WO2010009685A1 - Antenne bi-bande intégrée et procédé de communication aéronautique par satellite - Google Patents

Antenne bi-bande intégrée et procédé de communication aéronautique par satellite Download PDF

Info

Publication number
WO2010009685A1
WO2010009685A1 PCT/DE2008/001201 DE2008001201W WO2010009685A1 WO 2010009685 A1 WO2010009685 A1 WO 2010009685A1 DE 2008001201 W DE2008001201 W DE 2008001201W WO 2010009685 A1 WO2010009685 A1 WO 2010009685A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
antenna
aircraft
data
server
Prior art date
Application number
PCT/DE2008/001201
Other languages
German (de)
English (en)
Inventor
Jörg Oppenländer
Michael Seifried
Christoph Häussler
Jörg TOMES
Alexander Friesch
Original Assignee
Qest Quantenelektronische Systeme Gmbh
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 Qest Quantenelektronische Systeme Gmbh filed Critical Qest Quantenelektronische Systeme Gmbh
Priority to PCT/DE2008/001201 priority Critical patent/WO2010009685A1/fr
Publication of WO2010009685A1 publication Critical patent/WO2010009685A1/fr

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/42—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
    • H04B7/18508—Communications with or from aircraft, i.e. aeronautical mobile service with satellite system used as relay, i.e. aeronautical mobile satellite service

Definitions

  • the weight of the antenna system is very important because it reduces the payload of the aircraft and leads to additional operating costs.
  • the two most important frequency bands used for aeronautical satellite communication are the L band - in particular the Inmarsat services (about 1.5GHz - 1.7GHz) - and the Ku band - in particular the frequency range from 10.7GHz to 12.75GHz and 14GHz - 14.5GHz for satellite TV and broadband Internet connections.
  • L-Band services assign a separate (narrow) frequency range to each user
  • the Ku band has many uses and the distinction is made solely by the orientation of the antenna to a particular satellite.
  • the availability of the services is very different in the two frequency bands. While in the L-band with Inmarsat a service exists, which is practically globally available, this is only very limited in the Ku band. A good Ku-band coverage exists system-conditioned only on land masses with a high population density. A large part of the routes, especially on long-haul routes, are not covered. On the other hand, because of the relatively small available bandwidth (approximately 34 MHz), the L-band services are severely limited in their data capacity (currently at most 432 Kbps / channel). In the Ku band, however, high data rates (about 40 Mbps / transponders) are available at 1-2 GHz bandwidth.
  • Such an antenna also offers the possibility of novel services, which are very useful for the aircraft passenger. Because it is possible in a relatively simple way to generate hybrid data channels in which the uplink (data transmission to the satellite) via the L-band and - A -
  • the downlink (data transmission from the satellite to the aircraft) is handled via the Ku band.
  • this service can also be made possible by attaching an additional Ku-band antenna.
  • an additional Ku-band antenna is less advantageous than the use of a dual-band antenna, it may be cheaper to retrofit.
  • the object is thus to provide an integrated antenna aperture, which covers in particular the important for aeronautical applications frequency bands Ku-band and L-band and their antenna characteristic allows simultaneous communication with several different satellites.
  • the antenna system should require only the smallest possible space at the lowest possible weight and allow it to generate a hybrid asymmetric Internet access, which can use both frequency bands.
  • the dual-band antenna for the frequency ranges L-band (1.5GHz - 1.7GHz) and Ku-band (10.7GHz - 14.5GHz) consists of a planar antenna array of Ku-band antenna elements interconnected by a feed network, and at least one L-band antenna element, wherein the supply network with an electrically conductive, in particular metallic shield is provided such that the Ku-band antenna elements are not shielded and can receive undisturbed an incident electromagnetic wave, and the at least one L-band antenna element in the incident direction over the Ku-band antenna array is arranged and designed such that it consists of a metallic structure which has one or more openings in the direction of incidence so that the Ku-band antenna elements are not completely covered by the metallic structure of the at least one L-band antenna element in the direction of incidence.
  • An aperture according to the invention thus consists of several layers, the different layers being sensitive to different frequency bands and / or different polarization directions.
  • the lowermost layer is sensitive to the highest occurring frequency, the next layer to the next lower u.s.w ..
  • By appropriate geometric design of the layers is achieved that they are permeable to electromagnetic waves of the frequencies of the respective underlying layers. In the simplest embodiment with two layers, this is done for example by periodic hole structures in electrically conductive, thin plates, wherein the extension of the holes is in the range of half the wavelength of the larger of the two frequencies.
  • the periodic hole structures of the upper of the two layers are again typically interrupted periodically at half the wavelength of the smaller of the two frequencies.
  • the metallic shielding of the Ku-band feed network itself is structured as an L-band antenna and the number of Layers is minimized.
  • the metal shield can be provided with slots and / or recesses at the locations where no supply lines run, so that structures with the characteristic length of L-band antennas. If these structures are fed properly, then such a structured shielding can be operated as an L-band antenna, without the Ku-band antenna field is disturbed.
  • Embodiments are also conceivable in which the Ku-band antenna fields are specifically dimensioned such that they have the extent of an L-band antenna. In this way, both bands can be easily integrated directly. Several such integrated modules can then in turn be variably or permanently interconnected into fields. With variable interconnection, the Ku-band lobe and the L-band lobe can then be controlled electronically, or multi-beam antennas can be realized simultaneously for both frequency bands.
  • the aperture sensitive for receiving Ku-band signals consists of a dipole antenna array 100 with feed network 101 located on a planar substrate 102.
  • the feed network 101 is covered by a perforated grid 103.
  • the dipole field 100 may be designed to satisfy the necessary conditions for Ku-band satellite reception, both in terms of antenna gain and directivity.
  • the L-band part of the integrated Aperture consists of three patch antennas 105 mounted with standoffs 106 over the Ku-band aperture.
  • the perforated grid 103 of the Ku-band antenna field 100 forms the base plate for the L-band patches 105.
  • the size of the L-band patches 105 can be adapted to the required instantaneous frequency band since the characteristic lengths in the Ku band are approximately 2 cm (spatial period of the grid) and in the L-band at about 8 cm (edge length of a patch) are.
  • the impedance and the bandwidth can be adjusted over the length of the spacer bolts 106.
  • the length of the standoffs 106 is about 1 cm.
  • Feeding 107 of the patch structures typically occurs via coaxial waveguides which are routed along the ridges of the Ku-band grating 103. Accordingly, the feeding 111 of the antenna array 100 can be performed by the metallic base plate 102a.
  • the L-band patches also have a hole structure 108, which is designed such that an incident Ku-band wave is not or only slightly disturbed. Since the L-band patches 105 are operated with circular electromagnetic modes, the hole structure 108 disturbs the corresponding current distributions only very slightly.
  • the size of holes of the L-band patches 105 is at least equal to or larger than the holes 110 of the Ku-band shield.
  • the apertures 109 in the L-band antenna aperture act as passive secondary radiators, their permeability to Ku-band waves is not imperative. These openings 109 are larger than the holes 110 in the shielding of the Ku-band feed network 101. As long as the L-band antennas 105 are in the near field of the Ku-band beam elements 104, openings 109 suffice, the extent of which is in the range of half Ku Band wavelength is.
  • the Ku-band antenna array 100 can be inexpensively implemented in microstrip line technology.
  • the Ku-band antenna array can also consist of individual horns, which are connected to each other with a suitable feeder network.
  • the aperture openings of the individual horns form the perforated grid of the Ku-band aperture and the L-band antenna elements lie over the edges of the horns.
  • the L-band antenna characteristic with respect to the surface normal of the Ku-band aperture fixed or variable can be set. This allows at least two different satellites (a Ku-band and an L-band satellite) to be targeted simultaneously. With such a layer structure it is thus achieved that, with one and the same aperture, without substantial increase in the structure, both L-band and Ku-band signals can be received simultaneously from different satellites.
  • the antenna is aimed at the Ku-band satellite to be received.
  • the three L-band patches 105 are then controlled to point to an L-band satellite. Since both satellites are in geostationary orbit and the aperture angle of the L-band aperture in elevation is typically up to 90 °, only a beam sweep in azimuth direction is necessary for this purpose.
  • a pivoting range of the L-band beam of approximately 60 ° is typically sufficient.
  • a beam width of about 30 ° - 60 ° is sufficient, which can be achieved with an arrangement of three L-band patches 105 easily.
  • the link can already be closed with a single patch 105.
  • the object of generating a hybrid asymmetric internet access which can use both frequency bands is achieved by a satellite data communication device for data communication with flying aircraft, with an antenna device designed for both the L-band and the Ku-band , an L-band modem, a Ku-band modem, an aircraft-based server, means for airborne distribution of the data to aircraft passengers, the antenna device being mounted on an aircraft, the antenna device with connected to the L-band modem, the Ku-band modem and the aircraft-based server, the L-band modem and the Ku-band modem are connected to the aircraft-based server, the aircraft-based server controls the orientation of the dual-band antenna, the aircraft-based server is designed to communicate via at least one L-band channel via an L-band satellite and a ground station of the L-band satellite with a terrestrial server, the aircraft-based server data coming from the aircraft via the at least one L-band channel to the earthbound server redirects the aircraft-based server via the L-band data channel on availability at least one Ku-band data channel unlocks, so that the terrestrial server
  • the typical data transmission service possible with the dual-band antenna is shown in FIG. 1b.
  • the L-band portion of the antenna 112 is connected to an aeronautical L-band modem 113, which communicates via a standard interface with an aircraft-mounted server 114.
  • an aircraft-mounted server 114 Via a Ku-band receiver (Ku-band modem) 114a, which is connected to the Ku-band part of the antenna 112, the server 114 closes the hybrid link.
  • the laptop 116 of the For example, an airline passenger communicates via WLAN with the aircraft-mounted server 114.
  • the server 114 receives a data packet request, it sends the packet over the L-band satellite channel 117 to the ground station 118 of the L-band satellite 119. From there, the packet is sent to a terrestrial Proxy server 120 sent.
  • the Ku-band part of the dual-band antenna 112 receives the entire data stream and sends it via the Ku-band receiver to the server located in the aircraft. This filters out the data packet intended for the passenger from the data transport stream and combines this with the data received via the L-band channel 117.
  • the server forwards the complete data package to the passenger's laptop.
  • the distribution of the data may e.g. via a WLAN or fixed aircraft cabling.
  • L-band channels 117 can also be bundled.
  • the device and the method are thus flexibly adaptable to the prevailing conditions prevailing at the current position of the aircraft.
  • the data rate can be adapted to the respective needs. If the need is low, e.g. by a small number of users on the plane, then only a few of the available channels are used. In case of high demand all available channels can be switched freely. This variability and flexibility leads to a significant reduction in costs.
  • the aircraft passenger can use all kinds of services, e.g. Internet access, e-mail, telephony (including mobile), video conferencing, live TV (via Internet stream or direct), offered.
  • services e.g. Internet access, e-mail, telephony (including mobile), video conferencing, live TV (via Internet stream or direct), offered.
  • the Ku band portion of the dual band integrated aperture can be used not only to receive signals but also to send signals in Ku band. This makes it possible to use both the Ku-band link and the L-band link bidirectional. This embodiment of the invention has even higher variability because, if a bidirectional Ku-band service is available, this can also be used alone. This makes it possible to freely choose the most cost-effective service.
  • low-cost, relatively small antenna systems can be realized, which can be operated either in bidirectional Ku-band mode or in bidirectional L-band mode. Since for certain flight routes, especially near the equator, Ku-band antennas with small dimensions in transmission mode may not be operated for regulatory reasons, can be switched to the bidirectional L-band mode here. These embodiments avoid large and expensive Ku-band broadcast installations, since only with these near the equator is it possible to allow Ku-band broadcast operation.
  • the integrated dual-band aperture (701) is aligned either with the respective Ku-band satellite or with the respective L-band satellite.
  • Electronic control of the L-band portion of the dual-band integrated aperture is not necessary in either / or operation.
  • the L-band antenna elements can be mounted on an elevation axis of the positioner independently of the Ku-band aperture because simultaneous operation of Ku-band aperture and L-band aperture is not provided in these embodiments.
  • FIGS. 2 to 7b Further exemplary embodiments of a dual-band antenna 201 to 205 are shown in FIGS. 2 to 7b.
  • the plane Ku-band antenna array 206 consists of individual aperture antennas (slot radiators) 207, which are connected to a waveguide network 208 are supplied. Since the characteristic lengths in the Ku band are also in the range of approx. 2 cm, it is also possible to mount corresponding L-band patch antennas 209 over this field with no or only very little interference.
  • This embodiment has the advantage that waveguide structures are in principle less noisy than feeding structures that are located on a substrate.
  • the L-band portion of the aperture is designed not as patch antennas, but as planar spiral antennas 210 which are mounted over the ridges 211 of the Ku-band perforated grating 212.
  • This embodiment has the advantage that with spiral antennas 210 greater instantaneous bandwidths can be achieved and when operating with circular modes, the direction of rotation can already be determined by the geometry of the antennas themselves.
  • the spiral antennas 210 are mounted via spacers 213.
  • the L-band antennas are not designed as flat spirals, but as spatial helical antennas 214. With these embodiments, higher directivities and thus a higher antenna gain can be achieved. In addition, parasitic resonances possibly occurring in the Ku band may be successively eliminated by adjusting the pitch of the helices accordingly.
  • the L-band antennas are designed as loop antennas (loop antennas) or as dipole antennas. Since the characteristic lengths in the Ku band and the L band in the manner described above are compatible even in these cases, the dimensioning of these L-band antennas can be such that the Ku-band antenna is not or only slightly disturbed. These embodiments have the advantage that by using different L-band antenna elements, the overall antenna characteristic can be modeled in detail.
  • Fig. 5 an embodiment is shown in which the metallic shield 215 of the Ku-band feed network itself is structured as an L-band antenna.
  • the feed network is designed geometrically such that slots 216 and recesses 217 can be mounted in the shield such that geometric structures arise which have the extension of the characteristic L-band length.
  • suitable feeding points 218, the desired circular current distributions are formed in these structures.
  • FIG. 6 shows an embodiment 205 in which the Ku-band antenna fields 222 are dimensioned such that they have the extent of the L-band patch antennas 219.
  • the metallic shield 221 of the feed network of the Ku-band antenna array itself then forms the L-band patch.
  • Several such elements are in turn connected by an external Ku-band feed network 220 to a feed point 223 to a field.
  • the L-band patches can also be interconnected accordingly. This embodiment has the advantage of a very large variability.
  • a complete aeronautical antenna system 700 is shown with integrated Ku / L-band antenna. It consists of a dual-band Aperture (701) (here with protective cover) which is coupled to a cryo-electronic low-noise amplifier (LNA) (702). The cryoelectronic LNA is operated by means of a small cooler (703) at a temperature of about 70 K.
  • the antenna module consisting of the dual-band aperture (701) and the LNA (702) with cooler (703) and an L-band diplexer (704) is in a positioning platform
  • the antenna module itself is mounted on the elevation axis with the transducers (70 ⁇ a) and (706b).
  • the axle bearings are designed as maintenance-free plain bearings. With the help of the sprocket sector disc
  • the antenna can be tilted in an elevation angle range of 0 ° to 90 °.
  • the azimuth motor (709) engages in a 360 ° sprocket
  • a rotary feedthrough (712) is integrated, which contains the required RF channels and channels for the power supply of the motors, the small cooler and the electronics, and channels for data transmission and control.
  • the orientation of the dual-band antenna can be controlled by, for example, a computer (server) located inside the aircraft.
  • This computer is typically connected to the aircraft navigation system and receives from this the position and location data necessary for the alignment of the antenna. It will become calculates positioning data for the antenna for positioning on a particular Ku-band or L-band satellite. These positioning data are transmitted to the control and regulating electronics which are located in the electronic boxes (714a) and (714b).
  • the control electronics controls the azimuth motor (709) and the elevation motor (708) and optionally the orientation of the L-band lobe via the L-band beam forming network accordingly.
  • the antenna system 700 shown in FIGS. 7a and 7b requires considerably less space at comparable or even higher performance and has a considerably lower weight than two separate ones antennas.
  • the space requirement is even smaller than that typically required for a single aeronautical L-band or Ku-band antenna.
  • the dual-band antenna can thus be operated in a compact design with a cryo-electronic preamplifier, resulting in a significant increase in sensitivity and thus the performance of the antenna with minimal space requirements leads.
  • the antenna system 700 shown in FIGS. 7a and 7b can be mounted directly on the fuselage and covered with an aerodynamic radome.
  • only a single positioning platform is required and it is sufficient for a single pressure-resistant implementation in the cabin. This considerably reduces the installation costs.
  • only a single mounting position on the aircraft fuselage is required on the aircraft side, which reduces the manufacturing costs.
  • the antenna is operated with conventional LNAs (not cryogenically cooled) integrated into the positioning platform shown. While less powerful than the illustrated embodiment, this embodiment has the advantage of lower cost and lower overall weight.
  • additional L-band antenna elements are mounted on the antenna platform shown in FIGS. 7a and 7b between the elevation axis and the electronics boxes and interconnected with those located in the aperture (701).
  • This embodiment has the advantage that the angular range of the L-band antenna field and / or the directivity can be increased.
  • the Positioning Platform (700) can also be used to integrate the dual band dual aperture (701) on either a Ku-band satellite or an L-band satellite align.
  • the Ku band part of the aperture is designed both for receiving and for sending in Ku band.
  • both bidirectional Ku-band services and bidirectional L-band services can be used in a relatively simple manner.
  • the antenna system is then additionally equipped with the necessary transmission equipment (transmit power amplifier, up-converter, Ku-band diplexer, etc.).
  • the L-band antenna elements are spatially separated from the Ku-band antenna elements on the elevation axis of the positioning platform (700) so that either the Ku-band antenna elements or the L-band antenna elements can be aligned with the respective satellite ,

