Signal transmission control device and electronic device including the same
A signal transmission control device may include a device layer including a conductive layer and a dielectric layer disposed on the conductive layer, and a conductive line disposed on the dielectric layer and extending across a first inverted split ring resonator (ISRR) and a second inverted split ring resonator (ISRR). The device layer may define the first ISRR and the second ISRR spaced apart from each other, and a signal transmission characteristic between a first end and a second end of the conductive line may be controlled by the first ISRR and the second ISRR.
1 . A signal transmission control device comprising:
a device layer including a conductive layer and a dielectric layer disposed on the conductive layer, wherein the device layer defines a first inverted split ring resonator (ISRR) and a second inverted split ring resonator (ISRR) that are spaced apart from each other; and
a conductive line disposed on the dielectric layer and extending across the first ISRR and the second ISRR,
wherein a signal transmission characteristic between a first end and a second end of the conductive line is controlled by the first ISRR and the second ISRR, and
wherein the first ISRR has a gap orientation rotated by about 90° with respect to the first end of the conductive line, and the second ISRR has a gap orientation rotated by about 180° with respect to the first end of the conductive line.
2 . The signal transmission control device of claim 1 , wherein the first ISRR and the second ISRR have different resonance frequencies.
3 . The signal transmission control device of claim 2 , wherein:
the first ISRR has a first resonance frequency;
the second ISRR has a second resonance frequency; and
the signal transmission control device has electromagnetically induced transparency (EIT) characteristic in a frequency range between the first resonance frequency and the second resonance frequency.
4 . The signal transmission control device of claim 2 , wherein:
the first ISRR has a first resonant frequency;
the second ISRR has a second resonant frequency; and
the signal transmission control device has a signal transmission characteristic of about 80% or more in a frequency range between the first resonance frequency and the second resonance frequency.
5 . The signal transmission control device of claim 4 , wherein the signal transmission control device has the signal transmission characteristic of about 90% or more in the frequency range between the first resonance frequency and the second resonance frequency.
6 . The signal transmission control device of claim 2 , wherein:
the first ISRR has a first resonance frequency;
the second ISRR has a second resonance frequency; and
the signal transmission control device has an asymmetric signal reflection characteristic depending on a signal transmission direction between the first end and the second end of the conductive line in a frequency range between the first resonance frequency and the second resonance frequency.
7 . The signal transmission control device of claim 1 , wherein transmittivity, reflectivity, and absorptivity of signal transmission between the first end and the second end of the conductive line are adjusted according to a distance between the first ISRR and the second ISRR.
8 . The signal transmission control device of claim 7 , wherein the distance is between a pair of adjacent edges of a first opening pattern of the first ISRR and a second opening pattern of the second ISRR.
9 . The signal transmission control device of claim 7 , wherein the distance is adjusted to make the signal transmission control device have a unidirectional reflectionless absorption characteristic.
10 . The signal transmission control device of claim 9 , wherein the unidirectional reflectionless absorption characteristic is defined as a characteristic having signal reflection of about 10% or less and signal absorption of about 90% or more with respect to a specific direction.
11 . The signal transmission control device of claim 1 , wherein the signal transmission control device has a unidirectional reflectionless absorption characteristic, and
wherein the unidirectional reflectionless absorption characteristic is defined as a characteristic having signal reflection of about 10% or less and signal absorption of about 90% or more with respect to a specific direction.
12 . The signal transmission control device of claim 1 , wherein the first ISRR includes a first opening pattern formed as a shape of a quadrangle split ring in a first region of the conductive layer, and
wherein the second ISRR includes a second opening pattern formed as a shape of a quadrangle split ring in a second region of the conductive layer.
13 . The signal transmission control device of claim 1 , wherein the conductive line is disposed on the first ISRR and the second ISRR to cross a central portion of each of the first ISRR and the second ISRR.
14 . The signal transmission control device of claim 1 , wherein an electrical signal is input to any one of the first end and the second end of the conductive line, and electromagnetic waves are generated in the conductive line by the electrical signal.
15 . An electronic device comprising the signal transmission control device according to claim 1 .