Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q21/00—Antenna arrays or systems
  • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
  • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
  • H01P1/00—Auxiliary devices
  • H01P1/18—Phase-shifters
  • H01P1/184—Strip line phase-shifters
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q1/00—Details of, or arrangements associated with, antennas
  • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
  • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
  • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
  • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
  • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
  • H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters

Definitions

• Example embodiment of the present invention relates to an antenna, more particularly relates to an antenna in which cables, for coupling lines to radiation elements, are electrically connected through a connection member.
• An antenna transmits/receives an electromagnetic wave by radiating a beam in a given direction, and includes generally elements shown in below FIG. 1.
• FIG. 1 is a perspective view illustrating schematically a common antenna.
• the antenna includes a phase shifter disposed on a reflection plate (not shown) and cables 110, 112, 114 and 116.
• the phase shifter includes a first dielectric substrate 100, a second dielectric substrate 102, a first line 104 and a second line 106, etc.
• the first line 104 is a conductor, and is formed on the first dielectric substrate 100.
• the second line 106 is a conductor, and is formed on the second dielectric substrate 102.
• the first cable 1 10 is connected to one end of the first line 104, and connects the first line 104 to corresponding radiation element, e.g. first radiation element.
• the second cable 1 12 is connected to the other end of the first line 1 04, and connects the first line 104 to corresponding radiation element, e.g. second radiation element.
• the third cable 1 14 is connected to one end of the second line 106, and connects the second line 106 to corresponding radiation element, e.g. third radiation element.
• the fourth cable 1 16 is connected to the other end of the second line
• Example embodiment of the present invention provides an antenna in which cables are electrically connected, thereby reducing loss of a phase shifter.
• An antenna includes a first dielectric substrate on which a first line as a conductor is disposed; a second dielectric substrate located over the first dielectric substrate, wherein a second line as a conductor is disposed on the second dielectric substrate; a first cable connected electrically to the first line; a second cable connected electrically to the second line; and a connection member configured to connect electrically the first cable to the second cable.
• the antenna further includes a reflection plate; and at least one radiation elements disposed on a first surface of the reflection plate, wherein the radiation elements disposed on a second surface opposed to a first surface corresponding to the dielectric substrates of surfaces of the reflection plate, the first cable connects electrically the first line to a first radiation element of the radiation elements, the second cable connects electrically the second line to a second radiation element of the radiation elements, and the connection member connects electrically an external conductor of the first cable to an external conductor of the second cable.
• An antenna includes a first dielectric substrate on which a first line as a conductor is disposed; a second dielectric substrate located over the first dielectric substrate, wherein a second line as a conductor is disposed on the second dielectric substrate; a first cable connected electrically to the first line; and a second cable connected electrically to the second line.
• the first cable is electrically to the second cable, thereby canceling a first leakage current flowed to the first cable from the first line and a second leakage current flowed to the second cable from the second line.
• An external conductor of the first cable is electrically connected to that of the second cable through a connection member as a conductor.
• An antenna according to still another example embodiment of the present invention includes a reflection plate; a first dielectric substrate
• a first line is disposed on the first dielectric substrate; a first cable connected electrically to the first line; and a first conduction member disposed on the first surface of the reflection plate, and connected electrically to the reflection plate, wherein the first cable is electrically connected to the first conduction
• the antenna further includes a second dielectric substrate disposed between the reflection plate and the first dielectric substrate, wherein a second line is disposed on the second dielectric substrate; a second cable connected electrically to the second line; at least one radiation element
• the first cable couples the firs line to a first radiation element of the radiation elements
• the second cable couples the second line to a
• the antenna further includes a second dielectric substrate disposed between the reflection plate and the first dielectric substrate, wherein a
• 100 second line is disposed on the second dielectric substrate; a second cable connected electrically to the second line; at least one radiation element disposed on a second surface opposed to the first surface of surfaces of the reflection plate; and a connection member configured to connect electrically an external conductor of the first cable to an external conductor of the
• An antenna according to still another example embodiment of the present invention includes a first dielectric substrate on which a first line and a second line as conductors are disposed; a first cable connected electrically to the first line; a second cable connected electrically to the
• connection member configured to connect electrically an external conductor of the first cable to an external conductor of the second cable.
• the antenna further includes a reflection plate, wherein the first dielectric substrate is disposed on the reflection plate, and at least one of the
• cables for connecting electrically lines to radiation elements, are
• connection member 120 coupled through a connection member. Accordingly, leakage currents are canceled each other, and thus loss of the antenna, more specially loss of a phase shifter may be reduced.
• a cable is electrically connected to a conduction member 125 coupled to a reflection plate, and so loss of a phase shifter may be reduced.
• FIG. 1 is a perspective view illustrating schematically an antenna
• FIG. 2 is a view illustrating an antenna according to a first example embodiment of the present invention
• FIG. 3 is a perspective view illustrating schematically a phase shifter according to one example embodiment of the present invention
• 135 is a view illustrating schematically a sub-phase shifter according to one example embodiment of the present invention
• FIG. 5 is a view illustrating experimental result about loss of conventional sub-phase shifters
• FIG. 6 is a view illustrating experimental result about loss of the sub- 140 phase shifters in FIG. 3 ;
• FIG. 7 is a perspective view illustrating an antenna according to a second example embodiment of the present invention.
• FIG. 8 is a view illustrating schematically an antenna according to a third example embodiment of the present invention. 145 [ 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 the present invention, however, example embodiments of the present 150 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.
• FIG. 2 is a view illustrating an antenna according to one example embodiment of the present invention.
• FIG. 3 is a perspective view illustrating schematically a phase shifter according to a first example embodiment of the present invention.
• an antenna of the present embodiment includes a reflection 200 plate 200, a phase shifter 202 and at least one radiation element 204.
• the reflection plate 200 functions as a ground and a reflector.
• the phase shifter 202 controls direction of a radiation pattern outputted from the radiation elements 204 by changing a phase of a RF signal provided to the radiation elements 204.
• the phase shifter 205 202 is disposed on a first surface of the reflection plate 200 as shown in FIG. 2(A).
• the radiation elements 204 radiate a beam in a specific direction in accordance with the RF signals provided through the phase shifter 202, and are disposed on a second surface opposed to the first surface of surfaces of 210 the reflection plate 200 as shown in FIG. 2(B).
• the radiation elements 204 are electrically connected to lines of the phase shifter 202 through corresponding cables.
• the phase shifter 202 of the present embodiment includes a first dielectric substrate 300, a second dielectric substrate 302, a first line
• phase shifter 202 has upper and lower laminated
• the first dielectric substrate 300 is disposed on the reflection plate 200, and is made up of a material having specific dielectric constant.
• a first ground plate is formed on a lower surface of the first dielectric substrate 300 or inside of the first dielectric substrate 300.
• the second dielectric substrate 302 is disposed between the reflection plate 200 and the first dielectric substrate 300, and is made up of a material having certain dielectric constant.
• a second ground plate is formed on a lower surface of the second dielectric substrate 302 or inside of the second dielectric substrate 302.
• the first line 304 is a conductor, and is disposed on the first dielectric substrate 300.
• the second line 306 is a conductor, and is disposed on the second dielectric substrate 302.
• the rotation axis 308 rotates the first arm member 310 and the second
• the rotation axis 308 is rotated by an exterior device (not shown), which is not shown in FIG. 3.
• a rotatory power in accordance with the rotation of the rotation axis 308 is delivered to the first arm member 310 and the second arm member 314.
• the first arm member 310 rotates in accordance with operation of the
• a third line as a conductor is formed on a lower surface of the first arm member 310.
• a phase of a RF signal transmitted through a portion corresponding to the third line of the first dielectric substrate 300, is changed.
• the RF signal having the
• the second arm member 314 rotates in accordance with operation of the rotation axis 308.
• a fourth line as a conductor is formed on a
• the first cable 320 connects electrically one end of the first line 304
• corresponding radiation element 204 e.g. first radiation element
• the internal conductor 320B is coupled to the end of the first line 304.
• the internal conductor 320B may be fixed by connecting to the end of the 260 first line 304 through a soldering, etc.
• the second cable 322 connects electrically the other end of the first line 304 to corresponding radiation element 204, e.g. a second radiation element.
• the third cable 324 connects electrically one end of the second line 265 306 to corresponding radiation element 204, e.g. third radiation element.
• the fourth cable 326 connects electrically the other end of the second line 306 to corresponding radiation element 204, e.g. fourth radiation element.
• the first connection member 330 is a conductor, and connects 270 electrically the first cable 320 to the third cable 324. Particularly, the external conductor 320A of the first cable 320 is coupled to an external conductor of the third cable 324.
• the second connection member 332 is a conductor, and connects electrically the second cable 322 to the fourth cable 326. Particularly, the 275 external conductor of the second cable 322 is coupled to an external conductor of the fourth cable 326.
• the antenna of the present embodiment connects electrically the cables 320, 322, 324 and 326 through the connection members 330 and 332. 280 Generally, leakage current flows to corresponding cable from one line, and affects other cables. As a result, loss of the antenna is increased.
• first sub-phase shifter a structure including the first dielectric substrate 300 and the first line 304, etc.
• second sub-phase shifter a structure including the second dielectric substrate 302 and the second line 290 306, etc. will be assumed as a second sub-phase shifter.
• FIG. 4 is a view illustrating schematically a sub-phase shifter according to one example embodiment of the present invention.
• FIG. 4 is a view illustrating schematically a sub-phase shifter according to one example embodiment of the present invention.
