CN220368134U - Portable folding antenna boom - Google Patents

Abstract

The utility model discloses a portable folding antenna bracket, which comprises a first-stage central rod and a second-stage central rod, wherein the outer sides of the first-stage central rod and the second-stage central rod are provided with a first-stage spiral supporting rod and a second-stage spiral supporting rod, and spiral lines are arranged on the first-stage spiral supporting rod and the second-stage spiral supporting rod; the secondary central rod can be retracted into the primary central rod after the pull ring type indexing pin is pulled out, and the secondary spiral supporting rod plays a role in fixing a spiral line and can be quickly buckled on the spiral line; under the condition of single operation, the unfolding or folding operation is completed within 90 seconds, so that the portable and miniaturized device is realized.

Description

Portable folding antenna boom

Technical Field

The utility model particularly relates to the technical field of antenna supports, in particular to a portable and portable folding antenna support.

Background

A helical antenna (helical antenna) is an antenna having a helical shape. The coaxial cable consists of a metal spiral line with good conductivity, and is usually fed by a coaxial cable, the core line of the coaxial cable is connected with one end of the spiral line, and the outer conductor of the coaxial cable is connected with a grounded metal net (or plate). The radiation direction of the helical antenna is related to the circumference of the helical line. When the circumference of the spiral is much smaller than one wavelength, the direction of the strongest radiation is perpendicular to the spiral axis; when the circumference of the spiral is of the order of one wavelength, the strongest radiation occurs in the direction of the spiral axis.

The support of current helical antenna is fixed, very portable when using, and current helical antenna impedance match is relatively poor, and the operating frequency band is narrower, can't satisfy broadband equipment's demand.

Disclosure of Invention

The utility model aims to provide a portable and portable folding antenna bracket, which solves the problems that the existing bracket of a spiral antenna is fixed, is very inconvenient to carry when in use, has poor impedance matching, has a narrow working frequency range and cannot meet the requirement of broadband equipment.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the portable folding antenna bracket comprises a primary central rod and a secondary central rod, wherein a plurality of primary spiral supporting rods and secondary spiral supporting rods are respectively arranged outside the primary central rod and the secondary central rod, and spiral lines are arranged on the primary spiral supporting rods and the secondary spiral supporting rods;

the primary central rod and the secondary central rod are connected through a central rod limiting piece.

As a further technical scheme of the utility model, the primary central rod is arranged in a cylinder shape, the outer diameter of the secondary central rod is the same as the inner diameter of the primary central rod, and the secondary central rod is connected in the primary central rod in a sliding manner.

As a further technical scheme of the utility model, the secondary spiral supporting rod and the primary spiral supporting rod are spirally arranged outside the secondary central rod and the primary central rod from top to bottom by taking the axes of the primary central rod and the secondary central rod as the reference.

As a further technical scheme of the utility model, the central rod limiting piece is arranged in a ring shape and sleeved on the outer side of the top of the primary central rod, the contact width between the top of the primary central rod and the central rod limiting piece is 1/2 of the integral height of the central rod limiting piece, and the outer side of the central rod limiting piece is in threaded connection with a pull ring type indexing pin.

As a further technical scheme of the utility model, the bottom of the primary central rod is welded with a fixed flange.

As a further technical scheme of the utility model, the spiral line is connected with the debugging piece in series and then connected with the radio frequency device.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the first-stage central rod is hollow, the second-stage central rod is slidably connected in the first-stage central rod, the heights of the second-stage central rod and the first-stage central rod can be relatively adjusted, and the diameter of the spiral coil can be changed to realize a normal mode or an axial mode when the relative heights of the second-stage central rod and the first-stage central rod are adjusted, so that the width of an antenna frequency band is increased;

2. the input impedance of the spiral antenna is about 120 ohms and is not 50 ohms, impedance mismatch is caused if the spiral antenna is directly connected with a connector, and the working frequency band of the antenna is near 300MHz, the wavelength is close to 1000mm, and a longer impedance conversion line brings additional transmission loss and economic cost, so that a tuning piece is arranged at the lower end of the spiral line, and the impedance of the antenna is matched through the tuning piece, so that good matching is obtained;

3. according to the utility model, the center rod is fixedly arranged at the middle position of the top of the fixed base 1, the secondary center rod can be retracted into the primary center rod after the pull ring type indexing pin is pulled out, and the secondary spiral supporting rod plays a role in fixing a spiral line and can be quickly buckled on the spiral line; under the condition of single operation, the antenna completes the unfolding or folding operation within 90 seconds, thereby realizing portability and miniaturization.

Drawings

Fig. 1 is a schematic view of the utility model in its unfolded state configuration.

Fig. 2 is a front view of fig. 1 in the present utility model.

Fig. 3 is a schematic view of the contracted state structure of the present utility model.

Fig. 4 is a front view of fig. 3 in the present utility model.

Fig. 5 is an enlarged schematic view of fig. 3 at a in the present utility model.

In the figure: the device comprises a 1-fixed flange, a 2-primary central rod, a 3-primary spiral supporting rod, a 4-secondary central rod, a 5-secondary spiral supporting rod, a 6-spiral line, a 7-central rod limiting piece, an 8-pull ring type indexing pin, a 9-tuning piece and a 10-radio frequency device.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, in an embodiment of the present utility model, a portable and portable folding antenna stand includes a primary central rod 2 and a secondary central rod 4, wherein a plurality of primary spiral supporting rods 3 and secondary spiral supporting rods 5 are respectively disposed outside the primary central rod 2 and the secondary central rod 4, and spiral lines 6 are disposed on the primary spiral supporting rods 3 and the secondary spiral supporting rods 5;

the primary central rod 2 and the secondary central rod 4 are connected through a central rod limiting piece 7.

