dragosr @dragostech.bsky.social · Jun 20 1 / 2
Antenna spiders face issues at LTE freq with crosstalk. Need at least λ/3 separation for -20dB and bad stuff happens below λ/4. λ/2 ideally. Below -8dB separation, and MIMO throughput can drop by 30-50%. Messes with VSWR, and transmission lobes, detuning, shifting impedance. Use external antenna.
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At 2.4GHz, λ is going to be 12.5cm which it looks like they have there. 5GHz it will be half that, around 6cm. What about interference caused by being separated by even λ? (Assuming the cables inside are the same length as propagation in copper is quite a bit slower... (Not an RF Engineer)