Lecture 10: HPC for Finite Arrays

Transcription

1 Lecture 10: HPC fr Fiite Arrays Release ANSYS HFSS fr Atea Desig ANSYS Ic.

2 Fiite Array Example Mdel This example is iteded t demstrate hw t use HFSS t perfrm fiite array aalysis usig HFSS s fiite array dmai decmpsiti methd DDM Birds-Eye View Tp-Dw View Befre yu start: Yu will eed t cmplete the previus wrkshp: Uit Cell ANSYS Ic.

3 ANSYS Ic. Atea Arrays Phased Array A grup f atea elemets i which the relative amplitudes ad phases are varied t cstruct a effective radiati patter by cstructive ad destructive iterferece Amplitude Phase r jk j array E r e e A E m j m j m S e A e A S m Beam shape ca be ctrlled by adjustig the amplitude f each elemet. Beam ca be steered by applyig a prgressig phase shift acrss the array. Mutual cuplig plays a key rle i a elemet s patter ad iput impedace. It is ecessary t aalyze the arrays perfrmace ver frequecy ad sca vlume.

4 Atea Arrays ad the Uit Cell Uit Cell Fiite Array Uses Master/Slave budaries Mdels a sigle elemet as if it were i a ifiite array evirmet Ifiite array evirmet accuted fr by efrcig field peridicity thrugh master/slave budary pairs Reduces RAM Reduces slve time Ifiite Array Apprx. Edge affects igred Uifrm magitude excitati Sigle sca agle slved at a time Distributed Slve Opti Parallelizes Explicit Etire array aalyzed Accuts fr edge affects ad edge treatmets Prvides mutual cuplig terms Allws magitude taper Mst flexible Fewest assumptis Adaptive meshig perfrmed etire mdel Cmplex Gemetry Every elemet eeds t be draw Large umber f excitatis Cmplicated meshig prcess Fiite Array DDM Uses Master/Slave budaries Etire array aalyzed Accuts fr edge affects Prvides mutual cuplig terms Allws magitude taper Adaptive meshig perfrmed sigle uit cell Distributes RAM Reduces slve time Peridic assumpti Gemetry must be purely peridic i the XY plae ANSYS Ic.

5 Dmai Decmpsiti Overview DDM distributes the mesh ad accesses distributed RAM thrughut a etwrk DDM was first released i HFSSv12 Distributes a mdel s mesh/sluti acrss several cmputers distributig the RAM Slves a mdel s full behavir as if ru a sigle cmputer Geeralized DDM Addresses: RAM limitatis Des t address: Meshig time Cmplex gemetry issues ANSYS Ic.

6 Sluti: Fiite Array Dmai Decmpsiti Utilizes Replicated DDM Uit Cell t Address Array Ccers Gemetry ad Mesh cpied directly frm Uit Cell Mdel Uit Cell gemetry expaded t fiite array thrugh a simple GUI Adaptive Meshig Prcess imprted frm Uit Cell Simulati Dramatically reduces the meshig time assciated with fiite array aalyses. Mesh peridicity reifrces array s peridicity. Full Array Mesh Slved Usig DDM Addresses: RAM limitatis Mesh frm Uit Cell Simulati Meshig time Cmplex gemetry issues ANSYS Ic.

7 Fiite Array DDM Tl Advatages Advatages f the fiite array DDM: Slves much BIGGER arrays the same hardware Obtais ACCURATE results that match HFSS explicit simulatis Eables EFFICIENT simulati f large fiite arrays utilizig dmai decmpsiti DDM Makes it EASY t trasfrm a master/slave uit cell it a fiite array 256 elemet Vivaldi with metal thickess uder 32GB f RAM! Embedded elemet patter: Fiite Array DDM vs. Explicit Parallel Sluti f Dmais ANSYS Ic.

8 Hw It Wrks!!! Start ff with a Uit Cell Mdel t create the Uit Cell Mesh Accuts fr ifiite array behavir Uit Cell Simulati is Fast Uit Cell Simulati is Memry Efficiet May use radiati budary PML r FE-BI tp surface f uit cell Radiati Budary r PML Absrbs Radiated Fields Master / Slave Budary Pairs Mimic Array s Peridicity ANSYS Ic.

9 Hw It Wrks!!! Cstruct the Fiite Array Simple GUI based creati Reduces mdel cmplexity Reduces display issues Creates 1 uit cell f additial space arud the edge elemets t termiate the array fields i vacuum r ifiite grud plae. Defies directis f peridicity based Master / Slave Budaries Defies umber f elemets i each directi ANSYS Ic.

10 Fiite Array DDM vs Explicit: Simulati Time/RAM DDM Explicit Simulati Time RAM Fiite Array DDM 2.75hrs 10.5GB Explicit 6hrs 28GB Nte: May bserve greater RAM ad time savigs with cmplex mdels! ANSYS Ic.

11 Fiite Array DDM vs Explicit: Results Cmparis Fiite Array DDM prvides the same results mre efficietly ANSYS Ic.

12 This page itetially left blak ANSYS Ic.