KR100451921B1 - Antenna and its manufacturing method - Google Patents

Abstract

An antenna capable of absorbing strain stress from the outside and a method of manufacturing the same are disclosed. The rod antenna includes a powder metal wire composed of fine powder, a coating material surrounding the powder metal wire, and a lower metal part formed at a lower end of the coating material and connected to the powder metal wire. The coil antenna includes a housing of the coil antenna and a fine powder inside the coil antenna. Consists of a coil formed, and comprises a connector formed at the bottom of the housing of the coil antenna. By forming the metal wires and coils inside the antenna formed to transmit and receive radio waves by compressing the fine powder, the metal wires and coils are prevented from being broken even when the antenna is bent due to an impact from the outside, thereby preventing the Does not affect sending and receiving.

Description

Antenna and its manufacturing method

The present invention relates to an antenna and a method of manufacturing the same, and more particularly, to an antenna having improved durability against deformation stress from the outside and a method of manufacturing the same.

In general, communication signal transmission is divided into wireless communication using electromagnetic waves and wired communication using conductor lines according to transmission methods.

An antenna is an important device that is indispensable in wireless communication using electromagnetic waves, and 'an apparatus that radiates radio wave energy transmitted from a transmitter effectively into free space as electromagnetic waves or effectively captures and transmits the radiated energy to a receiver. ',' Relay device that combines radio transmitter and receiver and space '.

Antenna technology is one of the important technologies that determine the overall function and performance of the communication service, and the development of a new type of antenna has been steadily researched to efficiently use various communication services. The development of domestic antenna technology is closely related to wireless communication, and it is possible to estimate the ship radio telegraph, which is the first wireless communication using a ship antenna, between Wolmi in Incheon and Kwangjeho, an imperial warship in Incheon in 1910. In the late 1950s, radio communication technology began to be introduced and researched in earnest with the production of radios and black and white TV broadcasting.In the 1980s, domestic wireless communication technology was promoted in earnest, enabling systematic technology development. Based on the development history of wireless communication technology, the history of technology invention and design in antenna field has changed.

In addition, antenna technology has been steadily developed with the development of communication systems. In recent years, remarkable developments in communication systems are mainly in the fields of mobile communication and satellite communication. In particular, the trend of personalization of mobile systems has led to researches on small, light and thin antenna structures suitable for mobile and portable applications, and research and development on antennas that require high performance such as high efficiency, broadband, and excellent beam control capability, such as smart antennas. Recently, advanced countries are in full swing, and satellite antenna is being developed into a multi-spot beam antenna technology, which is composed of a set of high-gain adaptive antennas to be applied as a technology that can cover a large area. have.

On the other hand, radio calling in the mobile communication field has adopted the UK's POCSAG single method in 1990 since the introduction of Japan's NEC method in 1982, and since the end of the 1990s, wide area service has been promoted. Patents have been applied for antennas since the late 1980s, and the number of applications for radio calling antennas, car phone antennas and cellular phone antennas has increased, and the technology has been advanced.

Recently, due to the development of semiconductor circuit technology, the development of not only planar and printed circuit antennas and multilayer array antennas, but also active antennas, slots and waveguide antennas in which active elements are integrated on a single substrate has begun to increase.

In this way, a wireless antenna for transmitting and receiving radio waves is installed in a wireless communication device including a mobile phone. The wireless antenna is generally composed of a lower antenna connected to a connector and an upper antenna movably housed in the lower antenna, thereby making it easy to carry a mobile phone, protecting a human body from electromagnetic waves, and transmitting and receiving radio waves well. do. The lower antenna may be called a transformer according to its function, and the upper antenna may be called a radiator.

As such a structure, a mobile end feed antenna for a mobile phone is disclosed in Korean Patent Application No. 97-67800 (name of the invention: mobile end feed antenna for mobile phone) filed with the Korean Patent Office on December 11, 1997.

1 is an exploded cross-sectional view of the end feed antenna for a mobile phone described in the preceding application.

Referring to FIG. 1, the end feed antenna 1 for a mobile phone includes a lower antenna 10 and an upper antenna 20 coupled to the lower antenna 10 to enable vertical movement.

