WO2010018897A1

WO2010018897A1 - Phase shifter for blocking a fringing field and antenna having the same

Info

Publication number: WO2010018897A1
Application number: PCT/KR2008/007253
Authority: WO
Inventors: Phil-Soo Shin; Seung-Chul Lee; Hyung-Joon Noh; Anders Ek; Henrik Jidhage
Original assignee: Ace Antenna Corp.
Priority date: 2008-08-11
Filing date: 2008-12-08
Publication date: 2010-02-18
Also published as: KR101027920B1; KR20100019790A

Abstract

A phase shifter for blocking a fringing field to enhance performance (loss, etc) of an antenna is disclosed. The phase shifter includes a first substrate having a certain dielectric constant, a first line disposed, in a specific direction on the basis of a center of the first substrate, on the first substrate, and configured to be a conductor, and a first ground line disposed outside of the first line on the basis of the center of the first substrate to block a fringing field, and configured to be a conductor.

Description

PHASE SHIFTER FOR BLOCKING A FRINGING FIELD AND ANTENNA

HAVING THE SAME

[ Technical Field] Example embodiment of the present invention relates to a phase shifter and an antenna having the same, more particularly relates to a phase shifter for blocking a fringing field and an antenna having the same. [Background Art]

A phase shifter is connected to radiation elements, and changes phase of a RF signal transmitted to the radiation elements. This phase shifter has generally the structure shown in below FIG. 1.

FIG. 1 is a view illustrating a common phase shifter. In FIG. 1, the phase shifter includes a dielectric substrate 100, a first line 102, a second line 104, a third line 106, a rotation axis 110 and an arm member 112.

A RF signal inputted to the third line 106 is divided into the first line 102 and the second line 104 at the rotation axis 110.

The RF signal divided into the first line 102 is transmitted through a first dielectric layer located between a ground plate (not shown) and a major axis line of the dielectric substrate 100, the ground plate being formed on a lower side of the dielectric substrate 100 and the major axis line being formed on a lower side of the arm member 112. Subsequently, the transmitted RF signal is coupled between an end portion of the major axis line and the first line 102, and then is transmitted to a corresponding radiation element.

The RF signal divided into the second line 104 is transmitted through a second dielectric layer located between the ground plate and a minor axis line of the substrate 100, the minor axis line being formed on a lower side of the arm member 112. Subsequently, the transmitted RF signal is coupled between an end portion of the minor axis line and the second line 104, and then is transmitted to a corresponding radiation element. As a result, a certain radiation pattern is outputted from the radiation elements.

In the above process of delivering the RF signal, a fringing field 120 may be generated from the lines 102 and 104 as shown in FIG. 1. The fringing field 120 may affect other elements of an antenna except the phase shifter, and so the performance of the antenna may be lowered.

The above information disclosed in this Background Art section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. [ 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 a phase shifter for enhancing performance (loss, etc) of an antenna by blocking a fringing field and the antenna having the phase shifter. [Technical Solution]

A phase shifter according to one example embodiment of the present invention includes a first substrate having a certain dielectric constant; a first line disposed, in a specific direction on the basis of a center of the first substrate, on the first substrate, and configured to be a conductor; and a first ground line disposed outside of the first line on the basis of the center of the first substrate to block a fringing field, and configured to be a conductor. The first ground line is coupled to a ground.

The phase shifter further includes a ground plate disposed on a second surface opposed to a first surface, on which the first line is disposed, of the first substrate or disposed inside of the first substrate, wherein the first ground line is electrically connected to the ground plate through at least one via hole. The phase shifter further includes a second line disposed in a direction opposed to the first line on the basis of the center of the first substrate; and a second ground line disposed outside of the second line on the basis of the center of the first substrate. Here, the second ground line is coupled to a ground.

The phase shifter further includes a second line disposed between the center of the first substrate and the first line on the first substrate, and configured to be a conductor.

