DE1050398B - Antenna constructed from a plurality of whole wave dipoles - Google Patents

Description

LEGEND 1050 398

S 54746 VIII a / 21a ⁴

REGISTRATION DAY: August 14th 1 9 5 7

NOTICE
THE REGISTRATION
AND ISSUE OF THE
EDITORIAL: 1 2 FEB RUARY 1 95 9

TV transmitter antennas are, among other things because of the required good broadband, in generally constructed from a plurality of full-wave dipoles. It is known to have these dipoles in Groups together and each group of dipoles (two, four, eight dipoles) constructive and structurally to form a unit that can be used as a component and is often referred to by the name "unit field". From such "unit fields" can (according to the "modular principle") antennas with the most varied radiation characteristics can be formed that a number of such "unit fields" in a certain position to each other attached to a supporting mast. Since the television antennas generally have horizontal polarization work and since the "unit fields" consisting of full-wave dipole half-widths (in the E-plane) of about 26 to 30 °, the result is a good omnidirectional radiation pattern if four "unit fields" in a suitable position opposite one another in a horizontal plane. lateral distance (about one wavelength) can be assigned squarely around a load-bearing mast.

When using square lattice masts, omnidirectional antennas are used for the TV band I edge lengths of about 5 m, for TV band III of about 1.2 m and antennas for TV band IV edge lengths of about 0.6 m, but with an edge length of 0.6 m the inner dimensions of the supporting mast are so small that - taking into account the inside of the mast Feeder cables, distributors, etc. - an ascent of the mast is very difficult.

With the antenna technology used up to now using so-called "unit fields" The antenna and antenna carrier are always separate components. To this separation of antenna and antenna carrier one is led with antennas for TV bands I and III for the reason, because the construction of the support mast also depends on whether and which others Antennas for other services can be plugged onto it.

In contrast, antennas for TV band IV behave in such a way that with multiple equipment of a load-bearing mast always use the Band IV antenna as the top antenna, attached to the load-bearing mast will.

The invention is based on the task of the supporting mast ζ. B. to simplify and cheaper for a band W antenna and at the same time facilitate the (inner) climbing of the mast. The invention achieves this with one of a plurality of full-wave dipoles! constructed antenna in which the dipoles are divided into (e.g. similar) groups of dipoles from a plurality of
Antenna constructed with whole wave dipoles

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Witteisbacherplatz 2

Dipl.-Ing. Helmut Laub, Munich,
has been named as the inventor

are divided so that each dipole group with a reflector wall, on which the dipoles through about im Tension nodes attacking metallic brackets are attached to a constructive and structural Unit (unit field) is summarized in that the reflector walls, for. B. by screwing or welding, are connected to one another in such a way that a supporting mast or part of it is formed.

The inventive concept can be z. B. realize that the reflector walls are made of sheet metal, which are provided with stiffeners and that by mechanical connection of parts of the stiffeners several reflector walls a supporting mast or part of the same is formed. the The reflector wall can also be designed as a trough, the walls of which are used for mechanical connection other (similar) reflector walls are suitable.

It is also possible to use rods or a sheet metal surface in the shape of a circle or a circular arc as reflector walls Shape to use, so that a supporting mast or part by lining up reflector walls the same arises.

In a further development of the invention, the dipole fields are counteracted by an insulating sheath Protected from the elements. It is advantageous to design the reflector walls of the dipole groups ("unit fields") in such a way that, on the one hand, they form the insulating Wear shell and on the other hand to stiffen the dipole fields and to connect the Reflector walls are suitable.

Further details of the invention can be found in the exemplary embodiments shown in FIGS evident.

«09 74c.267

Claims (6)

Fig. 1 shows in cross section; a cfie'Antenne tra, - · .. going mast, which is formed by the fact that the four z. B. formed from sheet metal reflector walls 1, 2, 3, 4, the four. "Standard fields" belong, are mechanically connected to one another by screwing. Reinforcements can expediently be provided on the reflector walls made of sheet metal. This stiffening can be made in such a way that "it" simultaneously enables the mechanical connection to the neighboring reflector walls by screwing or welding. It is also possible, however, to make the reflector walls from rods. The four "unit fields" shown in FIG. Reflector walls consisting of tubular rods 5, 6, 7, 8, 9, etc. In the case shown in Fig ) welded, so that a load-bearing mast or a part of it is created by stringing together four such "unit fields" and screwing the angle beams on top of each other. (In order not to jeopardize the clarity of the drawing, only the dipole attached to rod 5 is shown) As a further example of the invention, FIG. 3 shows the stringing together of four "unit fields", in which the trough-shaped reflector formed from sheet metal or walls 12, 13, 14 and 15 are formed so that the rear parts of the four reflector walls together result in a circular mast cross-section, that also the side walls of the trough-shaped reflector walls can be easily connected to the respective neighboring reflector walls, for example by screwing, and that the tub edges are designed in this way (e.g. B. with a groove) that dielectric covers 16, 17, 18 and 19 can be held thereby. Another implementation of the idea on which the invention is based is shown in FIG. The dipole groups, which each consist of four full-wave dipoles (e.g. 25, 26, 27 and 28), are arranged on reflectors, which in this case consist of tubes bent in a circle (e.g. 29, 30, 31 etc.) . These circular reflectors are connected to one another by welded-on spacers (e.g. 32, 33, etc.) so that a round, lattice-like mast is created. In these figures, too, only some of the dipoles have been drawn in, in order to maintain clarity. The invention is not limited to the construction of omnidirectional antennas from "unit fields", but also provides the possibility of constructing antennas with preferred radiation directions. Patent claims: 1. Antenna constructed from a plurality of full-wave dipoles, in which the dipoles are in (e.g. similar) groups of dipoles are subdivided, that each dipole group with a reflector wall on which fixes the dipoles by means of metal brackets that attack the voltage node are combined into a constructive and structural unit ("unit field"), thereby characterized in that the reflector walls, e.g. B. by screwing or welding, so are interconnected so that a supporting mast or a part thereof is formed. 2. Antenna according to claim 1, characterized in that the reflector walls consist of metal sheets, which are provided with stiffeners, and that by mechanical connection of parts the stiffeners of several reflector walls formed a load-bearing mast or part of the same will. 3. Antenna according to claim 1, characterized in that the reflector walls are designed as troughs whose walls are suitable for the mechanical connection of other unit fields. 4. Antenna according to claim 1, characterized in that rods or a reflector wall Sheet metal wall in circular shape or circular arc shape are used. 5. Antenna according to claim 1, characterized in that the dipole fields by an insulating Shell are protected against the effects of the weather. 6. Antenna according to claim 5, characterized in that the dielectric shell of the stiffeners or the edge of the reflector wall. Considered publications:
German patent specification No. 957 239. 1 sheet of drawings © 809 749/267 2.