JP3021092U - Output level automatic switching circuit - Google Patents

Abstract

(57) [Abstract] [Purpose] A circuit that has a connector for an antenna of a wireless communication device and a connector for connecting an optional linear amplifier, and that does not require adjustment of the output level when switching to a circuit that switches the output. [Structure] When the output of the transmission power amplifier 2 is switched by the changeover switch 1 for switching between the antenna connector A and the connector B connected to the linear amplifier 4, the connector A side automatically outputs the rated transmission power and the connector B side. Then, it is a circuit that outputs the transmission power corresponding to the input level of the linear amplifier 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wireless communication device that includes an antenna connection connector and a linear amplifier connection connector to select and switch the output side.

[0002]

[Prior art]

 The rated transmission power of each wireless communication device is determined for each model, and it has the function to communicate with the rated power or less. In addition to that, high power communication is also performed through a linear amplifier. In this case, there is a structure in which a linear amplifier is connected to the connector for connecting the antenna, and a wireless communication device that has a connector for connecting the linear amplifier in addition to the connector for connecting the antenna and selectively switches.

In the case of a wireless communication device having a connector for connecting a linear amplifier in addition to the connector for an antenna, the wireless communication device has a circuit for selecting the connection on the antenna side and the connection on the linear amplifier side shown in FIG. Referring to FIG. Reference numeral 1 is a switching switch for selecting an antenna output, 2 is an amplifier for transmission power, 3 is a switching circuit, A and B are connectors respectively, 4 is a linear amplifier, 5 antennas A1 and 6 are antennas A2.

To switch between the conventional antenna connection and the linear amplifier connection, the connector A is connected to the 50 Ω antenna A1 and the connector B is connected to the linear amplifier. Select either B. When A is selected, the output of the transmission power amplifier 2 switches the switching circuit 3 to the connector A side and transmits from the antenna A1. Next, when the changeover switch 1 is changed over to B, the changeover circuit 3 is changed over to the connector B side and the transmission output is transmitted from the antenna A2 through the linear amplifier 4. If the rated transmission output of this wireless communication device was 100W, even if the linear amplifier for 500W output was for 500W, the input of the linear amplifier had to be set to 50W or less. For this reason, it is necessary to change the output setting when operating the linear amplifier, but if this setting change is neglected, 100 W of transmission power will flow into the linear amplifier and stress due to careless power will be applied to the linear amplifier. There was a risk of failure.

[0005]

[Problems to be solved by the device]

 If the wireless communication device is equipped with an antenna connector and a connector for connecting to a linear amplifier to selectively switch and output to each connector, when the linear amplifier is selected, the transmission output of the wireless communication device is the appropriate linear output. The purpose is to provide a circuit that controls and outputs the input level of the amplifier.

[0006]

[Means for Solving the Problems]

 In a wireless communication device equipped with a connector for connecting an antenna and a connector for connecting a linear amplifier, the transmission output side selecting means for selecting the antenna connection and the linear amplifier connection, and the rated power is output when the antenna side is selected. The output level automatic switching circuit is provided with means for controlling the level corresponding to the input of the linear amplifier when the linear amplifier side is selected.

[0007]

[Action]

 When the switch that selects the output connector selects the linear amplifier side, the output of the power transmission amplifier of the wireless communication device is connected to the linear amplifier side connector and the antenna side is disconnected. Simultaneously with the switching, the output level of the power transmission amplifier is set to an appropriate input of the connected linear amplifier, and a large amount of power is transmitted from the linear amplifier.

[0008]

【Example】

 FIG. 1 is a block diagram showing an embodiment of the present invention. The figure will be described. 1 is a switch for selectively setting the connector on the antenna side or linear amplifier side, 2 is a transmission power amplifier capable of selectively setting the output level of the wireless communication device, 3 is a switching circuit, A and B are connectors, and 4 is linear The amplifier 5 has an antenna A1 and the amplifier 6 has an antenna A2.

The operation of the present invention will be described. When the changeover switch 1 is set to A, the transmission power amplifier 2 outputs rated transmission power (assuming 100 W) from the antenna A1 through the connector A of the changeover circuit 3. Next, when the changeover switch 1 is changed over to B, the changeover circuit 3 is changed over to the connector B side according to this selection, and a control signal is sent to the transmission power amplifier 2 so that the input level of the linear amplifier 4 is controlled appropriately. To do. If the transmission output of the linear amplifier 4 is 500 W, the input level may be 50 W or less, so if the transmission power of the wireless communication device is 100 W, the input power is reduced to 50 W or less before output. This transmission control can be performed as shown in FIG. 2 as an example.

FIG. 2 is a block diagram of the inside of a wireless communication device showing an embodiment of the present invention. Explain FIG. Reference numeral 1 is a changeover switch, 2a is an ALC amplifier, 2b is a PWR amplifier, 3 is a switching circuit, A and B are connectors, 7 is a CPU, and 8 is an ALC circuit.

The operation will be described with reference to FIG. When the changeover switch 1 is set to A, the CPU 7 switches the changeover circuit 3 to the connector A side and outputs a control signal for rated power to the ALC circuit 8 to output an ALC signal based on the control signal from the ALC circuit 8. The rated transmission power (for example, 100 W) is output from the connector A by the ALC amplifier 2a and the PWR amplifier 2b by supplying it to the ALC amplifier 2a to control the level.

Next, when the changeover switch 1 is set to B, the CPU 7 switches the changeover circuit 3 to B, and sends a control signal corresponding to the input level (for example, 50 W) of the linear amplifier 4 to the ALC circuit 8, An ALC signal based on the control signal is output from the ALC circuit 8 to the ALC amplifier 2a. The input level (50 W) of the linear amplifier 4 is sent from the PWR amplifier 2b to a predetermined level by the ALC amplifier 2a and output to the linear amplifier 4 through the connector B.

Although two sets of A / B connectors are provided on the antenna output side, three or more sets can also be used in the same manner. Further, the selection by the changeover switch may be performed by manual key input, or a configuration in which a plurality of data are stored in a memory and automatically changed over may be selected. Also, although it has been described as a connector for connecting a linear amplifier, it is not limited to a linear amplifier.

[0014]

[Effect of device]

 According to the present invention, the wireless communication device is provided with a connector for directly outputting to the antenna and a connector for connecting the linear amplifier, and selectively communicates by selectively using the rated transmission power and the large transmission power through the linear amplifier. The transmission power level corresponding to the input bell of the linear amplifier is automatically set when the line is selected and switched to the linear amplifier side, so it is not necessary to adjust the transmission power every time the linear amplifier is selected, unlike the conventional case. Stable operation can be performed without applying overpower.

[0015]

[Brief description of drawings]

FIG. 1 is a block diagram for selecting an antenna connector and a linear amplifier connector according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of an output unit of a wireless communication device according to an embodiment of the present invention.

FIG. 3 is a block diagram of a circuit that is switched and connected to a conventional linear amplifier.

[Explanation of symbols]

 1 Changeover switch 2 Amplifier 2a ALC amplifier 2b PWR amplifier 3 Changeover circuit 4 Linear amplifier 5 Antenna A1 6 Antenna A2 7 CPU 8 ALC circuit

Claims (1)

[Scope of utility model registration request] 1. A wireless communication device comprising an antenna connection connector and a connector for connecting a linear amplifier, wherein a transmission output side selecting means for selecting the antenna connection and the linear amplifier side connection and an antenna side are selected. An automatic output level switching circuit comprising means for outputting rated power and controlling and outputting to a level corresponding to the input level of the linear amplifier when the linear amplifier side is selected.