CN114122655A - Slot waveguide and waveguide slot array antenna - Google Patents
Slot waveguide and waveguide slot array antenna Download PDFInfo
- Publication number
- CN114122655A CN114122655A CN202210064969.XA CN202210064969A CN114122655A CN 114122655 A CN114122655 A CN 114122655A CN 202210064969 A CN202210064969 A CN 202210064969A CN 114122655 A CN114122655 A CN 114122655A
- Authority
- CN
- China
- Prior art keywords
- waveguide
- slot
- slit
- vertical
- slanted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/10—Wire waveguides, i.e. with a single solid longitudinal conductor
-
- 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
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/22—Longitudinal slot in boundary wall of waveguide or transmission line
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
Landscapes
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a slot waveguide and a waveguide slot array antenna, wherein the slot waveguide comprises: the cross section is rectangular waveguide, a plurality of waveguide slots are arranged on the rectangular waveguide, each waveguide slot comprises a vertical slot arranged on the narrow side of the waveguide of the rectangular waveguide, and a first inclined slot and a second inclined slot which are respectively arranged on the wide side of the waveguide of the rectangular waveguide, the first inclined slot is connected with one end of the vertical slot, and the second inclined slot is connected with the other end of the vertical slot. The invention plays a role of cutting current by loading the inclined slits on the wide sides of the two ends of the vertical slit, and finally plays a role of exciting the narrow-side vertical slit to form radiation. The antenna has simple structure, easy processing, direct processing on the waveguide section bar, simple processing technology, greatly shortened production period, reduced manufacturing cost and improved product yield.
Description
Technical Field
The invention relates to the technical field of waveguide slot array antennas, in particular to a slot waveguide and a waveguide slot array antenna.
Background
The waveguide slot array antenna has the advantages of high efficiency, compact structure, easiness in processing, easiness in realizing high gain, low sidelobe and the like, and is widely applied to the field of military and civil radars.
The rectangular waveguide slot array antenna can be generally divided into a wide-edge slot array and a narrow-edge slot array according to the positions of slots. According to the inclination angle of the narrow-edge gap, the narrow-edge gap array can be divided into two types: the narrow-side inclined slot array and the narrow-side vertical slot array.
In the conventional slot antenna, if the radiation surface of the antenna is a waveguide broadside, the radiation is formed by cutting surface current on the waveguide broadside through a slot; if the antenna radiation surface is a waveguide narrow side, the surface current on the waveguide narrow side needs to be cut by a gap to form radiation. Taking a slot antenna with a narrow side of a rectangular waveguide as an example, the direction of the surface current on the narrow side of the rectangular waveguide is perpendicular to the wide side of the waveguide. In order to form radiation, the prior art proposes narrow-sided oblique slot antennas and narrow-sided vertical slot antennas. The narrow-side inclined slot antenna is characterized in that a slot on a narrow side is designed to be an inclined slot, so that an included angle exists between the axial direction of the slot and the current direction, and the slot is excited to form radiation, namely the narrow-side inclined slot antenna. The existing narrow-edge inclined slot array antenna has mature design technology and is easy to realize high gain and low side lobe; the waveguide section bar can be directly processed on the waveguide section bar, has simple process flow, short processing period and low manufacturing cost, and is widely used in the field of antennas.
However, in the conventional narrow-side tilted slot antenna, the narrow-side tilted slot array requires a certain tilt angle of the slot, so that the cross polarization performance is poor, and particularly, when a large-angle beam scanning is performed, the cross polarization performance is rapidly deteriorated. The prior art thus proposes narrow-sided vertical slot array antennas.
The narrow-side vertical slot array antenna changes the current direction on the wall of a narrow side by introducing a tuning block into a waveguide cavity, and the radiation slot is designed to be a non-inclined slot perpendicular to a wide side, so that an included angle is formed between the current direction and the non-inclined slot by modulating the current direction to excite the slot, namely the waveguide non-inclined slot antenna. The narrow-side inclined slot antenna and the narrow-side vertical slot antenna have the common characteristic that the current direction on the wall of the narrow side and the axial direction of the slot on the narrow side form an included angle through design to form radiation.
