WO2009022767A1

WO2009022767A1 - An antenna integrated on a circuit board

Info

Publication number: WO2009022767A1
Application number: PCT/KR2007/006480
Authority: WO
Inventors: Jae-Hoon Chio; Seung-Gil Jeon; Dong-Hyun Seo
Original assignee: Industry University Cooperation Foundation IUCF HYU; Industry University Cooperation Foundation of Sogang University
Current assignee: Industry University Cooperation Foundation IUCF HYU; Industry University Cooperation Foundation of Sogang University
Priority date: 2007-08-10
Filing date: 2007-12-12
Publication date: 2009-02-19
Anticipated expiration: 2010-02-10
Also published as: KR100901819B1; KR20090016358A

Abstract

An antenna integrated on a circuit board is disclosed. The antenna includes a ground plate disposed on at least one of an upper side and a lower side of a substrate, and configured to have a certain dielectric constant, a feeding line disposed on at least one of a first plane corresponding to the ground plate and a second plane opposed to the ground plate on the substrate, and a radiation member connected to one terminal of the feeding line, and formed on a given area of the substrate through a patterning method to transmit/receive the RF signal. That is, since the antenna is integrated on the circuit board, the size of the antenna is reduced. In addition, the antenna includes at least two radiation members, and so a wideband characteristic may be obtained.

Description

AN ANTENNA INTEGRATED ON A CIRCUIT BOARD

[Technical Field]

Example embodiment of the present invention relates to an antenna integrated on a circuit board, more particularly relates to an antenna having small size and assembled easily. [ Background Art]

A Bluetooth is generally used as a communication means for connecting communication devices in a local area instead of fragile and inconvenient wire cable.

This Bluetooth connects a small mobile device such as a portable phone, a PDA, etc. to a laptop, and performs voice communication between the mobile device and the laptop. In addition, the Bluetooth has been widely used in various devices such as the portable phone, a wireless headset, a portable multimedia player PMP, etc.

To mount easily a Bluetooth module on a main board, a RF module, a baseband processor, a flash memory and its surrounding circuit and an antenna, etc are embodied as one small PCB .

In a common technique, an antenna for the Bluetooth module is embodied as an embedded antenna or is established with planar inverted- F antenna PIFA on a PCB so as to transmit a signal processed by the RF module.

Additionally, the antenna is mainly established on the PCB as a chip antenna. However, since the embedded antenna, the PIFA or the chip antenna is embodied as individual chip, cost for a device having the above antenna may be increased. In addition, it is difficult to assemble the device.

Recently, a manufacturer prefers the embedded antenna having small size to an external antenna so as to embody the Bluetooth, and is interested in an element for providing integrally a plurality of functions.

Accordingly, an antenna, for providing multi-function and reducing manufacture cost and assembled easily, has been required.

[ Disclosure] [ Technical Problem]

Accordingly, the present invention is provided to substantially obviate one or more problems due to limitations and disadvantages of the related art.

Example embodiment of the present invention provides an antenna, integrated on a circuit board, for reducing manufacture cost and assembled easily.

Another example embodiment of the present invention provides an antenna integrated on a circuit board, having small size and for adjusting properly frequency shift.

Still another example embodiment of the present invention provides an antenna, integrated on a circuit board, for embodying a wideband through multiple resonances. [ Technical Solution]

An antenna integrated on a circuit board for transmitting/receiving an RF signal according to one example embodiment of the present invention includes a ground plate disposed on at least one of an upper side and a lower side of a substrate, and configured to have a certain dielectric constant; a feeding line disposed on at least one of a first plane corresponding to the ground plate and a second plane opposed to the ground plate on the substrate; and a radiation member connected to one terminal of the feeding line, and formed on a given area of the substrate through a patterning method to transmit/receive the RF signal. The radiation member is a helical element having a first pattern disposed on the first plane, a second pattern disposed on the second plane, and a via hole for connecting the first pattern to the second pattern.

The radiation member includes a first helical element configured to resonate in a first frequency band; and a second helical element configured to resonate in a second frequency band.

