#168 AE1 shunt network series capacitor is not high Q low ESR

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otworzone 4 lat temu przez Michael Schloh von Bennewitz · 0 komentarzy

AE1 shunt network series capacitor is not high Q low ESR

Problem environment

It's likely that a high quality series capacitor carries value in the RF path of an antenna.

Steps to reproduce

  1. Refer to the schematic
  2. Locate AE1 and C99
  3. Review capacitor quality

Expected result

The capacitor selected to populate C99 should be high quality, with a low ESR and high Q value.

Actual result

The C99 capacitor is a standard kind.

Resources

Workaround

Most high quality capacitors are maximum 0603 package sized, so order a small number of them and replace the 0805 standard part with a 0603 high quality one. Test for return loss and modify the design accordingly.

Severity level

This is low priority because project requirements do not specify radio performance.

# AE1 shunt network series capacitor is not high Q low ESR ## Problem environment It's likely that a high quality series capacitor carries value in the RF path of an antenna. ## Steps to reproduce 1. Refer to the schematic 1. Locate AE1 and C99 1. Review capacitor quality ## Expected result The capacitor selected to populate C99 should be high quality, with a low ESR and high Q value. ## Actual result The C99 capacitor is a standard kind. ## Resources * https://www.arrow.com/en/products/06035j1r0bbstr/avx * https://www.digikey.com/en/products/detail/avx-corporation/06035J1R0BBSTR/1277325 ## Workaround Most high quality capacitors are maximum 0603 package sized, so order a small number of them and replace the 0805 standard part with a 0603 high quality one. Test for return loss and modify the design accordingly. ## Severity level This is **low priority** because project requirements do not specify radio performance.
Michael Schloh von Bennewitz dodano etykietę
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4 lat temu
Michael Schloh von Bennewitz dodano etykietę
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