TWM464838U - Horn-shape antenna - Google Patents

Description

Flare antenna

This creation is related to a horn antenna, and more particularly to a horn antenna having a dielectric layer that improves isolation and directivity.

The horn antenna is a component of a signal transmission device (such as a satellite television antenna, etc.) for receiving signals of one or more specific frequency bands to feed the signal to the signal processor for transmission to the user terminal; or The antenna can also transmit signals that are processed in one or a plurality of specific frequency bands in the opposite direction.

Many horn antennas with different shapes and structures on the market are designed in such a way as to increase the isolation and directivity between the cross polarization and the co-polarization received by the horn antenna. The more common method is to provide a wrinkle-like side wave suppression structure. For example, the horn antenna provided by the patents of US Pat. No. 3,341, 364 and US Pat. No. 3,752, 273, the side wave suppression structure is disposed on the inner wall surface of the horn antenna. Further, for example, the horn antenna provided in the patent of the Japanese Patent No. I223469 has a side wave suppression structure which is provided on the outer periphery of the opening of the horn antenna and extends from the outer wall surface thereof.

The creator of this case is committed to the development of a horn antenna that is different from the conventional one, in order to improve the isolation and directivity of the cross-polarized wave received by the horn antenna and the main polarized wave by different methods, thereby enhancing the horn antenna. The effect.

The main purpose of this creation is to provide a horn antenna with a dielectric layer that improves isolation and directivity, so that the effect is better.

In order to achieve the above object, the horn antenna provided by the present invention comprises at least one waveguide unit, the waveguide unit comprises a tube body and two dielectric layers, the tube body has an opening, and at least one opening from the opening toward the tube The inner wall surface extending inside the body, the dielectric constant of each of the dielectric layers is greater than the dielectric constant of the air, the two dielectric layers are fixed on the inner wall surface of the pipe body, and the two dielectric layers are opposite.

Thereby, the dielectric layers cause the electromagnetic waves to be more phase-backed by the horn antenna, thereby increasing the isolation between the cross-polarized waves and the main polarized waves, and the dielectric layers can also increase the horn shape. The antenna is directional, so the horn antenna is more effective than the conventional one.

The detailed construction, features, assembly or use of the horn antenna provided by this creation will be described in the detailed description of the subsequent embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific embodiments of the present invention are merely used to illustrate the present invention and are not intended to limit the scope of the patent application.