Abstract

L'invention concerne un dispositif d'antenne avec une antenne bi-bande pour les plages de fréquence en bande L (1,5 GHz -1,7 GHz) et en bande Ku (10,7 GHz - 14,5 GHz), en particulier pour des applications aéronautiques, constitué d'un champ d'antenne plat (100) d'éléments d'antenne en bande Ku qui sont reliés ensemble par un réseau d'alimentation (101) et au moins un élément d'antenne en bande L (105). Le réseau d'alimentation est pourvu d'un blindage électriquement conducteur (103), en particulier métallique, de telle manière que les éléments d'antenne en bande Ku ne soient pas blindés et puissent recevoir une onde électromagnétique incidente sans problème, et ledit au moins un élément d'antenne en bande L est disposé dans le sens d'incidence au-dessus du champ d'antenne en bande Ku et est réalisé de manière à être constitué d'une structure métallique pourvue d'une ou plusieurs ouvertures dans la direction d'incidence de sorte que les éléments d'antenne en bande Ku sont pas totalement recouverts dans la direction d'incidence par la structure métallique dudit au moins un élément d'antenne en bande L.
PCT/DE2008/001201 2008-07-23 2008-07-23 Antenne bi-bande intégrée et procédé de communication aéronautique par satellite WO2010009685A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/DE2008/001201 WO2010009685A1 (fr) 2008-07-23 2008-07-23 Antenne bi-bande intégrée et procédé de communication aéronautique par satellite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2008/001201 WO2010009685A1 (fr) 2008-07-23 2008-07-23 Antenne bi-bande intégrée et procédé de communication aéronautique par satellite

Publications (1)

Publication Number Publication Date
WO2010009685A1 true WO2010009685A1 (fr) 2010-01-28

Family

ID=40512197

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/001201 WO2010009685A1 (fr) 2008-07-23 2008-07-23 Antenne bi-bande intégrée et procédé de communication aéronautique par satellite

Country Status (1)

Country Link
WO (1) WO2010009685A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010124867A1 (fr) * 2009-04-30 2010-11-04 Qest Quantenelektronische Systeme Gmbh Système d'antenne large bande pour communication par satellites
CN109831245A (zh) * 2019-03-22 2019-05-31 中国人民解放军军事科学院国防科技创新研究院 天基数据链装置及天基数据链传输方法
WO2022109734A1 (fr) * 2020-11-24 2022-06-02 Macdonald, Dettwiler And Associates Corporation Élément rayonnant à double bande et réseau d'antennes modulaires

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771158A (en) * 1972-05-10 1973-11-06 Raytheon Co Compact multifrequency band antenna structure
EP0188345A2 (fr) * 1985-01-17 1986-07-23 Cossor Electronics Limited Système d'antennes à deux bandes de fréquences
US4775866A (en) * 1985-05-18 1988-10-04 Nippondenso Co., Ltd. Two-frequency slotted planar antenna
WO1998001921A1 (fr) * 1996-07-04 1998-01-15 Skygate International Technology Nv Antenne reseau plane bifrequence
US5835057A (en) * 1996-01-26 1998-11-10 Kvh Industries, Inc. Mobile satellite communication system including a dual-frequency, low-profile, self-steering antenna assembly
US6239762B1 (en) * 2000-02-02 2001-05-29 Lockheed Martin Corporation Interleaved crossed-slot and patch array antenna for dual-frequency and dual polarization, with multilayer transmission-line feed network
WO2003063294A1 (fr) * 2002-01-17 2003-07-31 Harris Corporation Antenne bicouche a pellicule electrique dont la bande passante est amelioree

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771158A (en) * 1972-05-10 1973-11-06 Raytheon Co Compact multifrequency band antenna structure
EP0188345A2 (fr) * 1985-01-17 1986-07-23 Cossor Electronics Limited Système d'antennes à deux bandes de fréquences
US4775866A (en) * 1985-05-18 1988-10-04 Nippondenso Co., Ltd. Two-frequency slotted planar antenna
US5835057A (en) * 1996-01-26 1998-11-10 Kvh Industries, Inc. Mobile satellite communication system including a dual-frequency, low-profile, self-steering antenna assembly
WO1998001921A1 (fr) * 1996-07-04 1998-01-15 Skygate International Technology Nv Antenne reseau plane bifrequence
US6239762B1 (en) * 2000-02-02 2001-05-29 Lockheed Martin Corporation Interleaved crossed-slot and patch array antenna for dual-frequency and dual polarization, with multilayer transmission-line feed network
WO2003063294A1 (fr) * 2002-01-17 2003-07-31 Harris Corporation Antenne bicouche a pellicule electrique dont la bande passante est amelioree

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAMES J R ET AL: "SUPERIMPOSED DICHROIC MICROSTRIP ANTENNA ARRAYS", IEE PROCEEDINGS H. MICROWAVES, ANTENNAS & PROPAGATION, INSTITUTION OF ELECTRICAL ENGINEERS. STEVENAGE, GB, vol. 135, no. 5, PART H, 1 October 1988 (1988-10-01), pages 304 - 312, XP000008833, ISSN: 0950-107X *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010124867A1 (fr) * 2009-04-30 2010-11-04 Qest Quantenelektronische Systeme Gmbh Système d'antenne large bande pour communication par satellites
US8477075B2 (en) 2009-04-30 2013-07-02 Qest Quantenelektronische Systeme Gmbh Broadband antenna system for satellite communication
CN109831245A (zh) * 2019-03-22 2019-05-31 中国人民解放军军事科学院国防科技创新研究院 天基数据链装置及天基数据链传输方法
WO2022109734A1 (fr) * 2020-11-24 2022-06-02 Macdonald, Dettwiler And Associates Corporation Élément rayonnant à double bande et réseau d'antennes modulaires

Similar Documents

Publication Publication Date Title
EP2425490B1 (fr) Système d'antenne à large bande pour communication par satellite
DE112004001506B4 (de) Breitbandige, doppelt polarisierte Basistationsantenne für optimale Horizontal-Strahlungsmuster und variable Vertikal-Strahlbündelneigung
US9761937B2 (en) Fragmented aperture for the Ka/K/Ku frequency bands
US9698492B2 (en) Low-cost diplexed multiple beam integrated antenna system for LEO satellite constellation
US6121931A (en) Planar dual-frequency array antenna
US7388551B2 (en) Antenna system
US20080189747A1 (en) System For Concurrent Mobile Two-Way Data Communications And TV Reception
US20110109501A1 (en) Automated beam peaking satellite ground terminal
US9819082B2 (en) Hybrid electronic/mechanical scanning array antenna
US6366244B1 (en) Planar dual band microstrip or slotted waveguide array antenna for all weather applications
KR20230027008A (ko) Leo 위성 통신 시스템 및 방법
Vaccaro et al. Ku-band low-profile Rx-only and Tx-Rx antennas for mobile satellite communications
WO2010009685A1 (fr) Antenne bi-bande intégrée et procédé de communication aéronautique par satellite
Rohrdantz et al. Digital beamforming antenna array with polarisation multiplexing for mobile high‐speed satellite terminals at Ka‐band
US11223126B1 (en) Combined cross-link and communication-link phased array for satellite communication
DE102008030327A1 (de) Integrierte Dualband - Antenne und Verfahren zur aeronautischen Satellitenkommunikation
Baggen et al. Phased array technology by IMST: A comprehensive overview
Shelley et al. Low profile, dual polarised antenna for aeronautical and land mobile satcom
DE60112335T2 (de) Phasengesteuerte gruppenantenne mit spannungsgesteuertem phasenschieber
DE102011121138B4 (de) Breitband-Antennensystem zur Satellitenkommunikation
Blázquez-García et al. Smart relay architecture for over-the-horizon high quality communications with unmanned aerial vehicles
Abderrahmane et al. An S band antenna system used for communication on earth observation microsatellite
US20240120989A1 (en) Airborne Satellite Connectivity System
Rao et al. Design options for a Multi-beam/multi-band Airborne Antenna
Kummer et al. A high-gain self-steering microwave array

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08801053

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 08801053

Country of ref document: EP

Kind code of ref document: A1