In this embodiment, the primary central rod 2 is cylindrical, the outer diameter of the secondary central rod 4 is the same as the inner diameter of the primary central rod 2, and the secondary central rod 4 is slidably connected in the primary central rod 2.

Through adopting above-mentioned technical scheme, the one-level center pole 2 sets up to hollow, and second grade center pole 4 sliding connection is in one-level center pole 2, and the height of second grade center pole 4 and one-level center pole 2 can be adjusted relatively, can change the diameter of 6 coils of helix and realize normal mode or axial mode when adjusting second grade center pole 4 and one-level center pole 2 relative height to increase the width of antenna frequency channel.

In this embodiment, the secondary spiral supporting rod 5 and the primary spiral supporting rod 3 are spirally arranged outside the secondary central rod 4 and the primary central rod 2 from top to bottom based on the axes of the primary central rod 2 and the secondary central rod 4.

In this embodiment, the central rod limiting member 7 is provided in a ring shape and is sleeved on the outer side of the top of the primary central rod 2, the contact width between the top of the primary central rod 2 and the central rod limiting member 7 is 1/2 of the overall height of the central rod limiting member 7, and the outer side of the central rod limiting member 7 is in threaded connection with a pull ring type indexing pin 8.

By adopting the technical scheme, the center rod is fixedly arranged at the middle position of the top of the fixed base 1, the secondary center rod 6 can be retracted into the primary center rod 3 after the pull ring type indexing pin is pulled out, and the secondary spiral supporting rod 7 plays a role in fixing the spiral line 5 and can be quickly buckled on the spiral line 5; under the condition of single operation, the antenna completes the unfolding or folding operation within 90 seconds, thereby realizing portability and miniaturization.

In the embodiment, a fixed flange plate 1 is welded at the bottom of the primary central rod 2; the spiral line 6 is connected with the debugging sheet 9 in series and then connected with the radio frequency device 10.

By adopting the technical scheme, because the input impedance of the spiral antenna is about 120 ohms and is not 50 ohms, if the input impedance is directly connected with the connector, impedance mismatch can occur, and the working frequency band of the antenna is near 300MHz, the wavelength is close to 1000mm, and a longer impedance conversion line can bring additional transmission loss and economic cost, so that the lower end of the spiral line 6 is provided with the tuning piece 9, and the impedance of the antenna is matched through the tuning piece 9, so that the antenna is well matched.

The working principle of the utility model is as follows: because the input impedance of the spiral antenna is about 120 ohms and is not 50 ohms, if the spiral antenna is directly connected with a connector, impedance mismatch occurs, and the working frequency band of the spiral antenna is near 300MHz, the wavelength is close to 1000mm, and a longer impedance conversion line brings additional transmission loss and economic cost, so that the lower end of the spiral line 6 is provided with a tuning piece 9, and the impedance of the antenna is matched through the tuning piece 9, so that good matching is achieved;

when the antenna is used, as the primary central rod 2 is arranged as a hollow type, the secondary central rod 4 is connected in the primary central rod 2 in a sliding way, the heights of the secondary central rod 4 and the primary central rod 2 can be relatively adjusted, and the diameter of the coil of the spiral line 6 can be changed to realize a normal mode or an axial mode when the relative heights of the secondary central rod 4 and the primary central rod 2 are adjusted, so that the width of the antenna frequency band is increased;

further, a center rod is fixedly arranged at the middle position of the top of the fixed base 1, the secondary center rod 6 can be retracted into the primary center rod 3 after the pull ring type indexing pin is pulled out, and the secondary spiral supporting rod 7 plays a role of fixing the spiral line 5 and can be quickly buckled on the spiral line 5; under the condition of single operation, the antenna completes the unfolding or folding operation within 90 seconds, thereby realizing portability and miniaturization.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. A portable, folding antenna mount, characterized by: the novel spiral support device comprises a primary central rod (2) and a secondary central rod (4), wherein a plurality of primary spiral support rods (3) and secondary spiral support rods (5) are respectively arranged outside the primary central rod (2) and the secondary central rod (4), and spiral lines (6) are arranged on the primary spiral support rods (3) and the secondary spiral support rods (5);

the primary central rod (2) and the secondary central rod (4) are connected through a central rod limiting piece (7).

2. The portable, foldable antenna stand of claim 1, wherein: the primary central rod (2) is arranged in a cylinder shape, the outer diameter of the secondary central rod (4) is the same as the inner diameter of the primary central rod (2), and the secondary central rod (4) is slidably connected in the primary central rod (2).

3. The portable, foldable antenna stand of claim 1, wherein: the secondary spiral supporting rod (5) and the primary spiral supporting rod (3) are spirally arranged outside the secondary central rod (4) and the primary central rod (2) from top to bottom by taking the axes of the primary central rod (2) and the secondary central rod (4) as references.

4. A portable, foldable antenna stand according to claim 3, characterized in that: the center rod limiting part (7) is arranged in a circular ring shape and is sleeved on the outer side of the top of the primary center rod (2), the contact width between the top end of the primary center rod (2) and the center rod limiting part (7) is 1/2 of the integral height of the center rod limiting part (7), and the outer side of the center rod limiting part (7) is in threaded connection with a pull ring type indexing pin (8).

5. The portable, foldable antenna stand of claim 4, wherein: the bottom of the primary central rod (2) is welded with a fixed flange plate (1).

6. The portable, foldable antenna stand of claim 5, wherein: the spiral line (6) is connected with the debugging piece (9) in series and then connected with the radio frequency device (10).