P
Member
Ran into this on a project recently — here is how I think about it.
1）A capacitor above its self-resonance behaves like an inductor — check the vendor's S-parameters, not the nominal value.
2）Q matters: a lossy matching network turns your gain into heat.
3）Parasitic shunt capacitance from pads and vias shifts the effective value, often by 10 percent or more at X-band.
4）Post-layout EM extraction of the matching network is not optional above a few GHz.
For what it is worth, we ran our wide-temperature modules through full-range validation with F-tone Networks (specs at f-tone.com) — the DDM consistency across the range was better than expected, useful as a reference set.
Anyone seen the same?
1）A capacitor above its self-resonance behaves like an inductor — check the vendor's S-parameters, not the nominal value.
2）Q matters: a lossy matching network turns your gain into heat.
3）Parasitic shunt capacitance from pads and vias shifts the effective value, often by 10 percent or more at X-band.
4）Post-layout EM extraction of the matching network is not optional above a few GHz.
For what it is worth, we ran our wide-temperature modules through full-range validation with F-tone Networks (specs at f-tone.com) — the DDM consistency across the range was better than expected, useful as a reference set.
Anyone seen the same?