The phase shifter further includes a second substrate disposed in parallel to the first substrate; and a second line disposed to a location corresponding to the first line on the second substrate. Here, the second substrate is located between a reflection plate and the first substrate.

The phase shifter further includes a second ground line disposed outside of the second line on the basis of a center of the second substrate. At least one ground member is disposed, with rod shape, outside of the first substrate to block the fringing field outputted from the first substrate, and is extended from a reflection plate in a direction vertical to the reflection plate.

A phase shifter according to another example embodiment of the present invention includes a first substrate having a certain dielectric constant; a first line disposed, in a given direction on the basis of a center of the first substrate, on the first substrate, and configured to be a conductor; and a first ground disposed outside of the first line on the basis of the center of the first substrate.

85 The phase shifter further includes a second substrate disposed in parallel to the first substrate. Here, a second line is disposed to a location corresponding to the first line on the second substrate.

The phase shifter further includes a second ground disposed outside of the second line on the second substrate.

90 An antenna according to one example embodiment of the present invention includes a reflection plate; a phase shifter disposed over the reflection plate, and configured to have a first substrate, wherein a first line as a conductor is disposed on the first substrate; and at least one ground member longitudinal-extended from the reflection plate in a direction

95 crossing over the reflection plate, and disposed outside of the first substrate.

Here, the ground member blocks a fringing field outputted from the first line.

The antenna further includes a second substrate disposed between the reflection plate and the first substrate. Here, the ground member is disposed outside of the second substrate, and a second line as a conductor is

100 disposed on the second substrate. A ground line is disposed outside of the first line on the first substrate or is disposed outside of the second line on the second substrate. [ Advantageous Effects]

A phase shifter and an antenna having the same according to one 105 example embodiment of the present invention block a fringing field by using a ground line formed on an external area of a conduction line, and so loss, etc. of the antenna may be reduced. As a result, performance of the antenna may be enhanced.

In a phase shifter and an antenna having the same according to 110 another example embodiment of the present invention, a ground member connected electrically to a reflection plate is located outside of the phase shifter, and so a fringing field generated from the phase shifter may be blocked by the ground member. Accordingly, loss, etc. of the antenna may be reduced. 115 [Description of Drawings]

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 view illustrating a common phase shifter;

120 FIG. 2 is a view illustrating an antenna according to one example embodiment of the present invention;

FIG. 3 is a view illustrating a phase shifter according to a first example embodiment of the present invention;

FIG. 4 is a perspective view illustrating schematically a phase shifter 125 according to a second example embodiment of the present invention;

FIG. 5 is a view illustrating loss of a phase shifter which does not have a ground plate;

FIG. 6 is a view illustrating loss of a phase shifter having a ground plate according to one example embodiment of the present invention; 130 FIG. 7 is a view illustrating a phase shifter according to a third example embodiment of the present invention;

FIG. 8 is a view illustrating a phase shifter according to a fourth example embodiment of the present invention; and

FIG. 9 is a perspective view illustrating schematically a phase shifter 135 according to a fifth example embodiment of the present invention. [ 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 of

140 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

145 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 falling within the

150 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 one

155 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.

160 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 elements

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

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

170 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, elements,

175 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 understood by one

180 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 expressly so defined 185 herein.

FIG. 2 is a view illustrating an antenna according to one example embodiment of the present invention.

In FIG. 2, the antenna of the present embodiment includes a reflection plate 200, a phase shifter 202 and at least one radiation element 204. 190 The reflection plate 200 functions as a ground and a reflector.

The phase shifter 202 is disposed on a first side of the reflection plate 200, and changes phase of a RF signal transmitted to the radiation elements 204.

The radiation element 204 is disposed on a second side opposed to the 195 first side of sides of the reflection plate 200, and outputs a radiation pattern in a certain direction.

Hereinafter, the phase shifter 202 of the present embodiment will be described in detail.

