JP2000357989A - Radio wave transmitter and system thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the influence of radio wave hindrance by transmitting the radio waves picked up in the air by a 1st antenna to a 1st metal wire, to emit them into the air from the 2nd antenna as the radio waves and then transmitting the radio wave picked up in the air by the 2nd antenna to the 1st metal wire to emit them into the air from the 1st antenna as the radio waves. SOLUTION: A master unit 1 is placed on the 1st floor, and a slave unit 5 is used on the 6th floor. An antenna 2 is placed near the unit 1, and an antenna 4 is placed near the unit 5 respectively. The antennas 2 and 4 are connected together via a metal wire 3. The radio waves radiated into the air from the unit 1 are picked up by the antenna 2 and transmitted to the antenna 4 via the wire 3, and the radio waves which are radiated again into the air from the antenna 4 are picked up by the unit 5. Similarly, the radio waves radiated into the air from the unit 5 are picked up by the antenna 4 and transmitted to the antenna 2 via the wire 3. Then the radio waves reemitted into the air from the antenna 2 are picked up by the unit 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-way information transmission system using radio waves, which is a technique for improving the influence of radio interference, and is particularly effective means for use in portable equipment.

[0002]

2. Description of the Related Art A two-way information transmission system using radio waves is used in many fields. In particular, in a telephone, a radio telephone is used as a portable device as electronic devices become smaller and lighter.

[0003]

However, the above-mentioned wireless telephone has a problem in application to an area affected by radio interference such as jamming radio waves or low radio wave energy. An object of the present invention is to solve the above problems.

[0004]

The following means are used in order to achieve the object of the present invention. Radio waves are emitted into the air from the transmission unit of the first information transmission system. The radio wave emitted into the air is sensed by the first antenna, transmitted to the second antenna via a metal wire, and emitted again from the second antenna as radio waves into the air.
The receiving section of the second information transmission system senses the radio wave emitted into the air again. Similarly, a radio wave is emitted from the transmitter of the second information transmission system into the air. The radio wave emitted into the air is sensed by the second antenna, transmitted to the first antenna via a metal wire, and then emitted again into the air as a radio wave from the first antenna. The receiving section of the first information transmission system senses the radio wave emitted into the air again. A feature of the present invention is that the radio wave transmitter according to the present invention is installed between the first information transmission system and the second information transmission system while the first information transmission system and the second information transmission system remain unchanged. It is in.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment in which the present invention is applied to a parent-child telephone. The master unit (1) is installed on the first floor, and the slave unit (5) is used on the sixth floor. An antenna (2) is installed near the parent device (1), and an antenna (4) is installed near the child device (5). The antenna (2) and the antenna (4) are connected by a metal wire (3). Radio waves emitted from the master unit (1) into the air are sensed by the antenna (2), transmitted to the antenna (4) by the metal wire (3), and radio waves emitted again from the antenna (4) into the air are transmitted to the slave unit We feel at (5). Similarly, the radio wave emitted from the slave unit (5) into the air is sensed by the antenna (4), transmitted to the antenna (2) by the metal wire (3), and then emitted again from the antenna (2) into the air. Radio waves are sensed by the master unit (1). Where 1
Radio waves emitted from the main unit (1) installed on the floor,
The child device (5) used on the sixth floor may not be perceived.
Similarly, the radio waves emitted from the slave unit (5) used on the sixth floor need not be sensed by the master unit (1) installed on the first floor. Further, the area between the first floor and the sixth floor may be subject to radio interference. FIG. 2 shows an application example of the above embodiment. As shown in FIG. 2, the distributor (6) and the metal wire (3a) are inserted between the metal wire (3) and the antenna (4), the metal wire (3b) is connected, and the antenna (4a) is installed. In particular, radio waves launched from the master unit (1) into the air and sensed by the antenna (2)
Metal wire (3) and distributor (6) and metal wire (3a)
Not only transmitted to the antenna (4), but also
The signal is also transmitted to the antenna (4a) at b), and the slave unit (5) can sense the radio waves emitted again from the antenna (4) and the antenna (4a) into the air. Similarly, the handset (5)
Can be sensed by the antenna (4) and the antenna (4a). That is, the slave unit (5) senses the radio wave emitted from the antenna (4) or the antenna (4a), and the radio wave emitted from the slave unit (5) into the air is transmitted to the antenna (4) or the antenna (4a). ) Can be used within the range that can be sensed.

[0006]

As described in detail above, according to the present invention,
In a two-way information transmission system using radio waves, the two-way information transmission system remains the same as before, and by installing the radio wave transmitter of the present invention, it is affected by radio interference such as jamming radio waves or low radio wave energy. In regional adaptations, improvements in the effects of radio interference can be provided.

[Brief description of the drawings]

FIG. 1 is an embodiment of the present invention.

FIG. 2 is an application example of the above embodiment.

[Explanation of symbols]

 1 Base Unit 2 Antenna 3 Metal Wire 3a Metal Wire 3b Metal Wire 4 Antenna 4a Antenna 5 Slave Unit 6 Distributor

Claims (4)

[Claims] A first antenna, a first metal wire covered with an electrical insulator connected to the first antenna, and a first metal wire;
A second antenna connected to one end of the metal wire that is not connected to the first antenna, transmitting a radio wave sensed from the air by the first antenna to the first metal wire, and transmitting the second antenna; And transmits the radio wave sensed from the air on the second antenna to the first metal wire, and emits the radio wave on the first antenna as a radio wave. Radio wave transmission device and its system. 2. A first antenna, a first metal wire covered with an electrical insulator connected to the first antenna, and
A distributor connected to one end of the metal wire that is not connected to the first antenna, and a second insulator covered with an electrical insulator connected to a terminal that is not connected to the first metal wire of the distributor. A metal wire, a second antenna connected to one end of the second metal wire not connected to the distributor, and a terminal connected to the unconnected terminals of the first metal wire and the second metal wire of the distributor. And a third antenna connected to one end of the third metal wire, to which the distributor is not connected, and sensed from the air by the first antenna. The transmitted radio wave is transmitted to the first metal wire, distributed by the distributor to the second metal wire and the third metal wire, and radiated into the air as radio waves by the second antenna and the third antenna. And the second antenna or the third antenna
Transmitting the radio wave sensed from the air in the aerial to the distributor and the first metal wire through the second metal wire or the third metal wire, and transmitting the radio wave into the air as the radio wave through the first antenna. Characteristic radio wave transmission device and its system. 3. The radio wave transmission device and system according to claim 1, wherein said first metal wire, said second metal wire and said third metal wire are coaxial cables. 4. The method according to claim 1, wherein the first metal wire, the second metal wire, and the third metal wire are coaxial cables, and a metal wire is connected to one or both ends of a shield wire of the coaxial cable. Item 3. The radio wave transmission device and system according to claim 1 and 2.