CN115101937A - Horn feed source - Google Patents
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- CN115101937A CN115101937A CN202210696928.2A CN202210696928A CN115101937A CN 115101937 A CN115101937 A CN 115101937A CN 202210696928 A CN202210696928 A CN 202210696928A CN 115101937 A CN115101937 A CN 115101937A
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- 230000005855 radiation Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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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
- H01Q13/02—Waveguide horns
- H01Q13/0208—Corrugated horns
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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
- H01Q13/02—Waveguide horns
- H01Q13/0275—Ridged horns
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Abstract
The present disclosure provides a horn feed source, including: the short circuit board, the feed cavity, the double-groove horn, the ridge and the feed probe are connected in sequence; wherein the feed cavity comprises a feed section and a transition section; the short circuit plate is connected to the rear end of the feed section; the ridge comprises an upper ridge sheet and a lower ridge sheet, and the upper ridge sheet and the lower ridge sheet are fixed on the inner wall of the feed cavity; the upper ridge piece and the lower ridge piece positioned at the transition section of the feed cavity are in a four-stage step shape; the total length of the upper ridge piece and the lower ridge piece is the same as the length of the feed cavity; the front end of the feed cavity transition section is matched with the double-groove horn, and the centers of the upper ridge sheet, the lower ridge sheet, the feed cavity and the double-groove horn are the same; the feed probe is fixed on the outer wall of the feed cavity, an outer conductor of the feed probe penetrates through the feed cavity and the upper ridge piece, and an inner conductor of the feed probe is electrically connected with a screw for fixing the lower ridge piece through a hole on the lower ridge piece.
Description
Technical Field
The utility model relates to a reduce field feed technical field, concretely relates to loudspeaker feed.
Background
With the continuous development of compact range technology, the compact range has continuously increased requirements on the miniaturization of the feed source. The original standard wave band feed source adopts a scheme that waveguide coaxial transition is connected with a radiation section of the feed source through rectangular-circular transition, and the scheme has overlarge physical size at low frequency and cannot meet the requirement of compact range measurement. Broadband miniaturization is an inevitable direction of feed development. The ridge waveguide horn has a wide impedance bandwidth and has the potential of being used as a compact range feed source objectively, but the beam width of the ridge waveguide horn is reduced along with the increase of frequency, and the compact range needs the feed source to have a wide enough beam width, so that the ridge waveguide horn cannot be directly applied, and the requirement of the compact range on the feed source needs to be finely designed.
The ripple horn feed source is originally proposed by scholars of A.J. Simons and R.E.Lawrrie in 1966, and researches on the ripple horn feed source find that the ripple horn feed source has excellent performances of low side lobe level, low cross polarization, axial symmetry of amplitude phase relative to a feed source structure and the like, and a better secondary directional diagram can be obtained after the ripple horn feed source is used as a feed source of a reflecting surface feed source. As scholars such as b.m. thomas and p.j.b. clarricoats, etc. study on their basis theories and systems of electrical performance and radiation characteristics of the corrugated horn, the level of cross-polarization is improved. Later scholars have proposed some other types of corrugated walls that function to suppress the cross-polarization level. In 2002, scholars such as r.gonzao and j.teniente have studied how to better inhibit the side lobe level and cross polarization level of the corrugated horn, further reduce the axial length of the horn by using axial slot component mode conversion, propose to shape the radiation of the corrugated horn by a gaussian curve, and through a gaussian shaped radiation section, the free radiation space and the corrugated horn can be naturally transited, so as to generate ideal gaussian beam characteristics, realize the side lobe and cross polarization lower than-30 dB in 16% of the working bandwidth, and improve the beam efficiency. This form of corrugated horn structure lays a good foundation for the feed system.
The initial design of the double-ridged horn feed source can be traced back to 1973, Kerr designs a double-ridged horn feed source with a 1-12 GHz working frequency band, and the double-ridged horn feed source in the prior art has the advantages of small size, high power and the like, but also has some defects, such as: due to the limitation of the structure and the electric size of the common double-ridge horn feed source, the common double-ridge horn feed source is difficult to meet the requirement of high gain in a working frequency band, and the application range of the feed source is limited.
