CN204407486U - Long wave navigation antenna in wide-band high gain - Google Patents

Abstract

The utility model relates to a wide-band high-gain medium and long-wave navigation antenna, which belongs to the technical field of communication equipment manufacturing for aircraft navigation. Its main technical feature is that the emitter is composed of an outer emitter, a conical top perpendicular to the outer emitter, and an inner emitter. The upper end of the inner emitter is equipped with an inductance coil, and the upper end of the inductance coil is electrically connected to the outer emitter. , the outer emitter is electrically connected to the top of the cone, and the lower end of the inner emitter is electrically connected to the navigator through a copper tube. A high-frequency insulator is installed between the outer emitter and the support tube. The utility model is simple in structure, low in height, low in manufacturing cost, long in service life, small in floor area, convenient in erection and maintenance, and the performance parameters of electrical appliances meet the requirements of medium and long wave navigation antennas after the experiment.

Description

Broadband High Gain Medium and Long Wave Navigation Antenna

technical field

The utility model relates to a medium-long wave antenna, in particular to a wide-band high-gain medium-long wave navigation antenna, which belongs to the technical field of communication equipment manufacturing for aircraft navigation.

Background technique

At present, the height of the T-shaped antenna used for medium and long-wave navigation is between 10 meters and 30 meters, and the span between the two towers supporting the antenna is about 40 meters to 70 meters. The included angle is considered to be 30°, plus the span of the cable is between 6m and 17m, the length of the entire antenna area is 52m to 104m, and a radius of 10m to 30m should be laid at the lower end of the vertical radiator. 120 ground wires. Bury a large area of ground grids at the bottom of the antenna, the shape of the ground grids is radial, with the mast as the center, one every 3°, and the length is equal to the height of the radiator. Based on the above, the medium and long wave T-shaped antenna covers an area of 520 square meters to 3120 square meters. Therefore, to erect a pair of medium and long-wave T-shaped antennas, it is necessary not only to erect towers supporting the antenna, horizontal radiators, and vertical radiators, but also to lay buried nets, and in order to resist wind and ensure safety, the antenna support column must be attached with anchor wires. Increasing its wind resistance will result in not only a large footprint, but also difficulty in erection and a long project period, which virtually increases the cost of antenna erection.

The traditional medium and long-wave T-shaped navigation antenna has many defects such as complex structure, large floor area, difficult maintenance, many additional anchor lines, poor safety performance, and large capital investment. People urgently need to develop a simple structure, reliable and stable antenna in use. , Antenna with a small footprint. Moreover, it has a new medium and long wave navigation antenna that is the same as or better than the traditional medium and long wave T-shaped navigation antenna.

Utility model content

The purpose of this utility model is to solve the problem that the traditional medium and long-wave T-type navigation antenna has complex structure, high manufacturing cost, inconvenient maintenance, many anchor lines, large floor area, long erection period, large input impedance of the antenna, and the antenna A new technical solution is proposed to solve problems such as narrow bandwidth.

In order to achieve the above object, the utility model can be realized through the following technical solutions:

Broad-band high-gain mid-to-long wave navigation antenna, which is composed of antenna tower base, high-frequency insulator, emitter and navigation device. The emitter is composed of an outer emitter, a conical top perpendicular to the outer emitter, and an inner emitter. It is electrically connected with the inductance coil. An outer emitter is arranged on the upper end of the support tube, and a high-frequency insulator is installed between the outer emitter and the support tube; an inner emitter is arranged in the support tube, and the upper end of the inner emitter is connected to the inductance coil. Electrically connected, the upper end of the inductance coil is electrically connected to the outer emitter through a conductor, and the upper end of the outer emitter is electrically connected to the cone top; the lower end of the inner emitter is electrically connected to the navigation machine through a copper tube.

The outer emitter is a tubular structure, the diameter of the outer emitter is φ159mm-φ1600mm; the height of the outer emitter is 5m-24m.

The shape of the cone top is an inverted polygonal pyramid frame structure, the cone angle of the cone top is between 70°-120°, and the length of the hypotenuse of the cone is 1.5-3 meters.

The shape of the inner emitter is cylindrical, the height of the inner emitter is 2 meters to 4 meters, and the diameter of the cylinder is φ19 mm to φ159 mm.

The shape of the inductance coil is helical, and the inductance coil is installed between the inner emitter and the outer emitter.

Compared with the existing technology, the utility model has the following innovations: 1. Simple structure and long service life; 2. Small footprint, convenient erection and maintenance, and low manufacturing cost; The body structure and the structural form of the inductance coil added to the upper part of the inner emitter increase the radiation resistance of the antenna, reduce the reactance component, reduce the change rate of the input impedance of the antenna, and improve the bandwidth and radiation efficiency of the antenna. The experiment proves that the utility model can fully meet the requirements of medium and long wave band navigation in terms of various technical indicators. In terms of height, the height of the antenna is reduced from 10 meters to 30 meters to 7 meters to 28 meters, and the occupied area is reduced from 520 square meters to 3120 square meters to 154 square meters to 2461 square meters.

Description of drawings

Accompanying drawing 1 is the overall structure schematic diagram of a kind of embodiment of the utility model;

Accompanying drawing 2 is the three-dimensional structural representation of cone top 7 in accompanying drawing 1 of the utility model;

Accompanying drawing 3 is the top view structure diagram of the conical top 7 in accompanying drawing 1 of the utility model.

Detailed ways

The utility model is described in further detail with specific embodiment now in conjunction with accompanying drawing:

A wide-band high-gain mid-to-long wave navigation antenna is composed of an antenna tower base 1, a high-frequency insulator 5, a emitter and a navigation machine 2. The emitter is composed of an outer emitter 6 , a conical top 7 perpendicular to the outer emitter 6 , an inner emitter 3 and an inductance coil 4 . The inner projectile body 3 is arranged in the center of the support tube, the outer projectile body 6 is arranged at the upper end of the support pipe, and the cone top 7 is arranged at the upper end of the outer projectile body 6 . The upper end of the inner emitter 3 is connected to the inductance coil 4, the upper end of the inductance coil 4 is connected to the lower end of the outer emitter 6 through a conductor, the upper end of the outer emitter 6 is electrically connected to the cone top 7, and the lower end of the inner emitter 3 is passed through The copper pipe is electrically connected to the navigator in 2 phases. A high-frequency insulator 5 is provided between the outer emitter 6 and the support tube, which can function to isolate signals. The support tube is fixed on the tower base 1 of the antenna body and connected to the ground wire.

The outer emitter 6 is in the shape of a circular tube, and the diameter of the outer emitter 6 is 0.377 meters. Outer projectile 6 height is 23.5 meters. Outer emitter 6 is connected by No. 20 seamless steel pipe welded flange with high-strength hot-dip galvanized bolts, and the height of 23.5 meters is connected by 4 sections. The shape of the cone top 7 is an inverted hexagonal pyramid frame structure, the cone angle of the cone top 7 is 90°, and the length of the hypotenuse of the cone top 7 is 3 meters. The main material is 304 stainless steel pipe, and the hot-dip galvanized connecting piece made of steel plate is connected with stainless steel bolts. The cone top 7 is installed on the upper end of the outer projecting body 6 . The inner emitter 3 adopts a hot-dip galvanized round pipe with a diameter of φ28 and a total length of 4 meters. It is formed by connecting two 2-meter steel pipes with steel flanges welded at both ends through hot-dip galvanized bolts. The upper end of the inner emitter 3 is electrically connected with the lower end of the inductance coil 4 with a hot-dip galvanized bolt, and the upper end of the inductance coil 4 is electrically connected with the outer emitter 6 with a hot-dip galvanized bolt. The inductance coil 4 is made of a 2.5*10 red copper strip. The lower end of the inner emitter 3 is electrically connected with the navigator 2 through a copper pipe. A high-frequency insulator 5 is installed between the outer emitter 6 and the support tube in the first section below. The high-frequency insulator 5 is made of high-strength fiberglass with a diameter of 0.377 meters. Hot-dip galvanized bolts are installed between the first section of the outer projectile 6 and the support pipe. The outer projecting body 6 also plays a role in supporting the cone top 7 .

Working principle: The high-frequency signal input from the navigator 2 is connected to the lower end of the inner emitter 3 of the antenna through a copper tube, and radiates outward through the inductance coil 4, the outer emitter 6, the cone top 7 and the inner emitter 3. The cone top 7, the inductance coil 4 and the inner emitter 3 improve the electrical parameters of the antenna. The height of the antenna is less than 28 meters, which is suitable for the working requirements of the mid- and long-band navigation aircraft.

Claims (5)

1. long wave navigation antenna in wide-band high gain, it is made up of antenna body column foot (1), high frequency insulator (5), emitter and guiding aircraft (2), it is characterized in that emitter is made up of outer emitter (6) and being electrically connected with the mutually perpendicular conical surface top (7) of outer emitter (6) and inner emission (3) and inductance coil (4), be provided with outer emitter (6) in stay pipe upper end, between emitter (6) and stay pipe, high frequency insulator (5) be installed outside; Inner emission (3) is provided with in stay pipe, upper end and the inductance coil (4) of inner emission (3) are electrically connected to each other, the upper end of inductance coil (4) is electrically connected to each other by conductor and outer emitter (6), and upper end and conical surface top (7) of outer emitter (6) are electrically connected; The lower end of inner emission (3) is electrically connected by copper pipe and guiding aircraft (2).

2. long wave navigation antenna in wide-band high gain according to claim 1, is characterized in that outer emitter (6) is tubular-shaped structures, and outer emitter (6) diameter is φ 159 millimeters of-φ 1600 millimeters; Outer emitter (6) is highly 5 meters-24 meters.

3. long wave navigation antenna in wide-band high gain according to claim 1, it is characterized in that conical surface top (7) shape is inverted polygonal pyramid body frame structure, the cone angle on conical surface top (7) is between 70 °-120 °, and the hypotenuse of cone is long is 1.5-3 rice.

4. long wave navigation antenna in wide-band high gain according to claim 1, it is characterized in that the shape of inner emission (3) is cylindrical, the height of inner emission (3) is 2 meters--4 meters, the diameter of cylinder is φ 19 millimeters of-φ 159 millimeters.

5. long wave navigation antenna in wide-band high gain according to claim 1, it is characterized in that the shape of inductance coil (4) is zigzag shape, inductance coil (4) is arranged between inner emission (3) and outer emitter (6).