental Antenna Theory and is under active development for many years no...
Conference Paper
Full-text available
After "Building Complex Differential Error Regions" for two-port calibration VNA measurements, in 30th ANAMET meeting, we are considering now the case of Non-Zero Length Thru or indirect Thru with SLOT calibration for either case of same type/sex connectors or different type connectors, on both ports.
Conference Paper
Full-text available
http://www.npl.co.uk/events/measurement-network-event/anamet-meeting-31
Conference Paper
Full-text available
It is impossible to analytically estimate real uncertainties directly from complex differential errors - Real rectangular uncertainties are estimated from the orthogonal circumscribed about the complex DER - Real polar uncertainties are estimated from the annular sector circumscribed about the complex DER - The proposed method of uncertainty estima...
Article
Full-text available
An analytical method was developed to estimate uncertainties in full two-port Vector Network Analyzer measurements, using total differentials of S-parameters. System error uncertainties were also estimated from total differentials involving two triples of standards, in the Direct Through connection case. Standard load uncertainties and measurement...
Article
Full-text available
The objective was to study uncertainty in antenna input impedance resulting from full one-port Vector Network Analyzer (VNA) measurements. The VNA process equation in the reflection coefficient ρ of a load, its measurement m and three errors Es, determinable from three standard loads and their measurements, was considered. Differentials were sel...
Article
Full-text available
Since S-parameter measurements without uncertainty cannot claim any credibility, the uncertainties in full two-port Vector Network Analyser (VNA) measurements were estimated using total complex differentials (Total Differential Errors). To express precisely a comparison relation between complex differential errors, their differential error regions...
Article
Full-text available
The wide band of frequencies that includes all those allocated to 2G/3G applications was defined as 2G/3G band and the discone antenna with a structure of radial wires was defined as radial discone. This antenna was theoretically analysed and software simulated with the purpose of computationally design a broadband model of it. As an application, a...
Article
Full-text available
An analytical method was developed to estimate errors in quantities depended on full one-port vector network analyser (VNA) measurements using differentials and a complex differential error region (DER) was defined. To evaluate the method, differences instead of differentials were placed over a DER which was then analysed and compared with another...

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Projects

Projects (3)
Project
See below : [Project Log] #108 : A Proposed Pre-Virtual 2-Port of NanoVNA-0.6.0 https://groups.io/g/nanovna-users/message/11185 Hello, Allow us, please, to propose--FACUPOV in our SOW--the following 4-port as - (c) gin&pez@arg (cc-by-4.0) 2019 : start - the Pre-Virtual 2-Port of NanoVNA-0.6.0: https://www.op4.eu/nvu/2020.02.22/NanoVNA.Pre.Virtual.2.Port.gpa.cc.by.4.i.2020.png - finish : (c) gin&pez@arg (cc-by-4.0) 2019 - Sincerely, gin&pez@arg REFERENCE #92.2 : Our General Picture of [TheLeastVNA] - Update 2: 1 January 2020 - https://groups.io/g/nanovna-users/message/9026 :108# On the Classification of [NanoVNA System] - It Belongs Exactly to that Class of VNA Systems which Measure the -101-Nominal Value of the Loads: https://groups.io/g/nanovna-users/message/10540 REPORT https://www.researchgate.net/publication/336286971_ToyVNA_LabVNA_Comparison_NanoVNA_HP_8505A NanoVNA ~ VNA : [#97] On our Comparison of our [NanoVNA] with our [HP 8505A] Using the Ultimate Criterion of Cross-Ratios: https://groups.io/g/nanovna-users/message/8763 Modulus: https://www.op4.eu/nvu/2019.12.29-97/Ratio-of-Cross-Ratios-Modulus--NanoVNA-to-HP-8505A-c.gza.cc.by.4.i.2019.png Argument: https://www.op4.eu/nvu/2019.12.29-97/Ratio-of-Cross-Ratios-Argument-NanoVNA-to-HP-8505A-c.gza.cc.by.4.i.2019.png NanoVNA ~ VNA : Comparison: https://acomelectronics.com/forum/viewtopic.php?p=1308#p1308
Project
FUNKTECHNIKPLUS # JOURNAL http://www.otoiser.org/ A Small European Journal in the Defense of Honesty in Science and Ethics in Engineering A Volunteer, Self-Funded, Publication by Antennas Research Group - A Not-for-Profit Association of Individuals
Project
/f/l/o/s/s/ support for antenna theory - analysis - design - construction - installation - measurements