EP2924807A1

EP2924807A1 - Amplifying device for radar antenna

Info

Publication number: EP2924807A1
Application number: EP14003977.7A
Authority: EP
Inventors: Cesar Lopez Ferreiro
Original assignee: Adartia Servicios Sl
Current assignee: Adartia Servicios Sl
Priority date: 2014-03-28
Filing date: 2014-11-26
Publication date: 2015-09-30
Also published as: ES2546784B1; ES2546784A1

Abstract

The present invention is related to an amplifying device for radar antennas specially adapted for M3 double horn antenna topology including Fresnel lens, making possible firstly to focus and concentrate the signal for this kind of broad range of aperture applications. Secondly it provides the operation in vertical and horizontal polarization. The device is comprised of a first hollow amplifying unit which is pyramidal-trunk shape and a second support unit, wherein the amplifying unit is assembled, the symmetrical bases 2 which form two opposite faces of the pyramidal-trunk shaped amplifying unit are essentially isosceles trapezes, and wherein a tapered central and annular edge is disposed in relation to the minor base of the trapeze forming a convex perimeter.

Description

The present invention is related to an amplifying device for radar antennas.
In particular, the invention provides an amplifying device with pyramidal shape for radar antennas specially adapted for M3 double horn antenna topology including Fresnel lens, making possible firstly to focus and concentrate the signal for this kind of broad range of aperture applications. Secondly it provides the operation in vertical and horizontal polarization.
The pyramidal shaped amplifying device achieves increased capabilities for the radar antenna as well as a reduced discrimination of the polarity, besides a number of improvements in order to enhance the performance and effectiveness while it is particularly adapted to M3 double horn antenna topology, such as type Escort™ y Beltornics™.
In the field of this invention is known that the prior radar detection systems operating between 33.392-35.998 and 24.000-24.350 GHz usually do not have an appropriate gain for the safe detection and located to a distance in relation to the emitting source.
Furthermore the new advances made in this field of radar detection are using Fresnel lens technology, which provides a vertical to horizontal polarization, so detecting at the same distance those radars emitting in both vertical and horizontal polarization.
This invention enables to implement these new double horn antenna topologies including Fresnel lens as well as it provides the above mentioned amplifying device for radar antennas improving the detection relative to the cited data bandwidth and so as to make easier the installation by the user.
The present amplifying device for radar antenna is comprised of a first hollow amplifying unit 1 which is pyramidal-trunk shape, wherein the large base is oriented to the outside environment for the reception, enhancing the receptor properties relatives to the detection of radar signal into the above mentioned bandwidth. This first hollow amplifying unit 1 is supported by means a form-fitted coupling into a second support unit 7, receiving the amplifying unit and engaging inside the portion of the antenna which includes one of the Fresnel lens.
Now the invention will be disclosed furthermore in reference to an embodiment and annexed figures, in the figures:

Fig. 1:: a plan view of the amplifying unit, a) showing the upper part; b) showing the side part:
Fig. 2:: a perspective view showing the amplifying unit in fig. 1;
Fig. 3:: a perspective view showing the support unit;
Fig. 4:: it shows the coupling between the amplifying unit and the support unit in an open state;
Fig. 5:: it shows the device in an assembled state with a double horn including two Fresnel lens radar antenna.

Referring to fig. 1, the amplifying unit 1 comprises two symmetrical bases 2, only one of them is showed in fig. 1a) for clarity, and two sides 3, also symmetric, only one of them is showed in fig. 1 for clarity.
As it can be seen in fig. 1, the symmetrical bases 2 form two opposite faces of the pyramidal-trunk shaped amplifying unit, with rectangular base, and the symmetric sides 3 form opposite side faces of the amplifying unit 1. The symmetrical bases 2 and the symmetric sides 3 are assembled to each other in order to form the pyramidal-trunk shaped amplifying unit 1 with rectangular base by means of a set of notches 4 and grooves 4', which are disposed in the bases 2 and sides 3 edges correspondingly. This makes possible an easy assembly for the amplifying unit without needing a tool.
Referring now to Fig. 1a) and 2, the shape of the symmetrical bases 2 is essentially isosceles trapeze, wherein the inner obtuse angles are 100 degrees, and wherein a tapered central and annular edge is disposed in relation to the minor base 5 of the trapeze. This tapered edge forms a convex perimeter 6 whose chord at the level of the minor base is significantly lower than such minor base 5 length.
The symmetric sides 3 are isosceles trapeze shaped too, with an acute inner angle of 80 degrees, as can be seen in Fig. 1b).
The amplifying unit 1 becomes the pyramidal-trunk shape when it is assembled, and its dimensions are adapted to the bandwidth correspondingly to the radar antenna, as it is well-known in technics.
Regarding to fig. 3, the support unit 7 is comprised by a hollow straight-sided parallelepiped with one of the faces open, being the faces sized accordingly to the radar antenna to house partially. As showed in the figure, the face located opposite to the open face of the support unit 7 includes a gap or window 8 which defines a light path for two Fresnel lens in the antenna to be housed in the support unit 7. The gap 8 is sized correspondingly to the size of such lens. The other faces (fig. 4) are one-part and do not include gaps, and they form adequate caps 9 for the support unit 7. These caps cover the Fresnel lens and a section of the amplifying unit 1, and they are operable to have an access to the radar antenna.
As in fig. 4, the amplifying unit 1 is disposed in assembly to the gap 8 at about the convex zone of the support unit 2 in correspondence to one of the Fresnel lens in the antenna, and the other zones are oriented to the external environment.
In this embodiment the support unit is designed as having a parallelepiped shape, but it could be designed as having another different configuration, with the proviso that the area corresponding to the Fresnel lens engagement keeps the above disclosed form and be sized to house the cited components.

Claims

An amplifying device for radar antennas specially adapted for M3 double horn antenna topology including Fresnel lens, which is comprised of a first hollow amplifying unit 1 which is pyramidal-trunk shape and a second support unit 7, wherein the amplifying unit 1 is assembled by means of a form-fitted coupling, characterized in that symmetrical bases 2 which form two opposite faces of the pyramidal-trunk shaped amplifying unit 1 are essentially isosceles trapezes, wherein the inner obtuse angles are 100 degrees, and wherein a tapered central and annular edge is disposed in relation to the minor base 5 of the trapeze forming a convex perimeter 6 whose chord at the level of the minor base is significantly lower than such minor base 5 length.
An amplifying device according to claim 1, wherein the symmetric sides 3 of the pyramidal-trunk shaped amplifying unit 1 are isosceles trapeze shaped, with an acute inner angle of 80 degrees.
An amplifying device according to claims 1 and 2, wherein the symmetrical bases 2 forming two opposite faces of the pyramidal-trunk shaped amplifying unit 1, with rectangular base, and the symmetric sides 3 forming opposite side faces of the amplifying unit 1 are assembled to each other in order by means of a set of notches 4 and grooves 4', which are disposed in the bases 2 and sides 3 edges correspondingly.
An amplifying device according to claim 1, wherein the support unit 7 is comprised by a hollow straight-sided parallelepiped with one of the faces open, being the faces sized accordingly to the radar antenna to house partially, the face located opposite to the open face of the support unit 7 including a gap or window 8 which defines a light path for two Fresnel lens in the antenna and being the gap 8 sized correspondingly to the size of such lens.
An amplifying device according to any prior claims, wherein the amplifying unit 1 is disposed in assembly to the gap 8 at about the convex zone of the support unit 2 in correspondence to one of the Fresnel lens in the antenna, and the other zones are oriented to the external environment.
An amplifying device according to claim 4, wherein the other faces of the support unit 7 are one-part and do not include gaps, forming adequate caps 9 for the support unit 7 and covering the Fresnel lens of the radar antenna and a section of the amplifying unit 1, being operable to have an access to the radar antenna.