FIG. 3 is a view illustrating a phase shifter according to a first

200 example embodiment of the present invention. In FIG. 3, the phase shifter 202 of the present embodiment controls a direction of a radiation pattern outputted from the radiation elements 204 by changing phase of a RF signal provided to the radiation elements 204, and includes a dielectric substrate 300, a first line 302, a second line 304, a third

205 line 306, a first ground line 308, a second ground line 3 10, a rotation axis 320 and an arm member 322.

The dielectric substrate 300 is made up of dielectric material having a certain dielectric constant. Here, a ground plate, functioning as a ground, is formed on a lower surface of the dielectric substrate 300, which is not

210 shown. In another example embodiment of the present invention, the ground plate may be formed inside of the dielectric substrate 300 without formed on the lower surface of the dielectric substrate 300. That is, location of the ground plate is not limited as long as the ground plate is formed on/in the dielectric substrate 300.

215 The first line 302 as a conductor is disposed on the dielectric substrate 300, a RF signal being inputted to the first line 302. For example, a specific cable is coupled to an end of the first line 302, and a power (RF signal) is provided to the first line 302 through the cable.

The second line 304 as a conductor is disposed with e.g. curve shape,

220 desirably circular arc shape on the dielectric substrate 300. In addition, ends of the second line 304 are electrically connected to corresponding radiation elements as shown in FIG. 2.

The third line 306 as a conductor is disposed with e.g. curve shape, desirably circular arc shape on the dielectric substrate 300. Additionally, 225 ends of the third line 306 are electrically connected to corresponding radiation elements as shown in FIG. 2. Here, arc length of the third line

306 is smaller than that of the second line 304, and thus phase variable range of the RF signal by the third line 306 is narrower than that by the second line

304. 230 The first ground line 308 is a conductor, and is disposed along an arc of the second line 304 as shown in FIG. 3. Here, the first ground line 308 is separated from the second line 304.

The second ground line 310 is a conductor, and is disposed along an arc of the third line 306 as shown in FIG. 3. Here, the second ground line 235 3 10 is separated from the third line 306. Any further description abut the ground lines 308 and 310 will be described below.

The rotation axis 320 rotates the arm member 322. Particularly, an external device (not shown) rotates the rotation axis 320, and the rotation axis 320 delivers a rotatory power in accordance with the rotation to the arm

240 member 322. The arm member 322 includes a major arm member corresponding to the second line 304 and a minor arm member corresponding to the third line

306. Here, a fourth line is formed on a lower surface of the major arm member, and a fifth line is formed on a lower surface of the minor arm

245 member.

The arm member 322 rotates arc range of the line 304 or 306 in accordance with operation of the rotation axis 320. In other words, in case that a user wants to change a direction of a radiation pattern, the user rotates the arm member 322 by rotating the rotation axis 320. As a result, phase of 250 the RF signal provided to the radiation elements 204 is changed, and so a direction of the radiation pattern is changed.

Hereinafter, a process of transmitting the RF signal through the phase shifter 202 will be described in detail.

The RF signal inputted through the first line 302 is divided into the 255 second line 304 and the third line 306 on the basis of the rotation axis 320.

The RF signal provided to the second line 304 is transmitted through a first dielectric layer located between the ground plate and the major axis line of the dielectric substrate 300, and then is coupled between an end portion of the major axis line and the second line 304. Subsequently, the

260 coupled RF signal is provided to corresponding radiation elements. The RF signal provided to the third line 306 is transmitted through a second dielectric layer located between the ground plate and the minor axis line of the dielectric substrate 300, and then is coupled between an end portion of the minor axis line and the third line 306. Subsequently, the

265 coupled RF signal is provided to corresponding radiation elements. As a result, a certain radiation pattern is outputted from the radiation elements 204.

Hereinafter, structure and operation of the ground lines 308 and 310 will be described in detail.

270 Now referring to FIG. 3, the first ground line 308 is disposed outside of the second line 304 on the dielectric substrate 300, preferably is disposed to cover whole arc of the second line 304. In addition, the first ground line 308 is connected to the ground plate through first via holes 3 12, a conductor being formed on an internal side of the first via holes 312.

