Electronic circuitry
View Patent ↗According to one embodiment, electronic circuitry, includes a first radiating element; a second radiating element; a first circuit element including a first end and a second end, the first end being connected to one end of one of the first radiating element or the second radiating element; and a second circuit element connected between the second end of the first circuit element and one end of another of the first radiating element or the second radiating element.
1. Electronic circuitry, comprising:
a first radiating element;
a second radiating element;
a first circuit element including a first end and second end, the first end being connected to one end of one of the first radiating element or the second radiating element; and
a second circuit element connected between the second end of the first circuit element and one end of another of the first radiating element or the second radiating element,
wherein no other circuit element is provided between
the second circuit element and
the one end of the other of the first radiating element or the second radiating element and,
a reactance of the first circuit element is in a range of 0.5 to 2 times a value of X in the following equation,
X
=
-
(
R
1
2
2
+
X
1
2
2
)
R
2
1
+
(
R
11
R
1
2
+
X
11
X
1
2
)
R
2
2
+
(
R
1
1
X
1
2
-
X
11
R
1
2
)
X
2
2
R
1
2
X
2
2
+
X
1
2
R
2
2
a susceptance of the second circuit element is in a range of 0.5 to 2 times a value of B in the following equation,
B
=
Im
[
-
Z
1
2
(
Z
1
1
+
j
X
)
Z
2
2
-
Z
1
2
Z
2
1
]
[
Z
]
=
[
Z
11
Z
1
2
Z
2
1
Z
2
2
]
=
[
R
1
1
+
jX
1
1
R
1
2
+
jX
1
2
R
2
1
+
jX
21
R
2
2
+
jX
2
2
]
Z 11 is an input impedance of the first radiating element, Z 22 is an input impedance of the second radiating element, Z 21 and Z 12 each are a mutual impedance between the first radiating element and the second radiating element, R 11 , R 12 , R 21 and R 22 are real parts, and X 11 , X 12 , X 21 and X 22 are imaginary parts.
2. The electronic circuitry according to claim 1 , wherein a reactance or a susceptance of the first circuit element and a reactance or a susceptance of the second circuit element are respectively set to values at which
a signal input from the one radiating element to the other radiating element through electromagnetic coupling and a signal input from the second end of the first circuit element to the one end of the other radiating element through the second circuit element are at least partially cancelled, and
a signal input from the other radiating element to the one radiating element through electromagnetic coupling and a signal input from the one end of the other radiating element to the second end of the first circuit element through the second circuit element are at least partially cancelled.
3. The electronic circuitry according to claim 1 , wherein each of the first circuit element and the second circuit element includes a coil, a capacitor, series connection of a coil and a capacitor, or parallel connection of a coil and a capacitor.
4. The electronic circuitry according to claim 1 , wherein the first circuit element and the second circuit element are chip components.
5. The electronic circuitry according to claim 1 , further comprising a first matching circuit connected to the second end of the first circuit element and configured to reduce a reflected wave from the one radiating element.
6. The electronic circuitry according to claim 5 , wherein
the first matching circuit at least includes a third circuit element and a fourth circuit element,
the fourth circuit element includes one end connected to the second end of the first circuit element, and
the third circuit element includes one end connected to the one end or another end of the fourth circuit element, and includes another end connected to a reference voltage.
7. The electronic circuitry according to claim 5 , wherein the first matching circuit includes one or more chip components.
8. The electronic circuitry according to claim 1 , further comprising a second matching circuit connected to the one end of the other radiating element, and configured to reduce a reflected wave from the other radiating element.
9. The electronic circuitry according to claim 8 , wherein
the second matching circuit at least includes a fifth circuit element and a sixth circuit element;
the sixth circuit element includes one end connected to the one end of the other radiating element, and
the fifth circuit element includes one end connected to the one end or another end of the sixth circuit element, and includes another end connected to a reference voltage.
10. The electronic circuitry according to claim 8 , wherein the second matching circuit includes one or more chip components.
11. The electronic circuitry according to claim 1 , further comprising:
a first matching circuit connected to the second end of the first circuit element and configured to reduce reflected waves from the one radiating element; and
a second matching circuit connected to the one end of the other radiating element and configured to reduce reflected waves from the other radiating element.
12. The electronic circuitry according to claim 11 , wherein
the first matching circuit at least includes a third circuit element and a fourth circuit element,
the fourth circuit element includes one end connected to the second end of the first circuit element,
the third circuit element includes one end connected to the one end or another end of the fourth circuit element, and includes another end connected to a reference voltage,
the second matching circuit at least includes a fifth circuit element and a sixth circuit element,
the sixth circuit element includes one end connected to the one end of the other radiating element, and
the fifth circuit element includes one end connected to the one end or another end of the sixth circuit element, and includes another end connected to the reference voltage.
13. The electronic circuitry according to claim 11 , wherein each of the first matching circuit and the second matching circuit includes one or more chip components.
14. The electronic circuitry according to claim 1 , further comprising a wireless circuit connected to the second end of the first circuit element and one end of the other radiating element.
15. The electronic circuitry according to claim 14 , further comprising a switch configured to selectively connect the wireless circuit to the second end of the first circuit element or the one end of the other radiating element.
16. The electronic circuitry according to claim 14 , wherein the wireless circuit is configured to perform sensing of a measurement object by transmitting a measurement signal to the measurement object through at least one of the first radiating element and the second radiating element, and receiving a reflection signal from the measurement object through at least one of the first radiating element and the second radiating element.
17. The electronic circuitry according to claim 14 , wherein the wireless circuit performs wireless communication with another wireless communication device by transmitting/receiving a radio signal through at least one of the first radiating element and the second radiating element.