CN206211019U - Compact-folded monopulse antenna - Google Patents

Abstract

The utility model discloses compact-folded monopulse antenna, is related to monopulse antenna technical field, and it includes：Two folded antenna units, sum-difference network and antenna houses, folded antenna unit is symmetricly set on the inwall of antenna house, sum-difference network is arranged on antenna house bottom, antenna house includes the barrel-shaped cover of medium, two antenna slots, antenna slot is opened in inside the barrel-shaped cover of medium respectively, and the folded antenna unit is provided with inside antenna slot, and it is loose that the utility model solves structure in the prior art, quality is big, and zero deeply spends inadequate technical problem.

Description

Compact Folded Monopulse Antenna

technical field

The utility model relates to the technical field of monopulse antennas, in particular to a compact foldable monopulse antenna.

Background technique

The traditional monopulse antenna used in the rocket launcher has a huge structure and is inconvenient to carry and install. Since the entire antenna is located on the upper part of the launcher port, the symmetry becomes poor, so the zero depth of the antenna is relatively shallow, the process consistency is poor, and the tail lobe gain is too high. High, which seriously affects the performance of the monopulse antenna;

The authorized notification number is CN 102354799 B, which includes a pair of bow-tie radiation patches, a dielectric substrate, a delay line and a loading resistor; the bow-tie radiation patch is located on one side of the dielectric substrate, and the delay line and loading resistor are located on the other side of the dielectric substrate ; The loading resistance is distributed on the delay line; the inner end of the two bow-tie radiation patches is the feeding end of the bow-tie pulse antenna, and the other end is the radiation end of the bow-tie pulse antenna; several delay lines are located in the two bow-tie radiation patches In the area on the back of the dielectric substrate, one end of the delay line in each area is connected to the radiation end of the antenna through a metallized via hole, and the other end intersects with the ends of other delay lines in the same area at the convergence point of the delay line. The delay of the two areas The lines are connected through the connecting line through the convergence point. This patent has carried out resistance loading with a connecting delay line on the bow tie pulse antenna, which effectively reduces the amplitude of the trailing pulse in the radiation waveform, broadens the impedance bandwidth of the antenna, and reduces the impact of the loading resistance on the pulse. The adverse effects of the radiation efficiency of the antenna, but this patent does not solve the technical problems of the existing antenna with relatively shallow zero depth, poor process consistency, and excessively high taillobe gain.

Utility model content

The purpose of the utility model is to provide a compact foldable monopulse antenna, which solves the technical problems of loose structure, large mass and insufficient zero depth in the prior art.

A compact folded monopulse antenna, comprising: two folded antenna units, a circular barrel-shaped sum-and-difference network and a circular-barrel-shaped radome, the folded antenna units are arranged symmetrically inside the wall of the radome, the sum-difference The network is arranged at the bottom of the radome. The radome includes a dielectric barrel cover and two antenna slots. The antenna slots are respectively opened inside the dielectric barrel cover. The folded antenna unit is installed inside the antenna slot.

On the basis of the above technical solution, the utility model can also be improved as follows:

Further, the folded antenna unit includes a radiating metal layer, a dielectric layer and a metal feeding network layer, the radiating metal layer is located above the dielectric layer, and the metal feeding network layer is located below the dielectric layer.

Further, the radiating metal layer includes an upper rectangular radiating metal layer, a middle rectangular radiating metal layer and a lower rectangular radiating metal layer, the lower edge of the upper rectangular radiating metal layer intersects with the upper edge of the middle rectangular radiating metal layer to form a second An obtuse angle, the upper edge of the lower rectangular radiating metal layer intersects with the lower edge of the middle rectangular radiating metal layer to form a second obtuse angle.

Further, a gap is opened in the middle of the middle rectangular radiating metal layer.

Further, the dielectric layer includes an upper dielectric layer, a middle dielectric layer and a lower dielectric layer, the lower edge of the upper dielectric layer intersects with the upper edge of the middle dielectric layer to form a third obtuse angle, the lower dielectric layer The upper edge intersects with the lower edge of the medium layer to form a fourth obtuse angle, the angle of the first obtuse angle is connected to the angle of the third obtuse angle, and the angle of the second obtuse angle is the same as the angle of the fourth obtuse angle. The beneficial effect of this step is to facilitate the integration of the folded antenna unit.

Further, the sum-difference network includes two annular metal layers, two annular dielectric layers, and an arc-shaped metal layer, the annular dielectric layers are located above and below the arc-shaped metal layers, and the annular metal layers are respectively located on the Outside the annular dielectric layer, the arc-shaped metal layer is an arc-shaped end-to-end annular microstrip line, and the arc-shaped metal layer is sequentially provided with two input ports, a sum output port and a difference output port.

Further, the metal feed network layer includes an upper microstrip line, a middle microstrip line and a lower microstrip line, and the upper microstrip line, the middle microstrip line and the lower microstrip line are connected end to end to form a hook shape, and the The middle microstrip line spans the gap, and the lower microstrip line is connected to the input port of the sum-difference network through a coaxial cable.

The beneficial effects of the utility model:

The utility model divides the monopulse antenna into a folding antenna unit, an annular barrel-shaped sum difference network and an annular barrel-shaped radome, so that the antenna unit, the sum difference network and the radome can be completely integrated; the utility model significantly reduces The thickness of the radome is reduced, and the conformal shape between the antenna and the radome is realized at the same time. The structure size is compact, the mass is small, and it is easy to carry and install; 20dB and beam gain (typical value over 6dB); the utility model reduces the amplitude of the side lobe of the sum beam.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the structural representation of the compact folded monopulse antenna described in the specific embodiment of the utility model;

Fig. 2 is a schematic structural diagram of a folded antenna unit of a compact folded monopulse antenna described in a specific embodiment of the present invention;

Fig. 3 is a cross-sectional view of the sum-difference network of the compact folded monopulse antenna described in a specific embodiment of the present invention;

Fig. 4 is a schematic diagram of the arc-shaped metal layer structure of the compact folded monopulse antenna described in a specific embodiment of the present invention;

Fig. 5 is a schematic diagram of the metal feed network layer structure of the compact folded monopulse antenna described in a specific embodiment of the present invention;

Reference signs:

1-folded antenna unit; 2-sum and difference network; 3-radome; 4-dielectric barrel cover; 5-antenna slot; 6-radiating metal layer; 7-dielectric layer; 8-metal feed network layer; 9- Upper rectangular radiating metal layer; 10-middle rectangular radiating metal layer; 11-lower rectangular radiating metal layer; 12-first obtuse angle; 13-second obtuse angle; 14-gap; 15-upper dielectric layer; 16-middle dielectric layer; 17-lower dielectric layer; 18-third obtuse angle; 19-fourth obtuse angle; 20-annular metal layer; 21-annular dielectric layer; 22-arc metal layer; 23-input port; 24-differential output port; 25- and output port; 26-upper microstrip line; 27-middle microstrip line; 28-lower microstrip line.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Fig. 1 is a front view of a compact folded monopulse antenna described in a specific embodiment of the present invention.

As shown in Figure 1, the compact folded monopulse antenna provided by the utility model includes: two folded antenna units 1, an annular barrel-shaped sum-difference network 2 and an annular barrel-shaped radome 3, the folded antenna The unit 1 is arranged symmetrically inside the cover wall of the radome 3, and the zero depth index is less than -20dB through symmetrical ring placement; the sum and difference network 2 is arranged at the bottom of the radome, and the radome 3 includes a dielectric barrel cover 4, two Antenna groove 5, described antenna groove 5 is opened in the inside of medium barrel cover 4 respectively, and described antenna groove 5 is installed with described folded antenna unit 1, and the utility model is installed folded antenna unit 1 inside antenna groove 5, This can not only ensure the structural stability of the folded antenna unit 1, but also ensure the stability of the folded antenna unit 1, and through the antenna slot 5 symmetrical antenna unit, it can ensure that the working bandwidth of the antenna unit exceeds 100MHZ and the standing wave is below 1.5

Further, as shown in FIG. 2, the folded antenna unit 1 includes a radiation metal layer 6, a dielectric layer 7 and a metal feed network layer 8, the radiation metal layer 6 is located above the dielectric layer 7, and the metal feed network Layer 8 is located below dielectric layer 7 .

Further, as shown in FIG. 2 , the radiating metal layer 6 includes an upper rectangular radiating metal layer 9 , a middle rectangular radiating metal layer 10 and a lower rectangular radiating metal layer 11 , the lower edge of the upper rectangular radiating metal layer 9 is connected to the middle The upper edge of the rectangular radiating metal layer 10 intersects to form a first obtuse angle 12 , and the upper edge of the lower rectangular radiating metal layer 11 intersects and merges with the lower edge of the middle rectangular radiating metal layer 10 to form a second obtuse angle 13 .

Wherein, a gap 14 is opened in the middle of the middle rectangular radiating metal layer 10, and the gap 14 may be U-shaped or other shapes.

Further, the dielectric layer 7 includes an upper dielectric layer 15, a middle dielectric layer 16 and a lower dielectric layer 17, the lower edge of the upper dielectric layer 15 intersects with the upper edge of the middle dielectric layer 16 to form a third obtuse angle 18 , the upper edge of the lower dielectric layer 17 intersects with the lower edge of the middle dielectric layer 16 to form a fourth obtuse angle 19, the angle of the first obtuse angle 12 is the same as the angle of the third obtuse angle 18, and the second obtuse angle The angle of 13 is the same as the angle of the fourth obtuse angle 19 .

Further, as shown in Figures 3-4, the sum and difference network 2 includes two layers of annular metal layers 20, two layers of annular dielectric layers 21 and arc-shaped metal layers 22, and the annular dielectric layers 21 are respectively located on the arc-shaped metal layers. 22 above and below, the annular metal layer 20 is respectively located outside the annular dielectric layer 21, the arc-shaped metal layer 22 is an arc-shaped end-to-end annular microstrip line, and two input Port 23, sum output port 25 and difference output port 24. The utility model significantly improves antenna and beam gain by installing annular stripline and difference network at the bottom of the radome.

Further, as shown in FIG. 5, the metal feed network layer 8 includes an upper microstrip line 26, a middle microstrip line 27 and a lower microstrip line 28, and the upper microstrip line 26, the middle microstrip line 27 and The lower microstrip line 28 is connected end to end to form a hook, the middle microstrip line 27 spans the gap 14 , and the lower microstrip line 28 is connected to the input port 23 of the sum and difference network 2 through a coaxial cable.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (7)

1. The compact folded monopulse antenna is characterized in that it comprises: two folded antenna units, a circular barrel-shaped sum-difference network and a circular barrel-shaped radome, and the folded antenna unit is symmetrically arranged on the cover wall of the radome Inside, the sum and difference network is arranged at the bottom of the radome. The radome includes a dielectric barrel cover and two antenna slots. The antenna slots are respectively set inside the dielectric barrel cover. Fold the antenna unit. 2. The compact folded monopulse antenna according to claim 1, wherein the folded antenna unit comprises a radiating metal layer, a dielectric layer and a metal feeding network layer, the radiating metal layer is positioned above the dielectric layer, the The metal feed network layer is located below the dielectric layer. 3. The compact folded monopulse antenna according to claim 2, wherein the radiating metal layer comprises an upper rectangular radiating metal layer, a middle rectangular radiating metal layer and a lower rectangular radiating metal layer, and the upper rectangular radiating metal layer The lower edge meets the upper edge of the middle rectangular radiating metal layer to form a first obtuse angle, and the upper edge of the lower rectangular radiating metal layer meets the lower edge of the middle rectangular radiating metal layer to form a second obtuse angle. 4 . The compact folded monopulse antenna according to claim 3 , wherein a slit is opened in the middle of the middle rectangular radiating metal layer. 5. The compact folded monopulse antenna according to claim 4, wherein the dielectric layer comprises an upper dielectric layer, a middle dielectric layer and a lower dielectric layer, and the lower side edge of the upper dielectric layer is connected to the middle dielectric layer. The upper edges intersect and merge to form a third obtuse angle, the upper edge of the lower dielectric layer intersects and merges with the lower edge of the middle dielectric layer to form a fourth obtuse angle, the angle of the first obtuse angle is connected to the angle of the third obtuse angle, and the The angle of the second obtuse angle is the same as the angle of the fourth obtuse angle. 6. The compact folded monopulse antenna according to claim 5, wherein the sum-difference network comprises two ring-shaped metal layers, two ring-shaped dielectric layers, and an arc-shaped metal layer, and the ring-shaped dielectric layers are respectively located on the arc Above and below the circular metal layer, the circular metal layers are respectively located outside the circular dielectric layer, the curved metal layer is an arc-shaped end-to-end annular microstrip line, and two input ports are sequentially arranged on the arc-shaped metal layer , and the output port and the difference output port. 7. The compact folded monopulse antenna according to claim 6, wherein the metal feeding network layer comprises an upper microstrip line, a middle microstrip line and a lower microstrip line, and the upper microstrip line, the middle The microstrip line and the lower microstrip line are connected end to end to form a hook, the middle microstrip line straddles the gap, and the lower microstrip line is connected to the input port of the sum-difference network through a coaxial cable.