Compensation circuit to mitigate antenna-to-antenna coupling

Circuitry comprising:

• radio frequency circuitry;
• a first antenna;
• a second antenna;
• a first transmit/receive path extending from the radio frequency circuitry to a first antenna port;
• a second transmit/receive path extending from the radio frequency circuitry to a second antenna port;
• and
• a compensation circuit comprising:
• a first inductor and a second inductor coupled in series between the first antenna and the second antenna, wherein the first inductor and the second inductor are negatively coupled with one another and a common node is provided between the first inductor and the second inductor;
• and
• at least one shunt acoustic resonator coupled between the common node and a fixed voltage node, wherein the compensation circuit presents a first negative capacitance between the first antenna and the second antenna over a first frequency range to reduce an effective capacitance presented between the first antenna and the second antenna due to antenna-to-antenna coupling between the first antenna and the second antenna.