Communication system, transmitting device, transmitting method, receiving device, and receiving method

• US 20070037516A1
• Filed: 08/08/2006
• Published: 02/15/2007
• Est. Priority Date: 08/10/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ito, Yujiro, Sawai, Jun, Ishikawa, Nobuyuki
• Granted Patent: US 7,696,835 B2
• Time in Patent Office: Days
• US Class Current: 455/41.100
• CPC Class Codes: G06K 19/07786 the antenna being of the HF type, such as a dipole
• CPC Class Codes: H04L 25/0268 with modulation and subsequent demodulation
• CPC Class Codes: H04L 25/0272 Arrangements for coupling to multiple lines, e.g. for differential transmission
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence

Abstract

A communication system includes a transmitting device configured to transmit data and a receiving device configured to receive the data. The transmitting device includes first and second transmission lines and a differential signal outputter configured to generate differential signals from the microwave signal corresponding to the data, and to output one of the differential signals to the first transmission line and the other differential signal to the second transmission line. The receiving device includes third and fourth transmission lines and a converter. The differential signals are transmitted to the third and fourth transmission lines from the first and second transmission lines via line-to-line couplings. The converter then converts the differential signals into the microwave signal corresponding to the data, and outputs the converted microwave signal.

Claims

1. A communication system comprising:

a transmitting device, configured to transmit data, including

first and second transmission lines, disposed in parallel at a predetermined gap, configured to propagate a microwave signal, and

a differential signal outputter configured to generate differential signals from the microwave signal corresponding to the data, and to output one of the differential signals to the first transmission line and the other differential signal to the second transmission line; and

a receiving device, configured to receive the data, including

third and fourth transmission lines, disposed in parallel at the predetermined gap, configured to propagate the microwave signal, and

a converter configured to convert the differential signals generated at the third and fourth transmission lines by line-to-line couplings into the microwave signal corresponding to the data, and to output the converted microwave signal, wherein the differential signals are generated at the third and fourth transmission lines by the line-to-line couplings when the third and fourth transmission lines are brought closer to the first and second transmission lines that are propagating the differential signals so that the third and fourth transmission lines face the first and second transmission lines, respectively.

2. A transmitting device configured to transmit data to a receiving device including first and second transmission lines, the transmitting device comprising:

third and fourth transmission lines, disposed in parallel at a predetermined gap, configured to propagate a microwave signal; and

a differential signal outputter configured to generate differential signals from the microwave signal corresponding to the data, and to output one of the differential signals to the third transmission line and the other differential signal to the fourth transmission line, wherein

the data is transmitted to the receiving device via line-to-line couplings generated between the third transmission line and the first transmission line of the receiving device and between the fourth transmission line and the second transmission line of the receiving device when the first and second transmission lines are brought closer to the third and fourth transmission lines that are propagating the differential signals so that the first and second transmission lines face the third and fourth transmission lines, respectively.

3. The transmitting device according to claim 2, wherein the third and fourth transmission lines are microstrip lines.

4. The transmitting device according to claim 2, wherein the differential signal outputter is a coil.

5. A transmitting method for a transmitting device including first and second transmission lines, disposed in parallel at a predetermined gap, configured to propagate a microwave signal, and a differential signal outputter configured to generate differential signals from the microwave signal corresponding to data to be transmitted to a receiving device that includes third and fourth transmission lines, and to output one of the differential signals to the first transmission line and the other differential signal to the second transmission line, the method comprising the steps of:

causing the differential signal outputter to generate the differential signals from the microwave signal corresponding to the data, and to output one of the differential signals to the first transmission line and the other differential signal to the second transmission line; and

causing the first transmission line to propagate one of the differential signals generated from the microwave signal corresponding to the data and the second transmission line to propagate the other differential signal, wherein

the data is transmitted to the receiving device via line-to-line couplings generated between the first transmission line and the third transmission line of the receiving device and between the second transmission line and the fourth transmission line of the receiving device when the third and fourth transmission lines are brought closer to the first and second transmission lines that are propagating the differential signals so that the third and fourth transmission lines face the first and second transmission lines, respectively.

6. A receiving device configured to receive data from a transmitting device having first and second transmission lines, the receiving device comprising:

third and fourth transmission lines, disposed in parallel at a predetermined gap, configured to propagate a microwave signal; and

a converter configured to convert differential signals generated at the third and fourth transmission lines by line-to-line couplings into the microwave signal corresponding to the data, and to output the converted microwave signal, wherein

the differential signals are generated at the third and fourth transmission lines by the line-to-line couplings when the third and fourth transmission lines are brought closer to the first and second transmission lines that are propagating the differential signals generated from the microwave signal corresponding to the data so that the third and fourth transmission lines face the first and second transmission lines, respectively.

7. The receiving device according to claim 6, wherein the third and fourth transmission lines are microstrip lines.

8. The receiving apparatus according to claim 6, further comprising:

a level detector configured to detect the level of the signal output from the converter, wherein

the converter adjusts the level of the signal corresponding to the data in accordance with the level detected by the level detector, and outputs the signal.

9. A receiving method for a receiving device, configured to receive data from a transmitting device having first and second transmission lines, including third and fourth transmission lines, disposed in parallel at a predetermined gap, configured to propagate a microwave signal, and a converter configured to convert differential signals generated at the third and fourth transmission lines by line-to-line couplings into the microwave signal corresponding to the data, and to output the converted microwave signal, wherein the differential signals are generated at the third and fourth transmission lines when the third and fourth transmission lines are brought closer to the first and second transmission lines that are propagating the differential signals generated from the microwave signal corresponding to the data so that the third and fourth transmission lines face the first and second transmission lines, respectively, the method comprising the steps of:

causing the third transmission line to propagate one of the differential signals and the fourth transmission line to propagate the other differential signal; and

causing the converter to convert the differential signals into the microwave signal corresponding to the data, and to output the converted microwave signal.