CN107959111B - Dual-frequency electric small slot antenna - Google Patents
Dual-frequency electric small slot antenna Download PDFInfo
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- CN107959111B CN107959111B CN201711161770.4A CN201711161770A CN107959111B CN 107959111 B CN107959111 B CN 107959111B CN 201711161770 A CN201711161770 A CN 201711161770A CN 107959111 B CN107959111 B CN 107959111B
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- 230000005855 radiation Effects 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 230000008054 signal transmission Effects 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a dual-frequency small electric slot antenna, which comprises a single-sided copper-attached dielectric plate and a dual-frequency small electric antenna etched on the single-sided copper-attached dielectric plate; the dual-frequency small electric antenna comprises a coplanar waveguide feeder line, an impedance matching network and two slit radiation surfaces; the two slot radiation surfaces are symmetrically arranged at two sides of the coplanar waveguide feeder line and are respectively connected with the coplanar waveguide feeder line through a slot line a; the impedance matching network is connected in series in the coplanar waveguide feeder; the slit radiation surface is composed of two arc-shaped groove lines symmetrical with the extension line of the groove line a. The dual-frequency small electric antenna comprises two resonant frequencies, can completely cover all frequency bands of the WLAN, and can effectively adjust the working frequency and the performance of the antenna by adjusting the sizes of different design models.
Description
Technical Field
The invention relates to the technical field of microwave communication, in particular to a coplanar waveguide feed dual-frequency electric small WLAN slot antenna.
Background
With the rapid development of microwave technology in social work and life, wireless application devices are increasing, and antennas, which are an indispensable part of a microwave communication system, are receiving more and more attention from researchers . In recent years, as research is advanced, the rf front-end device is also being miniaturized, compacted, and multifunctional, and an electrically small antenna is becoming popular as a limit of miniaturization of the antenna. Various techniques for reducing the overall size of the antenna and maintaining good performance of the antenna, such as slotting, bending and loading techniques, have been proposed. By the 21 st century, indoor wireless networks have been increasingly popular, and WLAN (wireless local area network) small electric antennas have been increasingly emphasized, and existing WLAN antennas cannot meet the requirement of small electric power, or cannot cover all frequency bands (2.4/5.2/5.8 GHz) of WLAN at the same time. And according to the theory of Chu limit, the design of an electrically small antenna with small electricity, high efficiency, directional radiation and coverage of all frequency bands (2.4/5.2/5.8 GHz) of WLAN at the same time has extremely difficult challenges. It can be seen that its successful design has very important research significance and use value in practical engineering applications.
Disclosure of Invention
The invention aims to provide a coplanar waveguide feed-based dual-frequency WLAN small-slot antenna which has a simple structure, a low section, easy integration and low cost.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a dual-frequency electric small slot antenna comprises a single-sided copper-attached dielectric plate and a dual-frequency electric small antenna etched on the single-sided copper-attached dielectric plate; the dual-frequency small electric antenna comprises a coplanar waveguide feeder line, an impedance matching network and two slit radiation surfaces; the two slot radiation surfaces are symmetrically arranged at two sides of the coplanar waveguide feeder line and are respectively connected with the coplanar waveguide feeder line through a slot line a; the impedance matching network is connected in series in the coplanar waveguide feeder; the slit radiation surface is composed of two arc-shaped groove lines symmetrical with the extension line of the groove line a.
Preferably, the slot radiation surface comprises a first slot line, two second slot lines, two third slot lines, two fourth slot lines, two fifth slot lines, two sixth slot lines and two seventh slot lines; the middle part of the first slot line is connected with a slot line a, and two ends of the two second slot lines are respectively connected with two ends of the first slot line and one end of the third slot line to form a first U-shaped structure; two ends of the fourth slot line are respectively connected with the other end of the third slot line and one end of the fifth slot line to form a second U-shaped structure; two ends of the sixth slot line are connected with the other end of the fourth slot line and one end of the seventh slot line to form a third U-shaped structure; the end of the seventh slot line is short-circuited; the first U-shaped structure, the second U-shaped structure and the third U-shaped structure are identical in size and are connected end to form two arched groove lines.
Preferably, each corner of the first U-shaped structure, the second U-shaped structure and the third U-shaped structure is a right angle; the length of the first slot line is L1, the lengths of the second slot line, the fourth slot line and the sixth slot line are the same and L2, the distance between the two fourth slot lines is W3, the third slot line, the fifth slot line and the seventh slot line are parallel and equal in length, and the lengths thereof are 0.5 x (L01-W3).
Preferably, the impedance matching network is composed of a slot line group and two coplanar waveguides with open-ended terminals connected in parallel.
