CN108054507B - N-shaped terminal plane slot antenna with non-closed floor - Google Patents
N-shaped terminal plane slot antenna with non-closed floor Download PDFInfo
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- CN108054507B CN108054507B CN201711310233.1A CN201711310233A CN108054507B CN 108054507 B CN108054507 B CN 108054507B CN 201711310233 A CN201711310233 A CN 201711310233A CN 108054507 B CN108054507 B CN 108054507B
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- 239000002184 metal Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 abstract description 27
- 238000004891 communication Methods 0.000 abstract description 10
- 230000010354 integration Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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Abstract
The invention discloses a non-closed type valve an N-shaped terminal planar slot antenna of the floor, the coaxial feed line comprises a medium substrate, an N-shaped feed source terminal printed on the medium substrate, a forked coplanar waveguide feed line, a non-closed rectangular gap floor and an external coaxial connector. The center frequency of the antenna is determined by the semi-circular ring of the N-shaped feed source terminal and the size of the rectangle, the broadband characteristic of the antenna can be realized by adjusting the size of the inner radius of the semi-circular ring in the N-shaped feed source terminal, the impedance bandwidth of the antenna can be adjusted and expanded by the rectangular wide gap through arc transition and symmetrical increase of rectangular protrusions, impedance matching can be adjusted by adopting a fork-shaped coplanar waveguide feeder, and the overall size of the antenna can be further reduced by adopting a non-closed rectangular gap floor. The antenna has the characteristics of novel structure, convenient processing, easy integration and the like, has good radiation characteristic and gain characteristic in the working frequency band, and is suitable for an X-band wireless communication system.
Description
Technical Field
The invention relates to the technical field of wireless communication antennas, in particular to an N-shaped terminal plane slot antenna with a non-closed floor, which is suitable for an X-band wireless communication system.
Background
With the recent development of wireless communication technology, the requirements of reducing the weight of equipment, reducing the volume of the equipment and the power consumption of the equipment are met, and the requirement of light weight is met. The X-band antenna is widely applied to the fields of detection guidance, space research, satellite communication and the like, and has been focused by related researchers, but the research results in the field are relatively few. Compared with the traditional antenna, the slot antenna has the advantages of small volume, low processing precision requirement, easiness in integration with other equipment and the like, is more flexible in design, does not need to increase an impedance matching network, is convenient for mass production, and can meet the development requirement of a modern wireless communication system. The feeding mode of the slot antenna mainly comprises two modes of microstrip feeding and coplanar waveguide feeding, and the coplanar waveguide feeding mode designs the feed source and the floor on the same plane, so that the conformal and integration of the antenna are convenient. The design of the slot antenna is generally that a wider slot is formed on the floor, the slot structure is generally that an approximate ellipse or an approximate rectangle is adopted, the radiation and feed part is similar to the design of the monopole antenna, and a special geometric combination structure is adopted to adjust the impedance matching. The rectangular slot is adopted to obtain wider impedance bandwidth, the length and the width of the rectangular slot are adjusted to optimize impedance matching, for example, non-patent document 1 discloses a wide bandwidth slot conformal antenna, the rectangular slot is opened at the upper end of a medium substrate, a coplanar waveguide mode is adopted to feed the rectangular slot, the slot is excited by taking a rectangular coplanar waveguide conduction band as a feed source, the size of the rectangular slot is changed, the position of a resonance point is adjusted, the length of the rectangular conduction band is adjusted to realize impedance matching, and the antenna has the advantages of low section and easy conformal, but the overall size of the antenna is larger. A certain bandwidth can be obtained by adopting coplanar waveguide conduction band open-circuit feed, and good impedance matching can be obtained by adjusting the length of a conduction band and a gap between the conduction band and a floor, for example, patent document 1 discloses a back cavity slot antenna fed by an X-band probe, which consists of a feed probe, a back cavity, a floor and a coaxial connector, wherein a diamond slot is formed on the floor, which is equivalent to a wide gap of the gap antenna, air is filled in the rectangular back cavity, electromagnetic waves are radiated outwards by the rectangular back cavity and the diamond slot, the back cavity slot is fed by the feed probe, the working bandwidth is 8-12 GHz, the antenna has the advantages of wide bandwidth, small size, stable gain and the like, but the structural design of the antenna is complex, the increased back cavity is unfavorable for the integrated design of the antenna, the radiation direction is directional radiation, and the application range of the antenna is limited. The radiation and feed source structure of the slot antenna is similar to that of a monopole antenna, and a special geometric combination structure is adopted to realize impedance matching in a wide frequency band range, for example, patent document 2 discloses a multi-mountain-shaped dual-frequency printed slot antenna which consists of a rectangular feeder line, multi-mountain-shaped radiation units and a metal grounding plate, wherein the multi-mountain-shaped radiation units consist of a plurality of symmetrical L-shaped patches and are uniformly distributed on the left side and the right side of the rectangular feeder line. The wide slot antenna fed by the coplanar waveguide has become a hot spot of current research, the whole size, the slot structure and the feed source shape of the antenna need to be reasonably optimized, the broadband and miniaturized antenna is obtained, and the application requirements of various wireless communication systems are met.
List of citations
Non-patent literature
Non-patent document 1: han Zhenping design and characteristic study of wide bandwidth slot conformal antenna, military communication technology, 2012,33 (1): 1-6.
Patent literature
Patent document 1: chinese patent application No. 201611199269.2
Patent document 2: chinese patent grant publication number CN103682644B
Disclosure of Invention
The invention aims to provide an N-shaped terminal planar slot antenna with a non-closed floor, which has the advantages of wide frequency band, omnidirectional radiation and stable gain, is convenient to integrate in a radio frequency circuit, and meets the requirements of an X-band wireless communication system.
The technical scheme of the invention is as follows: the utility model provides an N shape terminal plane slot antenna with non-closed floor, comprises dielectric substrate (1), N shape feed terminal (2) printed on dielectric substrate (1), forked coplanar waveguide feeder (3), non-closed rectangle slot floor (4) and external coaxial joint (5), its characterized in that:
a. the N-shaped feed source terminal (2) is an N-shaped metal patch and consists of two concentric semicircular rings and two rectangles, wherein the two concentric semicircular rings are positioned at the upper end of the N-shaped feed source terminal (2), the large semicircular ring is positioned at the outer side of the small semicircular ring, and the N-shaped feed source terminal (2) is in butt joint with the lower semicircular ring conduction band of the fork-shaped coplanar waveguide feeder (3) through the small semicircular ring at the upper end;
b. the Y-shaped coplanar waveguide feeder line (3) consists of a section of rectangular conduction band with characteristic impedance of 50 omega and a lower semicircular conduction band, the lower end of the lower semicircular conduction band is connected with the upper end of the rectangular conduction band, the upper end of the lower semicircular conduction band is in butt joint with a small semicircular at the upper end of the N-shaped feed source terminal (2), the centers of the two semicircular rings are at the same position, and a circular ring structure with equal inner and outer radiuses is integrally formed;
c. the non-closed rectangular slit floor (4) is a metal patch provided with a rectangular wide slit (6), a rectangular narrow slit is formed at the upper end of the floor to form a non-closed structure floor, and the non-closed rectangular slit floor (4) is symmetrical to two sides of the forked coplanar waveguide feeder (3);
d. the rectangular wide gap (6) takes a rectangle as a base shape, four corners of the rectangle are transited through circular arcs, and two rectangular bulges are symmetrically added on two sides of the rectangular wide gap (6);
e. the coaxial connector (5) is positioned at the lower end of the dielectric substrate (1), and the coaxial connector (5) is respectively connected with the fork-shaped coplanar waveguide feeder (3) and the two lower edges of the non-closed rectangular gap floor (4).
The N-shaped feed source terminal (2) consists of two concentric semicircular rings and two rectangles, wherein the large semicircular ring is positioned at the outer side of the small semicircular ring, the inner radius of the large semicircular ring is equal to the outer radius of the small semicircular ring, so that the large semicircular ring and the small semicircular ring can be connected in a seamless manner, the two rectangles are respectively connected with the two ends of the large semicircular ring, and the width of the rectangle is equal to the annular width R of the large semicircular ring 1 -R 3 The N-shaped feed source terminal (2) is in butt joint with the lower semicircular conduction band of the forked coplanar waveguide feeder (3) through a small semicircular ring at the upper end of the N shape, and the outer radius R of the large semicircular ring 1 Length L of rectangle is 8 mm-10 mm 3 Is 6 mm-8 mm.
The characteristic impedance of the fork-shaped coplanar waveguide feeder line (3) is a rectangular conduction band length L of 50 omega 2 15mm to 17mm, width W 2 The outer radius R of the lower semicircular conduction band is 1 mm-3 mm 3 Is 4 mm-6 mm, and the inner radius R 2 3mm to 5mm.
The narrow slit width W of the rectangular upper end of the non-closed rectangular slit floor (4) 5 Is 3 mm-6 mm in length L 6 The width W of the side wall of the non-closed rectangular slit floor (4) is 2 mm-4 mm 3 The rectangular length L of the lower end of the non-closed rectangular slit floor (4) is 2 mm-3 mm 1 Is 8 mm-9 mm wide W 1 15 mm-16 mm.
The four corners of the rectangular wide gap (6) are transited to the arc radius R 4 The width W of the rectangular bulge is 3 mm-4 mm 4 Is 2 mm-3 mm in length L 5 The distance L between the bottom end of the rectangular bulge and the lower edge of the non-closed rectangular slit floor (4) is 5 mm-6 mm 4 16 mm-18 mm.
The invention has the following effects: the invention adopts a combined structure of the N-shaped feed source terminal and the non-closed rectangular slot floor with novel structure, the semicircular ring and the rectangular size of the N-shaped feed source terminal determine the central frequency of the antenna, the wide frequency band characteristic of the antenna can be realized by adjusting the size of the small semicircular ring in the N-shaped feed source terminal, the impedance bandwidth of the antenna can be adjusted and expanded by transiting the rectangular wide slot through the circular arc and symmetrically increasing the rectangular bulge, the impedance matching can be adjusted by adopting the fork-shaped coplanar waveguide feeder, the whole size of the antenna can be further reduced by adopting the non-closed rectangular slot floor, and the N-shaped feed source terminal and the non-closed rectangular slot floor are positioned on the same side of the medium substrate, so that the structure of the antenna is more compact and is easy to be conformal with other carriers. The invention has the characteristics of planar structure, low profile, small size, convenient processing, simple structure, easy integration and the like, has good radiation characteristic and gain characteristic in the working frequency band, and is suitable for an X-band wireless communication system.
Drawings
Fig. 1 is a schematic structural view of an example of the present invention.
FIG. 2 shows the measured return loss S according to embodiment 1 of the present invention 11 A curve.
FIG. 3 is a graph of the radiation pattern on the XOZ plane for example 1 of the present invention at a frequency of 8 GHz.
FIG. 4 is a graph of the radiation pattern of the XOY plane at a frequency of 8GHz for example 1 of the present invention.
FIG. 5 shows the measured return loss S according to embodiment 2 of the present invention 11 A curve.
FIG. 6 is a pattern of the radiation of example 2 of the present invention on the XOZ plane at a frequency of 9 GHz.
FIG. 7 is a pattern of the XOY plane radiation at a frequency of 9GHz for example 2 of the present invention.
FIG. 8 shows the measured return loss S according to embodiment 3 of the present invention 11 A curve.
FIG. 9 is a pattern of the radiation of example 3 of the present invention on the XOZ plane at a frequency of 10 GHz.
FIG. 10 is a graph of the radiation pattern of the XOY plane at a frequency of 10GHz for example 3 of the present invention.
Detailed Description
The specific embodiments of the invention are: as shown in fig. 1, an N-terminal planar slot antenna with a non-closed floor, the novel feed source comprises a medium substrate (1), an N-shaped feed source terminal (2) printed on the medium substrate (1), a fork-shaped coplanar waveguide feeder (3), a non-closed rectangular gap floor (4) and an external coaxial connector (5), and is characterized in that: the N-shaped feed source terminal (2) is an N-shaped metal patch and consists of two concentric semicircular rings and two rectangles, wherein the two concentric semicircular rings are positioned at the upper end of the N-shaped feed source terminal (2), the large semicircular ring is positioned at the outer side of the small semicircular ring, and the N-shaped feed source terminal (2) is in butt joint with the lower semicircular ring conduction band of the fork-shaped coplanar waveguide feeder (3) through the small semicircular ring at the upper end; the Y-shaped coplanar waveguide feeder line (3) consists of a section of rectangular conduction band with characteristic impedance of 50 omega and a lower semicircular conduction band, the lower end of the lower semicircular conduction band is connected with the upper end of the rectangular conduction band, the upper end of the lower semicircular conduction band is in butt joint with a small semicircular at the upper end of the N-shaped feed source terminal (2), the centers of the two semicircular rings are at the same position, and a circular ring structure with equal inner and outer radiuses is integrally formed; the non-closed rectangular slit floor (4) is a metal patch provided with a rectangular wide slit (6), a rectangular narrow slit is formed at the upper end of the floor to form a non-closed structure floor, and the non-closed rectangular slit floor (4) is symmetrical to two sides of the forked coplanar waveguide feeder (3); the rectangular wide gap (6) takes a rectangle as a base shape, four corners of the rectangle are transited through circular arcs, and two rectangular bulges are symmetrically added on two sides of the rectangular wide gap (6); the coaxial connector (5) is positioned at the lower end of the dielectric substrate (1), and the coaxial connector (5) is respectively connected with the fork-shaped coplanar waveguide feeder (3) and the two lower edges of the non-closed rectangular gap floor (4).
The N-shaped feed source terminal (2) consists of two concentric semicircular rings and two rectangles, wherein the large semicircular ring is positioned at the outer side of the small semicircular ring, and the inner radius of the large semicircular ring is equal to the outer radius of the small semicircular ring, so that the large semicircular ring and the small semicircular ring can be connected in a seamless mannerTwo rectangles are respectively connected with two ends of the large semicircular ring, and the width of each rectangle is equal to the ring width R of the large semicircular ring 1 -R 3 The N-shaped feed source terminal (2) is in butt joint with the lower semicircular conduction band of the forked coplanar waveguide feeder (3) through a small semicircular ring at the upper end of the N shape, and the outer radius R of the large semicircular ring 1 Length L of rectangle is 8 mm-10 mm 3 Is 6 mm-8 mm.
The characteristic impedance of the fork-shaped coplanar waveguide feeder line (3) is a rectangular conduction band length L of 50 omega 2 15mm to 17mm, width W 2 The outer radius R of the lower semicircular conduction band is 1 mm-3 mm 3 Is 4 mm-6 mm, and the inner radius R 2 3mm to 5mm.
The narrow slit width W of the rectangular upper end of the non-closed rectangular slit floor (4) 5 Is 3 mm-6 mm in length L 6 The width W of the side wall of the non-closed rectangular slit floor (4) is 2 mm-4 mm 3 The rectangular length L of the lower end of the non-closed rectangular slit floor (4) is 2 mm-3 mm 1 Is 8 mm-9 mm wide W 1 15 mm-16 mm.
The four corners of the rectangular wide gap (6) are transited to the arc radius R 4 The width W of the rectangular bulge is 3 mm-4 mm 4 Is 2 mm-3 mm in length L 5 The distance L between the bottom end of the rectangular bulge and the lower edge of the non-closed rectangular slit floor (4) is 5 mm-6 mm 4 16 mm-18 mm.
Example 1: the specific manufacturing process is as described in the embodiment mode. Selecting FR4 epoxy resin dielectric substrate with dielectric constant epsilon r The thickness h=1.6 mm, the thickness of the metal layer is 0.04mm, and the coaxial joint adopts a standard SMA joint. The length l=35 mm and the width w=35 mm of the dielectric substrate. Major semicircle external radius R of N-type feed source terminal 1 Length L of rectangle of 10mm 3 Width R of rectangle of 8mm 1 -R 3 4.5mm. Rectangular conduction band length L with characteristic impedance of 50 omega in fork-shaped coplanar waveguide feeder 2 17mm, width W 2 The gap g between the rectangular conduction band and the floor is 0.5mm, the outer radius R of the lower semicircular conduction band is 2mm 3 Is 5.5mm, inner radius R 2 4.5mm. Rectangular upper end narrow slit width W of non-closed rectangular slit floor 5 Length L of 3mm 6 3mm, notSidewall width W of closed rectangular slit floor 3 Rectangular length L of lower end of non-closed rectangular slit floor of 3mm 1 Is 8mm wide W 1 16mm. Four corner transition arc radii R of rectangular wide gap 4 Width W of rectangular protrusion of 4mm 4 Length L of 2.5mm 5 The distance L between the bottom end of the rectangular bulge and the lower edge of the non-closed rectangular slit floor is 6mm 4 Is 17mm. Testing by using vector network analyzer, actually measuring return loss S of antenna 11 As shown in FIG. 2, the operating frequency band with the return loss smaller than-10 dB is 7.1 GHz-9.1 GHz, the resonance point is slightly deviated from the center frequency by 8GHz and is positioned at 8.1GHz, and the resonance peak intensity is-41.8 dB, so that the operating requirement of the antenna can be met. The radiation patterns of the XOZ plane and the XOY plane of the antenna at the center frequency of 8GHz are tested, and the radiation characteristics of the antenna are tested, and the actual measurement is shown in fig. 3 and 4. The antenna radiation pattern is approximately stable in an '8' -shaped form on the XOZ surface, the radiation curve on the XOY surface is approximately omnidirectional, the lobe of the antenna is wider, the broadband characteristic is reflected, and the antenna has better directivity at the center frequency point.
Example 2: similar to the first embodiment, the specific manufacturing process is as described in the embodiment mode, and parameters of the dielectric substrate are kept unchanged. Other design parameters were adjusted as follows: major semicircle external radius R of N-type feed source terminal 1 Length L of rectangle of 9mm 3 Width R of rectangle of 7mm 1 -R 3 Is 4mm. Rectangular conduction band length L with characteristic impedance of 50 omega in fork-shaped coplanar waveguide feeder 2 16mm, width W 2 The gap g between the rectangular conduction band and the floor is 0.5mm, the outer radius R of the lower semicircular conduction band is 2mm 3 5mm, inner radius R 2 Is 4mm. Rectangular upper end narrow slit width W of non-closed rectangular slit floor 5 Length L of 4mm 6 Sidewall width W of non-closed rectangular slit floor of 3mm 3 Rectangular length L of lower end of non-closed rectangular slit floor of 3mm 1 Is 8.5mm wide W 1 16mm. Four corner transition arc radii R of rectangular wide gap 4 Width W of rectangular protrusion of 3.5mm 4 Length L of 2.5mm 5 5.5mm, the bottom end of the rectangular bulge is separated from the non-closed rectangular gapDistance L of underfloor edge 4 16mm. Testing by using vector network analyzer, actually measuring return loss S of antenna 11 As shown in FIG. 5, the operating frequency band with the return loss smaller than-10 dB is 7.9 GHz-9.9 GHz, the resonance point is positioned at the center frequency of 9GHz, and the resonance peak intensity is-48.4 dB, so that the operating requirement of the antenna can be met. The radiation patterns of the XOZ plane and the XOY plane of the antenna at the center frequency of 9GHz were tested, and the radiation characteristics of the antenna were checked, and the actual measurements are shown in fig. 6 and 7. The antenna radiation pattern is approximately stable in an '8' -shaped form on the XOZ surface, the radiation curve on the XOY surface is approximately omnidirectional, the lobe of the antenna is wider, the broadband characteristic is reflected, and the antenna has better directivity at the center frequency point.
Example 3: similar to the first embodiment, the specific manufacturing process is as described in the embodiment mode, and parameters of the dielectric substrate are kept unchanged. Other design parameters were adjusted as follows: major semicircle external radius R of N-type feed source terminal 1 Length L of rectangle 8.5mm 3 Width R of rectangle of 6mm 1 -R 3 Is 4mm. Rectangular conduction band length L with characteristic impedance of 50 omega in fork-shaped coplanar waveguide feeder 2 15mm, width W 2 The gap g between the rectangular conduction band and the floor is 0.5mm, the outer radius R of the lower semicircular conduction band is 2mm 3 4.5mm, inner radius R 2 Is 3.5mm. Rectangular upper end narrow slit width W of non-closed rectangular slit floor 5 5.5mm, length L 6 Sidewall width W of non-closed rectangular slit floor of 3mm 3 Rectangular length L of lower end of non-closed rectangular slit floor of 2.5mm 1 Is 9mm wide W 1 16mm. Four corner transition arc radii R of rectangular wide gap 4 Width W of rectangular protrusion of 3mm 4 Length L of 2.5mm 5 The distance L between the bottom end of the rectangular bulge and the lower edge of the non-closed rectangular slit floor is 5mm 4 Is 18mm. Testing by using vector network analyzer, actually measuring return loss S of antenna 11 As shown in FIG. 8, the operating frequency band with the return loss smaller than-10 dB is 9.2 GHz-11.3 GHz, the resonance point is slightly deviated from the center frequency by 10GHz and is positioned at 9.8GHz, and the resonance peak intensity is-38.2 dB, so that the operating requirement of the antenna can be met. For antenna in 10GHzThe radiation patterns of the XOZ plane and XOY plane at the heart frequency were tested to examine the radiation characteristics of the antenna, and the actual measurements are shown in fig. 9 and 10. The antenna radiation pattern is approximately stable in an '8' -shaped form on the XOZ surface, the radiation curve on the XOY surface is approximately omnidirectional, the lobe of the antenna is wider, the broadband characteristic is reflected, and the antenna has better directivity at the center frequency point.
Claims (4)
1. The utility model provides an N shape terminal plane slot antenna with non-closed floor, comprises dielectric substrate (1), N shape feed terminal (2) printed on dielectric substrate (1), forked coplanar waveguide feeder (3), non-closed rectangle slot floor (4) and external coaxial joint (5), its characterized in that:
the N-shaped feed source terminal (2) is an N-shaped metal patch and consists of two concentric semicircular rings and two rectangles, wherein the two concentric semicircular rings are positioned at the upper end of the N-shaped feed source terminal (2), the large semicircular ring is positioned at the outer side of the small semicircular ring, and the N-shaped feed source terminal (2) is in butt joint with the lower semicircular ring conduction band of the fork-shaped coplanar waveguide feeder (3) through the small semicircular ring at the upper end; the inner radius of the large semicircular ring is equal to the outer radius of the small semicircular ring, so that the large semicircular ring and the small semicircular ring can be connected in a seamless manner, two rectangles are respectively connected with two ends of the large semicircular ring, and the width of each rectangle is equal to the ring width R of the large semicircular ring 1 -R 3 The N-shaped feed source terminal (2) is in butt joint with the lower semicircular conduction band of the forked coplanar waveguide feeder (3) through a small semicircular at the upper end of the N shape;
the Y-shaped coplanar waveguide feeder line (3) consists of a section of rectangular conduction band with characteristic impedance of 50 omega and a lower semicircular conduction band, the lower end of the lower semicircular conduction band is connected with the upper end of the rectangular conduction band, the upper end of the lower semicircular conduction band is in butt joint with a small semicircular at the upper end of the N-shaped feed source terminal (2), the centers of the two semicircular rings are at the same position, and a circular ring structure with equal inner and outer radiuses is integrally formed;
the non-closed rectangular slit floor (4) is a metal patch provided with a rectangular wide slit (6), a rectangular narrow slit is formed at the upper end of the floor to form a non-closed structure floor, and the non-closed rectangular slit floor (4) is symmetrical to two sides of the forked coplanar waveguide feeder (3);
the rectangular wide gap (6) takes a rectangle as a base shape, four corners of the rectangle are transited through circular arcs, and two rectangular bulges are symmetrically added on two sides of the rectangular wide gap (6);
the coaxial connector (5) is positioned at the lower end of the dielectric substrate (1), and the coaxial connector (5) is respectively connected with the fork-shaped coplanar waveguide feeder (3) and the two lower edges of the non-closed rectangular gap floor (4).
2. An N-terminal planar slot antenna with non-closed floor according to claim 1, characterized in that the characteristic impedance of the forked coplanar waveguide feed (3) is a rectangular conduction band length L of 50 Ω 2 15mm to 17mm, width W 2 The outer radius R of the lower semicircular conduction band is 1 mm-3 mm 3 Is 4 mm-6 mm, and the inner radius R 2 3mm to 5mm.
3. An N-terminal planar slot antenna with non-closed floor according to claim 1, characterized in that the rectangular upper slot width W of the non-closed rectangular slot floor (4) 5 Is 3 mm-6 mm in length L 6 The width W of the side wall of the non-closed rectangular slit floor (4) is 2 mm-4 mm 3 The rectangular length L of the lower end of the non-closed rectangular slit floor (4) is 2 mm-3 mm 1 Is 8 mm-9 mm wide W 1 15 mm-16 mm.
4. An N-terminal planar slot antenna with non-closed floor according to claim 1, characterized in that said rectangular wide slot (6) has four corner transition arc radii R 4 The width W of the rectangular bulge is 3 mm-4 mm 4 Is 2 mm-3 mm in length L 5 The distance L between the bottom end of the rectangular bulge and the lower edge of the non-closed rectangular slit floor (4) is 5 mm-6 mm 4 16 mm-18 mm.
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| CN114597646B (en) * | 2022-04-11 | 2023-07-18 | 湖南迈克森伟电子科技有限公司 | Radiation unit |
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| CN207559060U (en) * | 2017-12-11 | 2018-06-29 | 吉林医药学院 | A kind of N shape end plane slot antennas with non-closed floor |
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| KR20050031625A (en) * | 2003-09-30 | 2005-04-06 | (주)에이스톤테크놀로지 | Broadband slot array antenna |
| CN1825703A (en) * | 2006-03-07 | 2006-08-30 | 上海大学 | UHF wave band miniaturized wide band wide beam slot antenna |
| CN103337701A (en) * | 2013-07-08 | 2013-10-02 | 江苏大学 | Small opened annular coplanar waveguide omnidirectional ultra-wide band antenna comprising fork radiating unit |
| CN104377428A (en) * | 2014-09-04 | 2015-02-25 | 吉林医药学院 | Broadband wide-beam rectangular monopole antenna |
| CN105161837A (en) * | 2015-09-06 | 2015-12-16 | 中国人民解放军63680部队 | Small coplanar waveguide-fed broadband printed antenna |
| CN107069204A (en) * | 2017-04-21 | 2017-08-18 | 吉林医药学院 | A kind of oval gap ultra wide planar slot antenna with hierarchic structure |
| CN207559060U (en) * | 2017-12-11 | 2018-06-29 | 吉林医药学院 | A kind of N shape end plane slot antennas with non-closed floor |
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| CN108054507A (en) | 2018-05-18 |
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