CN101425622B - Floor configuration having enhanced isolation degree between two antennas - Google Patents
Floor configuration having enhanced isolation degree between two antennas Download PDFInfo
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- CN101425622B CN101425622B CN 200810227073 CN200810227073A CN101425622B CN 101425622 B CN101425622 B CN 101425622B CN 200810227073 CN200810227073 CN 200810227073 CN 200810227073 A CN200810227073 A CN 200810227073A CN 101425622 B CN101425622 B CN 101425622B
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- crenel
- floor
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- microstrip antenna
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Abstract
The invention discloses a floor structure which can improve the isolation between antennas. A plurality of upper crenels and lower crenels with identical structures are arranged on the floor, the widths of the upper crenels and the lower crenels are equal, and a lower crenel is arranged between two adjacent upper crenels; conversely an upper crenel is arranged between two adjacent lower crenels; and a transmitting microstrip antenna and a receiving microstrip antenna are respectively connected with both ends of the floor. The floor structure improves the electromagnetic interference between airborne antennas. The method prolongs the transmission path of the electromagnetic wave between interference antennas, increases the attenuation loss of the electromagnetic wave, and can basically improve the isolation between the antennas in the acceptable antenna radiation characteristic distortion range.
Description
Technical field
The present invention relates to floor configuration between a kind of two microstrip antennas be used to being installed in parallel in the aircraft ventral and that have isolation between raising two antennas.
Background technology
Along with the development of electronics and the communication technology, the application of the wireless device of various functions is increasingly extensive.Especially aboard, in order to satisfy the needs such as communication, navigation, the quantity of antenna is multiplied on the airborne platform, and the multi-section antenna is worked in very little zone simultaneously, has caused serious electromagnetic interference.The main delivering path of electromagnetic interference is the coupling between antenna between radio system.For realizing the normal operation between each antenna, avoid the phase mutual interference, requirement reduces the harmful coupling between antenna.Therefore, improve isolation between antennas and become the precondition that realizes the compatible work of airborne antenna isoelectronic series system.In Practical Project, the measure of the raising isolation that requirement is taked should be protected the pneumatic property of aircraft as far as possible, and takies less the space of airborne platform as far as possible.
Referring to shown in Figure 1, be used for that the antenna that the relative altitude of 104 in ground object 103 and aircraft is surveyed is had emission microstrip antenna 101 and reception microstrip antenna 102.Emission microstrip antenna 101 and reception microstrip antenna 102 are generally and are installed in parallel in aircraft ventral 105 places, because unobstructed between two antennas, and two antennas at a distance of near (400～600mm) have caused disturbing mutually between two antennas so that not high to the detection accuracy of ground object 103, target is indefinite.
Above-mentioned two airborne antenna electromagnetic compatibility problem, its essential reason all is because emission microstrip antenna 101 is excessive or to receive microstrip antenna 102 too high in the Side direction receiving gain in the radiation intensity of side direction, thereby causes ground object 103 disconnected with the erroneous judgement of the relative altitude of aircraft 104.
Summary of the invention
In order to solve the emission microstrip antenna 101 that is installed in parallel in aircraft ventral 105 and the problem of disturbing mutually that receives microstrip antenna 102, the invention provides a kind of floor configuration that can improve emission microstrip antenna 101 and receive isolation between the microstrip antenna 102 that has.
The present invention is a kind of floor configuration that improves isolation degree between two antennas that has, and this floor is provided with the identical upper crenel of a plurality of structures, lower crenel, and the wide designs of buttress such as upper crenel and lower crenel employing, is provided with a lower crenel between per two upper crenels; Otherwise be provided with a upper crenel between per two lower crenels; The two ends on floor are connected with respectively the emission microstrip antenna, receive microstrip antenna.
Described floor configuration with raising isolation degree between two antennas, the length on its floor is that L, width are that h, thickness are w, the value of L is 100～600mm, the value of h is 0.4 λ～0.5 λ, λ represents to launch microstrip antenna (101) or receives the corresponding wavelength of microstrip antenna (102) operating frequency, and the value of w is 0.5～1mm.Crenel width d
2≈ λ/7, crenel degree of depth h
1≈ λ/4.The spacing d of two crenels
3=d
4+ d
5+ d
2, and d
4=d
5, d
3Represent the spacing between the leading edge of last crenel trailing edge and a rear crenel, d
4The A wing width of expression crenel, d
5The B wing width of expression crenel, and d
4=d
5=0.5d
2～1.5d
2
Described have a floor configuration that improves isolation degree between two antennas, and its floor can be " several " font, perhaps the floor half be " several " font, half is straight plate shape.
