Signal transmission device, filter, and inter-substrate communication device

1. A signal transmission device comprising:

a first and a second substrates disposed facing each other in a first direction with a space therebetween;

a first resonator including a plurality of first open-ended resonators and a single or a plurality of second open-ended resonators, the plurality of first open-ended resonators being formed in a first region of the first substrate and being electromagnetically coupled to each other in the first direction, the single or the plurality of second open-ended resonators being formed in a region of the second substrate corresponding to the first region, and the plurality of second open-ended resonators being electromagnetically coupled to each other in the first direction; and

a second resonator electromagnetically coupled to the first resonator, the second resonator performing signal transmission between the first resonator and the second resonator through the electromagnetic coupling therebetween, wherein

the plurality of first open-ended resonators include a first first-open-ended resonator and a second first-open-ended resonator, open ends of the first first-open-ended resonator facing a central portion of the second first-open-ended resonator, a central portion of the first first-open-ended resonator facing open ends of the second first-open-ended resonator,

when the plurality of second open-ended resonators are employed, the plurality of second open-ended resonators include a first second-open-ended resonator and a second second-open-ended resonator, open ends of the first second-open-ended resonator facing a central portion of the second second-open-ended resonator, a central portion of the first second-open-ended resonator facing open ends of the second second-open-ended resonator, and

the first open-ended resonator and the second open-ended resonator in closest proximity to each other in the first resonator are arranged such that the respective open ends thereof face each other and the respective central portions thereof face each other.

2. The signal transmission device according to claim 1 , wherein

the second resonator includes a plurality of third open-ended resonators and a single or a plurality of fourth open-ended resonators, the plurality of third open-ended resonators being formed in a second region of the first substrate and being electromagnetically coupled to each other in the first direction, the single or the plurality of fourth open-ended resonators being formed in a region of the second substrate corresponding to the second region, and the plurality of fourth open-ended resonators being electromagnetically coupled to each other in the first direction,

the third open-ended resonators include a first third-open-ended resonator and a second third-open-ended resonator, open ends of the first third-open-ended resonator facing a central portion of the second third-open-ended resonator, a central portion of the first third-open-ended resonator facing open ends of the second third-open-ended resonator,

when the plurality of fourth open-ended resonators are employed, the plurality of fourth open-ended resonators include a first fourth-open-ended resonator and a second fourth-open-ended resonator, open ends of the first fourth-open-ended resonator facing a central portion of the second fourth-open-ended resonator, a central portion of the first fourth-open-ended resonator facing open ends of the second fourth-open-ended resonator, and

the third open-ended resonator and the fourth open-ended resonator in closest proximity to each other in the second resonator are arranged such that the respective open ends thereof face each other and the respective central portions thereof face each other.

3. The signal transmission device according to claim 2 , further comprising:

a first signal-lead electrode fowled in the first substrate, the first signal-lead electrode being physically and directly connected to one of the plurality of first open-ended resonators, or being electromagnetically coupled to one of the plurality of first open-ended resonators while providing a spacing between the first signal-lead electrode and the first resonator; and

a second signal-lead electrode formed in the second substrate, the second signal-lead electrode being physically and directly connected to the single fourth open-ended resonator or to one of the plurality of fourth open-ended resonators, or being electromagnetically coupled to the single fourth open-ended resonator or one of the plurality of fourth open-ended resonators while providing a spacing between the second signal-lead electrode and the second resonator, wherein

the signal transmission device performs signal transmission between the first substrate and the second substrate.

4. The signal transmission device according to claim 2 , further comprising:

a first signal-lead electrode formed in the second substrate, the first signal-lead electrode being physically and directly connected to the single second open-ended resonator or to one of the plurality of second open-ended resonators, or being electromagnetically coupled to the single second open-ended resonator or to one of the plurality of second open-ended resonators while providing a spacing between the first signal-lead electrode and the first resonator; and

a second signal-lead electrode formed in the second substrate, the second signal-lead electrode being physically and directly connected to the single fourth open-ended resonator or to one of the plurality of fourth open-ended resonators, or being electromagnetically coupled to the single fourth open-ended resonator or to one of the plurality of fourth open-ended resonators while providing a spacing between the second signal-lead electrode and the second resonator, wherein

the signal transmission device performs signal transmission within the second substrate.

5. The signal transmission device according to claim 2 , wherein,

when the plurality of first open-ended resonators and the single or plurality of second open-ended resonators are electromagnetically coupled to each other in a hybrid resonance mode, the first resonator acts as a coupled resonator collectively resonating at a first resonance frequency, and when the first and the second substrates are spaced from each other to fail to be electromagnetically coupled to each other, each of an independent resonance frequency of the plurality of first open-ended resonators and an independent resonance frequency of the plurality of second open-ended resonators is different from the first resonance frequency, and

when the plurality of third open-ended resonators and the single or the plurality of fourth open-ended resonators are electromagnetically coupled to each other in the hybrid resonance mode, the second resonator acts as a coupled resonator collectively resonating at the first resonance frequency, and when the first and the second substrates are spaced from each other to fail to be electromagnetically coupled to each other, each of an independent resonance frequency of the plurality of third open-ended resonators and an independent resonance frequency of the plurality of fourth open-ended resonators is different from the first resonance frequency.

