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| MIMO Antenna |
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| GEMS is used to simulate the MIMO antenna that includes two PIFA antennas. The antenna is relatively thin compared to its dimensions in the horizontal directions (550:1). GEMS allows you to use a flat domain and achieve the accurate results. The output parameters are MEG, ECC, S-matrix, total active reflection coefficient, and far field patterns. In this showcase, we also compare the simulation result using the large, mediate and small domains in the z-direction. |
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| The basic design procedure in the simulation: |
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Draw the substrate first and then assign the dielectric material to it |
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Draw an “F” shaped structure |
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Draw a ground and assign it to be PEC |
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Draw a via at one end of the PIFA |
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Draw a line between another end of the PIFA and the ground, and assign it as a lumped port. Assign its group ID to be “1” |
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Select the PIFA, probe and lumped port, and click on the Mirror button in the toolbar to generate an image about the symmetric plane. |
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Change the group ID of the imaged lumped port to “2” |
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Check the “Output far field pattern for each excitation” in the far field parameter setting window |
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Specify the domain size and boundary (PML). |
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Generate the adaptive mesh |
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Specify the convergence criterion |
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Simulate the project using a single PC or cluster |
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| The basic settings in the simulation: |
| Option |
Setting |
Description |
| Boundary |
PML truncates six walls |
Open space problem
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| Excitation |
Lumped port |
Provide a match load for an open port and excitation |
| Mesh |
Non-uniform |
Adaptive mesh |
| Output |
MEG, ECC, S matrix, far field patterns |
Parameters of MIMO antenna |
| Simulation |
A multiple core PC or cluster |
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Dual PIFA Antenna |
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Far Field Patterns |
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S-Parameters |
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ECC |
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Radiation Efficiency |
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MEG |
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3-D Far Field Pattern |
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