10, 10'‧‧‧ horn antenna

12‧‧‧guide unit

122‧‧‧ Guided space

20‧‧‧ tube body

21‧‧‧First section

22‧‧‧Second section

221‧‧‧First inner wall

222‧‧‧Second inner wall

23‧‧‧ openings

232‧‧‧Longside

234‧‧‧ Short side

24‧‧‧Inlay

25‧‧‧ Interface

30‧‧‧Slanted side wave suppression structure

32‧‧‧ inner wall

40‧‧‧ dielectric layer

42‧‧‧ surface

43‧‧‧First block

44‧‧‧Second block

45‧‧‧ Groove

452‧‧‧Central area

454‧‧ ‧ diversion area

46‧‧‧ Connection surface

50‧‧‧Parallel side wave suppression structure

52‧‧‧ inner wall

60‧‧‧Torque antenna

62‧‧‧guide unit

70‧‧‧ tube body

73‧‧‧ openings

74‧‧‧ inner wall

80‧‧‧ tube body

83‧‧‧ openings

84‧‧‧ inner wall

90‧‧‧ tube body

93‧‧‧ openings

94‧‧‧ inner wall

941‧‧‧ first block

942‧‧‧Second block

L1‧‧‧ central axis

L2‧‧‧ long axis

L3‧‧‧ short axis

1 is an exploded perspective view of a horn antenna provided by a first preferred embodiment of the present invention; and FIG. 2 is an end view of the horn antenna provided by the first preferred embodiment; FIG. And FIG. 4 is a data diagram of E-Plane and H-Plane measured when the horn antenna provided in the first preferred embodiment is not provided with a dielectric layer; FIG. 5 and FIG. 6 respectively The horn antenna provided for the first preferred embodiment of the present invention The data map of E-Plane and H-Plane measured when there is a dielectric layer; FIG. 7 is an end view of the horn antenna provided by the second preferred embodiment of the present invention; An end view of the horn antenna provided by the third preferred embodiment; FIG. 9 is an end view of the horn antenna provided by the fourth preferred embodiment; FIG. 10 is a fifth preferred embodiment of the present invention. An end view of the horn antenna provided by the example; and FIG. 11 is an exploded perspective view of the horn antenna provided by the sixth preferred embodiment of the present invention.

The Applicant first describes the same or similar elements or structural features thereof in the embodiments and the drawings which will be described below.

Please refer to FIG. 1 and FIG. 2 (FIG. 2 is a front view of the enlarged view of FIG. 1 ). The horn antenna 10 provided in the first preferred embodiment of the present invention includes a three-conductor unit 12, each of which is The wave unit 12 includes a tube body 20, two inclined side wave suppression structures 30, and two dielectric layers 40. In other words, the horn antenna 10 provided in this embodiment includes six dielectric layers 40. In FIG. 1, only one of the dielectric layers 40 of the waveguide unit 12 is decomposed to display the medium more clearly. The shape of the layer 40, the remaining dielectric layer 40 is in a state of being fixed to the tube body 20.

In the present invention, a single waveguide unit includes a guided wave space for passing a signal wave of a specific frequency band (for example, a guided wave space 122 of the waveguide unit 12), and a main structure forming the guided wave space (for example, a tube body 20), and a dielectric layer 40 disposed in the waveguide space, and may be, but not limited to, a side wave suppression structure (eg, a tilted side wave suppression structure 30) including at least one pair of main structures; That is, if a horn antenna has a guided wave space, the horn antenna There is a guided wave unit, if there is a second guided wave space, there are two guided wave units, and so on.

Each of the tubular bodies 20 includes a first section 21 having a circular tubular shape, a second section 22 extending from one end of the first section 21 and having a tapered shape, and a second section 22 located in the second section 22 The opening 23 at one end defines a central axis L1 that passes substantially perpendicularly through the opening 23. Each of the openings 23 is elongated and can be defined as a long axis L2 by a line connecting the two points of the largest distance, and can define a short axis L3 substantially perpendicular to the long axis L2, each of the openings 23 having Two are respectively located at the two ends of the short axis L3 and are long sides 232 of a straight line, and two short sides 234 which are respectively located at the two ends of the long axis L2 and which are curved. The second section 22 has two first inner wall surfaces 221 extending from the two long sides 232 toward the inside of the tube body 20, and two second inner wall surfaces extending from the two short sides 234 toward the inside of the tube body 20 respectively. 222, and the inner wall surfaces 221, 222 extend obliquely from the one end of the opening 23 toward the opposite end toward the central axis L1. The long axes L2 of the waveguide units 12 are substantially parallel to each other, and the waveguide units 12 are arranged along a direction substantially perpendicular to the major axis L2 (ie, parallel to the minor axis L3).

In each of the waveguide units 12, the two inclined side wave suppression structures 30 are integrally connected to the outside of the tube body 20, and are respectively located at two ends of the long axis L2. Each of the inclined side wave suppression structures 30 has an inner wall surface 32 of the tube body 20, and the inner wall surface 32 extends obliquely from one end of the opening 23 to the opposite end toward the center axis L1. . Thereby, the inner wall surface 32 of each of the inclined side wave suppression structures 30 is inclined obliquely toward the opening 23 of the tube body 20, so that part of the electromagnetic waves can be reflected to a predetermined distance outside the opening 23, and the reflected wave and the unreflected The cross-polarization wave has a phase difference of 180 degrees, so that the reflected wave and the unreflected cross-polarized wave cancel each other; thus, each of the inclined side wave suppression structures 30 can achieve a good side wave suppression effect and avoid the horn antenna. The periphery of the opening produces edge diffraction, thereby reducing the cross-polarization wave Isolation from the main polarized wave.

In this embodiment, the two waveguide units 12 of the horn antenna 10 further include a parallel side wave suppression structure 50, and the parallel side wave suppression structures 50 are substantially parallel to the inner wall surface 52 of the tube body 20. At the center axis L1, the effect of suppressing the side wave can also be achieved.

In other words, each of the oblique side wave suppression structure 30 and the parallel side wave suppression structure 50 contributes to increasing the isolation of the cross-polarized wave received by the horn antenna 10 from the main polarization; however, the feature of the present invention is The dielectric layer 40 is used to increase the isolation and directivity of the horn antenna (this section will be described in detail below). Therefore, the horn antenna provided by the present invention is not limited to having the oblique side wave suppression structure 30 and the parallel side wave suppression structure. 50.

Each of the dielectric layers 40 is a sheet-like body made of a material having a medium constant greater than air, such as polypropylene (PP), alkylbenezenesulfonate (ABS), polyethylene (polyethylene). Referred to as PE), polycarbonate (PC), a mixture of ABS and PC, or other plastic materials, or other materials with low energy loss, such as glass. In each of the waveguide units 12, the two dielectric layers 40 are respectively fixed to the two first inner wall surfaces 221 by an adhesive. Therefore, the two dielectric layers 40 are respectively located at opposite ends of the short axis L3. The wavelength of the signal wave received by the horn antenna 10 in the dielectric layer 40 is defined as λ, and the thickness of each of the dielectric layers 40 is preferably between 0.005 λ and 0.25 λ.

Since the dielectric constants of the dielectric layers 40 are greater than the dielectric constant of the air, the electromagnetic waves are more phase-backed by the horn antenna 10, and thus the dielectric layers 40 increase the cross-polarized waves and the main polarized waves. Isolation. Moreover, the dielectric constant of the dielectric layer 40 is greater than the dielectric constant of the air to increase the width of the second inner wall surface 222 and the aforementioned wave. The ratio of the length λ further increases the directivity of the horn antenna 10. In other words, the horn antenna provided with the dielectric layers 40 has better isolation and directivity than the dielectric layer 40 is not provided.

Please refer to FIG. 3 to FIG. 6 . FIG. 3 and FIG. 4 respectively show the electromagnetic wave intensity of the E-Plane and H-Plane actually measured when the above-mentioned horn antenna 10 is not provided with the dielectric layer 40. Fig. 6 and Fig. 6 respectively show the intensity of the E-Plane and H-Plane measured when the above-mentioned horn antenna 10 is provided with the dielectric layer 40, and Fig. 4 and Fig. 6 show the isolation of the H-Plane. The dielectric layer 40 is significantly increased. In fact, the horn antenna 10 is disposed on the dish-shaped reflective antenna, and the actually measured isolation is increased by 4 dB compared to when the dielectric layer 40 is not provided. This is due to the dish reflection. The antenna depends on the isolation of the entire surface, and the addition of the dielectric layer narrows the waveform of the H-Plane cross-polarized wave.

Referring to FIG. 7, the horn antenna 60 provided in the second preferred embodiment of the present invention includes only a waveguide unit 62, which is similar to the waveguide unit 12 described above, but has no The side wave suppression structure, the waveguide unit 62 can also achieve the effect of increasing isolation and directivity by the dielectric layer 40 as described above.

In fact, the number of waveguide units of the horn antenna provided by the present invention is not limited and can be set according to requirements. In addition, the shape of the tube body of each waveguide unit is not limited, for example, Figures 8 and 9 In the third and fourth preferred embodiments of the present invention, the openings 73 and 83 of the tubes 70 and 80 are respectively rectangular and elliptical, that is, the openings 73 and 83 are elongated and can be defined as long. The shaft L2 and the short axis L3, the inner wall surfaces 74, 84 of the respective tubular bodies 70, 80 are fixed to the dielectric layer 40 at the two ends of the short axis L3.

The opening of the tubular body of the horn antenna provided by the present invention is not limited to an elongated shape. For example, the fifth preferred embodiment of the present invention shown in FIG. 10 has an opening 93 of the tubular body 90. The inner wall surface 94 of the tube body 90 is fixed with two opposite dielectric layers 40. The inner wall surface 94 can distinguish the first block 941 in which the dielectric layer 40 is fixed, and the second medium is not provided. The second block 942 of the layer 40, the first block 941 and the second block 942 are respectively approximately one quarter of the openings 93.

Referring to FIG. 11, the horn antenna 10' according to the sixth preferred embodiment of the present invention is similar to the horn antenna 10 provided in the first preferred embodiment, except that the horn antenna 10' The inner wall surface of each of the tubular bodies 20 is provided with two recessed grooves 24 to limit the dielectric layers 40 to the recessed grooves 24, respectively, so that the dielectric layers 40 are adhered to the tubular body 20 when they are adhered to the tubular body 20. It is not easy to stick, and the surface 42 of the dielectric layer 40 not fixed to the tubular body 20 is aligned with the inner wall surface of the tubular body 20, and the dielectric layer 40 is prevented from the first and second sections 21 of the tubular body 20. The interface 25 of the 22 blocks a part.

In addition, each of the dielectric layers 40 of the horn antenna 10' has a first block 43 having a larger thickness and a second block 44 having a smaller thickness, and the second block 44 is compared with the first block. The block 43 is further away from the opening 23 of the tubular body 20. Such a design is because the thickness of each of the dielectric layers 40 can affect the directivity of the horn antenna. The thicker the dielectric layer 40 is, the higher the directivity is. The thinner the dielectric layer 40 is, the lower the directivity is. The trumpet antenna is used to fabricate a dielectric layer having a constant thickness and a small thickness, and it may be difficult to adhere the dielectric layer to the tube due to the curl of the dielectric layer. In this case, the non-transistor as provided in this embodiment may be used. The dielectric layers of equal thickness make each of the dielectric layers not only easy to fix, but also enable the horn antenna to produce the desired directivity.

In addition, each of the dielectric layers 40 of the horn antenna 10 ′ further has a radial groove 45 , which is fixed from the dielectric layer 40 for fixing to a connecting surface 46 of the tubular body 20 . In an embodiment, the recess 45 includes a central portion 452 having a greater depth, and The number of the flow guiding regions 454 extending from the central region 452 and having a small depth is not limited thereto. Therefore, when the dielectric layer 40 is adhered to the tubular body 20, the adhesive can be first disposed in the central region 452, and then the dielectric layer 40 is pressed against the inner wall surface of the tubular body 20 by the connecting surface 46. The flow guiding region 454 guides the squeezed and diffused adhesive throughout the connecting surface 46 so that the adhesive can be evenly distributed and the adhesive is prevented from overflowing from the edge of the dielectric layer 40.

The features of the above-described horn antenna 10' can also be applied to other embodiments described above, so that the horn antennas of different shapes are easier to assemble or have better performance by the respective features.

It is to be noted that, in the foregoing embodiments, each of the dielectric layers 40 is first formed into a sheet-like body and then fixed to the inner wall surface of the tubular body 20; however, each of the dielectric layers 40 may also be coated with a molten material. The cloth or the injection molding is formed on the inner wall surface of the pipe body 20 to dry and solidify the material.

It can be seen from the foregoing that the main feature of the horn antenna provided by the present invention is that the inner wall surface of the tube body is provided with two opposite dielectric layers, and the dielectric layers can increase the cross-polarized wave received by the horn antenna. Isolation and directivity from the main polarized wave. The foregoing features can be applied to various types of horn antennas, and the number and arrangement of the waveguide units are not limited, and the shape of the tubes of the waveguide units is not limited, and can be set according to requirements.

Finally, it must be explained again that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention. Alternatives or variations of other equivalent elements should also be the scope of patent application of the present application. Covered.

10‧‧‧Torque antenna

12‧‧‧guide unit

122‧‧‧ Guided space

20‧‧‧ tube body

21‧‧‧First section

22‧‧‧Second section

23‧‧‧ openings

30‧‧‧Slanted side wave suppression structure

32‧‧‧ inner wall

40‧‧‧ dielectric layer

L1‧‧‧ central axis

Claims (18)

A horn antenna includes at least one waveguide unit, the waveguide unit includes: a tube body having an opening, and at least one inner wall surface extending from the opening toward the inside of the tube body; and two dielectric layers, each The dielectric constant of the dielectric layer is greater than the dielectric constant of the air, and the two dielectric layers are fixed to the inner wall surface of the tubular body, and the two dielectric layers are opposite. The horn antenna according to claim 1 is for receiving a signal wave, and the wavelength of the signal wave transmitted in the dielectric layer is defined as λ, and the thickness of each dielectric layer is between 0.005 λ to 0.25 λ. The horn antenna according to claim 1 or 2, wherein in the waveguide unit, the opening of the tube body is elongated and can be defined as a long axis by a line connecting the two points of the largest distance. And defining a short axis substantially perpendicular to the major axis, the two dielectric layers are respectively located at the two ends of the short axis. The horn antenna according to claim 3, comprising a plurality of the waveguide units, the long axes of the openings of the waveguide units being substantially parallel to each other, and the waveguide units are substantially vertical Arranged in the direction of the long axes. The horn antenna of claim 4, wherein the opening of the tube body is rectangular or elliptical. The horn antenna according to claim 3, wherein the opening of the tube body is rectangular or elliptical. The horn antenna according to claim 1 or 2, wherein in the waveguide unit, the opening of the tube body has two long sides and two short sides, and the inside of the tube body The wall surface comprises two first inner wall surfaces respectively extending from the two long sides toward the inner side of the tube body, and two second inner wall surfaces respectively extending from the two short sides toward the inner side of the tube body, and the two dielectric layers are respectively fixed On the first inner wall surface of the two. The horn antenna of claim 7, wherein the two long sides are straight lines and the two short sides are arcs. The horn antenna according to claim 1 or 2, wherein the opening of the tube is circular. The horn antenna according to claim 9, wherein the inner wall surface of the tube body can distinguish the first block in which the dielectric layer is fixed, and the second block in which the dielectric layer is not provided. The first block and the second block are substantially corresponding to a quarter of the openings, respectively. The horn antenna according to claim 1 or 2, wherein each of the dielectric layers is first formed into a sheet-like body and then fixed to an inner wall surface of the tube body. The horn antenna according to claim 11, wherein each of the dielectric layers has a connecting surface fixed to an inner wall surface of the tube body, and a recess recessed from the connecting surface. The horn antenna of claim 12, wherein the grooves of each of the dielectric layers are radially. The horn antenna according to claim 13, wherein the groove of each of the dielectric layers comprises a central portion having a larger depth, and a plurality of flow guiding regions extending from the central portion and having a smaller depth. The horn antenna of claim 11, wherein the inner wall surface of the tube body is provided with two recessed grooves to limit the two dielectric layers to the two recessed grooves. The horn antenna according to claim 1 or 2, wherein each of the dielectric layers is formed by curing or melting a molten material formed on an inner wall surface of the tubular body. The horn antenna of claim 1 or 2, wherein each of the dielectric layers has a first block having a larger thickness and a second block having a smaller thickness. The horn antenna of claim 17, wherein the second block of each of the dielectric layers is further away from the opening of the tubular body than the first block.