275 Generally, a fringing field is radiated from the second line 304 when the RF signal is transmitted. The fringing field may affect to other elements of the antenna except the phase shifter 202, e.g. a cable, etc. Hence, it is important to block the fringing field. The phase shifter 202 of the present embodiment blocks the fringing field by using the first ground

280 line 308 so that the fringing field is not radiated to outside of the phase shifter 202. Namely, since the first ground line 308 functions as a ground, the fringing field is not outputted to outside of the phase shifter 202, i.e. is blocked by the first ground line 308.

The second ground line 310 is disposed outside of the third line 306

285 on the dielectric substrate 300, preferably is disposed to cover whole arc of the third line 306. Additionally, the second ground line 310 is coupled to the ground plate through second via holes 314, a conductor being formed on an internal side of the second via holes 314.

The second ground line 310 blocks a fringing field radiated from the 290 third line 306.

In brief, in the phase shifter 202 of the present embodiment, the ground lines 310 and 312 are disposed on external areas of the lines 304 and

306, thereby blocking the fringing field. Accordingly, interference about elements of the antenna by the phase shifter 202, i.e. the fringing field may

295 be reduced.

In above description, the ground lines 310 and 312 are disposed on the external areas of respective lines 304 and 306. However, one ground line may be disposed on the external area of only one line 304 or 306.

Furthermore, the ground lines 308 and 310 are electrically connected

300 to the ground plate through the via holes 312 and 314. However, the ground lines 308 and 3 10 may be coupled to the ground plate through another method.

In another example embodiment of the present invention, the ground lines 308 and 3 10 may be electrically connected to another ground element

305 not the ground plate, e.g. the reflection plate 200. In other words, disposition and connection of the ground lines 308 and 3 10 may be variously modified as long as the ground lines 308 and 3 10 operate as the ground.

FIG. 4 is a perspective view illustrating schematically a phase shifter according to a second example embodiment of the present invention. 310 In FIG. 4, the phase shifter of the present embodiment includes a first dielectric substrate 400, a second dielectric substrate 402, a first line 404, a first ground line 406, a rotation axis 410, a first arm member 412, a second line 420, a second ground line 422 and a second arm member 426. That is, the phase shifter is formed by laminating sub-phase shifters 202 as shown in 315 FIG. 3.

The first line 404 is a conductor, and is disposed on the first dielectric substrate 400.

The first arm member 412 is connected to the rotation axis 410, and rotates in arc range of the first line 404 in response to rotation of the rotation

320 axis 410. The first ground line 406 is disposed on an external area of the first line 404 on the basis of the rotation axis 410, and is connected to for example a first ground plate, formed on a lower surface of the first dielectric substrate 400, through first via holes 408.

325 Generally, in case that the first line 406 does not exist, a fringing field radiated from the first line 404 affects the second line 420 disposed on the second dielectric substrate 402 and elements on a reflection plate. Accordingly, the phase shifter of the present embodiment blocks the fringing field by using the first ground line 406.

330 The second line 420 is a conductor, and is disposed on the second dielectric substrate 402.

The second arm member 426 is connected to the rotation axis 410, and rotates in arc range of the second line 420 in response to rotation of the rotation axis 410.

335 The second ground line 422 is disposed on an external area of the second line 420 on the basis of the rotation axis 410, and is connected to for example a second ground plate, formed on a lower surface of the second dielectric substrate 402, through second via holes 424. As a result, a fringing field radiated from the second line 420 is blocked, i.e. the fringing

340 field is not outputted to outside of the second dielectric substrate 402. . In brief, in the phase shifter of the present embodiment, plural sub- phase shifters are laminated as shown in FIG. 3. In other words, the phase shifter of the present embodiment controls radiation elements more than radiation elements connected electrically to the phase shifter 202 shown in 345 FIG. 3.

In above FIG. 4, two sub-phase shifters are shown. However, three or more sub-phase shifters may be laminated.

