CN201623261U - Capacitance coupling type antenna device - Google Patents
Capacitance coupling type antenna device Download PDFInfo
- Publication number
- CN201623261U CN201623261U CN2010200021429U CN201020002142U CN201623261U CN 201623261 U CN201623261 U CN 201623261U CN 2010200021429 U CN2010200021429 U CN 2010200021429U CN 201020002142 U CN201020002142 U CN 201020002142U CN 201623261 U CN201623261 U CN 201623261U
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- sheet metal
- ground plane
- metal
- short circuit
- type antenna
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Abstract
The utility model provides a capacitance coupling type antenna device. A medium base plate is provided with a metal grounding face and a clear zone, wherein the clear zone is arranged at the non-angle of the edge of the medium base plate and is internally provided with a radiating element; the radiating element comprises a coupling metal pair and two short circuit parts which are arranged at two ends of the radiating element; the two short circuit parts are electrically connected with the metal grounding face; the metal grounding face is connected with the radiating element through a feeding part; and the coupling metal pair and the two short circuit parts equivalently form a coupling capacitor, an impedance matching and adjusting inducer and a resonance frequency adjusting inducter. By adjusting the size of the coupling capacitor and matching with the proper resonance frequency adjusting capacitor, the resonance frequency of the antenna can be defined; and by changing the size of the impedance matching and adjusting inducer, the impedance matching degree of the antenna can be adjusted, so that capacitance coupling type antenna device has better impedance bandwidth characteristic and better radiating efficiency.
Description
Technical field
The utility model is the miniature antenna that is applied in wireless telecommunications about a kind of, refers to a kind of any edge that is located at the circuit board of tool metal ground plane especially, and no longer limits to the capacitance coupling type antenna assembly of being located at the circuit board corner.
Background technology
Please refer to shown in Figure 7, antenna assembly is the essential document of wireless communication apparatus, generally speaking, on the circuit board of wireless communication apparatus, can form one and have larger area metal ground plane 80, wherein corner at circuit board is then additionally cooked up a headroom district 81, and antenna 82 promptly is located in the described headroom district 81.In headroom district 81, can not place other metal device, influence the Transceiver Features of antenna to avoid other element formation interference on antenna 82 and the circuit board.
Yet wireless communication apparatus is on R﹠D direction now, except require size compact, more expectation possesses greater functionality, not only the complexity of line design greatly improves thus, and the number of elements that uses also increases relatively, even the corner of circuit board also may be because of design requirement, and antenna 82 electronic component in addition must be set, so be bound to change antenna 82 script the position is set, so change may cause headroom district 81 to be forced to dwindle, electromagnetic interference problem is more obvious and reduce the radianting capacity of antenna 82, and therefore the signal transmitting and receiving effect reduces.Metal device on circuit board (as battery, LCD screen, I/O connector ... etc.) when covering antenna 82, not only can make the frequency characteristic imbalance of described antenna 82 simultaneously, also to produce and disturb to radiation characteristic, cause the antenna 82 can't normal running.
By above stated specification as can be known, existing antenna is forced to be confined to the corner of circuit board, and when actual design wireless communication apparatus product, the ornaments position of not only limiting other electronic component also might the potato masher antenna characteristic.
Summary of the invention
For this reason, main purpose of the present utility model provides a kind of capacitance coupling type antenna assembly that forms according to the circuit architecture design, be mechanism with adjustable impedance coupling, described antenna can be positioned at any edge of the circuit board that is provided with metal ground plane, and no longer be confined to corner, have bigger transmitting-receiving frequency range and high radiation efficiency concurrently.
For reaching aforementioned purpose, the utility model includes:
One medium substrate, it has upper and lower surface;
One metal ground plane is arranged at the medium substrate upper surface, and the non-corner in the edge of described metal ground plane is provided with a headroom district;
One radiation assembly, be arranged in the headroom district on the metal ground plane, coupling metal pair that described radiation assembly is made of a microwave-medium substrate, first sheet metal and second sheet metal and the two short circuit portions that lay respectively at the metal ground plane two ends are formed, wherein, metal ground plane is connected with a feeding portion with radiation assembly.
One side of described radiation assembly is the feeding portion side, an aforementioned wherein short circuit portion be electric current by the feeding portion feed-in after first sheet metal flows into the current path of metal ground plane, another short circuit portion induced current that to be electric current be coupled to second sheet metal through first sheet metal flows into the current path of metal ground plane.
The coupling metal pair that described first sheet metal and second sheet metal are constituted can equivalence be an electric capacity, the resonance frequency of described capacitance tunable integer body antenna.
The short circuit portion of aforementioned and feeding portion homonymy, promptly after first sheet metal flows into the current path of metal ground plane, described current path can equivalence be an inductance to electric current, adjusts the impedance of described inductance value tunable integer body antenna by the feeding portion feed-in.
Aforementioned another short circuit portion with respect to the feeding portion end, it is electric current is coupled to the induced current inflow metal ground plane of second sheet metal through first sheet metal current path, described current path can equivalence be an inductance, adjusts the resonance frequency of described inductance value adjustable antenna.
Described feeding portion is to be connected with described metal ground plane by a signal feed-in assembly.
Described signal feed-in assembly is coaxial transmission line, microstrip line, co-plane waveguide or sub-miniature A connector.
Thus, determine the size of described coupling capacitance via the coupling amount between control first sheet metal and second sheet metal, and cooperate suitable resonance frequency to adjust inductance adjustable antenna resonance frequency.In addition, also can adjust the size of inductance, and adjust the level of impedance match of antenna, reach good radiation efficiency by changing described impedance matching.Make antenna assembly of the present invention have preferable impedance frequency range characteristic and radiation efficiency.
Description of drawings
Fig. 1 is an equivalent circuit diagram of the present utility model;
Fig. 2 is the stereogram of the utility model first embodiment;
Fig. 3 is the partial enlarged drawing of Fig. 2;
Fig. 4 is the stereogram of the utility model capacitive coupling mechanism first embodiment;
Fig. 5 is the stereogram of the utility model capacitive coupling mechanism second embodiment;
Fig. 6 is the schematic diagram of the utility model capacitive coupling mechanism the 3rd embodiment;
Fig. 7 is the floor map that an existing antenna is located at a circuit board corner.
Description of reference numerals: 100-medium substrate; The 101-metal ground plane; 102-headroom district; 103-feed-in mouth; 110-signal feed-in assembly; 10-microwave-medium substrate; 20,20a, 20b-first sheet metal; 21,21a, 21b-first rectangular portion; 22,22a, 22b-contact site; The 23-spacer region; 30,30a, 30b-second sheet metal; 31-second rectangular portion; The 32-grounding parts; 41,42-termination electrode; 51,52,53,54-conductive pole; The 60-septal area; 70-the 3rd sheet metal; The 80-metal ground plane; 81-headroom district; The 82-antenna; The C1-coupling capacitance; C2-electric capacity; Inductance is adjusted in the L1-impedance matching; The L2-inductance; L 3-resonance frequency is adjusted inductance; The Rr-radiation resistance.
Embodiment
See also shown in Figure 1ly, be equivalent electric circuit of the present utility model, include a series connection loop 1, ally the communists shake unit 2, a radiation resistance Rr and a resonance frequency adjusted inductance L 3 in the lump.
Described parallel resonance unit 2 is to be made of an inductance L 2 and a capacitor C 2 parallel connections, and described parallel resonance unit 2 further described radiation resistance Rr in parallel and resonance frequency are adjusted the wherein end that inductance L 3 is connected to coupling capacitance C1 afterwards more jointly.
Please refer to Fig. 2, shown in Figure 3, the utility model is to include:
One microwave-medium substrate 100, be to have upper and lower surface, the surface is provided with a metal ground plane 101 thereon, the non-corner of the side of described metal ground plane 101 is to form a headroom district 102 and a feed-in mouth 103, and wherein said metal ground plane 101 and the headroom district 102 that is arranged in side can equivalence become the parallel resonance unit 2 of Fig. 1;
One radiation assembly, be to be located in the headroom district 102 of described medium substrate 100, wherein said radiation assembly is coupling metal pair and two short circuit portions to be set constitute on a microwave-medium substrate 10, radiation assembly is to be electrically connected to metal ground plane 101 and feed-in mouth 103, and its coupling metal pair and two short circuit portions can equivalence constitute coupling capacitance C1 shown in Figure 1, impedance matching adjustment inductance L 1 and resonance frequency adjustment inductance L 3; Described feed-in mouth 103 is to be connected with metal ground plane 101 by a signal feed-in assembly 110, and described signal feed-in assembly 110 can be coaxial transmission line, microstrip line, co-plane waveguide or sub-miniature A connector.
