JP3112014U - Fish radio antenna device for automobile radio - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fishfish antenna device for an automobile radio.
A fishfish antenna device for an automobile radio is connected in front of a radio wave receiving circuit to receive a signal in at least one radio wave frequency band. The antenna device includes a fishfish-shaped cover, an AM antenna, A signal amplification circuit board, an FM resonance antenna circuit provided on the signal amplification circuit board, and a metal base, wherein an AM antenna and an FM resonance antenna circuit are separately designed, and the FM resonance antenna circuit is a resonance circuit with a plurality of inductors Are connected to the metal base, and the metal base enhances the signal reception capability of the FM resonant antenna circuit to achieve the best signal reception capability on the radio frequency band of the automobile radio.
[Selection] Figure 3

Description

  The present invention relates to a type of carp fish antenna apparatus for a car radio, and more particularly, a fish carp antenna apparatus used for a car AM / FM radio. The present invention relates to an antenna device that enhances reception capability of frequency signals.

  With the advancement of radio wave technology, many products have been made wireless, and the most difficult of the radio wave technologies is the antenna design. The frequency, direction, and radio wave intensity of the antenna and radio wave are related. Each design is calculated as 1 / 4λ by radio wave and is made into a metal long bar shape of a certain length, occupying considerable space, and this makes the AM / FM antenna of the car radio into a long bar-shaped telescopic type It is designed and AM and FM share one antenna, and it is extended at startup and retracted at disconnection. However, if it is used for a long time, it is likely to break down and become inextensible, which is inconvenient.

  Therefore, the traders have developed a spiral antenna, which is made by bending a long metal rod into a spiral, but the radio wave reception capability of the spiral antenna is not ideal, which provides a so-called glass antenna design, which is flexible A conductive material is attached to glass of an automobile, and such a glass antenna is an antenna design shared by AM and FM. However, the material is quite expensive. Also provided is a planar antenna with a special bending degree laid out on a printed circuit board, and a very big drawback of such a planar antenna is that a material having a metal surface cannot be accessed because the metal is wireless. This is to absorb radio waves, but since the body of an automobile is made of metal, the planar antenna cannot receive signals.

  In order to solve the inconveniences and disadvantages of the radio radio antenna for automobile radio described above, the present invention provides a kind of fish carp antenna apparatus for an automobile radio, which can be attached to the roof top of an automobile. In addition to giving a new aesthetic appearance to the rooftop, the radio radio frequency signal reception capability of the radio can be enhanced.

  The fish carp type antenna apparatus for automobile radio of the present invention is connected in front of a radio wave receiving circuit and receives a signal of at least one radio wave frequency band. The antenna apparatus includes a fish carp cover, an AM antenna, a signal. An amplifier circuit board, an FM resonant antenna circuit provided on the signal amplifier circuit board, and a metal base, of which the AM antenna and the FM resonant antenna circuit are separately designed, and the FM resonant antenna circuit includes a plurality of inductors. Formed and connected to the metal base, the metal base enhances the signal reception capability of the FM resonant antenna circuit to achieve the best signal reception capability on the radio frequency band of the automotive radio.

