KR100477197B1 - Direct molding antenna - Google Patents

Abstract

Disclosed is a direct conducting antenna of an integral conduction type which eliminates the need for processing and assembly of feed connectors and helical antennas. An antenna structure of a wireless communication device suitable for use in a compact and lightweight wireless communication device includes an electrically insulating bobbin having a predetermined shape of a receiving groove formed in a circumferential surface thereof, an accommodation groove formed in the bobbin and one end of the bobbin for power feeding. And an integral conductive antenna portion formed of a conductive material together with the connector to be positioned to simultaneously perform the functions of a cylindrical antenna and a feed connector, and an insulated body cover covering an outer portion of the bobbin and an outer portion of the integral conductive antenna portion. This eliminates the need to process feed connectors and springs separately, eliminates spring winding and soldering operations, reduces variations in electrical characteristics, reduces costs for quality inspection and production control, and reduces weight. It has the effect of removing the restriction.

Description

Direct molding antenna

The present invention relates to an antenna for a wireless communication device, and more particularly, to an integrated type antenna that can be manufactured at a lower cost without degrading the electrical characteristics of the antenna for the wireless communication device.

In general, a wireless antenna employs a conventional antenna to perform wireless communications. The high frequency signal output from the modulator of the wireless communication device is transmitted to the air after being applied to the antenna employed as one of the important components of the wireless communication device, and the wireless high frequency signal transmitted through the air is used for the antenna. Via the demodulator.

In order to improve the electrical characteristics during the transmission and reception of such an antenna, the impedance of the antenna and the impedance of the transceiver are matched with each other according to the frequency to be transmitted and received to improve transmission and reception sensitivity, and to prevent unnecessary strategic radiation and the like. You should write it down. In addition, an attempt to lower the manufacturing cost of the antenna is required to secure product competitiveness of the wireless communication device.

Recently, with the increasing use of personal wireless communication devices such as hand held and mobile cellular and personal communication service (PCS) telephones, various types of antennas have been disclosed in the art.

1 shows an example of an antenna structure of a conventionally known portable radiotelephone. Referring to the drawings, the antenna assembly 200 includes a handle 21 for use when extending or receiving a needle antenna, an insulator portion 22 extending to the handle 21, and a portable radiotelephone body 100. A helical antenna 23 which is coupled to the whip antenna and individually operated when the whip antenna is accommodated, and a rod wire which is combined with the helical antenna 23 when the needle antenna is extended to serve as an antenna as a whole. a rod wire (or whip) antenna 24.

In FIG. 1, referring to a detailed structure of the helical antenna 23, a spring 25 embedded in the body cover 2, a feed connector 4-1 electrically coupled to one end of the spring 25, and the An insulating bobbin 3 is shown having a spring 25 fitting groove therein for supporting the spring 25. Here, the helical antenna 23 including the spring 25, the bobbin 3, the feed connector (4-1), etc., as shown in Figs. It is produced by assembling and performing injection molding.

Referring to FIGS. 2 and 3, which are drawings for explaining a manufacturing process of a conventional helical antenna, a power feeding connector 4 having a coupling screw portion 4B at one end and a soldering hole 4A at the other end thereof is formed. 1) is shown in part preparation step 2-A, and a cap cap: 1 having an engaging portion 1A at one end is shown in part preparation step 2-B. In addition, the helical type spring 25 is shown in the component preparation process 2-C of FIG. The feed connector 4-1 prepared in the component preparation step 2-A is inserted into a mold having the shape of the bobbin 3 in the mold cavity in 2-D indicating the insert injection molding process. When insert injection molding is completed, the other end of the feed connector 4-1 is integrally formed with the bobbin 3. Here, a receiving groove 3C for accommodating the spring 25 is formed on the outer circumferential surface of the bobbin 3 by the injection molding. In 2-E indicating a spring joining and soldering process, the spring 25 is wound in the receiving groove 3C of the bobbin 3 and then at one end A positioned in the soldering hole 4A. Soldering is performed. After the soldering process is completed, the primary measurement is performed to see if the electrical characteristics of the antenna are satisfied, and the assembly process shown in FIG. 3 is performed. 3-A in FIG. 3 indicates a body cover injection molding process. The metal mold | die used in this process is a metal mold | die of the size which accommodates the result of the said 2-E process inside, and has the size of the said body cover 2 more compared with the size of the result of the said 2-E process. As a result, when the resultant of the 2-E process is inserted into the mold and injection molded, the resultant of the 3-A process in which the body cover 2 is manufactured is obtained. The result of the 3-A process is combined with the cap 1 prepared in the 2-B process, which is a 3-B process indicating the cap bonding process. After the 3-B process is completed, second measurement is again performed and visual inspection is performed. The good product passed up to the appearance inspection is only shipped through the washing and packaging process.