The bottom of the lower antenna 10 is provided with a connector 30 for transmitting the received radio waves to a circuit unit (not shown) inside the mobile phone, or for transmitting an electrical signal generated from the circuit unit to the lower antenna 10. The lower antenna 10 has a first hollow hole 40 therein and a first helical coil 50 longitudinally wound on an outer surface of the first housing 15 made of a transparent material and the first housing 15. ). The first helical coil 50 serves to transmit or receive radio waves to the upper antenna 20, and the first loop coil part 60 is integrally formed at an upper end thereof. The first looped coil unit 60 has a form in which at least one annular coil is overlapped.

The upper antenna 20 is coupled to the upper and lower slides in the first hollow hole 40 of the first housing 15 so as to be movable, and the inside of the second housing 25 and the second housing 25 made of a transparent material. And a second helical coil 55 wound in the longitudinal direction.

Typically, the second hollow hole 45 is formed in the second housing 25, and the second helical coil 55 is installed on the inner wall of the second hollow hole 45.

The second helical coil 55 serves to transmit or receive radio waves from the lower antenna 10, and the second loop coil part 65 is integrally formed at the lower end thereof. The second looped coil unit 65 has a form in which at least one annular coil is overlapped. The second looped coil part 65 is disposed horizontally with respect to the first looped coil part 60.

On the other hand, when the upper antenna 20 is fully extended from the lower antenna 10, a wave transmission path is formed between the first and second loop-type coil units 60 and 65.

However, in the conventional antenna, the conductive means formed inside the upper antenna is formed of a helical coil, and the inside of the first housing including the helical coil becomes empty, and the antenna is bent due to an impact from the outside. When losing, the helical coil formed inside the upper antenna is easily broken. Accordingly, there is a problem that the radio wave reception and transmission efficiency of the antenna is degraded due to the damage of the antenna.

Accordingly, a first object of the present invention is to provide an antenna having improved durability against strain stresses from the outside.

It is also a second object of the present invention to provide a method of manufacturing an antenna having improved durability against strain stresses from the outside.

1 is an exploded cross-sectional view of a conventional antenna device.

2 is a cross-sectional view of a rod antenna according to Embodiment 1 of the present invention.

3 is a view showing a state in which the rod antenna is bent by the deformation stress from the outside.

4 is a perspective view of a coil antenna according to Embodiment 2 of the present invention.

5 is an exploded cross-sectional view of a device equipped with a rod antenna and a coil antenna according to Embodiment 3 of the present invention.

<Explanation of symbols for main parts of drawing>

100: rod antenna 105: fine powder

110: metal wire 120: housing of the rod antenna

130: lower metal part 140: cap

150: coil antenna 160: housing of the coil antenna

170: coil 180: first hole

185: second hole 190: connector

200: antenna housing 210: metal layer

220: housing hole

In order to achieve the first object of the present invention described above, the present invention provides a rod antenna including a metal wire, a housing of the rod antenna, and a lower metal part.

The metal wire is formed into a rod shape, preferably a cylindrical shape, in which fine powder of metal is compression molded.

The housing of the antenna surrounds the outside of the fine powder except for the bottom surface of the cylindrical fine powder.

The lower metal part is formed at the lower end of the housing of the antenna to surround the fine powder exposed on the lower surface of the housing of the antenna and the lower end of the housing of the antenna.

In addition, the present invention provides a coil antenna including a coil and a housing of the coil antenna, and a connector in order to achieve the first object of the present invention described above.

The coil is formed by compression molding of fine metal powder.

The housing of the coil antenna has a first hole formed therein, the coil is formed surrounding the first hole in the peripheral portion of the first hole.

The connector is formed in the lower end of the housing of the coil antenna and is connected to the lower end of the coil.

In order to achieve the second object of the present invention described above, the present invention provides a method of forming a housing of a rod antenna, filling a fine powder of metal into a housing of the rod antenna, and filling the fine powder of the filled metal. It provides a method of manufacturing an antenna comprising the step of forming a metal wire by compression, and forming a bottom metal portion.