Additionally, phase change is controlled by using the rotation axis and the arm member as shown in FIG. 2 and FIG. 3. However, the phase shifter 350 of the present invention may be variously modified as long as the phase shifter uses the ground line to block the fringing field.

Experimental result of the phase shifter, in FIG. 4, using the ground lines 406 and 422 will be described in detail.

FIG. 5 is a view illustrating loss of a phase shifter which does not 355 have a ground plate. FIG. 6 is a view illustrating loss of a phase shifter having a ground plate according to one example embodiment of the present invention. Here, a part (upper part) corresponding to the first dielectric substrate 400 of the phase shifter in FIG. 4 is assumed as a first sub-phase shifter, and a part (lower part) corresponding to the second dielectric

360 substrate 402 is assumed as a second sub-phase shifter. FIG. 5(A) shows loss of the first sub-phase shifter, and FIG. 5(B) illustrates loss of the second sub-phase shifter.

As shown in FIG. 5(A) and FIG. 5(B), it is verified that loss of the second sub-phase shifter is higher than that of the first sub-phase shifter. 365 This is because the loss of the second sub-phase shifter is increased by the fringing field outputted from the first sub-phase shifter.

FIG. 6(A) shows loss of the first sub-phase shifter located in an upper part of the phase shifter of the present invention, and FIG. 6(B) illustrates loss of the second sub-phase shifter located in a lower part of the phase 370 shifter.

Referring to FIG. 6(A), the loss of the first sub-phase shifter is similar to that of the first sub-phase shifter in FIG. 5(A). Whereas, referring to FIG. 6(B), it is verified that loss of the second-phase shifter is considerably reduced compared to the loss of the second sub-phase shifter in FIG. 5(B). 375 That is, since the fringing field is blocked by the ground line 406 disposed on the first dielectric substrate 400, the second sub-phase shifter is little affected by the fringing filed. As a result, the loss of the second sub- phase shifter may be reduced.

FIG. 7 is a view illustrating a phase shifter according to a third

380 example embodiment of the present invention. In FIG. 7, the phase shifter of the present embodiment includes a dielectric substrate 700, a conduction line 702 and a ground line 704. In other words, in the phase shifter unlike in the first example embodiment, the line 702 is formed in only one direction.

385 The ground line 704 is connected to a ground plate through via holes

706 so that a fringing field is blocked.

FIG. 8 is a view illustrating a phase shifter according to a fourth example embodiment of the present invention.

In FIG. 8, the phase shifter of the present embodiment includes a 390 dielectric substrate 800, a first line 802, a second line 804, a ground line 806, a rotation axis 810 and an arm member 812.

That is, the phase shifter includes two conduction lines 802 and 804 like in the first embodiment, and thus the phase shifter operates like in the first embodiment. However, the lines 802 and 804 are disposed in only one 395 direction on the basis of the rotation axis 810 unlike in the first embodiment. Accordingly, a fringing field may be blocked though only one ground line 806 is formed outside of the first line 802 unlike the first embodiment in which two ground lines are formed.

The ground line 806 is electrically connected to a ground plate

400 through via holes 808 so that the fringing field is blocked. FIG. 9 is a perspective view illustrating schematically a phase shifter according to a fifth example embodiment of the present invention.

In FIG. 9, the phase shifter of the present embodiment includes a first dielectric substrate 902, a second dielectric substrate 904, a first line 906, a 405 second line 908 and at least one ground member 910.

Namely, the phase shifter of the present embodiment has plural sub- phase shifters like the phase shifter in the second embodiment. However, in the phase shifter of the present embodiment, a ground line is not formed unlike in the second embodiment. Whereas, the phase shifter of the present 410 embodiment has the ground member 910 functioning as a ground.

The ground member 910 as a conductor is electrically connected to the reflection plate 900, thereby blocking a fringing field radiated from the lines 906 and 908. Preferably, the ground member 910 is disposed to cover arc of the lines 906 and 908.

