EP0257881A2 - Slotted waveguide antenna and array - Google Patents

Slotted waveguide antenna and array Download PDF

Info

Publication number
EP0257881A2
EP0257881A2 EP87306986A EP87306986A EP0257881A2 EP 0257881 A2 EP0257881 A2 EP 0257881A2 EP 87306986 A EP87306986 A EP 87306986A EP 87306986 A EP87306986 A EP 87306986A EP 0257881 A2 EP0257881 A2 EP 0257881A2
Authority
EP
European Patent Office
Prior art keywords
slot
slotted waveguide
waveguide antenna
waveguide
radiator
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.)
Withdrawn
Application number
EP87306986A
Other languages
German (de)
French (fr)
Other versions
EP0257881A3 (en
Inventor
Lye Whatt Chua
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.)
Decca Ltd
Original Assignee
Decca Ltd
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 Decca Ltd filed Critical Decca Ltd
Publication of EP0257881A2 publication Critical patent/EP0257881A2/en
Publication of EP0257881A3 publication Critical patent/EP0257881A3/en
Withdrawn legal-status Critical Current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
    • 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
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H01Q13/0233—Horns fed by a slotted waveguide array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0037—Particular feeding systems linear waveguide fed arrays

Definitions

  • This invention relates to slotted waveguide antennas and arrays and in particular to slotted waveguide antennas and arrays for use in microwave radars antennas and arrays.
  • the degree of coupling depends upon both the current density, associated with the boundary current sheet that is interrupted by the slot, and the component of the length of the slot transverse to the lines of current.
  • a narrow slot cut along the centre of the broad face of a rectangular waveguide will constitute a non-radiating element since it lies substantially within a region of zero current density, whereas, when such a narrow slot is oriented at an angle to the waveguide axis it perturbs the current sheet and constitutes a radiating element.
  • the level of the unwanted side lobes is, for instance, critically dependent on such accuracy of alignment.
  • a slotted waveguide antenna comprises a hollow waveguide, an aperture defining a narrow slot in the waveguide, a Vivaldi horn type radiator and energy coupling means for coupling energy in the waveguide through the slot to the radiator.
  • the Vivaldi horn type radiator is a substantially planar slot-line aerial with constant beamwidth an theoretically unlimited instantaneous frequency bandwidth: more importantly, the radiated wave from a Vivaldi horn type radiator is linearly polarised in the plane of the aerial.
  • the detailed structure and function of the Vivaldi horn type radiator is already known: for instance, reference may be made to UK-A-1601441 or to "The Vivaldi Aerial" (P.J. Gibson) pp101-105: Proc .9th EU M.C., Brighton, 1979.
  • the Vivaldi horn type radiator comprises a diverging slot line conductor pair on a dielectric constant, e.g. fibre glass, substrate.
  • the radiation mechanism can be generally understood to be a non-resonant travelling wave, the energy of which is gradually coupled to the radiation field as the separation between the slot line conductors increases. Further, the diverging slot-line structure provides the required gradual impedance match from that at the feeding portion of slot line to the free space impedance of 377 Ohms.
  • Vivaldi horn type radiator with a slotted waveguide thus entirely obviates the need for spurious mode suppression devices commonly used with inclined slot type antennas. Further, the requirement for both accurate alignment and, for non-resonant slots, accurate sizing, is also greatly reduced.
  • a slotted waveguide antenna comprises a hollow waveguide, an aperture defining a narrow slot in the waveguide, a Vivaldi horn type radiator and energy coupling means for coupling energy in the waveguide through the slot to the radiator and wherein the waveguide is a hollow rectangular waveguide and the slot is a non- radiating, longitudinal slot, parallel to the waveguide axis.
  • FIG. 1 a portion of a hollow rectangular waveguide 1 is shown having a narrow longitudinal slot 2 positioned such that its long axis lies along the centre of one broad wall and is, therefore, parallel to the waveguide axis. It will be apparent that such a slot constitutes a non-radiating element for the dominant TE10mode.