The present invention has the advantage of the floor configuration that improves isolation degree between two antennas: (1) has improved the electromagnetic interference between airborne antenna.The method has prolonged disturbs electromagnetic transmission path between antenna mutually, has increased electromagnetic attenuation loss, substantially can in acceptable antenna radiation characteristics distortion range, improve the isolation of two antennas.(2) well-known, there is very strict restriction the weight of airborne equipment, installation site, and the present invention adopts repetition formula " several " word floor form, can not increase aircraft weight, does not destroy the layout of airborne equipment.And simple in structure, be easy to realize.(3) floor and body are conformal, and be little on the impact of the pneumatic property of aircraft.
Description of drawings
Fig. 1 is the installation schematic diagram of two microstrip antennas.
Fig. 2 is the structure chart that the present invention has the floor configuration that improves isolation degree between two antennas.
Fig. 2 A is the size appointment schematic diagram that the present invention has the floor configuration that improves isolation degree between two antennas.
Fig. 3 be adopt that the floor panel structure of embodiment carries out disturb mutually s between antenna
12The parameter situation of change.
Fig. 4 is another structure chart that the present invention has the floor configuration that improves isolation degree between two antennas.
Among the figure: 1. under the upper crenel 12.A of floor 11.A under the upper crenel 14.B of crenel 13.B under the upper crenel 16.C of crenel 15.C the upper crenel 121.A wing 122.B wing 101. emission microstrip antennas 102. of crenel 17.D receive microstrip antennas 103. ground objects 104. aircrafts 105. aircraft ventrals
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Shown in Fig. 2, Fig. 2 A, the present invention is a kind of floor configuration that improves isolation degree between two antennas that has, and this floor is provided with the identical upper crenel of a plurality of structures, lower crenel, and the buttress such as upper crenel and lower crenel employing wide (be crenel width d
2Width equate) design, be provided with a lower crenel between per two upper crenels; Otherwise be provided with a upper crenel between per two lower crenels.The two ends on floor are connected with respectively emission microstrip antenna 101, receive microstrip antenna 102, and the spacing between the upper crenel 11 of A and the reception microstrip antenna 102 is d
1, the spacing between the upper crenel 17 of D and the emission microstrip antenna 101 is d
0, and d
1=d
0=d
2(adopting equidistant crenellation).The left end end on floor 1 is connected with and receives microstrip antenna 102, and the right-hand member end on floor 1 is connected with emission microstrip antenna 101; The top on floor 1 has the upper crenel 11 of A, the upper crenel 13 of B, the upper crenel 15 of C, the upper crenel 17 of D from left to right in turn; The bottom on floor 1 has under the A under crenel 12, the B crenel 16 under crenel 14, the C from left to right in turn; Under the upper crenel 11 of A, the upper crenel 13 of B, the upper crenel 15 of C, the upper crenel 17 of D, the A under crenel 12, the B under crenel 14, the C structure of crenel 16 identical.
In the present invention, the floor is a metal skin, is that to have length one be that L, width are that h, thickness are that the metal skin of w adopts crenel, lower crenel in the excision of machine cuts technique.The value of L is 100～600mm, and the value of h is 0.4 λ～0.5 λ (λ represents to launch microstrip antenna 101 or receives the corresponding wavelength of microstrip antenna 102 operating frequencies), and the value of w is 0.5～1mm.
The size relationship with the floor of improving isolation degree between two antennas among the figure is: (A) crenel width d
2≈ λ/7, crenel degree of depth h
1≈ λ/4; (B) the spacing d of two crenels
3=d
4+ d
5+ d
2, and d
4=d
5, d
3Represent the spacing between the leading edge of last crenel trailing edge and a rear crenel, d
4The wing A121 width of expression crenel, d
5The wing B122 width of expression crenel, and d
4=d
5=0.5d
2～1.5d
2
Embodiment:
Concrete structure is referring to shown in Fig. 2, Fig. 2 A.
Floor (metal skin) L=150mm, h=28mm (the operation wavelength λ of emission microstrip antenna 101 is about 70mm), w=1mm.
The upper crenel 11 of A and the spacing d that receives microstrip antenna 102
1=10mm, the upper crenel 17 of D and the spacing d that launches microstrip antenna 101
0=10mm.
(this rectangular opening is of a size of h to adopt machine cuts technique to excise a plurality of rectangular opening at the upper and lower edge of the metal skin of length L
1=18mm, d
2=10mm), namely the top of metal skin has the upper crenel 11 of A, the upper crenel 13 of B, the upper crenel 15 of C, the upper crenel 17 of D; The bottom of metal skin has under the A under crenel 12, the B crenel 16 under crenel 14, the C.The spacing d of the upper crenel 11 of A and the upper crenel 13 of B
3=30mm, then d
4, d
5Be respectively 10mm.
In order to verify above-mentioned floor panel structure, (minimalist configuration is CPU2GHz, internal memory 1GB, hard disk 40GB in a known computer; Operating system is windows2000/2003/XP.) in use take the HFSS Electromagnetic Simulation software of finite element algorithm (FEM) for the basis, set up the simulation model of emission microstrip antenna 101 to be analyzed, reception microstrip antenna 102.In this software, institute's established model is calculated, observe isolation and change.
Fig. 3 illustrate Application Example floor panel structure former and later two disturb mutually s between antenna
12The parameter situation of change.Wherein: solid line s when not adopting floor deformation
12Amplitude range :-27.44dB～-25.40dB; Dotted line represents to adopt s behind " several " word floor configuration
12Amplitude range then is-53.09dB～-50.63dB.By parameter comparison explanation, can improve isolation between two antennas by changing floor configuration.
The floor panel structure of the present invention's design, calculate discovery through HFSS Electromagnetic Simulation software: along with the design of " several " font floor deformation, isolation improves obviously; Consider engineering practice, can suitably adjust " several " font number.Calculate in this model and find, only carry out the design of " several " font floor deformation in a side, the straight plate of opposite side namely keeps original intactly plate structure constant (as shown in Figure 4), also can play the good effect that improves isolation.
Claims (2)
1. one kind has the floor configuration that improves isolation degree between two antennas; Be used for the antenna that the relative altitude between ground object (103) and aircraft (104) is surveyed is had emission microstrip antenna (101) and receives microstrip antenna (102); Emission microstrip antenna (101) and reception microstrip antenna (102) are installed in parallel in aircraft ventral (105) and locate, and be unobstructed between described two antennas, and described two antennas are at a distance of 400～600mm; It is characterized in that: this floor is provided with the identical upper crenel of a plurality of structures, lower crenel, and the wide designs of buttress such as upper crenel and lower crenel employing, is provided with a lower crenel between per two upper crenels; Otherwise be provided with a upper crenel between per two lower crenels; The two ends on floor are connected with respectively emission microstrip antenna (101), receive microstrip antenna (102); Described floor is " several " font;
The length on described floor is that L, width are that h, thickness are w, the value of L is 100～600mm, the value of h is 0.4 λ～0.5 λ, and λ represents to launch microstrip antenna (101) or receives the corresponding wavelength of microstrip antenna (102) operating frequency, and the value of w is 0.5～1mm;
Described crenel width d
2≈ λ/7, crenel degree of depth h
1≈ λ/4;
The spacing d of described two crenels
3=d
4+ d
5+ d
2, and d
4=d
5, d
3Represent the spacing between the leading edge of last crenel trailing edge and a rear crenel, d
4The A wing width of expression crenel, d
5The B wing width of expression crenel, and d
4=d
5=0.5d
2～1.5d
2
2. according to claim 1 have a floor configuration that improves isolation degree between two antennas, and it is characterized in that: the floor is metal skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810227073 CN101425622B (en) | 2008-11-20 | 2008-11-20 | Floor configuration having enhanced isolation degree between two antennas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810227073 CN101425622B (en) | 2008-11-20 | 2008-11-20 | Floor configuration having enhanced isolation degree between two antennas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101425622A CN101425622A (en) | 2009-05-06 |
| CN101425622B true CN101425622B (en) | 2013-01-30 |
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ID=40616050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810227073 Active CN101425622B (en) | 2008-11-20 | 2008-11-20 | Floor configuration having enhanced isolation degree between two antennas |
Country Status (1)
| Country | Link |
|---|---|
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2323216B1 (en) | 2009-11-12 | 2017-01-04 | Alcatel Lucent | Antenna apparatus and antenna selection method |
| CN103441325B (en) * | 2013-08-15 | 2015-08-19 | 华为技术有限公司 | A kind of communications antenna system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117786Y (en) * | 2007-08-30 | 2008-09-17 | 北京天瑞星际技术有限公司 | Antennae floor and antennae possessing antenna directivity diagram improving effect |
| CN101383449A (en) * | 2008-09-04 | 2009-03-11 | 北京航空航天大学 | Method for enhancing antenna separation degree |
-
2008
- 2008-11-20 CN CN 200810227073 patent/CN101425622B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117786Y (en) * | 2007-08-30 | 2008-09-17 | 北京天瑞星际技术有限公司 | Antennae floor and antennae possessing antenna directivity diagram improving effect |
| CN101383449A (en) * | 2008-09-04 | 2009-03-11 | 北京航空航天大学 | Method for enhancing antenna separation degree |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101425622A (en) | 2009-05-06 |
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