The new series of directional couplers from Knowles’ brand, DLI, provides an example of how high permittivity, temperature stable materials can reduce size/weight and provide excellent performance repeatability.
These small parts are manufactured using DLI’s precision thin film technology and offer a beneficial option for microwave systems in commercial, military and space applications.
Designed for a 50 Ω characteristic impedance, they offer a turnkey surface-mount solution for high-frequency power monitoring. The four-port couplers are excellent for high-frequency signal monitoring applications where board space is at a premium and quality power detection or injection is required. COTS devices covering C, X and Ku bands offer quick turn solutions in a solder surface mount package with flexible PCB feed line configuration. Both 10 dB and 20 dB coupling values are available within each frequency band, both with a common footprint.
The devices are designed to provide high directivity, excellent repeatability and stable frequency over the temperature range -55°C to +125°C. Chip and wire mount devices with the same performance are available, in addition to custom solutions to suit individual size and performance parameters.
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