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Three 10dB Couplers Compared: Insertion Loss and PIM Test Results – Cavity vs Microstrip vs Stripline
Sep , 29 2026
In DAS indoor distribution systems and RF link designs, the 10dB directional coupler is one of the most frequently used passive components. The two specifications engineers care about most are insertion loss and passive intermodulation (PIM) — the former directly eats into the link budget, the latter determines whether the uplink noise floor can be kept down. There are three main manufacturing tec...
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Multi-Operator DAS: Band Combination Traps That Create Fatal Intermodulation
Oct , 27 2026
The most dangerous scenario in a multi-operator DAS is rarely caused by choosing a component with a poor PIM specification. The real problem often lies in the band plan itself — the frequency relationship between two downlink bands mathematically places intermodulation products inside another operator's uplink receive band. No matter how good the components are, the products land where they land. ...
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