The first helical element has a main line included in the first pattern and connected to one terminal of the feeding line and a first subline included in the first pattern and the second pattern and connected to one terminal of the main line, and a second helical element has the main line and a second sub-line included in the first pattern and the second pattern and connected to the other terminal of the main line.

The main line is connected to the first sub-line and the second sub-line included in the second pattern through a via hole.

A winding length of the first helical element is different from that of the second helical element. A winding length of each of the helical elements is adjustable.

The antenna further includes a ground pin configured to connect the radiation member to the ground plate.

The antenna further includes a ground pin disposed on a plane 85 opposed to the main line, wherein one terminal of the ground pin is connected to the ground plate, and the other terminal of the ground pin is connected to a via hole extended vertical from the main line.

The feeding line is separately disposed from the ground plate on the first plane through the patterning method.

90 The feeding line includes a feeding member connected to a coaxial cable and an impedance matching member for matching impedance between the coaxial cable and the radiation member.

An antenna integrated on a circuit board for transmitting/receiving an RF signal according to another example embodiment of the present 95 invention includes a ground plate disposed on at least one of an upper side and a lower side of a substrate, and configured to have a certain dielectric constant; a feeding line separated from the ground plate by a given distance; a radiation member connected to one terminal of the feeding line, and configured to transmit/receive the RF signal and a

100 ground pin configured to connect the radiation member to the ground plate.

The feeding line is disposed on at least one of a first plane corresponding to the ground plate and a second plane opposed to the ground plate through a patterning method, and the radiation member is

105 separated from the ground plate and formed on a given area of the substrate through the patterning method.

The radiation member includes a first helical element disposed on one side of the substrate, and configured to resonate in a first frequency band; and a second helical element disposed on one side of the substrate, 110 and configured to resonate in a second frequency band, and wherein the first helical element has a main line connected to one terminal of the feeding line and a first sub-line connected to one terminal of the main line, and a second helical element has the main line and a second subline connected to the other terminal of the main line.

115 One terminal of the ground pin is connected to the ground plate on a plane opposed to the main line, and the other terminal of the ground pin is connected to a via hole extended vertical from the main line. The RF signal is a signal for a Bluetooth band. An antenna integrated on a circuit board for transmitting/receiving

120 an RF signal according to still another example embodiment of the present invention includes a ground plate disposed on at least one of an upper side and a lower side of a substrate, and configured to have a certain dielectric constant; and a radiation member having at least one helical element disposed separately from the ground plate and formed on 125 an upper side and a lower side of the substrate through a patterning method. [ Advantageous Effects]

An antenna according to one example embodiment of the present invention is integrated on a circuit board, and so size the antenna and 130 manufacture cost may be reduced.

In addition, since the antenna according to the present invention has at least two helical elements, and thus a wideband may be embodied through multiple resonances in accordance with the helical elements.

[ Description of Drawings]

135 Example embodiments of the present invention will become more apparent by describing in detail example embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a front view illustrating an antenna integrated on a circuit board according to one example embodiment of the present 140 invention; FIG. 2 is a side view illustrating the antenna integrated on the circuit board according to one example embodiment of the present Invention;

FIG. 3 is a front view illustrating an antenna integrated on a 145 circuit board having a helical element according to one example embodiment of the present invention;

FIG. 4 is a view illustrating a backside of an antenna integrated on a circuit board having a helical element according to one example embodiment of the present invention;

150 FIG. 5 is a view illustrating a top metal layer of a helical element according to one example embodiment of the present invention;

FIG. 6 is a view illustrating a bottom metal layer of a helical element according to one example embodiment of the present invention;

FIG. 7 is a view illustrating measure result of reflectivity of the 155 antenna integrated on the circuit board according to one example embodiment of the present invention; and

FIG. 8 is a view illustrating a radiation pattern of the antenna integrated on the circuit board according to one example embodiment of the present invention. 160 [ Mode for Invention ] Example embodiments of the present invention are disclosed herein.

However, specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments

165 of the present invention, however, example embodiments of the present invention may be embodied in many alternate forms and should not be construed as limited to example embodiments of the present invention set forth herein.

