EP2100348A1 - Hohlleiter-strahler, insbesondere für synthetik-apertur-radar-systeme - Google Patents
Hohlleiter-strahler, insbesondere für synthetik-apertur-radar-systemeInfo
- Publication number
- EP2100348A1 EP2100348A1 EP07856032A EP07856032A EP2100348A1 EP 2100348 A1 EP2100348 A1 EP 2100348A1 EP 07856032 A EP07856032 A EP 07856032A EP 07856032 A EP07856032 A EP 07856032A EP 2100348 A1 EP2100348 A1 EP 2100348A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- inner conductor
- radiator according
- winding
- slots
- 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
Links
Classifications
-
- 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
- H01Q21/0043—Slotted waveguides
-
- 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
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/22—Longitudinal slot in boundary wall of waveguide or transmission line
Definitions
- Waveguide radiators in particular for synthetic aperture radar systems
- the invention relates to a waveguide radiator, in particular for synthetic aperture radar systems, according to claim 1.
- Waveguide or array antenna radiators are used, for example, in phased array antennas of single and dual polarization synthetic aperture radar (SAR) systems. So far, so-called microstrip patch antennas or slotted waveguide antennas are used as emitters.
- the former show high electrical losses and can not be efficiently realized with their electric feed network in longer radiator lengths than approximately seven wavelengths (in the X-band approx. 20 cm).
- the latter require by their electrically resonant behavior a very high manufacturing accuracy and are only very expensive reproducible as a dual polarized radiator groups.
- waveguides with inner webs for vertical polarization or obliquely introduced wires for a horizontal polarization and complicated waveguide couplings are required.
- the object of the present invention is therefore to propose an efficient waveguide radiator, which can be implemented in a particularly cost-effective manner, in particular for SAR systems.
- An essential idea of the invention is to use as a radiator a slotted waveguide in which an additional inner conductor, a so-called barline is attached.
- This inner conductor is particular polarization-dependent specially shaped to excite all slots of the waveguide in phase.
- a layer of dielectric can be mounted in the waveguide, on the upper side of which the inner conductor is mounted, for example by gluing.
- a coupling can take place in the center of the radiator by a direct coaxial transition, in which the soul of a coupled coaxial cable is connected to the inner conductor.
- the group antenna emitter according to the invention is particularly well suited for phased array antennas of SAR systems with single and dual polarization, especially for emitters in satellite-based SAR systems with receive-only apertures such as HRWS (High Resolution Wide Swath) -SAR systems, possibly for radiators in C-band SAR systems such as Sentinel 1 and for radiators in X-band systems similar to TerraSAR / Tandem-X.
- HRWS High Resolution Wide Swath
- the invention has the advantage that, in contrast to conventional slotted waveguides, the propagation modes are no longer dispersive but correspond to those in coaxial lines, ie TEM modes. This can increase the bandwidth.
- the cross-sections of the waveguide can be significantly reduced in size, since there is no lower limit frequency (so-called cutoff) in TEM modes.
- Another advantage is that the resonance is independent of the cross-section, which means that manufacturing tolerances no longer adversely affect the electrical performance.
- the coupling can be carried out in the invention by a direct coaxial transition, which is mechanically very easy to implement, for example, by commercially available SMA panel sockets.
- the invention compared to microstrip patch antennas significantly longer radii lengths can be realized, for example up to about 80 cm in the X-band.
- the invention now relates, according to one embodiment, to a waveguide radiator, in particular for SAR systems
- a slotted waveguide having a plurality of slits mounted in the waveguide; and - an inner conductor in the waveguide mounted additional inner conductor which is polarization dependent shaped so that all slots of the waveguide can be excited in phase and amplitude equal.
- the slotted waveguide may be partially filled with a dielectric material on which the additional inner conductor is arranged.
- the additional inner conductor may have a tortuous shape. This has the advantage that in this way an adaptation of the propagation velocity in the longitudinal direction can be made and thus the phase curve on the inner conductor can be adapted to the distance of the slots, so that it is ensured by the tortuous shape that all slots of the slotted waveguide radiator be excited in phase.
- the additional inner conductor can also be asymmetrical. This offers an advantage in particular if the supply of the waveguide is offset from the center in the longitudinal direction. In this way, an arbitrary phase relationship between the left and right half of the waveguide can be adjusted, in particular an in-phase emission of a wave from all slots of the waveguide can be achieved.