  • the probe 3 is a substantially planar possible lithographically printed probe having a one or both surfaces bounded by a dielectric constant substrate 10 and forming a portion of a conductor of a strip transmission line 4.
  • the substrate 10 may be extended to supportively contact the internal surface of the waveguide on a side facing the slot.
  • a further advantage to sandwiching the probe 3 between dielectric layers 10 is that the antenna can be operated at relatively high power levels: for instance, at X-band, transmitter peak power levels in excess of 35 KW are possible.
  • a probe may be inserted through the wall of the waveguide substantially adjacent to the slot in order to sufficiently perturb the internal current sheet to couple energy from an otherwise non-radiating slot.
  • the Vivaldi horn type radiator shown generally at 5, has a slot line, feed portion 7 terminating in a first section of slot line 8 which is coplanar but perpendicular to the feed portion 8.
  • the length of the first section 8 is ⁇ g /4 so that it constitutes an effective short circuit element.
  • Lying parallel and below the first section 8 is an end section 9 of strip transmission line, also of length ⁇ g /4 but constituting an effective open circuit element: a dielectric medium 10, in this embodiment also serving as the high dielectric constant substrae of the Vivaldi horn type radiator 5, separates first section 8 from end section 9.
  • These two sections comprise the transition element required to twist the E-field vector from perpendicular to parallel to the xy plane.
  • the alignment of the E-field vector can be readily reversed by changing the orientation of the transition element, comprising sections 8 and 9.
  • the energy coupling means comprises a co-axial probe forming a portion of a co-axial transmission line, and a co-axial/slot transition element for coupling energy from the co-axial transmission line to the slot line of the Vivaldi type horn radiator.
  • the Vivaldi horn type radiator further comprises a symmetrical pair of diverging slot line conductors 12 and 14, defining the required exponential taper.
  • a further Vivaldi horn type radiator 5 may be positioned parallel to a first radiator, the pair being positioned equidistantly from the line defining the long axis of the slot.
  • Such a symmetrical arrangement constitutes a balanced, as opposed to an unbalanced, radiator.
  • the balanced arrangement generates a beam which is symmetrical about the xy plane, whereas a single radiator generates a tilted beam: the latter may, however, be advantageously utilised in, for instance, the reduction of sea clutter.
  • the balanced arrangement has a lower loss of radiation at the transition element but may be more complex to manufacture.
  • the beam pattern in the plane perpendicular to the xy plane is principally controlled by metal flares, the edge of one of which is indicated at 17.
  • the antenna incorporates flanges 15, bounding both outer long sides of the slot, and having a width of ⁇ g /4 to constitute an effective open circuit elements. Consequently, the ground lane current associated with the ground plane of strip transmission line 4 is inhibited from circulating on the outside walls of the waveguide 1: the Vivaldi horn type radiator 5 is, therefore, electrically isolated from the waveguide.
  • a radiation input 20 feeds the waveguide 1 from one end.
  • a further advantage to this arrangement is the cancelling of the unwanted residual radiation of adjacent transmission elements near the axis of radiation.
  • different probes 3 each have a predetermined extent of penetration into the waveguide 1 in order to provide a required amplitude taper across the width of the radiation profile. It will be apparent that the length of the array determines the beamwidth of the antenna array, and, consequently, the gain of the array.
  • a matched termination 21 is provided for the waveguide.
  • a radiation input 20 feeds the centre of a wavegude 1.
  • the strip transmission line 4 associated with each Vivaldi radiator to the right of the input 20 is extended by an extra ⁇ g /4 at portion 18.

Abstract

An antenna is formed with a hollow waveguide (1) having a narrow slot (2) in one face. A Vivaldi horn type radiator (5) is mounted with a coupling arrangement (3, 4) to couple energy in the waveguide through the slot to the radiator. The slot can be a non-radiating longitudinal slot, parallel to the waveguide axis, and several radiators may be mounted in a non-resonant slot along the length of the waveguide to form a linear resonant array.

Description

  • This invention relates to slotted waveguide antennas and arrays and in particular to slotted waveguide antennas and arrays for use in microwave radars antennas and arrays.
  • It is a well known technique to cut slots into a waveguide wall in order to couple the internal field to space and constitute thereby an antenna: generally, the degree of coupling depends upon both the current density, associated with the boundary current sheet that is interrupted by the slot, and the component of the length of the slot transverse to the lines of current.
  • Consequently, a narrow slot cut along the centre of the broad face of a rectangular waveguide will constitute a non-radiating element since it lies substantially within a region of zero current density, whereas, when such a narrow slot is oriented at an angle to the waveguide axis it perturbs the current sheet and constitutes a radiating element.
  • It is also a well known technique to cut a series of radiating slots in a waveguide to form an antenna array. Commonly, inclined slots are cut in the narrow wall of a hollow rectangular waveguide when an array having a direction of polarisation of radiation that is parallel to the waveguide axis is desired. Such arrays, however, generate an unwanted component, orthogonal to the desired mode. Although, especially for small tilt angles, the proportion of power associated with unwanted modes compared to total radiated power is not large, it has nevertheless been found necessary to incorporate specific means for supressing the unwanted mode: electrically conducting strips or wires positioned at the array aperture to be parrallel to the E-field of the spurious mode are commonly used for this purpose.
  • A further problem with the inclined slot type of design is the necessity of accurately machining the slot to the desired angle of inclination: for instance, for a slot cut in the narrow face of a rectangular waveguide and inclined at an angle 0 to the normal to the waveguide axis, the slot conductance obeys the relation g = go Cos² ϑ: this results in the necessity of aligning slots to an accuracy of 0.1 degrees. The level of the unwanted side lobes is, for instance, critically dependent on such accuracy of alignment.
  • A further problem with known arrays is associated with the practise of utilising resonant slots: this requires the perimeter of any slot to be substantially equal to the wavelength of radiation utilised and imposes further demands on the accuracy required in machining the slot.
  • In accordance with the present invention, a slotted waveguide antenna comprises a hollow waveguide, an aperture defining a narrow slot in the waveguide, a Vivaldi horn type radiator and energy coupling means for coupling energy in the waveguide through the slot to the radiator.
  • The Vivaldi horn type radiator is a substantially planar slot-line aerial with constant beamwidth an theoretically unlimited instantaneous frequency bandwidth: more importantly, the radiated wave from a Vivaldi horn type radiator is linearly polarised in the plane of the aerial. The detailed structure and function of the Vivaldi horn type radiator is already known: for instance, reference may be made to UK-A-1601441 or to "The Vivaldi Aerial" (P.J. Gibson) pp101-105: Proc .9th EU M.C., Brighton, 1979. In general terms, however, the Vivaldi horn type radiator comprises a diverging slot line conductor pair on a dielectric constant, e.g. fibre glass, substrate.
  • The general form of the taper is given by
    [Y]² = K exp (MX) + C
    where the x-axis is colinear with the axis of the radiator and directed towards the mouth of the radiator; C depends on the impedance of the feeding portion of slot line; and K and M are constants depending, respectively, on the length of the taper and the dielectric constant of the substrate.
  • The radiation mechanism can be generally understood to be a non-resonant travelling wave, the energy of which is gradually coupled to the radiation field as the separation between the slot line conductors increases. Further, the diverging slot-line structure provides the required gradual impedance match from that at the feeding portion of slot line to the free space impedance of 377 Ohms.
  • The use of a Vivaldi horn type radiator with a slotted waveguide thus entirely obviates the need for spurious mode suppression devices commonly used with inclined slot type antennas. Further, the requirement for both accurate alignment and, for non-resonant slots, accurate sizing, is also greatly reduced.
  • According to further features of the invention a slotted waveguide antenna comprises a hollow waveguide, an aperture defining a narrow slot in the waveguide, a Vivaldi horn type radiator and energy coupling means for coupling energy in the waveguide through the slot to the radiator and wherein the waveguide is a hollow rectangular waveguide and the slot is a non- radiating, longitudinal slot, parallel to the waveguide axis.
  • Embodiments of the invention will now be described with reference to the accompanying drawings in which:-
    • Figure 1 is a perspective view of a slotted waveguide antenna and array in accordance with the present invention,
    • Figure 2 is a cross-sectional view through a slotted waveguide antenna in accordance with the present invention and depiciting a balanced configuration of Vivaldi horn type radiators,
    • Figure 3 is a schematic plan view of a slotted waveguide array in accordance with the present invention and depicting an end fed configuration,
    • and Figure 4 is a plan view as in Figure 3 but depicting a centre fed configuration.
  • In Figure 1, a portion of a hollow rectangular waveguide 1 is shown having a narrow longitudinal slot 2 positioned such that its long axis lies along the centre of one broad wall and is, therefore, parallel to the waveguide axis. It will be apparent that such a slot constitutes a non-radiating element for the dominant TE₁₀mode.
  • Consequently, a probe 3, extending through the slot 2 and into the interior of the waveguide is utilised to couple energy from the interior: it will be appreciated that the extent of coupling is dependent on the extent of penetration. The probe 3 is a substantially planar possible lithographically printed probe having a one or both surfaces bounded by a dielectric constant substrate 10 and forming a portion of a conductor of a strip transmission line 4. The substrate 10 may be extended to supportively contact the internal surface of the waveguide on a side facing the slot. A further advantage to sandwiching the probe 3 between dielectric layers 10 is that the antenna can be operated at relatively high power levels: for instance, at X-band, transmitter peak power levels in excess of 35 KW are possible. Alternatively, a probe may be inserted through the wall of the waveguide substantially adjacent to the slot in order to sufficiently perturb the internal current sheet to couple energy from an otherwise non-radiating slot.
  • The Vivaldi horn type radiator, shown generally at 5, has a slot line, feed portion 7 terminating in a first section of slot line 8 which is coplanar but perpendicular to the feed portion 8. The length of the first section 8 is λg/4 so that it constitutes an effective short circuit element. Lying parallel and below the first section 8 is an end section 9 of strip transmission line, also of length λg/4 but constituting an effective open circuit element: a dielectric medium 10, in this embodiment also serving as the high dielectric constant substrae of the Vivaldi horn type radiator 5, separates first section 8 from end section 9. These two sections comprise the transition element required to twist the E-field vector from perpendicular to parallel to the xy plane. The alignment of the E-field vector can be readily reversed by changing the orientation of the transition element, comprising sections 8 and 9.
  • In an alternative embodiment (not shown) the energy coupling means comprises a co-axial probe forming a portion of a co-axial transmission line, and a co-axial/slot transition element for coupling energy from the co-axial transmission line to the slot line of the Vivaldi type horn radiator.
  • The Vivaldi horn type radiator further comprises a symmetrical pair of diverging slot line conductors 12 and 14, defining the required exponential taper.
  • Referring now to Figure 2, a further Vivaldi horn type radiator 5 may be positioned parallel to a first radiator, the pair being positioned equidistantly from the line defining the long axis of the slot.
  • Such a symmetrical arrangement constitutes a balanced, as opposed to an unbalanced, radiator. The balanced arrangement generates a beam which is symmetrical about the xy plane, whereas a single radiator generates a tilted beam: the latter may, however, be advantageously utilised in, for instance, the reduction of sea clutter. Further, the balanced arrangement has a lower loss of radiation at the transition element but may be more complex to manufacture.
  • In addition, the beam pattern in the plane perpendicular to the xy plane is principally controlled by metal flares, the edge of one of which is indicated at 17.
  • In addition, the antenna incorporates flanges 15, bounding both outer long sides of the slot, and having a width of λg/4 to constitute an effective open circuit elements. Consequently, the ground lane current associated with the ground plane of strip transmission line 4 is inhibited from circulating on the outside walls of the waveguide 1: the Vivaldi horn type radiator 5 is, therefore, electrically isolated from the waveguide.
  • In Figure 3, six adjacent Vivaldi horn type radiators are depicted, each being associated with a non-resonant slot (not shown), the mid-point of adjacent slots being λg/2 apart. This arrangement constitutes, therefore, a linear, resonant array.
  • A radiation input 20 feeds the waveguide 1 from one end. In addition, the orientation of the transition elements, each comprising a section 8 and 9, alternates for adjacent Vivaldi radiators 5 in order to maintain a uniform phase front in the radiation field. A further advantage to this arrangement is the cancelling of the unwanted residual radiation of adjacent transmission elements near the axis of radiation.
  • Further, different probes 3 each have a predetermined extent of penetration into the waveguide 1 in order to provide a required amplitude taper across the width of the radiation profile. It will be apparent that the length of the array determines the beamwidth of the antenna array, and, consequently, the gain of the array. In addition , a matched termination 21 is provided for the waveguide.
  • In Figure 5, a radiation input 20 feeds the centre of a wavegude 1. The portions of waveguide to the left and right of the input 20 are offset such that L₁ - L₂ = λg/4. Consequently, conjugate impedance matching is achieved. However, in order to maintain a uniform phase front in the radiation field, the strip transmission line 4 associated with each Vivaldi radiator to the right of the input 20 is extended by an extra λg/4 at portion 18.

