ZXHF-K721M+

Overview

The ZXHF-K721M+ is a reflectionless high-pass filter from Mini-Circuits, designed for signal conditioning in RF and microwave applications. It operates within a frequency range of 700 MHz to 5000 MHz. The component utilizes a novel topology that absorbs stop-band signals internally rather than reflecting them back to the source. This design prevents interference with upstream components. The unit features a 2.92mm connector type and is housed in a UK3042 case style. Electrical specifications are defined at 25°C.

Feature Summary

• Employs reflectionless topology to absorb and terminate stop-band signals internally
• Prevents signal reflection back to the source to minimize system interference
• Designed for high-frequency signal conditioning in RF and microwave circuits

Applications

• Aerospace & Defense systems
• S-band Radar applications
• GPS infrastructure

Procurement Notes

Verify the specific datasheet revision and ECO number (e.g., ECO-004934) against your current engineering requirements. Confirm that the 2.92mm connector interface matches your board layout. Ensure the operating temperature range aligns with your environmental conditions. Cross-reference the part number suffix to confirm RoHS compliance status as indicated by the plus sign.

Selection Notes

Select this component when internal termination of out-of-band signals is required to protect sensitive upstream stages. The reflectionless characteristic distinguishes it from standard high-pass filters that reflect energy. Consider the UK3042 package dimensions for mechanical integration. Evaluate insertion loss and return loss parameters from the official S-parameter graphs for your specific frequency band.

Part Context

This model belongs to the ZXHF series of reflectionless filters manufactured by Mini-Circuits. The series covers various frequency bands using similar internal absorption technology. Other models in the family include ZXHF-K581M+ and ZXHF-K14M+, which serve different spectral ranges while maintaining the same core reflectionless functionality and connector standards.

Replacement Considerations

Direct substitutes must match the 700-5000 MHz range and reflectionless topology. Verify compatibility with 2.92mm connectors. Standard reflective high-pass filters are not equivalent replacements due to differing signal handling characteristics. Consult Mini-Circuits for updated revisions or pin-compatible alternatives if the exact model is discontinued.