6. A filter comprising:

a first and a second substrates disposed facing each other in a first direction with a space therebetween;

a first resonator including a plurality of first open-ended resonators and a single or a plurality of second open-ended resonators, the plurality of first open-ended resonators being formed in a first region of the first substrate and being electromagnetically coupled to each other in the first direction, the single or the plurality of second open-ended resonators being formed in a region of the second substrate corresponding to the first region, and the plurality of second open-ended resonators being electromagnetically coupled to each other in the first direction; and

a second resonator electromagnetically coupled to the first resonator, the second resonator performing signal transmission between the first resonator and the second resonator through the electromagnetic coupling therebetween, wherein

the plurality of first open-ended resonators include a first first-open-ended resonator and a second first-open-ended resonator, open ends of the first first-open-ended resonator facing a central portion of the second first-open-ended resonator, a central portion of the first first-open-ended resonator facing open ends of the second first-open-ended resonator,

when the plurality of second open-ended resonators are employed, the plurality of second open-ended resonators include a first second-open-ended resonator and a second second-open-ended resonator, open ends of the first second-open-ended resonator facing a central portion of the second second-open-ended resonator, a central portion of the first second-open-ended resonator facing open ends of the second second-open-ended resonator, and

the first open-ended resonator and the second open-ended resonator in closest proximity to each other in the first resonator are arranged such that the respective open ends thereof face each other and the respective central portions thereof face each other.

7. An inter-substrate communication device comprising:

a first and a second substrates disposed facing each other in a first direction with a space therebetween;

a first resonator including a plurality of first open-ended resonators and a single or a plurality of second open-ended resonators, the plurality of first open-ended resonators being formed in a first region of the first substrate and being electromagnetically coupled to each other in the first direction, the single or the plurality of second open-ended resonators being formed in a region of the second substrate corresponding to the first region, and the plurality of second open-ended resonators being electromagnetically coupled to each other in the first direction;

a second resonator including a plurality of third open-ended resonators and a single or a plurality of fourth open-ended resonators, the plurality of third open-ended resonators being formed in a second region of the first substrate and being electromagnetically coupled to each other in the first direction, the single or the plurality of fourth open-ended resonators being formed in a region of the second substrate corresponding to the second region, the plurality of fourth open-ended resonators being electromagnetically coupled to each other in the first direction, and the second resonator being electromagnetically coupled to the first resonator to perform signal transmission between the first resonator and the second resonator;

a first signal-lead electrode formed in the first substrate, the first signal-lead electrode being physically and directly connected to one of the plurality of first open-ended resonators, or being electromagnetically coupled to one of the plurality of first open-ended resonators while providing a spacing between the first signal-lead electrode and the first open-ended resonator; and

a second signal-lead electrode formed in the second substrate, the second signal-lead electrode being physically and directly connected to one of the plurality of fourth open-ended resonators, or being electromagnetically coupled to one of the plurality of the fourth open-ended resonators while providing a spacing between the second signal-lead electrode and the fourth open-ended resonator, wherein

the plurality of first open-ended resonators include a first first-open-ended resonator and a second first-open-ended resonator, open ends of the first first-open-ended resonator facing a central portion of the second first-open-ended resonator, a central portion of the first first-open-ended resonator facing open ends of the second first-open-ended resonator,

when the plurality of second open-ended resonators are employed, the plurality of second open-ended resonators include a first second-open-ended resonator and a second second-open-ended resonator, open ends of the first second-open-ended resonator facing a central portion of the second second-open-ended resonator, a central portion of the first second-open-ended resonator facing open ends of the second second-open-ended resonator,

the plurality of third open-ended resonators include a first third-open-ended resonator and a second third-open-ended resonator, open ends of the first third-open-ended resonator facing a central portion of the second third-open-ended resonator, a central portion of the first third-open-ended resonator facing open ends of the second third-open-ended resonator,

when the plurality of fourth open-ended resonators are employed, the plurality of fourth open-ended resonators include a first fourth-open-ended resonator and a second fourth-open-ended resonator, open ends of the first fourth-open-ended resonator facing a central portion of the second fourth-open-ended resonator, a central portion of the first fourth-open-ended resonator facing open ends of the second fourth-open-ended resonator,

the first open-ended resonator and the second open-ended resonator in closest proximity to each other in the first resonator are arranged such that the respective open ends thereof face each other and the respective central portions thereof face each other,

the third open-ended resonator and the fourth open-ended resonator in closest proximity to each other in the second resonator are arranged such that the respective open ends thereof face each other and the respective central portions thereof face each other, and

the inter-substrate communication device performs signal transmission between the first substrate and the second substrate.