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2 years ago in Electrical Engineering By Nkumardo

I need to design a 4G MIMO antenna for the 1850–1990 MHz band using Genesys. What’s a logical workflow from initial design to full MIMO parameter extraction?

I'm new to Genesys but need to design a two-element MIMO antenna (e.g., two PIFAs or monopoles) for a handheld device. What are the essential steps? Should I start with a single element in the EM simulator (EM Socket), optimize it for bandwidth and match, then duplicate it and study coupling? How do I properly set up a simulation to extract not just S-parameters but also key MIMO metrics like the Envelope Correlation Coefficient (ECC) and mean effective gain (MEG) within the software? Is there a built-in template or measurement equation setup for this?

All Answers (1 Answers In All)

By Ravneet Singh Answered 3 years ago

Here's the workflow I teach my students using Genesys/PathWave: First, design and optimize a single element (like a PIFA) in the EM Socket for S11 < -10 dB across 1850-1990 MHz. Use the built-in tuning and optimization tools. Second, place two elements in your full device model (including plastic housing and ground plane) with an initial separation (~0.25λ). Third, run a 3D EM simulation to get the full S-parameter matrix (S11, S21, S12, S22) and far-field patterns for each port. Fourth, use the "Measurement Equation" feature to calculate MIMO metrics. For ECC, input the standard formula using either the S-parameters (for low-efficiency antennas) or, more accurately, the radiation field integrals. Genesys can compute this directly if you've simulated the far-field data. Iterate by adding decoupling structures (slits, neutralization lines) if S21 or ECC is too high.

                             

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