CZ304619B6 - Antenna with ribbon bundle - Google Patents

Abstract

In the present invention, there is disclosed an antenna with a ribbon bundle comprising two mirror-like situated identical parts (A, B). Each of these two parts (A, B) is formed by three layers of dielectric material, whereby radiation elements (4) are arranged on one side of the first layer (1). The second layer (2) adjoins the opposite side of the first layer (1) i.e. the side without the radiation elements (4) arranged thereon. (4). The third layer (3) is provided on its side adjoining the second layer (2) with a metal coating (5) covering the whole area and on its opposite side it is provided with electrically conducting paths (6) feeding the separate radiation elements (4). Further, the parts (A, {BETA}) are provided with holes (7) in the dielectric layers and the metal coating, and with conductors passing therethrough and feeding both the electrically conducting paths (6) and the radiation element (4). The dielectric second layer (2) thickness is greater than the thickness of the dielectric first layer (1) and third layer (3).

Description

Antenna with ribbon bundle

Technical field

The present invention relates to a ribbon beam antenna suitable for covering a ribbon network with a signal from a centrally located antenna.

BACKGROUND OF THE INVENTION

For the purposes of covering the ribbon radio network from a centrally located station, antennas with a circular diagram in the horizontal plane are known (L. Freytag, B. Jecko: Cosecant-squared patten antenna for base station at 40 GHz, 0-7803-8302-8 / 04 IEEE, 2004, pp. 2464-2467; US 6,144,344; US 6,107,964; D. Biswas, R. Vulapalli: A two-layer microstrip antenna to generate cosecant squared fan beam for monopulse tracking, Proceedings of International Microwave Conference 08, 978-1-4244-2690-4444 / 08 IEEE, 2008, pp. 89-92 JR Sanford, J.-F. Zurchter, S. Robert: Optimized Antennas for Mobile Communication Base States, IEEE Xplore, http : //www.stephan-robert.ch/attachments/File/My papers / optimized-antennas sanford.pdf), contoured antenna with front-end radiation suppression (J. Lei, G. Fu, L. Yang, D .-M. Fu: Wide band linear printed antenna array with low sidelobe cosecant squaresaped beam pattem, Profress In Electromagentics Research C, Vol. 15, 2010, pp. 233-241; US 7,605,754), or antennas formed from two Yagi antennas directed in opposite directions (e.g. TRS device antenna - communication ribbon network produced by Tesla Pardubice in 1990 - 2000). Circular diagram antennas make very inefficient use of the transmitted power for this application because they emit too much energy in the forward direction (0 °). Antennas with suppression of radiation in the forward direction partially improve the antenna's efficiency for this use, but lateral radiation (± 90 °) is insufficient due to the radiation pattern limitation. For antennas composed of two oppositely oriented Yagi antennas, the disadvantage is that the radiation of the Yagi antennas to the transverse direction is very low, so that for vehicles directly in front of the antenna the field is very weak. This usually does not matter much when it comes to long-distance communication, where good coverage of the near zone, which vehicles pass relatively quickly, is not very important. However, covering short distances (eg RFID) is very important.

There is known in the art an antenna comprising radiation elements on the side of a dielectric material layer provided on the other side with a full-area metallization on which a further layer of dielectric material is arranged with its first side and conductive paths on the other side. provided with at least one through hole for the conductor connecting the conductive paths and the radiating elements (US 5 903 239). The design of this antenna reduces costs and increases the sensitivity of the antenna.

EP 2,434,577 describes optimizing the radiation pattern of an antenna by adjusting radiation parameters such as phase shift and amplitudes.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide ribbon beam antennas comprising two mirror-like identical portions, each of which comprises three layers of dielectric material. On one side of the first layer there are radiating elements, preferably in the form of conductive pads. The second layer adjacent to the opposite side of the first layer to which the radiation elements are disposed forms a mechanical spacer of the first layer, strengthens the entire structure and adjusts the optimum field for the radiation elements. The third layer has a full-area metallization on the side adjacent to the second layer, and on the opposite side it is provided with conductive paths supplying the individual radiating elements. The second dielectric layer has a greater thickness than the first

And a third dielectric layer. The parts are further provided with openings in the dielectric layers and conductors passing through them connecting the supply conducting paths and the radiating elements.

