CN101069325B - Linear high frequency antenna - Google Patents
Linear high frequency antenna Download PDFInfo
- Publication number
- CN101069325B CN101069325B CN2005800303997A CN200580030399A CN101069325B CN 101069325 B CN101069325 B CN 101069325B CN 2005800303997 A CN2005800303997 A CN 2005800303997A CN 200580030399 A CN200580030399 A CN 200580030399A CN 101069325 B CN101069325 B CN 101069325B
- Authority
- CN
- China
- Prior art keywords
- rectangular tube
- power splitter
- high frequency
- dielectric
- frequency antenna
- 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 - Fee Related
Links
- 230000001939 inductive effect Effects 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920002313 fluoropolymer Polymers 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0075—Stripline fed arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/22—Longitudinal slot in boundary wall of waveguide or transmission line
-
- 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
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
Implementing an investment strategy to be executed for an individual investor in a single financial contract, covering a plurality of assets. The assets underlying the financial contract are managed using at least a tactical and a strategic asset allocation model. Information regarding risk tolerance, investing time horizon and investment needs of the investor is used to determine (i) a combination of tactical and strategic asset allocation models to manage the assets in the contract; and (ii) a relative percentage of allocation of the assets between the tactical and strategic asset allocation models.
Description
Technical field
The present invention relates to the UHF radio engineering, can apply the present invention to the exploitation of wire antenna peace plate antenna array in the radio positioning system (for example surveillance radar).
Background technology
Widely used slotted guide antenna in radio position finding radio directional bearing (" the VHF antennas " of G.Z.Izenberg or the like, second portion, the 177th～205 page, " Communication " publishing house, M., 1997; Russ P SU 1746444, RU 2206157) be a kind of on narrow limit or the broadside apertured rectangular waveguide that periodically distributes.There is the slotted guide antenna of inclined slot simple in structure on the narrow limit of waveguide, but many shortcomings are arranged: limited bandwidth (10%); Exist because the resonance that the dispersion characteristics of waveguide and slit series connection cause; Average coupling coefficient maximum is no more than 10dB, and adjacent slits exists efficient low (80～90%) and antenna pattern sidelobe level height (when particularly slit quantity is few) under the situation at relative tilt angle; In the process of in frequency band, working along undesirable underdevelopment of waveguide main beam.In addition, in the decimeter wave frequency band, use slotted guide antenna also to be subject to weight and volume, because the cross sectional dimensions of waveguide is directly proportional with wavelength.
When using the double slit crack (U.S. Pat 3740751), these characteristics of bandwidth and efficient all are improved.But these measures all can not overcome because the series connection in slit and the major defect that inclination brings.
Usually reactive components (for example inductance oscillator) is used for the excitation (" VHF Antennas ", the 181st page) of straight slot on the Narrow Wall of Waveguide limit.This measure can overcome the shortcoming that the slit tilts to bring, but has increased the complexity of structural design, and this complexity is always unacceptable.
The structure of printer belt wire antenna has more importantly characteristic (Russ P SU1835974; " the Printed-stripline vibrator phased arraysof L and S-frequency bands " of V.V.Demidov or the like, antenna publishing house, the 9th (55) edition, the 3rd～8 page, 2001).This antenna all is made up of the printing splitter with wire of in-phase output end connection printer belt linear oscillator usually.
These antenna has many shortcomings: complex contour, and the input loss height, and power capacity is lower.
Summary of the invention
The objective of the invention is to expand the technological means of weaponry, and improve operating characteristic.
Utilize the present invention can minification, the simplified structure design improves the electric property of antenna.
Basic thought of the present invention is the power splitter (" Referencebook for calculation and designing of SHF devices " that adopts on the asymmetric band line, I.V.Volman, M. edit, " Radio and Communication " publishing house, 1982), it is placed on the broadside in the rectangular tube, the radiator of the periodic arrangement of emitter window form is arranged on the narrow limit of rectangular tube.The Connection Element of radar is taked the form of capacitive character or inductive oscillator, at another narrow limit 0.25 λ of distance rectangular tube
0(the λ wherein of place
0Be mean wavelength).
Description of drawings
The structure of one of Fig. 1～2 explanation wire antennas possibility schemes, this antenna has parallel connection type multichannel power splitter, T-type coupler and capacitor type oscillator.This structure of wire antenna can partly realize at the long wave of decimeter wave frequency band at an easy rate.
These wire antenna schemes with bending multichannel power splitter and inductive type oscillator are more suitable for partly working at the shortwave of decimeter wave and centimeter wave, see Fig. 3 and 4.
Multichannel power splitter with the continuous system of being arranged in, and use each wire antenna scheme of directional coupler or T-type coupler to be suitable in comprising the broad frequency range of metric wave, working, see Fig. 5 and 6.
Embodiment
The present invention's (seeing Fig. 1 and 2) is made up of rectangular tube 1 (needing not to be waveguide), and multichannel power splitter 2 is to make on the asymmetric band line with base of dielectric 3 (utilizing for example foamed plastics making), is placed on the broadside of rectangular tube 1 inside.
The conductor of multichannel power splitter 2 utilizes thin slice (1～2 millimeter) to make, and for example makes of duralumin, hard alumin ium alloy, compares with printed conductor, does like this and can reduce the wastage, and improves power capacity.The economy of doing like this is conspicuous, because utilize present computer technology can produce the low cost structure of slightly more complicated.
Input coaxial connector 4 is positioned at narrow limit one side of rectangular tube, is fixed on the narrow limit with seat 5.
In order to receive differential path, be connected to the input of multichannel power splitter 2 with " hybrid ring " type Biodge device 6 with this wire antenna.The difference arm 7 of Biodge device 6 is drawn by the broadside of rectangular tube 1.
In this multichannel power divider structure, be that decline by T-type coupler 8 output arm wave impedance realizes that these wave impedance depend on the width W of conductor along the in fact widely used irregular distribute power of wire antenna
1And W
2
In order to reduce the cross sectional dimensions of wire antenna, with width W
0The multichannel power splitter main transmission line impedance of decision is chosen as and equals 100 ohm, and the cross sectional dimensions here is very important for working in the decimeter wave frequency band.Connect 9 with ladder and mate multichannel power splitter and 50 ohm of inputs 4.Periodic radiator system comprises the slit window of leaving on the rectangular tube 1 narrow limit 10.Utilization is approximately equal to 0.25 λ with the distance L on the narrow limit of rectangular tube
0(λ
0Be mean wavelength) capacitive character oscillator 11 systems, realize the electrical couplings between the output of emitter window 10 and multichannel power splitter 2.According to following condition select between the emitter window 10 and between the adjacent output of multichannel power splitter apart from d, and the width C of emitter window:
0.5λ
0＜d＜λ
0
The selection that found through experiments the emitter window width C can influence the coupling of antenna.The optimal selection of width C is at 0.5 λ
0To 0.75 λ
0Scope within.Emitter window height S is not very important, can be selected to the height b that is less than or equal to rectangular tube 1.The width a of rectangular tube is chosen as at 0.25 λ
0To 0.5 λ
0Scope within.
The cross sectional dimensions of multichannel power splitter does not rely on operation wavelength, mainly by asymmetric band linear dimension h and the decision of t (see figure 2).Therefore, the quality of wire antenna and overall size reduce along with the raising of operating frequency.
Explanation is used for the wire antenna scheme of working on short wavelength more in Fig. 3 and 4.Oscillator 11 is approximately equal to 0.25 λ with the distance L on rectangular tube 1 narrow limit
0This necessary condition is to utilize 180 degree of multichannel power splitter output arm curved satisfied.
As shown in Figure 4, it can be inductive (found through experiments) oscillator 12 of launching electric wave.In other words, it is connected to the broadside of rectangular tube 1.
For wire antenna can both be worked under various environment, the inner chamber of rectangular tube 1 is filled by the encapsulated dielectric that can see through radio wave, for example, utilize foamed plastics to fill (as shown in Figure 2), perhaps utilize the dielectric 13 that can see through radio wave to fill emitter window 10, for example utilize fluoroplastics to fill (as shown in Figure 4).
Fig. 5 illustrates that there is the structure of the wire antenna of input coaxial connector 4 at multichannel power splitter center.In 2 two mirror image branchings of multichannel power splitter any one all is to utilize the power splitter of directional coupler 14 realizations with quarter-wave coupled section.Coupling coefficient with directional coupler 14 of quarter-wave coupling is determined by the clearance delta between main line and the by-pass conductor.Directional coupler 14 is to equal λ
0Separate apart from K, do the Phase synchronization that can obtain multichannel power splitter output like this.Determining by T-type coupler 8 between the adjacent output of multichannel power splitter apart from d, and equal λ
0Emission by window 10 is to be approximately equal to 0.25 λ by the distance L with rectangular tube 1 narrow limit
0Capacitive character and inductive oscillator 11 or 12 provide.
Having drawn in Fig. 6 has continuous multichannel power splitter, and only is to use another program of the wire antenna of T-type coupler 8 and 15 therein.The key dimension L of this multichannel power splitter, d and K have a same implication with the same in the wire antenna scheme of describing among Fig. 5.
With cross sectional dimensions is that to make operation wavelength be 30 centimetres wire antenna for 110 * 55 square millimeters waveguide.Making the four-way power splitter with the band line, wherein highly is the h=5 millimeter, conductor thickness t=1mm (seeing Fig. 1 and 2).When the wave impedance of coaxle input end equaled 50 ohm, in the frequency band of 1.0～1.20GHz, the voltage standing wave ratio of wire antenna was no more than 1.5.
Claims (5)
1. linear high frequency antenna, by the multichannel power splitter, periodically the Connection Element between the output of the system of radiator and described radiator and described multichannel power splitter is formed, this multichannel power splitter is to realize having on the band line of base of dielectric, be arranged in the rectangular tube, it is characterized in that:
Be arranged in the rectangular tube on one of broadside, have the multichannel power splitter of realizing on the asymmetric band line of base of dielectric, the width of this rectangular tube is chosen as at 0.25 λ
0To 0.5 λ
0Scope within, λ wherein
0It is mean wavelength;
The system of described periodicity radiator realizes that with the form that emitter window is gone up on one of narrow limit of described rectangular tube the width of each emitter window equals 0.5 λ
0
Described Connection Element is to realize that with the form of capacitive character or inductive oscillator these oscillators are equaling 0.25 λ
0Last another the narrow limit of distance away from this rectangular tube, according to condition 0.5 λ
0＜d＜λ
0Select between the described emitter window and the adjacent output of described multichannel power splitter between apart from d.
2. linear high frequency antenna as claimed in claim 1 is characterized in that the inner chamber of described rectangular tube is filled with the encapsulated dielectric that can see through radio wave.
3. linear high frequency antenna as claimed in claim 2 is characterized in that the described encapsulated dielectric that can see through radio wave is a foamed plastics.
4. linear high frequency antenna as claimed in claim 1 is characterized in that described emitter window is with filling through the dielectric of radio wave.
5. linear high frequency antenna as claimed in claim 4 is characterized in that the described dielectric that can see through radio wave is fluoroplastics.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2004126988 | 2004-09-09 | ||
| RU2004126988/09A RU2279741C2 (en) | 2004-09-09 | 2004-09-09 | Microwave uniform linear array |
| PCT/RU2005/000243 WO2006031149A1 (en) | 2004-09-09 | 2005-05-05 | Linear high frequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101069325A CN101069325A (en) | 2007-11-07 |
| CN101069325B true CN101069325B (en) | 2011-06-01 |
Family
ID=36050608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800303997A Expired - Fee Related CN101069325B (en) | 2004-09-09 | 2005-05-05 | Linear high frequency antenna |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101069325B (en) |
| RU (1) | RU2279741C2 (en) |
| WO (1) | WO2006031149A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2727348C1 (en) * | 2019-04-26 | 2020-07-21 | Акционерное общество "Всероссийский научно-исследовательский институт радиотехники" | Stripline slot linear antenna array |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107419A (en) * | 2013-01-30 | 2013-05-15 | 南京邮电大学 | Combined dual-frequency broadband antenna with zigzag feed structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4409595A (en) * | 1980-05-06 | 1983-10-11 | Ford Aerospace & Communications Corporation | Stripline slot array |
| RU2024129C1 (en) * | 1990-11-29 | 1994-11-30 | Завод "Красное Знамя" | Flat slot array |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2004129C1 (en) * | 1991-07-26 | 1993-12-15 | Bobochkov Aleksej I | Pruning shears |
-
2004
- 2004-09-09 RU RU2004126988/09A patent/RU2279741C2/en active
-
2005
- 2005-05-05 WO PCT/RU2005/000243 patent/WO2006031149A1/en active Application Filing
- 2005-05-05 CN CN2005800303997A patent/CN101069325B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4409595A (en) * | 1980-05-06 | 1983-10-11 | Ford Aerospace & Communications Corporation | Stripline slot array |
| RU2024129C1 (en) * | 1990-11-29 | 1994-11-30 | Завод "Красное Знамя" | Flat slot array |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2727348C1 (en) * | 2019-04-26 | 2020-07-21 | Акционерное общество "Всероссийский научно-исследовательский институт радиотехники" | Stripline slot linear antenna array |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2004126988A (en) | 2006-02-20 |
| WO2006031149A1 (en) | 2006-03-23 |
| CN101069325A (en) | 2007-11-07 |
| RU2279741C2 (en) | 2006-07-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 |
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| CF01 | Termination of patent right due to non-payment of annual fee |