JPH0951219A - On-vehicle antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the size of a substrate small by providing an antenna pattern to both sides of the board and to make the entire size small by integrating a booster section with the substrate. SOLUTION: An antenna pattern 2 designed for receiving full frequency signals at VHF and UHF bands formed by etching is formed on both sides of a board 1. The pattern 2 is formed on a 1st side 1a and a 2nd side 1b of the board 1, and straight line parts 10, 11 provided nearly in the middle of the side 1a along the lengthwise direction are connected integrally in series with waving parts 13, 14. A booster section 3 provided at the end of substrate 1 is connected to a power supply via a coaxial cable 4. Then each lengthwise direction of the straight line parts 10, 11, waving parts 13, 14, and auxiliary straight line parts 30, 31 is opposite to each other in almost a full azimuth and the antenna receives a radio wave incoming from almost the full azimuth at a high gain. Or the booster section and the power supply section are designed to be separate units to prevent theft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted television antenna, and more particularly to a novel improvement for obtaining a small and highly sensitive antenna by providing antenna patterns on both sides of a substrate.

[0002]

2. Description of the Related Art An antenna for a vehicle-mounted television of this type which has been conventionally used generally has an antenna pattern 2 formed on a pair of substrates 1 and 1Y as shown in FIG.
It is composed of an F pattern 2a and a UHF pattern 2b,
The patterns 2a and 2b are used for the impedance matching unit 1
5 is laid down through the cable 4 and
The impedance matching section is connected to the booster section (not shown) via the cable jack 15a. Therefore, in the case of the above-mentioned configuration, the substrates 1 and 1Y are used by being attached to the surface of the glass or the like of the vehicle through the attaching portion (not shown) formed on the back surface of each of the substrates 1 and 1Y. The antenna developed by the applicant is disclosed as utility model registration No. 3004733.

[0003]

Since the conventional vehicle-mounted television antenna is constructed as described above, the following problems exist. That is, since each pattern formed on the substrate is formed in a linear shape or a diagonal shape in accordance with the λ / n wavelength or the λn wavelength, the length of the pattern for receiving the VHF band (particularly 1 ch) is particularly long. Therefore, the length of the substrate becomes long, the mounting is very inconvenient, and the miniaturization is extremely difficult. Further, since the antenna pattern is formed only on one surface of the substrate, it is difficult to obtain sufficient sensitivity.

The present invention has been made in order to solve the above problems, and in particular, an in-vehicle television antenna in which a small and highly sensitive antenna is obtained by providing antenna patterns on both sides of a substrate. The purpose is to provide.

[0005]

An on-vehicle television antenna according to the present invention comprises an antenna pattern formed on an insulative substrate and a booster portion connected to the antenna pattern. A linear portion formed on the first surface of the substrate, and a wavy portion that continuously has a plurality of non-parallel linear portions formed in a direction non-parallel to the longitudinal direction of the linear portion; A plurality of first auxiliary linear portions formed on the second surface opposite to the first surface and linearly formed in a direction non-parallel to the non-parallel linear portions of the linear portion and the wavy portion; and the second surface And a plurality of second auxiliary linear portions linearly formed in a direction parallel to the non-parallel linear portion.

More specifically, the substrate is made of a glass epoxy material.

More specifically, the substrate is provided with a booster portion, and the booster portion and a power source for supplying power to the booster portion are connected to each other by a cable and separated from each other.

More specifically, the linear portion and the wavy portion and the auxiliary linear portions are arranged so as to face each other with the substrate interposed therebetween.

More specifically, the substrate is contained in a flat casing, and a magnetic or adhesive type mounting surface is formed on the bottom surface of the casing.
In the antenna for a vehicle-mounted television according to the present invention, a linear portion and a plurality of non-parallel linear portions are continuously formed on the first surface of a small, substantially rectangular substrate in a direction non-parallel to the linear portion. Since it has the wavy portion and the first and second auxiliary straight portions on the second surface, it can be used for TV radio waves (VH
(F, UHF) can be received and the receiving sensitivity can be improved by the antenna patterns formed on both sides. The received television signal is amplified on the booster portion provided on the substrate and output from the antenna jack.
Further, since the booster section and the power supply section are connected by a cable, the antenna function cannot be obtained only by the substrate as the antenna.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an antenna for a vehicle-mounted television according to the present invention will be described in detail below with reference to the drawings. The same parts as those of the conventional example will be described using the same reference numerals. In FIG. 1, reference numeral 1 denotes a printed circuit board made of an insulating material (glass epoxy material). Both sides of the board 1 are etched to be designed for VHF and UHF band reception. The patterned antenna pattern 2 is formed.

The antenna pattern 2 is formed on the substrate 1.
Formed on the first surface 1a and the second surface 1b of the first surface 1a
1 provided along the lengthwise direction at approximately the center
A pair of straight line portions 10 and 11 and a plurality of non-parallel straight line portions 12 formed in a direction orthogonal to the longitudinal direction of the straight line portions 10 and 11, that is, in a non-parallel direction, are continuously formed to form a substantially wavy shape 1. A pair of corrugated portions 13 and 14 is formed. These straight line portions 10 and 11 are integrally connected in series to the wavy portions 13 and 14, respectively. Further, on the second surface 1b opposite to the first surface 1a, a plurality of first linear portions 10 and 11 and a plurality of first linear portions in a direction non-parallel to the non-parallel linear portion 12 are formed.
An auxiliary straight line portion 30 and a plurality of second auxiliary straight line portions 31 formed in parallel with the non-parallel straight line portion 12 are formed.
The linear portions 10, 11 and the corrugated portions 13, 14 and the respective auxiliary linear portions 31 correspond to each other via the substrate 1 to form a capacitor. Therefore, the antenna patterns of the first surface 1a and the second surface 1b are formed so as to have completely different shapes and interact with each other to improve the gain.

A booster portion 3 is integrally provided at the end portion of the substrate 1, and as shown in FIG. 3, the booster portion 3 and the end portion of the straight portion 11 are impedance matching impedances. The linear portions 10 and 11 are connected by a matching portion 15, and the linear portions 10 and 11 are connected to a coil 16 for frequency tuning adjustment.
Are connected to each other.

The booster section 3 includes a coaxial cable 4
Is connected to the power supply unit 20 via
An antenna jack 21 for outputting a reception signal and a power outlet 22 for insertion into a cigarette lighter receiver (not shown) of a vehicle are independently connected.
The power source 20 and the booster unit 3 have a power cable (not shown) together with a coaxial cable in order to guide the power source and the received signal.

FIG. 4 shows the power supply unit 20, which is mainly a circuit for synthesizing a high frequency current and a direct current (that is,
The booster unit 3 directly connected to the antenna has a circuit for separating a high frequency current and a direct current) 20a. Therefore, VHF and UH received by the antenna pattern 2 are received.
The received signal in the F band is gain-amplified by the booster unit 3, and then sent to the antenna jack 21 via the cable 4 and the power supply body 20. Further, since the board 1 and the power supply body 20 are separated, even if only the board 1 provided outside the vehicle is stolen, the board 1 has no function and theft is prevented. In addition, this booster part 3
Can also be provided as a separate component outside the substrate 1. Further, the power supply body 20 includes a switch 40 and a lighting lamp 4.
1, a blinking lamp 42 and a blinking circuit 43 are provided, and when the power supply unit 20 is turned on, the lighting lamp 41 is turned on, and
The blinking lamp 42 is blinking by the blinking circuit 43.

Therefore, since the longitudinal directions of the above-mentioned straight line portions 10 and 11, the wavy portions 13 and 14, and the first and second auxiliary straight line portions 30 and 31 are oriented in almost all directions, almost all of them are oriented. You can receive radio waves coming from the direction. Further, each of the auxiliary linear portions 30 and 31 constitutes a function like a waveguide as an electric action, and a large increase in gain was obtained by using each of the auxiliary linear portions 30 and 31. Further, the substrate 1 can be built in the flat casing 50 shown in FIG. 4, and the casing 50 can be mounted on the upper surface of the vehicle by the magnetic or adhesive type mounting surface 51 provided on the bottom surface thereof.

[0016]

The antenna for a vehicle-mounted television according to the present invention is
With the above-described configuration, the substrate having the antenna pattern can be downsized, and the booster unit can be integrated with the substrate to downsize the entire device. Also, since the antenna pattern is formed on both sides of the substrate,
The reception gain is improved, and a highly sensitive and small antenna can be obtained. Further, since the booster section and the power supply unit are separate bodies, they prevent theft.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an on-vehicle television antenna according to the present invention.

FIG. 2 is a configuration diagram showing an antenna pattern on a first surface of the substrate of FIG.

3 is a configuration diagram showing an antenna pattern on a second surface of the substrate of FIG. 1. FIG.

FIG. 4 is a configuration diagram showing an appearance of the present invention.

FIG. 5 is a configuration diagram of a conventional configuration.

[Explanation of symbols]

 1 board 1a 1st surface 1b 2nd surface 2 antenna pattern 10,11 straight part 12 non-parallel straight part 13,14 corrugated part 30 first auxiliary straight part 31 second auxiliary straight part 50 casing 51 mounting surface

Claims (5)

[Claims] 1. An antenna pattern comprising: an antenna pattern (2) formed on an insulating substrate (1); and a booster section (3) connected to the antenna pattern (2).
(2) is a linear portion (1) formed on the first surface (1a) of the substrate (1).
0, 11), and the wavy portion (13, 14) continuously having a plurality of non-parallel straight portions (12) formed in a direction non-parallel to the longitudinal direction of the straight portions (10, 11), It is formed on the second surface (1b) opposite to the first surface of the substrate (1) and is not parallel to the non-parallel linear part (12) of the linear parts (10, 11) and the corrugated parts (13, 14). A plurality of first auxiliary linear portions (30) linearly formed in a parallel direction;
An in-vehicle television antenna, comprising: a plurality of second auxiliary linear portions (31) formed on the surface (1b) in a straight line in a direction parallel to the non-parallel linear portion (12). 2. The in-vehicle television antenna according to claim 1, wherein the substrate (1) is made of a glass epoxy material. 3. The substrate (1) is provided with a booster section (3), and the booster section (3) and a power source (20) for supplying power to the booster section (3) are connected by a cable (4). The vehicle-mounted television antenna according to claim 1 or 2, wherein the antenna is connected to each other and configured separately. 4. The straight portion (10, 11) and the wavy portion (13, 14)
And the auxiliary linear portions (30, 31) are arranged to face each other with the substrate (1) interposed therebetween.
4. The vehicle-mounted television antenna according to any one of 1 to 3. 5. The substrate (1) has a flat casing (50).
5. The vehicle-mounted television according to claim 1, wherein the casing (50) is built in the inside thereof, and a magnetic or adhesive type mounting surface (51) is formed on the bottom surface of the casing (50). antenna.