Surface acoustic wave filter having balanced crosstalk capacitances in symmetric operation

A surface acoustic wave filter that can be operated symmetrically, comprising:

• an input IDT transducer;
• an output IDT transducer;
• said input IDT transducer and said output IDT transducer being electromagnetically coupled and split into partial transducers;
• said IDT transducers having electrical connection pads and ports;
• at least one pair of said partial transducers being connected in parallel;
• said partial transducers and said electrical connection pads being disposed to make, in the case of symmetric operation, crosstalk capacitances between adjacent ones of said pads and said IDT transducers approximately equal in amount at a corresponding one of said ports and at voltages of opposite polarity for balancing the crosstalk capacitances;
• and
• at least one of said input and output IDT transducers being split transversely into said partial transducers.

A surface acoustic wave filter that can be operated symmetrically, comprising:

• an input IDT transducer;
• an output IDT transducer;
• said input IDT transducer and said output IDT transducer being electromagnetically coupled and split into pairs of partial transducers;
• said IDT transducers having electrical connection pads and ports;
• one of said pairs of said partial transducers being connected in parallel and the other of said pairs of said partial transducers being connected in series;
• and
• said partial transducers and said electrical connection pads disposed to make, in the case of symmetric operation, crosstalk capacitances between adjacent ones of said pads and said IDT transducers approximately equal in amount at a corresponding one of said ports and at voltages of opposite polarity for balancing the crosstalk capacitances.