EP1005105B1 - Arrangement pour générer et poursuivre automatiquement des diagrammes d' antenne dans le sens de l' élévation pour des aéronefs pendant des manoeuvres de vol afin de transmettre des données - Google Patents

Arrangement pour générer et poursuivre automatiquement des diagrammes d' antenne dans le sens de l' élévation pour des aéronefs pendant des manoeuvres de vol afin de transmettre des données Download PDF

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Publication number
EP1005105B1
EP1005105B1 EP99122607A EP99122607A EP1005105B1 EP 1005105 B1 EP1005105 B1 EP 1005105B1 EP 99122607 A EP99122607 A EP 99122607A EP 99122607 A EP99122607 A EP 99122607A EP 1005105 B1 EP1005105 B1 EP 1005105B1
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EP
European Patent Office
Prior art keywords
frequency
oscillator
antenna
mixer
transmission
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.)
Expired - Lifetime
Application number
EP99122607A
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German (de)
English (en)
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EP1005105A2 (fr
EP1005105A3 (fr
Inventor
Ludwig Mehltretter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Defence and Space GmbH
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EADS Deutschland GmbH
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Filing date
Publication date
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Publication of EP1005105A2 publication Critical patent/EP1005105A2/fr
Publication of EP1005105A3 publication Critical patent/EP1005105A3/fr
Application granted granted Critical
Publication of EP1005105B1 publication Critical patent/EP1005105B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2682—Time delay steered arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
    • 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
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • 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
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/42—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means using frequency-mixing

Definitions

  • the invention relates to a device for generating and automatic tracking of Antenna diagrams in the elevation direction for aircraft, such as aircraft or terrestrial missiles, in flight maneuvers for the purpose of data transmission, in particular broadband data transmission.
  • the broadband data transmission between relatively moving aircraft must in the higher frequency range, ie in the microwave range, take place, since only there are enough Transmission channels with greater bandwidth are available. But since the Free space attenuation with increasing frequency is getting higher and the transmission power is not can be increased as desired, have antennas with higher profit, so directed antennas be used.
  • phased array antennas For fast tracking of directional antennas are so-called phased array antennas in Field of radar technology known.
  • the disadvantage of these conventional phased array antennas is that to align the antenna diagrams phase shifters in the transmission frequency range use, especially at higher frequencies, a considerable attenuation in the phase networks and relatively due to the requirements of phase stability are expensive.
  • US 5 493 306 discloses a phased array antenna for automatic scanning by tracking an antenna pattern over a predetermined angular range described.
  • phase-shifting delay lines in the Intermediate frequency level arranged and the intermediate frequency is in the individual branches mixed with the signal of a local oscillator in a mixer before the high-frequency Signal is fed to the individual antennas of the array.
  • the phase shift to Tracking of the antenna diagram is based on the principle of Butler matrix, in whose Network the delay lines are involved.
  • the so-called frequency scanning method which dispenses with adjustable phase shifters and is therefore cheaper.
  • this frequency scanning method are the individual antennas of an array with different lengths Power supply lines fed so that different depending on the frequency fed Set phase angles at the individual antennas, resulting in different beam angles result.
  • this method is unusable for data transmission, since the Transmitting frequency changed depending on the required direction of radiation, so that the reception with a remote station is difficult to implement and an antenna tracking after the same Principle is completely impossible.
  • the required tracking rate for the alignment of the antennas in the Elevation range due to the possible flight maneuvers especially by the usually yourself rapidly changing flight attitudes in the roll axis of the aircraft will be much higher.
  • the determination of the respective elevation angle takes place as a function of the attitude angle, i. the roll and the Pitch angle of the aircraft, and the azimuth angle to the remote station.
  • the transmission signal consequently remains at the constant double frequency of the first oscillator. Since the signal f 0 -f S processed by the delay line arrangement has a frequency which is not substantially different from the transmission frequency f 0 , the delay line arrangement must be suitable for generating a well-defined phase shift at this high frequency, which requires relatively high equipment expense brings with it.
  • the invention has for its object to provide a device with a payload data transmission between aircraft during maneuvers and a fast tracking of Antenna diagrams in the elevation direction with low functional and device-technical effort is possible.
  • An advantage of the invention is that the data transmission is independent of the angle under which the communicating aircraft are at a constant carrier frequency can be done. Another advantage is that the phase shift that leads to Alignment of the antenna diagrams of the involved sub-antennas is required low frequencies is generated, so that with the use of relatively less expensive Components for the transmitting and receiving devices without effort a high stability of Tracking can be achieved.
  • the remaining critical part of the circuit in the high frequency range is broad unproblematic in terms of transmission quality, since the antenna assembly with the functions for generating and tracking the antenna diagrams in the immediate vicinity of the antenna feed point and extends in the smallest space.
  • the Feeders extremely short, therefore insensitive and practical for phase changes lossless.
  • Another advantage is the fact that for the transmitting part no expensive power amplifier with high power is needed, but a number of small inexpensive parallel connected Low-power transmit amplifiers are used. Through this parallel connection of In addition, the reliability increases with several transmit power amplifiers or antenna modules the device according to the invention.
  • FIG. 1 shows the inventive arrangement 1 for generating and Tracking of antenna diagrams with a system controller 3, a modulator 5, a demodulator 6 and an oscillator unit 7 comprising a first 8 and a second 9 oscillator, which are expediently formed together in a module.
  • a system controller 3 controls the modulator 5 and a demodulator 6 and an oscillator unit 7 comprising a first 8 and a second 9 oscillator, which are expediently formed together in a module.
  • These dine Networks or assemblies 11, 12, 13, 14, 15, a transmitting branch 21 and a Receiving branch 22 include.
  • Each transmitting branch 21 is connected via a line 23 to the modulator 5 and each receiving branch 22 with a line 24 to the demodulator 6 in conjunction.
  • Both the first oscillator 8 as Also, the second oscillator 9 are connected to the system controller 3, via which the arrangement FIG. 1 with other aircraft systems, in particular the position reference system 25 of FIG Aircraft is connected.
  • the modulator 5 is used to high-frequency signals with user data apply. Accordingly, the demodulator 6 sets received modulated high-frequency signals into digital signals (user data), which are then further processed can.
  • Each transmitting branch 21 has on the side of the modulator 5, a first mixer 31, which of the first oscillator 8 received high-frequency signals with those of the modulator. 5 coming signals mixed.
  • the signal coming from the modulator 5, which is a Intermediate frequency represents a signal with one around the alignment frequency implemented different frequency.
  • Seen from the modulator 5 is the first Mixer 31 is followed by a delay line 33a, the signal by the transmission alignment frequency subjected to a phase shift and that to a second Mixer 35 is guided.
  • the second mixer 35 mixes it with the delay line 33a incoming signal with the signal generated by the second oscillator 9. This will do that by the delay line 33a signal in a signal with the transmission transmission frequency implemented.
  • This signal becomes a transmitting power amplifier or a transmitting power amplifier 37, which is in communication with a transmitting antenna 39.
  • the Send branches 21 in hardware on an antenna assembly, e.g. on a circuit board integrated.
  • the receiving branch 22 comprises a receiving antenna 49 and further from this seen from a receiving amplifier 47, a first mixer 45, a Delay line 43a, 43b, 43c, 43d, 43e and a second mixer 41. It is the first mixer 45 with the second oscillator 9 and the second mixer 41 with the first Oscillator 8 connected. In this way, the coming of the receiving antenna 49 Signal with the reception transmission frequency with that generated by the second oscillator 9 Signal mixed and changed to a signal with a transmit alignment frequency. This Signal is transmitted through the delay line 43a, 43b, 43c, 43d, 43e Phase shift applied, the second mixer 41 and supplied with this a signal coming from the first oscillator 8 mixed so that the signal a constant transmission intermediate frequency receives.
  • the switch 8b and the switch 9b passing through the System control are switched, ensure that for the transmission phase, the mixer 31 and 35 of the transmitting branch and for the receiving phase, the mixer 41 and 45 of the receiving branch be supplied with oscillator signals.
  • the receive transmission frequency is preferably equal to the transmission transmission frequency and is for example in the range of 10 GHz.
  • the transmit alignment frequency however, the receive alignment frequency is less than that Transmission transmission frequency or the reception transmission frequency, both preferably in the range of 1 GHz.
  • the antenna networks 12, 13, 14, 15 thus each have a first mixer 31, a second one in their transmitting branch 21 Mixer 35, a transmission power amplifier or transmission output stage 37 and a transmitting antenna 39 and in their receiving branch 22 each have a first mixer 45, a second mixer 41, a Receive amplifier 47 and a receiving antenna 49.
  • the lengths of the Delay lines are provided so that in the middle position or another defined position of the antenna diagram of an antenna or an antenna network 11, 12, 13, 14, 15 caused in the delay lines phase angles relative to distinguish each other by a multiple of the wavelength. This is the way the antenna network points 12 in its transmitting branch 21, a delay line 33 b and in its receiving branch 22nd a delay line 43b.
  • Analog are in the antenna network 13 the Delay lines 33c and 43c, in the antenna network 14, the delay lines 33d or 43d and provided in the antenna network 15, the delay lines 33e and 43e.
  • the delay lines 33b and 43b are such that a Phase shift occurs, which is at least one wavelength of the in the Delay lines 33a and 43a occurring phase shifts different.
  • a Phase shift occurs, which is at least one wavelength of the in the Delay lines 33a and 43a occurring phase shifts different.
  • the Compared to the phase shifts occurring in the delay line 33a or 43a occurs in the delay lines 33c and 43c, respectively, by at least twice the wavelength greater phase shift, in the delay lines 33d and 43d one around the at least triple wavelength greater phase shift and in the Delay lines 33e and 43e one larger by at least four times the wavelength Phase shift on.
  • the orientation or change of the Antenna diagrams are made by the vectorial addition of the individual signals of each transmitting antenna 39 or each receiving antenna 49, so that in a corresponding manner the signal level the various antenna networks 11, 12, 13, 14, 15 when receiving or transmitting in add vectorially to a particular transmit or receive direction.
  • the Phase shift in the various antenna networks 11, 12, 13, 14, 15 by the delay lines 33a, 33b, 33c, 33d, 33e or 43a, 43b, 43c, 43d of different lengths 43e effected in cooperation with the supply frequencies generated by the first oscillator 8 can, by changing these supply frequencies of the first oscillator 8, which over the each first mixer 31 are superimposed with the signal coming from the modulator 5, the Formation of the main beam direction of the antenna can be effected in a defined direction. This direction is the direction to the aircraft, which is the user data or signals to be sent should receive.
  • the desired angle is preferably determined by the aircraft reference system, e.g. the Inertialsystem, determined and with the azimuth angle to the remote site in the elevation angle converted.
  • the second oscillator 9 in the transmitting part 21 causes that from the respective delay line 33a, 33b, 33c, 33d, 33e, the signal finally reaches the constant transmission transmission frequency is implemented. From the first oscillator 8 on the respective first Mixer 31 introduced to align the respective antenna diagrams frequency deviation Thus, by subtracting a same frequency deviation by the second oscillator 9 and the respective second mixer 35 is eliminated. In this way send the respective transmit antennas 39 the relevant data with the same transmission frequency, regardless of the orientation of belonging to the respective transmitting antennas 39 Antenna diagrams.
  • the fundamental frequency introduced by the second oscillator 9 determines essentially the transmission transmission frequency of the transmitting antennas 39, since the frequency of the second oscillator 9 large compared to the frequency of the first oscillator 8 and the frequency of the signal coming from the modulator 5 23 is.
  • the switches 8b, 9b are set so that the Signals of the first oscillator 8 to the associated first mixer 31 and the signals of the second oscillator 9 to the respective switched second mixer 35 pass.
  • a superposition of the occurring in the respective receiving part 22 Receive signals on the one hand via the second oscillator 9 and the associated respectively first mixer 45 and via the first oscillator 8 in conjunction with this associated second mixer 41 instead.
  • the switches 8b, 9b are set so that the Signals of the first oscillator 8 to the associated second mixers 41 and the signals of the second oscillator 9 reach the respectively switched first mixers 45.
  • the effect in the respective reception branches 22 via the first 8 and second oscillator. 9 introduced phase shifts is inverse to that in the respective transmission branches 21st intended mode of action.
  • the coming of the receiving antenna 49 and from Reception amplifier 47 amplified signal is by means of the second oscillator 9 at a corresponding position of the switch 9b and by means of the respective first mixer 45 with superimposed on a signal that consists of a fundamental frequency and one for the diagram pivoting required variable frequency.
  • the signal with the intermediate frequency is the demodulator via line 24 6 supplied.
  • the signals are behind the respective first mixers 45 via the delay lines 43a, 43b, 43c, 43d, 43e led to the resulting by these delay lines phase delay in a To convert diagram change, which the receipt of signals of the remote station from the accomplish horizontal direction, i. from a substantially parallel to the earth's surface running direction.
  • the transmission case is due to the two-time mixture in the first Mixer 45 and the second mixer 41, the reception frequency to that in the line 24th present constant intermediate frequency implemented and supplied to the demodulator 6.
  • the system controller 3 calculates the elevation angle from the attitude angles, i. the roll, Pitch and azimuth angles, and places them in the required frequency offset for generation together with the delay lines 33a, 33b, 33c, 33d, 33e and 43a, 43b, 43c, 43d, 43e caused phase shifts in the also effected transmit or receive alignment frequency um, by the drive signals for the first oscillator 8 and the second oscillator 9 is generated.
  • the phase shifts that occur between the antenna networks occur are provided so that for sending or receiving a Antenna main beam direction of the alignment arrangement 1 results in a target angle relative to an aircraft-fixed reference axis, i. is aligned to the remote station at each attitude.
  • the phase shift to be provided in each antenna network depends on the Distances between the respective transmit 39 - or the respective reception 49 - antennas the antenna networks 11, 12, 13, 14, 15 from. These are preferably the same size. Are these different, determine the required phase positions for generation or education and Alignment of the antenna main beam direction according to known algorithms.
  • FIG. 2 shows by way of example an antenna main beam direction 70.
  • system controller 3 is provided, the control signals for switching from Send to receive and vice versa as well as on and off signals for amplifier modules (not shown) to produce.
  • system controller 3 the Transmission or reception frequency selection by definition or change of the second Oscillator 9 generates fundamental frequency controls.
  • switches 8b and 9b With the help of the switches 8b and 9b is between the modes Send and Receive switched. Alternatively, however, if for sending and receiving different Frequency (frequency diversity) also a parallel sending and receiving be provided. In this case, two first 8 or second 9 oscillators can be provided.
  • AM amplitude modulation
  • FM Frequency Modulation
  • PM Phase Modulation
  • Spread Spectrum amplitude modulation
  • the entire circuit of the antenna networks 11, 12, 13, 14, 15, possibly also including the antennas 39, 49 is suitably on a common or at least per transmission or reception branch common printed circuit board 80 ( Figure 3) housed, which can be designed as a multilayer. Furthermore, the transmitting antennas can also 39 and receiving antennas 49 are housed on this common plate, the antennas then being e.g. Patch or slot antennas and the active components in SMD or chip technology are executed.
  • the transmitting and receiving antennas 49 49 parts of Being an aircraft structure.
  • this arrangement results, in particular, in the Advantage that the radar backscatter cross section and the aerodynamic conditions are not or change only relatively small.
  • each antenna field of the antenna networks 11, 12, 13, 14, 15 for the transmitting (21) and the receiving branch (22) even with only one antenna field be realized.
  • Such an antenna field would then have a corresponding antenna per antenna Changeover switch or a circulator will be assigned to these antennas in case of sending the corresponding functions of the transmission branch 21 and in the case of receiving the corresponding functions of the receiving branch 22 assign.
  • the antenna networks or assemblies 11, 12, 13, 14, 15 may be in aircraft structural parts be integrated.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Radar Systems Or Details Thereof (AREA)

Claims (5)

  1. Dispositif pour générer un diagramme d'antenne en vue d'une transmission de données à large bande entre des aéronefs sur une fréquence de transmission prédéfinie et pour poursuivre le diagramme d'antenne dans la direction d'élévation lors de manoeuvres en vol, comprenant
    a) une antenne réseau, formée de plusieurs antennes (39, 49) ayant des réseaux d'alimentation associés (11, 12, 13, 14, 15), comportant chacun une branche émettrice et une branche réceptrice (21, 22),
    b) un agencement d'oscillateurs présentant un premier oscillateur pour générer une fréquence d'alignement, pouvant être décalée d'un premier écart de fréquence prédéfini par rapport à une fréquence centrale prédéfinie, dans un domaine de fréquences plus bas en comparaison de la fréquence de transmission, et un second oscillateur pour générer la fréquence de transmission pour la transmission de données,
    c) des agencements de mélangeurs (31, 35, 41, 45) respectivement prévus dans les réseaux d'alimentation (11, 12, 13, 14, 15) pour le mélange de signaux générés par l'agencement d'oscillateurs (8, 9), et comportant le premier écart de fréquence, avec des signaux générés par l'agencement d'oscillateurs (8, 9), déphasés chacun au moyen d'agencements de lignes à retard (33a, 43a, 33b, 43b, 33c, 43c, 33d, 43d, 33e, 43e) dans le sens de la poursuite souhaitée du diagramme d'antenne, et comportant un second écart de fréquence compensant le premier écart de fréquence,
    caractérisé en ce
    d) que les agencements de mélangeurs (31, 35, 41, 45) prévus dans les réseaux d'alimentation (11, 12, 13, 14, 15) comportent chacun, dans les lignes d'arrivée aux antennes individuelles, les uns derrière les autres dans la direction de traitement des signaux, un premier mélangeur (31, 45) et un second mélangeur (35, 41), et les agencements de lignes à retard (33a, 43a, 33b, 43b, 33c, 43c, 33d, 43d, 33e, 43e) comportent des lignes à retard (33a, 43a, 33b, 43b, 33c, 43c, 33d, 43d, 33e, 43e) prévues chacune entre le premier mélangeur (31, 45) et le second mélangeur (35, 41) de l'un des réseaux d'alimentation (11, 12, 13, 14, 15) pour retarder la fréquence d'alignement plus basse du premier oscillateur (8), qui diffère pour des antennes voisines d'au moins une longueur d'onde ou à chaque fois d'un multiple d'une longueur d'onde pour la fréquence centrale prédéfinie du premier oscillateur (8),
    e) que le second oscillateur (9) génère la fréquence de transmission plus haute présentant le second écart de fréquence compensant le premier écart de fréquence contenu dans la fréquence d'alignement plus basse,
    f) qu'un dispositif de commande (3) est prévu pour générer un signal de commande, calculé à partir des angles de position de l'avion, pour la poursuite du diagramme d'antenne, et
    g) que le premier oscillateur (8) est couplé dans la branche émettrice (21) au premier mélangeur (31) et dans la branche réceptrice au second mélangeur (41), et le second oscillateur (9) est couplé dans la branche émettrice (21) au second mélangeur (35) et dans la branche réceptrice (22) au premier mélangeur (45).
  2. Dispositif suivant la revendication 1, caractérisé en ce que les antennes (39, 49) de la branche émettrice (21) et de la branche réceptrice (22) sont remplacées chacune par une antenne commune, reliée aux autres réseaux d'alimentation (11, 12, 13, 14, 15) par un interrupteur ou un circulateùr.
  3. Dispositif suivant l'une des revendications 1 et 2, caractérisé en ce que les réseaux d'alimentation (11, 12, 13, 14, 15) forment deux unités par l'intégration des branches émettrices (21) et des branches réceptrices (22) sur deux plaquettes de circuits imprimés au total.
  4. Dispositif suivant l'une des revendications 1 et 2, caractérisé en ce que les réseaux d'alimentation (11, 12, 13, 14, 15) forment une unité unique par l'intégration sur une plaquette de circuits imprimés.
  5. Dispositif suivant l'une des revendications précédentes, caractérisé en ce que les réseaux d'antennes (11, 12, 13, 14, 15) sont intégrés dans des parties structurales d'avion.
EP99122607A 1998-11-23 1999-11-13 Arrangement pour générer et poursuivre automatiquement des diagrammes d' antenne dans le sens de l' élévation pour des aéronefs pendant des manoeuvres de vol afin de transmettre des données Expired - Lifetime EP1005105B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853933 1998-11-23
DE19853933A DE19853933B4 (de) 1998-11-23 1998-11-23 Verfahren zur Erzeugung und automatischen Nachführung von Antennen-Diagrammen in der Elevationsrichtung für Luftfahrzeuge bei Flugmanövern zum Zwecke der Datenübertragung

Publications (3)

Publication Number Publication Date
EP1005105A2 EP1005105A2 (fr) 2000-05-31
EP1005105A3 EP1005105A3 (fr) 2002-01-02
EP1005105B1 true EP1005105B1 (fr) 2005-01-12

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EP99122607A Expired - Lifetime EP1005105B1 (fr) 1998-11-23 1999-11-13 Arrangement pour générer et poursuivre automatiquement des diagrammes d' antenne dans le sens de l' élévation pour des aéronefs pendant des manoeuvres de vol afin de transmettre des données

Country Status (3)

Country Link
EP (1) EP1005105B1 (fr)
AT (1) ATE287128T1 (fr)
DE (2) DE19853933B4 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2342278T3 (es) 2002-04-27 2010-07-05 Eads Deutschland Gmbh Procedimiento de intercambio de datos entre aviones militares y dispositivo para la puesta en practica de este procedimiento.
CN106887706B (zh) * 2017-03-17 2020-06-30 王家齐 全自动卫星跟踪通信天线电子极化跟踪方法和装置
CN114725682B (zh) * 2022-04-19 2023-08-01 广州程星通信科技有限公司 一种相控阵波束指向设计方法、系统、装置及存储介质

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE792171A (fr) * 1971-09-17 1973-06-01 Int Standard Electric Corp Antenne d'exploration de trame
US3858208A (en) * 1973-02-05 1974-12-31 Hughes Aircraft Co Automatic prf selection to optimize range and doppler visibility in radar tracking
US4731614A (en) * 1986-08-11 1988-03-15 Crane Patrick E Phased array scanning system
US5493306A (en) * 1987-08-28 1996-02-20 Eaton Corporation Phased array antenna system to produce wide-open coverage of a wide angular section with high directive gain and moderate capability to resolve multiple signals
US5353031A (en) * 1993-07-23 1994-10-04 Itt Corporation Integrated module controller
US5587714A (en) * 1995-03-10 1996-12-24 Space Systems/Loral, Inc. Spacecraft antenna pointing error correction
JP3204111B2 (ja) * 1996-08-28 2001-09-04 松下電器産業株式会社 指向性制御アンテナ装置

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ATE287128T1 (de) 2005-01-15
DE19853933A1 (de) 2000-06-08
DE19853933B4 (de) 2004-04-29
EP1005105A2 (fr) 2000-05-31
DE59911440D1 (de) 2005-02-17
EP1005105A3 (fr) 2002-01-02

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