JP3031936U - Small in-vehicle antenna for TV - Google Patents

Abstract

(57) [Abstract] (Correction) [PROBLEMS] To provide an antenna system which is small and which can receive television signals from multiple directions. SOLUTION: An arc-shaped VHF antenna element 1 and UHF
The antenna element 2 further comprises a matching section 5 for connecting the antenna element 2 and the booster section 6 depending on the reception state of television radio waves.
You can choose to use.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is to reduce the size of the in-vehicle antenna for TV and to receive TV radio waves from multiple directions.

[0002]

[Prior art]

 There are two types of conventional onboard antennas for TVs, one mounted outside the vehicle as shown in Fig. 3 and the other mounted inside the vehicle as shown in Fig. 4. Both have different antenna elements, but the length of the antenna element when used is 40 cm to 120 cm. . In addition, rod-shaped and film-shaped products were subject to mounting position restrictions due to factors such as securing visibility in driving, vehicle width restrictions, and the allowable height of the car park.

[0003]

[Problems to be solved by the device]

 Conventional in-vehicle antennas for TVs have the following drawbacks. (B) Due to the vehicle width limitation and style, the rod-shaped antenna was attached to the rear half of the vehicle body as shown in Fig. 3, so its reception performance was insufficient for TV waves from the front. (B) The film-shaped antenna is attached to the end of the rear window or front window as shown in Fig. 4 to secure the field of view, so it is too close to the metal part of the vehicle body and the reception sensitivity is low. (C) The one attached to the center of the rear window obstructed the rear view as shown in Fig. 4, and the reception performance was insufficient due to the influence of the car roof on TV radio waves from the front. was. The present invention addresses these shortcomings.

[0004]

[Means for solving the problem]

 The present invention solves the conventional drawbacks by the following methods. (B) The antenna element is shaped like an arc as shown in Fig. 1 so that it can receive TV radio waves from multiple directions. (B) To further reduce the size of the antenna, use multiple continuous arcs as shown in Fig. 5 or spirals as shown in Fig. 10. (C) VHF / UHF antenna elements are arranged in three dimensions as shown in Fig. 6 and Figs. 10 to 14. (D) Depending on where the antenna is installed and the receiving area, it may be necessary to increase the antenna output, so a booster section (6) will be provided. This booster has an antenna wire (4) and its plug (7) and a power cord and its plug (8). (E) Put the antenna element in a small container (9) as shown in Fig. 7, and attach it to the vicinity of the lower part of the window or the ceiling in the vehicle as shown in Fig. 8. Also, as shown in Fig. 9, if the antenna is attached to the outside of the vehicle body, such as a wagon car, and the style is not damaged, the receiving sensitivity will be better.

[0005]

[Action]

 The present invention improves the directionality of receiving TV radio waves and reduces the size at the same time by forming the antenna element into a circular arc, multiple arcs, or spiral shape. Furthermore, by putting this in a small container, it can be mounted in both inside and outside the vehicle. You can also use the booster to watch TV in the car even in areas with weak signals.

[0006]

【Example】

 The embodiments of the present invention will be described below. Some antennas are exposed and some are contained in a small container. The figure shows the case where they are exposed. The symbols in the figure are the same as those in Fig.1. (A) An antenna in which spiral VHF / UHF antenna elements are arranged on the same surface as shown in FIG. (B) An antenna in which spiral VHF antenna elements and upright rod-shaped UHF antenna elements are arranged as shown in FIG. (C) An antenna in which spiral VHF antenna elements and U-shaped horizontal UHF antenna elements are arranged in two stages, as shown in FIG. (D) An antenna in which spiral VHF and UHF antenna elements are arranged in upper and lower two stages as shown in FIG. (E) An antenna in which a pair of VHF antenna elements having a multi-arc shape and a pair of semi-circular UHF antenna elements as shown in FIG. The UHF antenna is also available in a combination of circular arc shown in Fig. 16 and linear form shown in Fig. 17. (F) An antenna in which a multiple circular arc or spiral antenna element is formed on a printed circuit board (10) by etching as shown in FIG. In this case, there are two methods to form each antenna element for VHF and UHF on the same surface, and to form on both front and back sides separately. (G) As shown in Fig. 18, there is a three-dimensional spiral shape as a modification of the VHF antenna element. Furthermore, as shown in Fig. 19, a three-dimensional multi-arc antenna element is possible as a modification.

[0007]

[Effect of device]

 The small in-vehicle antenna for a television according to the present invention has the above-described configuration, and the antenna can be downsized, and the length and area of the antenna element can be sufficiently secured for reception. You can receive TV radio waves from multiple directions by forming multiple arcs, spirals, or spirals. A small container with an antenna element can be made into a shape that does not impair the appearance of the car both inside and outside the car. Generally, when an antenna is installed inside a car, the radio wave condition at the front or rear may deteriorate due to the effect of the roof of the car depending on the direction of the car. By installing one antenna each and connecting them at the matching section (5), both antennas complement each other, and reception is better than when there is only one antenna. This has a great effect in urban areas where the direction of the car changes gradually. Furthermore, if the antenna is installed in the car, it is also advantageous against car washing and theft.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of the present invention.

FIG. 2 is a diagram showing a configuration when two antennas of the present invention are used.

FIG. 3 is a diagram showing a conventional antenna.

FIG. 4 is a diagram showing a conventional antenna.

FIG. 5 is a diagram showing a multi-arc antenna element.

FIG. 6 is a view showing the arrangement of VHF and UHF antenna elements.

FIG. 7 is a diagram showing an example of a small container.

FIG. 8 is a diagram showing an example of a mounting position of the present antenna.

FIG. 9 is a diagram showing an example of a mounting position of the present antenna.

FIG. 10 is a diagram showing another example of FIG. 6.

FIG. 11 is a diagram showing another example of FIG. 6.

FIG. 12 is a diagram showing another example of FIG. 6.

FIG. 13 is a diagram showing another example of FIG. 6.

FIG. 14 is a diagram showing another example of FIG. 6.

FIG. 15 is a diagram showing another example of FIG. 6.

FIG. 16 is a view showing another example of the UHF antenna element of the present invention.

FIG. 17 is a view showing another example of the UHF antenna element of the present invention.

FIG. 18 is a view showing another example of the VHF antenna element of the present invention.

FIG. 19 is a view showing another example of the VHF antenna element of the present invention.

[Explanation of symbols]

 1 VHF antenna element 2 UHF antenna element 3 Mounting base 4 Antenna wire 5 Matching part 6 Booster part 7 Antenna plug 8 Power plug 9 Small container 10 Printed circuit board

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[Procedure amendment]

[Submission date] May 14, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

Claims (3)

[Scope of utility model registration request] 1. A small vehicle-mounted antenna for a television, wherein antenna elements (1) and (2) having an arc shape are combined at a matching portion and attached to a mount (3) or a small container (9). 2. In order to further improve the directivity of the antenna with respect to television radio waves from multidirectional lines, as shown in FIG. 2, two antenna elements (1) and (2) each are connected by a matching section. Small in-vehicle antenna for TV. 3. The small vehicle-mounted antenna with a booster for television according to claim 1, wherein a booster section (5) for increasing output is connected to said antenna or built in a small container (9).