# Petros ZimourtopoulosAntennas Research Group ARG IAOI NFI Austria EU · Laboratory

Petros Zimourtopoulos

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 -

**Skills and Expertise**

## Publications

Publications (30)

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...

[ToyVNA] ~ [LabVNA] : Comparison : [NanoVNA] ~ [HP 8505A]

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

http://www.npl.co.uk/networks/electromagnetics-network/anamet-past-meetings

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...

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...

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...

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...

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...

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...

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...

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.

http://www.npl.co.uk/events/measurement-network-event/anamet-meeting-31

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...

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...

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 ÃÂ of a load, its measurement m and three errors Es, determinable from three standard loads and their measurements, was considered. Differentials were sel...

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...

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...

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...

## Projects

Projects (3)

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

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

/f/l/o/s/s/ support for antenna theory - analysis - design - construction - installation - measurements