JP3032697U - In-vehicle diversity antenna device - Google Patents

Abstract

(57) Abstract: It is possible to reduce the total usage of a coaxial cable connecting an enclosure housing antenna elements and the like and a diversity body and the number of circuits used by a booster incorporated in the enclosure. SOLUTION: One of the signals received by each of the antenna elements 1a, 1b is selectively placed in an enclosure 1 containing a plurality of antenna elements 1a, 1b according to the reception status of a television receiver 7. An element switching device 11 for outputting is provided.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a vehicle-mounted diversity antenna device that is installed in, for example, an automobile, has a plurality of antenna elements, and switches the antenna elements according to a radio wave reception state.

[0002]

[Prior art]

 In a vehicle-mounted diversity antenna device having an antenna element and a controller unit, an antenna element and a housing for housing this antenna element are arranged outside the vehicle, while at least the antenna element switching circuit and the receiving condition are set. The diversity main body including the controller for controlling the switching circuit is arranged in the passenger compartment of the automobile, and one coaxial cable is connected between these antenna elements for each antenna element.

Generally, in a vehicle-mounted diversity antenna device, as shown in FIG. 6, usually two antenna elements 1a and 1b are arranged in one casing 1, so that one casing is used. Two coaxial cables 2a and 2b are used per one.

Further, as shown in FIG. 7, boosters (high frequency amplifiers) 3 a and 3 b are conventionally provided in a casing 1 in order to improve the receiving sensitivity in a weak electric field and to compensate the signal attenuation in the coaxial cable. Although the antenna elements 1a and 1b in which are arranged are used, one booster 3a and 3b is used for each antenna element 1a and 1b, so that two boosters 3a and 3a 3b is required.

Further, in the vehicle-mounted diversity antenna device having two sets of the above-mentioned casings 1, as shown in FIG. 8, two coaxial cables 2 a and 2 b derived from each casing 1 are provided. Is connected to the four fixed contacts 5 a, 5 b, 5 c, 5 d of the element switching device 5 in the diversity main body 4, and via the movable contact piece 5 e and the coaxial cable 8 which are selectively switched and connected to these, The television receiver 7 functions to selectively input the received signals from the elements 1a and 1b. Also, the television receiver 7 supplies a signal according to the reception state, that is, the received signal level to the controller 9 via the coaxial cable 10, and the controller 9 controls the switching of the element switching device 5 according to the signal. Is to be done.

Further, in the diversity body 4, one booster 6 is provided between the movable contact piece 5e of the element switching device 5 and the coaxial cable 8 instead of the boosters 3a and 3b shown in FIG. By making the connections as shown, the received signals from the four antenna elements 1a and 1b can be selectively amplified and input to the television receiver 7.

[0007]

[Problems to be solved by the device]

 However, in such a conventional vehicle-mounted diversity antenna device, since the body 1 is arranged outside the vehicle and the diversity body 4 is arranged inside the passenger room, the coaxial cables 2a and 2b connecting between them are generally used. Since a length of about 5 m is adopted and two antenna elements 1a and 1b are arranged in one case 1, as a result, one case requires a coaxial cable of 10 m, There was a problem that the amount of wiring increased, the wiring work became more frequent, and the cost increased.

Further, among the conventional vehicle-mounted diversity antenna devices shown in FIGS. 7 and 8, one coaxial cable is used for each of the antenna elements 1a and 1b. There is a problem in that one booster is required for each of the elements 1a and 1b, and as a result, a significant increase in product cost cannot be avoided.

The present invention is intended to solve the above-mentioned problems, and provides a coaxial cable for connecting a body installed outside an automobile and a diversity body installed in a passenger compartment of the automobile. Provides a vehicle-mounted diversity antenna device that can reduce the amount of use and the number of circuits used by the booster built into the body, which can simplify the circuit configuration and wiring work and reduce costs. The purpose is to do.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a vehicle-mounted diversity antenna device according to the invention of claim 1 is provided with a plurality of antenna elements, and the antenna elements are housed in a housing according to the reception status of a television receiver. An element switch is provided to selectively switch and take out any of the signals received by the respective antenna elements.

Further, in the vehicle-mounted diversity antenna device according to the invention of claim 2, a booster for amplifying the selectively taken out signal is connected to the element switching device.

Further, in the vehicle-mounted diversity antenna device according to the invention of claim 3, a booster for amplifying the selectively taken out signal is connected to the element switching device, and the television is connected to the booster. It is connected with a switch that shunts the input and output of the booster according to the reception status of the John receiver.

According to a fourth aspect of the present invention, there is provided a vehicle-mounted diversity antenna device in which the television receiver is selected from a plurality of reception signals selected one by one for each of the plurality of bodies having a plurality of antenna elements. Depending on the reception status of the unit, a unit switch that selects and outputs only the received signal from one box, an element switch inside the box, a controller that controls the booster and the switch that shunts it are provided. is there.

Further, in the vehicle-mounted diversity antenna device according to the invention of claim 5, the booster is connected to one output circuit of the signal selectively extracted by the unit switching device.

In the vehicle-mounted diversity antenna device according to a sixth aspect of the present invention, a booster for amplifying the selectively taken out signal is connected to the unit switching device, and the booster of the television receiver is connected to the booster. It is connected with a switch that shunts the input and output of the booster according to the reception status.

[0016]

[Embodiment of device]

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a connection diagram of essential parts of a vehicle-mounted diversity antenna device according to the present invention. Reference numeral 1 is a body forming an antenna unit, 1a and 1b are two antenna elements provided in the body, and 11 is a body. It is an element switching device that switches the output signals of the antenna elements 1a and 1b.

The element switching device 11 includes fixed contacts 11a and 11b connected to the antenna elements 1a and 1b, and a movable contact piece 11c selectively connected to the fixed contacts 11a and 11b. Reference numeral 12 is a coaxial cable which is connected between the movable contact piece 11c and the diversity body 4 and supplies a received signal. Reference numeral 13 is a control signal which is output according to the reception status of the television receiver 7 and controls the switching of the element switching device 11.

Therefore, in this embodiment, the movable contact piece 11c is fixed according to the control signal 13 output from the controller 9 in the diversity body 4 according to the image receiving condition of the television receiver 7. The reception signal of the antenna element 1a or 1b connected to these fixed contacts 11a and 11b by being switched and connected to either of the contacts 11a and 11b is input to the diversity 4.

By doing so, it is possible to select and use one of the antenna elements 1a and 1b that receives the strongest radio wave. Further, since only one coaxial cable 12 is used for each of the antenna elements 1a and 1b, it is possible to reduce the cable usage and the cost.

Therefore, by connecting one booster 14 to the one coaxial cable 12 as shown in FIG. 2, the booster 14 can be selectively connected to each of the antenna elements 1a and 1b. As a result, as shown in FIG. 7 and FIG. 8 of the related art, it is possible to avoid complication of the circuit configuration and uneconomicalness caused by providing the boosters 3a and 3b for each of the antenna elements 1a and 1b.

FIG. 3 is a connection diagram of essential parts showing a vehicle-mounted diversity antenna device according to another embodiment of the present invention. This is one in which the input and output ends of the booster 14 shown in FIG. 2 can be shunted by a switch circuit having a switch 15. This shunt is performed based on the signal output according to the reception status of the television receiver 7, and at this time, the booster 14 does not amplify the received signal, and either the antenna element 1a or 1b is not amplified. The received signal received by is directly input to the diversity main body 4 without passing through the booster 14.

FIG. 4 is a connection diagram showing another embodiment of the present invention. This is because two sets of bodies 1 are arranged side by side, and one reception signal is selected from a plurality of reception signals (two each) selected for each body 1 by the unit selector 16 provided in the diversity main body 4. Only the selected items are output.

Further, here, the reception signal selected and output by the unit switching device 16 is input to the television receiver 7 through the booster 6 provided in the diversity main body 4. This television receiver 7 is A signal (usually a video signal) corresponding to the reception state is output, and this signal is input to the controller 9 via the cable 10.

Therefore, the controller 9 selects one of the antenna elements 1a and 1b of each set that receives the strongest radio wave based on the signal corresponding to the reception state, and obtains it from each antenna unit 1. Either of the two received signals can be selectively output by switching the unit switching device 16.

Therefore, in this case, any one of the received signals from the four antenna elements 1a and 1b can be selectively raised and lowered by using one booster 6, and the boosted output is supplied to the television receiver 7. it can. As a result, the number of coaxial cables 12 used is as small as two, and the number of boosters 6 used can be reduced, resulting in a significant cost reduction.

FIG. 5 is a connection diagram showing another embodiment of the present invention. As shown in FIG. 4, the booster 6 is not provided in the diversity main body 4, but one booster 14 is provided for each antenna unit 1 and is connected in the middle of each coaxial cable 12. Is. By doing so, it is possible to avoid the inconvenience of providing one booster 3a, 3b for each of the four antenna elements 1a, 1b as shown in FIG. 4 of the related art, and simplifying the configuration of each antenna unit 1. And low cost can be realized.

Although not shown, the booster 6 shown in FIG. 4 or the booster 14 shown in FIG. It can also be input to the John receiver 7.