• FIG. 4 is a view illustrating schematically a sub-phase shifter according to one example embodiment of the present invention.
• the firs sub-phase shifter of the present embodiment includes the first dielectric substrate 300, the first line 302, a fifth line 400, a sixth line 402, the rotation axis 308 and the first arm member 3 10.
• new lines 400 and 402 may be further formed on the first dielectric substrate 300, which is not shown in FIG. 3.
• the fifth line 400 is a conductor, and is an input path of a RF signal.
• the sixth line 402 is disposed in a direction opposed to the first line 302 on the basis of the rotation axis 308.
• a fifth cable 404 connects electrically one end of the sixth line 402 to corresponding radiation element 204.
• a sixth cable 406 connects electrically the other end of the sixth line
• disposition of the lines may be variously modified.
• the cables for coupling the lines to corresponding radiation element 204 are also existed in
• the cable is electrically connected to another cable of the other sub-phase shifter as shown in FIG. 3.
• external conductors of the cables 320 and 404, coupled to the lines 302 and 402 of the same dielectric substrate 300, may be electrically connected through a 315 connection member (not shown).
• FIG. 5 is a view illustrating experimental result about loss of conventional sub-phase shifters.
• FIG. 6 is a view illustrating experimental result about loss of the sub-phase shifters in FIG. 3. Particularly, FIG. 5(A) shows loss of a first sub-phase shifter of the conventional sub-phase shifters,
• FIG. 320 and FIG. 5(B) illustrates loss of a second sub-phase shifter located under the first sub-phase shifter.
• FIG. 6(A) shows loss of the first sub-phase shifter of the sub-phase shifters of the present invention
• FIG. 6(B) illustrates the second sub-phase shifter located under the first sub-phase shifter.
• phase shifter of the present invention is smaller than that of the conventional first sub-phase shifter.
• loss of the second sub-phase shifter of the present invention is smaller than that of the conventional second sub-phase shifter. Specially, the loss of the
• FIG. 7 is a perspective view illustrating an antenna according to a second example embodiment of the present invention. 340 In FIG. 7, a phase shifter is disposed on a reflection plate 700.
• the phase shifter includes a first dielectric substrate 702, a second dielectric substrate 704, a first line 706, a second line 708, a conduction member 710, a first cable 712, a second cable 714, a first connection member 716 and a second connection member 718.
• the conduction member 710 is a conductor, and is formed on the 350 reflection plate 700 in a direction crossing over the reflection plate 700, preferably a direction vertical to the reflection plate 700.
• the first cable 712 connects electrically the first line 706 to corresponding radiation element.
• the second cable 714 connects electrically the second line 708 to 355 corresponding radiation element.
• the first connection member 716 connects electrically an external conductor of the first cable 712 to the conduction member 710, thereby reducing loss of a first sub-phase shifter.
• the first sub-phase shifter indicates a structure having the first dielectric substrate 702 and the first line
• the second connection member 718 connects electrically an external conductor of the second cable 714 to the conduction member 710, thereby reducing loss of a second sub-phase shifter.
• the second sub-phase shifter means a structure having the second dielectric substrate 704 and the
• the antenna of the present embodiment connects electrically the external conductors of the cables 712 and 714 to the reflection plate 700 through the connection members 716 and 718 and the conduction member 710, thereby reducing leakage current flowed to the cables 712 and 714.
• the cables 712 and 714 are coupled to the same conduction member 710. However, the cables 712 and 714 may be coupled to different conduction members, respectively.
• the conduction members are electrically connected to the reflection plate 700.
• cables 712 and 714 are not coupled each other.
• FIG. 8 is a view illustrating schematically an antenna according to a third example embodiment of the present invention.
• the antenna of the present embodiment includes a reflection plate 800, a phase shifter, conduction members 808, 810, 812 and 814, cables 820, 822, 824 and 826 and connection members 830, 832, 834 and 836.
• the phase shifter includes a dielectric substrate 802, a first line 804 385 and a second line 806, etc. That is, the phase shifter is made up of only one sub-phase shifter unlike in the first embodiment and the second embodiment which include plural sub-phase shifters.
• the first cable 820 is coupled to an end of the first line 804, and is electrically connected to the first conduction member 808 through the first 390 connection member 830.
• the second cable 822 is coupled to the other end of the first line 804, and is coupled to the second conduction member 810 through the second connection member 832.
• the third cable 824 is coupled to an end of the second line 806, and is 395 electrically connected to the third conduction member 812 through the third connection member 834.
• the fourth cable 826 is coupled to the other end of the third line 808, and is electrically connected to the fourth conduction member 814 through the fourth connection member 836.
• the cables 820, 822, 824 and 826 are electrically connected to the reflection plate 800 through the connection members 830, 832, 834 and 836 and the conduction members 808, 810, 812 and 814. As a result, loss of the phase shifter may be reduced.

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• Aerials With Secondary Devices (AREA)
• Variable-Direction Aerials And Aerial Arrays (AREA)

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Publications (1)

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Cited By (1)

Citations (4)

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• 2008
  • 2008-08-11 KR KR20080078513A patent/KR101007904B1/ko active IP Right Grant
  • 2008-12-08 CN CN200880130725.5A patent/CN102119468B/zh not_active Expired - Fee Related
  • 2008-12-08 WO PCT/KR2008/007255 patent/WO2010018899A1/en active Application Filing

Patent Citations (4)

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