RU2293407C1 - Mobile wide-band mast antenna - Google Patents

Abstract

FIELD: radio engineering; antennas for mobile high-frequency radio transceiving systems.

SUBSTANCE: proposed antenna has supporting plate mechanically joined with antenna mast and antenna operating curtains made of antenna strand and disposed along lines of two straight different-height cones joined through their bases. Top and bottom ends of antenna operating curtains are mechanically joined to top and base of mast; bend points of operating curtains are geometrically disposed on circumference of bases of two straight different-height cones; top and bottom ends of operating curtains are electrically interconnected through top and bottom slip-rings, respectively; bottom slip-ring functions as first feed point of antenna whose second feed point is formed by electrically interconnected ends of counterpoises uniformly disposed along antenna. Mast is supported in vertical position by means of dielectric guy ropes incorporating adjustment strips and clasps. Collapsible antenna mast has tubular metal base and elbows in the form of dielectric pipes mechanically joined together by means of metal inserts. Bottom elbow is built integral with base installed on antenna supporting plate. Antenna is placed in stowed position by separating mast elbows and their stowing in packet wherein antenna operating curtains are secured by means of clips and hooks and counterpoises are wound on base clips.

EFFECT: reduced closing-down and setting-up time at optimal electrical characteristics which is essential for arranging antenna fields.

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Description

The invention relates to radio engineering, in particular to antenna technology, and is intended for mobile (mobile) transceiver radio complexes of the decameter frequency range.

Antennas for mobile transceiver radio complexes are known that provide sufficiently high strength (wind resistance, the number of deployment-coagulation cycles before decommissioning, etc.) characteristics: “10 m pin” ([1], p. 79), “Z-shaped” ( [1], p. 86, 87), "oblique beam" ([1], p. 85).

However, these antennas have not good enough electrical parameters, such as:

- a very narrow frequency range Δf, in which the antenna keeps its parameters constant: Δf = (0.005 ... 0.01), where Δf _p is the operating frequency;

- a very low value of the gain (KU) in the range of operating frequencies KU = (0.3 ... 0.05) [1];

- a significant range of changes in the active and reactive components of the input resistance:

- for the antenna “pin 10 m” - Ra = (2.0-1000) Ohm, Xa = (minus 2000 ... plus 200) Ohm;

- for "Z-shaped" antennas - Ra = (10-90) Ohm, Xa = (minus 1200 ... minus 50) Ohm;

- for the antenna "oblique beam" - Ra = (30-3000) Ohm, Xa = (plus 1400 ... minus 2400) Ohm,

which leads to the need to use expensive and complex antenna matching devices in which accurate measurement of the characteristics and matching of the antenna is ensured with a significant increase in tuning time [2].

The closest in essence to the invention is a whip range mobile antenna, comprising an antenna base mechanically connected to an antenna mast of height h and a mast elevator through a support insulator. N antenna working canvases made of antenna cord are placed along the lines of two straight, different-height cones conjugated by their bases, the upper and lower ends of the N working antenna canvases are electrically connected by the upper and lower collective rings, respectively, while the lower collective ring is the first antenna feed point, and the second antenna power point is the electrically integrated ends of the counterweights evenly spaced around the antenna. The mast in an upright position is held by guy wires from a steel cable, sectioned by insulators, ending with an adjusting laglin. The antenna mast is detachable and consisting of M elbows, while the mast elbow is made in the form of a metal pipe and a dielectric tip with a groove providing mechanical connection of the mast elbows to each other, electrically isolating one mast elbow from the other, counterweights are placed evenly around the antenna base [3] .

The disadvantage of this antenna is the need for deployment and mounting of antenna canvases and balances to the antenna when mounted at the facility and deployment using a lift, which significantly increases the time and complexity of deploying and rolling up the antenna.

The problem to which the invention is directed, is to reduce the time and complexity of deployment-coagulation of the antenna while maintaining optimal electrical parameters.

To solve this problem, we propose an antenna containing the base of the antenna, a mast consisting of knees, working antenna webs made of an antenna cord and placed along the lines of two straight different-height cones conjugated by their bases, the upper and lower ends of the antenna working blades are mechanically connected to the top and base antenna masts, while the inflection points of the antenna working blades are geometrically placed on the base circumference of two straight uneven cones, the upper and lower ends of the working blades n the antennas are electrically combined by the upper and lower collective rings, respectively, while the lower collective ring is the first antenna power point, and the second antenna power point is the electrically combined ends of the counterweights evenly placed around the antenna, the mast is held upright by guy wires, the antenna mast is detachable and consisting of knees, counterweights are placed evenly around the base of the antenna. According to the invention, the mast elbows connected by metal inserts are made of dielectric material, the lower mast elbow being made integrally with the base mounted on the base plate, on which the lower collective ring is located and the counterweights are fixed, braces are made of dielectric material and end with adjusting strips and carabiners mounts. The execution of the knees of the mast of the dielectric material allowed 1.5 times to facilitate the mast. In the transport position, the mast knees are undocked and assembled in a bag, where, using the clamps and hooks, the antenna working webs are fixed, and the balances are wound on the base brackets.

A comparative analysis of the claimed solution and the prototype shows that the invention is characterized in that the mast elbows connected by metal inserts are made of dielectric material, the lower elbow being made integrally with the base mounted on the base plate, the guy wires are made of dielectric material without insulators and end with adjusting levels and fastening carbines. In the transport position, the upper knee, the upper collective ring and the lower knee are undocked and assembled in a bag, where, using clamps and hooks, the antenna working webs are fixed and counterweights are wound on the base brackets.

This allows you to reduce the time and complexity of deployment - coagulation of the antenna.

Figure 1 presents a diagram of a mast mast antenna mobile (AMDM); figure 2 - transport laying mast elements.

AMDM contains a base plate 1, counterweights 2, a mast 3 of an antenna, made detachable and containing a bend 4, guy wires 5 made of dielectric material and ending with adjustment bars 6 and carabiners 7, an arm (upper collecting ring) 8, working webs 9 of the antenna, made of an antenna cord and placed along the lines of two different-height cones conjugated by their bases. The inflection points of the working blades 9 are geometrically placed on the circumference of the bases of two straight cones of different heights. The upper and lower ends of the blades 9 are mechanically and electrically combined by the bracket 8 and the lower collective ring 10. The lower elbow 4 is rigidly connected to the base 11 mounted on the base plate 1, on which the brackets 12 for winding the counterweights are fixed 2. The bus 13 is designed for electrical connection of the balances 2. A matching device 14 connected to the lower collective ring 10 is necessary for connecting the power points to the feeder.

The lower collective ring 10 is the first antenna feed point, the second power point is the electrically connected ends of the counterweights 2, evenly spaced around the antenna. The mast 3 is held upright by guy wires 5, which are fixed to the ground with metal stakes 15. The elbow 4 connected by metal inserts are made of dielectric material, which facilitates the mast 3. The antenna is put into transport position by undocking the elbows 4 of mast 3 and fixing them and webs 9 using clamps 16 and hooks 17 and winding counterweights 2 on the brackets 12.

The antenna is installed by a calculation of three people as follows. A base plate 1 and fastening stakes 15 of guy wires 5 are installed on a pre-marked site. Then put the base 11 of the mast 3 on the axis of the base plate and assemble the mast 3 on the ground, for this you need to open the clamps 16 of the transport laying, loosen (by lowering the lower knee 4 down) and unwind the working cloths 9 of the antenna. Insert the upper knee into the middle and insert the middle into the lower, attach braces 5, close the clamps 16. Two braces 5 join the stakes 15. Then one person stands on the base 11, and the other two lift the mast 3 at the top, gradually shifting to the base 11 , pull the third guy 5 in the direction of the center of the platform and attach it to the stake 15. Align the mast with the help of straps 6 located on guy wires 5. Stretch the balances 2 and attach their carabiners 7 to the stakes 15. The power cable is connected to the matching device 14.

Literature

1. Zakharov V.P., Levchuk P.F., Muravyov Yu.K. and other characteristics of antennas for radio communications. / Ed. Yu.K. Muravyev. - L .: Ed. VKAS, 1968, p.130.

2. Luzan Yu.S., Marenko V.F., Bogdanov A.V. etc. Alignment of decameter transmitting antennas. Collection of reports of the technological congress "Modern technologies in the creation of military and civilian products." - Omsk: Publ. OmSTU, 2001, p. 280-283.

3. A.S. - RU 2226021 C2.

Claims (1)

Band mobile mast antenna, comprising an antenna base, detachable, consisting of elbows, an antenna mast, antenna working webs made of an antenna cord and placed along the generatrix lines of two straight different-height cones connected by their bases, the upper and lower ends of the antenna working blades are mechanically connected to the apex and the base of the antenna mast, while the inflection points of the antenna work blades are geometrically placed on the circumference of the bases of two straight cones of different heights, the upper and lower cones The antenna work webs are electrically combined by the upper and lower collective rings, respectively, while the lower collective ring is the first antenna feed point, and the second antenna feed point is the electrically combined ends of the counterweights evenly placed around the antenna, the mast is held upright by guy wires, characterized in that that the mast knees connected by metal inserts are made of dielectric material, which facilitates the mast, and the lower knee is made as integral with the base mounted on the base plate, guy wires are made of dielectric material without insulators and end with adjusting straps and carabiners, the mast knees in the transport position are undocked and assembled in a package where the antenna working webs are fixed with clamps and hooks and the balances are wound on the base brackets.

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