QuickWave Newsletter 1/2006 - QWEDwhich concerns a cylindrical dielectric resonator placed in a rectangular waveguide. ... NTF transformation in lossy media The near-to-far field transformation

QuickWave Newsletter 1/2006

We are pleased to welcome you to the first QuickWave Newsletter where we will inform about news, coming events and new revisions

of QuickWave software. At the beginning of April, QWED introduced a new radically improved version 6.0 of QuickWave 3D and QuickWave V2D electromagnetic software. The new version replaces version 5.0 released last year. According to our earlier plans, QWED has concentrated on software development from the electromagnetic modelling side, and also on extending its functionality and adequacy for new emerging applications. For example, in response to the optical and semiconductor industry needs, we have implemented Gaussian pulse illumination with finite spot size and models of metamaterials. We have also extended NTF postprocessing to lossy background media and allowed switching off selected NTF walls for validating directions of energy flow in the near field. We will welcome further suggestions by our software users, and in particular, from those interested in non-standard high-frequency problems. We are also open to provide customised software versions or consulting services related to the software application. QWED Team

New features in version 6.0 of QuickWQuickWave version 6.0 rev.4…..………QuickWave version 6.0 rev.3 DEMO…New www website…..…………………Coming Events…..……………………

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1. QW-Editor in Q Version 6.0 of Qframework. It offeof QW-Simulator.available. Please re

A view of bee 2. AMIGO - Adva The most importaformally stands fovery friendly role, it optimises the mwhile avoiding smas well as S-parainformation about:mesh constraints, and allows settingwhich concerns a c

Structure of dielf1of 0.8 m

New features in version 6.0 of QuickWave

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t graphics

W-Editor has been re-implemented within Qt multiplatform C++ rs expanded 3D graphics based on Open GL™ library, like version 5.0 More flexible 3D visualisation, and more convenient dialogues are now fer to QW-Editor Reference Guide, Chapter 2, for details.

fburg example in a 3D window: in wire (left) and fill mode (right)

nced Mesh Intelligent Generation Option

nt element of the new QW-Editor is the AMIGO system. AMIGO r the Advanced Mesh Intelligent Generation Option but it really plays a in accordance with the abbreviated name. It serves two purposes. Firstly, eshing so as to provide requested wavelength resolution in all media

all cells. Secondly, it allows fast setting of frequency ranges for all ports meter and FD-Probing postprocessings. Additionally, it shows useful details of structure definition that cannot be modelled within requested time step forced by the current mesh, expected duration of the analysis, automatic stop criteria. Consider Standard/Dielf/dielf1a.pro example ylindrical dielectric resonator placed in a rectangular waveguide.

a example in a 2D window showing standard meshing with a cell size m (left) and AMIGO generated meshing in example dielf1b.


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AMIGO dialogue for dielf1b example

3. New UDO Browser The new UDO browser takes advantage of Open GL™ library and provides more flexibility in searching for UDO scripts. The library tree and contents are visible at the same time. The number of UDOs shown in each row adjusts to the window size. See Section UG 2.8.1 for description.


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4. New UDO Editor A new built-in text editor for preparing UDO scripts has been implemented in QW-Editor. It highlights UDO commands, comments and constants with different colours. Its Interpret UDO command allows UDO test interpretation without leaving the editor and responds with location of errors and warnings. They can be quickly located due to the line and column numbers of the cursor position being shown. The display can be zoomed and unzoomed, and standard find, replace, cut, copy and paste commands are available through the buttons.

5. New integrated QW-OptimiserPlus A brand new QW-OptimiserPlus has been prepared in version 6.0. It is designed to work with the library of optimisation routines O2DLL_F.dll developed by Dr. L.Opalski of the Warsaw University of Technology and offered by QWED as an option. According to our tests, it is more effective than the old QW-Optimiser and its further intensive developments are planned. The users suggestions regarding new goal functions or output data will be appreciated. QW-OptimiserPlus is fully integrated with QW-Simulator. Thus the View Optimiser Results windows appear in the same way as View Results, and enjoy the same variety of display options. An additional advantage is that the users of standard QuickWave software will not need to learn another interface. QW-OptimiserPlus is configured and activated using Optimiser group of commands briefly discussed in Section S 2.1. Configuration process allows setting up optimisation criteria, variables, and preferences. For an example of application, please refer to Section UG 2.15.


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QWED intends to maintain the old QW-Optimiser, in a sense that it will remain compatible with the forthcoming versions of QuickWave software. However, its technical developments are not planned. The users of QW-Optimiser interested in switching to the new QW-OptimiserPlus are encouraged to contact QWED for favourable upgrading conditions. 7. Gaussian beam excitation Illumination with a plane wave well approximates these physical cases where a spot size of the illuminating wave is larger than the scattering object’s dimensions. There are, however, numerous cases where the actual finite size of the spot must be considered and may be smaller than the object’s dimensions. This happens in measurements and scatterometry techniques. Solutions to the Maxwell equations in free space that provide finite spots are Gaussian beams. The so-called 3D Gaussian beam propagating along a particular dimension focuses in the other two dimensions around a point called a neck centre, creating a Gaussian-shaped spot of size called a neck diameter; it then de-focuses beyond the neck. The so-called 2D Gaussian beam propagates along one dimension, focuses in the second dimension, and remains invariant along the third.