[0028]

[Effect of device]

 As described above, according to the invention of claim 1, a plurality of antenna elements are provided, and the antenna elements are received by the respective antenna elements according to the reception status of the television receiver in the housing. Since it was configured to provide an element switching device that selectively switches and extracts any of the signals, the total coaxial cable that connects the enclosure installed outside the vehicle and the diversity main unit installed in the passenger compartment of the vehicle As a result, it is possible to reduce the amount used, and to realize the simplification of the structure of the antenna device and the cost reduction.

Further, according to the invention of claim 2, since the booster for amplifying the selectively extracted signal is connected to the element switching device, the booster included in the enclosure is The number of circuits used can be reduced, which has the effect of facilitating the circuit configuration and wiring work, and lowering the cost.

Further, according to the invention of claim 3, a booster for amplifying the selectively taken out signal is connected to the element switching device, and the booster receives the reception status of the television receiver. Since it is configured to connect a switch that shunts the input and output of the booster according to the above, when the level of the received signal output through the element switching device is sufficiently high, directly without passing through the booster, By inputting this received signal to the television receiver, the effect that the received image with optimum sensitivity can be reproduced stably can be obtained.

According to a fourth aspect of the invention, one of a plurality of reception signals selected one by one for each of the plurality of bodies having a plurality of antenna elements is selected according to the reception status of the television receiver. Since a unit switch that selects and outputs only the received signal from one box and a controller that controls the element switch in the box, the booster, and the switch that shunts it are installed, multiple antenna elements can be installed. Only one of a large number of received signals obtained from multiple sets of existing cables can be input to the diversity main unit by using a small number of coaxial cables, which has the effect of reducing the system cost.

Further, according to the invention of claim 5, since the booster is connected to one output circuit of the signal selectively taken out by the unit switch, a plurality of antenna elements having a plurality of antenna elements are provided. A large number of received signals from a group of sets can be boosted and output by using a single booster, which has the effect of reducing the coaxial cable and realizing a significant cost reduction of the system.

Further, according to the invention of claim 6, a booster for amplifying the selectively taken out signal is connected to the unit switching device, and the booster receives the reception status of the television receiver. Since a switch that shunts the input / output of the booster is connected in accordance with the above, the received signal selected according to the reception status of the television receiver among the many received signals from multiple antenna elements By bypassing the booster and inputting it directly to the television receiver, the optimum image can be reproduced.

[Brief description of drawings]

FIG. 1 is a connection diagram of essential parts showing a vehicle-mounted diversity antenna device according to an embodiment of the present invention.

FIG. 2 is a connection diagram of essential parts showing a vehicle-mounted diversity antenna device according to another embodiment of the present invention.

FIG. 3 is a connection diagram of essential parts showing a vehicle-mounted diversity antenna device according to another embodiment of the present invention.

FIG. 4 is a connection diagram of essential parts showing a vehicle-mounted diversity antenna device according to another embodiment of the present invention.

FIG. 5 is a connection diagram of essential parts showing a vehicle-mounted diversity antenna device according to another embodiment of the present invention.

FIG. 6 is a partial connection diagram showing a conventional vehicle-mounted diversity antenna device.

FIG. 7 is a partial connection diagram showing another conventional diversity antenna device.

FIG. 8 is a connection diagram showing another conventional diversity antenna device.

FIG. 9 is a connection diagram showing another conventional diversity antenna device.

[Explanation of symbols]

 1 body 1a, 1b antenna element 7 television receiver 11 element selector 12 coaxial cable 14 booster 15 switch 16 unit selector

Claims (6)

[Scope of utility model registration request] 1. A plurality of antenna elements and a plurality of antenna elements, which are provided in a housing for accommodating the antenna elements and selectively select one of the signals received by each of the antenna elements according to the reception status of a television receiver. An in-vehicle diversity antenna device having an element switching device for taking out. 2. The vehicle-mounted diversity antenna device according to claim 1, wherein a booster for amplifying the signal selectively extracted from the element switching device is connected to the inside of the casing. 3. A booster for amplifying the selectively taken out signal is connected to the element switching device, and a booster input / output is shunted to the booster according to a receiving condition of the television receiver. The in-vehicle diversity antenna device according to claim 1, further comprising a switch connected to the switch. 4. A plurality of received signals selected one by one for each of the plurality of bodies having a plurality of antenna elements, and only a received signal from one body depending on the reception status of the television receiver. 4. A unit switcher for selecting and outputting the switch, and a controller for controlling the element switcher, the booster and the switch for shunting the booster in the chamber are provided.
The in-vehicle diversity antenna device according to any one of 1. 5. The vehicle-mounted diversity antenna device according to claim 4, wherein a booster is connected to one output circuit of the signal selectively extracted by the unit switching device. 6. A booster for amplifying the signal that is selectively taken out is connected to the unit switching device, and the booster input / output is shunted to the booster according to the reception status of the television receiver. The in-vehicle diversity antenna device according to claim 4, further comprising a switch connected to the switch.