- the slotted waveguide may have transverse slots, whereby the waveguide is formed to radiate horizontally polarized waves.
- a supply of the waveguide in the longitudinal extension direction may be arranged asymmetrically. This offers the advantage that such a supply of the waveguide defines two halves thereof, so that a signal conducted on the additional inner conductor can have a mutually different phase in the two waveguide halves. This allows adaptation of the radiation behavior of itself on the additional inner conductor from the feed in opposite directions advancing waves.
- the feed of the Holleiters is arranged in the same, that are defined by the feed two waveguide sections in which propagates a wave with a phase difference of about 180 ° relative to the center of the waveguide during operation of the waveguide. This allows all slits to be excited at the center frequency with the same phase, which can achieve the high purity of the radiation behavior of such a waveguide radiator.
- the additional inner conductor may also have a tortuous shape in another embodiment.
- the length and number of turns sections is adapted to the distance of the slots, so that there is always a fixed number of turn sections between successive slots.
- the winding shape in a winding section has a rotation angle phi h and a radius X h , in which
- mea wh is the transverse extent of a turn section and meai h is the length of a turn section of the additional inner conductor are defined.
- the additional inner conductor starting from a feed point arranged in a central region of the additional inner conductor, can have a plurality of identical winding sections in the direction of the waveguide ends. This additionally supports the in-phase excitation of the individual slots of the waveguide.
- a straight segment of the inner conductor can be arranged between the feed point and a first turn section of the inner conductor. This offers the advantage that, by providing such a short straight segment between the feed point and the first turn section of the inner conductor, a finely adjustable tuning of the phase response of a vibration on this section of the additional inner conductor is possible without correcting or adapting the geometry of the turn section to have to.
- the inner conductor in the region of one end of the waveguide may have a straight inner conductor segment as an open line termination.
- the electrical length of this line termination is dimensioned to one quarter of the line wavelength.
- the additional inner conductor has a feed point, which is arranged centrally in the slotted waveguide and symmetrically to the slots. This allows phase-synchronous excitation in longitudinal slots in the waveguide so that the individual slots radiate a wave in phase.
- the additional inner conductor may in a further embodiment have a winding shape with a plurality of winding sections. This makes it advantageous to perform an adaptation of the wavelength of a guided on the additional inner conductor waves to the distances of the individual slots. In addition, this can be achieved that an in-phase radiation of all slots is ensured.
- a winding portion may have a straight portion and a curved portion.
- the curved portion can bring about a transverse guidance of a wave propagating on the additional inner conductor in the area of the slots, so that an optimal radiation of an electromagnetic wave through the slot is ensured by the flow of current transversely to the slot length.
- the curved portion may have three curvature portions, of which a first and a third curvature portion each have a first and third radius of curvature xi and a first and third curvature angle phi 1v, respectively
- mea vw defines the transversal extent of the second curvature portion and mea dv the length of the three curvature portions of the additional inner conductor.
- a transversal expression of the first and third curvature section results, which is exactly half the size of the transversal expression of the second curvature section.
- the inner conductor in the region of one end of the waveguide may have an open line termination comprising a portion of a curved portion having a first curvature portion followed by a straight conductor segment and further followed by a second curvature portion and another straight inner conductor segment.
- an open line termination comprising a portion of a curved portion having a first curvature portion followed by a straight conductor segment and further followed by a second curvature portion and another straight inner conductor segment.
- a group antenna radiator has the following features: a first waveguide radiator, which is designed to output horizontally polarized waves during operation; and a second waveguide radiator configured to output vertically polarized waves during operation.
- first and second waveguide radiators may be longitudinally aligned with each other and have an equal length. This allows a TEM WeIIe be issued by the two waveguide radiators in a spatially small area, so that at a greater distance from the openings of the waveguide radiator is no longer directly recognizable that the TEM WeIIe of the two waveguide radiators was generated.
- the first waveguide radiator relative to the second waveguide radiator can be arranged offset horizontally and vertically.
- use parameters for the group antenna emitter can advantageously be varied or adapted, which result from the wavelength range used, for which the array antenna emitter is provided.
- an electrically conductive material may be disposed in the region created by the offset.
- a synthetic aperture (SAR) radar device in particular high-resolution synthetic aperture radar device, is provided which comprises a waveguide radiator according to the invention or a group antenna radiator.
- the SAR device may be an HRWS system.