Here, it should be noted that the manufacturing process of the helical antenna illustrated in FIGS. 2 and 3 is an example in which the combination with the whip antenna 24 shown in FIG. 1 operates alone. If the product is combined with the whip antenna 24, it is apparent that in addition to the above-described process, the whip antenna (also referred to as a "vertical grounding monopole antenna") and the assembly process with the helical antenna are further performed.

As described above, the manufacturing process of the antenna including the conventional manufacturing process of the helical antenna and the coupling with the whip antenna has a problem that the antenna manufacturing cost is expensive for the following reasons.

First, a spring 25 having a good electrical conductivity such as beryllium bronze or the like and preparing a feed connector 4-1 having a plated layer formed thereon, and having good conductivity and high strength by plating or coating treatment 25 ), Because it must be processed separately, manufacturing costs are expensive.

Secondly, in 2-E indicating a spring joining and soldering process, the spring 25 must be wound in the receiving groove 3C of the bobbin 3, and then the end of the work is wound around the one end A. Since other soldering work has to be performed, there is a problem in that the number of processes of the work is increased and the work connection is not smooth, and thus the simplicity of the assembly work is difficult to be guaranteed.

Third, as a result of assembling and injection molding each of the individually processed components, there is a serious problem of variations in electrical characteristics.

Fourth, the number of components and the number of assembling processes are large, there is a problem that the cost required for quality inspection and production control increases accordingly.

Fifth, there is a problem in that the weight of each component is significant, and the weight of the entire antenna is heavy, which limits the miniaturization and weight of the wireless communication device.

Therefore, a new antenna structure and its manufacturing technology, which can meet the electrical characteristics of the antenna such as gain, frequency band, coupling efficiency, radiation requirements, etc., can reduce the number of assembly processes, facilitate assembly work, and lower the antenna manufacturing cost. It is requested.

Accordingly, an object of the present invention is to provide an antenna structure of an improved portable wireless communication device that can solve the above-mentioned conventional problems.

It is another object of the present invention to provide an improved antenna assembly structure that can reduce the number of assembly processes and facilitate assembly work while lowering the antenna manufacturing cost while satisfying the electrical characteristics of the antenna.

It is still another object of the present invention to provide an integrated conductive direct molded antenna that eliminates the need for processing and assembly of feed connectors and helical (or helical-like antenna) antennas.

It is still another object of the present invention to provide a direct molded antenna suitable for use in the exterior or interior of a miniaturized wireless communication device.

Another object of the present invention is to eliminate the need to separately process the feed connector and the spring, there is no need for spring winding and soldering operation, can lower the deviation of the electrical characteristics, reduce the cost of quality inspection and production control It is possible to provide an improved antenna structure that can reduce the size and weight of the device.

It is still another object of the present invention to provide an antenna manufacturing method which can reduce the number of assembly processes and ease the assembly workability while satisfying the electrical characteristics of the antenna.

It is still another object of the present invention to provide a method of manufacturing an integrated conductive direct molded antenna that eliminates the need for processing and assembling a feed connector and a helical (or helical-like antenna) antenna.

It is still another object of the present invention to provide a method for manufacturing a direct molded antenna suitable for use in the exterior or interior of a miniaturized wireless communication device.

According to one aspect of the present invention, an antenna structure of a wireless communication device is provided; The receiving groove having a predetermined shape is formed of a conductive material together with the electrically insulating bobbin formed on the circumferential surface, and the receiving groove formed on the bobbin and a portion extending from one end of the bobbin to place the connector for feeding. And an insulated body cover covering the outside of the bobbin and the outside portion of the integral conductive antenna unit to simultaneously perform the function.

According to another aspect of the present invention, there is provided an antenna assembly structure of a wireless communication device, comprising: an electrically insulating bobbin having a receiving groove of a predetermined shape formed on a circumferential surface thereof; An integrally conductive antenna portion extending from one end of the bobbin and one end of the bobbin and formed of a conductive material together at the portion where the power feeding connector is to be positioned, and simultaneously performing the functions of a cylindrical antenna and a power feeding connector; An insulating body cover covering an outer portion of the bobbin and an outer portion of the integrated conductive antenna portion; And a load wire antenna which is extended and received with respect to the apparatus through an inner diameter of the bobbin and an inner diameter of the integrated conductive antenna portion.

