FR2876506A1 - Single radio frequency antenna utilization permitting device for mobile satellite transmission and receiving station, has switch with high RF isolation and switching rapidly between satellite and GPS signals by detection of RF signals - Google Patents
Single radio frequency antenna utilization permitting device for mobile satellite transmission and receiving station, has switch with high RF isolation and switching rapidly between satellite and GPS signals by detection of RF signals Download PDFInfo
- Publication number
- FR2876506A1 FR2876506A1 FR0410729A FR0410729A FR2876506A1 FR 2876506 A1 FR2876506 A1 FR 2876506A1 FR 0410729 A FR0410729 A FR 0410729A FR 0410729 A FR0410729 A FR 0410729A FR 2876506 A1 FR2876506 A1 FR 2876506A1
- Authority
- FR
- France
- Prior art keywords
- satellite
- switch
- signals
- gps
- detection
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 title claims abstract description 4
- 238000002955 isolation Methods 0.000 title abstract description 4
- 230000006378 damage Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910017214 AsGa Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
- H01P1/15—Auxiliary devices for switching or interrupting by semiconductor devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
Landscapes
- Radio Relay Systems (AREA)
Abstract
Description
2876506 - 1 -2876506 - 1 -
La présente invention concerne un dispositif pour permettre l'utilisation d'une seule antenne radio-fréquence (RF) sur une station d'émission et réception satellite mobile nécessitant au départ deux antennes. The present invention relates to a device for enabling the use of a single radio frequency (RF) antenna on a mobile satellite transmission and reception station initially requiring two antennas.
Traditionnellement, deux antennes sont utilisées, une pour l'émission/réception via satellite (1525 à 1660.5 Mhz), l'autre pour positionner par GPS Li (1575.42 Mhz) la station mobile afin d'obtenir du satellite le meilleur signal d'émission/réception. Ceci implique l'installation des deux antennes avec deux câbles radio-fréquence avec toutes les contraintes associées (temps de montage, passage des câbles, encombrement, doublage des coûts). Les commutateurs/switch ou circulateurs traditionnels ne fonctionnent pas dans ce cas particulier à cause de la lenteur de commutation, l'isolation insuffisante des étages RF et les pertes importantes de signal RF (3db typiques hors connectique). Traditionally, two antennas are used, one for transmission / reception via satellite (1525 to 1660.5 MHz), the other to position by GPS Li (1575.42 MHz) the mobile station in order to obtain from the satellite the best transmission signal. /reception. This implies the installation of the two antennas with two radio frequency cables with all the associated constraints (installation time, cable routing, space requirement, cost doubling). The switches / switch or traditional circulators do not work in this particular case because of the slowness of switching, the insufficient insulation of the RF stages and the important losses of RF signal (3db typical except connections).
La station d'émission et réception satellite mobile a besoin de deux signaux à des moments précis distincts pour 20 établir les protocoles d'accès au satellite: - un signal satellite à la mise sous tension - puis un signal GPS pour situer géographiquement la station mobile par rapport aux faisceaux du satellite - puis à nouveau un signal satellite afin d'établir le protocole de transmission en émission et réception Par la suite, il peut être nécessaire à la station mobile d'acquérir à nouveau sa position géographique afin de vérifier que l'on est bien sous le bon faisceau du satellite. The mobile satellite transmitting and receiving station needs two signals at discrete precise times to establish the satellite access protocols: a satellite signal at power-up and then a GPS signal to geographically locate the mobile station relative to the satellite beams - and then again a satellite signal to establish the transmission protocol in transmission and reception Then it may be necessary for the mobile station to acquire again its geographical position to verify that the we are in the right beam of the satellite.
Le dispositif selon l'invention permet de remédier à l'inconvénient d'avoir deux antennes et deux câbles RF. Il - 2 - comporte un commutateur (switch) à haute isolation RF et à commutation rapide, qui permet de basculer automatiquement par détection des signaux RF soit sur la réception GPS, soit sur l'émission/réception satellite à partir d'une seule antenne. Un amplificateur permet d'obtenir un signal de qualité GPS suffisante. The device according to the invention overcomes the disadvantage of having two antennas and two RF cables. It features a high-isolation, fast-switching RF switch, which automatically switches RF signal detection to either GPS reception or satellite transmission / reception from a single antenna. . An amplifier provides a signal of sufficient GPS quality.
- Le schéma (figure 1) annexé illustre l'invention. The diagram (FIG. 1) appended illustrates the invention.
En référence à ce dessin, le commutateur comporte un étage de commutation (1) à faibles pertes à partir d'un circuit AsGa. Les pertes estimées sont au maximum de 0.6 db typiques hors connectique. La puissance minimale admise est de 10W RF. L'utilisation du circuit faible pertes permet de garder la puissance reçue et/ou émise tout en permettant une isolation suffisante pour éviter la destruction du récepteur (2) GPS et/ou de son amplificateur (3) en mode émission satellite (jusqu'à 7W RF émis). Il permet en outre une commutation inférieure à 100ps nécessaire au bon fonctionnement de la station mobile. With reference to this drawing, the switch comprises a switching stage (1) with low losses from an AsGa circuit. Estimated losses are at most 0.6 typical db excluding connectors. The minimum power allowed is 10W RF. The use of the low loss circuit makes it possible to keep the power received and / or emitted while allowing sufficient isolation to prevent the destruction of the receiver (2) GPS and / or its amplifier (3) in satellite transmission mode (up to 7W RF issued). It also allows switching less than 100ps necessary for the proper functioning of the mobile station.
Le signal GPS est amplifié directement sur le switch, à partir d'un transistor (4) à faible facteur de bruit de 0.8 db typique pour un gain de 15 db. Ceci permet d'utiliser des câbles RF de longueur plus importante. The GPS signal is amplified directly on the switch, from a transistor (4) low noise factor of 0.8 db typical for a gain of 15 db. This allows the use of RF cables of greater length.
Le pilotage du switch se fait par la détection de la commande du signal d'alimentation du GPS (5) sur la station mobile. The control of the switch is done by detecting the control of the GPS power signal (5) on the mobile station.
A titre d'exemple, le commutateur réalisé a des dimensions de 20mmm x 32mm x 3 mm hors connectique. For example, the switch made has dimensions of 20mmm x 32mm x 3 mm excluding connectors.
Le dispositif peut s'appliquer à toutes les station d'émission et réception satellite mobile nécessitant au départ deux antennes dans les bandes 1550-1690Mhz et L1 et plus particulièrement dans le domaine aéronautique. The device can be applied to all transmitting and mobile satellite receiving stations initially requiring two antennas in the bands 1550-1690Mhz and L1 and more particularly in the aeronautical field.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0410729A FR2876506A1 (en) | 2004-10-12 | 2004-10-12 | Single radio frequency antenna utilization permitting device for mobile satellite transmission and receiving station, has switch with high RF isolation and switching rapidly between satellite and GPS signals by detection of RF signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0410729A FR2876506A1 (en) | 2004-10-12 | 2004-10-12 | Single radio frequency antenna utilization permitting device for mobile satellite transmission and receiving station, has switch with high RF isolation and switching rapidly between satellite and GPS signals by detection of RF signals |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2876506A1 true FR2876506A1 (en) | 2006-04-14 |
Family
ID=34949478
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0410729A Pending FR2876506A1 (en) | 2004-10-12 | 2004-10-12 | Single radio frequency antenna utilization permitting device for mobile satellite transmission and receiving station, has switch with high RF isolation and switching rapidly between satellite and GPS signals by detection of RF signals |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2876506A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0729239A1 (en) * | 1995-02-24 | 1996-08-28 | Murata Manufacturing Co., Ltd. | Antenna sharing device |
US20030100333A1 (en) * | 2001-11-27 | 2003-05-29 | Randolph Standke | GPS equipped mobile phone with single shared antenna |
-
2004
- 2004-10-12 FR FR0410729A patent/FR2876506A1/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0729239A1 (en) * | 1995-02-24 | 1996-08-28 | Murata Manufacturing Co., Ltd. | Antenna sharing device |
US20030100333A1 (en) * | 2001-11-27 | 2003-05-29 | Randolph Standke | GPS equipped mobile phone with single shared antenna |
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