EP1927158A1 - Systeme antennaire pour liaison ionospherique continue - Google Patents
Systeme antennaire pour liaison ionospherique continueInfo
- Publication number
- EP1927158A1 EP1927158A1 EP06793639A EP06793639A EP1927158A1 EP 1927158 A1 EP1927158 A1 EP 1927158A1 EP 06793639 A EP06793639 A EP 06793639A EP 06793639 A EP06793639 A EP 06793639A EP 1927158 A1 EP1927158 A1 EP 1927158A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- angle
- ground
- diplexer
- band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- 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
- H01Q11/06—Rhombic antennas; V-antennas
Definitions
- the invention relates in particular to a broadband antenna system for ionospheric linkage.
- the system is intended, for example, for high frequency radiofrequency radio stations to provide ionospheric reflection links in a continuous manner over distances ranging from 0 to 5000 Kms, so without a zone of silence (usually designated by the Anglo-Saxon expression "skip zone").
- NVIS type abbreviation of Near Vertical Incidence Skywaves
- wideband antennas such as Ve-inclined to resistive loads (or Loaded Inverted Vee)
- the dipole-folded antenna with resistive loads • for medium distances 500-2000 Kms, to implement, usually vertically polarized antennas, in particular so-called broad-wave antennas. band like the conic or the biconical,
- Vé-inclinée (known under the term Anglo-Saxon Sloping Vee) whose structure is detailed in Figure 1.
- a broadband antenna system having at least one first high frequency antenna, BPs frequency band, covering long distances and a second low frequency antenna, BPb frequency band, for short and medium distances, the frequency band BPb being lower than the band BPs, a radio station characterized in that it comprises at least one feeder adapted to supply both antennas simultaneously.
- the first antenna is for example an inclined V-type antenna composed of two conducting strands starting from the top of a support mast and joining the ground forming an angle whose projection on the ground is designated ⁇ and the second antenna is of type Vé-inclined composed of 2 conductive strands starting from the top of the support mast and joining the ground forming an angle whose projection on the ground is designated ⁇ and the value of the angle ⁇ is greater than ⁇ and a means of connection between the post radio and the power device.
- the antennal structure ensures short, medium and long distance radio links from 0 to 5000 Kms by ionospheric reflection in the 2-30 MHz HF band,
- the antenna needs only a support mast, which allows for low cost equipment and rapid deployment, unlike systems involving the use of multiple support poles, •
- the antenna is compact and therefore easily transportable. It is well suited for tactical radio stations that are to be moved frequently.
- FIG. 1 a diagram of a Vé-inclined antenna
- FIG. 2 a basic representation of the antennal system
- FIG. 3 a representation of a device for feeding the antenna system
- FIG. 1 represents an example of an inclined V ⁇ antenna.
- the Ve-inclined antenna consists of two conducting strands (a) and (b) placed above the ground plane P.
- the first ends of the strands (a) and (b), respectively (ai) and (b1), are raised above the ground by a height H, by any known usual means, such as a support mast for example, and constitute the feed points of the antenna.
- the second ends of the strands (a) and (b), respectively (a2) and (b2) are placed close to the ground and spaced from each other by a distance D chosen according to the characteristics required on the antenna .
- These ends are connected to the ground plane through the resistors Ra and Rb by connecting one of the outputs of these resistors respectively to the ends (a2) and (b2) and the other output to a grounding device M not shown, for example a ground rod, a ground wire etc ..
- FIG. 2 represents an example of a system according to the invention.
- the antennal system according to the invention comprises for example:
- a first set designated antenna 1 Vé-inclined type consisting of 2 conductive strands 1 a, 1 b starting from the top S of the support mast and joining the ground at an angle whose projection on the ground is designated ⁇ .
- the value of the angle ⁇ is small and for example between 25 ° and 50 °.
- the ends a, Vb ground side of these 2 strands are brought into contact with the ground through a load resistance of about 300 to 600 ohms and a grounding equipment not shown in the figure.
- Both ends 1 "a, 1" b side masthead form the 2 feed points 10a, 10b of the antenna 1 ( Figure 3).
- the radiating strands have a length chosen so that the radio gain of this antenna is maximum in the upper part of the HF band.
- the part of the RF band concerned is, for example, the band varying from 6 to 30 MHz, a high frequency band designated BPs, • a second set designated antenna 2 of the Ve-inclined type is composed of 2 conducting strands 2a, 2b starting from the top of the support mast and joining the ground forming an angle whose projection on the ground is designated ⁇ , different from the angle ⁇ .
- the two ends 2 "a, 2" b side masthead form the 2 feed points January 1, 1 January 1 of the antenna 2 ( Figure 3).
- the ground ends 2'a, 2'b of these 2 strands are placed in contact with the ground through a load resistor.
- the angle ⁇ is more open than the angle ⁇ , ⁇ is greater than ⁇ .
- the length of the radiating strands 2a, 2b is chosen so that its efficiency is sufficient in the lower part of the HF band.
- the value of the angle ⁇ is between 180 and 90 °.
- the part of the RF band concerned varies, for example, from 2 to 8 MHz, a low frequency band designated BPb with respect to the HF band, a high frequency band designated BPs.
- the diplexer 5 comprises in particular an input 8 (FIG. 3) and corresponding outputs, one 5h high channel at the top of the HF band and the other 5b low channel at the bottom of the HF band. . They are connected respectively to the antenna 1 and the antenna 2.
- FIG. 3 schematizes an exemplary structure for the feeder.
- the latter comprises a symmetrical diplexer 5 of which:
- the 5h high channel output (high pass filtering) is connected to the two feed points 10a, 10b of the antenna 1
- the low path output 5b (low pass filtering) is connected to the two feed points 1 1 a, 1 1 b of the antenna 2
- the input 8 is connected for example by means of a two-wire power cable 9 to the radio station 4.
- connection to the radio is done by a coaxial asymmetric system.
- FIGS. 4 and 5 show two alternative embodiments comprising a balun impedance transformer.
- FIG. 4 comprises, between the radio station 4 and the diplexer 5, a coaxial 12 and a balun impedance transformer 13 having in particular the function of balun and impedance matching of the line 9.
- the balun transformer is combined with the diplexer 5.
- the coaxial output of the balun transformer 13 makes it possible to directly connect the radio station 4 by a coaxial cable 14 without the use of a two-wire power cable.
- Figure 6 shows an embodiment of the feeding device.
- the high-pass filtering is provided for example by one or more capacitors Ci between the two-wire 9 and the inputs 10a and 10b of the antenna 1.
- the low-pass filtering is provided by one or more Li chokes between the two-wire 9 and the inputs 1 1a, 11b of the antenna 2.
- the support mast has for example a height of 15 meters. It is made of reinforced plastic-fiberglass insulation so to allow the use of two-wire transmission line.
- the antenna 1 consists for example of two 75 m radiating conductor strands.
- the projected apex angle value is 35 ° and the load resistance is 360 ohms.
- the antenna 2 consists for example of two 75 m radiating conductor strands.
- the projected apex angle value is 180 ° and the load resistances are 360 ohms.
- the diplexer comprises two capacities of 10OpF and two inductances having the value 10 ⁇ H.
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 |
|---|---|---|---|
| FR0509596A FR2891092B1 (fr) | 2005-09-20 | 2005-09-20 | Systeme antennaire pour liaison ionospherique continue. |
| PCT/EP2006/066503 WO2007033961A1 (fr) | 2005-09-20 | 2006-09-19 | Systeme antennaire pour liaison ionospherique continue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1927158A1 true EP1927158A1 (fr) | 2008-06-04 |
| EP1927158B1 EP1927158B1 (fr) | 2009-10-28 |
Family
ID=36283080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06793639A Active EP1927158B1 (fr) | 2005-09-20 | 2006-09-19 | Systeme antennaire pour liaison ionospherique continue |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1927158B1 (fr) |
| DE (1) | DE602006010096D1 (fr) |
| ES (1) | ES2335138T3 (fr) |
| FR (1) | FR2891092B1 (fr) |
| WO (1) | WO2007033961A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL215002A (en) * | 2011-09-06 | 2013-02-28 | Elbit Systems Ltd | Hf antenna assembly |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2758300A (en) * | 1951-08-25 | 1956-08-07 | Thaddeus J Dylewski | Radio antenna |
| US3757341A (en) * | 1964-03-26 | 1973-09-04 | Sanders Associates Inc | Long wire v-antenna system |
| AU5909080A (en) * | 1979-06-08 | 1980-12-11 | Rudolf J.F. Guertler | Travelling wave antenna |
| JPS59108405A (ja) * | 1982-12-14 | 1984-06-22 | Mitsubishi Electric Corp | アンテナ装置 |
-
2005
- 2005-09-20 FR FR0509596A patent/FR2891092B1/fr not_active Expired - Fee Related
-
2006
- 2006-09-19 ES ES06793639T patent/ES2335138T3/es active Active
- 2006-09-19 DE DE602006010096T patent/DE602006010096D1/de active Active
- 2006-09-19 WO PCT/EP2006/066503 patent/WO2007033961A1/fr not_active Ceased
- 2006-09-19 EP EP06793639A patent/EP1927158B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007033961A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1927158B1 (fr) | 2009-10-28 |
| FR2891092A1 (fr) | 2007-03-23 |
| DE602006010096D1 (de) | 2009-12-10 |
| ES2335138T3 (es) | 2010-03-22 |
| WO2007033961A1 (fr) | 2007-03-29 |
| FR2891092B1 (fr) | 2007-11-23 |
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