Passband filter combining two sets of components

A radio-frequency module comprising:

• a packaging substrate configured to receive a plurality of devices;
• and
• a die mounted on the packaging substrate, the die having a radio frequency passband filter, the passband filter having a series branch, the series branch including:
• a set of one or more resonators having a resonant frequency sufficiently away from the passband of the filter such that spurious modes, of the set of one or more resonators, that are associated with the resonant frequency are outside of the passband of the filter;
• and
• a set of one or more reactive components in series with the set of one or more resonators, the set of one or more reactive components having a resonant frequency sufficiently away from the passband of the filter such that the spurious modes of the set of one or more reactive components, that are associated with the resonant frequency are outside of the passband, and such that the resulting combined resonant frequency of the series combination of the set of one or more resonators and the set of one or more reactive components is within the passband of the filter.

A wireless mobile device comprising:

• one or more antennas;
• and
• a radio-frequency module that communicates with the one or more antennas, the radio-frequency module having a die including a radio frequency passband filter with a series branch, the series branch having:
• a set of one or more resonators having a resonant frequency sufficiently away from the passband of the filter such that spurious modes, of the set of one or more resonators, that are associated with the resonant frequency are outside of the passband of the filter;
• and
• a set of one or more reactive components in series with the set of one or more resonators, the set of one or more reactive components having a resonant frequency sufficiently away from the passband of the filter such that the spurious modes of the set of one or more reactive components, that are associated with the resonant frequency are outside of the passband, and such that the resulting combined resonant frequency of the series combination of the set of one or more resonators and the set of one or more reactive components is within the passband of the filter.