EP0414266B1 - Antenne à microbandes avec plaque à fente - Google Patents

Antenne à microbandes avec plaque à fente Download PDF

Info

Publication number
EP0414266B1
EP0414266B1 EP90116272A EP90116272A EP0414266B1 EP 0414266 B1 EP0414266 B1 EP 0414266B1 EP 90116272 A EP90116272 A EP 90116272A EP 90116272 A EP90116272 A EP 90116272A EP 0414266 B1 EP0414266 B1 EP 0414266B1
Authority
EP
European Patent Office
Prior art keywords
antenna
slots
dielectric substrate
radiating element
slot plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90116272A
Other languages
German (de)
English (en)
Other versions
EP0414266A1 (fr
Inventor
Masahiko Ohta
Kazuo Kaneko
Hiroyuki Iyama
Seizi Kado
Mituru Hirao
Hironori Ishizaka
Ken Ji Ohmaru
Takao Murata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Broadcasting Corp
Showa Denko Materials Co ltd
Original Assignee
Hitachi Chemical Co Ltd
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Chemical Co Ltd, Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Hitachi Chemical Co Ltd
Publication of EP0414266A1 publication Critical patent/EP0414266A1/fr
Application granted granted Critical
Publication of EP0414266B1 publication Critical patent/EP0414266B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0075—Stripline fed arrays
    • H01Q21/0081—Stripline fed arrays using suspended striplines
    • 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
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/064—Two dimensional planar arrays using horn or slot aerials