Therefore, there is a need to design a horn feed to meet the low frequency feed requirement of compact range.
Disclosure of Invention
The disclosed embodiment provides a horn feed source.
In a first aspect, an embodiment of the present disclosure provides a horn feed, including: the short circuit board, the feed cavity, the double-groove horn, the ridge and the feed probe are connected in sequence; wherein the feed cavity comprises a feed section and a transition section; the short circuit plate is connected to the rear end of the feed section;
the ridge comprises an upper ridge sheet and a lower ridge sheet, and the upper ridge sheet and the lower ridge sheet are fixed on the inner wall of the feed cavity; the upper ridge piece and the lower ridge piece positioned at the transition section of the feed cavity are in a four-stage step shape; the total length of the upper ridge piece and the lower ridge piece is the same as the length of the feed cavity;
the front end of the feed cavity transition section is matched with the double-groove horn, and the centers of the upper ridge sheet, the lower ridge sheet, the feed cavity and the double-groove horn are the same;
the feed probe is fixed on the outer wall of the feed cavity, an outer conductor of the feed probe penetrates through the feed cavity and the upper ridge piece, and an inner conductor of the feed probe is electrically connected with a screw for fixing the lower ridge piece through a hole on the lower ridge piece.
Furthermore, the feed probe adopts a semi-rigid coaxial cable feed connector connected with an SMA connector.
Further, the double-groove horn adopts an axial circular waveguide double-groove corrugated horn.
Furthermore, the feed section is cylindrical, the transition section is conical with an opening angle, the range of the opening angle is between 12 and 16 degrees, and the length of the feed cavity is between 0.6 and 0.8 lambda c; and λ c is the wavelength corresponding to the lowest working frequency of the horn feed source.
Furthermore, the diameter of the inner wall of the double-groove horn is 0.7-0.82 lambda c; the diameter of a rear end circle of the transition section of the feeding cavity is 0.36-0.43 lambda c.
Furthermore, the upper ridge sheet, the lower ridge sheet and the feed cavity form a ridge waveguide; the thickness of the ridge waveguide is 0.073-0.085 lambda c, the distance between the upper ridge sheet and the lower ridge sheet is 0.011-0.022 lambda c, and the distance between the feed probe and the short-circuit board is 0.17-0.21 lambda c.
Furthermore, the length of each step of the four-step shape in the upper ridge sheet and the lower ridge sheet is the same and is between 0.18 and 0.22 lambdac; the widths of the front three-stage steps from the rear end of the feed cavity transition section are sequentially increased and are respectively between 0.01-0.02 lambda c, 0.06-0.1 lambda c and 0.12-0.16 lambda c; the width of the last step is 0.1-0.15 lambdac; the length of the upper ridge piece or the lower ridge piece located on the feeding section part of the feeding cavity is 0.12-0.16 lambda c, and the width of the upper ridge piece or the lower ridge piece is 0.12-0.16 lambda c.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the broadband single-polarization double-ridge feed circular waveguide horn feed source has the advantages that the feed cavity is small in electrical size and can realize high-order mode suppression, the ridge waveguide part is matched with the outer wall of the double-groove horn and adopts a stepped opening structure, the working bandwidth can be effectively expanded, and the voltage standing wave ratio is reduced; the feed probe adopts a coaxial cable connected with a standard coaxial connector; a waveguide transition section from the feed cavity to the double-groove horn radiation section adopts a smaller horn opening angle, so that the phase difference of a high-frequency mouth surface field is further reduced; the horn feed source adopts the design of an axial double-groove corrugated horn, so that beams with broadband equalization, stable phase centers and low cross polarization can be realized, and the voltage standing wave ratio is less than 1.5 by optimizing the full frequency band of the rear feed source. The double-ridge horn feed source has the outstanding advantages of simple structure, small volume, light weight and low cost.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Other features, objects, and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a schematic view of a vertical cross section of a structure of a broadband ridge double-ridge circular horn feed according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a spine piece according to an embodiment of the present disclosure;
wherein, the reference numbers in the figures mean: 1 is the short circuit board, 2 is the feed cavity, 3 is two feed probes, 4 is last spine, 5 is the screw, 6 is the screw, 7 is loudspeaker, 8 is the nut, 9 is the screw, 10 is down the spine, 11 is the screw.
Detailed Description
Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.
In the present disclosure, it is to be understood that terms such as "including" or "having," etc., are intended to indicate the presence of the disclosed features, numbers, steps, actions, components, parts, or combinations thereof, and do not preclude the possibility that one or more other features, numbers, steps, actions, components, parts, or combinations thereof are present or added.
It should be further noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The present disclosure provides a horn feed source, including: the short circuit board, the feed cavity, the double-groove horn, the ridge and the feed probe are connected in sequence; wherein the feed cavity comprises a feed section and a transition section; the short circuit plate is connected to the rear end of the feed section; the ridge comprises an upper ridge sheet and a lower ridge sheet, and the upper ridge sheet and the lower ridge sheet are fixed on the inner wall of the feed cavity; the upper ridge piece and the lower ridge piece positioned at the transition section of the feed cavity are in a four-stage step shape; the total length of the upper ridge piece and the lower ridge piece is the same as the length of the feed cavity; the front end of the feed cavity transition section is matched with the double-groove horn, and the centers of the upper ridge sheet, the lower ridge sheet, the feed cavity and the double-groove horn are the same; the feed probe is fixed on the outer wall of the feed cavity, an outer conductor of the feed probe penetrates through the feed cavity and the upper ridge piece, and an inner conductor of the feed probe is electrically connected with a screw for fixing the lower ridge piece through a hole on the lower ridge piece. This is disclosed has good impedance bandwidth according to the double ridge loudspeaker feed source, better return loss, through to this disclosed double groove loudspeaker's internal diameter, double groove loudspeaker's groove size, go up the echelonment spine curvilinear dimension of spine piece and lower spine piece, go up spine piece interval and double groove loudspeaker, feed cavity's axial length's etc. critical dimension design, make the ridge waveguide loudspeaker after the design can gain the impedance bandwidth as wide as possible in the polarization direction, make the low frequency cut-off frequency of ridge waveguide loudspeaker reduce, through reasonable design spine piece shape, effectively reduce the standing-wave ratio under the circumstances of guaranteeing the bandwidth.
According to the above concept, the technical solution of the present disclosure is described in detail by embodiments.
Fig. 1 shows a schematic structural vertical cross-sectional view of a broadband single-polarized double-ridge feed circular waveguide horn feed according to an embodiment of the present disclosure. As shown in fig. 1, the broadband single-polarized double-ridge feed circular waveguide horn feed comprises: the double-groove feed type antenna comprises a double-groove horn 7, a ridge, a feed cavity 2, a short circuit board 1 and a feed probe 3, wherein the feed probe adopts a semi-rigid coaxial cable feed connector connected with an SMA (miniature version A) connector;
the ridge is composed of an upper ridge sheet 4 and a lower ridge sheet 10 which are in a step shape, and the step-shaped ridge sheet (including the upper ridge sheet 4 and the lower ridge sheet 10), the double-groove horn 7, the feed cavity 2 and the short circuit plate 1 sequentially form a broadband single-polarization double-ridge feed circular waveguide horn feed source. Wherein, the double-groove horn 7 is an axial circular waveguide double-groove corrugated horn.
The stepped ridge pieces 4 and 10 are mounted on the inner wall of the feed cavity 2 through screws, the feed probe 3 is fixed on the outer wall of the feed cavity 2, the feed probe 3 penetrates through the feed cavity 2 and the upper ridge piece 4, an inner conductor of the feed probe 3 is electrically connected with the screws through hole positions on the lower ridge piece 10, and the performance of the horn feed source is improved in a screw fixing mode.
In the horn feed source, a feed cavity 2 is divided into two sections, namely a feed section and a transition section, wherein the feed section is cylindrical, and the transition section is conical with an opening angle; the rear end of the feed section is connected with the short circuit board, the front end of the feed section is connected with the rear end of the transition section with smaller diameter, and the front end of the transition section with larger diameter is matched with the double-groove horn 7. The length of the feed cavity 2 is between 0.6 and 0.8 lambda c, wherein lambda c is the wavelength corresponding to the set lowest working frequency, and the diameter of the inner wall of the double-groove loudspeaker 7 is between 0.7 and 0.82 lambda c; the opening angle of the transition section of the feed cavity 2 is 12-16 degrees, the total length of the feed cavity 2 is 0.9-1.05 lambda c, and the diameter of the cylinder of the feed section of the feed cavity 2 is 0.36-0.43 lambda c.
In the horn feed source, an upper ridge piece 4, a lower ridge piece 10 and a feed cavity 2 form a ridge waveguide, wherein the thickness of the ridge waveguide is 0.073-0.085 lambda c, the shortest distance between two ridge pieces of the ridge waveguide part (namely the distance between the upper ridge piece and the lower ridge piece at the rear end part with the smaller diameter of the transition section of the feed cavity) is 0.011-0.022 lambda c, and the distance between a semi-rigid coaxial cable feed joint connected by an SMA joint and a short circuit board 1 is 0.17-0.21 lambda c.
In the horn feed source, a stepped ridge curve of a ridge waveguide is arranged according to a fixed step shape, planes (namely, a left surface and a right surface in fig. 2) at the upper end and the lower end of the ridge curve are parallel to the inner wall of a feed section of a feed cavity 2, the ridge curve is shown in fig. 2, wherein the lengths of four-stage stepped steps of an upper ridge sheet and a lower ridge sheet are the same, namely, e is between 0.18 and 0.22 lambda c, f is between 0.18 and 0.22 lambda c, and g is between 0.18 and 0.22 lambda c; starting from the rear end of the transition section with a smaller diameter of the feeding cavity, the widths of the front three steps are sequentially increased, namely b is between 0.12 and 0.16 lambda c, c is between 0.06 and 0.1 lambda c, d is between 0.01 and 0.02 lambda c, the width a of the fourth step is between 0.1 and 0.15 lambda c, lambda c is the wavelength corresponding to the lowest working frequency, the length h of the upper ridge piece and the lower ridge piece at the part of the feeding section is between 0.16 and 0.20 lambda c, the width j of the upper ridge piece and the lower ridge piece at the part of the feeding section is between 0.12 and 0.16 lambda c, the distance i between the upper ridge piece and the lower ridge piece at the part of the feeding section and the part at the rear end of the transition section is between 0.04 and 0.06 lambda c, the length k of the feeding cavity feeding section is between 0.23 and 0.27 lambda c, and the total length of the upper ridge piece and the lower ridge piece is the same as the length of the feeding cavity.
In the horn feed source, the distance between an upper ridge piece 4 and a lower ridge piece 10 is 0.011-0.022 lambda c, the distance between a half-rigid coaxial cable feed connector 3 connected by an SMA connector and a short circuit board 1 is 0.17-0.21 lambda c, and the metal part of the connector is fixed by a screw so that the electrical connector 3 and the upper ridge piece 4 are in good electrical contact.
Wherein, the feed source main body is composed of metal which is selected from: aluminum, iron, tin, copper, silver, gold, platinum, and alloys of the foregoing.
The technical scheme principle of the disclosure lies in:
the horn feed source provided in the embodiment of the disclosure is a broadband feed source for compact range testing. The horn feed source is in a four-stage step shape through a specific step-shaped ridge curve (shown in figure 2) and an opening angle of a feed cavity is 12-16 degrees, the upper ridge piece and the lower ridge piece are in four-stage step shapes, the length of each stage of step of the upper ridge piece (and/or the lower ridge piece), namely the length of g, f and e (the length of the last stage is not shown in the figure), the width of each stage of step of the upper ridge piece (and/or the lower ridge piece), namely d, c and b, is sequentially increased, and the total length l of the upper ridge piece and the lower ridge piece is the same as the length of the feed cavity 2. The characteristic impedance of the main mode of the ridge waveguide and the characteristic impedance of the coaxial line can achieve a good matching effect, the cut-off frequency of the main mode is effectively reduced, and the return loss of the horn is greatly reduced, so that the standing wave performance of the horn is improved, and the working bandwidth of the horn is enlarged; and the ridge sheet is in a step shape, so that the processing is convenient. By setting ridge curve parameters (including the lengths of a-k in the graph of fig. 2), the length of the feed source is reduced to the maximum extent, and the volume of the feed source is effectively reduced.
This disclosure compares advantage with prior art and lies in:
(1) the double-ridge sheet of the stepped ridge curve with a specific size shown in figure 2 is introduced in combination with the requirement of a compact range on the feed source, so that the working frequency band of the double-ridge horn feed source is widened, and the standing wave is greatly reduced.
(2) This openly combines actual demand to carry out optimal design to the ridge piece spine curve shape of feed, feed cavity opening angle etc for the feed satisfies measurement demand completely.
(3) This is disclosed through introducing the two ridge loudspeaker schemes that two ridge pieces and double flute loudspeaker are constituteed in the feed design, has realized the low standing wave work of single polarization in 1.7 ~ 2.6GHz frequency range, has improved efficiency of software testing greatly.
The technical details of the present disclosure are further described below by one possible implementation.
As shown in FIG. 1-2, the working frequency realized by the horn feed source is exemplified as 1.7-2.6 GHz. It can be appreciated that the horn feeds implement different operating frequencies and that the dimensions of the components in the horn feeds vary.
When the horn feed source with the working frequency of 1.7-2.6 GHz is realized, firstly, the size and the length of a big circle at the front end of a feed cavity of the double-ridge horn feed source are determined, namely, the size and the length of an opening surface are determined, the size of the opening surface is mainly determined by the lowest frequency, the opening surface of the traditional double-ridge horn feed source needs to be larger than half of the lowest working frequency and corresponds to 0.85GHz, the selection of the opening surface is larger than 176mm, the length of the corresponding feed source is in accordance with the principle of optimal horn design, the phase difference of the opening surface is considered to be as small as possible, the length of the horn is selected to be 1.2-1.4 times of the size of the opening surface, and the opening angle of a transition section of the feed cavity is selected to be 12-16 degrees.
Selecting a main mode TE of the ridge waveguide according to a magnetic field integral equation method provided by BALANIS 10 The range of the single-mode working frequency band is 1 GHz-6 GHz, and the thickness of the four ridge waveguides and the ridge waveguide spacing are respectively determined to be 0.073-0.085 lambda c and 0.01-0.02 lambda c. And optimally designing the distance between a semi-rigid coaxial cable feed joint connected by an SMA joint and the short-circuit plate so as to reduce the standing-wave ratio to the maximum extent, wherein the optimized size is between 0.17 and 0.20 lambda c.
Feed source processing has certain error in actual engineering, need give corresponding machining tolerance in the design, because machining error exists, and good electric contact is hardly guaranteed with the back chamber to two spines of spine loudspeaker, and emulation and experiment all prove, if two spines of spine loudspeaker do not have good electric contact with the back chamber and will produce very big influence to the standing wave of spine loudspeaker. Therefore, conductive adhesive is added in the design to connect the ridge and the rear cavity, and the ridge is in good electric contact with the feed cavity. In addition, the electrical connection between the ridge of the ridge horn and the feed cavity is ensured by screw connection.
The feed cavity size design is mainly based on the standing wave optimization of the double-groove waveguide horn, the width of the feed cavity 2 is 0.9-1.05 lambda c in a preferred embodiment of the disclosure, the front end of a transition section of the feed cavity is matched with the double-groove horn, the diameter of a circle at the front end of the transition section is the same as the inner diameter of the double-groove horn, and the diameter of a circle at the rear end of the transition section is the same as the diameter of a circle at the feed section and is 0.36-0.43 lambda c. The feed probe 3 is a semi-rigid coaxial cable feed connector connected by an SMA connector, and the diameter of the cable is less than 7 mm.
The improved double-ridge horn feed source can be processed by adopting metal with good electric conduction such as aluminum, copper and the like, and as a preferred embodiment, hard aluminum is adopted as a processing material.
The horn feed source can be used as a compact range transmitting feed source and a compact range receiving feed source. The method is mainly used for the conventional test of the compact range, can be used as a feed source of the compact range and a feed source of an RCS (radar cross section) measuring system, and can also be used as a test probe of the quiet zone of the compact range, thereby realizing high-efficiency quiet zone test.
The broadband single-polarization double-ridge feed circular waveguide horn feed source has the advantages that the feed cavity is small in electrical size and can realize high-order mode suppression, the ridge waveguide part is matched with the outer wall of the double-groove horn and adopts a stepped opening structure, the working bandwidth can be effectively expanded, and the voltage standing wave ratio is reduced; the feed probe adopts a coaxial cable connected with a standard coaxial connector; a waveguide transition section from the feed cavity to the double-groove horn radiation section adopts a smaller horn opening angle, so that the phase difference of a high-frequency mouth surface field is further reduced; the horn feed source adopts the design of an axial double-groove corrugated horn, so that beams with broadband equalization, stable phase centers and low cross polarization can be realized, the full frequency band of the rear feed source is optimized, and the voltage standing wave ratio is less than 1.5. The double-ridge horn feed source has the outstanding advantages of simple structure, small volume, light weight and low cost.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Claims (7)
1. A horn feed, comprising: the short circuit board, the feed cavity, the double-groove horn, the ridge and the feed probe are connected in sequence; wherein the feed cavity comprises a feed section and a transition section; the short circuit plate is connected to the rear end of the feed section;
the ridge comprises an upper ridge sheet and a lower ridge sheet, and the upper ridge sheet and the lower ridge sheet are fixed on the inner wall of the feed cavity; the upper ridge piece and the lower ridge piece positioned at the transition section of the feed cavity are in a four-stage step shape; the total length of the upper ridge piece and the lower ridge piece is the same as the length of the feed cavity;
the front end of the feed cavity transition section is matched with the double-groove horn, and the centers of the upper ridge sheet, the lower ridge sheet, the feed cavity and the double-groove horn are the same;
the feed probe is fixed on the outer wall of the feed cavity, an outer conductor of the feed probe penetrates through the feed cavity and the upper ridge piece, and an inner conductor of the feed probe is electrically connected with a screw for fixing the lower ridge piece through a hole on the lower ridge piece.
2. The horn feed of claim 1, wherein the feed probe employs a semi-rigid coaxial cable feed joint connected by an SMA joint.
3. The horn feed of claim 1, wherein the double-slotted horn employs an axial circular waveguide double-slotted corrugated horn.
4. The horn feed of claim 1 wherein the feed section is cylindrical, the transition section is conical with an opening angle in the range of 12 ° to 16 °, and the length of the feed cavity is in the range of 0.6 λ c to 0.8 λ c; and λ c is the wavelength corresponding to the lowest working frequency of the horn feed source.
5. The horn feed of claim 1, wherein the diameter of the inner wall of the double-groove horn is between 0.7 and 0.82 λ c; the diameter of a rear end circle of the transition section of the feeding cavity is 0.36-0.43 lambda c.
6. The horn feed of claim 1, wherein the upper ridge patch, the lower ridge patch and the feed cavity constitute a ridge waveguide; the thickness of the ridge waveguide is 0.073-0.085 lambda c, the distance between the upper ridge sheet and the lower ridge sheet is 0.011-0.022 lambda c, and the distance between the feed probe and the short-circuit board is 0.17-0.21 lambda c.
7. The horn feed source of claim 1, wherein each step of the four-step shape in the upper ridge sheet and the lower ridge sheet has the same length, and is between 0.18 and 0.22 lambdac; the widths of the front three-stage steps from the rear end of the feed cavity transition section are sequentially increased and are respectively between 0.01-0.02 lambda c, 0.06-0.1 lambda c and 0.12-0.16 lambda c; the width of the last step is 0.1-0.15 lambdac; the length of the upper ridge piece or the lower ridge piece located on the feeding section part of the feeding cavity is 0.12-0.16 lambda c, and the width of the upper ridge piece or the lower ridge piece is 0.12-0.16 lambda c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210696928.2A CN115101937B (en) | 2022-06-20 | 2022-06-20 | Horn feed source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210696928.2A CN115101937B (en) | 2022-06-20 | 2022-06-20 | Horn feed source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115101937A true CN115101937A (en) | 2022-09-23 |
| CN115101937B CN115101937B (en) | 2023-11-03 |
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| CN115101937B (en) | 2023-11-03 |
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