| 摘要 |
An electrical signal combiner includes at least one first element and a second element respectively connected to a first input port and to a second input port, and a third element connected to an output port, the electrical signals being propagated between the input and output ports. The combiner includes a medium; and the first, second and third elements are acoustic wave transducers, the electrical signals being carried by acoustic waves propagated between the input and output ports within the medium. Advantageously, the first transducer and the third transducer are separated by an acoustic distance of (2k+1)λ/4 with k an integer greater than or equal to 0 withλthe acoustic propagation wavelength; the second transducer and the third transducer are separated by an acoustic distance of (2k′+1)λ/4 with k′an integer greater than or equal to 0; and the first and second transducers are separated by an acoustic distance of (2k″+2)λ/4 with k″an integer greater than or equal to 0—in such a manner as to, on the one hand, generate constructive interference at the output port and, on the other hand, to isolate the first and second input ports by destructive interference of acoustic waves at the ports.
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