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Both types of Gaussian beams are supported in QW-3D starting with version 6.0. They are generated at the same boxes as previously the plane wave. The choice of the illuminating wave is made at the I/O Ports Parameters level and described in Section UG 2.6.4, together with examples of application. 8. NTF transformation in lossy media The near-to-far field transformation is usually applied in air, being the most typical environment for antennas. However, there are cases when transforming near fields to far fields in homogeneous media other than air is of interest. These may be biomedical applications or other cases of microwave propagation in large bodies. NTF transformation in lossless homogeneous dielectrics was provided in version 5.0, and now in version 6.0 it has been extended to lossy media. The region between the NTF box and absorbing boundaries must be homogeneous but may be filled with a medium of arbitrary permittivity er, permeability µr, conductivity sigma and magnetic loss sigmam. Please refer to Section UG 2.3.6 for examples of application and description of normalisation used.

Postprocessing dialogue (left) obtained after using ntfbkg.udo (right)


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9. Disconnecting NTF walls The principle of near-to-far field transformation requires that the radiating structure be surrounded by a closed surface, unless symmetries are explored. There are, however, cases when we may wish to calculate radiation patterns using only some of the pickup walls. A practical application would be to directly compare simulated and measured results, with near-field measurements taken over a single aperture. Another case is more FDTD-specific: due to numerical dispersion and the necessity to average either electric or magnetic field components across each pickup wall, a wave that physically propagates in one direction may numerically generate a non-physical backward lobe. The amplitude of such a parasitic lobe is usually very small and depends on the FDTD meshing. However, in cases of some high-gain antennas it may be important to know if a backward radiation at the level of -50dB or so is a physical effect or a numerical artifact caused by finite accuracy of the applied computational method. A simple way to verify this is to disconnect the pickup surface “looking” in its direction from NTF transform and to check how the results change. Starting with version 6.0, selected NTF walls may be disconnected from a single transformation, see Section UG 2.3.7 for more details.

10. Radiation pattern 3D in OpenGL window QW-3D software can calculate full 3D radiation patterns, with varying both phi and theta angles. In earlier software versions, these results could be visualised by export to HOOPS 3D Part Viewer for ACIS(c). Starting with version 6.0, an internal OpenGL window has been implemented for this purpose. Besides a variety of display options, it allows scale control and switching between linear and logarithmic scales, see e.g. Section UG 2.3.4.


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11. FD – Monitors A great advantage of QuickWave software is that new windows monitoring time-domain variation of the fields may be open at any time and set to any plane and any component. In some cases, the user may be interested in frequency-domain field magnitudes of just some components and in some sections. So far this has been possible via multiple runs at the selected frequencies. In version 6.0 a new Field Monitor postprocessing has been added. In pulse excitation regime, it Fourier-transforms time-domain fields at pre-selected frequencies, in-pre-defined planes. Example of application is shown in Section UG 2.5.1 and options for display control are described in Section S 2.4.1.

12. Metamaterials Models of dispersive dielectric materials were provided in version 5.0. Now in version 6.0 they have been extended to metamaterials. Metamaterial has electric conductivity Sigma = s [S/m] and magnetic loss SigmaM [W/m] defined analogously as for dielectric isotropic. Its complex permittivity (including series loss) and complex permeability (including series magnetic loss) are given by Debye, Drude or Lorentz dispersion model


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with user-specified parameters, see Section E 2.5.3. Metamaterials may assume effective negative values of permittivity and permeability in certain frequency ranges. They are then called double-negative or left-handed media, and support backward waves with propagation vector oriented in the opposite direction to the Poynting vector.

12. Extended use of RAM and better RAM diagnostics in QW-Simulator With the increasing clock speeds of contemporary processors, it appears that the amount of RAM is often a bottleneck for size of projects that can be analysed. Standard 32 bit applications can address up to 2 GB of RAM, which corresponds to roughly 20 million FDTD cells. Version 6.0 of QW-Simulator has been modified in such a way that it allows addressing 3GB on 32 bit systems, and 4GB on 64 bit systems, hence doubling the size of tractable projects. Note that to take advantage of this new option, the 32 bit system should be set into Physical Address Enable mode (PAE). The forthcoming 64 bit version of QW-Simulator will practically alleviate this limit completely. Version 6.0 also brings better RAM diagnostics. Prior to any major memory allocation, QW Simulator checks availability and issues a warning about possibly insufficient RAM. 13. Scaling of pulses and monitoring power available from the source In earlier versions of QuickWave software, precise scaling of sinusoidal and delta sources was provided, with 1 W of time-maximum of power available at the excitation frequency and wide-band, respectively. In version 6.0 this has been extended to other excitation waveforms. With unity amplitude, all pulses provide 1 W of time-maximum available power at the centre frequency; increasing the amplitude by a factor of A increases the power by A2. Additionally, a new FD-Pavailable postprocessing has been added. It performs Fourier transform of the excitation signal and allows displaying the available power versus frequency. Examples of application are given in Section UG 2.13.3.