The forming of the housing of the rod antenna is a step of forming a housing of a cylindrical antenna having a lower end and a closed upper end and having an empty inside. The housing of the antenna then uses a flexible material having a strength that can withstand the pressure of about 250-350 kg / cm 2 used to compress the fine powder of the metal.

Filling the fine powder of the metal into the housing of the rod antenna and forming a metal wire by compressing the rod antenna by compressing the fine powder of the metal to a pressure of about 250 ~ 350kg / ㎠ using a dry molding method Filling the inside of the housing with fine powder of metal.

The forming of the bottom metal part is a step of forming the bottom metal part to be in contact with the metal wire at the bottom of the housing of the rod antenna.

Further, in order to achieve the above-described second object of the present invention, the present invention provides a method for forming a housing of a coil antenna having first and second holes, and fine powder of metal in the second hole of the housing of the coil antenna. It provides a method of manufacturing an antenna comprising the step of filling, forming a coil by compressing the fine powder of the filled metal, and forming a connector.

Forming the housing of the coil antenna is a step of forming a first hole in the interior of the housing of the cylindrical antenna, and forming a coil-shaped second hole in the periphery of the first hole.

Filling the fine powder of the metal into the second hole of the housing of the coil antenna, and compressing the fine powder of the filled metal to form a coil is fine powder of the metal in the second hole of the housing of the coil antenna After completely filling the, the step of forming a coil by compressing the fine powder of the metal filled in the second hole to a pressure of about 250 ~ 350kg / ㎠ using a dry molding method.

The forming of the connector is a step of forming the connector as a metal material to be in contact with the coil exposed on the bottom surface of the coil antenna and to protrude a portion of the connector under the coil antenna.

According to the method of manufacturing an antenna according to the present invention, a metal wire formed inside an antenna for transmitting a received radio wave to a circuit inside an apparatus equipped with the antenna or transmitting an electric signal generated from the circuit to the outside is fine of metal. By forming the powder, even when the antenna is bent due to an external impact, the fine powders of the metal are connected to each other to prevent the metal wire from being broken. Therefore, the external impact does not affect the transmission and reception of the radio signal. .

Hereinafter, an antenna device and a method of manufacturing the same according to the present invention will be described in detail with reference to the embodiments, but the following embodiments do not limit or limit the present invention.

Example 1

2 illustrates a cross-sectional view of the rod antenna according to the present embodiment.

Referring to FIG. 2, the rod antenna 100 includes a metal wire 110, a housing 120 of the rod antenna surrounding the metal wire 110, and a lower metal part 130 formed at a lower end of the housing 120 of the rod antenna. Include.

Metal wire 110 is formed of a fine powder 105 of a metal having an average particle size of about 0.5 ~ 10㎛ in a cylindrical shape. Since the fine powders 105 are formed by compression molding by a dry molding method, voids between the fine powders 105 are minimized, and the fine powders 105 are connected to each other without disconnection. Therefore, since the metal wire 110 formed of the fine powder 105 is always in contact with the fine powder 105 in spite of the external impact such as bending and bending, the antenna characteristic of receiving and transmitting the radio wave under the external strain stress is excellent. Will not be affected.

The housing 120 of the rod antenna is formed on the metal wire 110 except for the bottom surface of the metal wire 110. Accordingly, the housing 120 of the rod antenna surrounds the metal wire 110 to a predetermined thickness outside the metal wire 110, and the fine powder 105 of the metal wire 110 is disposed on the bottom surface of the housing 120 of the rod antenna. Exposed. The housing 120 of the rod antenna not only serves as a frame for forming the metal wire 110 of the fine powder 105 but also serves to protect the rod antenna 100 from the outside. In addition, the upper end of the housing 120 of the rod antenna is formed to have a greater thickness than the stop and the lower end of the housing 120 of the rod antenna. This is because when the rod antenna 100 is completely inserted into the antenna housing (not shown) of the device on which the load antenna 100 is mounted, the upper end of the inner hole (not shown) of the antenna housing and the housing 120 of the load antenna are shown. The upper end portion is in contact so that the rod antenna 100 is not easily drawn out by the minute impact from the antenna housing.

