EP1425822A2 - Breitbandige schlitzantenne und deren herstellungsverfahren und konfiguration - Google Patents

Breitbandige schlitzantenne und deren herstellungsverfahren und konfiguration

Info

Publication number
EP1425822A2
EP1425822A2 EP02757580A EP02757580A EP1425822A2 EP 1425822 A2 EP1425822 A2 EP 1425822A2 EP 02757580 A EP02757580 A EP 02757580A EP 02757580 A EP02757580 A EP 02757580A EP 1425822 A2 EP1425822 A2 EP 1425822A2
Authority
EP
European Patent Office
Prior art keywords
slot
balun
slot portion
conductive
layers
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.)
Granted
Application number
EP02757580A
Other languages
English (en)
French (fr)
Other versions
EP1425822B1 (de
Inventor
James M. Ii Irion
Nicholas A. Schuneman
Richard E. Hodges
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.)
Raytheon Co
Original Assignee
Raytheon Co
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
Priority claimed from US10/023,800 external-priority patent/US6850203B1/en
Priority claimed from US10/023,229 external-priority patent/US6867742B1/en
Priority claimed from US10/022,753 external-priority patent/US6963312B2/en
Application filed by Raytheon Co filed Critical Raytheon Co
Publication of EP1425822A2 publication Critical patent/EP1425822A2/de
Application granted granted Critical
Publication of EP1425822B1 publication Critical patent/EP1425822B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H01Q13/085—Slot-line radiating ends
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line

Definitions

  • a tapered slot antenna element One type of antenna element that has been found to work well in an array antenna is often referred to as a tapered slot antenna element.
  • the spacing between antenna elements in an array antenna is typically determined by the frequency at which the antenna operates, and a tapered slot antenna element fits comfortably within the space available for an antenna element in many array antennas.
  • FIGURE 15 is a flowchart which summarizes an optimization technique used in designing the apparatus of FIGURE 1;
  • FIGURE 16 is a diagrammatic front view of an antenna element which is an alternative embodiment of the antenna element of FIGURE 1;
  • FIGURE 17 is a diagrammatic perspective view of an antenna element which is still another alternative embodiment of the antenna element of FIGURE 1;
  • the width dimension 39 should be as large as possible within these stated constraints.
  • the size of the array must progressively decrease, because the space available for each antenna element is approximately one-half of the wavelength of the highest frequency of operation.
  • the maximum amount of space available for the width dimension 39 of the balun portion 36 also progressively decreases.
  • the width dimension 39 is about 5% longer than the length dimension 38, but is not 50% to 70% longer, due to space limitations imposed by the operational frequency range of the antenna system.
  • FIGURE 5 is a graph showing the shape of one edge of the slot portion 37, where the horizontal axis represents the centerline of the slot, from the end at the balun portion 36 to the end at the radome 13.
  • the vertical axis in FIGURE 5 represents the half-width of the slot, or in other words, the distance from the edge of the slot to the centerline.
  • the edges of the slot portion 37 are mirror images of each other with respect to the centerline of the slot, and therefore only one of these edges is depicted in the graph of FIGURE 5.
  • the direct connection between the ground plane 28A and an end of the stripline 67 represents an electrical termination of that end of the stripline 67. Since the stripline 67 terminates directly into the groundplane 28, reactances are minimized where the stripline 67 extends across the slot portion 47, in comparison to pre-existing devices where the stripline is coupled by a via to a groundplane on the opposite side of a dielectric layer, or where the stripline terminates into some form of standalone termination structure designed to produce a standing wave resonance.
  • a plurality of vias extend through both of the dielectric layers 17 and 18 at a number of different locations, so as to electrically couple all three of the ground planes 26-28. Three of these vias are identified with reference numerals 76, 77 and 78.
  • the embodiment of FIGURE 1 has portions of the dielectric layers 17 and 18 which are disposed within the slot, and the dielectric layers have impedance characteristics that vary with frequency, even for a given width.
  • the impedance characteristic would vary with width but not frequency, because the impedance of air does not vary with frequency.
  • the theoretical transmission line can be modeled as a two-port element of the type discussed earlier, and its characteristics can thus can be represented by an [ABCD] matrix.
  • the [ABCD] matrix for a particular lossless ideal segment would be defined as follows:
  • the antenna element 12 of the antenna element 12 As mentioned above, the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of the antenna element 12 of
  • an evaluation is made of whether the optimum shape has been found. This determination involves use of performance criteria of the type discussed above. Further, it depends on the extent to which the Nelder-Mead techniques discussed above have reached a point where a variety of different slot shapes have been evaluated and it appears that the optimum shape is likely to be a shape that has already been evaluated, rather than a shape that has yet been evaluated. In general, a number of slot shapes will be evaluated before a decision is made at block 316 that the optimum slot shape has been identified.
  • the two dielectric layers and the bond film of the antenna element 412 each extend outwardly beyond the ends of the three ground planes, one of the dielectric layers being visible at 417, and one of the ground planes being visible at 426.
  • the upper and lower side edges of the antenna element 412 each have plating which extends from the left end of the antenna element to the right ends of the ground planes. This edge plating does not extend the rest of the way to the right end of the antenna element 412.
  • a sheath 569 of an electrically conductive material extends completely around the dielectric layers 563 and 564. As mentioned above, the sheath 569 is physically and electrically coupled to the metal plate 514 in FIGURE 17 by a conductive epoxy adhesive of a known type, which is not separately shown in the drawings.
  • the inner edge of the balun hole is conductive, for example due to the provision of plating, because it helps to increase the bandwidth of the balun hole by containing electrical fields to the hole.
  • the conductive edge of the hole prevents electric fields from extending into the dielectric material around the hole.
  • balun hole is used with a slot having a shape that has been optimized using techniques according to the invention.
  • the balun hole is inductive and the slot is capacitive.
  • the optimization technique is used to achieve conjugate matching of the balun hole and slot, they cooperate to provide good performance even at low frequencies, in a manner somewhat analogous to resonance in a tuned RLC circuit.
  • they can provide a decade (10:1) bandwidth capable of a ⁇ 60° E-plane and ⁇ 50° H-plane scan volume.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP02757580A 2001-09-04 2002-09-04 Breitbandige schlitzantenne und deren herstellungsverfahren und konfiguration Expired - Lifetime EP1425822B1 (de)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US31741001P 2001-09-04 2001-09-04
US317410P 2001-09-04
US23800 2001-12-14
US10/023,800 US6850203B1 (en) 2001-09-04 2001-12-14 Decade band tapered slot antenna, and method of making same
US10/023,229 US6867742B1 (en) 2001-09-04 2001-12-14 Balun and groundplanes for decade band tapered slot antenna, and method of making same
US10/022,753 US6963312B2 (en) 2001-09-04 2001-12-14 Slot for decade band tapered slot antenna, and method of making and configuring same
US22753 2001-12-14
US23229 2001-12-14
PCT/US2002/028108 WO2003021715A2 (en) 2001-09-04 2002-09-04 Decade band tapered slot antenna, and methods of making and configuring same

Publications (2)

Publication Number Publication Date
EP1425822A2 true EP1425822A2 (de) 2004-06-09
EP1425822B1 EP1425822B1 (de) 2006-10-04

Family

ID=27487140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02757580A Expired - Lifetime EP1425822B1 (de) 2001-09-04 2002-09-04 Breitbandige schlitzantenne und deren herstellungsverfahren und konfiguration

Country Status (7)

Country Link
EP (1) EP1425822B1 (de)
AT (1) ATE341842T1 (de)
AU (1) AU2002323588A1 (de)
DE (1) DE60215204T2 (de)
ES (1) ES2274073T3 (de)
IL (2) IL160680A0 (de)
WO (1) WO2003021715A2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016109419A1 (en) * 2014-12-30 2016-07-07 Google Inc. Modified vivaldi antenna with dipole excitation mode
WO2021030758A1 (en) 2019-08-14 2021-02-18 Compass Technology Group Llc Flat lens antenna

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8564491B2 (en) * 2008-04-05 2013-10-22 Sheng Peng Wideband high gain antenna
WO2010129967A1 (en) * 2009-04-06 2010-11-11 Sheng Peng Wideband high gain 3g or 4g antenna

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853704A (en) * 1988-05-23 1989-08-01 Ball Corporation Notch antenna with microstrip feed
US6008770A (en) * 1996-06-24 1999-12-28 Ricoh Company, Ltd. Planar antenna and antenna array

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03021715A3 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016109419A1 (en) * 2014-12-30 2016-07-07 Google Inc. Modified vivaldi antenna with dipole excitation mode
US9577330B2 (en) 2014-12-30 2017-02-21 Google Inc. Modified Vivaldi antenna with dipole excitation mode
WO2021030758A1 (en) 2019-08-14 2021-02-18 Compass Technology Group Llc Flat lens antenna
EP4014279A4 (de) * 2019-08-14 2023-08-16 Compass Technology Group LLC Flachlinsenantenne
US11973270B2 (en) 2019-08-14 2024-04-30 Compass Technology Group Llc Flat lens antenna

Also Published As

Publication number Publication date
DE60215204T2 (de) 2007-01-18
DE60215204D1 (de) 2006-11-16
ATE341842T1 (de) 2006-10-15
WO2003021715A2 (en) 2003-03-13
WO2003021715A3 (en) 2003-08-28
IL160680A0 (en) 2004-08-31
AU2002323588A1 (en) 2003-03-18
IL160680A (en) 2009-12-24
ES2274073T3 (es) 2007-05-16
EP1425822B1 (de) 2006-10-04

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