Definitions

  • the present invention relates to a so called stripline patch type antenna to be utilized in a microwave communication, as set forth in the preamble of claim 1.
  • An antenna of this kind is known from IEEE Transactions on Broadcastings, vol.34, no.4 December 1988, pages 457-464, Ito et al. "Planar antennas for satellite reception”.
  • parabola antennas and plane antennas are utilized for the microwave communication. Since the satellite broadcasting has started, although the parabola antennas are more commonly employed for this purpose so far, the plane antennas have been attracting much attentions, because the plane antennas are thin plate shaped, light weighted, and hence easier to handle.
  • plane antennas Up to date, various types of the plane antennas have been developed, including a microstrip antenna, a strip patch antenna, a radial line antenna, a triplate antenna, and a suspended line antenna.
  • a type of a plane antenna in which the strip patch antenna is combined with a slot plate is known to be capable of obtaining a high antenna gain.
  • This stripline patch antenna 101 comprises a plate shaped dielectric substrate 102, a grounding conductor plate 103 attached on a back of the dielectric substrate 102, a square shaped radiating element 104 attached on a front of the dielectric substrate 102, a feed line 105 connected to the radiating element 104, and a slot plate 107 having a slot 106 above the radiating element 104, which is mounted at a prescribed distance above the dielectric substrate 102.
  • the entire antenna is formed from a plurality of radiating element 104 and slot 106 combinations just described.
  • this stripline patch antenna 101 when signals to be transmitted are supplied from a transmitter device through the feed line 105, the signals are transformed into radio wave by the radiating element 104, which is then emitted through the slot 106. On the other hand, when the radio wave is received through the slot 106, this radio wave is transformed into signals by the radiating element 104, and the obtained signals are then supplied to a receiver device through the feed line 105.
  • FIG. 2 A relationship between a relative antenna gain and an angle for this stripline patch type antenna 101 at 12 GHz frequency is shown in Fig. 2, while a relationships between a relative dielectric constant of the dielectric substrate 102 and an antenna gain for this stripline patch antenna 101 is shown in Fig. 3.
  • the antenna gain for this stripline patch antenna is at most 10 dB, but the material having a relative dielectric constant of about 2 is normally used, so that the antenna gain is usually about 7 to 8 dB.
  • the feed lines 105 have to be lengthened, which in turn increases a loss due to the feed lines 105.
  • the impedance of the feed lines 105 have to be adjusted by changing the widths of the feed lines 105, while the feed lines 105 also have to make turns and branches in order to be arranged in the space between the radiating elements 104, and such changing widths and turning and branching of the feed lines 105 are the source of the loss due to the feed lines 105, which will be increased when the feed lines 105 are lengthened.
  • the feed lines 105 are effectively shielded between the grounding conductor plate 103 and the slot plate 107, so that the loss due to the feed lines 105 is less than that for an antenna without a slot plate.
  • the transmission loss within the feed lines 105 themselves are larger, so that when the gain of over 30 dB is to be obtained, the efficiency of only about 50 to 60% can be achieved.
  • This is inferior to the parabola antenna which can achieve the efficiency of over 70% for the same gain. Consequently, in order to achieve the same high efficiency as the parabola antenna does by the plate antenna, an area of the plane antenna have to be 20 to 40% larger than that of the parabola antenna.
  • a stripline patch type plane antenna comprising: a plurality of antenna units as set forth in claim 1 arranged in array on a common dielectric substrate.
  • Fig. 1(A) is a cross sectional view of an example of a conventional stripline patch antenna having a slot plate.
  • Fig. 1(B) is a top view of the example of a conventional stripline patch antenna of Fig. 1.
  • Fig. 2 is a graph of a relative antenna gain versus a angle for the example of a conventional stripline patch antenna of Fig. 1.
  • Fig. 3 is a graph of an antenna gain versus a relative dielectric constant for the example of a conventional stripline patch antenna of Fig. 1.
  • Figs. 4(A) and 4(B) are cross sectional view and top plan view, respectively, of a first embodiment of a stripline patch type antenna with a slot plate according to tee present invention.
  • Fig. 5 is a graph of a relative antenna gain versus an angle for an example of a stripline patch antenna constructed in accordance with the first embodiment of Figs. 4(A) and 4(B).
  • Fig. 6 is a graph of a relative antenna gain versus a frequency for an example of a stripline patch antenna constructed in accordance with the first embodiment of Figs. 4(A) and 4(B).
  • Fig. 7 is a cross sectional view of a second embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 8 is a cross sectional view of a third embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 9 is a cross sectional view of a fourth embodiment of a stripline patch-type antenna with a slot plate according to the present invention.
