Patent ID: 11916514
Assignee: SILICON LABORATORIES INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. An apparatus, comprising:
a radio-frequency (RF) apparatus; and
a wideband multi-band matching balun using passive components to provide simultaneous balun and impedance matching functionality in multiple bands, the wideband multi-band matching balun comprising:
a multi-band balun, the multi-band balun comprising four three-element frequency-dependent resonator (TEFDRs); and
a differential-to-differential matching circuit coupled to the RF apparatus, the differential-to-differential matching circuit comprising:
a series inductor-capacitor (LC) network; and
a pair of TEFDRs, comprising all fixed-value components, coupled to a series LC network,

wherein at least one TEFDR in the multi-band balun, the differential-to-differential matching circuit, or both, provides functionality of an inductor having a frequency-dependent inductance or a capacitor having a capacitance having a frequency-dependent capacitance.