The two parts cover the opposite polospheres of space and together cover the area of space around the boundary of these polospheres.

Preferably, the antenna is formed as a multilayer printed circuit, which significantly reduces manufacturing costs, increases reproducibility of the parameters in production, and increases the service life.

The antenna of the present invention forms a beam with a double cosecant waveform in one plane and a standard waveform in a plane perpendicular. It is suitable for coverage of ribbon network with signal from centrally placed antenna. In the horizontal plane, it has low front-end gain and high side-end gain. The antenna diagram in the horizontal plane in the shape of a double cosecant guarantees uniform signal coverage on a line passing some distance from the antenna. This type of diagram can be used, for example, to communicate with vehicles passing a base station on a straight line, such as a road or rail. Compared to standard antennas, this antenna yields higher gains over longer distances, allowing you to increase the range of the device or reduce the transmitted power.

The design of the antenna with two mirrored sections and three layers of dielectric enables efficient acquisition of a single-plane double-cosecond radiation pattern suitable for covering a ribbon network with a signal from one centrally located antenna.

BRIEF DESCRIPTION OF THE DRAWINGS

Giant. 1 schematically illustrates an antenna described in an exemplary embodiment.

Giant. 2 shows an approximate shape of the ribbon coverage diagram of the antenna.

DETAILED DESCRIPTION OF THE INVENTION

The ribbon beam antenna is shown in Fig. 1 and comprises two mirror-like identical portions A, B. These two portions A, B cover the opposite polospheres of space and together cover the area of the space around the boundary of these polospheres. Each of these two parts A, B consists of three layers of dielectric material. On one side of the first layer 1, radiating elements 4 are arranged in the form of conductive pads. The second layer 2 adjacent to the opposite side of the first layer 1 to which the radiation elements 4 are disposed forms a mechanical spacer of the first layer 1, strengthens the entire structure and adjusts the optimum field for the radiation elements 4. The third layer 3 has a side On the opposite side, it is provided with conductive paths 6 supplying the individual radiating elements 4. The connection of the supply conducting paths 6 and the radiating elements 4 is carried out by conductors passing through openings 7 in dielectric layers 1, 2, 3 and full-area metallization 5. Both parts The A, B antennas are powered by a power divider 8. The antenna emits most in the ± x direction, less in the + y direction and at least in the -y direction (Fig. 2, 10 - main beam).

Claims (3)

PATENT CLAIMS A ribbon beam antenna, comprising radiating elements arranged on the first side of a dielectric material layer provided on the other side with a full-area metallization, on which a further layer of dielectric material is arranged with its first side and conductive paths disposed on the other side thereof; the full metal plating is provided with at least one through hole for conductor connecting conductive paths and radiating elements, characterized in that the antenna comprises two mirror-like identical parts (A, B), each of which two parts (A, B) consists of three layers of dielectric material, wherein on one side of the first layer (1) radiating elements (4) are arranged, the second layer (2) adjoins the opposite side of the first layer (1) on which the radiating elements (4) are arranged, and the third layer (3) has on the side adjacent to the other v The layer (2) of the full-area metallization (5) and on the opposite side is provided with conductive paths (6) supplying the individual radiating elements (4), the part (A, B) being further provided with openings (7) in dielectric layers and metallization. conductors connecting the supply conducting paths (6) and the radiating elements (4), and wherein the second dielectric layer (2) has a greater thickness than the first dielectric layer (1) and the third dielectric layer (3). Antenna according to claim 1, characterized in that the radiating elements (4) are in the form of conductive pads. Antenna according to claim 1 or 2, characterized in that it is a multilayer printed circuit.