Preferably, the groove line group consists of two groove lines I and two groove lines II; one end of each of the two slot lines I is connected with the coplanar waveguide feeder, the other end of each of the two slot lines I is connected with two gaps of the first open-ended coplanar waveguide and one end of the slot line II, and the other ends of the two slot lines II are respectively connected with two signal transmission gaps of the second open-ended coplanar waveguide.
Preferably, the length of each of the groove line I and the groove line II is 0.306mm; the length of the first open-ended coplanar waveguide is 1.9mm, and the length of the open-ended section is 0.918mm; the length of the second open-ended coplanar waveguide was 1.45mm and the length of the open-section slot line was 0.306mm.
Preferably, the coplanar waveguide feeder consists of two signal transmission slots, an intermediate metal conduction band and two metal grounds; the two signal transmission gaps and the metal ground are symmetrical with respect to the middle metal conduction band, and the impedance matching network is connected in series on the middle metal conduction band.
Preferably, the width of the signal transmission gap is 0.15mm, and the width of the intermediate metal conduction band is 2.13mm.
Preferably, the plate material of the single-sided copper-attached dielectric plate is a single-layer Rogowski R4003C, the relative dielectric constant is 3.38, the thickness is 0.8mm, and the copper thickness is 0.18mm.
Compared with the prior art, the dual-frequency WLAN electric small slot antenna has the following advantages:
the small electric antenna has compact size, simple structure, low section, convenient processing, low price and easy integration with other microwave circuits. The dual-frequency small electric antenna comprises two resonant frequencies, can completely cover all frequency bands of the WLAN, and can effectively adjust the working frequency and the performance of the antenna by adjusting the sizes of different design models.
Description of the drawings:
fig. 1 is a schematic plan view of a dual-band electrically small antenna of the present invention;
FIG. 2 is a schematic diagram of the structure of the slot radiating surface of the single terminal short circuit of the present invention;
FIG. 3 is a schematic diagram of an impedance matching network loaded by a dual-frequency electrically small antenna of the present invention;
FIG. 4 is a schematic diagram of the reflection coefficient of a dual-band electrically small slot antenna of the present invention;
FIG. 5a is an E-plane and H-plane pattern at 2.4GHz (a) of the present invention;
FIG. 5b is an E-plane and H-plane pattern at 5.5GHz (b) of the present invention;
fig. 6 is a schematic diagram of an equivalent circuit of the dual-band electrically small antenna of the present invention.
The specific embodiment is as follows:
in order to further illustrate the technical means and effects of the present invention to achieve the above objects, a detailed description of embodiments of the present invention will be given below with reference to the accompanying drawings.
As shown in fig. 1, a dual-frequency small-slot electric antenna comprises a coplanar waveguide feeder 2, an impedance matching network 3, two slot radiation surfaces 1 and two identical slot lines a4; the coplanar waveguide feeder line 2 consists of two signal transmission gaps 21, an intermediate metal conduction band 22 and two metal grounds; the two signal transmission gaps 21 and the metal ground are symmetrical with respect to the middle metal conduction band 22, and the impedance matching network 3 is connected in series on the middle metal conduction band 22; the two slot radiation surfaces 1 are symmetrically arranged on two sides of the coplanar waveguide feeder line 2, the single slot radiation surface 1 is symmetrical about the extension line of the slot line a4, one end of the two slot lines a4 is connected with the signal transmission slot 21 of the coplanar waveguide feeder line 2, the other ends of the two slot lines a4 are respectively connected with the two slot radiation surfaces 1, and the impedance matching network 3 is loaded on the middle metal conduction band 22 of the coplanar waveguide feeder line 2 in series.
The dual-frequency small electric antenna is etched on a single-sided copper-attached dielectric plate consisting of metal copper 102 and a dielectric plate 101, wherein the metal copper 102 is positioned on the dielectric plate 101, and a point-shaped filling part in the figure is the metal copper 102. The single-sided copper-clad dielectric plate is a single-layer rogers R4003C with a relative dielectric constant of 3.38, a thickness of 0.8mm, and a copper thickness of 0.18mm, and the width of the intermediate metal conduction band 22 of the coplanar waveguide feeder 2 is w1=2.13 mm to satisfy 50 ohm impedance matching. The width of the signal transmission slit 21 is g1=0.15 mm.
Fig. 2 is a schematic structural view of a slot radiating surface 1 of a single terminal short circuit of the dual-frequency WLAN small antenna of the present invention, as shown in fig. 2.
The slot radiation surface 1 comprises a first slot line 11, two second slot lines 12, two third slot lines 13, two fourth slot lines 14, two fifth slot lines 15, two sixth slot lines 16 and two seventh slot lines 17; the middle part of the first slot line 11 is connected with a slot line a4, and two ends of two second slot lines 12 are respectively connected with two ends of the first slot line 11 and one end of a third slot line 13 to form a first U-shaped structure; two ends of the fourth slot line 14 are respectively connected with the other end of the third slot line 13 and one end of the fifth slot line 15 to form a second U-shaped structure; two ends of the sixth slot line 16 are connected with the other end of the fourth slot line 14 and one end of the seventh slot line 17 to form a third U-shaped structure; the end of the seventh slot line 17 is short-circuited; the first U-shaped structure, the second U-shaped structure and the third U-shaped structure are identical in size and are connected end to form two arched groove lines.
In particular, the single slot radiation surface 1 comprises two structures in the shape of a "bow" and the two structures in the shape of a "bow" are symmetrical with respect to the extension line of the slot line a4; the two bow-shaped structures of the other slot radiation surface are symmetrical about the extension line of the slot line a4, and the whole antenna comprises four bow-shaped structures.
In this embodiment, each corner of the first U-shaped structure, the second U-shaped structure, and the third U-shaped structure is a right angle; the length of the first slot line 11 is L1, the lengths of the second slot line 12, the fourth slot line 14 and the sixth slot line 16 are the same and L2, the distance between the two fourth slot lines 14 is W3, the third slot line 13, the fifth slot line 15 and the seventh slot line 17 are parallel and equal in length, and the lengths thereof are 0.5 x (L01-W3); the slot lines are hollow gaps formed on the single-sided copper-attached dielectric plate 100.
As shown in fig. 3, fig. 3 is a schematic structural diagram of an impedance matching network 3 of the dual-band electrically small antenna of the present invention. The impedance matching network 3 is loaded in series on the intermediate metal conduction band 22 of the coplanar waveguide feeder 2, as shown in fig. 1; the device specifically comprises two slot lines I31, two slot lines II 32, a first open-ended coplanar waveguide 33 and a second open-ended coplanar waveguide 34; one ends of the two slot lines I31 are connected with the coplanar waveguide feeder 2, the other ends of the two slot lines I31 are connected with two gaps of the first open-ended coplanar waveguide 33 and one end of the slot line II 32, and the other ends of the two slot lines II 32 are respectively connected with two signal transmission gaps of the second open-ended coplanar waveguide 34.
The length of the groove line I31 and the groove line II 32 is 0.306mm; the first open-ended coplanar waveguide 33 has a length of 1.9mm and an open section length of 0.918mm; the second open-ended coplanar waveguide 34 has a length of 1.45mm and an open-section slot line length of 0.306mm.
As shown in the combined drawings, the preferred dimensions of the dual-band slot antenna of the present invention are shown in table one:
table one: the preferred embodiment of the dual-band electrically small antenna of the present invention has a dimension mm
| W | 12.95 | W2 | 0.45 | L1 | 6.35 | L5 | 0.36 |
| L | 13.3 | g2 | 0.15 | L2 | 1.35 | L0 | 6 |
| W1 | 2.13 | W3 | 0.2 | L3 | 1.9 | a | 0.9 |
| g1 | 0.15 | g3 | 0.15 | L4 | 1.45 | b | 0.95 |
In this embodiment, the length L of the single-sided copper-clad dielectric sheet is preferably 13.3mm, and the width W is preferably 12.95mm. The length and width of the single-sided copper-clad dielectric plate may vary with the size of the antenna portions.
As shown in fig. 4, fig. 4 is a schematic diagram of the reflection coefficient of the dual-frequency WLAN electrically small antenna of the present invention. It can be seen that the electrically small antenna has two operating frequency bands, the center frequency of which is 2.4 and 5.5GHz, and the relative bandwidths of which are 8% and 14.5%, respectively, so that the electrically small antenna can well cover 2.4/5.2/5.8GHz and 5.5GHz of WIMAX (worldwide interoperability for microwave access). The two frequency bands of antenna operation are created by the two radiating surfaces of the short-circuited termination of the "bow" shape and the impedance matching network. The patterns of the E surface and the H surface at 2.4GHz and 5.5GHz are shown in fig. 5a and 5b, and the main polarization pattern of the E surface is 8-shaped, has certain directivity and the H surface is in an omnidirectional radiation state at 0-180 degrees.
Referring to fig. 6, fig. 6 is an equivalent circuit diagram of a dual-frequency small electric antenna proposed by the present invention, in which a series capacitor C0 is generated by an impedance matching network, C0 is obtained by connecting a capacitor C01 generated by a first open-ended coplanar waveguide 33 and a capacitor C02 generated by a second open-ended coplanar waveguide 34 in parallel, and the reactance can effectively cancel an increase in the imaginary part of the input impedance of the antenna due to a sharp size reduction, thereby improving the overall performance of the antenna, including impedance matching of the antenna and a feeder line, reducing reflection, widening frequency band, improving efficiency and gain, etc.; in the figureIs the input impedance of the antenna, Z L Is a matching impedance or other microwave circuit connected with the feeder line, and the resistance value is 50 ohms.
The dual-frequency small electric antenna has compact design structure, convenient processing, low price, low section and easy integration of other microwave circuits, realizes the small electric antenna capable of covering all frequency bands of the WLAN by adopting a loading technology, has good radiation effect and is expected to be popularized and used.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (4)
1. The utility model provides a little gap antenna of dual-frenquency electricity which characterized in that: the dual-frequency small antenna comprises a single-sided copper-attached dielectric plate and a dual-frequency small antenna etched on the single-sided copper-attached dielectric plate;
the dual-frequency small electric antenna comprises a coplanar waveguide feeder (2), an impedance matching network (3) and two slit radiation surfaces (1);
the two slit radiation surfaces (1) are symmetrically arranged at two sides of the coplanar waveguide feeder line (2) and are respectively connected with the coplanar waveguide feeder line (2) through a slot line a (4);
the impedance matching network (3) is connected in series in the coplanar waveguide feeder (2);
the slit radiation surface (1) is composed of two arc-shaped groove lines symmetrical with the extension line of the groove line a (4);
the slit radiation surface (1) comprises a first slot line (11), two second slot lines (12), two third slot lines (13), two fourth slot lines (14), two fifth slot lines (15), two sixth slot lines (16) and two seventh slot lines (17);
the middle part of the first slot line (11) is connected with the slot line a (4), and two ends of the two second slot lines (12) are respectively connected with two ends of the first slot line (11) and one end of the third slot line (13) to form a first U-shaped structure;
two ends of the fourth slot line (14) are respectively connected with the other end of the third slot line (13) and one end of the fifth slot line (15) to form a second U-shaped structure;
two ends of the sixth slot line (16) are connected with the other end of the fourth slot line (14) and one end of the seventh slot line (17) to form a third U-shaped structure;
the end of the seventh slot line (17) is short-circuited;
the first U-shaped structure, the second U-shaped structure and the third U-shaped structure have the same size and are connected end to form two arched groove lines;
each corner of the first U-shaped structure, the second U-shaped structure and the third U-shaped structure is a right angle;
the lengths of the first groove line (11) are L1, the lengths of the second groove line (12), the fourth groove line (14) and the sixth groove line (16) are L2, the distance between the two fourth groove lines (14) is W3, the third groove line (13), the fifth groove line (15) and the seventh groove line (17) are parallel and equal in length, and the lengths thereof are 0.5 x (L01-W3);
the impedance matching network (3) consists of a slot line group and two coplanar waveguides with open-ended terminals which are mutually connected in parallel;
the groove line group consists of two groove lines I (31) and two groove lines II (32);
one end of each slot line I (31) is connected with the coplanar waveguide feeder (2), the other end of each slot line I is connected with two gaps of the first open-ended coplanar waveguide (33) and one end of each slot line II (32), and the other ends of the two slot lines II (32) are respectively connected with two signal transmission gaps of the second open-ended coplanar waveguide (34);
the coplanar waveguide feeder line (2) consists of two signal transmission gaps (21), an intermediate metal conduction band (22) and two metal grounds;
the two signal transmission gaps (21) and the metal ground are symmetrical with respect to the middle metal conduction band (22), and the impedance matching network (3) is connected in series on the middle metal conduction band (22).
2. A dual-band electrically small slot antenna as in claim 1, wherein: the lengths of the groove line I (31) and the groove line II (32) are 0.306mm;
the first open-ended coplanar waveguide (33) has a length of 1.9mm and an open section length of 0.918mm;
the second open-ended coplanar waveguide (34) has a length of 1.45mm and an open-section slot line length of 0.306mm.
3. A dual-band electrically small slot antenna as in claim 1, wherein: the width of the signal transmission gap (21) is 0.15mm, and the width of the intermediate metal conduction band (22) is 2.13mm.
4. A dual-band electrically small slot antenna as in claim 1, wherein: the single-sided copper-attached dielectric plate is a single-layer Rojies R4003C, the relative dielectric constant is 3.38, the thickness is 0.8mm, and the copper thickness is 0.18mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711161770.4A CN107959111B (en) | 2017-11-20 | 2017-11-20 | Dual-frequency electric small slot antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711161770.4A CN107959111B (en) | 2017-11-20 | 2017-11-20 | Dual-frequency electric small slot antenna |
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| CN107959111A CN107959111A (en) | 2018-04-24 |
| CN107959111B true CN107959111B (en) | 2024-03-08 |
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| CN201711161770.4A Active CN107959111B (en) | 2017-11-20 | 2017-11-20 | Dual-frequency electric small slot antenna |
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| CN110676554B (en) * | 2019-08-02 | 2021-04-30 | 杭州法动科技有限公司 | Low-profile ultra-wideband indoor communication plane structure antenna |
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