Claims (18)

1. A slotted waveguide antenna comprising a hollow waveguide, an aperture defining a narrow slot in the waveguide, a Vivaldi horn type radiator and energy coupling means for coupling energy in the waveguide through the slot to the radiator.
2. A slotted waveguide antenna as claimed in Claim 1 wherein the waveguide is a hollow rectangular waveguide.
3. A slotted waveguide antenna as claimed in any preceding claim wherein the narrow slot is a longitudinal slot parallel to the waveguide axis.
4. A slotted waveguide antenna as claimed in any preceding claim wherein the narrow slot is positioned to constitute a non-radiating slot.
5. A slotted waveguide antenna as claimed in Claim 4 wherein the energy coupling means comprises a probe for insertion through the slot.
6. A slotted waveguide antenna as claimed in Claim 4 wherein the energy coupling means comprises a probe for insertion through the wall of the waveguide substantially adjacent to the slot.
7. A slotted waveguide antenna as claimed in Claim 5 wherein the energy coupling means comprises a substantially planar printed probe; a dielectric constant substrate bounding at least one of the surfaces of the printed probe, the probe forming a portion of a conductor of a strip transmission line, and a strip/slot transition element for coupling energy from the strip transmission line to the slot line of the Vivaldi type horn radiator.
8. A slotted waveguide antenna as claimed in Claim 5 wherein the energy coupling means comprises a co-axial probe forming a portion of a co-axial transmission line, and a co-axial/slot transition element for coupling energy from the co-axial transmission line to the slot line of the Vivaldi-type horn radiator.
9. A slotted waveguide antenna as claimed in Claim 7 wherein the transition element comprises a first section of slot line, coplanar and perpendicular to a feed section of slot line, the axis of the feed section being co-linear with the axis of the associated Vivaldi type horn radiator, and wherein the length of the first section is λg/4 to constitute an effective short circuit element; and an end section of the strip transmission line, parallel with the said first section of slot line and separated from it by a portion of a dielectric medium, and wherein the length of the end section is λg/4 to constitute an effective open circuit element.
10. A slotted waveguide antenna as claimed in Claim 9 wherein the said end section is orientated with respect to the slot line feed to provide an emitted wave of required spatial phase sense.
11. A slotted waveguide antenna as claimed in Claim 8 wherein the probe has a predetermined extent of penetration into the waveguide to provide a required magnitude of coupling of energy to the associated Vivaldi type horn radiator.
12. A slotted waveguide antenna as claimed in any preceding claim wherein a flange of width λg/4 bounds both outer long sides of the slot to constitute effective open circuit elements.
13. A slotted waveguide antenna as claimed in any preceding claim wherein the coupling means supportively contacts the internal surface of the waveguide on a side facing the said slot.
14. A slotted waveguide antenna as claimed in any preceding claim comprising a further Vivaldi horn type radiator positioned parallel to said first radiator, the pair being positioned equidstantly from the line defining the long axis of the slot.
15. A slotted waveguide antenna array comprising a plurality of slotted waveguide antennas as claimed in any preceeding claim, wherein the midpoint of adjacent slots are a distance λg/2 apart.
16. A slotted waveguide antenna array as claimed in Claim 15 wherein the array is an end-fed array.
17. A slotted waveguide antenna array as claimed in Claim 15 wherein the array is a centre-fed array.
18. A slotted waveguide antenna array as claimed in Claims 17 or 18 wherein different probes each have a predetermined extent of penetration into the waveguide to provide a required amplitude taper across the width of the radiation profile.
EP87306986A 1986-08-29 1987-08-06 Slotted waveguide antenna and array Withdrawn EP0257881A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8620882A GB2194681B (en) 1986-08-29 1986-08-29 Slotted waveguide antenna and array
GB8620882 1986-08-29

Publications (2)

Publication Number Publication Date
EP0257881A2 true EP0257881A2 (en) 1988-03-02
EP0257881A3 EP0257881A3 (en) 1989-09-20

Family

ID=10603370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87306986A Withdrawn EP0257881A3 (en) 1986-08-29 1987-08-06 Slotted waveguide antenna and array

Country Status (4)

Country Link
EP (1) EP0257881A3 (en)
JP (1) JPS63100804A (en)
KR (1) KR880003452A (en)
GB (1) GB2194681B (en)

Cited By (19)

* 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
EP0401978A2 (en) * 1989-06-09 1990-12-12 The Marconi Company Limited Antenna arrangement
DE3941125A1 (en) * 1989-12-13 1991-06-20 Telefunken Systemtechnik Double-sided notch antenna for missiles and guided shells - has two fibre-reinforced teflon (RT<) plates held together by screws and having two etched tapered slots on two outside faces
US5070340A (en) * 1989-07-06 1991-12-03 Ball Corporation Broadband microstrip-fed antenna
US5081466A (en) * 1990-05-04 1992-01-14 Motorola, Inc. Tapered notch antenna
EP0477102A1 (en) * 1990-09-21 1992-03-25 Societe Technique D'application Et De Recherche Electronique Directional network with adjacent radiator elements for radio communication system and unit with such a directional network
FR2753568A1 (en) * 1996-09-19 1998-03-20 Dassault Electronique VERSATILE NETWORK ANTENNA
EP1251587A1 (en) * 2001-04-17 2002-10-23 Lucent Technologies Inc. Broadband antenna structure
WO2010117491A2 (en) * 2009-04-06 2010-10-14 Sheng Peng Wideband high gain antenna
WO2010129967A1 (en) * 2009-04-06 2010-11-11 Sheng Peng Wideband high gain 3g or 4g antenna
WO2018063627A1 (en) * 2016-09-27 2018-04-05 Intel Corporation Waveguide connector with tapered slot launcher
KR101864070B1 (en) * 2017-03-02 2018-06-01 국방과학연구소 Hybrid horn antenna fed by vivaldi
WO2018111211A1 (en) * 2016-12-16 2018-06-21 Aselsan Elektroni̇k Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ A monopulse radar antenna system
KR101890363B1 (en) * 2017-08-22 2018-08-21 국방과학연구소 Antenna apparatus
US10256521B2 (en) 2016-09-29 2019-04-09 Intel Corporation Waveguide connector with slot launcher
CN112038759A (en) * 2020-09-23 2020-12-04 中国航空工业集团公司雷华电子技术研究所 Ultra-wideband multi-channel integrated horn antenna
CN113258280A (en) * 2021-05-12 2021-08-13 长春理工大学 Ka-band claw-shaped broadband opposite extension Vivaldi antenna
US11309619B2 (en) 2016-09-23 2022-04-19 Intel Corporation Waveguide coupling systems and methods
US11394094B2 (en) 2016-09-30 2022-07-19 Intel Corporation Waveguide connector having a curved array of waveguides configured to connect a package to excitation elements

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023623A (en) * 1989-12-21 1991-06-11 Hughes Aircraft Company Dual mode antenna apparatus having slotted waveguide and broadband arrays
WO1997015094A1 (en) * 1995-10-19 1997-04-24 Boris Iosifovich Sukhovetsky Wideband antenna array
US6822615B2 (en) * 2003-02-25 2004-11-23 Raytheon Company Wideband 2-D electronically scanned array with compact CTS feed and MEMS phase shifters
US6677899B1 (en) * 2003-02-25 2004-01-13 Raytheon Company Low cost 2-D electronically scanned array with compact CTS feed and MEMS phase shifters
FR2868610A1 (en) * 2004-04-06 2005-10-07 Thomson Licensing Sa IMPROVEMENT TO SLOT-TYPE PLANAR ANTENNAS
US7057563B2 (en) * 2004-05-28 2006-06-06 Raytheon Company Radiator structures
KR100834422B1 (en) * 2007-05-31 2008-06-04 한국전자통신연구원 Probe
KR102358474B1 (en) * 2021-01-29 2022-02-08 홍익대학교 산학협력단 Vivaldi antenna device having pyramid shaped conductor wing
CN113571865B (en) * 2021-07-28 2023-05-30 中国电子科技集团公司第三十八研究所 Banyan antenna limited array