Accordingly, while the invention is susceptible to various

170 modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the invention to the particular forms disclosed, but on the contrary, the invention is to cover all modifications, equivalents, and alternatives

175 falling within the spirit and scope of the invention. Like numbers refer to like elements throughout the description of the figures.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish

180 one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

185 It will be understood that when an element is referred to as being

"connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening

190 elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (i.e., "between" versus "directly between", "adj acent" versus "directly adj acent", etc.).

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the

195 invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising, ", "includes" and/or "including", when used herein, specify the presence of stated features, integers, steps, operations,

200 elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly

205 understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless

210 expressly so defined herein.

An antenna of the present invention is integrated on a circuit board, and transmits/receives a RF signal. The antenna may be used for transmitting/receiving a Bluetooth signal as a high frequency band signal. 215 In following description, the antenna integrated on the circuit board is used for transmitting/receiving the Bluetooth signal. However, the antenna is not limited in the description, and may be used for transmitting/receiving other RF signal.

FIG. 1 is a front view illustrating an antenna integrated on a

220 circuit board according to one example embodiment of the present invention. FIG. 2 is a side view illustrating the antenna integrated on the circuit board according to one example embodiment of the present invention.

In FIG. 1 and FIG. 2, the antenna of the present embodiment 225 includes a substrate 10, a ground plate 11 , a feeding line 12 and a radiation member 13.

The substrate 10 has certain dielectric constant, and corresponds to a medium for a RF signal. For example, the substrate 10 of the present embodiment may be a FR-4 substrate employed universally in a wireless 230 headset for a Bluetooth. In addition, the substrate 10 has small size, and may have for example a length L of about 30 mm, a width W of approximately 35 mm and a height H of about 1.6 mm. Furthermore, the dielectric constant (βr) of the substrate 10 may be 4.

In one example embodiment of the present invention, the ground 235 plate 1 1 is formed on at least one of an upper side and a lower side of the substrate 10.

As shown in FIG. 2, the ground plate 11 of the present embodiment may be formed on specific area of the upper side and the lower side of the substrate 10. It is desirable that the ground plate 11 is separated by

240 given distance from the feeding line 12 and the radiation member 13. The feeding line 12 is a transmission line for an RF signal outputted to the radiation member 13 or an RF signal provided from the radiation member 13, and is extended from a coaxial cable 14 to the radiation member 13. Particularly, the feeding line 12 includes a feeding member 15 and an impedance matching member 16 (stub) for matching impedance between the coaxial cable 14 of 50Ωand the radiation member 13 , wherein the feeding member 15 is connected to the coaxial cable 14.

In one example embodiment of the present invention, the impedance matching member 16 is located to a front end of the feeding member 15 so that input impedance is easily adjusted. Here, the impedance may be matched by adjusting a width of the feeding line 12, a distance between the feeding line 12 and the ground plate 1 1 , a size of the impedance matching member 16, etc.

In one example embodiment of the present invention, the feeding line 12 may be formed on at least one of a plane corresponding to the ground plate 1 1 and a plane opposed to the ground plate 1 1 on the basis of the substrate 10. Here, the feeding line 12 may be integrally formed on the substrate 10 through a patterning method such as an etching or a printing method. It is desirable to dispose the feeding line 12 on the plane corresponding to the ground plate 1 1 , thereby forming a co-planar waveguide CPW.

The radiation member 13 according to the present invention is connected to the feeding line 12, and may be integrally formed on the 265 substrate 10 through the patterning method, etc. Here, the patterning method includes every method, of forming integrally the radiation member 13 on the substrate 10, such as the etching method or the printing method, etc.

The radiation member 13 may have a top metal layer, i.e. first

270 pattern disposed on the upper side of the substrate 10 and a bottom metal layer, i.e. second pattern disposed on the lower side of the substrate 10 as shown in FIG. 2. Here, the top metal layer and the bottom metal layer may be connected through a via hole 17.

In one example embodiment of the present invention, the radiation 275 member 13 may be made up of helical elements. This will be described in detail with reference to accompanying drawings FIG. 3 to FIG. 6.