Therefore, the conventional narrow-edge vertical slot array antenna is realized by opening a vertical slot on the narrow edge of the waveguide and then adding tuning blocks at two ends of the slot. This type of antenna has good cross-polarization performance because its slot on the narrow side has no tilt. On the other hand, the tuning block needs to be added in the waveguide, so that the waveguide profile cannot be machined, and the waveguide profile can be machined only by various processes such as milling, welding and the like. Therefore, the antenna has the disadvantages of high requirement on processing precision, long period, high manufacturing cost and the like, and is not widely popularized and used in the antenna field.
In order to meet the system requirements of the current phased array radar, a rectangular waveguide narrow-edge slot array antenna which is excellent in cross polarization performance, controllable in cost and easy to process is urgently needed.
Disclosure of Invention
Therefore, it is necessary to provide a slot waveguide and a waveguide slot array antenna, aiming at the technical problem that the electrical performance and the processing cycle cost of the rectangular waveguide narrow-edge slot array antenna in the prior art cannot be considered at the same time.
The present invention provides a slot waveguide comprising: the rectangular waveguide with the rectangular cross section is provided with a plurality of waveguide slots, each waveguide slot comprises a vertical slot arranged on the narrow waveguide edge of the rectangular waveguide, and a first inclined slot and a second inclined slot which are respectively arranged on the wide waveguide edge of the rectangular waveguide, the first inclined seam is connected with one end of the vertical seam, the second inclined seam is connected with the other end of the vertical seam, the vertical slot is vertical to the plane of the wide side of the waveguide, the straight line passing through the vertical slot and vertical to the plane of the narrow side of the waveguide is the vertical line of the waveguide slot, on a broadside parallel plane parallel to the plane of the broadside of the waveguide and passing through the perpendicular of the waveguide slot, the first projection of the first inclined seam and the perpendicular line of the waveguide seam have a first inclination angle, and the second projection of the second inclined seam and the perpendicular line of the waveguide seam have a second inclination angle.
Furthermore, on the broadside parallel plane, a first projection of a first inclined slit and a second projection of a second inclined slit of the same waveguide slit are respectively positioned on two sides of the waveguide slit perpendicular line of the vertical slit passing through the same waveguide slit.
Further, the lengths of the first and second inclined slits are inversely related to the length of the vertical slit.
Further, the length of the first inclined slit and the length of the second inclined slit are inclined slit lengths, and the inclined slit length l = (λ/2-w)/2+ epsilon, where w is the length of the vertical slit, λ = c/f, c is the speed of light, f is the operating frequency of the slit waveguide, and epsilon is a tolerance value greater than or equal to 0.
Further, the inclination directions of the first inclined slits provided on one waveguide broad side are alternately changed, and the inclination directions of the second inclined slits provided on the other waveguide broad side are alternately changed.
Further, the first inclination angle is greater than 0 ° and less than 15 °, and the second inclination angle is greater than 0 ° and less than 15 °.
Further, the first inclination angle is equal to the second inclination angle.
Further, on the broadside parallel plane, an included angle between a first projection of the first inclined slit and a second projection of the second inclined slit of the same waveguide slit is greater than 0 ° and smaller than 30 °.
Still further, the waveguide narrow side is a radiating surface, and the waveguide wide side is a non-radiating surface.
The invention provides a waveguide slot array antenna which comprises a slot waveguide, a waveguide coaxial converter and a waveguide load, wherein one end of the slot waveguide is connected with the waveguide coaxial converter, and the other end of the slot waveguide is connected with the waveguide load.
The invention plays a role of cutting current by loading the inclined slits on the wide sides of the two ends of the vertical slit, and finally plays a role of exciting the narrow-side vertical slit to form radiation. The antenna has simple structure, easy processing, direct processing on the waveguide section bar, simple processing technology, greatly shortened production period, reduced manufacturing cost and improved product yield. The invention is an antenna form which can completely replace the traditional rectangular waveguide narrow-side slot antenna and has the characteristic of being widely applied in the field of antennas.
Drawings
Fig. 1 is a schematic structural diagram of a waveguide slot array antenna according to the present invention;
FIG. 2 is an enlarged schematic view of a waveguide slot in an embodiment of the present invention;
FIG. 3 is a schematic diagram of the inclination angle and the included angle of the inclined slit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the actual measurement result of the antenna azimuth plane directional pattern according to the preferred embodiment of the present invention.
Description of the marks
1-a slot waveguide; 11-a rectangular waveguide; 12-a waveguide slot; 111-waveguide narrow side; 112-waveguide broadside; 121-vertical seam; 122-a first oblique slot; 1221 — first projection; 123-a second inclined slit; 1231 — second projection; 124-waveguide slot vertical; 125-broadside parallel plane; 2-waveguide coaxial converters; 3-waveguide loading.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example one
As shown in fig. 1 to 3, a slot waveguide 1 of the present invention includes: a rectangular waveguide 11 with a rectangular cross section, the rectangular waveguide 11 being provided with a plurality of waveguide slots 12, each waveguide slot 12 including a vertical slot 121 disposed on a waveguide narrow side 111 of the rectangular waveguide 11, and a first inclined slot 122 and a second inclined slot 123 disposed on a waveguide wide side 112 of the rectangular waveguide 11, respectively, the first inclined slot 122 being connected to one end of the vertical slot 121, the second inclined slot 123 being connected to the other end of the vertical slot 121, the vertical slot 121 being perpendicular to a plane of the waveguide wide side 112, a straight line passing through the vertical slot 121 and perpendicular to the plane of the waveguide narrow side 111 being a waveguide slot perpendicular line 124, a first projection 1221 of the first inclined slot 122 having a first inclination angle with the waveguide slot perpendicular line 124 on a wide side parallel plane 125 parallel to the plane of the waveguide wide side 112 and passing through the waveguide slot perpendicular line 124, a second projection 1231 of the second slanted slit 123 has a second angle of inclination with respect to the waveguide slit perpendicular 124.
Specifically, the antenna of the present invention is a narrow-side slot antenna, and the radiation surface thereof is a waveguide narrow side 111. The antenna adopts a rectangular waveguide, so that the current direction on the narrow side wall of the rectangular waveguide is perpendicular to the waveguide wide side 112, and the width of the waveguide narrow side 111 is smaller than that of the waveguide wide side 112. Taking the direction shown in fig. 1 as an example, the waveguide narrow side 111 is the top surface of the rectangular waveguide 11, and the waveguide wide side 112 is the two side surfaces of the rectangular waveguide 11. Meanwhile, the narrow-edge non-inclined slit is adopted, namely the axial direction of the radiation slit is parallel to the current direction, and no included angle exists. As shown in fig. 1 and 2, the vertical slit 121 serves as a radiation slit. According to the traditional design concept, the radiation slits are parallel to the current direction, so that the current cannot be effectively cut, and radiation cannot be formed. The innovation point of the antenna is that a first inclined slit 122 and a second inclined slit 123 are introduced into the two ends of the vertical slit 121 by designing on the waveguide wide side 112 of the non-radiation surface. As shown in fig. 2, a vertical slit 121 is provided on the waveguide narrow side 111, a first inclined slit 122 is provided on one waveguide wide side 112, a second inclined slit 123 is provided on the opposite side of the waveguide wide side 112, and the first inclined slit 122, the vertical slit 121, and the second inclined slit 123 are connected in this order to constitute the waveguide slit 12. The first inclined slit 122 and the second inclined slit 123 cut the surface current on the non-radiation surface, and then excite the vertical slit 121 on the narrow side 111 of the waveguide to radiate, and the excitation principle is different from all the existing slot antennas. Meanwhile, according to the existing design concept, the cutting current is generated on the wide side of the waveguide, so that the two wide sides of the waveguide are both radiation surfaces, the radiation direction of the antenna is dispersed, and the energy is not concentrated. In the invention, the energy radiated from both sides of the waveguide wide side 112 is cancelled by the mirror design, and the energy radiation is concentrated on the waveguide narrow side 111, i.e. the radiation surface is still the waveguide narrow side 111. In addition, since the first inclined slit 122 and the second inclined slit 123 are designed on the non-radiation surface, the inclination angles of the first inclined slit 122 and the second inclined slit 123 do not contribute to the cross polarization of the antenna, so that the antenna cross polarization performance is superior.
As shown in fig. 3, a straight line passing through the vertical slit 121 and perpendicular to the plane of the waveguide narrow side 111 is a waveguide slit perpendicular line 124, and a plane parallel to the plane of the waveguide wide side 112 and passing through the waveguide slit perpendicular line 124 is a wide side parallel plane 125. On the broadside parallel plane 125, the angle between the first projection 1221 of the first slanted slit 122 and the waveguide slit perpendicular 124 is the first tilt angle of the first slanted slit 122. On the broadside parallel plane 125, the angle between the second projection 1231 of the second slanted slit 123 and the waveguide slit perpendicular 124 is the second tilt angle of the second slanted slit 123.
The invention plays a role of cutting current by loading the inclined slits on the wide sides of the two ends of the vertical slit, and finally plays a role of exciting the narrow-side vertical slit to form radiation. The antenna has simple structure, easy processing, direct processing on the waveguide section bar, simple processing technology, greatly shortened production period, reduced manufacturing cost and improved product yield. The invention is an antenna form which can completely replace the traditional rectangular waveguide narrow-side slot antenna and has the characteristic of being widely applied in the field of antennas.
Example two
As shown in fig. 1 to 3, a slot waveguide 1 according to an embodiment of the present invention includes: a rectangular waveguide 11 with a rectangular cross section, the waveguide narrow side 111 of the rectangular waveguide 11 is a radiation surface, the waveguide wide side 112 of the rectangular waveguide 11 is a non-radiation surface, the rectangular waveguide 11 is provided with a plurality of waveguide slots 12, each waveguide slot 12 includes a vertical slot 121 disposed on the waveguide narrow side 111 of the rectangular waveguide 11, and a first inclined slot 122 and a second inclined slot 123 respectively disposed on the waveguide wide side 112 of the rectangular waveguide 11, the first inclined slot 122 is connected with one end of the vertical slot 121, the second inclined slot 123 is connected with the other end of the vertical slot 121, the vertical slot 121 is perpendicular to the plane of the waveguide wide side 112, a straight line passing through the vertical slot 121 and perpendicular to the plane of the waveguide narrow side 111 is a waveguide slot perpendicular line 124, on a wide side parallel plane 125 parallel to the plane of the waveguide wide side 112 and passing through the waveguide slot perpendicular line 124, a first projection 1221 of the first slanted slit 122 has a first angle of inclination with respect to the waveguide slit normal 124, and a second projection 1231 of the second slanted slit 123 has a second angle of inclination with respect to the waveguide slit normal 124;
on the broadside parallel plane 125, a first projection 1221 of a first slanted slit 122 and a second projection 1231 of a second slanted slit 123 of the same waveguide slit 12 are respectively located on both sides of the waveguide slit perpendicular 124 passing through the vertical slit 121 of the same waveguide slit 12;
the lengths of the first inclined slit 122 and the second inclined slit 123 are inversely related to the length of the vertical slit 121, the lengths of the first inclined slit 122 and the second inclined slit 123 are inclined slit lengths, and the inclined slit length l = (λ/2-w)/2+ epsilon, wherein w is the length of the vertical slit 121, λ = c/f, c is the speed of light, f is the operating frequency of the slit waveguide 1, and epsilon is a tolerance value greater than or equal to 0;
the first inclined slits 122 provided in one waveguide broad side 112 are alternately changed in the inclination direction, and the second inclined slits 123 provided in the other waveguide broad side 112 are alternately changed in the inclination direction;
preferably, the first inclination angle α 1 is greater than 0 ° and less than 15 °, the second inclination angle α 2 is greater than 0 ° and less than 15 °;
preferably, the first inclination angle is equal to the second inclination angle;
preferably, on the broadside parallel plane 125, an angle α 3 between a first projection 1221 of the first slanted slit 122 and a second projection 1231 of the second slanted slit 123 of the same waveguide slit 12 is greater than 0 ° and smaller than 30 °.
Specifically, the first inclined slit 122 and the second inclined slit 123 of the present embodiment are located on both sides of the waveguide slit perpendicular line 124, respectively. More specifically, as shown in fig. 3, on the broadside parallel surface 125, a first projection 1221 of the first slanted slit 122 and a second projection 1231 of the second slanted slit 123 of the same waveguide slit 12 are located on both sides of the waveguide slit perpendicular 124 passing through the vertical slit 121 of the same waveguide slit 12, respectively. Therefore, the first inclined slit 122 and the second inclined slit 123 are inclined in opposite directions, so that the energy radiated from both sides of the waveguide broadside 112 are cancelled out, and the antenna cross-polarization performance is improved.
The lengths of the first and second inclined slits 122 and 123 are inversely related to the length of the vertical slit 121. That is, the longer the vertical slit 121 is, the shorter the lengths of the first inclined slit 122 and the second inclined slit 123 need to be designed, and conversely, the shorter the vertical slit 121 is, the longer the lengths of the first inclined slit 122 and the second inclined slit 123 need to be designed.
Specifically, the length of the first inclined slit 122 is equal to the length of the second inclined slit 123, and is l = (λ/2-w)/2+ epsilon, where w is the length of the vertical slit 121, λ = c/f, c is the speed of light, f is the operating frequency of the slot waveguide 1, and epsilon is a tolerance value equal to or greater than 0.
The inclination directions of the plurality of first inclined slits 122 on the same waveguide broad side 112 are alternately changed, and the inclination directions of the second inclined slits 123 on the other waveguide broad side 112 are alternately changed. Therefore, the inclination directions of the adjacent first inclined slits 122 or second inclined slits 123 are opposite, and equal phase excitation is realized.
Preferably, the first inclination angle and the second inclination angle are the same and are both 0-15 degrees. The included angle between the first inclined slit 122 and the second inclined slit 123 is 0-30 degrees. The included angle between the first inclined slit 122 and the second inclined slit 123 is: the first projection 1221 of the first slanted slit 122 of the same waveguide slit 12 forms an angle with the second projection 1231 of the second slanted slit 123 on the broadside parallel surface 125.
Fig. 4 is a schematic diagram showing the actual measurement result of the antenna azimuth plane directional pattern according to the preferred embodiment of the present invention, which includes a main polarization azimuth plane direction curve 41 and a cross polarization azimuth plane direction curve 42.
The cross polarization of the single measured slot waveguide of the embodiment is lower than-42 dB, and far exceeds the performance of the existing waveguide narrow-edge inclined slot antenna.
The embodiment plays a role of cutting current by loading the inclined slits on the wide sides of the two ends of the vertical slit, and finally plays a role of exciting the narrow-side vertical slit to form radiation. Meanwhile, because the two inclined slits are designed on the non-radiation surface, the antenna has the advantages that the inclination angle of the slits does not contribute to the cross polarization of the antenna, and the radiation is formed by exciting the vertical slits, which is different from the traditional inclined slits, the vertical slits have no inclination angle, and no cross polarization component exists, so that the cross polarization performance of the antenna is greatly improved. The slot waveguide has the advantages of simple structure, easy processing, capability of directly processing the waveguide section bar without processes of multiple milling, welding and the like of the traditional waveguide narrow-edge non-slot array, simple processing process, greatly shortened production period, reduced manufacturing cost and improved yield of products. Finally, the slot waveguide of the embodiment has the excellent performances of easy processing of the conventional waveguide narrow-side inclined slot waveguide and low cross polarization of the conventional waveguide narrow-side vertical slot waveguide, can completely replace the conventional rectangular waveguide narrow-side slot waveguide, and has the characteristics of being widely applied in the field of antennas.