In addition, a cap 140 is formed on an upper end surface of the rod antenna 100. The cap 140 prevents the rod antenna 100 from being difficult to pull out when the rod antenna 100 is drawn into the antenna housing and becomes invisible when the rod antenna 100 is inserted into the antenna housing. Therefore, the cap 140 is in contact with the upper end of the antenna housing when the rod antenna 100 is introduced.

The lower metal part 130 surrounds a lower end and a lower end surface of the housing 120 of the rod antenna and a lower end surface of the exposed metal wire 110 at the lower end of the rod antenna 100 formed as described above. The lower metal part 130 transmits a radio wave received from the outside through the load antenna 100 to a metal layer (not shown) formed inside the antenna housing, thereby providing a circuit part inside the device mounted with the load antenna 100 (not shown). Or electrical signals generated from the circuit portion to the load antenna 100 through the metal layer.

Hereinafter, a method of manufacturing a rod antenna according to the present embodiment will be described in detail with reference to a cross-sectional view of the rod antenna shown in FIG. 2.

The lower end portion is opened and the upper end portion forms a housing 120 of a rod antenna having a hole formed therein. The housing 120 of the rod antenna is made of a flexible material, for example a synthetic resin such as polyethylene, polyvinyl chloride, or the like, or a material such as rubber.

Subsequently, the lower end portion is filled to fill the metal fine powder 105 in the hole of the housing 120 of the rod antenna. The metal fine powder 105 is composed of one or more of a group consisting of silver (Ag), gold (Au), platinum (Pt), copper (Cu) and nickel (Ni), and has an average of about 0.5 to 10 μm. It consists of a powder of particle size, preferably of an average particle size of about 1.0 μm. In preparing the fine powders 105, powders having a particle size of about 1.0 μm or less of the metals used as the fine powder 105 are quite dangerous and generally those within the 50 μm range easily combine with oxygen in the air to ignite and explode most of them. There is this. Therefore, care is required in handling fine powder.

Subsequently, the filled fine powder 105 is compressed to a pressure of about 250 to 350 kg / cm 2, preferably about 270 kg / cm 2, using a dry molding method used in a fine molding method or a ceramic molding method. The metal wire 110 is formed by completely filling the hole of the housing 120. The fine powder 105 of metal is preferably uniformly filled in the housing 120 of the rod antenna, and the pressure is dependent on the strength of the material used as the housing 120 of the rod antenna. Pressurize to a pressure that does not damage it.

After the housing 120 of the rod antenna is completely filled with the fine powder 105, the open of the housing 120 of the antenna is brought into contact with the fine powder 105 exposed in the open portion of the housing 120 of the rod antenna. The bottom metal part 130 of the antenna 100 is formed by surrounding the portion and the bottom part with a conductive metal.

3 is a view showing a state in which the rod antenna is bent by the deformation stress from the outside.

Referring to FIG. 3, the rod antenna 100 manufactured by the method of manufacturing the rod antenna according to the present invention described above may be fine inside the housing 120 of the rod antenna even when the rod antenna 100 is bent due to an external impact as shown in FIG. 4. Since the metal wires 110 formed of the powder 105 are connected to each other without breaking, the transmission and reception of radio waves are not affected.

Example 2

4 is a perspective view of the coil antenna according to the present embodiment.

Referring to FIG. 4, the coil antenna 150 may include a housing 160 of the coil antenna, a coil 170 formed inside the housing 160 of the coil antenna, and a connector formed at the bottom of the housing 160 of the coil antenna. 190).

Coil 170 is formed of fine powder of a metal having an average particle size of about 0.5 ~ 10㎛. Since the fine powders are formed by compression molding by a dry molding method, voids between the fine powders are minimized, and the fine powders are seamlessly connected to each other. Therefore, since the fine powders are always connected to each other even when the coils formed of fine powders are bent and bent, the antenna characteristics of receiving and transmitting radio waves are not affected by external deformation stress.

