Rf360 Singapore Pte. Ltd.

Epcos Ag

Gerhard Kloska

Andreas Bergmann

Maximilian Pitschi

Armin Schober

Robert Koch

Volker Schulz

Philipp Schwegler

Ibrahim Mehinovic

Jiman Yoon

Jürgen Kiwitt

Aspects of the disclosure relate to wireless communication, and high-frequency filters with resonators. One example is a frequency band filter circuit having a split resonator. The split resonator comprises a resonator including a first section of a shared input busbar, a first section of a shared output busbar, and an electrode structure between the first section of the shared input busbar and the first section of the shared output busbar, the electrode structure configured for a resonance. The split resonator also comprises a detuned resonator. The detuned resonator includes a second section of the shared input busbar, a second section of the shared output busbar, and a detuned electrode structure between the second section of the shared input busbar and the second section of the shared output busbar, the detuned electrode structure configured for a detuned resonance different from the resonance.

Electroacoustic filter including split resonator with detuning

Aspects of the disclosure relate to wireless communication, and high-frequency filters with resonators configured to systematically modify phase characteristics of an antenna reflection coefficient. One example is a wireless communication apparatus for a multi-band system comprising a frequency band filter circuit having a filter passband that includes a first band of the multi-band system. The frequency band filter circuit comprises a plurality of resonators coupled between an antenna port and a signal port and a resonant structure electrically coupled to the plurality of resonators. The resonant structure has a resonance outside of the first band and a second band of the multi-band system, the resonance being closer to the second band than to the first band.

Electroacoustic filter with modified phase characteristics

A resonator filter working with surface acoustic waves is disclosed. The transfer function of this filter features a phase rotation of at least 400&#xb0; within a passband.

Resonator filter working with surface acoustic waves

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Rosenheim, Germany

Gerhard Kloska