  • Fig. 10 is a cross sectional view of a fifth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 11 is a cross sectional view of a sixth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 12 is a cross sectional view of a seventh embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Figs. 13(A) and 13(B) are cross sectional view and top plan view, respectively, of an eighth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Figs. 14(A) and 14(B) are cross sectional view and top plan view, respectively, of a ninth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 15 is a graph of a relative antenna gain versus a radius of a circle along which the slots are arranged in the eighth and ninth embodiments of a stripline patch antenna of Figs. 13(A) and 13(B), and Figs. 14(A) and 14(B).
  • Figs. 16(A) and 16(B) are cross sectional view and top plan view, respectively, of a tenth embodiment of a stripline patch type antenna with a slot plate 'according to the present invention.
  • Fig. 17 is a cross sectional view of an eleventh embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 18 is a cross sectional view of a twelfth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 19 is a cross sectional view of a thirteenth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 20 is a top view of one example of arrangement of the slots in array to construct a plane antenna from antenna units.
  • Fig. 21 is a top view of another example of arrangement of the slots in array to construct a plane antenna from antenna units.
  • Fig. 22 is a top view of another example of arrangement of the slots in array to construct a plane antenna from antenna units.
  • Fig. 23 is a top view of another example of arrangement of the slots in array to construct a plane antenna from antenna units.
  • Figs. 24(A) and 24(B) are cross sectional view and top plan view, respectively, of a fourteenth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 25 is a cross sectional view of a fifteenth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 26 is a cross sectional view of a sixteenth embodiment of a stripline patch type antenna with a slot plate according to the present invention.
  • Fig. 27 is an expanded cross sectional view of an example of a stripline patch type antenna with a slot plate according to the present invention, for explaining one possible manner of its construction.
  • This stripline patch type antenna 1 comprises a flat plate shaped dielectric substrate 2, a grounding conductor plate 3 attached underneath the dielectric substrate 2, a square shaped radiating element 4 attached over the dielectric substrate 2, a feed line 5 connected to two sides of the radiating element 4, an air layer 6 formed above the dielectric substrate 2, and a metal plate 8 having a plurality (more than a number of associated radiating element 4) of slots 7 on a circle centered around a position directly above the radiating element 4.
  • This arrangement of the slots 7 on a circle is not indispensable but preferable. In general, it is preferable to arrange the slots 7 symmetrically with respect to the associated radiating element 4. In practice, a plurality of such an antenna unit will be arranged in array to form a single plane antenna.
  • this stripline patch type antenna 1 when signals to be transmitted are supplied from a transmitter device through the feed line 5, the signals are transformed into radio wave by the radiating element 4, which is then emitted through the slots 7. On the other hand, when the radio wave is received through the slots 7, this radio wave is transformed into signals by the radiating element 4, and the obtained signals are then supplied to a receiver device through the feed line 5.
  • the dielectric substrate 2 is made from an insulative material of small dielectric loss and relative dielectric constant, such as foamed polyethylene.
  • an insulative material of small dielectric loss and relative dielectric constant such as foamed polyethylene.
  • a use of an organic insulative material is preferable, but a foamed material containing air inside, or air itself may also be used.
  • the air is used for the dielectric substrate 2, supporting members for supporting the radiating element 4 and the grounding conductor plate 3 have to be provided.
  • the grounding conductor plate 3 is made of a metallic material or a metallic film formed from a metallic material such as aluminum, iron, copper, nickel, or an alloy containing these metals. Actually, any metallic material can be used for this grounding conductor plate 3, although those enumerated above are preferable choices in terms of economical consideration and mechanical and electrical properties.
  • This grounding conductor plate can be manufactured as a thin layer formed by a sputtering or a vaporization applied to the dielectric substrate 3, or as a thin metal foil formed by a metal rolling, or an electrolyric metal plating, which is attached to the dielectric substrate 2.
  • this grounding conductor plate is such that a transmission efficiency of over 90% is attainable for a conducting body given by a surface skin effect which depends on a frequency and an amount of current, and more preferably such that the transmission efficiency of over 99% is attainable for the conducting body given by the surface skin effect. Also, this grounding conductor plate 3 may be placed at a prescribed distance apart from the dielectric substrate 3 if desired.
  • the radiating element 4 and the feed line 5 can be formed by a general wiring method such as an etching of a selected portion of a metal foil attached in advance to the dielectric substrate 2, or an electroless plating applied to an appropriate conductor element, or a silk printing of an appropriate conductor element in paste like state.
  • the metal plate 8 is made from a metallic material such as aluminum, iron, copper, nickel, or an alloy containing these metals.
