Antenna On Platform - Revision history

Shatch: /* Patch on Hood */

2016-10-18T18:19:14Z

‎Patch on Hood

2016-10-18T18:17:05Z

‎Patch on Roof

2016-10-18T17:56:45Z

‎Patch on Roof

2016-10-18T17:55:22Z

‎Patch on Roof

2016-10-18T17:47:20Z

‎Patch in Freespace

2016-10-18T17:45:20Z

‎Patch on Roof

2016-10-18T17:44:00Z

‎Patch on Roof

2016-10-18T17:43:41Z

‎Patch on Roof

2016-10-18T17:41:48Z

‎Patch on Roof

2016-10-18T17:29:45Z

← Older revision		Revision as of 18:19, 18 October 2016
Line 118:		Line 118:

	=Patch on Hood=		=Patch on Hood=
		+
		+	Simulation Information:
		+
		+	Mesh size: 230 million cells
		+
		+	Farfield Resolution: 2.5 degrees
		+
		+	Simulation Time: 5 hours, 25 minutes
		+
		+	Typical Performance : 320 MCells/s
		+
		+	Power Threshold: -40 dB
		+
		+	Thread Factor: 8

	[[Image:Hood mount.png\|thumb\|left\|400px\|]]		[[Image:Hood mount.png\|thumb\|left\|400px\|]]

@@ Line 90: / Line 90: @@
 The thread factor setting essentially tells the FDTD engine how many CPU threads to use during [[EM.Tempo]]'s time-marching loop. For a given system, some experimentation may be needed to determine the best number of threads to use. In many cases, using half of the available hardware concurrency works well. This comes from the fact that many modern processors often have two cores per memory port. In other words, for many problems, the FDTD solver cannot load and store data from CPU memory quickly enough to use all the available threads or hardware concurrency. The extra threads remain idle waiting for the data, and a performance hit is incurred due to the increased thread context switching. [[EM.Cube]] will attempt use a version of the FDTD engine optimized for use with Intel's AVX instruction set, which provides a significant performance boost.  If AVX is unavailable, a less optimal version of the engine will be used alternatively.
 [[Image:Roof field.png|thumb|left|400px|]]
@@ Line 98: / Line 96: @@
 [[Image:Roof mesh settings.png|thumb|left|400px|]]
 [[Image:Roof patch.png|thumb|left|400px|]]

@@ Line 78: / Line 78: @@
 Mesh size: 220 million cells
 Farfield Resolution: 2.5 degrees
 Simulation Time: 4 hours, 45 minutes
 Typical Performance : 320 MCells/s
 Power Threshold: -40 dB
 Thread Factor: 8

← Older revision		Revision as of 17:55, 18 October 2016
Line 75:		Line 75:
	\|}		\|}

		+	Simulation Information:
		+
		+	Mesh size: 220 million cells
		+	Farfield Resolution: 2.5 degrees
		+	Simulation Time: 4 hours, 45 minutes
		+	Typical Performance : 320 MCells/s
		+	Power Threshold: -40 dB
		+	Thread Factor: 8

← Older revision		Revision as of 17:47, 18 October 2016
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	[[Image:Patch yz cut.png\|thumb\|left\|400px\|]]		[[Image:Patch yz cut.png\|thumb\|left\|400px\|]]
		+
		+	== Computational Environment ==
		+
		+	The Mirage III CAD model has an approximate length of 15m, a wingspan of 8m, and an approximate height of 4.5m. Expressed in free-space wavelengths at 850 MHz, the approximate dimensions of the aircraft model are 42.5 λ<sub>0</sub> x 22.66 λ<sub>0</sub> x 12.75 λ<sub>0</sub>. Thus, for the purposes of [[EM.Tempo]], we need to solve a region of about 12,279 cubic wavelengths. For problems of this size, a very large CPU memory is needed, and a high-performance, multi-core CPU is desirable to reduce the simulation time.
		+
		+	[https://aws.amazon.com/ Amazon Web Services] allows one to acquire high-performance compute instances on demand, and pay on a per-use basis. To be able to log into an Amazon instance via Remote Desktop Protocol (RDP), the [[EM.Cube]] license must allow terminal services. For the purpose of this project, we used a c4.4xlarge instance running Windows Server 2012. This instance has 30 GB of RAM memory, and 16 virtual CPU cores. The CPU for this instance is an Intel Xeon E5-2666 v3 (Haswell) processor.
		+

	<br clear="all"/>		<br clear="all"/>

@@ Line 61: / Line 61: @@
 | 1
 | 3800000
 |}

@@ Line 34: / Line 34: @@
 of Golf Model
 ! scope="col"| &epsilon;<sub>r</sub>
-! scope="col"| &sigma;<sub>r</sub>
+! scope="col"| &sigma;
 |-
 | PEC

@@ Line 31: / Line 31: @@
 |-
 ! scope="col"| Material
-! scope="col"| Relevant Components of Golf Model
+! scope="col"| Relevant Components
-! scope="col"| Relative Permittivity
+of Golf Model
-! scope="col"| Conductivity
+! scope="col"| &epsilon;<sub>r</sub>
 |-
 | PEC
@@ Line 46: / Line 47: @@
 |-
 | Plastic
-| head-light covers, brake-light covers, license plate mounts
+| head-light covers, brake-light covers,
 | 2.2
 | 0.0

← Older revision		Revision as of 17:41, 18 October 2016
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	=Patch on Roof=		=Patch on Roof=
		+
		+	Materials used in car model:
		+
		+	{\| class="wikitable"
		+	\|-
		+	! scope="col"\| Material
		+	! scope="col"\| Relevant Components of Golf Model
		+	! scope="col"\| Relative Permittivity
		+	! scope="col"\| Conductivity
		+	\|-
		+	\| PEC
		+	\| car body
		+	\| 1
		+	\| ∞
		+	\|-
		+	\| Glass
		+	\| car windows
		+	\| 6.5
		+	\| 0.005
		+	\|-
		+	\| Plastic
		+	\| head-light covers, brake-light covers, license plate mounts
		+	\| 2.2
		+	\| 0.0
		+	\|-
		+	\| Rubber
		+	\| tires
		+	\| 2.9
		+	\| 0.005
		+	\|-
		+	\| Aluminum
		+	\| wheel-rims
		+	\| 1
		+	\| 3800000
		+	\|}
		+

	[[Image:Roof field.png\|thumb\|left\|400px\|]]		[[Image:Roof field.png\|thumb\|left\|400px\|]]

← Older revision		Revision as of 17:29, 18 October 2016
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−		+	{{projectinfo\|Application\|Modeling Large Parabolic Reflectors Illuminated By Pyramidal Horn Antennas Using EM.Cube\|Hood nearfield.png\|In this project, large parabolic reflectors fed by pyramidal horn antennas are modeled and analyzed using EM.Illumina and EM.Tempo.\|
		+	*[[EM.Tempo]]
		+	*[[EM.Illumina]]
		+	*Pyramidal Horn
		+	*Parabola
		+	*Object of Revolution
		+	*Field Distribution
		+	*Radiation Pattern
		+	\|All versions\|None }}
	=Patch in Freespace=		=Patch in Freespace=