FIG. 3 is a front view illustrating an antenna integrated on a circuit board having a helical element according to one example embodiment of the present invention. FIG. 4 is a view illustrating a

280 backside of an antenna integrated on a circuit board having a helical element according to one example embodiment of the present invention. FIG. 5 is a view illustrating a top metal layer of a helical element according to one example embodiment of the present invention. FIG. 6 is a view illustrating a bottom metal layer of a helical element according to 285 one example embodiment of the present invention.

As shown in FIG. 3 to FIG. 6, the radiation member 13 may be a helical element 30 formed with spiral shape on the substrate 10.

Generally, a radiation element (hereinafter, referred to as

"element") is formed with spiral shape in a helical antenna. This helical

290 antenna is divided into two types in accordance with structure of a spiral.

In a first helical antenna as an axis-type mode, a length of the spiral wound by one time has approximately one wavelength, and a length of a pitch has about one Nth of the wavelength, wherein the N is an integer of above 2. In addition, maximum radiation direction is a 295 direction of the axis. The first helical antenna is used for a satellite communication, etc. because a circularly polarized wave is transmitted/received through the first helical antenna.

In a second helical antenna having a radiation element as a normal mode, a length of a pitch of the spirals has approximately half

300 wavelength so that a length of the spiral wound by one time has two times wavelength or three times wavelength. In this case, current distribution of the spiral has the same phase at each of turning points of the spirals. In addition, since electric fields outputted from the spirals separated by half wavelength are synthesized, a horizontal polarized

305 wave is omnidirectionally radiated by adjusting a directivity of a vertical side. This second helical antenna is widely used as an antenna for television broadcasting in an ultra high frequency UHF band and an antenna for a mobile base station.

In the antenna of the present invention, the helical element having

310 spiral shape is integrated on the circuit board.

The helical element 30 of the present invention includes a first pattern 31 disposed on the upper side of the substrate 10 and a second pattern 32 disposed on the lower side of the substrate 10. Here, the patterns 3 1 and 32 are formed through a patterning method, and are

315 electrically connected through via holes 17. Additionally, the via holes 17 connect vertically the first pattern 31 to the second pattern 32 through the substrate 10, and so a transmission line for a RF signal formed by the patterns 31 and 32 has spiral shape.

In one example embodiment of the present invention, the antenna

320 may have at least two helical elements so as to transmit/receive a signal of a wideband. In this case, the antenna may obtain the wideband by using a multi band method in accordance with the helical elements.

A microstrip patch antenna is usually used for embodying the multi band during last decades. However, a problem exists in that the 325 microstrip patch antenna has narrow bandwidth. To solve this problem, following method is mainly used.

A first method uses a tuning stub and a reactive load, and is a most common method for increasing a bandwidth of the microstrip patch antenna. This first method enhances the bandwidth or embodies a multi

330 resonance characteristic through the antenna having the reactance load such as a length adjusting short circuit coaxial stub, a short pin, etc.

A second method uses a laminated structure. In an antenna in accordance with the second method, at least two patches are vertically disposed on layers, respectively. In addition, size of the patch and a 335 height between adjacent patches are properly adjusted. In this case, a multi band characteristic is embodied through resonances by the patches and combination between the patches.

A third method uses an U-slot, and forms the U-slot in a microstrip antenna. Here, since the antenna uses a resonance characteristic in

340 accordance with current distribution of the U-slot and a resonance characteristic of a patch, the antenna may embody a multi band on one substrate.

A fourth method uses a slot combination structure. Various methods such as a microstrip, a probe, and a slot combination, etc. are

345 used as a feeding structure of a microstrip antenna. Here, an antenna in accordance with the slot combination method obtains a multi band characteristic of about 10-20% through a characteristic of the slot combination method. However, it is difficult to manufacture the laminated structure for the multi band. To solve this problem, an antenna

350 for a multi band is set to have fourth slots next to edges of a patch.

A fifth method uses a dual polarized wave, and embodies a multi band antenna through the dual polarized wave in accordance with dual feeding. Here, performance of the antenna depends on isolation between two feeding lines.

355 Anther method uses a notch structure, particularly obtains a multi band characteristic by forming the notch structure next to a feeding line. Here, a length and a width of a notch determine the multi band. Still another method uses a fractal typed antenna. This antenna obtains the multi band by using a multi resonance characteristic and a

360 minimization characteristic, wherein the multi resonance characteristic is generated by repetitive magnetic structure.

The antenna of the present embodiment has at least two helical elements 30 integrated on the circuit board so as to obtain the multi band. As shown in FIG. 3 to FIG. 6, in case that the antenna has two helical elements 30, the helical element 30 includes a first helical element 40 for a first frequency band and a second helical element 41 for a second frequency band.

The first helical element 40 has a main line 42 and a first sub-line

43 connected to one terminal of the main line 42 and formed on the upper side and the lower side of the substrate 10. Here, the main line 42 is included in the first pattern 31. In addition, the main line 42 and the first sub-line 43, disposed on the upper side of the substrate 10, included in the first pattern 31 are connected to the first sub-line 43, disposed on the lower side of the substrate 10, included in the second pattern 32 through the via hole 17.

The second helical element 41 is connected to the main line 42 and the other terminal of the main line 42, and has a second sub-line 44 formed on the upper side and the lower side of the substrate 10. Here, the main line 42 and the second sub-line 43, disposed on the upper side of the substrate 10 are connected to the second sub-line 44, disposed on the lower side of the substrate 10 through the via hole 17.

Preferably, the first helical element 40 may resonate in a frequency band of about 2.45GHz to about 2.5GHz of a Bluetooth band, and the second helical element 41 may resonate in a frequency band of 385 about 2.4GHzto about 2.45GHz.

A resonance frequency is determined in accordance with a length

(winding length) of the helical elements 40 and 41. That is, the resonance frequency of each helical element 40 and 41 may be adjusted by controlling the winding length of the helical elements 40 and 41 , i.e. sum

390 of a length of the main line and a length of the sub-line.

To embody the resonance frequency, a length La and a width Wa of an area corresponding to the radiation member 13 may have respectively 12 mm and 5mm in case that the substrate 10 has a size of 12 mm x 5 mm x 1.6 mm. Additionally, a length L l of the main line 42 may have 8 mm, 395 and a length L2 of the sub-line 43 disposed on the upper side of the substrate 10 may have 3 mm. Furthermore, a width Wl of each sub-line 43 and 44 and a space W2 of the sub-lines 43 or 44 may have 0.5 mm, respectively.

On the other hand, the radiation member 13 of the present 00 invention has short length. In this case, desired resonance may not be generated because a capacitance of the antenna is increased.

Accordingly, a ground pin 45 connected to the ground plate 1 1 is provided to the radiation member 13 of the present embodiment. Preferably, the ground pin 45 is provided on a part corresponding to the 405 main line 42 of the lower side of the substrate 10. Here, one terminal of the ground pin 45 is connected to the ground plate 1 1 , and the other terminal of the ground pin 45 is connected to the via hole 17 extended vertically from the main line 42.

This ground pin 45 increases an inductance of the antenna, and so 410 desired resonance may be obtained though the radiation member 13 has short length.

FIG. 7 is a view illustrating measure result of reflectivity of the antenna integrated on the circuit board according to one example embodiment of the present invention.

415 Referring to FIG. 7, it is verified that the antenna has a voltage standing wave ratio VSWR 2 : 1 and a bandwidth of 2390 MHz to 2540 MHz, i.e. the antenna provides the Bluetooth band.

FIG. 8 is a view illustrating a radiation pattern of the antenna integrated on the circuit board according to one example embodiment of

420 the present invention. Referring to FIG. 8, the antenna of the present invention has good gain of above OdBi. In addition, it is verified that the antenna has the radiation pattern proper to a headset for the Bluetooth.

Any reference in this specification to "one embodiment," "an

425 embodiment," "example embodiment, "etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a

430 particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to affect such feature, structure, or characteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a

435 number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of

440 the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.

445

450

455

460

Claims

[ CLAIMS ] [ Claim 1 ]

An antenna integrated on a circuit board for transmitting/receiving an RF signal, the antenna comprising:

465 a ground plate disposed on at least one of an upper side and a lower side of a substrate, and configured to have a certain dielectric constant; a feeding line disposed on at least one of a first plane corresponding to the ground plate and a second plane opposed to the 470 ground plate on the substrate; and a radiation member connected to one terminal of thefeeding line, and formed on a given area of the substrate through a patterning method to transmit/receive the RF signal.

[ Claim 2 ]

475 The antenna of claim 1 , wherein the radiation member is a helical element having a first pattern disposed on the first plane, a second pattern disposed on the second plane, and a via hole for connecting the first pattern to the second pattern. [ Claim 3 ]

480 The antenna of claim 1 , wherein the radiation member includes : a first helical element configured to resonate in a first frequency band; and a second helical element configured to resonate in a second frequency band. 485 [ Claim 4 ]

The antenna of claim 3 , wherein the first helical element has a main line included in the first pattern and connected to one terminal of the feeding line and a first sub-line included in the first pattern and the second pattern and connected to one terminal of the main line, and 490 a second helical element has the main line and a second sub-line included in the first pattern and the second pattern and connected to the other terminal of the main line. [ Claim 5 ]

The antenna of claim 4, wherein the main line is connected to the 495 first sub-line and the second sub-line included in the second pattern through a via hole. [ Claim 6 ]

The antenna of claim 3 , wherein a winding length of the first helical element is different from that of the second helical element.

500 [ Claim 7 ] The antenna of claim 3 , wherein a winding length of each of the helical elements is adjustable. [ Claim 8 ]

The antenna of claim 1 , further comprising:

505 a ground pin configured to connect the radiation member to the ground plate. [ Claim 9 ]

The antenna of claim 4, further comprising: a ground pin disposed on a plane opposed to the main line, 510 wherein one terminal of the ground pin is connected to the ground plate, and the other terminal of the ground pin is connected to a via hole extended vertical from the main line. [ Claim 10 ]

The antenna of claim 1 , wherein the feeding line is separately 515 disposed from the ground plate on the first plane through the patterning method. [ Claim 1 1 ]

The antenna of claim 1 , wherein the feeding line includes a feeding member connected to a coaxial cable and an impedance matching

520 member for matching impedance between the coaxial cable and the radiation member. [ Claim 12 ]

525 a ground plate disposed on at least one of an upper side and a lower side of a substrate, and configured to have a certain dielectric constant; a feeding line separated from the ground plate by a given distance a radiation member connected to one terminal of the feeding line, 530 and configured to transmit/receive the RF signal and a ground pin configured to connect the radiation member to the ground plate. [ Claim 13 ]

The antenna of claim 12, wherein the feeding line is disposed on at 535 least one of a first plane corresponding to the ground plate and a second plane opposed to the ground plate through a patterning method, and the radiation member is separated from the ground plate and formed on a given area of the substrate through the patterning method. [ Claim 14 ]

540 The antenna of claim 13 , wherein the radiation member includes : a first helical element disposed on one side of the substrate, and configured to resonate in a first frequency band; and a second helical element disposed on one side of the substrate, and configured to resonate in a second frequency band, and

545 wherein the first helical element has a main line connected to one terminal of the feeding line and a first sub-line connected to one terminal of the main line, and a second helical element has the main line and a second sub-line connected to the other terminal of the main line. 550 [ Claim 15 ]

The antenna of claim 14, wherein one terminal of the ground pin is connected to the ground plate on a plane opposed to the main line, and the other terminal of the ground pin is connected to a via hole extended vertical from the main line. 555 [ Claim 16 ]

The antenna of one selected from a group including claim 1 to claim 12, wherein the RF signal is a signal for a Bluetooth band. [ Claim 17 ]

An antenna integrated on a circuit board for transmitting/receiving

560 an RF signal, the antenna comprising: a ground plate disposed on at least one of an upper side and a lower side of a substrate, and configured to have a certain dielectric constant; and a radiation member having at least one helical element disposed separately from the ground plate and formed on an upper side and a lower side of the substrate through a patterning method.