  • the slots 7 on this metal plate 8 can be formed by a press die cutting, an etching, or a laser manufacturing.
  • a shape of each slot 7 a cross shape is most common, but other shapes such as circular one, square one, and others may also be used.
  • a stripline patch type antenna was constructed by using an aluminum plate of 0.5 mm thickness as the metal plate 8, foamed polyethylene sheet of 0.8 mm thickness and 1.77 relative dielectric constant as the dielectric substrate 2, metal rolled copper foils of 35 ⁇ m thickness manufactured by etching as the radiating element 4 and feed line 5, and an aluminum plate of 1 mm thickness as the grounding conductor plate 3.
  • the air layer 6 of 8 mm thickness is formed between the dielectric substrate 2 and the metal plate 8, and eight slots 7 are arranged at regular intervals on a circle of 14 mm radius centered around the radiating element 4, where each slot is formed by combining a slot of 3 mm width and 12.5 mm length in cross shape.
  • This improvement is due to the improved directivity achieved by narrowing a beam width of the radio wave transmitted or received through the slots 7, which is resulting from the configuration of this first embodiment in which a number of the slots 7 provided is greater than that of the radiating element 4, so that the radio wave to be transmitted or received by the radiating element 4 is broken up into narrow beams having the same gain.
  • a second embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1b differs from the antenna 1 of the first embodiment in that the air layer 6 shown in Fig. 4(A) is replaced by a foamed material layer 10 of 8 mm thickness and relative dielectric constant of approximately 1. Since this foamed material layer 10 can functions similarly to the air layer 6 of the first embodiment, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this second embodiment.
  • a third embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1c differs from the antenna 1 of the first embodiment in that the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 such as a polyethylene film of 25 ⁇ m thickness and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3. Since this combination of the dielectric film 11 and the air layer 13 can functions similarly to the dielectric substrate 2 of the first embodiment, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this third embodiment.
  • a dielectric film 11 such as a polyethylene film of 25 ⁇ m thickness
  • another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3. Since this combination of the dielectric film 11 and the air layer 13 can functions similarly to the dielectric substrate 2 of the first embodiment, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this third embodiment.
  • a fourth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1d differs from the antenna 1 of the first embodiment in that the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 such as a polyethylene film of 25 ⁇ m thickness and a foamed material layer 15 of low relative dielectric constant formed between this dielectric film 11 and the grounding conductor plate 3. Since this combination of the dielectric film 11 and the foamed material layer 15 can functions similarly to the dielectric substrate 2 of the first embodiment, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this fourth embodiment.
  • a dielectric film 11 such as a polyethylene film of 25 ⁇ m thickness
  • a foamed material layer 15 of low relative dielectric constant formed between this dielectric film 11 and the grounding conductor plate 3. Since this combination of the dielectric film 11 and the foamed material layer 15 can functions similarly to the dielectric substrate 2 of the first embodiment, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and
  • a fifth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1e differs from the antenna 1 of the first embodiment in that the metal plate 8 shown in Fig. 4(A) is replaced by a layer film 22 formed from a dielectric film 20 made of a polyethylene sheet of 25 ⁇ m thickness and relative dielectric constant of 2.44, and a metal rolled copper foil 21 of 35 ⁇ m thickness, where the slots 7 are formed by etching the copper foil 21 at appropriate locations, while the air layer 6 shown in Fig. 4(A) is replaced by a foamed material layer 10 of 8 mm thickness and relative dielectric constant of approximately 1, as in the second embodiment above, where the layer film 22 has the dielectric film 20 facing the foamed material layer 10.
  • a sixth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1f differs from the antenna 1 of the first embodiment in that the metal plate 8 shown in Fig. 4(A) is replaced by a layer film 26 formed from a dielectric film 24 made of a polyethylene sheet of 25 ⁇ m thickness and relative dielectric constant of 2.44, and a metal rolled copper foil 25 of 35 ⁇ m thickness, where the slots 7 are formed by die cutting this layer film 26 at appropriate locations, while the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3, as in the third embodiment above.
  • a seventh embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1g differs from the antenna 1 of the first embodiment in that the metal plate 8 shown in Fig. 4(A) is replaced by a layer film 31 formed from a dielectric film 30 made of a polyethylene sheet 28 of 25 urn thickness and relative dielectric constant of 2.44, and a metal rolled copper foil 29 of 35 urn thickness, where the slots 7 are formed by etching the copper foil 29 at appropriate locations, and where the layer film 30 has the copper foil 29 facing the air layer 6, while the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3, as in the third embodiment above.
  • FIG. 13(A) and 13(B) an eighth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1h differs from the antenna 1 of the first embodiment in that the air layer 6 shown in Fig. 4(A) is replaced by a foamed material layer of 8 mm thickness and relative dielectric constant of approximately 1, as in the second embodiment above, while the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3, as in the third embodiment above, and furthermore an additional slot 39 is provided on the metal plate 8 at a position directly above the radiating element 4. Even with this additional slot 39, because of the function of the other slots 7, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this eighth embodiment.
  • a ninth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1i differs from the antenna 1 of the first embodiment in that the air layer 6 shown in Fig. 4(A) is replaced by a foamed material layer of 8 mm thickness and relative dielectric constant of approximately 1, as in the second embodiment above, while an additional slot 39 is provided on the metal plate 8 at a position directly above the radiating element 4, as in the eighth embodiment above, and furthermore the slots 7 are formed such that each one of the slots 7 is oriented in a direction which differs by 450 from those of the neighboring ones. Even with this configuration of the slots 7, because the slots 7 function essentially in the same manner, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this ninth embodiment.
  • a tenth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1j differs from the antenna 1 of the first embodiment in that the eight slots 7 shown in Fig. 4(A) are replaced by four slots 46 arranged on the same circle of 14 mm radius centered around the position directly above the radiating element 4, while the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3, as in the third embodiment above.
  • the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this tenth embodiment.
  • Fig. 17 an eleventh embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1k differs from the antenna 1 of the first embodiment in that an additional slot 39 is provided on the metal plate 8 at a position directly above the radiating element 4, as in the eighth embodiment above, while the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3, as in the third embodiment above, and furthermore the radiating element 4 shown in Fig. 4(A) is replaced by a passive element 47 located below the additional slot 39 on the dielectric film 11 and a lower radiating element 48 located below the passive element 47 on another side of the dielectric film 11 to which the feed line 5 is connected.
  • the passive element 47 and the lower radiating element 48 because of the slots 7, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this eleventh embodiment.
  • a twelfth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1l differs from the antenna 1 of the first embodiment in that an additional slot 39 is provided on the metal plate 8 at a position directly above the radiating element 4, as in the eighth embodiment above, while the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3, as in the third embodiment above, and furthermore the radiating element 4 shown in Fig.
  • a thirteenth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 1m differs from the antenna 1 of the first embodiment in that an additional slot 39 is provided on the metal plate 8 at a position directly above the radiating element 4, as in the eighth embodiment above, while the dielectric substrate 2 shown in Fig. 4(A) is replaced by a combination of a dielectric film 11 and another air layer 13 formed between this dielectric film 11 and the grounding conductor plate 3, as in the third embodiment above, and furthermore the radiating element 4 shown in Fig.
  • the metal plate 8 shown in Fig. 4(A) is replaced by a layer film 33 formed from a dielectric film 31 made of a polyethylene sheet of 25 urn thickness and relative dielectric constant of 2.44, which is sandwiched between two metal rolled copper foils 32 of 35 urn thickness each, where the slots 7 and 39 are formed by etching these copper foils 32 at appropriate locations.
  • a layer film 33 because of the slots 7, the results similar to those obtained for the first embodiment, such as those shown in Figs. 5 and 6, can also be obtained by this thirteenth embodiment.
  • a plurality of antenna units such as those described as various embodiments will be arranged in array to form a single plane antenna.
  • a plurality of antenna units each in a form of the first embodiment described above, may be arranged such that each antenna unit shares two of the slots 7 with each one of the neighboring antenna units, where these two slots to be shared are located on the intersections made on the circles for the slots 7 of the neighboring antenna units.
  • FIG. 21 Another example is shown in Fig. 21, where the plurality of antenna units, each having four slots 46 in a manner similar to the tenth embodiment described above, may be arranged such that each antenna unit shares one of the slots 46 with each one of the antenna units located at upper left, upper right, lower left, and lower right sides.
  • FIG. 22 Another example is shown in Fig. 22, where the plurality of antenna units, each in a form of the tenth embodiment described above, may be arranged such that each antenna unit shares one of the slots 46 with each one of the antenna units located at left, right, upper, and lower sides.
  • FIG. 23 Another example is shown in Fig. 23, where the plurality of antenna units, each having four slots 46 in a manner similar to the tenth embodiment described above plus one slot 39 located above the radiating element 4, may be arranged such that each antenna unit shares two of the slots 46 with each one of the antenna units located at left, right, upper, and lower sides.
