CN101071902B - Antenna device of monitoring unit for monitoring system - Google Patents
Antenna device of monitoring unit for monitoring system Download PDFInfo
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- CN101071902B CN101071902B CN2006100788299A CN200610078829A CN101071902B CN 101071902 B CN101071902 B CN 101071902B CN 2006100788299 A CN2006100788299 A CN 2006100788299A CN 200610078829 A CN200610078829 A CN 200610078829A CN 101071902 B CN101071902 B CN 101071902B
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- underarm
- upper arm
- branch line
- antenna
- monitoring unit
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Abstract
The invention advances an antenna device for monitoring unit in a monitoring system, comprising: medium plate, antenna structure, and coaxial cable, where the plane of the medium plate is printed with antenna structure; the antenna structure comprises: a rectangular upper arm, an inverted-mountain lower arm, and connecting part between the two arms; the connecting part comprises: feed part and impedance matching network; the internal conductor of the coaxial cable is connected with the upper arm and the outer conductor is connected with the middle branch of the lower arm. And the invention implements low section property and can more effectively use internal space of the monitoring unit to miniaturize the monitoring unit; and the invention can make it flexible to install internal antenna of the monitoring unit and offer better frequency bandwidth and all-directionality.
Description
Technical field
The present invention relates to the antenna assembly in a kind of communication field, relate in particular to the antenna assembly that is used for monitoring unit in the wireless remote control system.
Background technology
Along with the raising of people's living standard and developing rapidly of the communication technology, a lot of line communication systems develop into wireless communication system, wireless remote control system wherein occurred.
The wired remote monitoring technique in past is that one or more monitoring unit (as video camera) is installed in the monitoring place, be connected with monitor terminal by cable networks such as optical fiber, coaxial cable, telephone wires, the user receives image and the sound of watching the distant place that is obtained by monitoring unit by monitor terminal.
This technology requires than higher the monitoring place, and as having optical fiber, coaxial cable, telephone line interface, system's installation and maintenance is also relatively more difficult; The user can't monitor whenever and wherever possible, as watching the situation in monitoring place by modes such as PC, landline telephone, industrial computers; Monitoring unit is found easily, thereby influences the accuracy of monitored results.
Wireless remote control system by wireless network and user's communicating terminal communication, is accepted user's control commands after one or more monitoring unit is installed in the monitoring place, transmits the image and the voice messaging that photograph.As: CN 021118510.7, CN200611029861.6, CN031311035.10.
Wherein, user communication terminal can be mobile phone (3G mobile, GSM mobile handset, GPRS mobile phone, CDMA mobile phone or PHS mobile phone), individual palmtop PC or PC etc., wireless network is the grid platform consistent with the user communication terminal type, as 3G network platform, the GSM network platform, GPRS network platform, cdma network platform, the PHS network platform, WLAN (wireless local area network), internet etc.
Indispensable in the wireless remote control system is antenna, and monitoring unit must and receive the space electromagnetic wave by day alignment space radiation electromagnetic wave, sends received signal, thus swap data and information.Along with the raising of and security requirement disguised, many requirements have been proposed for size, monitoring unit inner space, infield and the mounting means etc. of monitoring unit to monitoring unit.Do the camera little, that monitoring unit is inner as: monitoring unit volume as far as possible and want and can monitor the guarded region Three dimensional rotation, monitoring unit can be installed to corner work, and monitoring unit can suspension work etc.Accordingly, these are also had higher requirement to antenna structures that monitoring unit uses, and as antenna size or take up room can not be too big, the omni-directional of antenna will wait well, has therefore limited the application of a lot of traditional antenna structures.
For example: planar inverted-F antenna (PIFA) needs corresponding height could satisfy the requirement of the beamwidth of antenna; Monopole or helical antenna with certain-length must directly link to each other with planar circuit board (PCB), and the stratum of adopting PCB is as the ground part; General dipole antenna directly uses coaxial line in two arm apex drives, owing to be non-equilibrium structure, antenna is subjected to coaxial line, and is bigger as the influence of axial length, narrower with Time Bandwidth.
Therefore, in wireless remote control system, the problem that need to solve is how in small-sized monitoring unit, provides to connect and antenna flexible for installation, and the while can provide reasonable frequency bandwidth and isotropic electric property again.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing antenna technology, a kind of low profile antenna structure easy for installation is provided, be specifically related to be used in a kind of supervisory control system the antenna assembly of monitoring unit.
The present invention specifically is achieved in that
Be used for the antenna assembly of monitoring unit in a kind of supervisory control system, comprise: dielectric-slab, antenna structure, coaxial line;
It is characterized in that:
The printed antenna structure is arranged on the plane of described dielectric-slab;
Described antenna structure comprises: the coupling part between rectangle upper arm, underarm of falling the chevron, two arms;
Described coupling part comprises: feed part and impedance matching network, the feed part combines with impedance matching network, by welding manner make that the inner wire of coaxial line and upper arm are electrically connected, the intermediate section branch line of outer conductor and underarm is electrically connected.
The medial fascicle line length of described underarm is close with underarm both sides branch line length, the outer conductor of coaxial line is welded to the intermediate section branch line fixes coaxial line.
Impedance matching network in the described coupling part, by increasing a metal rectangular, the upper part of underarm both sides branch line is respectively extended a bit of, form a π type matching network and realize the impedance matching of antenna, described metal rectangular, branch line upper part, underarm both sides are respectively extended a bit of and the corresponding position of upper arm end portion is pad, are the Surface Mount electric capacity or the inductance component of impedance matching network between the pad;
Feed part in the described coupling part, with the inner wire of coaxial line be welded on the metal rectangular, whole section welding of intermediate section branch line of outer conductor and underarm.
The width of described intermediate section branch line is regulated center of antenna frequency and increased bandwidth more than or equal to the external diameter of coaxial line by Surface Mount electric capacity or the inductance component of adjusting impedance matching network.
Described underarm on one side the branch line upper part extend a bit of and upper arm end portion pad between open a way, that extend described underarm another side branch line upper part is a bit of, mount Surface Mount electric capacity or inductance component between metal rectangular and the upper arm end portion pad, realizes L type impedance matching network.
Branch line upper part, described underarm both sides respectively extend a bit of and upper arm end portion pad between open a way, mount Zero-ohm resistor or fill up metal forming between metal rectangular and the upper arm end portion pad;
Realize impedance matching by the spacing of adjusting upper arm length, underarm both sides branch line length and both sides branch line inner side edge.
Between the inner wire of described upper arm and coaxial line directly by being weldingly connected.
Impedance matching network in the described coupling part, fold line form by the employing of upper arm end portion, increase a metal rectangular, underarm branch line upper part on one side extends a bit of, form L type matching network and realize the impedance matching of antenna, described metal rectangular, underarm branch line upper part are on one side extended and a bit ofly are pad with the corresponding position of upper arm end portion, are the Surface Mount electric capacity or the inductance component of impedance matching network between the pad;
Feed part in the described coupling part, with the inner wire of coaxial line be welded on the metal rectangular, whole section welding of intermediate section branch line of outer conductor and underarm.
Regulate the center of antenna frequency and increase bandwidth by Surface Mount electric capacity or the inductance component of adjusting impedance matching network.
Under identical antenna index request, reduce upper arm length, the entire antenna structure length is shortened.
Described underarm on one side the branch line upper part extend a bit of and upper arm end portion pad between open a way, mount Zero-ohm resistor or fill up metal forming between metal rectangular and the upper arm end portion pad;
Can realize impedance matching by length, upper arm end portion fold line form, the length of underarm both sides branch line and the spacing of two branch line inner side edges of adjusting upper arm.
Between the inner wire of described upper arm and coaxial line directly by being weldingly connected.
Underarm medial fascicle line length is shorter in the described antenna structure, is used for welding a bit of near the feed part of the outer conductor of fixing coaxial line, increases by one section type metal line at the bottom part of the bearing of trend of intermediate section branch line, is used to weld coaxial outer conductor.
The beneficial effect of antenna assembly of the present invention: compare with common PIFA antenna, realized low section characteristic, can more effectively utilize the monitoring unit volume inside, be convenient to realize the miniaturization of monitoring unit; The feed and the dipole antenna that are different from monopole antenna, antenna feed can be connected on the PCB by coaxial line, the length of coaxial line can be according to antenna and PCB position apart from selection under satisfying system loss requires to cable, bring the flexibility of monitoring unit inside antenna installation site, can provide reasonable frequency bandwidth and omni-directional simultaneously.
Description of drawings
Fig. 1 is the structural representation of antenna of the present invention;
Fig. 2 is an antenna specific embodiment one of the present invention;
Fig. 3 is an antenna specific embodiment two of the present invention;
Fig. 4 is an antenna specific embodiment three of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 1 is the structural representation of antenna assembly of the present invention, and on a plane of dielectric-slab 4, antenna structure is divided into 3 parts: the rectangle upper arm 1 of antenna, the underarm 2 and the coupling part 3 of falling " mountain " shape.Fig. 1 bend dash area represents it is metal.Coupling part 3 comprises feed part 5 and impedance matching network 6.
Antenna structure on the described dielectric-slab plane can be in different ways when practical structures realizes.Impedance matching network 6 in upper arm 1, underarm 2 and the coupling part 3 is printed on the dielectric-slab 4 when realizing; Feed part 5 in the coupling part 3 is when realizing, combining with impedance matching network 6 makes by welding manner that the inner wire 8 of coaxial line 7 is electrically connected with upper arm 1, outer conductor 9 is electrically connected with the intermediate section branch line 10 of underarm 2.
Another kind of similarly structure is, do not have type metal line 18 (see figure 4)s, and the branch line length on the length H2 of the intermediate section branch line 10 of underarm 2 and underarm 2 both sides is close, and employing is welded to intermediate section branch line 10 with the outer conductor of coaxial line and fixes coaxial line.
Figure 2 shows that the specific embodiment of the invention one, outside upper arm 1 that has antenna on the printed medium plate 4 and underarm 2, when realizing the impedance matching network 6 in the coupling part 3, left side branch line 11 by increasing a metal rectangular 16 and underarm 2, the upper part of right branch line 12 are extended a bit of separately, form a π type matching network and carry out the impedance matching of antenna.The both sides branch line 11 and 12 of described metal rectangular 16, underarm 2 extends a bit of separately and the corresponding position of upper arm 1 end portion is pad, be six black shade parts among the figure, 13,14,15 parts between the described pad are the Surface Mount electric capacity or the inductance component of impedance matching network 6.
When realizing the feed part 5 in the coupling part 3, with the inner wire 8 of coaxial line be welded on the metal rectangular 16, outer conductor 9 and 10 whole sections welding of underarm 2 intermediate section branch lines.The width of intermediate section branch line 10 is D1, and the external diameter of coaxial line is φ 1, and D1 〉=φ 1.Like this, can regulate center of antenna frequency and increased bandwidth by electric capacity or the inductance of adjusting impedance matching network 6.This structure also can realize L type impedance matching network, as long as with 13 (or 15) part open circuit, other 14,15 (or 13) part mounts electric capacity or inductance.
When actual design is produced, reserve π type impedance matching network, according to impedance matching situation kind of design.Under the situation that size allows, if (D2＞D1) can realize impedance matching, 13,15 parts can be opened a way, 14 parts can mount Zero-ohm resistor or fill up with metal forming for the length H2 of length H1, left side branch line 11 and right branch line 12 by adjusting upper arm 1 and the space D 2 of two branch line inner side edges.Because 13,15 parts are opened a way, 14 parts are again to mount Zero-ohm resistor or fill up with metal forming, so during specific implementation PCB antenna plate, upper arm 1 can directly link to each other with inner wire 8, is printed as a whole metal pattern.
Figure 3 shows that the specific embodiment of the invention two, when realizing the impedance matching network 6 in the coupling part 3, the fold line form 17 that the end portion of upper arm 1 adopts, by increasing a metal rectangular 16, the left side branch line 11 constant length of underarm 2 are H2, it is H3 that a bit of length is extended in the upper end of right branch line 12, constitutes a L type matching network and carries out the impedance matching of antenna; In like manner, right branch line 12 constant length that also can underarm 2 are H2, and it is H3 that a bit of length is extended in the upper end of left side branch line 11, and what just the fold line form 17 that adopts of the bottom branch of the upper arm 1 of this moment will be with shown in Fig. 3 is opposite.A bit of and the corresponding position of upper arm 1 end portion fold line form that the metal rectangular 16 of described increase, both sides branch line 11 or 12 extend is a pad, be four black shade parts among the figure, 14 between the pad, 15 parts are the Surface Mount electric capacity or the inductance component of impedance matching network 6.Like this, except can also under identical antenna index request, reducing upper arm length H1, thereby the entire antenna structure length shortened by the electric capacity or adjustment of inductance center of antenna frequency and increase bandwidth of adjusting 14,15 places in the matching network.Realize the feed part 5 in the coupling part 3, identical with embodiment one.
When actual design is produced, reserve L type matching network, mate according to the antenna adjustment.Under the situation that size allows, if can realize impedance matching by length H1, fold line form 17, the length H2 of left side branch line 11, the length H3 of right branch line 12 and the space D 2 of two branch line inner side edges of adjusting upper arm 1,15 parts can be opened a way, 14 parts can mount Zero-ohm resistor or fill up with metal forming.Because 13 or 15 parts are opened a way, 14 parts are again to mount Zero-ohm resistor or fill up with metal forming, and during specific implementation PCB antenna plate, upper arm 1 can directly link to each other with inner wire 8, is printed as a whole metal pattern.
Figure 4 shows that the specific embodiment of the invention three, in this antenna structure, the length H4 of the intermediate section branch line 10 of underarm 2 is shorter, be used for welding a bit of near the feeds part of the outer conductor 9 of fixing coaxial line, bottom part at the bearing of trend of intermediate section branch line increases by one section type metal line 18, and coaxial outer conductor 9 is welded on 18, is equivalent to a pad, thereby when can fixing the feed coaxial line, reach and same effect shown in Figure 1.
The antenna assembly that the present invention adopts has following advantage:
(1) realizes low profile antenna, can more effectively utilize the monitoring unit volume inside, realized the miniaturization of monitoring unit.For example adopt common FR-4 medium sheet material, under the requirement of satisfying structural strength, the entire antenna thickness of structure can be accomplished below the 0.5mm;
(2) antenna installation flexibility is easy to the miniaturization of monitoring unit.Because aerial position can be selected flexibly according to the monitoring unit interior spatial structure, be connected on the PCB by coaxial line then, coaxial line can be selected hard cable or flexible cable for use according to the structure needs, and the length of coaxial line also can be selected according to the required distance of antenna and PCB.For example antenna is guided to the inwall of monitoring unit housing by coaxial line, the tabula rasa face by the bonding antenna medium plate of adhesive and the mode of the plastic wall device that fixes up an aerial wire;
(3) when adopting coaxial line to connect antenna and pcb board, compare, be subjected to the influence of coaxial line smaller, can provide better frequency bandwidth and omni-directional simultaneously with dipole.
Claims (13)
1. be used for the antenna assembly of monitoring unit in the supervisory control system, comprise: dielectric-slab, antenna structure, coaxial line; It is characterized in that:
The printed antenna structure is arranged on the plane of described dielectric-slab;
Described antenna structure comprises: the coupling part between rectangle upper arm, underarm of falling the chevron, two arms;
Described coupling part comprises: feed part and impedance matching network, the feed part combines with impedance matching network, by welding manner make that the inner wire of coaxial line and upper arm are electrically connected, the intermediate section branch line of outer conductor and underarm is electrically connected.
2. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 1, it is characterized in that:
The medial fascicle line length of described underarm is close with underarm both sides branch line length, the outer conductor of coaxial line is welded to the intermediate section branch line fixes coaxial line.
3. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 1 or 2, it is characterized in that:
Impedance matching network in the described coupling part, by increasing a metal rectangular, the upper part of underarm both sides branch line is respectively extended a bit of, form a π type matching network and realize the impedance matching of antenna, described metal rectangular, branch line upper part, underarm both sides are respectively extended a bit of and the corresponding position of upper arm end portion is pad, are the Surface Mount electric capacity or the inductance component of impedance matching network between the pad;
Feed part in the described coupling part, with the inner wire of coaxial line be welded on the metal rectangular, whole section welding of intermediate section branch line of outer conductor and underarm.
4. as being used for the antenna assembly of monitoring unit in claim 3 supervisory control system, it is characterized in that:
The width of described intermediate section branch line is regulated center of antenna frequency and increased bandwidth more than or equal to the external diameter of coaxial line by Surface Mount electric capacity or the inductance component of adjusting impedance matching network.
5. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 3, it is characterized in that:
Described underarm on one side the branch line upper part extend a bit of and upper arm end portion pad between open a way, that extend described underarm another side branch line upper part is a bit of, mount Surface Mount electric capacity or inductance component between metal rectangular and the upper arm end portion pad, realizes L type impedance matching network.
6. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 3, it is characterized in that:
Branch line upper part, described underarm both sides respectively extend a bit of and upper arm end portion pad between open a way, mount Zero-ohm resistor or fill up metal forming between metal rectangular and the upper arm end portion pad;
Realize impedance matching by the spacing of adjusting upper arm length, underarm both sides branch line length and both sides branch line inner side edge.
7. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 6, it is characterized in that:
Between the inner wire of described upper arm and coaxial line directly by being weldingly connected.
8. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 1 or 2, it is characterized in that:
Impedance matching network in the described coupling part, fold line form by the employing of upper arm end portion, increase a metal rectangular, underarm branch line upper part on one side extends a bit of, form L type matching network and realize the impedance matching of antenna, described metal rectangular, underarm branch line upper part are on one side extended and a bit ofly are pad with the corresponding position of upper arm end portion, are the Surface Mount electric capacity or the inductance component of impedance matching network between the pad;
Feed part in the described coupling part, with the inner wire of coaxial line be welded on the metal rectangular, whole section welding of intermediate section branch line of outer conductor and underarm.
9. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 8, it is characterized in that:
Regulate the center of antenna frequency and increase bandwidth by Surface Mount electric capacity or the inductance component of adjusting impedance matching network.
10. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 8, it is characterized in that:
Under identical antenna index request, reduce upper arm length, the entire antenna structure length is shortened.
11. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 8, it is characterized in that:
Described underarm on one side the branch line upper part extend a bit of and upper arm end portion pad between open a way, mount Zero-ohm resistor or fill up metal forming between metal rectangular and the upper arm end portion pad;
Can realize impedance matching by length, upper arm end portion fold line form, the length of underarm both sides branch line and the spacing of two branch line inner side edges of adjusting upper arm.
12. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 11, it is characterized in that:
Between the inner wire of described upper arm and coaxial line directly by being weldingly connected.
13. be used for the antenna assembly of monitoring unit in the supervisory control system as claimed in claim 1 or 2, it is characterized in that:
Underarm medial fascicle line length is shorter in the described antenna structure, is used for welding a bit of near the feed part of the outer conductor of fixing coaxial line, increases by one section type metal line at the bottom part of the bearing of trend of intermediate section branch line, is used to weld coaxial outer conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100788299A CN101071902B (en) | 2006-05-10 | 2006-05-10 | Antenna device of monitoring unit for monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100788299A CN101071902B (en) | 2006-05-10 | 2006-05-10 | Antenna device of monitoring unit for monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071902A CN101071902A (en) | 2007-11-14 |
| CN101071902B true CN101071902B (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100788299A Expired - Fee Related CN101071902B (en) | 2006-05-10 | 2006-05-10 | Antenna device of monitoring unit for monitoring system |
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| CN (1) | CN101071902B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816991A (en) * | 2020-06-03 | 2020-10-23 | 昆山睿翔讯通通信技术有限公司 | Structure and method for realizing equivalent balun |
| CN114843783B (en) * | 2022-07-06 | 2022-10-25 | 展讯通信（上海）有限公司 | Antenna module, antenna device and terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6337666B1 (en) * | 2000-09-05 | 2002-01-08 | Rangestar Wireless, Inc. | Planar sleeve dipole antenna |
| CN2694512Y (en) * | 2004-03-29 | 2005-04-20 | 连展科技（深圳）有限公司 | Flat collapsible dipole antenna |
| CN2735559Y (en) * | 2003-08-15 | 2005-10-19 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
-
2006
- 2006-05-10 CN CN2006100788299A patent/CN101071902B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6337666B1 (en) * | 2000-09-05 | 2002-01-08 | Rangestar Wireless, Inc. | Planar sleeve dipole antenna |
| CN2735559Y (en) * | 2003-08-15 | 2005-10-19 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
| CN2694512Y (en) * | 2004-03-29 | 2005-04-20 | 连展科技（深圳）有限公司 | Flat collapsible dipole antenna |
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| Publication number | Publication date |
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| CN101071902A (en) | 2007-11-14 |
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