The housing 160 of the coil antenna is formed with the first hole 180 therein while surrounding the coil 170. In addition, the coil 170 is not exposed to the upper end of the housing 160 of the coil antenna, and the lower end of the coil 170 is exposed to the lower end of the housing 160 of the coil antenna to be formed at the lower end of the housing 160 of the coil antenna. It is in contact with the connector. The housing 160 of the coil antenna not only serves as a frame for forming the coil 170 as described above, but also protects the coil antenna 150 from the outside.

The connector 190 is formed at the lower end of the housing 160 of the coil antenna and is connected to the lower end of the coil 170. The connector 190 is formed in a screw shape in order to mount the coil antenna 150 to the antenna device. Accordingly, the connector 190 not only serves to connect the coil antenna 150 and the metal layer of the device on which the coil antenna 150 is mounted, but also transmits radio waves received from the outside through the coil antenna 150 to the coil antenna 150. ) Is delivered to the device on which the device is mounted, or the electrical signal generated from the device is transmitted to the coil antenna 150.

Hereinafter, a method of manufacturing a coil antenna according to the present embodiment will be described in detail with reference to the perspective view of the coil antenna shown in FIG. 4.

A first hole 180 is formed in the housing 160 of the cylindrical coil antenna, and a coil-shaped second hole 185 is formed in the periphery of the first hole 180. The first hole 180 is integrally formed from the upper end of the housing 160 of the coil antenna to the lower end of the housing 160 of the coil antenna, and the second hole 185 is closed to the lower end of the second hole 185. Therefore, only the lower end of the second hole 185 is opened at the lower end of the housing 160 of the coil antenna. The housing 160 of the coil antenna is made of a flexible material, for example a synthetic resin such as polyethylene, polyvinyl chloride, or the like, or a material such as rubber.

Subsequently, the lower end portion is opened to fill the second hole 185 having an empty interior with fine powder of metal. The fine powder of the metal is composed of any one or more of the group consisting of silver (Ag), gold (Au), platinum (Pt), copper (Cu) and nickel (Ni), the average particle size of about 0.5 to 10㎛, Preferably it consists of a powder of average particle size of about 1.0 μm. In preparing fine powders, powders with a particle size of about 1.0 μm or less of metals used as fine powders are quite dangerous and generally those within the 50 μm range easily ignite and explode because they readily combine with oxygen in the air. Therefore, care is required in handling fine powder.

Subsequently, the filled fine powder is compressed to a pressure of about 250 to 350 kg / cm 2, preferably about 270 kg / cm 2, using a dry molding method used in a fine molding method or a ceramic molding method. The coil 170 is formed by completely filling the second hole 185. The fine powder of metal is preferably uniformly filled in the housing 160 of the coil antenna, and the pressure does not damage the housing 160 of the coil antenna according to the strength of the material constituting the housing 160 of the coil antenna. Pressurize to a pressure that is not enough.

After filling and compressing the second hole 185 of the housing 160 of the coil antenna completely with fine powder, the housing of the coil antenna to contact the coil 170 exposed at the bottom of the housing 160 of the coil antenna. The connector 190 is formed using a conductive metal at the bottom of the 160. The connector 190 is formed in a screw shape in order to mount the coil antenna 150 to the antenna device.

Therefore, even when the coil antenna 150 is bent or bent by an external strain, the coil 170 made of the fine powder of metal is connected without breaking, so that an external shock affects transmission and reception of a radio signal. Will not affect.

Example 3

5 is an exploded cross-sectional view of an antenna device for a wireless communication device equipped with a rod antenna and a coil antenna according to the present embodiment.

Referring to FIG. 5, the antenna device includes a rod antenna 100 according to Embodiment 1 shown in FIG. 2, a coil antenna 150 according to Embodiment 2 shown in FIG. 3, and an antenna housing 200. . Accordingly, in Fig. 5, the same reference numerals are used for the same members as Figs.

The antenna housing 200 has a housing hole 220 having a length capable of sliding movement of the rod antenna 100 and accommodating the rod antenna 100.

A metal layer 210 is formed at an upper end of the housing hole 220 of the antenna housing 200 to be connected to a transmission / reception circuit unit (not shown) of a wireless communication device. The inside of the metal layer 210 has a nut shape and is coupled to the connector 190 of the coil antenna 150 having a screw shape. Accordingly, the coil antenna 150 is mounted on the antenna housing 200, and the coil antenna 150 is electrically connected to the transmitting / receiving circuit part of the wireless communication device. In addition, as the first hole 180 and the housing hole 220 of the coil antenna 150 are connected, the rod antenna 100 can be pulled in and out. Therefore, the inner diameter of the first hole 180 and the housing hole 220 is larger than the outer diameter of the housing 120 of the rod antenna. In addition, the inner diameter of the connector 190 is smaller than the inner diameter of the first hole 180 and the housing hole 220, is larger than the outer diameter of the housing 120 of the rod antenna, and the lower metal part 130 of the rod antenna 100. Coincides with the outer diameter of Therefore, after the rod antenna 100 is inserted into the first hole 180 of the coil antenna 150, the insertion and withdrawal of the rod antenna is freed from the coil antenna 150, and the rod antenna 100 is connected to the coil antenna 150. When fully withdrawn, the upper end of the lower metal part 130 is fitted into the connector 190, so that the rod antenna 100 and the coil antenna 150 are electrically connected to the circuit part of the wireless device device. The outer diameter of the lower end of the lower metal part 130 is larger than the inner diameter of the connector and smaller than the housing hole 220, so that when the rod antenna 100 is completely drawn out from the antenna housing 200, the upper part of the antenna housing 200 is disposed on the upper part of the antenna housing 200. It is prevented from being completely separated from the formed coil antenna 150.

In this embodiment, the rod antenna 100 is the same as the device of the first embodiment, and the coil antenna 150 is the same as the device of the second embodiment.

Therefore, as described above, the wireless device communication device is equipped with a rod antenna and a coil antenna including a metal wire and a coil made of fine powder of metal, so that transmission and reception of radio waves from external shocks can be made safely.

According to the antenna according to the present invention and a method for manufacturing the same, fine powder of metal wires formed inside the antenna for transmitting the received radio wave to a circuit inside the device equipped with the antenna, or for transmitting an electrical signal generated from the circuit to the outside. By filling with metal and compressing, the fine powders are connected to each other even when the antenna is bent due to an external impact. Therefore, even when the antenna is bent from an external impact, the metal wire is prevented from being broken so that the transmission and reception of the radio signal is not affected.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified without departing from the spirit and scope of the invention described in the claims below. And can be changed.

Claims (8)

In the antenna of a wireless communication device, A housing of the rod antenna; A metal wire made of fine powder inside the rod antenna; And And a lower metal part formed at a lower end of the housing of the rod antenna. In the antenna of a wireless communication device, A housing of the coil antenna having a first hole therein; A coil comprising fine powder formed inside the housing of the coil antenna surrounding the first hole; A coil antenna comprising a connector formed inside the bottom of the housing of the coil antenna. The antenna of claim 1 or 2, wherein the fine powder has an average particle size of about 0.5 to 10 mu m. The antenna of claim 1 or 2, wherein the fine powder is composed of any one or more of a group consisting of silver, gold, platinum, copper, and nickel. The antenna according to claim 1 or 2, wherein the housing of the antenna is made of a flexible material. In the manufacturing method of the antenna of a wireless communication device, Providing a housing of the rod antenna with the bottom open and the top closed; Filling a fine powder of metal into the housing of the rod antenna; Compressing the fine powder of the filled metal to form a metal wire; And And forming a lower metal part in contact with a metal wire at a lower end of the housing of the rod antenna. In the manufacturing method of the antenna of a wireless communication device, Forming a first hole in the cylindrical coil antenna housing and forming a coil-shaped second hole in the periphery of the first hole; Filling a fine powder of metal into the coil-shaped second hole; Compressing the fine powder of the filled metal to form a coil; And And forming a connector in contact with the coil at a lower end of the housing of the antenna. 8. The method of claim 6, wherein the compressing the fine powder of the filled metal is compressed to a pressure of about 250 to 350 kg / cm 2 using a dry molding method.