  • a fourteenth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • This stripline patch type antenna 50 comprises a plate shaped triplate substrate 51 including a lower metal plate 60 having a rectangular shaped lower slot 55, a dielectric substrate 58, a feed conductor 54 located on the dielectric substrate 58, a dielectric plate 57 placed between the lower metal plate 60 and the dielectric substrate 58, and a grounding conductor plate 59 attached underneath the dielectric substrate 58; an upper metal plate 52 having a plurality of rectangular shaped upper slots 56; and a supporting dielectric member 53 placed between the upper metal plate 52 and the lower metal plate 60 of the triplate substrate 51.
  • the feed conductor 54 is extending to a position below the lower slot 55, while the upper slots 56 are arranged at regular intervals in two rows, along a direction of the feed conductor 54, symmetrically with respect to the lower slot 55.
  • Each of the dielectric substrate 58, the dielectric plate 57 and the supporting dielectric member 53 is made from an insulative material of small dielectric loss and relative dielectric constant, such as foamed polyethylene.
  • the feed conductor 54 can be formed by a general wiring method such as an etching of a selected portion of a metal foil attached in advance to either the dielectric substrate 58 or the dielectric plate 57, or an electroless plating applied to an appropriate conductor element, or a silk printing of an appropriate conductor element in paste like state.
  • the grounding conductor plate 59 is a metallic film formed from a metallic material such as aluminum, iron, copper, nickel, or an alloy containing these metals, which can be manufactured as a thin layer formed by a sputtering or a vaporization applied to the dielectric substrate 58, or as a thin metal foil formed by a metal rolling, or an electrolyric metal plating, which is attached to the dielectric substrate 58.
  • the lower metal plate 60 is made from a metallic material such as aluminum, iron, copper, nickel, or an alloy containing these metals, which may be manufactured as a thin layer formed by a sputtering or a vaporization applied to the dielectric plate 57, or as a thin metal foil formed by a metal rolling, or an electrolyric metal plating. which is attached to the dielectric plate 57. A part of this lower metal plate 60 is connected with the grounding conductor plate 59 physically.
  • the upper metal plate 52 is made from a metallic material such as aluminum, iron, copper, nickel, or an alloy containing these metals.
  • the upper slots 56 on this upper metal plate 52 can be formed by a press die cutting, an etching. or a laser manufacturing.
  • this stripline patch type antenna 50 when signals to be transmitted are supplied from a transmitter device through the feed conductor 54, the signals are transformed into radio wave by the combination of the feed conductor 54 and the lower slot 55, which is then emitted through the upper slots 56. On the other hand, when the radio wave is received through the upper slots 56, this radio wave is transformed into signals by the combination of the lower slot 55 and the feed conductor 54, and the obtained signals are then supplied to a receiver device through the feed conductor 54.
  • an improved directivity can be achieved by adjusting the shape, number and pitch of the upper slots 56 which function as radio wave lenses.
  • the loss due to the feed conductor 54 can be reduced, and the number of radiating elements per unit area can be reduced.
  • a fifteenth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 50b differs from the antenna 50 of the fourteenth embodiment in that the rectangular shaped lower and upper slots 55 and 56 shown in Fig. 24(A) are replaced by cross shaped lower and upper slots 66 and 67, while the feed conductor 54 shown in Fig. 24(A) is replaced by a feed line 65 having two branched ends 65a and 65b which are oriented in directions crossing at 900 with each other and which have a length difference equal to a quarter of a wavelength to be transmitted or received, where the lower slot 66 is located above the region enclosed by the two branched ends 65a and 65b of the feed line 65.
  • Fig. 26 a sixteenth embodiment of a stripline patch type antenna with a slot plate, according to the present invention will be described.
  • the antenna 50b differs from the antenna 50 of the fourteenth embodiment in that the rectangular shaped upper slots 56 shown in Fig. 24(A) are replaced by cross shaped upper slots 67, as in the fifteenth embodiment above, while the feed conductor 54 shown in Fig. 24(A) is replaced by a feed line 65 having two branched ends 65a and 65b which are connected to two adjacent sides of a square patch 68, and furthermore, the rectangular shaped lower slot 55 is replaced by a square shaped lower slot 70 located above the square patch 68.
  • the antenna may be constructed by combining separately manufactured elements together, rather than using the manufacturing methods described above such as etching, electroless plating, silk printing, sputtering, vaporization, metal rolling, and electrolyric metal plating.
  • the feed conductor 54 is formed by attaching a separately manufactured tape like rolled copper foil 71 on a film like dielectric member 70, then this feed conductor 54 is sandwiched between the separately prepared dielectric substrate 58 and dielectric plate 57, and then separately prepared conductive plates 73 and 74 are attached as the metal plate 55 and the grounding conductor plate 59.

Landscapes

  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (34)

  1. Antenne du type à microbandes, comprenant :
       un substrat diélectrique (2) ;
       un conducteur de mise à la masse (3) disposé sur un côté particulier du substrat diélectrique (2) ;
       des moyens formant élément de rayonnement (4) supportés sur le substrat diélectrique (2), pour émettre et recevoir des ondes radioélectriques ;
       des moyens formant ligne d'alimentation (5) supportés sur un autre côté du substrat diélectrique (2), opposé audit côté particulier, pour émettre des signaux vers les moyens formant élément de rayonnement (4) et pour émettre des signaux provenant de ces derniers ; et
       une plaque à fentes (8) disposée sur le même côté du substrat diélectrique (2) que les moyens formant ligne d'alimentation (5) de sorte que les moyens formant ligne d'alimentation (5) soient entre le substrat diélectrique et la plaque à fentes (8) ;
       CARACTERISEE EN CE QUE la plaque à fentes (8) comporte une pluralité de fentes (7) plus nombreuses que les moyens formant élément de rayonnement (4).
  2. Antenne selon la revendication 1, dans laquelle les fentes (7) sont disposées sur la plaque à fentes (8), de manière symétrique par rapport à une position des moyens formant élément de rayonnement (4).
  3. Antenne selon la revendication 2, dans laquelle les fentes (7) sont disposées à des intervalles réguliers le long d'un cercle centré autour de la position des moyens formant élément de rayonnement (4).
  4. Antenne selon la revendication 1, dans laquelle toutes les fentes (7) sont situées de façon décalée par rapport à une position directement opposée aux moyens formant élément de rayonnement (4).
  5. Antenne selon la revendication 1, dans laquelle la plaque à fentes (8) comporte une fente supplémentaire (39) située directement en face des moyens formant élément de rayonnement (4).
  6. Antenne selon la revendication 1, dans laquelle les moyens formant élément de rayonnement (4) comprennent une couche de métal formée sur le substrat diélectrique (2).
  7. Antenne selon la revendication 1, dans laquelle le conducteur de mise à la masse (3) comprend une couche de métal formée sur le substrat diélectrique (2).
  8. Antenne selon la revendication 1, dans laquelle le substrat diélectrique (2) comprend un film diélectrique.
  9. Antenne selon la revendication 1, comprenant, de plus, une couche diélectrique (6, 10) entre la plaque à fentes (8) et le substrat diélectrique (2).
  10. Antenne selon la revendication 9, dans laquelle la couche diélectrique (6, 10) est une couche d'air (6).
  11. Antenne selon la revendication 9, dans laquelle la couche diélectrique (6, 10) est une couche de produit alvéolaire (10).
  12. Antenne selon la revendication 1, comprenant, de plus, une couche diélectrique (13, 15) entre le conducteur de mise à la masse (3) et le substrat diélectrique (2).
  13. Antenne selon la revendication 12, dans laquelle la couche diélectrique (13, 15) est une couche d'air (13).
  14. Antenne selon la revendication 12, dans laquelle la couche diélectrique (13, 15) est une couche de produit alvéolaire (15).
  15. Antenne selon la revendication 1, dans laquelle la plaque à fentes (8) comprend une plaque de métal.
  16. Antenne selon la revendication 1, dans laquelle la plaque à fente (8) comprend une feuille de métal (21, 25, 29) fixée à un film diélectrique (20, 24, 28).
  17. Antenne selon la revendication 16, dans laquelle les fentes (7) sont formées en enlevant des parties appropriées des feuilles de métal (21, 29).
  18. Antenne selon la revendication 17, dans laquelle la feuille de métal (29) fait face aux moyens formant élément de rayonnement (4).
  19. Antenne selon la revendication 17, dans laquelle la feuille de métal (21, 25) tourne le dos aux moyens formant élément de rayonnement (4).
  20. Antenne selon la revendication 16, dans laquelle les fentes (7) sont formées en enlevant en même temps des parties appropriées de la feuille de métal (25) et du film diélectrique (24).
  21. Antenne selon la revendication 1, dans laquelle les fentes (7) sont orientées de sorte que les fentes voisines (7) soient orientées suivant des directions différentes.
  22. Antenne selon la revendication 1, dans laquelle les moyens formant élément de rayonnement (4) sont supportés sur ledit autre côté du substrat diélectrique (2) faisant face à la plaque à fentes (8).
  23. Antenne selon la revendication 1, dans laquelle les moyens formant élément de rayonnement (48) sont supportés sur ledit côté particulier du substrat diélectrique (2) tournant le dos à la plaque à fentes (8).
  24. Antenne selon la revendication 23, comprenant, de plus, un élément passif (47) supporté sur ledit autre côté du substrat diélectrique (2) faisant face à la plaque à fentes (8), à une position directement au-dessus des moyens formant élément de rayonnement (48).
  25. Antenne selon la revendication 1, comprenant, de plus, des moyens supplémentaires formant élément de rayonnement (49) situés sous une des fentes (7).
  26. Antenne du type à microbandes, comprenant :
       un substrat triplaque (51), comprenant :
          un substrat diélectrique (58) ;
          un conducteur de mise à la masse (59) disposé sur un côté particulier du substrat diélectrique (58) ;
          une plaque inférieure à fentes (60) disposée sur l'autre côté du substrat diélectrique (58), opposé audit côté particulier, la plaque inférieure à fentes (60) comportant une fente inférieure (55, 66) ; et
          des moyens formant conducteur d'alimentation (54, 65) supportés sur le substrat diélectrique (58), et s'étendant vers une position de la fente inférieure (55, 66), pour émettre des signaux ; et
       une plaque supérieure à fentes (52) disposée sur ledit autre côté du substrat triplaque (51) de sorte que la plaque inférieure à fentes (60) soit entre le substrat diélectrique (58) et la plaque supérieure à fentes (52), et comportant une pluralité de fentes supérieures (56, 67) ;
       CARACTERISEE EN CE QUE la plaque supérieure à fentes (52) comporte une pluralité de fentes supérieures (56,67) plus nombreuses que la feute inférieure.
  27. Antenne selon la revendication 26, dans laquelle les moyens formant ligne d'alimentation (65) possèdent deux extrémités formant branches (65a, 65b) qui sont orientées suivant des directions se croisant à 90°, où la fente inférieure (66) est située en face de la zone délimitée par les deux extrémités formant branches (65a, 65b).
  28. Antenne selon la revendication 27, dans laquelle les deux extrémités formant branches (65a, 65b) des moyens formant ligne d'alimentation (65) ont une différence de longueur égale à un quart d'une longueur d'onde des signaux à transmettre.
  29. Antenne selon la revendication 26, dans laquelle les moyens formant ligne d'alimentation (65) possèdent deux extrémités formant branches (65a, 65b) qui sont reliées à deux côtés adjacents d'une bande carrée (68), et dans laquelle la fente inférieure (70) est située directement en face de la bande carrée (68).
  30. Antenne plane du type à microbandes, comprenant une pluralité d'unités formant antenne, selon la revendication 1, et disposée en une matrice sur un substrat diélectrique commun.
  31. Antenne selon la revendication 30, dans laquelle les unités formant antenne sont disposées de façon qu'au moins une des fentes (7) de chaque unité formant antenne soit partagée avec une unité voisine formant antenne.
  32. Antenne selon la revendication 31, dans laquelle chaque unité formant antenne a les fentes (7) disposées à des intervalles réguliers le long d'un cercle centré autour de la position des moyens formant élément de rayonnement (4), et dans laquelle les fentes (7), partagées avec une unité voisine formant antenne, sont situées aux intersections des cercles pour les unités voisines formant antenne.
  33. Antenne selon la revendication 31, dans laquelle chaque unité formant antenne a les fentes (7) disposées le long d'un rectangle, et dans laquelle les fentes (7), partagées avec une unité voisine formant antenne, sont situées sur les coins partagés avec la même unité voisine formant antenne.
  34. Antenne selon la revendication 31, dans laquelle chaque unité formant antenne a les fentes (7) disposées le long d'un rectangle, et dans laquelle les fentes (7), partagées avec une unité voisine formant antenne, sont situées sur les côtés partagés avec la même unité voisine formant antenne.
EP90116272A 1989-08-25 1990-08-24 Antenne à microbandes avec plaque à fente Expired - Lifetime EP0414266B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP219488/89 1989-08-25
JP1219488A JP2898659B2 (ja) 1989-08-25 1989-08-25 スロット板付マイクロストリップパッチアンテナ

Publications (2)

Publication Number Publication Date
EP0414266A1 EP0414266A1 (fr) 1991-02-27
EP0414266B1 true EP0414266B1 (fr) 1995-11-08

Family

ID=16736232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90116272A Expired - Lifetime EP0414266B1 (fr) 1989-08-25 1990-08-24 Antenne à microbandes avec plaque à fente

Country Status (4)

Country Link
EP (1) EP0414266B1 (fr)
JP (1) JP2898659B2 (fr)
KR (1) KR0142567B1 (fr)
DE (1) DE69023427T2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2846081B2 (ja) * 1990-07-25 1999-01-13 日立化成工業株式会社 トリプレート型平面アンテナ
US5278569A (en) * 1990-07-25 1994-01-11 Hitachi Chemical Company, Ltd. Plane antenna with high gain and antenna efficiency
CN107543969A (zh) * 2016-06-29 2018-01-05 广州司南天线设计研究所有限公司 一种介电常数的测试方法与装置
JP6971350B2 (ja) * 2020-03-17 2021-11-24 ソフトバンク株式会社 アンテナ装置、無線通信装置及び移動体
CN115425394B (zh) * 2022-08-05 2024-02-27 中国电子科技集团公司第十四研究所 一种基于层叠式结构的带状线以及基于异质基材三维堆叠的层叠式阵面天线单元

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364050A (en) * 1981-02-09 1982-12-14 Hazeltine Corporation Microstrip antenna
US4554549A (en) * 1983-09-19 1985-11-19 Raytheon Company Microstrip antenna with circular ring
FR2598036B1 (fr) * 1986-04-23 1988-08-12 France Etat Antenne plaque a doubles polarisations croisees
EP0295003A3 (fr) * 1987-06-09 1990-08-29 THORN EMI plc Antenne

Also Published As

Publication number Publication date
DE69023427D1 (de) 1995-12-14
DE69023427T2 (de) 1996-04-04
JPH0382205A (ja) 1991-04-08
KR910005515A (ko) 1991-03-30
EP0414266A1 (fr) 1991-02-27
JP2898659B2 (ja) 1999-06-02
KR0142567B1 (ko) 1998-08-01

Similar Documents

Publication Publication Date Title
US5187490A (en) Stripline patch antenna with slot plate
EP0188345B1 (fr) Système d'antennes à deux bandes de fréquences
US5892482A (en) Antenna mutual coupling neutralizer
US6407717B2 (en) Printed circuit board-configured dipole array having matched impedance-coupled microstrip feed and parasitic elements for reducing sidelobes
US6054953A (en) Dual band antenna
EP0271458B1 (fr) Eléments d'antennes couplés électromagnétiquement à circuit imprimé multi-couches ayant des plaquettes ou des fentes couplées capacitivement à des conduites d'alimentation
EP0207029B1 (fr) Antennes microbandes à couplage électromagnétique alimentées par des microbandes couplées capacitivement aux lignes d'alimentation
US5070340A (en) Broadband microstrip-fed antenna
JP3093715B2 (ja) 共振器付着型マイクロストリップダイポールアンテナアレイ
US6329950B1 (en) Planar antenna comprising two joined conducting regions with coax
US6144344A (en) Antenna apparatus for base station
US6285326B1 (en) Patch antenna
JP2846081B2 (ja) トリプレート型平面アンテナ
US6052098A (en) Printed circuit board-configured dipole array having matched impedance-coupled microstrip feed and parasitic elements for reducing sidelobes
US6741210B2 (en) Dual band printed antenna
EP1038332B1 (fr) Antenne a double bande
JP2862265B2 (ja) 平面アンテナ
CA2142130A1 (fr) Antenne
US5559523A (en) Layered antenna
EP0414266B1 (fr) Antenne à microbandes avec plaque à fente
EP0542447A1 (fr) Antenne à plaque plane
JP3782278B2 (ja) 偏波共用アンテナのビーム幅制御方法
JP3002252B2 (ja) 平面アンテナ
EP0378905A1 (fr) Antenne microbande couplée par une fente et réseau d'antennes à commande de phase comportant de telles antennes
US5877729A (en) Wide-beam high gain base station communications antenna

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19900824

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB NL SE

17Q First examination report despatched

Effective date: 19930809

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL SE

REF Corresponds to:

Ref document number: 69023427

Country of ref document: DE

Date of ref document: 19951214

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010807

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010810

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010820

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010822

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20010830

Year of fee payment: 12

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020824

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020825

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030301

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030301

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020824

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030430

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20030301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST