阅读说明：本技术 一种波纹喇叭天线 (Corrugated horn antenna ) 是由 漆一宏 蔡张华 于 2021-02-25 设计创作，主要内容包括：本公开提供了一种波纹喇叭天线,波纹喇叭天线的外壁设置有第一损耗部,第一损耗部将外壁包围一周,第一损耗部为电磁波损耗材料。本公开实施例的波纹喇叭天线在宽角度内的相位稳定性较好,并且在各个辐射面的相位中心一致性较好。(The utility model provides a corrugated horn antenna, corrugated horn antenna's outer wall is provided with first loss portion, and first loss portion surrounds the outer wall a week, and first loss portion is the electromagnetic wave loss material. The phase stability of the corrugated horn antenna in a wide angle is good, and the phase center consistency of each radiation surface is good.)

1. The utility model provides a ripple horn antenna which characterized in that, ripple horn antenna's outer wall is provided with first loss portion, first loss portion will the outer wall surrounds a week, first loss portion is the electromagnetic wave loss material.

2. The corrugated horn antenna of claim 1, wherein the first lossy portion is a dielectric material or a magnetic material.

3. The corrugated horn antenna of claim 1, wherein the first lossy portion is not lower than the outer wall.

4. The corrugated horn antenna of claim 1, wherein a transition loss section is disposed between the outer wall and the first loss section, the transition loss section being an electromagnetic wave loss material.

5. The corrugated horn antenna of claim 4, wherein the transition loss section is a semiconductor material.

6. The corrugated horn antenna according to any one of claims 1 to 5, wherein a second loss portion is provided in at least the outermost corrugated groove of the corrugated horn antenna, and the second loss portion is an electromagnetic wave loss material.

7. The corrugated horn antenna of claim 6, wherein the second lossy portion is in contact with both sidewalls of the corrugated slot.

8. The corrugated horn antenna of claim 6, wherein the second loss part is provided in 1 to 3 of the corrugated grooves on the outer side.

9. The corrugated horn antenna of claim 6, wherein the height of the second lossy portion is equal to the depth of the corrugated slot.

10. The corrugated horn antenna of claim 6, wherein the second lossy portion is a dielectric material.

Technical Field

The invention relates to the technical field of communication, in particular to a corrugated horn antenna.

Background

An antenna is an indispensable device for transmitting and receiving electromagnetic waves in wireless communication, and the performance of the antenna determines the efficiency of electromagnetic energy transmission in space. With the rapid development of communication technology, people put higher and higher requirements on the performance of antennas.

The corrugated horn antenna has the advantages of wide frequency band, low sidelobe, simple structure and the like, can be independently used as an antenna, and can also be used as a feed source of a reflector antenna in satellite communication, radio telescopes or compact range test systems. In some application scenarios, a corrugated horn antenna is required to have a stable phase center.

Disclosure of Invention

The present disclosure describes a corrugated horn antenna.

According to a first aspect of embodiments of the present disclosure, there is provided a corrugated horn antenna, an outer wall of which is provided with a first loss portion, the first loss portion surrounding the outer wall for one circle, the first loss portion being an electromagnetic wave loss material.

According to an embodiment of the corrugated horn antenna, the first lossy portion is a dielectric material or a magnetic material.

According to an embodiment of the corrugated horn antenna, the first lossy portion is not lower than the outer wall.

According to one embodiment of the corrugated horn antenna, a transition loss section is provided between the outer wall and the first loss section, the transition loss section being of an electromagnetic wave loss material.

According to an embodiment of the corrugated horn antenna, the transition loss section is a semiconductor material.

According to one embodiment of the corrugated horn antenna, the corrugated horn antenna is provided with a second loss part in at least the outermost corrugated groove, the second loss part being an electromagnetic wave loss material.

According to one embodiment of the corrugated horn antenna, the second lossy portion is in contact with both sidewalls of the corrugated slot.

According to one embodiment of the corrugated horn antenna, the second lossy portion is disposed in 1 to 3 of the corrugated slots located at the outer side.

According to an embodiment of the corrugated horn antenna, the height of the second lossy portion is equal to the depth of the corrugated slot.

According to an embodiment of the corrugated horn antenna, the second lossy portion is a dielectric material.

The embodiment of the disclosure suppresses the edge diffraction of the corrugated horn antenna by the arrangement of the loss part, and reduces the surface current of the horn edge, thereby improving the phase stability of the corrugated horn antenna in a wide angle and reducing the inconsistency of the phase centers of all the radiation surfaces.

Drawings

Fig. 1a is a schematic diagram of a corrugated horn antenna shown in the present disclosure according to one embodiment.

Fig. 1b is a cross-sectional view along axis Y in fig. 1 a.

Fig. 2a is a schematic diagram of a corrugated horn antenna shown in the present disclosure according to one embodiment.

Fig. 2b is a cross-sectional view along axis Y' in fig. 2 a.

Fig. 3a is a schematic diagram of a corrugated horn antenna shown in the present disclosure according to one embodiment.

FIG. 3b is a cross-sectional view taken along axis Y' of FIG. 3a

Fig. 4 is a schematic view of a corrugated horn antenna in the related art.

Fig. 5 is a schematic diagram of wide-angle phase fluctuation at 24GHz of a corrugated horn antenna in the related art.

Fig. 6 is a schematic diagram illustrating wide-angle phase fluctuation of a corrugated horn antenna at 24GHz according to one embodiment of the present disclosure.

Fig. 7 is a schematic diagram illustrating wide-angle phase fluctuation of a corrugated horn antenna at 24GHz according to one embodiment of the present disclosure.

Fig. 8 is a schematic diagram of wide-angle phase fluctuation at 32GHz of a corrugated horn antenna in the related art.

Fig. 9 is a schematic diagram illustrating wide-angle phase fluctuation of a corrugated horn antenna at 32GHz according to one embodiment of the present disclosure.

Fig. 10 is a schematic diagram illustrating wide-angle phase fluctuation of a corrugated horn antenna at 32GHz according to one embodiment of the present disclosure.

Fig. 11 is a schematic diagram of wide-angle phase fluctuation at 40GHz of a corrugated horn antenna in the related art.

Fig. 12 is a schematic diagram illustrating wide-angle phase fluctuation of a corrugated horn antenna at 40GHz according to one embodiment of the present disclosure.

Fig. 13 is a schematic diagram illustrating wide-angle phase fluctuation of a corrugated horn antenna at 40GHz according to one embodiment of the present disclosure.

Detailed Description

Embodiments of the present disclosure are described below with reference to the drawings. It should be understood that the drawings are not necessarily to scale. The described embodiments are exemplary and not intended to limit the present disclosure, which features may be combined with or substituted for those of the embodiments in the same or similar manner. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The corrugated horn antenna has the advantages of wide frequency band, low sidelobe, simple structure and the like, can be independently used as an antenna, and can also be used as a feed source of a reflector antenna in satellite communication, radio telescopes or compact range test systems. The corrugated horn antenna is provided with corrugated grooves on the inner wall, and the corrugated grooves play a role of choke, can reduce diffraction of electromagnetic waves at the edge of the horn, improve symmetry of a lobe pattern and reduce cross polarization (E field component in an H plane).

In wireless testing, corrugated horn antennas are often used as feeds for a Range of reflector systems such as Compact Antenna Test Range (CATR), which uses high precision reflectors to provide a quasi-plane wave Test zone in close proximity, thereby simulating a far-field electromagnetic environment in a small anechoic chamber. Compact range systems are widely used in the testing of antennas, radomes and low radar cross-section targets. In compact range systems, the feed characteristics have a large impact on the performance of the overall compact range system. Whether the phase center of the feed source is accurately arranged at the focus of the compact field reflecting surface directly influences the performance of the quiet zone. The engineering concept of phase centers is: the position on the central axis of the horn antenna is taken as a reference point, and the difference between the maximum phase and the minimum phase on the phase radiation pattern of the antenna at the position in a specified spherical range does not exceed the value required by design, so that the point can be regarded as the phase center of the antenna. The phase center of the feed source can move along with the change of frequency, the loss of phase errors is inevitable, and if the phase fluctuation of the feed source in a certain angle is large, the amplitude-phase characteristic of a compact field dead zone can be greatly deteriorated, so that the improvement of the stability of the phase center in a wide-bandwidth angle has great significance. The corrugated horn has a stable phase center, the corrugated grooves can guide current trend inside the horn and control harmful axial current, but at the edge and the outer wall of the horn, the current is relatively disordered, the adverse effect can be caused on radiation performance, the horn antenna still has large phase fluctuation in a wide angle, and the phase centers of different radiation surfaces have differences.

In view of this, an embodiment of an aspect of the present disclosure provides a corrugated horn antenna, and referring to fig. 1a to 1b, an outer wall 900 of the corrugated horn antenna is provided with a first lossy portion 100, the first lossy portion 100 is annular and surrounds the outer wall 900 for one circle, and the first lossy portion 100 is an electromagnetic wave lossy material. The first loss part reduces the surface current on the outer wall of the corrugated horn antenna through the loss action, the surface current at least partially comes from the diffraction current at the opening edge of the horn antenna, and the phase center stability of the corrugated horn antenna in a wide angle is improved through the inhibition action on the surface current, and the inconsistency of the phase centers of all radiation surfaces is reduced. Optionally, the top of the first lossy portion 100 is not lower than the outer wall 900, that is, the top of the first lossy portion 100 is flush with the top of the outer wall 900, or the top of the first lossy portion 100 is higher than the top of the outer wall 900, so as to be able to sufficiently absorb the surface current of the outer wall 900. The shape of the first lossy portion 100 is not limited to that shown in fig. 1a-1b, and may include a specific shape designed.

Further, referring to fig. 2a-2b, the corrugated horn antenna of the present disclosure may further include a transition loss section 300 between the outer wall 900 and the first loss section 100, in addition to the first loss section 100, where the transition loss section 300 is an electromagnetic wave loss material. The transition loss part 300 can be used as transition impedance matching between the metal outer wall 900 of the corrugated horn antenna and the first loss part 100, and meanwhile, the transition loss part 300 also has a certain loss effect, so that strong reflected signals can be prevented from being formed at the edge of the metal outer wall 900 to a certain extent.

Further, referring to fig. 3a to 3b, the corrugated horn antenna of the present disclosure may further include a second loss part 200 in a corrugated groove located at least at the outermost side on the basis of the first loss part 100 or the first loss part 100 and the transition loss part 300, wherein the second loss part 200 is an electromagnetic wave loss material. The second loss section 200 can suppress surface current near the opening edge of the corrugated horn antenna by a loss action. The shape of the second lossy portion 200 is not limited to that shown in fig. 3a-3b, and can include a particular shape that is designed, e.g., the top portion can have a non-planar shape, or can include multiple substructures that are discontinuous, etc. Optionally, the second lossy portion 200 contacts both sidewalls of the flute to enhance the lossy effect.

The height of the second lossy portion 200 can be substantially equal to the depth of the corrugated channel to avoid the second lossy portion 200 being too low for loss, or too high for shielding the primary radiation, and optionally the height of the second lossy portion 200 is equal to the depth of the corrugated channel.

The number of flutes provided with second lossy portions is not limited to that shown in fig. 3a-3b, and alternatively, the second lossy portions are provided in 1-3 flutes located on the outside. It can be understood that the main radiation energy of the corrugated horn antenna is concentrated at the part close to the center, and the current close to the outer side does not contribute much to the main radiation, but affects the cross polarization, symmetry and other properties of the horn. When the corrugated horn antenna includes a larger number of corrugated slots, the second loss part may be provided in more (more than 3) corrugated slots according to the current distribution.

The materials of the first lossy portion, the second lossy portion, and the transition lossy portion in each embodiment will be described. The first loss part, the second loss part and the transition loss part are all made of electromagnetic wave loss materials. Specifically, the first loss section may be made of a dielectric material having a loss mechanism of dielectric polarization relaxation loss, specifically, for example, a polymer composite material mixed with a conductive powder, or a magnetic material having a loss mechanism of mainly ferromagnetic resonance absorption, specifically, for example, a polymer composite material mixed with a metal or ferrite powder. The transition loss part can be made of semiconductor materials, and transition impedance matching between the first loss part and the outer wall of the antenna is achieved by utilizing the function of guiding current of the semiconductor materials. The second loss portion may be made of a dielectric material to avoid interference with radiation.

It should be noted that, in the related art, the structure of the corrugated horn antenna is not limited to that shown in the drawings of the foregoing embodiments, and referring to fig. 4, fig. 4 illustrates another corrugated horn antenna with another structure, and the corrugated horn antenna also has a plurality of corrugated slots.

The technical effects of the technical solutions of the present disclosure are exemplified herein. Referring to fig. 5-7, fig. 5-7 illustrate simulation results of phases of different corrugated horn antennas within a range of ± 30 ° (degree) at 24GHz, where the abscissa Theta is the vertical plane direction angle in a spherical coordinate system, Theta 0 ° is the main radiation direction of the corrugated horn antenna, and the ordinate is the phase of the main polarization electric field of the corrugated horn antenna, and phase fluctuation of Theta within ± 30 ° is shown. In each graph, four curves are the main polarized electric field phase direction diagrams when phi (horizontal plane direction angle in the spherical coordinate system) is 0 °, 45 °, 90 °, and 135 °. The corrugated horn antenna of fig. 5 is a typical corrugated horn antenna in the related art, and is in the form of an axially open round-mouth corrugated horn, which includes 6 corrugated groove structures. In contrast, fig. 6 shows a corrugated horn antenna of the same structure provided with a first loss part, which is provided on the outer wall of the horn antenna, completely surrounds the outer wall by one turn, and is higher than the outer wall. The first loss section is made of a dielectric electromagnetic wave loss material having a relative dielectric constant of about 1.45 and a loss tangent of about 0.3. And fig. 7 shows a corrugated horn antenna of the same structure in which a first loss part is provided on an outer wall of the horn antenna to completely surround the outer wall by one turn and has a height higher than that of the outer wall, and a second loss part is provided in a corrugated groove of the horn antenna on the outermost side to completely fill the corrugated groove by one turn, contacts with both side walls of the corrugated groove, and has a height equivalent to that of the corrugated groove. The first loss section and the second loss section are made of dielectric electromagnetic wave loss material, and have a relative dielectric constant of about 1.45 and a loss tangent of about 0.3. It can be seen that the maximum phase deviation of the related art corrugated horn antenna is about 8.1 ° as shown in fig. 5, the maximum phase deviation of the same-structured corrugated horn antenna provided with the first loss part is about 1.5 ° as shown in fig. 6, and the maximum phase deviation of the same-structured corrugated horn antenna provided with the first loss part and the second loss part is about 1.0 ° as shown in fig. 7, within a wide angle of ± 30 °.

Similar to fig. 5-7, fig. 8-10 are graphs comparing wide-angle phase fluctuations at 32GHz for the three corrugated horn antennas arranged as described above, respectively. It can be seen that the maximum phase deviations of the related art corrugated horn antenna, the corrugated horn antenna of the same structure in which the first lossy portion is provided, and the corrugated horn antenna of the same structure in which the first lossy portion and the second lossy portion are provided are about 10.0 °, 5.0 °, and 4.5 °, respectively, within a wide angle of ± 30 °.

Similar to fig. 5-7, fig. 11-13 are graphs comparing wide-angle phase fluctuations at 40GHz for the three corrugated horn antennas configured as described above, respectively. It can be seen that the maximum phase deviations of the related art corrugated horn antenna, the corrugated horn antenna of the same structure in which the first loss part is provided, and the corrugated horn antenna of the same structure in which the first loss part and the second loss part are provided are about 11.8 °, 4.2 °, and 3.4 °, respectively, within a wide angle of ± 30 °.

Therefore, the technical scheme of the disclosure has the technical effect of obviously improving the phase stability.

It should be noted that the drawings in the present disclosure are simplified schematic drawings, and are only used for schematically illustrating the positional relationship and the connection relationship between the parts in the embodiments.

In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the present disclosure, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.

Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.