- the array antenna radiator can be designed in particular as a radiator for a C-band SAR system such as Sentinel 1 and as a radiator for an X-band system similar to TerraSAR / Tandem-X.
- FIG. 1 is a view of a horizontal polarizing (HP) waveguide according to an embodiment of the present invention
- FIG. 2 shows an internal configuration of the HP waveguide shown in FIG. 1;
- FIG. 3 shows a cross section of an HP waveguide according to an exemplary embodiment of the present invention
- FIG. 4 shows a transverse slot distribution on an HP waveguide
- FIG. 5 shows an overview of the slot parameters on an HP waveguide
- Figure 6 shows asymmetries between the center and the first slot in each direction
- FIG. 7 shows a representation of the geometric parameters of the HP inner conductor design
- FIG. 8 is an illustration of a winding section of the HP inner conductor
- FIG. 10 shows an open line termination at the end of an inner conductor HP waveguide according to one exemplary embodiment of the present invention
- Figure 11 is a representation of the offset of an HP waveguide supply
- Figure 12 is an illustration of the cross section of a waveguide feed
- Figure 13 is an illustration of the plan view of the waveguide supply
- Figure 14 is a view of a vertical polarizing (VP) waveguide
- Figure 15 is an illustration of the internal structure of a VP waveguide
- Figure 16 is a cross-sectional view through a VP waveguide
- Figure 17 is an illustration of the slot distribution along a VP waveguide
- FIG. 18 is an overview of the slot parameters of a VP waveguide
- Figure 19 is a side view of the geometry of a waveguide feed
- Figure 20 is a plan view of the waveguide feed in the form of a coaxial feed
- Figure 21 is an illustration of a shape of an inner conductor in a VP waveguide
- FIG. 22 is an overview of the geometric parameters of an inner conductor design
- FIG. 23 shows an illustration of two first winding sections of an inner conductor VP waveguide
- Figure 24 is an illustration of an open line termination at the end of a VP waveguide
- Figure 25 is a view of an HP-VP waveguide as a group antenna emitter
- FIG. 26 is an overview of the geometric parameters of a dual-polarized radiator
- Figure 27 is a graph of the return loss in dB for a VP and an HP emitter
- FIG. 28 shows a graphical representation of a coupling behavior between VP and HP radiators in dB
- Figure 29 is a graphical representation of the directivity of an HP radiator in the azimuth far field.
- Figure 30 is a graphical representation of the directivity of a VP radiator in the azimuth far field.
- identical and / or functionally identical elements can be provided with the same reference numerals.
- the absolute values and dimensions given below are only exemplary values and do not limit the invention to such dimensions.
- TEM radiator a dual polarized microwave antenna radiator, called TEM radiator.
- the field of application is the planar phased array antennas as used in the aeronautical or aerospace synthetic aperture radar systems (SAR) as a radiating element.
- SAR aerospace synthetic aperture radar systems
- microstrip patch or slotted waveguide antennas are commonly used, although they have some disadvantages that can be overcome with this new radiator type.
- the required characteristics of the radiators are high electrical efficiency (low ohmic losses), sufficiently high bandwidth and cross-polar suppression. Additionally, for a flexible array antenna design, it is desirable to have emitters that are easily scalable in size.
- microstrip patch is a radiator that is relatively easy to manufacture, even though electrical performance is limited by high resistive losses, which are particularly pronounced for longer radiator lengths. Consequently, the use of microstrip patches is limited to applications with short phase centers that are required only for a high resolution operating mode (e.g., Spotlight mode).
- a high resolution operating mode e.g., Spotlight mode
- the slotted waveguide antenna is a highly efficient radiator used in some Ramfahrt SAR missions (eg X-SAR, SRTM, TerraSAR-X). Dual polarization capability is achieved by a parallel waveguide concept in which two separate waveguides, one for each linear polarization, are aligned side by side. Because of the resonance behavior, the application of these emitters to narrow band Applications limited. In addition, its production is very expensive, since very high mechanical precision is required and the geometry of the radiator is very complex. With the trend in modern SAR systems towards higher bandwidths and lower cost of ownership, the slotted waveguide is becoming less and less attractive for future SAR missions. Instead, alternative radiator designs are required that combine the electrical performance of the slotted waveguide (high efficiency and polarization purity) along with low production costs. For this purpose, the TEM emitter has been developed.
- the TEM emitter is an improvement on conventional slotted waveguide antennas. This improvement is achieved by adding an inner conductor (inner conductor, barline) into the waveguide, which is specially adapted for each polarization.