According to still another aspect of the present invention, there is provided a method of manufacturing an antenna of a wireless communication device, comprising: a first step of preparing an electrically insulating bobbin having a receiving groove having a predetermined shape formed on a circumferential surface thereof; Forming a conductive groove portion formed in the bobbin and the portion of the bobbin extending to one end of the bobbin and formed of a conductive material together to perform the functions of the cylindrical antenna and the feed connector at the same time to insert injection molding process A second process; And a third process of forming an insulating body cover covering an outer portion of the bobbin and an outer portion of the integrated conductive antenna unit by an injection molding process.

Hereinafter, a preferred embodiment of a direct molding type antenna and antenna assembly structure and manufacturing method according to an embodiment of the present invention will be described with reference to the accompanying drawings. Although shown in different drawings, the same or similar parts are represented by the same or similar reference numerals.

4 and 5, a manufacturing process and antenna structure of a direct molding antenna according to an embodiment of the present invention is shown.

First, in the antenna structure of the radio communication apparatus formed through the 5-A process of FIG. 5, it is seen that the integral conductive antenna unit 4 is formed on the electrically insulating bobbin 3 in which a receiving groove having a predetermined shape is formed on the circumferential surface. . The unitary conductive antenna unit 4 is formed by supplying a conductive material to a portion where the connector 4B for power feeding extends to one end of the receiving groove 3C and the bobbin 3 formed in the bobbin 3. will be. That is, the integral conductive antenna unit 4 is formed by injection molding at the same time with a conductive material of the same material, and simultaneously performs the functions of the conventional cylindrical antenna 25 and the power feeding connector 4-1. An outer insulating body cover 2 is covered by injection molding on the outside of the bobbin 3 and on the outer part of the integrated conductive antenna section 4.

A process of preparing the resultant of FIG. 5-A will be described with reference to FIG. 4. Referring to Figure 4, the cap 1 of an insulating material having a coupling portion 1A at one end is shown as a part preparation process 4-A, and the outer peripheral surface to accommodate a cylindrical antenna such as a conventional spring 25 The bobbin 3 of insulating material having a receiving groove 3C for the purpose is shown as the part preparation process 4-B. Here, the inner shape of the receiving groove 3C is typically circular, but may be triangular, square, trapezoidal, or semicircular. The component preparation steps 4-A and 4-B are usually manufactured in large quantities by a conventional injection molding method in which an insulating resin is injected into a mold having a plurality of cavities to obtain a plurality of parts in one injection molding. Here, the component preparation process 2-A and the component preparation process 2-C of FIG. 2 are no longer necessary, and the work of processing and managing the feed connector 4-1 and the helical type spring 25 is eliminated.

The direct molding process 4-C, which is most important for achieving the object of the present invention, is now described. 4-C process of FIG. 4 refers to a process of inserting the result of the 4-B process into a mold cavity having the shape of the integrated conductive antenna unit 4 to perform one injection molding operation. When insert injection molding of the 4-C process is completed, the bobbin 3 has a portion 4A to function as a cylindrical antenna including both a portion 4B to serve as the feed connector and a helical or stage type. It is formed integrally with. Here, by the completion of the 4-C process, it can be seen that the conventional 2-E process indicating the spring coupling and soldering process is completely removed.

Here, the conductive material of the integrated conductive antenna unit 4 may be an injection molding material reinforced with carbon fibers based on polybutylene terephthalate resin (PBT resin). In addition, it may be one selected from LUCON's PX series, PS series, PL series, CP series, PO series, MX series, PN series, SU series, or PA series. The "LUCON", a conductive resin introduced and produced by LG Chemical Co., Ltd., known in Korea, is characterized by having a wide range of conductivity using various kinds of conductive additives. The conductive additive can be used according to the use from carbon black to stainless steel, and the reinforcing agent as the conductive additive type includes PAN-based carbon fibers, Pitch-based carbon fibers, nickel-coated carbon fibers, copper fibers, and stainless steel fibers. Carbon black, aluminum flakes and metal powder. In terms of use and characteristics, ABS-based PS-3200 is characterized by containing conductive carbon black in HIPS, PS-4200 is based on ABS, carbon fiber and inorganic fillers are added as a conductive reinforcing material. As PP (Polypropylene) series, PL-2000 reinforces carbon fiber, a conductive reinforcing material based on PP, and PL-3400 mixes carbon black and inorganic filler, which is a conductive filler, based on PP. As a PC (Polycarbonate), the CP-2000 series reinforces carbon fiber in PC resin and has excellent rigidity and conductivity. The CP-4400 series reinforces glass fiber and carbon fiber, a conductive reinforcing material, based on PC resin. On the other hand, as Modified Polyphenylene Oxide (mPPO), PO-5300L, PO-5300M, PO-5300L, PO-3000 and PO-3100L have been introduced. And, as PBT (Polybytylene Terephthalate), PX-2200 is reinforced with carbon fiber, a conductive reinforcing material based on PBT resin, providing a beautiful appearance, chemical resistance and low distortion, PX-2200C improves low distortion PBT and PC are mixed for this purpose. MX-2250 is a molding agent that reinforces carbon fiber in PBT resin to improve the problems of distortion and impact characteristics. As PA (Polyamide), the PN-2000 series reinforces carbon fiber, a conductive reinforcing material based on PA6, and is known to have excellent rigidity and conductivity, and PN-5100 and PN-43000F have high conductivity. As PSU (Polysulfone), SU-5300L, PSU-5300ML, SU-5250M, and SU-5300H are known. As PPA (Polyphthalamide), PA2000 series is reinforced with carbon fiber, a conductive reinforcing material, and has excellent appearance and distortion characteristics. It is supposed to be.

In addition, the conductive material of the integrated conductive antenna unit may be a cool polymer composite material. Cool-Polymer, an injection molded thermally conductive polymer composite, was introduced by Cool Polymer Inc, a subsidiary of Chip Coolers Inc. of Warwick. The injection-molding polymer composite developed was named "CoolPoly" and its thermal conductivity ranged from 10W / m-K, similar to that of stainless, to 100W / m-K, similar to that of cast aluminum. CoolPoly weighs 40% of the weight of aluminum, and is molded with the intention of enhancing functionality and components, and does not require any additional processing. Developed as an alternative to plastics, CoolPoly has been found to have no hot spots that can reduce mechanical properties or dimensional stability, and has the ability to transfer heat more efficiently. Thermal conductivity is provided by nonmetals, thermally conductive materials that are evenly distributed in the composite, which accounts for 10% to 70% of the volume. The material meets the VO requirements of the UL 94V flammability test and has features that make it useful in electrically conductive or non-conductive materials, says Dr. Jim Miller of CoolPoly.

After the 4-C process, the primary measurement is performed to see if the electrical characteristics of the antenna are satisfied, and the assembly process shown in FIG. 5 is performed. 5-A in FIG. 5 indicates a body cover injection molding process. The metal mold | die used in this process is a metal mold | die of the size which accommodates the resultant of the said 4-C process inside, and has the size of the said body cover 2 more compared with the size of the resultant of the said 5-A process. As a result, when the result of the 4-C process is inserted into the mold and injection molded, the result of the 5-A process in which the body cover 2 is manufactured is obtained. The result of the 5-A process is combined with the cap 1 prepared in the 4-A process, which is a 5-B process indicating the cap bonding process. The cap 1 is coupled to the other end of the bobbin 3 to protect the side of the bobbin 3 and the side of the body cover 2 from moisture or dust.

After the 5-B process is completed, second measurement is again performed and visual inspection is performed. Good products passed by the appearance inspection is shipped through a washing and packaging process.

As a result, according to the cylindrical antenna structure manufactured through FIGS. 4 and 5, there is no need to separately process the feed connector and the spring, which have to be prepared in the past, there is no need for spring winding and soldering operations, and the variation of electrical characteristics can be reduced. Can reduce the cost of quality inspection and production control, and reduce the burden of limiting the small size and light weight. In addition, although the direct molding process 4-C has been described as insert injection in the embodiments of FIGS. 4 and 5, the above-described method may be used in a conventional injection processing method without inserting an insulating bobbin 3 when the case is permitted. The integral conductive antenna section 4 can be manufactured directly.

6 and 7 are detailed views of a direct molding antenna applicable to cellular and PCS communication systems, respectively. Referring to FIG. 6, antenna processing dimensions applicable to a cellular wireless communication system operating at a frequency of about 800 MHz are shown. The cap 1, the body cover 2, the bobbin 3, and the integral conductive antenna part 4 may each be formed of a material of ABS, urethane, elastomer, and conductive resin. On the other hand, referring to Figure 7, the antenna processing dimensions applicable to the PCS wireless communication system operating at a frequency of about 1.8 GHz is shown. The number of turns of the cylindrical antenna formed by direct molding in the receiving groove of the bobbin 3 is relatively small, and the diameter of the cap 1, the body cover 2, the bobbin 3, and the integral conductive antenna portion 4 is reduced. It can be seen that the length sizes are the same.

