EP3175509A1 - Antenne log-periodique a large bande de frequences - Google Patents
Antenne log-periodique a large bande de frequencesInfo
- Publication number
- EP3175509A1 EP3175509A1 EP15745187.3A EP15745187A EP3175509A1 EP 3175509 A1 EP3175509 A1 EP 3175509A1 EP 15745187 A EP15745187 A EP 15745187A EP 3175509 A1 EP3175509 A1 EP 3175509A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiating
- log
- radiating elements
- dipole
- elements
- 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
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/10—Logperiodic antennas
- H01Q11/105—Logperiodic antennas using a dielectric support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/085—Flexible aerials; Whip aerials with a resilient base
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/10—Logperiodic antennas
-
- 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
- H01Q21/062—Two dimensional planar arrays using dipole aerials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
- H01Q3/04—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation
Definitions
- the invention relates to a broadband antenna and, more particularly, a broadband frequency log-periodic antenna.
- Maintaining the radio characteristics of antennas over a wide frequency band is a constant concern in the field of communications. This is the case, for example, of maintaining a constant illumination over a wide frequency band.
- Various configurations are known from the prior art for maintaining a constant illumination over a wide frequency band. These configurations include, for example, traveling wave antennas (Vivaldi antennas, grooved waveguides, etc.), reflector antennas, antenna arrays with phase and phase processing circuits. amplitude of the signals transmitted / received by the antenna, etc. The width of the frequency bands can then reach several decades.
- traveling wave antennas Vivaldi antennas, grooved waveguides, etc.
- reflector antennas amplitude of the signals transmitted / received by the antenna, etc.
- the width of the frequency bands can then reach several decades.
- the invention does not have this disadvantage.
- the invention relates to a log-periodic antenna which comprises at least one set of three log-periodic patterned radiating elements and a substrate which defines an electric mass of the antenna, the radiating elements having a log-periodic pattern.
- each log-periodic pattern radiating element comprises a succession of radiating dipoles distributed on either side of a rectilinear electrically conductive line, perpendicular to said line, the dipoles.
- radiators having an increasing dimension between a first end of said line and a second end of said line located closer to the first face than the first end, a first radiating element having a rectilinear electrically conductive line substantially perpendicular to the first face of the substrate, a second radiating element and a third radiating element being located on either side of the first radiating element, symmetrically to the first radiating element, the first ends of the electrically conducting lines of the different radiating elements being separated from each other and sensibl aligned in a direction parallel to the first face, the rectilinear electrically conducting lines of the second and third radiating elements being located in the same plane as the straight electrically conductive line of the first radiating element and being inclined with respect to the electrically conductive line of the first radiating element such that the first ends of the rectilinear electrically conductive lines of the second and third radiating elements are closer than the second ends of the rectilinear electrically conductive lines of said second and third radiating elements, the radiating dipoles of the
- the distance between the smaller radiating dipole of the second radiating element and the smaller radiating dipole of the first radiating element and the distance between the smaller radiating dipole of the third radiating element and the smaller radiating dipole; of the first radiating element are substantially between 0.6 AHF and 0.7 AHF, where AHF is a wavelength of a high frequency wave radiated by the log-periodic antenna, and
- the distance between the larger radiating dipole of the second radiating element and the larger radiating dipole of the first radiating element and the distance between the larger radiating dipole of the third radiating element and the larger radiating dipole; of the first radiating element are substantially between 0.6 ABF and 0.7 ABF, where ABF is a wavelength of a low frequency wave radiated by the log periodic antenna.
- each radiating element consists of a flat dielectric substrate on which the log-periodic patterns are printed on either side of the flat dielectric substrate.
- each plane radiating element comprises six radiating dipoles positioned between the first end and the second end, the six radiating dipoles being arranged such that, starting from the first end:
- a first radiating dipole has first and second tracks of length L x ⁇ 5 , L being the length of the first and second tracks of the sixth radiating dipole and ⁇ being a coefficient of less than 1;
- a second radiating dipole located at a distance D x ⁇ 4 from the first dipole has first and second tracks of length L x ⁇ 4 ;
- a third radiated dipole located at a distance D x ⁇ 3 of the second dipole has first and second tracks of length L x ⁇ 3 ;
- a fourth radiating dipole located at a distance D x ⁇ 2 from the third dipole has first and second tracks of length L x ⁇ 2 ;
- a fifth radiating dipole located at a distance D x ⁇ from the fourth dipole has first and second tracks of length L x ⁇ ;
- the sixth radiating dipole which has first and second tracks of length L is situated at a distance D from the fifth dipole.
- the flat dielectric substrate has a thickness of 0.8 mm and a relative dielectric constant equal to 3, the width of the first and second tracks of the different radiating dipoles is equal to 5 mm, the magnitudes L and D are respectively equal to 70mm and 15.77mm and the coefficient ⁇ is equal to 0.824.
- the log-periodic antenna comprises means for supplying the first ends of the electrically conductive lines of the different radiating elements with electromagnetic waves whose electric field vectors have a direction parallel to the axis. radiating dipoles.
- the means for supplying the first ends of the electrically conductive lines comprise a power divider fixed on the electrically conductive face of the substrate which is opposite to the face above which the radiating elements are located.
- the log-periodic antenna comprises at least two sets of three radiating elements and the radiating dipoles of the three radiating elements of the same set of three radiating elements are substantially perpendicular to the plane which contains the rectilinear electrically conductive lines of the three radiating elements
- the first faces of the substrates which define the electrical masses of the log periodic antennas are situated in the same plane
- the planes which contain the rectilinear electrically conducting lines of the different sets of three radiating elements are parallel to each other and the straight electrically conductive lines of the first radiating elements of the different sets of three radiating elements are located in the same plane.
- the log-periodic antenna comprises at least two sets of three radiating elements and the radiating dipoles of the three radiating elements of the same set of radiating elements are in the plane which contains the lines electrically rectilinear conductors of the three radiating elements
- the first faces of the substrates which define the electrical masses of the log-periodic antennas are located in the same plane
- the planes which contain the rectilinear electrically conducting lines of the different sets of three radiating elements are parallel to each other and the rectilinear electrically conducting lines of the first radiating elements of the different sets of three radiating elements are located in the same plane.
- the electrically conductive substrates which define the electrical masses of two adjacent log-periodic antennas are electrically connected to each other by an extensible metal mesh allowing two sets of three radiating elements to be moved away or brought closer together neighbors.
- FIG. 1 represents an example of a radiating element that participates in a broadband log-periodic antenna of the invention
- FIGS. 2A and 2B show, respectively, a perspective view and a side view of an example of a broadband log-periodic antenna according to a first embodiment of the invention
- FIGS 3A and 3B show mirror radiating elements used in an advantageous configuration of the first embodiment of the invention
- FIG. 4 represents a profile view of an example of a broadband log-periodic antenna equipped with a power divider, according to the first embodiment of the invention
- FIGS. 5A and 5B show, respectively, a profile view and an exploded perspective view of the power divider shown in FIG. 4;
- FIG. 6 shows an improvement of the broadband log-periodic antenna of the invention shown in Figure 4;
- FIG. 7 represents an example of networking of a plurality of broadband log-periodic antennas according to the first embodiment of the invention;
- FIG. 8 represents a perspective view of an exemplary broadband log-periodic antenna according to a second embodiment of the invention.
- FIG. 9 represents an example of networking of a plurality of broadband log-periodic antennas according to the second embodiment of the invention.
- FIG. 1 represents an example of a radiating element that participates in the broadband log-periodic antenna of the invention.
- the radiating element consists of an electrically conductive log-periodic pattern 1 printed symmetrically on the two opposite sides of a flat dielectric substrate 2.
- FIG. 1 is a view from above of a face of the dielectric substrate 2.
- the printed log-periodic pattern comprises, by way of non-limiting example, six Bi-Be arms distributed on either side of a central rectilinear track R. Bi arms - Be are perpendicular to the track
- two arms located opposite one another, on either side of the dielectric substrate 2 constitute a radiating dipole.
- the arms Bi - Be are distributed across the track R between a first end EXi and a second end EX 2 of the track R, opposite the first end. From the first end to the second end of the R track, it comes:
- a fourth arm B 4 of length LXT 2 located on the side of the track opposite the first side, at a distance equal to D x ⁇ 2 of the third arm,
- a fifth arm B5 of length L X T located on the first side of the track, at a distance equal to D x ⁇ of the fourth arm, and a sixth arm Be of length L located on the side of the track opposite to the first side.
- the arm B6 which has the greatest length is preferably folded in order to limit the interaction of the radiating element with the ground plane on which the radiating element is positioned (see FIGS. 2A and 2B).
- the track R has, for example, a width U equal to 1.5 mm.
- the radiating element is optimized, for example, in the 2GHz - 4GHz frequency band.
- the dielectric substrate 2 has, for example, a thickness equal to 0.8 mm and, for example, a relative dielectric constant ⁇ ⁇ equal to 3.
- the scale factor ⁇ is preferably between 0.7 and 0.9.
- I l is, for example, equal to 0.824.
- the quantity D is equal to 15.77 mm and the quantity L is equal to 70 mm.
- the widths of the Bi-Be arms are respectively equal to W xr 7 ' 5 , W x ⁇ 6 , W x ⁇ 4 ' 5 , W x ⁇ 3 , W x ⁇ 1 - 5 and W, the magnitude W being equal, for example, to 5 mm.
- the width V of the dielectric substrate 2 is such that:
- V U + 2 X L X T
- Figs. 2A and 2B show respectively a perspective view and a side view of a broadband log-periodic antenna according to the first embodiment of the invention.
- the broadband log-periodic antenna comprises three radiating elements E 1 , E 2 , E 3 situated above a first face of a plane electrically conductive substrate 3 which defines the electrical mass of the antenna.
- the substrates of the radiating elements E 1 and E 3 are situated on either side of the substrate of the radiating element E 2 , symmetrically with the substrate of the radiating element E 2 .
- the central rectilinear track R 2 of the central radiating element E 2 is perpendicular to the first face of the electrically conductive substrate 3.
- the three radiating elements are connected so that the rectilinear tracks R 1, R 2 and R 3 of the three elements radiating are located in the same plane P which is the plane H of the radiating elements.
- the plane H of an antenna is, by definition, the plane which contains the direction of propagation of the wave radiated by the antenna and the direction of the magnetic field of the antenna. radiated wave.
- the plane E of an antenna is the plane which contains the direction of propagation of the wave radiated by the antenna and the direction of the electric field of the radiated wave.
- the first ends of the central rectilinear tracks R 1 , R 2 and R 3 are separated from each other and substantially aligned in a plane parallel to the electrically conductive substrate 3, the first ends of the rectilinear tracks R 1 and R 3 being closer to one of the other than are the second ends of these same tracks.
- the three radiating elements E 1 , E 2 and E 3 are connected, at the first ends of the respective tracks R 1, R 2 and R 3, to the three respective coaxial cables K 1 , K 2 , K 3 .
- the core and the electrically conductive sheath of a coaxial cable are electrically connected to the printed patterns which are located respectively on either side of the dielectric substrate of a radiating element.
- the electrically conductive sheath is welded to the printed pattern of a first face of the radiating element, while the core is brought into electrical contact with the pattern printed on the other face, for example by welding. Drilling of the dielectric substrate is therefore performed at the first end of the track of each radiating element to allow the passage of the core of the coaxial.
- An electrically conductive rectangular patch may be added to the interface between the printed pattern on the first face and the sheath of the coaxial cable, in order to promote electrical contact.
- the coaxial cables K 1 and K 3 are mounted outside the space between the radiating elements E 1 and E 3 and the coaxial cable K 2 is positioned between the radiating elements E 2 and E 3 .
- FIG. 3A represents a view from above of the log-periodic pattern of the radiating elements E 2 and E 3 which is electrically connected to the core of the respective coaxial cables K 2 and K 3
- FIG. 3B represents the top view of the pattern log-periodic of the radiating element Ei which is also connected to the core of the coaxial cable Ki.
- each of the radiating elements Ei, E3 of the central element E 2 is governed by the ratio of the distances between the active areas of the radiating elements, which ratio is inversely proportional to the ratio of the operating frequencies. He comes :
- the emission zone Zi of a radiating element is located on the dipoles of large size while, for the operation of the antenna system at the highest frequencies , the emission zone Z 2 is located on the small dipoles.
- the emission zone is therefore different depending on whether the transmission frequency is higher or lower.
- the distance DBF which separates the two emission zones Zi from two neighboring radiating elements is substantially equal to 0.65ABF and the distance DHF which separates the two emission zones Z 2 from two neighboring elements is substantially equal to 0.65AHF, the quantities ABF and AHF being respectively the wavelength in n the vacuum corresponding to the lowest transmission frequency emitted by the antenna system and the wavelength in the vacuum corresponding to the highest transmission frequency transmitted by the antenna system. It is an advantage of the invention to provide a space-saving structure.
- the useful frequency band is between 2GHz and 4GHz.
- the distance DBF between the emission zones Zi of two neighboring radiating elements is then written:
- the distance separating the radiating elements from the ground plane is also chosen to ensure proper operation of the antenna.
- the distance separating the radiating element E 2 from the ground plane 3 is between 2 mm and 5 mm.
- FIG. 4 represents a profile view of a broadband antenna of the invention equipped with a power divider.
- FIGS. 5A and 5B show, respectively, a profile view and an exploded perspective view of the power divider shown in FIG. 4.
- the power divider is attached to the substrate 3 and is designed in the air to ensure high power withstand.
- the invention also relates to other embodiments for which the power divider is not formed in the air and / or is not fixed on the substrate 3.
- the power divider consists of a copper pattern 6 placed opposite a ground plane 7.
- the power divider delivers three electromagnetic waves in phase from an electromagnetic wave that it receives on its input.
- the three outputs of the power divider are connected to the respective coaxial cables K 1 , K 2 , K 3 .
- the input of the power divider 6 is connected, via a coaxial cable KA, to a source that emits the electromagnetic wave to radiate (source not shown in the figures).
- the lengths of the cables K 1 , K 2 , K 3 are adjusted so that the waves received by the radiating elements are in phase.
- Metallic studs 4, 5 fix the copper pattern 6 and the ground plane 7 which constitute the power divider on the face of the ground plane 3 which is opposite to the first face.
- the electromagnetic waves which feeds the first ends of conductive lines Ri, R 2, R 3 are in phase and come from the same source .
- the result is an antenna radiation pattern whose axis of the main lobe is aligned along the conductive line R 2 .
- the first ends of the conductive lines Ri, R 2 , R 3 are powered by electromagnetic waves, the phases of which may vary independently of one another.
- the result is an antenna radiation pattern whose axis of the main lobe varies as a function of the phase differences existing between the phases of the electromagnetic waves which feed the conductive lines R 1, R 2 , R 3.
- Figure 6 shows an improvement of the antenna system according to the invention.
- the system of FIG. 6 comprises two metal deflectors Di, D 2 fixed on the ground plane 3.
- the deflectors Di, D 2 are positioned on either side of the radiating central element E 2. They achieve better electromagnetic insulation of the radiating elements between them.
- the adaptation of the antenna system is improved, which leads to an improvement of the gain of the antenna.
- FIG. 7 represents an example of networking of a plurality of broadband log-periodic antennas according to the first embodiment of the invention.
- the broadband log-periodic antenna according to the first embodiment of the invention ensures the maintenance of a constant radiation only in the plane H of the radiating elements that constitute it.
- Figure 7 illustrates the networking of a plurality of broadband antennas in the plane E of the radiating elements.
- the antenna resulting from this networking advantageously retains a constant radiation not only in the plane H, but also in the plane E.
- the antenna represented in FIG. 7 consists, by way of nonlimiting example, of four broadband log-periodic antennas A 1 , A 2 , A 3 , A 4 conforming to FIG. the antenna shown in FIG. 6.
- the electrically conductive substrates 3 of the different antennas Ai-A 4 are located in the same plane Q.
- the radiating dipoles of the central radiating elements E 2 of the different antennas Ai-A 4 are also located in a same plane perpendicular to the plane Q. and which is the plane E of the central radiating elements E 2 .
- the same distance ⁇ separates the central rectilinear tracks R 2 from two adjacent central radiating elements E 2 .
- the distance ⁇ is chosen according to the frequency of operation of the antenna.
- mobile supports (not shown in the figure) make it possible to bring the log-periodic antennas Ai-A 4 closer to or away from each other.
- This modification of the distance ⁇ advantageously makes it possible to guarantee a constant illumination of the antenna which results from the combination of the four elementary antennas Ai-A 4 , that is to say an invariant angle of the half-power opening. of the main lobe radiated by the antenna.
- the distance ⁇ is equal to 135 mm for a transmission frequency equal to 2 GHz and 67.5 mm for a transmission frequency equal to 4 GHz.
- This mesh makes it possible to define a continuity of the electrical mass.
- I l is able to expand or retract according to changes in the distance ⁇ .
- the size of an elementary cell is much less than one tenth of the wavelength of the radiated wave so that the electrically conductive substrates 3 and the metal mesh M constitute, for the radiated wave by the antenna, an electrically continuous ground plane.
- FIG. 8 represents a view from above of an example of a broadband log-periodic antenna according to a second embodiment of the invention.
- the log periodic patterns of the three radiating elements E 1 , E 2 , E 3 are printed symmetrically on the two opposite faces of the same flat dielectric substrate 4 which is parallel to the plane E of the elements radiant.
- the material constituting the flat dielectric substrate 4 has, for example, a relative dielectric constant equal to 3 and a thickness equal to 0.8 mm.
- the radiating element E 2 is central with respect to the two other radiating elements E 1 and E 3 .
- the rectilinear track R 2 of the radiating element E 2 is perpendicular to the electrically conductive substrate 3.
- the rectilinear tracks R 1 and R 3 of the respective radiating elements E 1 and E 3 are arranged on either side of the rectilinear track R 2 , symmetrically to the rectilinear track R 2 .
- the first ends of the rectilinear tracks R 1, R 2 and R 3 are substantially aligned along a line parallel to the electrically conductive substrate 3.
- the rectilinear tracks R 1 and R 3 of the respective radiating elements E 1 and E 3 are inclined with respect to the track R 2 of the central radiating element E 2 and the first ends of the rectilinear tracks R 1 and R 3 are closer to one another than are the second ends of these tracks .
- the previous DBF and DHF distances given for the first embodiment of the invention are also valid for the second embodiment.
- the radiating elements E 1 , E 2 , E 3 are connected to an electromagnetic wave source via coaxial cables and a power divider (not shown in the figure). Like the first embodiment of the invention, the radiating elements E 1 , E 2 , E 3 are connected to the coaxial cables at the first ends of the respective tracks R 1, R 2 , R 3 and the flat dielectric substrate 4 is fixed. to the electrically conductive substrate 3 via the coaxial cables. The substrate 4 is then held in position thanks to the rigidity of the coaxial cables. The dielectric substrate 4 is substantially perpendicular to the conductive substrate 3. The distance separating the dielectric substrate 4 from the electrically conductive substrate 3 is, for example, between 2 mm and 5 mm. As in the first embodiment of the invention, the waves radiated by the different radiating elements are in phase. The log periodic patterns of the different radiating elements are arranged accordingly.
- FIG. 9 represents an example of networking of a plurality of broadband log-periodic antennas according to the second embodiment of the invention.
- the dielectric substrates 4 of the different log-periodic antennas are parallel to one another, two neighboring dielectric substrates being separated from one and the same distance ⁇ .
- the distance ⁇ is chosen according to the frequency of operation of the antenna.
- means are provided for bringing the different electrically conductive substrates 3 closer together or away.
- an extensible electrically conductive mesh M is provided between the different substrates 3. This mesh allows advantageously to define a continuity of the electrical mass. Whatever the extension of the mesh M, the size of an elementary cell is much less than one tenth of the wavelength of the wave radiated by the antenna.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1457419A FR3024595B1 (fr) | 2014-07-31 | 2014-07-31 | Antenne log-periodique a large bande de frequences |
| PCT/EP2015/067490 WO2016016361A1 (fr) | 2014-07-31 | 2015-07-30 | Antenne log-periodique a large bande de frequences |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3175509A1 true EP3175509A1 (fr) | 2017-06-07 |
| EP3175509B1 EP3175509B1 (fr) | 2023-07-19 |
Family
ID=51987253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15745187.3A Active EP3175509B1 (fr) | 2014-07-31 | 2015-07-30 | Antenne log-periodique a large bande de frequences |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10177456B2 (fr) |
| EP (1) | EP3175509B1 (fr) |
| FR (1) | FR3024595B1 (fr) |
| WO (1) | WO2016016361A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10892796B1 (en) * | 2020-03-20 | 2021-01-12 | Rockwell Collins, Inc. | UWB spread spectrum power spatial combining antenna array |
| CN114447605B (zh) * | 2020-11-06 | 2025-10-24 | 华为技术有限公司 | 多频段融合天线组件 |
| CN113488781B (zh) * | 2021-06-09 | 2023-07-28 | 上海铂联通信技术有限公司 | 一种适用于多种环境下的测向天线系统 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3249946A (en) * | 1963-03-25 | 1966-05-03 | Martin Marietta Corp | Frequency independent antenna array with constant phase center spacing |
| US4198639A (en) * | 1978-12-26 | 1980-04-15 | Cubic Corporation | Parabolic and log periodic antennas combined for compact high-gain broadband antenna system |
| US5917455A (en) * | 1996-11-13 | 1999-06-29 | Allen Telecom Inc. | Electrically variable beam tilt antenna |
| US6094176A (en) * | 1998-11-24 | 2000-07-25 | Northrop Grumman Corporation | Very compact and broadband planar log-periodic dipole array antenna |
| US6677913B2 (en) * | 2001-06-19 | 2004-01-13 | The Regents Of The University Of California | Log-periodic antenna |
| US20060202900A1 (en) * | 2005-03-08 | 2006-09-14 | Ems Technologies, Inc. | Capacitively coupled log periodic dipole antenna |
| US7911406B2 (en) * | 2006-03-31 | 2011-03-22 | Bradley Lee Eckwielen | Modular digital UHF/VHF antenna |
| US7898456B2 (en) * | 2008-02-19 | 2011-03-01 | Prairielands Energy Marketing Inc. | Apparatus and method for detecting and locating hidden objects |
| KR101289265B1 (ko) * | 2009-12-21 | 2013-07-24 | 한국전자통신연구원 | 대수 주기 안테나 |
| RU2485643C1 (ru) * | 2012-01-24 | 2013-06-20 | Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации | Логопериодическая антенна |
-
2014
- 2014-07-31 FR FR1457419A patent/FR3024595B1/fr not_active Expired - Fee Related
-
2015
- 2015-07-30 WO PCT/EP2015/067490 patent/WO2016016361A1/fr not_active Ceased
- 2015-07-30 EP EP15745187.3A patent/EP3175509B1/fr active Active
- 2015-07-30 US US15/328,708 patent/US10177456B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016016361A1 (fr) | 2016-02-04 |
| US10177456B2 (en) | 2019-01-08 |
| FR3024595A1 (fr) | 2016-02-05 |
| US20170222324A1 (en) | 2017-08-03 |
| EP3175509B1 (fr) | 2023-07-19 |
| FR3024595B1 (fr) | 2017-12-15 |
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