The invention of claim 1 is a carp-type antenna apparatus for a car radio, which is used in front of a radio wave receiving circuit of a car radio to receive a radio frequency signal of the radio. Used for the fishfish antenna device,
A fish carp-shaped cover with an internal space inside,
A metal base that is coupled to the fish-rod-like cover and screwed to the car body;
An AM antenna that is installed in the interior space of the fish bowl-shaped cover;
An AM signal amplifier circuit disposed above the metal base and connected to an AM antenna, an FM resonant antenna circuit, and a signal amplifier circuit board on which an FM signal amplifier circuit is disposed;
The FM resonant antenna circuit includes a plurality of inductors and an AM signal amplifier circuit to form an FM resonant circuit, and the FM resonant antenna circuit is enhanced in radio frequency band signal reception by the metal base. It is a fishfish antenna device for car radio.
The invention of claim 2 is a fish for a car radio according to claim 1, characterized in that the AM antenna is arranged at the upper part inside the fish carp-shaped cover. It is a saddle type antenna device.
According to a third aspect of the present invention, there is provided a fish carp antenna apparatus for a car radio according to claim 1, wherein the AM antenna is an unbalanced antenna circuit. Yes.
According to a fourth aspect of the present invention, there is provided a fish carp antenna apparatus for a car radio according to claim 1, wherein the FM resonant antenna circuit is a balanced antenna. Yes.
The invention according to claim 5 is the fish carp type antenna apparatus for car radio according to claim 1, wherein the metal base is electrically connected to the FM resonance antenna circuit to enhance the FM antenna signal reception capability. It is a fishfish antenna device for car radio.
The invention according to claim 6 is the fish carp type antenna apparatus for car radio according to claim 1, wherein the signal amplifying circuit board introduces a car power source to provide a stabilized power source to the AM signal amplifying circuit and the FM signal amplifying circuit. The present invention further provides a fishfish antenna device for an automobile radio, further comprising a power supply voltage stabilization circuit to be provided.
According to a seventh aspect of the present invention, there is provided a fish carp antenna apparatus for a car radio according to claim 1, wherein the AM antenna is a magnetic core coil antenna. Yes.

  The present invention provides a fish carp antenna device for a car radio that solves the inconvenience and disadvantages of the radio radio antenna for car radio described above, which can be attached to the roof top of a car and has a new aesthetic appearance on the roof top. As well as the radio radio frequency signal reception capability of the radio.

  FIG. 1 is an external perspective view of an embodiment of a fish-radius antenna device for an automobile radio according to the present invention. FIG. 2 is an exploded view of FIG. The fishfish antenna device 20 of the present invention is used in front of a radio wave receiving circuit of an automobile radio and used to receive a radio frequency signal of the radio. As shown in FIG. 1, the shape of the fish carp antenna device 20 is very similar to that of a fish carp and can be mounted on the car body, beautify the car body, enhance the signal reception of the car radio, and extend the traditional telescopic antenna. Alternatively, it is used in place of the glass antenna.

  As shown in FIG. 2, the fish carp antenna device 20 of the present invention includes a fish carp-shaped cover 21, an AM antenna 22 of a magnetic core coil, a signal amplifier circuit board 23, and an FM resonance located on the signal amplifier circuit board 23. The antenna circuit 24 and the metal base 25 are combined.

  Please refer to FIGS. 3 and 4 together with FIG. FIG. 3 is a circuit block diagram of the present invention, and FIG. 4 is an electric circuit diagram of an embodiment of the present invention. As shown in FIG. 3, the fishfish antenna device 20 of the present invention is connected to the antenna signal input terminal of the radio wave receiving circuit 51, the AM antenna 22 is attached to the inside of the fishfish-shaped cover 21, and the fish It is placed in the upper part of the interior space where the salmon protrudes.

  The signal amplifier circuit board 23 is disposed above the metal base 25, on which the AM antenna 22, the AM signal amplifier circuit 231, the FM resonance antenna circuit 24, the FM signal amplifier circuit 232, and the power supply voltage stabilization A circuit 233 is provided. The FM resonance antenna circuit 24 of the present invention forms an FM resonance circuit formed by combining an FM signal amplification circuit 232 with a plurality of inductors, forms a resistance matching with the radio frequency received by the radio wave reception circuit, and achieves an excellent FM. It can receive frequency signals and replaces traditional FM antennas.

  As shown in FIG. 4, the present invention has a design in which an AM antenna and an FM antenna are separated from each other. Unlike the design in which a common car radio AM and FM share one antenna, the AM antenna of the present invention is used. Reference numeral 22 denotes an unbalanced antenna circuit, and the FM antenna is a balanced antenna. The power supply voltage stabilization circuit 233 introduces a vehicle power supply and provides the stabilized power supply to the AM signal amplification circuit 231 and the FM signal amplification circuit 232.

  Also, as shown in FIG. 2, a metal base 25 is attached to the bottom of the fishfish antenna device 20 of the present invention, and its function is provided for screwing the fishfish antenna device 20 to the roof top of an automobile. In addition, it is combined with the FM antenna to enhance the signal reception capability of the FM antenna with the assistance of the metal base 25. The fishfish antenna device 20 of the present invention forms extremely good resistance matching with the radio wave receiving circuit 51, and the resistance matching value of this embodiment is approximately 50 ohms.

  Since the volume of the present invention is small, it is attached to the rooftop of an automobile to form a fish-shaped antenna that is elegantly shaped, and a fish-shaped cover 21 covers the AM antenna 22 and the signal amplification circuit board 23 to form a fish-shaped antenna. A cover 21 is attached to the roof top of the vehicle body to form an antenna shape with a beautiful appearance, thereby increasing the beauty of the antenna of the present invention.

  As a result of actual experiments, the fish-field antenna device 20 of the present invention has a radiation field type gain as shown in FIGS. 5 and 6. FIG. 5 shows the radiation field type gain during the vertical test of the antenna of the present invention. FIG. 6 and FIG. 6 are radiation field type gain diagrams in the horizontal test of the antenna of the present invention. From these figures, it can be seen that the antenna gain of the present invention is between about 0-3 dBi.

  The frequency response graph of the present invention is as shown in FIG. 7, and the frequency range shown in the figure is between 30 KHz and 300 MHz, and the embodiments of the present invention are AM and FM of 540 K to 1600 KHz and 88 to 108 MHz. In the radio frequency band, a waveform with a resistance matching value of 50 ohms (parking ratio ≦ 2) is formed to meet the matching requirements of the radio antenna design.

  Therefore, the fish-bowl type antenna device of the present invention provides a structural design different from the well-known technology according to the above description, and enhances the overall use value, and the structure is not found in the conventional technology and has a novelty. Have.

It is an external appearance three-dimensional view of the Example of this invention. FIG. 2 is a three-dimensional exploded view of FIG. 1. It is a circuit block diagram of the present invention. 1 is an electrical circuit diagram of an embodiment of the present invention. It is a radiation field type gain figure at the time of the vertical test of the antenna of this invention. It is a radiation field type gain figure at the time of the horizontal test of the antenna of this invention. It is a frequency response graph at the time of the test of this invention.

Explanation of symbols

20 Fish cage antenna device 21 Fish cage cover 22 AM antenna 23 Signal amplification circuit board 231 AM signal amplification circuit 232 FM signal amplification circuit 233 Power supply voltage stabilization circuit 234 Inductor 24 FM resonance antenna circuit 25 Metal base 51 Radio wave reception circuit

Claims (7)

A carp-type antenna apparatus for a car radio, wherein the fish-carp antenna apparatus is used in front of a radio wave receiving circuit of a car radio to receive radio frequency signals of the radio. Type antenna device
A fish carp-shaped cover with an internal space inside,
A metal base that is coupled to the fish-rod-like cover and screwed to the car body;
An AM antenna that is installed in the interior space of the fish bowl-shaped cover;
An AM signal amplifier circuit disposed above the metal base and connected to an AM antenna, an FM resonant antenna circuit, and a signal amplifier circuit board on which an FM signal amplifier circuit is disposed;
The FM resonant antenna circuit includes a plurality of inductors and an AM signal amplifier circuit to form an FM resonant circuit, and the FM resonant antenna circuit is enhanced in radio frequency band signal reception by the metal base. , Fish radio antenna device for automobile radio.   2. The fish-roof antenna device for an automobile radio according to claim 1, wherein the AM antenna is disposed on an upper part inside the fish-rooster-like cover.   2. The fish carp antenna apparatus for a car radio according to claim 1, wherein the AM antenna is an unbalanced antenna circuit.   2. The fish-roof antenna apparatus for an automobile radio according to claim 1, wherein the FM resonance antenna circuit is a balanced antenna.   2. A fish carp antenna apparatus for a car radio according to claim 1, wherein the metal base is electrically connected to the FM resonance antenna circuit to enhance the FM antenna signal reception capability. Type antenna device.   2. A fishfish antenna apparatus for a car radio according to claim 1, wherein the signal amplifier circuit board introduces a vehicle power supply and provides a stabilized power supply to the AM signal amplifier circuit and the FM signal amplifier circuit. A fishfish antenna device for an automobile radio, further comprising: 2. The fish-rooster antenna device for an automobile radio according to claim 1, wherein the AM antenna is a magnetic core coil antenna.

Images