- the inner conductor changes the basic electrical behavior of the waveguide.
- the name "TEM emitter” comes from the electric modes that propagate in this waveguide, TEM means "transversal-electric-magnetic". A key feature of these fashions is that they are not dispersive.
- the TEM emitter differs from conventional slotted waveguides based on TE modes, which exhibit dispersive behavior and whose resonance is highly dependent on the cross section of the waveguide. Depending on the cutoff frequency of the waveguide (cutoff), the dispersion considerably limits the achievable bandwidth.
- the inner conductors in the TEM emitter can be easily produced by an etching or a milling process at very low cost.
- the waveguides can be made of aluminum with an attractive property, such that several radiators are grouped together in a block (tile concept).
- the detailed geometric configuration of TEM emitters is described below, starting with a separate description for each polarization (H / V poles). Then the configuration of the complete dual described polarized radiator. Finally, the measured electrical performance is shown.
- the design is exemplarily designed for a spotlight in the X-band (center frequency: 9.65 GHz) and a spotlight length of 400 mm.
- the radiator can be easily scaled to a different center frequency (eg C-band) or to other radiator lengths by changing the number of slots.
- FIG. 1 shows a general perspective of the horizontally polarized waveguide 10.
- the technique used in the design of an HP emitter follows the same principles as the VP emitter.
- the external shape of the waveguide 10 corresponds to that of the HP radiator in the Terra-SAR X.
- a coiled inner conductor 12 placed along a waveguide 10 on a dielectric layer is introduced (see FIG. 2).
- Cross section The basis for the HP radiator is a conventional rectangular waveguide 10 having dimensions a h , (wide wall width) and b h (narrow wall width) as shown in FIG. All walls have a thickness w and the length of the waveguide 10 is defined by I.
- the waveguide 10 is filled along its length with Eccostock Lok, a dielectric material with ⁇ r equal to 1.7.
- the height of the dielectric is parameterized by h dlh . - slot design
- transverse slots 14 In order to convert the rectangular waveguide 10 into a radiator, several transverse slots 14 have been cut into the top wall along the length of the waveguide 10 (see FIG. 4). A total of 16 slots 14 are placed symmetrically to the center of the waveguide 10, eight on each half of it. The distance d s ⁇ oth between the slots 14 is a line wavelength A. 9
- the geometry of the transverse slots 14 is shown in FIG. As shown, the slot width is defined by w s ⁇ ot h, and the slot 14 is cut in the lateral wall of the waveguide 10 in a length l ov .
- the inner conductor 12 in the HP waveguide is also not symmetrical. However, the asymmetries between the center of the waveguide 10 and the first slot 14 are set in each direction (see FIG. 6). That is, to simplify the design, we consider that the inner conductor 12 is symmetrical along both halves of the waveguide 10 from the first slot to the end of the inner conductor 12.
- FIG. 7 shows a more detailed picture of the winding shape as well as the parameters used.
- Figure 8 shows the winding section repeated along the whole waveguide, more specifically.
- Figure 9 shows a general case of two inner conductor sections of width m which must be connected by a turn section. The parameters required to construct the winding section are the center c or the radius R and the angle ⁇ to be rotated.
- two equal triangle legs (the side lengths m, m and 2 * a) can be defined in both straight line sections.
- the "connecting edge” (also
- the winding is repeated symmetrically along the waveguide 10 from the first slot 14.
- the inner conductor 12 is bounded on both sides with an open line termination 20 of length l stUb h, as shown in FIG. - Waveguide feeding design
- the feed 16 is not symmetrical in the longitudinal direction (z-axis), although the slots 14 are set symmetrically. It has been laid slightly to insert a phase of 180 ° between both halves of the waveguide 10. Thus, all slits 14 are excited with the same phase at the center frequency (see FIG. 11).
- a coaxial feed 16 (SMA socket) is inserted into the waveguide and the center conductor is connected to the inner conductor feed circuit by means of a bore for the inner coaxial conductor.
- the asymmetries in the inner conductor 12 are set between the center of the waveguide 10 and the first slit 14 in each direction.
- the feed 16 has been routed through oe d along the + z axis.
- the winding section is repeated along the waveguide 10 to the first slot 14 on the left and right of the feeding point 16. Because of the feed offset, one and a half turns are added to the right branch of the inner conductor 12 (-z-axis).
- FIG. 14 is a general view of a vertically polarized waveguide
- the inner structure with dielectric layer and inner conductor is shown in FIG.
- the waveguide 10 is partially filled with a dielectric and it radiates thanks to an inner conductor 12 which is set along the waveguide length, which excites the longitudinal slots 14 which have been milled into the waveguide.
- an inner conductor 12 which is set along the waveguide length, which excites the longitudinal slots 14 which have been milled into the waveguide.
- the basis for the VP radiator is an ordinary rectangular waveguide 10 with edges a v (width ready width) and b v (narrow wall width) as shown in FIG. All its walls have a thickness of w and the length of the waveguide 10 is defined by I.
- the waveguide 10 is filled along its length with Eccostock SH1, a dielectric material with ⁇ r equal to 1.04.
- the height of the dielectric is parameterized by h d iv.
- the electrical length between slots 14 is a line wavelength ⁇ g, therefore, the inner conductor parameters must be adjusted to obtain 360 degrees of phase difference between successive slots.
- the shape of the slot 14 is shown in FIG. The slot ends are rounded, as this facilitates the milling process.
- the radiator is powered by a coaxial feed 16 (SMA plug) placed in the middle of the waveguide 10, as shown in FIG.
- the radius of the coaxial screen, the coax dielectric and the coaxial inner conductor are r ⁇ ) r d ⁇ or r s .
- the feed 16 is inserted into the waveguide 10 with a height of the nut inside the waveguide h nu tv-
- the coaxial inner conductor is above the ladder in the amount of l SO ⁇ ev addition.
- FIG. 20 shows the plan view of the coaxial feed 16.
- Figure 21 shows a plan view thereof. It consists of a coiled conductor followed by a straight piece, which is repeated periodically along the length of the waveguide 10.
- the feeding point 16 is placed in the middle of the waveguide 10.
- the inner conductor 12 is symmetrical with respect to the supply and is terminated with an open line termination whose length must be adjusted.
- Figure 22 shows a more detailed picture of the winding shape as well as the parameters used for the design.
- the original Cartesian coordinates are placed exactly in the middle of the waveguide length and show where the coaxial feed 16 is going.
- the winding curves are designed to receive a current transversal to the slot 14. This transverse current excites the slot to radiate.
- the inner conductor 12 has a width of w bar v and a thickness of foarv
- the most difficult part of the design of the inner conductor 12 is the definition of the bent portions. For this, a suitable radius and a suitable center must be calculated in order to bring together both straight sections.
- the VP waveguide requires three bent sections. They are designated in FIG.
- the first (curvature) portion (1) also referred to by the reference numeral 30
- the last (third curvature) portion (3) also denoted by the reference numeral 30
- FIG. 25 shows a perspective view of the complete radiator. It can be seen how the VP waveguide and the HP waveguide of the same length I are aligned longitudinally (i.e., in the z direction). Both waveguides are displaced by an offset in the x and y directions.
- the HP waveguide is shifted upward in the y direction by a distance of offsethp. This is necessary to expose the part of the slots cut into the side wall of the HP waveguide.
- the adjustment is below -15dB at approximately 600 MHz centered at 9.65 GHz.
- Figure 28 shows the isolation between H and V polarization. Sufficiently good values result, which are far below the typical required values (for example ⁇ -40 dB).
Landscapes
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006057144A DE102006057144B4 (de) | 2006-12-01 | 2006-12-01 | Hohlleiter-Strahler |
| PCT/DE2007/002139 WO2008064655A1 (de) | 2006-12-01 | 2007-11-27 | Hohlleiter-strahler, insbesondere für synthetik-apertur-radar-systeme |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2100348A1 true EP2100348A1 (de) | 2009-09-16 |
| EP2100348B1 EP2100348B1 (de) | 2016-08-31 |
Family
ID=39218009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07856032.3A Active EP2100348B1 (de) | 2006-12-01 | 2007-11-27 | Hohlleiter-strahler, insbesondere für synthetik-apertur-radar-systeme |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8493275B2 (de) |
| EP (1) | EP2100348B1 (de) |
| CA (1) | CA2671118C (de) |
| DE (1) | DE102006057144B4 (de) |
| ES (1) | ES2594157T3 (de) |
| IL (1) | IL199000A (de) |
| WO (1) | WO2008064655A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011001569A1 (de) | 2011-03-25 | 2012-09-27 | Technische Universität Carolo-Wilhelmina Zu Braunschweig | Verfahren und Anordnung zum Modellieren von Antennen-Abstrahlcharakeristiken |
| EP2587586B1 (de) * | 2011-10-26 | 2017-01-04 | Alcatel Lucent | Verteiltes Antennensystem und Verfahren zur Herstellung eines verteilten Antennensystems |
| RU2504873C1 (ru) * | 2012-05-03 | 2014-01-20 | Открытое акционерное общество "Научно-производственное объединение "Лианозовский электромеханический завод" | Резонансная волноводно-щелевая антенна |
| DE102013012315B4 (de) * | 2013-07-25 | 2018-05-24 | Airbus Defence and Space GmbH | Hohlleiter-Strahler. Gruppenantennen-Strahler und Synthetik-Apertur-Radar-System |
| EP3656017B1 (de) * | 2017-08-04 | 2025-10-08 | Huawei Technologies Co., Ltd. | Mehrbandantenne |
| JP6533560B2 (ja) | 2017-09-21 | 2019-06-19 | 株式会社フジクラ | アンテナ装置 |
| JP6752394B2 (ja) | 2018-05-02 | 2020-09-09 | 三菱電機株式会社 | 導波管スロットアレーアンテナ |
| CN110867644B (zh) * | 2019-11-11 | 2021-01-19 | 中国电子科技集团公司第十四研究所 | 一种双频段多极化共口径同轴波导缝隙天线 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2914766A (en) * | 1955-06-06 | 1959-11-24 | Sanders Associates Inc | Three conductor planar antenna |
| US3524189A (en) * | 1966-11-09 | 1970-08-11 | Us Army | Slotted waveguide antenna array providing dual frequency operation |
| US4409595A (en) * | 1980-05-06 | 1983-10-11 | Ford Aerospace & Communications Corporation | Stripline slot array |
| FR2555823B1 (fr) * | 1982-03-26 | 1987-07-17 | Thomson Csf | Dispositif d'excitation d'une fente non excentree taillee sur le grand cote d'un guide d'onde et antenne a fentes comportant un tel dispositif |
| US5422649A (en) * | 1993-04-28 | 1995-06-06 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Parallel and series FED microstrip array with high efficiency and low cross polarization |
| SE510082C2 (sv) * | 1993-11-30 | 1999-04-19 | Saab Ericsson Space Ab | Vågledarantenn med tvärgående och längsgående slitsar |
| US5619216A (en) * | 1995-06-06 | 1997-04-08 | Hughes Missile Systems Company | Dual polarization common aperture array formed by waveguide-fed, planar slot array and linear short backfire array |
| JPH09270633A (ja) * | 1996-03-29 | 1997-10-14 | Hitachi Ltd | Temスロットアレイアンテナ |
| US5914694A (en) * | 1996-09-19 | 1999-06-22 | Cal Corporation | Dual-band, dual polarization radiating structure |
| DE10126469A1 (de) * | 2001-05-31 | 2002-12-12 | Eads Deutschland Gmbh | Schlitzstrahlerelement |
-
2006
- 2006-12-01 DE DE102006057144A patent/DE102006057144B4/de not_active Expired - Fee Related
-
2007
- 2007-11-27 EP EP07856032.3A patent/EP2100348B1/de active Active
- 2007-11-27 CA CA2671118A patent/CA2671118C/en active Active
- 2007-11-27 ES ES07856032.3T patent/ES2594157T3/es active Active
- 2007-11-27 US US12/516,996 patent/US8493275B2/en active Active
- 2007-11-27 WO PCT/DE2007/002139 patent/WO2008064655A1/de not_active Ceased
-
2009
- 2009-05-27 IL IL199000A patent/IL199000A/en active IP Right Grant
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008064655A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US8493275B2 (en) | 2013-07-23 |
| IL199000A0 (en) | 2010-02-17 |
| EP2100348B1 (de) | 2016-08-31 |
| DE102006057144B4 (de) | 2013-10-17 |
| CA2671118C (en) | 2015-11-24 |
| IL199000A (en) | 2016-02-29 |
| WO2008064655A1 (de) | 2008-06-05 |
| US20100066623A1 (en) | 2010-03-18 |
| CA2671118A1 (en) | 2008-06-05 |
| DE102006057144A1 (de) | 2008-07-31 |
| ES2594157T3 (es) | 2016-12-16 |
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