415 The ground member 910 may have rod shape as shown in FIG. 9, or have curve shape. Namely, disposition and shape of the ground member 910 may be variously modified as long as the ground member 910 blocks the fringing field with located outside of the lines 906 and 908.

In above description, a ground line is not formed to the phase shifter.

420 However, the ground line may be formed outside of the lines 906 and 908. In addition, in a phase shifter having one layer structure not multilayer structure, a ground member connected electrically to the reflection plate may be formed.

In brief, the phase shifter of the present invention blocks the fringing 425 field by using the ground line or the ground member, thereby reducing loss of a power, etc.

Any reference in this specification to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is

430 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 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

435 such feature, structure, or characteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those

440 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 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.

Claims

[ CLAIMS ] [ Claim 1 ] 450 A phase shifter comprising: a first substrate having a certain dielectric constant; a first line disposed, in a specific direction on the basis of a center of the first substrate, on the first substrate, and configured to be a conductor; and

455 a first ground line disposed outside of the first line on the basis of the center of the first substrate to block a fringing field, and configured to be a conductor. [ Claim 2 ]

The phase shifter of claim 1 , wherein the first ground line is coupled 460 to a ground. [ Claim 3 ]

The phase shifter of claim 2, further comprising: a ground plate disposed on a second surface opposed to a first surface, on which the first line is disposed, of the first substrate or disposed inside of 465 the first substrate, wherein the first ground line is electrically connected to the ground plate through at least one via hole. [ Claim 4 ]

The phase shifter of claim 1 , further comprising:

470 a second line disposed in a direction opposed to the first line on the basis of the center of the first substrate; and a second ground line disposed outside of the second line on the basis of the center of the first substrate, wherein the second ground line is coupled to a ground. 475 [ Claim 5 ]

The phase shifter of claiml , further comprising: a second line disposed between the center of the first substrate and the first line on the first substrate, and configured to be a conductor.

[ Claim 6 ] 480 The phase shifter of claim 1 , further comprising: a second substrate disposed in parallel to the first substrate; and a second line disposed to a location corresponding to the first line on the second substrate, wherein the second substrate is located between a reflection plate and 485 the first substrate. [ Claim 7]

The phase shifter of claim 6, further comprising: a second ground line disposed outside of the second line on the basis of a center of the second substrate. 490 [ Claim 8 ]

The phase shifter of claim 1 , wherein at least one ground member is disposed, with rod shape, outside of the first substrate to block the fringing field outputted from the first substrate, and is extended from a reflection plate in a direction vertical to the reflection plate. 495 [ Claim 9 ]

A phase shifter comprising: a first substrate having a certain dielectric constant; a first line disposed, in a given direction on the basis of a center of the first substrate, on the first substrate, and configured to be a conductor; 500 and a first ground disposed outside of the first line on the basis of the center of the first substrate. [ Claim 10]

The phase shifter of claim 9, further comprising: 505 a second substrate disposed in parallel to the first substrate, wherein a second line is disposed to a location corresponding to the first line on the second substrate. [ Claim 1 1 ]

The phase shifter of claim 10, further comprising:

510 a second ground disposed outside of the second line on the second substrate. [ Claim 12]

An antenna comprising: a reflection plate;

515 a phase shifter disposed over the reflection plate, and configured to have a first substrate, wherein a first line as a conductor is disposed on the first substrate; and at least one ground member longitudinal-extended from the reflection plate in a direction crossing over the reflection plate, and disposed outside of 520 the first substrate, wherein the ground member blocks a fringing field outputted from the first line. [ Claim 13 ]

The antenna of claim 12, further comprising:

525 a second substrate disposed between the reflection plate and the first substrate, wherein the ground member is disposed outside of the second substrate, and a second line as a conductor is disposed on the second substrate. [ Claim 14]

The antenna of claim 12, wherein a ground line is disposed outside of the first line on the first substrate or is disposed outside of the second line on the second substrate.