EXAMPLE III
Fig. 1 is a schematic structural diagram of a waveguide slot array antenna of the present invention, which includes the slot waveguide 1, the waveguide coaxial converter 2, and the waveguide load 3, where one end of the slot waveguide 1 is connected to the waveguide coaxial converter 2, and the other end is connected to the waveguide load 3.
The slot waveguide 1 is a slot waveguide according to an embodiment of the present invention. One end of which is connected to a horizontally polarized waveguide coaxial transformer 2 and the other end is connected to a waveguide load 3. The waveguide coaxial converter 2 is a rectangular waveguide coaxial converter, and the waveguide load 3 is a rectangular waveguide load.
Unlike the conventional narrow-side inclined waveguide, the slot on the waveguide narrow side 111 of the rectangular waveguide 11 of the slot waveguide 1 of the present invention is a vertical slot 121 perpendicular to the waveguide axis direction, and has no inclination angle. Unlike the conventional narrow-side non-inclined slot waveguide, the rectangular waveguide 11 of the slot waveguide 1 of the present invention does not require an additional tuning block. Finally, unlike the existing narrow-edge slot waveguides, the two ends of the vertical slot 121 of the rectangular waveguide 11 of the slot waveguide 1 of the present invention are connected to the first inclined slot 122 and the second inclined slot 123 that are opened on the waveguide wide edges 112 on the two sides, and the first inclined slot 122, the vertical slot 121, and the second inclined slot 123 are sequentially connected to form a complete waveguide slot 12.
When the antenna works, a radio frequency signal is input from an inlet of the waveguide coaxial converter 2, the radio frequency signal enters the slot waveguide 1 after passing through the waveguide coaxial converter 2, and then the radio frequency signal is radiated to a space through the waveguide slot 12 to form linearly polarized electromagnetic waves, and redundant energy in the slot waveguide 1 is absorbed by the waveguide load 3.
The invention plays a role of cutting current by loading the inclined slits on the wide sides of the two ends of the vertical slit, and finally plays a role of exciting the narrow-side vertical slit to form radiation. Meanwhile, because the two inclined slits are designed on the non-radiation surface, the antenna has the advantages that the inclination angle of the slits does not contribute to the cross polarization of the antenna, and the radiation is formed by exciting the vertical slits, which is different from the traditional inclined slits, the vertical slits have no inclination angle, and no cross polarization component exists, so that the cross polarization performance of the antenna is greatly improved. The antenna has simple structure and easy processing, can be directly processed on the waveguide section without processes of multiple milling, welding and the like required by the traditional waveguide narrow-edge non-slot array, has simple processing process, greatly shortens the production period, reduces the manufacturing cost, and simultaneously improves the yield of products. Finally, the antenna has the excellent performances of easy processing of the traditional waveguide narrow-side inclined slot antenna and low cross polarization of the traditional waveguide narrow-side vertical slot antenna, is an antenna form capable of completely replacing the traditional rectangular waveguide narrow-side slot antenna, and has the characteristic of being widely applied in the field of antennas.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A slot waveguide (1), comprising: a rectangular waveguide (11) with a rectangular cross section, wherein a plurality of waveguide slots (12) are arranged on the rectangular waveguide (11), each waveguide slot (12) comprises a vertical slot (121) arranged on a waveguide narrow side (111) of the rectangular waveguide (11), and a first inclined slot (122) and a second inclined slot (123) respectively arranged on a waveguide wide side (112) of the rectangular waveguide (11), the first inclined slot (122) is connected with one end of the vertical slot (121), the second inclined slot (123) is connected with the other end of the vertical slot (121), the vertical slot (121) is perpendicular to a plane where the waveguide wide side (112) is located, a straight line passing through the vertical slot (121) and perpendicular to the plane where the waveguide narrow side (111) is located is a waveguide slot vertical line (124), and on a wide-side parallel plane (125) parallel to the plane where the waveguide wide side (112) is located and passing through the waveguide slot vertical line (124), a first projection (1221) of the first slanted slit (122) has a first angle of inclination to the waveguide slit perpendicular (124), and a second projection (1231) of the second slanted slit (123) has a second angle of inclination to the waveguide slit perpendicular (124).
2. A slot waveguide (1) according to claim 1, characterized in that on the broadside parallel plane (125) a first projection (1221) of a first slanted slot (122) and a second projection (1231) of a second slanted slot (123) of the same waveguide slot (12) are located on both sides of the waveguide slot perpendicular (124) through the vertical slot (121) of the same waveguide slot (12), respectively.
3. A slot waveguide (1) according to claim 1, characterized in that the lengths of the first and second slanted slits (122, 123) are inversely related to the length of the vertical slit (121).
4. A slot waveguide (1) according to claim 3, wherein the length of the first slanted slot (122) and the length of the second slanted slot (123) are slanted slot lengths, wherein the slanted slot lengths l = (λ/2-w)/2+ e, where w is the length of the vertical slot (121), λ = c/f, c is the speed of light, f is the operating frequency of the slot waveguide (1), and e is a tolerance value greater than or equal to 0.
5. A slot waveguide (1) according to claim 1, characterized in that the direction of inclination of the first slanted slit (122) arranged at one waveguide broadside (112) alternates, and the direction of inclination of the second slanted slit (123) arranged at the other waveguide broadside (112) alternates.
6. A slot waveguide (1) according to claim 1, characterized in that said first tilt angle is larger than 0 ° and smaller than 15 °, and said second tilt angle is larger than 0 ° and smaller than 15 °.
7. A slot waveguide (1) according to claim 1, characterized in that said first and second tilt angles are equal.
8. A slot waveguide (1) according to claim 1, characterized in that on the broadside parallel surface (125) the first projection (1221) of the first slanted slit (122) of the same waveguide slot (12) forms an angle larger than 0 ° and smaller than 30 ° with the second projection (1231) of the second slanted slit (123).
9. A slot waveguide (1) according to any of claims 1 to 8, characterized in that the waveguide narrow side (111) is a radiating plane and the waveguide wide side (112) is a non-radiating plane.
10. A waveguide slot array antenna, comprising a slot waveguide (1) according to any one of claims 1 to 9, a waveguide coaxial converter (2) and a waveguide load (3), wherein one end of the slot waveguide (1) is connected with the waveguide coaxial converter (2), and the other end is connected with the waveguide load (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210064969.XA CN114122655B (en) | 2022-01-20 | 2022-01-20 | Slot waveguide and waveguide slot array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210064969.XA CN114122655B (en) | 2022-01-20 | 2022-01-20 | Slot waveguide and waveguide slot array antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114122655A true CN114122655A (en) | 2022-03-01 |
| CN114122655B CN114122655B (en) | 2022-07-05 |
Family
ID=80360912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210064969.XA Active CN114122655B (en) | 2022-01-20 | 2022-01-20 | Slot waveguide and waveguide slot array antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114122655B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1016783B (en) * | 1955-06-30 | 1957-10-03 | Marie G R P | Directional resonance coupler with cylindrical resonance cavities and slot coupling and crossover network built from it |
| CN101150224A (en) * | 2007-10-31 | 2008-03-26 | 中国电子科技集团公司第三十八研究所 | Broadband dual L wave guide narrow edge gap antenna array |
| JP2008131488A (en) * | 2006-11-22 | 2008-06-05 | New Japan Radio Co Ltd | Bandpass filter |
| CN204011734U (en) * | 2013-09-29 | 2014-12-10 | 中国电子科技集团公司第三十八研究所 | A kind of circular polarized antenna |
| CN108321553A (en) * | 2018-04-02 | 2018-07-24 | 珠海纳睿达科技有限公司 | Dual polarization Waveguide slot array antenna |
| CN110380220A (en) * | 2019-07-20 | 2019-10-25 | 中国船舶重工集团公司第七二四研究所 | The broad beam figuration Waveguide slot antenna and design method of non-uniform Distribution |
-
2022
- 2022-01-20 CN CN202210064969.XA patent/CN114122655B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1016783B (en) * | 1955-06-30 | 1957-10-03 | Marie G R P | Directional resonance coupler with cylindrical resonance cavities and slot coupling and crossover network built from it |
| JP2008131488A (en) * | 2006-11-22 | 2008-06-05 | New Japan Radio Co Ltd | Bandpass filter |
| CN101150224A (en) * | 2007-10-31 | 2008-03-26 | 中国电子科技集团公司第三十八研究所 | Broadband dual L wave guide narrow edge gap antenna array |
| CN204011734U (en) * | 2013-09-29 | 2014-12-10 | 中国电子科技集团公司第三十八研究所 | A kind of circular polarized antenna |
| CN108321553A (en) * | 2018-04-02 | 2018-07-24 | 珠海纳睿达科技有限公司 | Dual polarization Waveguide slot array antenna |
| CN110380220A (en) * | 2019-07-20 | 2019-10-25 | 中国船舶重工集团公司第七二四研究所 | The broad beam figuration Waveguide slot antenna and design method of non-uniform Distribution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114122655B (en) | 2022-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3510593B2 (en) | Planar antenna | |
| US7639183B2 (en) | Circularly polarized antenna and radar device using the same | |
| US6424298B1 (en) | Microstrip array antenna | |
| JP5091044B2 (en) | Microstrip array antenna | |
| JP2001111336A (en) | Microstrip array antenna | |
| CN114122655B (en) | Slot waveguide and waveguide slot array antenna | |
| US11444384B2 (en) | Multiple-port radiating element | |
| CN112531352A (en) | Broadband multi-polarization plane reflective array antenna | |
| US6781554B2 (en) | Compact wide scan periodically loaded edge slot waveguide array | |
| JPH05129825A (en) | Microstrip antenna | |
| JP3364829B2 (en) | Antenna device | |
| US5422652A (en) | Waveguide with non-inclined radiating slots excited by flat metal plates | |
| JP6289016B2 (en) | Monopulse radar antenna device | |
| US11450973B1 (en) | All metal wideband tapered slot phased array antenna | |
| Hirokawa et al. | Plate-laminated-waveguide corporate-feed slot array antennas with a polarization conversion layer | |
| JP3360118B2 (en) | Horizontally polarized antenna | |
| RU2761777C1 (en) | Multilayer printed circular polarized phased antenna array with wide-angle scanning (options) | |
| CN112909513B (en) | Dual-polarized waveguide slot array antenna on annular disc and combined antenna | |
| Endo et al. | Design of a circularly-polarized two-element microstrip antenna array excited by a cross slot on a broad wall of the rectangular waveguide for a waveguide-fed planar array | |
| US5821906A (en) | Rear feed source for reflector antenna | |
| Sato et al. | Design of a dual-ring microstrip antenna excited by an inclined slot on a narrow wall of the rectangular waveguide for a 45-degree linearly-polarized planar array | |
| Cao et al. | Design of A Pattern Reconfigurable Antenna for Grating Lobe Reduction of Planar Phased Arrays | |
| Bayraktar | A Dual Polarized Shared Aperture Compact Unit Cell Element for Antenna Array Applications | |
| JP2916412B2 (en) | Leaky wave NRD guide and planar antenna using leaky wave NRD guide | |
| US6100854A (en) | Antenna with one-way circular polarization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |