Vehicular power line communication system and transmitter
First Claim
1. A vehicular power line communication system comprising:
- a transmitter including a pair of twisted wires, whose ends are connected to each other to be loop-shaped, as a power line and a communication line, the transmitter superimposing a high-frequency signal on the pair of twisted wires to transmit electric power and a signal;
a receiver including (i) an aperture antenna being loop-shaped and (ii) a circuit, the aperture antenna forming electromagnetic induction connection with an electromagnetic field generated in the pair of twisted wires according to electric currents flowing in the pair of twisted wires to receive high-frequency electric power of the pair of twisted wires, the circuit operating by using the electric power transmitted from the transmitter; and
a matching circuit including a capacitor that is connected in series or parallel to the pair of twisted wires and/or the aperture antenna,wherein the aperture antenna of the receiver includes an opening area that is opposite to an opening area between a plurality of twisted portions of the pair of twisted wires.
1 Assignment
0 Petitions
Accused Products
Abstract
An opening area between twisted portions of a pair of twisted wires is arranged to be opposite to an opening area of an aperture antenna of each of communication apparatuses. Thus, the use of the pair of twisted wires permits division of electric power among the communication apparatuses and also communication of signals. In particular, among the opening areas between the twisted portions of the pair of twisted wires, only an opening area, which is in between the twisted portion and the twisted portion and is opposite to the aperture antenna, is formed to be larger than a different opening area. This provides a vehicular power line communication system and a transmitter in the system; the system strengthens electromagnetic induction connection between the transmitter and the receiver to permit power line communication.
5 Citations
11 Claims
-
1. A vehicular power line communication system comprising:
-
a transmitter including a pair of twisted wires, whose ends are connected to each other to be loop-shaped, as a power line and a communication line, the transmitter superimposing a high-frequency signal on the pair of twisted wires to transmit electric power and a signal; a receiver including (i) an aperture antenna being loop-shaped and (ii) a circuit, the aperture antenna forming electromagnetic induction connection with an electromagnetic field generated in the pair of twisted wires according to electric currents flowing in the pair of twisted wires to receive high-frequency electric power of the pair of twisted wires, the circuit operating by using the electric power transmitted from the transmitter; and a matching circuit including a capacitor that is connected in series or parallel to the pair of twisted wires and/or the aperture antenna, wherein the aperture antenna of the receiver includes an opening area that is opposite to an opening area between a plurality of twisted portions of the pair of twisted wires. - View Dependent Claims (3, 5, 6, 8, 10)
-
-
2. A vehicular power line communication system comprising:
-
a transmitter including a loop coil as a power line and a communication line, the transmitter superimposing a high-frequency signal on the loop coil to transmit electric power and a signal; a receiver including (i) an aperture antenna being loop-shaped and (ii) a circuit, the loop coil forming electromagnetic induction connection with an electromagnetic field generated in the loop coil according to electric currents flowing in the loop coil to receive high-frequency electric power of the loop coil, the circuit operating by using the electric power transmitted from the transmitter; and a matching circuit including a capacitor that is connected in series or parallel to the loop coil and/or the aperture antenna, wherein the loop coil of the transmitter includes an aperture-opposite opening area that is an opening area opposite to an opening area of the aperture antenna, the aperture-opposite opening area being formed to be larger than a different opening area of the loop coil other than the aperture-opposite opening area. - View Dependent Claims (4, 7, 9, 11)
-
Specification