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14. Improved approximation of vertical (XZ or YZ) ports for template generation We have found that in previous software versions, some of the conformal mesh information was lost when switching from the 3D model to the 2D one for mode template generation. This deficiency has been corrected in version 6.0. The main consequence is substantially improved accuracy of impedance calculations in horizontal coaxial lines, and the resulting improvement in S-parameter extraction. 15. Extended Simulation Log The Simulation Log window provides information about the simulation progress. In version 6.0 it has been extended and different types of data have been directed onto different tabs. In particular, the Model Files tab allows easy browsing through the relevant files. The Simulation Log contents are saved into one or separate files through appropriate settings in Configure-Preferences. This allows recalling the simulation progress at a later time.


The newest revision of Qu What’s new in QuickWave Global: 1. New version (5.013) of V2. New units available: m a In QW_Editor: 1. Much shorter loading tim2. Correction of BHM rota3. Improving warning mes In QW_Simulator: 1. Correction to setting tem active port layer was "le2. Correction of resuming s3. Correction of Breakpoin4. Improvement of "Save P View Antenna 3D Wind5. Improvement of envelop Mode in View Fields W6. Improvement of loading7. Improvement of drawing8. Speed-up of envelope ca9. Changes regarding dispe In QViewer: 1. Correction of loading em We hope that our users wilregard, and constructive cr
QuickWave version 6.0 rev.4
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ickWave software is QuickWave version 6.0 rev.4.

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plate ports when Z+ boundary is PMC (the uppermost aking" energy backwards) imulation from Freeze *.sfr file for QW-BHM examples ts generation for Save_Line_Envelope task ixmap" and "Copy To Clipboard" for View Fields and ow. e Avr for S=ExH calculation for Vector View with Flat indow

corrupted *.vi3 files NTF in Test Mesh and Test LC Window for V2D examples lculation rsive media and metamaterials

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l enjoy the changes. We would like to hear your feedback in this iticism will also be appreciated!


QuickWave version 6.but it does not enable sany projects in QW-QW-Simulator. QW-Sfull-power version, buin QW-3D manual, alswithout hardware dong The link for downlohttp://www.qwed.com

Via the received link, t quickwave_v60rev3_qwcx_v22rev12_demmanuals_v60rev3_de
QuickWave version 6.0 rev.3 DEMO
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0 rev. 3 DEMO is free and fully operational in terms of the interface, imulating your own examples. It does allow unrestricted creation of Editor, but then such projects cannot be saved or exported to imulator in the DEMO version functions in the same way as in the t only on predefined examples, which include all examples described o available in the DEMO installation. The user can use the software le and time restrictions.

ad QuickWave version 6.0 rev. 3 DEMO can be obtained via .pl.

he following files can be downloaded:

demo.zip – QuickWave 3D/V2D version 6.0 rev. 3 DEMO o.zip – QuickWave COAX version 2.2 rev. 12 DEMO mo.zip – Manuals for QuickWave software

http://www.qwed.com.pl/


Welcome to visit QWED’s newthe users more features and innavigate. A copy of the ohttp://www.qwed.com.pl/OldPag Please note that QWED website

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New www websit
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www website with new and improved design that brings formation. We hope you find the new design easier to ld site for comparison purposes is archived here: e.

is also available at www.qwed.eu.

http://www.qwed.com.pl/OldPagehttp://www.qwed.eu/


MICROWAVE KRA

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QWED will be attending the confeelectromagnetic analysis and designUpon interest, short training course

InEuropean Space

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QWED will be presenting its produ

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QWED will be attending the confeelectromagnetic analysis and design

QWED Sp. z o.o. ul. Piekna 64a m. 11 00-672 Warsaw POLAND

Coming Events

14

AND RADAR WEEK IN POLAND KOW 22-26 MAY 2006

website: http://www.mikon-2006.pl

rence and also exhibiting the QuickWave software for .

s with hands-on software experience will be arranged.

ISD 2006

dustry Space Days Research and Technology Centre dwijk, The Netherlands May 29-31, 2006

bsite: http://www.isd2006.com

cts and competence in the exhibiton booth of Poland.

2006 IEEE MTT-S nal Microwave Symposium Francisco, California e Theory and Techniques Society June 11-16, 2006

ite: http://www.ims2006.org/ims2006.htm

rence and also exhibiting the QuickWave software for . Please come and see us in booth #344.

tel.: (+48) 22 625 73 19 fax.: (+48) 22 621 62 99 optional: (+48) 601 38 64 84email: [email protected]
http://www.mikon-2006.pl/http://www.isd2006.com/http://www.ims2006.org/ims2006.htm

Documents

QuickWave Newsletter 1/2006 - QWEDwhich concerns a cylindrical dielectric resonator placed in a rectangular waveguide. ... NTF transformation in lossy media The near-to-far field transformation