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176300A (en) * 1964-01-24 1965-03-30 Avco Corp Adjustable slotted wave guide radiator with coupling element
GB1142787A (en) * 1965-08-16 1969-02-12 Marconi Co Ltd Improvements in or relating to aerial systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB507473A (en) * 1936-09-15 1939-06-14 Otto Bormann Improvements in or relating to coupling devices for use in the production, amplification or reception of ultra-short waves
NL73349C (en) * 1941-11-28
GB1601441A (en) * 1978-03-10 1981-10-28 Philips Electronic Associated Antenna
DE3241890A1 (en) * 1982-11-12 1984-05-17 kabelmetal electro GmbH, 3000 Hannover POLARIZING SWITCH WITH FINE HORN

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176300A (en) * 1964-01-24 1965-03-30 Avco Corp Adjustable slotted wave guide radiator with coupling element
GB1142787A (en) * 1965-08-16 1969-02-12 Marconi Co Ltd Improvements in or relating to aerial systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANS. ON MICROWAVE THEORY AND TECHNICS vol. MTT-27, no. 9, September 1979, New York, US; V.M- PANDHARIPANDE et al. "Equivalent circuit of a narrow-wall waveguide slot coupler" *

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343322A2 (en) * 1988-05-23 1989-11-29 Ball Corporation Notch antenna with microstrip feed
EP0343322A3 (en) * 1988-05-23 1990-06-13 Ball Corporation Notch antenna with microstrip feed
US4853704A (en) * 1988-05-23 1989-08-01 Ball Corporation Notch antenna with microstrip feed
GB2232821B (en) * 1989-06-09 1994-01-12 Marconi Co Ltd Antenna arrangement
EP0401978A2 (en) * 1989-06-09 1990-12-12 The Marconi Company Limited Antenna arrangement
GB2232821A (en) * 1989-06-09 1990-12-19 Marconi Co Ltd Antenna arrangement
EP0401978A3 (en) * 1989-06-09 1991-07-24 The Marconi Company Limited Antenna arrangement
US5036335A (en) * 1989-06-09 1991-07-30 The Marconi Company Limited Tapered slot antenna with balun slot line and stripline feed
US5070340A (en) * 1989-07-06 1991-12-03 Ball Corporation Broadband microstrip-fed antenna
DE3941125C2 (en) * 1989-12-13 2001-02-22 Daimlerchrysler Aerospace Ag Planar broadband antenna
DE3941125A1 (en) * 1989-12-13 1991-06-20 Telefunken Systemtechnik Double-sided notch antenna for missiles and guided shells - has two fibre-reinforced teflon (RT<) plates held together by screws and having two etched tapered slots on two outside faces
US5081466A (en) * 1990-05-04 1992-01-14 Motorola, Inc. Tapered notch antenna
EP0477102A1 (en) * 1990-09-21 1992-03-25 Societe Technique D'application Et De Recherche Electronique Directional network with adjacent radiator elements for radio communication system and unit with such a directional network
FR2667198A1 (en) * 1990-09-21 1992-03-27 Applic Rech Electro Ste DIRECTIVE NETWORK FOR RADIOCOMMUNICATIONS, WITH ADJACENT RADIANT ELEMENTS, AND SET OF SUCH DIRECTIVE NETWORKS.
US5202698A (en) * 1990-09-21 1993-04-13 Societe Technique D'application Et De Recherche Electronique Directional radiocommunication array
FR2753568A1 (en) * 1996-09-19 1998-03-20 Dassault Electronique VERSATILE NETWORK ANTENNA
EP0831550A1 (en) * 1996-09-19 1998-03-25 Dassault Electronique Versatile array antenna
EP1251587A1 (en) * 2001-04-17 2002-10-23 Lucent Technologies Inc. Broadband antenna structure
US6538614B2 (en) 2001-04-17 2003-03-25 Lucent Technologies Inc. Broadband antenna structure
WO2010129967A1 (en) * 2009-04-06 2010-11-11 Sheng Peng Wideband high gain 3g or 4g antenna
WO2010117491A3 (en) * 2009-04-06 2011-01-13 Sheng Peng Wideband high gain antenna
WO2010117491A2 (en) * 2009-04-06 2010-10-14 Sheng Peng Wideband high gain antenna
US11309619B2 (en) 2016-09-23 2022-04-19 Intel Corporation Waveguide coupling systems and methods
WO2018063627A1 (en) * 2016-09-27 2018-04-05 Intel Corporation Waveguide connector with tapered slot launcher
US10566672B2 (en) 2016-09-27 2020-02-18 Intel Corporation Waveguide connector with tapered slot launcher
US10256521B2 (en) 2016-09-29 2019-04-09 Intel Corporation Waveguide connector with slot launcher
US11394094B2 (en) 2016-09-30 2022-07-19 Intel Corporation Waveguide connector having a curved array of waveguides configured to connect a package to excitation elements
WO2018111211A1 (en) * 2016-12-16 2018-06-21 Aselsan Elektroni̇k Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ A monopulse radar antenna system
KR101864070B1 (en) * 2017-03-02 2018-06-01 국방과학연구소 Hybrid horn antenna fed by vivaldi
KR101890363B1 (en) * 2017-08-22 2018-08-21 국방과학연구소 Antenna apparatus
CN112038759A (en) * 2020-09-23 2020-12-04 中国航空工业集团公司雷华电子技术研究所 Ultra-wideband multi-channel integrated horn antenna
CN113258280A (en) * 2021-05-12 2021-08-13 长春理工大学 Ka-band claw-shaped broadband opposite extension Vivaldi antenna
CN113258280B (en) * 2021-05-12 2022-07-08 长春理工大学 Ka wave band broadband opposite extension Vivaldi antenna based on claw-shaped groove

Also Published As

Publication number Publication date
JPS63100804A (en) 1988-05-02
GB2194681B (en) 1990-04-18
EP0257881A3 (en) 1989-09-20
GB8620882D0 (en) 1987-01-14
GB2194681A (en) 1988-03-09
KR880003452A (en) 1988-05-17

Similar Documents

Publication Publication Date Title
EP0257881A2 (en) Slotted waveguide antenna and array
EP0447218B1 (en) Plural frequency patch antenna assembly
US5070340A (en) Broadband microstrip-fed antenna
US5359338A (en) Linear conformal antenna array for scanning near end-fire in one direction
US4755820A (en) Antenna device
US6424298B1 (en) Microstrip array antenna
US5675345A (en) Compact antenna with folded substrate
US4843403A (en) Broadband notch antenna
US5008681A (en) Microstrip antenna with parasitic elements
EP0456680B1 (en) Antenna arrays
US2914766A (en) Three conductor planar antenna
US4839663A (en) Dual polarized slot-dipole radiating element
EP0531800A1 (en) Asymmetrically flared notch radiator
EP0565051B1 (en) Wideband arrayable planar radiator
EP0455493A2 (en) Tapered notch antenna
US4833482A (en) Circularly polarized microstrip antenna array
JPH0671171B2 (en) Wideband antenna
US5717410A (en) Omnidirectional slot antenna
US3987454A (en) Log-periodic longitudinal slot antenna array excited by a waveguide with a conductive ridge
US6087988A (en) In-line CP patch radiator
EP0349069A1 (en) Dual polarised phased array antenna
GB2169453A (en) Radio frequency antenna system
US4260988A (en) Stripline antenna for microwaves
EP0493014A1 (en) Patch antenna
US4507664A (en) Dielectric image waveguide antenna array

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE GB IT

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900321

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CHUA, LYE WHATT