8 and 9 are detailed views of a rod antenna coupled direct molding antenna applicable to cellular and PCS communication systems, respectively, and include a cylindrical body including a body cover 2, a bobbin 3, and an integral conductive antenna section 4; The antenna, the cap 1, the needle 5, the titanium core wire 6, the tube 7 and the stopper 8 correspond to the above-described load wire antenna. The cap 1 is used as a handle when the inner diameter is coupled to the outer diameter of the whip 5 except for the fixed antenna that is not coupled to the rod wire antenna, when the rod wire antenna is extended and stored. When employed in a cordless telephone of a PCS communication system, the antenna operates at a frequency of 1.85 to 1.99 GHz, and when employed in a cellular communication system the planar antenna is designed to operate at a frequency of 824 to 894 MHz.

10 and 11 show stage pattern antennas and substrate printed type antennas known in the art, respectively, and are diagrams for explaining an extended application of a direct molding antenna according to the present invention. The stage pattern antenna 9 shown in FIG. 10 is a unit connection alternately connecting one end of the first and second unit lines P2 and P6 parallel to each other along a circumference and the first and second unit lines P2 and P6. It is realized by the repetitive formation of the unit pattern portion formed by the line P4. In this case, if the receiving groove 3C of the bobbin 3 shown in FIG. 4 is formed in a stage pattern, the antenna having the stage pattern, rather than the helical type antenna, can be manufactured integrally with the feed connector.

Referring to FIG. 11, an electrically insulating planar substrate 10, a conductive first radiating element 20 formed in a non-linear pattern on a first surface of the substrate 10, and a first surface of the substrate. A conductive second radiating element 30 formed in a straight pattern on the opposite second surface is shown. The first and second radiating elements 20 and 30 formed opposite to the substrate 10 are planar antenna units that operate as one antenna resonating in a multiple frequency band. The power supply connector 40 accommodates one end of the planar antenna unit through an internal groove, and functions to electrically connect one end of the first radiating element 20 to a transceiver of the portable wireless telephone. The body cover 50 serves to surround the planar antenna part connected to the power supply connector 40 and is formed of a resin-based material such as urethane. Here, the substrate 10 is made of an insulating material or substrate, such as a printed circuit board (PCB) or a flexible material. Although it is shown in the figure that the substrate 10 is separated from the body substrate of the portable radiotelephone and extends outside of the telephone housing (or case), a part of the internal body substrate is installed when installed inside the telephone. You can use it. That is, the planar antenna unit may function as a built-in type built in the portable radiotelephone or an external type antenna protruding to the outside. The antenna may be mounted behind or adjacent to other elements such as support posts, input / output circuits, keypads, etc. when installed inside without utilizing the internal body substrate of the phone.

Similarly, in the case of FIG. 11, the feed connector 40 and the first and second radiating elements 20 and 30 may be manufactured integrally by direct injection molding to insert and perform only the substrate.

On the other hand, for aesthetics of the antenna, of course, it is possible to have a light emitting diode lighting function. In such a case, by connecting the positive terminal and the negative terminal of the light emitting diode, respectively, it is possible to cause the light of the color set when a call is made, when a call is made, or during a telephone call to be emitted from the light emitting diode. As a result, the present invention can be variously used in PCS, cellular, GSM, IMT-2000, PDA, and GPS communication schemes, and can be installed in the outer housing of the radiotelephone in a small area or employed therein.

12 and 13 show simulation graphs of antenna characteristics according to the direct molding antenna of the present invention. 12 is a simulation graph showing voltage standing wave characteristics, in which VSWR is coordinated along the "Y" axis, and frequency is coordinated along the "X" axis. 13 is a chart showing electrical characteristics at the center frequency 859 MHz.

According to the above drawings and test measurement results not shown, it was confirmed that an appropriate omni-directional radiation pattern was obtained without deteriorating electrical characteristics as compared with a conventional antenna. This facilitates communication with another radiotelephone or base station, hub, or satellite that may be located away from the radiotelephone. The antenna can be applied to wireless terminal phones of GSM, IMT-2000, and GPS communications in addition to PCS and cellular.

In the above description, the embodiments of the present invention have been described with reference to the drawings, for example. However, it will be apparent to those skilled in the art that the present invention may be variously modified or changed within the scope of the technical idea of the present invention. .

According to the antenna structure and manufacture of the present invention as described above, while maintaining the electrical characteristics of the antenna, there is no need to separately process the feed connector and the spring, there is no need for spring winding and soldering operation, and to reduce the deviation of the electrical characteristics It is possible to reduce the cost of quality inspection and production control, and there is an effect that the restriction on the light weight is reduced.

1 is a view showing an example of the antenna structure of a conventional portable radiotelephone

2 and 3 are diagrams for explaining the manufacturing process of the conventional helical antenna

4 and 5 are views for explaining the manufacturing process of the direct molding antenna according to an embodiment of the present invention

6 and 7 are detailed views of a direct molding antenna applicable to cellular and PCS communication systems, respectively.

8 and 9 are detailed views of a load antenna coupled direct molding antenna applicable to cellular and PCS communication systems, respectively.

10 and 11 respectively show stage pattern antennas and substrate printed type antennas known in the art, and are shown to illustrate the extended application of a direct molding antenna in accordance with the present invention.

12 and 13 are graphs simulating the antenna characteristics according to the direct molding antenna of the present invention

Claims (10)

In the antenna structure of a wireless communication device: An electrically insulating bobbin in which a receiving groove of a predetermined shape is formed on the circumferential surface; An integrally conductive antenna portion extending from one end of the bobbin and one end of the bobbin to be injection molded from a conductive material together to perform a function of a cylindrical antenna and a feed connector at the same time; And an insulating body cover covering an outer portion of the bobbin and an outer portion of the integrated conductive antenna unit. The antenna structure of claim 1, wherein the conductive material of the integrated conductive antenna unit is an injection molding material reinforced with carbon fiber based on polybutylene terephthalate resin. The conductive material of claim 1, wherein the conductive material of the integrated conductive antenna unit is one selected from PX series, PS series, PL series, CP series, PO series, MX series, PN series, SU series, or PA series of LUCON. Antenna structure of a wireless communication device, characterized in that. The antenna structure of claim 1, wherein the conductive material of the integrated conductive antenna unit is a cool polymer composite material. The antenna structure of claim 1, further comprising a cap coupled to the other end of the bobbin to protect a side surface of the bobbin and a side surface of the body cover. The wireless communication apparatus of claim 1, wherein the cylindrical antenna includes a cylindrical shape of a helical shape or a stage type, and when the one of the shapes is selected, the receiving groove has a groove structure corresponding to the selected shape. Antenna structure. In the antenna assembly structure of a wireless communication device: An electrically insulating bobbin in which a receiving groove of a predetermined shape is formed on the circumferential surface; An integrally conductive antenna portion extending from one end of the bobbin and one end of the bobbin to be injection molded from a conductive material together to perform a function of a cylindrical antenna and a feed connector at the same time; An insulating body cover covering an outer portion of the bobbin and an outer portion of the integrated conductive antenna portion; And a load wire antenna extending and received with respect to the device through an inner diameter of the bobbin and an inner diameter of the integral conductive antenna portion. In the antenna assembly structure of a wireless communication device: An electrically insulating flat type substrate mounted inside the apparatus, the receiving groove having a predetermined shape in a plane; An integrally conductive antenna portion extending from one end of the receiving groove formed in the substrate to an end portion of the substrate and injection molded together with a conductive material to simultaneously perform the functions of the cylindrical antenna and the feeding connector; And an insulating body cover covering an outer portion of the substrate and an outer portion of the integrated conductive antenna portion. In a method of manufacturing a cylindrical antenna of a wireless communication device: A first step of preparing an electrically insulating bobbin having a receiving groove having a predetermined shape formed on a circumferential surface thereof; Forming a conductive groove portion formed in the bobbin and the portion of the bobbin extending to one end of the bobbin and formed of a conductive material together to perform the functions of the cylindrical antenna and the feed connector at the same time to insert injection molding process A second process; And a third process of forming an insulating body cover covering an outer portion of the bobbin and an outer portion of the integrated conductive antenna unit by an injection molding process. The wireless communication apparatus of claim 9, wherein the cylindrical antenna includes a cylindrical shape of a helical shape or a stage type, and when the one of the shapes is selected, the receiving groove has a groove structure corresponding to the selected shape. Method of manufacturing a cylindrical antenna.