Coupling metal pair on the described microwave-medium substrate 10 can be reached in several ways, and several execution modes will make introductions all round in following explanation:
Please refer to shown in Figure 4, broadside coupled for adopting (Broadside couple) mode realizes capacitive coupling, it is the sheet metal that is formed with specific pattern on the upper and lower surface of described microwave-medium substrate 10, in microwave-medium substrate 10, be provided with the conductive structure that connects upper and lower surface metal sheet again, wherein:
One side of described microwave-medium substrate 10 is as a feeding portion side, and upper surface is formed with one first sheet metal 20, described first sheet metal 20 comprises first rectangular portion 21 that covers microwave-medium substrate 10 upper surface stage casings approximately, by first rectangular portion 21 wherein a side be to two corners of microwave-medium substrate 10 homonymies extend kept between two contact sites, 22, two contact sites 22 one be not subjected to first sheet metal 20 cover between septal area 23;
Described microwave-medium substrate 10 lower surfaces are formed with one second sheet metal 30, described second sheet metal 30 comprises second rectangular portion 31 that covers microwave-medium substrate 10 lower surface stage casings approximately, described second rectangular portion 31 with respect to contact site 22 be wherein to extend a grounding parts 32 in a corner on one side wherein towards microwave-medium substrate 10, the bearing of trend of described grounding parts 32 is that the bearing of trend with contact site 22 is opposite and be electrically connected to metal ground plane 101;
Both sides at the lower surface of described microwave-medium substrate 10 further are formed with pair of end electrode 41,42, respectively as a feed-in contact and a conductive junction point, described two corners that termination electrode 41,42 are formed in microwave-medium substrate 10 homonymies, two contact sites 22 of corresponding first sheet metal 20 of difference, wherein a termination electrode 41 be with medium substrate 100 on feed-in mouth 103 electrically connect, other end electrode 42 is to be connected with metal ground plane 101;
Aforementioned two contact sites 22 constitute electric connection with described to termination electrode the 41, the 42nd with conductive structure, for example are to connect contact site 22 and termination electrode 41,42 respectively with two conductive poles 51,52 that are embedded in the microwave-medium substrate 10 in the present embodiment; Except using conductive pole 51,52, also can form side electrode and reach the electrical connection purpose at microwave-medium substrate 10 sides.
After electric current is by 103 feed-ins of feed-in mouth,, and constitute coupling capacitance C1 with 30 equivalences of second sheet metal via conductive pole 51 first sheet metal 20 of flowing through; The two ends of described radiation assembly are to form short circuit portion respectively, wherein a short circuit portion is the current path that the feeding portion side of radiation assembly links to each other with first sheet metal 20, i.e. flow through conductive pole 52 and the metal ground plane 101 that arrives of electric current on first sheet metal 20, shown in route A, this section route can equivalence be that inductance L 1 is adjusted in described impedance matching.Another short circuit portion is the opposite side that is positioned at feeding portion, and promptly the electric current induced current that is coupled to second sheet metal 30 through first sheet metal 20 flows into the current path of metal ground plane 101, can equivalence be described resonance frequency adjustment inductance L 3.
So can determine the size of coupling capacitance C1 via the coupling amount between control first sheet metal 20 and second sheet metal 30, and cooperate suitable resonance frequency to adjust inductance L 3 and the adjustment antenna resonance frequency.In addition, also can adjust the size of inductance L 1 to change described impedance matching, and then adjust the level of impedance match of antenna, reach good radiation efficiency by the length of adjusting route A.Please refer to annex one, return the characteristic curve of loss for the utility model; Annex two～four, the horizontal polarization component H on the utility model X-Y, Y-Z and X-Z plane, the performance diagram of perpendicular polarization component (V).
Please refer to shown in the annex five, when inductance L 1 big or small adjusted in the described impedance matching of conversion, antenna impedance also with change, wherein annex five (A), (B), (C) three figure be represent described impedance matching inductance L 2 maximums respectively, take second place, the Smith chart during minimum change.
Please refer to shown in the annex six, when the described resonance frequency of conversion is adjusted inductance L 3 big or small, the resonance frequency of antenna can acquire change, and wherein annex six (A), (B), (C) three figure represent described resonance frequency inductance L 3 maximums respectively, take second place, return the loss characteristic during minimum change.
Show as Fig. 5, it is the stereogram of the utility model capacitive coupling mechanism second embodiment, it adopts edge coupling (Edge couple) mode, be that with the difference of first example described first sheet metal 20a and the second sheet metal 30a all are formed in the upper surface of microwave-medium substrate 10, but the second sheet metal 30a be and the first sheet metal 20a between be formed with a septal area 60.Microwave-medium substrate 10 lower surfaces then are to form termination electrode 41,42 respectively in four corners, and wherein a termination electrode 41 is to be connected with feeding portion 103 as a feed-in contact.
The first sheet metal 20a has kept the first rectangular portion 21a and two contact site 22a equally, has a spacer region 23 between the two contact site 22a; The second sheet metal 30a is entirely rectangle, extends to cover to the opposite side of microwave-medium substrate 10.Four corners at microwave-medium substrate 10 are to be formed with conductive structure, for example are to be formed with four conductive poles 51～54 in four corners among second embodiment, except using conductive pole, also can use side electrode to reach the electric connection purpose.
Be that equivalence constitutes coupling capacitance C1 between the described first sheet metal 20a and the second sheet metal 30a; The B of path shown in the figure is that equivalence constitutes impedance matching and adjusts inductance L 1, and described path B represents the electric current on the first sheet metal 20a also flow through conductive pole 52 and the metal ground plane 101 that arrives; Same, shown in the C of path, inductance L 3 can equivalence be adjusted for described resonance frequency in the path that electric current is coupled to the second sheet metal 30a and is connected to metal ground plane 101 via conductive pole 54.
Please refer to shown in Figure 6, be the 3rd embodiment of the utility model capacitive coupling mechanism, adopt the coupling of aforementioned edge and broadside coupled two kinds of practices simultaneously, compared to second embodiment is to increase by one the 3rd sheet metal 70, described the 3rd sheet metal 70 is to be formed at microwave-medium substrate 10 inside, described the 3rd sheet metal 70 is rectangular, be to be extended towards the direction of the first sheet metal 20b by the second sheet metal 30b, and its area is greater than the described first sheet metal 20b and the second sheet metal 30b.Conducting path D shown in the figure is that equivalence constitutes impedance matching adjustment inductance L 1; 1 of equivalent coupled capacitor C adds that by the coupled relation between the first sheet metal 20b and the second sheet metal 30b coupled relation equivalence between the first sheet metal 20b and the 3rd sheet metal 70 constitutes, shown in the E of path; And the path F among the figure is an equivalence formation resonance frequency adjustment inductance L 3.
In sum, antenna assembly of the present utility model can be adjusted parameters such as equivalent inductance, electric capacity according to demand, make antenna have impedance matching and frequency adjustment function, described antenna assembly can be positioned at any edge of the medium substrate that is provided with metal ground plane, and no longer be confined to corner, have bigger transmitting-receiving frequency range and high radiation efficiency concurrently.
More than explanation is just illustrative for the utility model; and it is nonrestrictive; those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited; can make many modifications; change, or equivalence, but all will fall in the protection range of the present utility model.
Claims (7)
1. capacitance coupling type antenna assembly is characterized in that it comprises:
One medium substrate, it has upper and lower surface;
One metal ground plane is arranged at described medium substrate upper surface, and the non-corner in the edge of described metal ground plane is provided with a headroom district;
One radiation assembly, be arranged in the headroom district on the described metal ground plane, coupling metal pair that described radiation assembly is made of a microwave-medium substrate, first sheet metal and second sheet metal and the two short circuit portions that lay respectively at described metal ground plane two ends are formed, wherein, described metal ground plane is connected with a feeding portion with described radiation assembly.
2. capacitance coupling type antenna assembly according to claim 1, it is characterized in that, one side of described radiation assembly is the feeding portion side, an aforementioned wherein short circuit portion be electric current by the feeding portion feed-in after described first sheet metal flows into the current path of described metal ground plane, another short circuit portion is the current path that induced current that electric current is coupled to described second sheet metal through described first sheet metal flows into described metal ground plane.
3. capacitance coupling type antenna assembly according to claim 1 is characterized in that, the coupling metal pair equivalence that described first sheet metal and described second sheet metal are constituted is an electric capacity, the resonance frequency of described capacitance tunable integer body antenna.
4. capacitance coupling type antenna assembly according to claim 2, it is characterized in that, be positioned at the short circuit portion of described feeding portion side, be electric current by the feeding portion feed-in after first sheet metal flows into the current path of metal ground plane, described current path equivalence is an inductance, adjusts the impedance of described inductance value tunable integer body antenna.
5. capacitance coupling type antenna assembly according to claim 2, it is characterized in that, another short circuit portion with respect to the feeding portion side, it is electric current is coupled to the induced current inflow metal ground plane of second sheet metal through first sheet metal current path, described current path equivalence is an inductance, adjusts the resonance frequency of described inductance value adjustable antenna.
6. capacitance coupling type antenna assembly according to claim 1 is characterized in that, described feeding portion is to be connected with described metal ground plane by a signal feed-in assembly.
7. capacitance coupling type antenna assembly according to claim 6 is characterized in that, described signal feed-in assembly is coaxial transmission line, microstrip line, co-plane waveguide or sub-miniature A connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200021429U CN201623261U (en) | 2010-01-14 | 2010-01-14 | Capacitance coupling type antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200021429U CN201623261U (en) | 2010-01-14 | 2010-01-14 | Capacitance coupling type antenna device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201623261U true CN201623261U (en) | 2010-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200021429U Expired - Fee Related CN201623261U (en) | 2010-01-14 | 2010-01-14 | Capacitance coupling type antenna device |
Country Status (1)
| Country | Link |
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| CN (1) | CN201623261U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078170A (en) * | 2011-02-24 | 2013-05-01 | 美国原田工业有限公司 | Antenna assembly |
| CN104661457A (en) * | 2011-01-10 | 2015-05-27 | 苹果公司 | Systems and methods for coupling sections of an electronic device |
| CN104852134A (en) * | 2015-04-22 | 2015-08-19 | 东莞劲胜精密组件股份有限公司 | Printed antenna, preparation method thereof, and mobile communication terminal device |
| CN104347935B (en) * | 2013-08-05 | 2017-04-12 | Tdk株式会社 | Antenna device and wireless communication device using same |
| CN109149138A (en) * | 2018-09-12 | 2019-01-04 | 东莞市合康电子有限公司 | A kind of diectric antenna, diectric antenna device and communication device |
-
2010
- 2010-01-14 CN CN2010200021429U patent/CN201623261U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104661457A (en) * | 2011-01-10 | 2015-05-27 | 苹果公司 | Systems and methods for coupling sections of an electronic device |
| CN104661457B (en) * | 2011-01-10 | 2017-07-28 | 苹果公司 | System and method for the part of couple electronic devices |
| CN103078170A (en) * | 2011-02-24 | 2013-05-01 | 美国原田工业有限公司 | Antenna assembly |
| CN104347935B (en) * | 2013-08-05 | 2017-04-12 | Tdk株式会社 | Antenna device and wireless communication device using same |
| CN104852134A (en) * | 2015-04-22 | 2015-08-19 | 东莞劲胜精密组件股份有限公司 | Printed antenna, preparation method thereof, and mobile communication terminal device |
| CN109149138A (en) * | 2018-09-12 | 2019-01-04 | 东莞市合康电子有限公司 | A kind of diectric antenna, diectric antenna device and communication device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20101103 Termination date: 20180114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |