CN216529370U

CN216529370U - Foldable yagi antenna

Info

Publication number: CN216529370U
Application number: CN202122862649.2U
Authority: CN
Inventors: 白云飞; 崔航; 刘衍; 刘炯; 韦金生; 范学祯
Original assignee: Xian Electronic Engineering Research Institute
Current assignee: Xian Electronic Engineering Research Institute
Priority date: 2021-11-21
Filing date: 2021-11-21
Publication date: 2022-05-13
Anticipated expiration: 2031-11-21

Abstract

The utility model relates to a foldable yagi antenna, and belongs to the technical field of antennas. The antenna comprises an antenna element, an element joint, an externally-mounted connecting piece, an antenna main rod and a radio frequency interface. The antenna main rod adopts a rectangular pipe fitting, and the antenna main rod is fixedly connected through a nylon support. The antenna elements are round rod pieces, wherein each antenna main rod is provided with an antenna element which is distributed on two sides of the antenna main rods. One end of the oscillator joint is connected with the antenna main rod in a threaded connection mode, and the other end of the oscillator joint is connected with the antenna oscillator in a hinge mode to realize folding and unfolding of the antenna oscillator. The externally mounted interface member and the radio frequency interface are located on the antenna main rod. When all the antenna elements are folded, the external dimension of the antenna is minimized.

Description

Foldable yagi antenna

Technical Field

The utility model relates to the field of antennas, in particular to a foldable yagi antenna.

Background

An antenna is a transducer that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in free space or vice versa, and is a component used in a radio device for transmitting or receiving electromagnetic waves. The yagi antenna is one of the antennas, and is an end-fire antenna formed by arranging an active oscillator, a passive reflector and a plurality of passive directors in parallel. The traditional design method is that a main rod and an oscillator (a guide rod) of an antenna are rigidly connected to form a fixed geometric shape. The design method has the advantages of simple design and manufacture, and the rigid connection of the main rod and the vibrator ensures the structural strength and the conductivity between the structural components, but has the defect of larger size.

Patent No. 201620736465.8 discloses a folding yagi antenna, which includes a main rod, a first guide rod mechanism, a second guide rod mechanism, and a third guide rod mechanism, wherein the guide rod mechanism includes a guide rod assembly, a fixing base, and a hinge shaft. The guide rod in the antenna structure can be folded or unfolded in a rotating mode around the hinged shaft on the fixed seat, and the folding and unfolding states of the guide rod folding mechanism are fixed by the friction force of the rotating shaft, so that the position of the guide rod is not good in fixing performance when the guide rod is unfolded and works, and the guide rod can rotate freely along the rotating shaft easily.

202021113398.7 patent number relates to a foldable yagi antenna, which comprises a main rod and several groups of vibrator components, each group of vibrator components comprises guide rods symmetrically arranged on two sides of the main rod, each guide rod comprises a vibrator support arranged on the main rod, the tail end of each guide rod is rotatably arranged on the vibrator support, each vibrator support comprises an installation part sleeved on the main rod, two symmetrical support plates are arranged on two sides of the installation part, the two support plates are arranged in parallel at a vertical direction at intervals, a mounting groove is formed between the two support plates, the inside of each guide rod is of a hollow structure, one end of each guide rod is an opening, the other end of each guide rod is closed, a guide hole is arranged on the guide rod, a rivet respectively penetrates through the guide hole and the mounting holes of the two support plates to fix the guide rods, the mounting holes are arranged on the support plates, a return spring is arranged in each guide rod, one end of the return spring is pressed against one end of the inside of the guide rod, the other end of the rivet is tightly propped against one side of the rivet. The antenna oscillator folding mechanism realizes the position fixation of the guide rod in the unfolding state and is convenient to operate. When the mobile phone is unfolded, the guide rod rotates around the base shaft, and the bottom end of the guide rod can be pushed into the fixing hole of the main rod by the spring after the guide rod rotates to the position, so that the position of the guide rod is fixed in the unfolded state; when the folding device is folded, the guide rod rotates along the support, and the tail end of the guide rod can automatically fall off under the action of the spring to realize folding. However, the folding structure of the guide bar does not achieve the position fixation of the guide bar in the folded state, so that the guide bar may be loosely unfolded in the folded and stored state.

Patent No. 202020522938.0 is a foldable yagi antenna. The assembly comprises a main rod, the main rod is sequentially provided with at least two groups of vibrator assemblies from top to bottom, each group of vibrator assemblies comprises guide rods symmetrically arranged at two sides of the main rod, each guide rod comprises a joint assembly fixed on the main rod, the tail end of each guide rod is rotatably arranged on the joint assembly, each joint assembly comprises an L-shaped joint sleeve and a positioning buckle, two mutually perpendicular positioning grooves are arranged on the L-shaped joint sleeve, the two sides of each positioning groove are provided with a concave surface and a convex surface which are arranged on the inner wall of the L-shaped joint sleeve and matched with the guide rods, the guide rods of the utility model can be rotatably folded through the joint sleeves arranged on the main rod, the concave surface and the convex surface in the positioning groove can be matched to clamp the guide rod, the guide rod cannot be loosened up and down and is not easy to loosen and fix, meanwhile, the volume of the antenna can be reduced after the guide rod is folded, and the antenna is easier to store and transport after being folded. The oscillator folding structure can be fixed when the guide rod is unfolded and folded, but the shape of the L-shaped joint sleeve is complex, and the performance of the antenna can be influenced under special conditions. The structure enables the guide rod to be folded only at the root part, and when the length of the vibrator is large and the distance is small, the folding cannot be realized.

Disclosure of Invention

Technical problem to be solved

In order to avoid the defects of the prior art, the utility model provides a foldable yagi antenna.

Technical scheme

The utility model provides a collapsible yagi antenna, includes the antenna element, installs interface piece, antenna boom and radio frequency interface to the external, its characterized in that still includes the oscillator joint, and the one end of oscillator joint is connected with the antenna boom through the spiro union form, and the other end is connected with the antenna element through the hinge form and realizes folding and the expansion of antenna element.

The further technical scheme of the utility model is as follows: one end of the antenna oscillator is provided with a flat oscillator hinge, the tail end of the oscillator hinge is of a semi-circular structure, and the oscillator hinge is provided with a long hole.

The further technical scheme of the utility model is as follows: the antenna oscillator is further provided with a stop ring, and the diameter of the stop ring is larger than or equal to that of the sleeve.

The further technical scheme of the utility model is as follows: the number of the antenna elements is 8.

The further technical scheme of the utility model is as follows: the vibrator joint comprises a vibrator seat, a sleeve, a spring, a vibrator pin and two saddle bulges; one end of the oscillator seat is provided with a screw rod connected with the antenna main rod, the sleeve and the spring are sleeved on the oscillator seat, the saddle protrusion is provided with a hole capable of installing an oscillator pin, the oscillator hinge is located between the two saddle protrusions, and the oscillator pin penetrates into the hole of the saddle protrusion and the strip hole of the oscillator hinge 11, so that the antenna oscillator and the oscillator joint form a hinge connection mode.

The further technical scheme of the utility model is as follows: the spring adopts a cylindrical compression spring.

The further technical scheme of the utility model is as follows: the diameter of the sleeve is larger than or equal to that of the spring.

The further technical scheme of the utility model is as follows: the oscillator pin is made of stainless steel.

Advantageous effects

According to the novel foldable yagi antenna, the oscillator on the antenna can fix the position of the oscillator in a working state and can also fix the position of the oscillator in a folded state. The position of the oscillator folding hinge can be selected at any position of the oscillator according to the folding requirement of the antenna, and the oscillator is not required to be folded at the root of the oscillator. The hinged position has no redundant structure protruding part, so that the antenna performance is ensured, and the operation is convenient.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic diagram of a yagi antenna in an unfolded state;

fig. 2 is a folded external view of the yagi antenna;

FIG. 3 is a structural diagram showing the folded state of the vibrator joint;

FIG. 4 is a structural diagram showing the transducer joint in an expanded state;

FIG. 5 is a process diagram of the vibrator joint from a folded state to an unfolded state.

The antenna comprises an antenna element 1, an antenna element 2, an element joint 3, an externally-mounted interface part, an antenna main rod 4, a radio frequency interface 5, an element pin 6, an element pin 7, a sleeve 7, a spring 8, an element seat 9, a stop ring 10, an element hinge 11, a strip hole 12 and a saddle bulge 13.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The yagi antenna is one of VHF-band radio-frequency signal transmitting and receiving antennas, and the volume and the structural form of the yagi antenna are different according to the requirements of band radio-frequency signals. The yagi antenna consists of two parallel main rods and six pairs of vibrators, wherein each pair of vibrators is connected to different main rods and arranged alternately. During operation, the antenna oscillator is unfolded through the oscillator hinge in a rotating mode and is rotated to a folded state through the oscillator hinge through the spring sleeve locking position, and the antenna oscillator is retracted to a fixed position through the long hole in the oscillator hinge.

As shown in fig. 1 and 2, the foldable yagi antenna provided by the present invention is a double-layer yagi antenna, and is composed of 8

antenna elements

1, 8 element joints 2, an externally-mounted

interface component

3, 2 antenna main rods 4, and a radio frequency interface 5. Antenna mobile jib 4 adopts the rectangle pipe fitting, and 2 antenna mobile jib 4 are fixed through the nylon leg joint. The 8 antenna elements 1 are different in length, and circular rod pieces are adopted, wherein 4 antenna elements 1 are arranged on each antenna main rod 4 and distributed on two sides of each antenna main rod 4. One end of the oscillator joint 2 is connected with the antenna main rod 4 in a screw connection mode, and the other end of the oscillator joint is connected with the antenna oscillator 1 in a hinge mode. The externally mounted interface 3 and the radio frequency interface 5 are located on the antenna boom 4. When all the antenna elements 1 are folded, the external dimension of the antenna is minimized. The antenna is shown in an unfolded state in fig. 1 and in a folded state in fig. 2.

As shown in fig. 3, a flat oscillator hinge 11 is arranged at one end of the antenna oscillator 1, the tail end of the oscillator hinge 11 is of a semicircular structure, so that rotation is facilitated, a long hole 12 is arranged on the oscillator hinge 11, a stop ring 10 is further arranged on the antenna oscillator 1, the diameter of the stop ring 10 is larger than or equal to that of the sleeve 7, and when the antenna oscillator 1 is unfolded, the sleeve 7 can be stopped.

As shown in fig. 3 and 4, the oscillator joint 2 is located at the root of the antenna oscillator 1, the oscillator joint 2 is a structure that can be locked in position both in an unfolded state and a folded state, and the unfolded fixation and the folded fixation of the oscillator are realized through the oscillator joint 2. Comprises a vibrator seat 9, a sleeve 7, a spring 8, a vibrator pin 6 and two saddle bulges 13. One end of the oscillator seat 9 is provided with a screw rod which can be arranged on the antenna main rod 4, then the spring 8 is sleeved, the sleeve 7 is sleeved on the spring 8, and when the antenna oscillator 1 needs to be folded, the sleeve 7 has downward pressure on the spring 8, so that the spring 8 is forced to be in a compressed state. Two saddle bulges 13 are positioned at the other end of the oscillator seat 9, the saddle bulges 13 are provided with holes for installing oscillator pins 6, the oscillator hinge 11 of the antenna oscillator 1 is positioned between the two saddle bulges 13, and the oscillator pins 6 penetrate into the holes of the saddle bulges 13 and the strip holes 12 of the oscillator hinge 11, so that the antenna oscillator 1 and the oscillator joint 2 form a hinge connection mode. The vibrator pin 6 is made of stainless steel, and other components are made of hard aluminum for conducting oxidation. The configuration diagram of the transducer joint 2 in the expanded state is shown in fig. 3, and the configuration diagram of the transducer joint in the folded state is shown in fig. 4.

The spring 8 in the vibrator joint 2 adopts a cylindrical compression spring. The length of the spring 2 in the extension state, the length of the spring 2 in the compression state, the pretightening force of the spring in the extension state and the pretightening force of the spring in the compression state are determined according to the actual design requirements.

When the antenna oscillator 1 is unfolded, the spring 8 and the sleeve 7 bounce to fix the hinge structure and limit the unfolded state of the antenna oscillator 1. When antenna element 1 is folded, with 8 sleeve 7 manual pullbacks of spring, antenna element 1 can rotate to fold condition around oscillator hinge 11, again with antenna element 1 along rectangular hole 12 push back, at last releases the spring sleeve, and antenna element 1 is kick-backed spacingly by 8 sleeve 7 of spring, and the rigidity of antenna element when realizing fold condition.

The installation steps of the foldable yagi antenna are as follows:

1. a vibrator hinge 11 of an antenna vibrator 1 and a saddle protrusion 13 of a vibrator holder 9 are connected to each other by a vibrator pin 6 to form a hinge.

2. Two antenna main rods 4 of the yagi antenna are fixedly connected through a nylon bracket.

3. The sleeve 7 and the spring 8 are sequentially sleeved on the vibrator seat 9 of the vibrator hinge and then are in screwed connection with the antenna main rod.

4. And mounting the externally-mounted interface part 3 of the antenna at the corresponding position of the antenna main rod through a screw to complete the assembly.

The operation of the antenna element 1 from the folded state to the unfolded state is completed with reference to fig. 5. Firstly, the sleeve 7 is manually pushed back to a spring compression state, then the antenna oscillator 1 is rotated and straightened through the oscillator hinge 11, and finally the sleeve 7 is loosened to rebound to fix the position of the antenna oscillator 1. Conversely, the operation of the antenna element 1 from the unfolded state to the folded state is completed with reference to fig. 5. Firstly, sleeve 7 is pushed back to spring 8 compression state manually, then antenna element 1 is bent to 90 degrees through oscillator hinge 11 rotation, and antenna element 1 is pushed back along rectangular hole 12, sleeve 7 is loosened to make it rebound, and stop ring 10 of antenna element 1 is withstood, and the fixation of antenna element 1 folding state is completed.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present disclosure.

Claims

1. The utility model provides a collapsible yagi antenna, includes antenna element (1), externally installs interface spare (3), antenna mobile jib (4) and radio frequency interface (5), its characterized in that still includes oscillator joint (2), and the one end of oscillator joint (2) is connected with antenna mobile jib (4) through the spiro union form, and the other end passes through the hinge form to be connected with antenna element (1) and realizes folding and the expansion of antenna element (1).

2. The foldable yagi antenna according to claim 1, wherein one end of the antenna element (1) is provided with a flat element hinge (11), the tail end of the element hinge (11) is of a semi-circular structure, and the element hinge (11) is provided with a long hole (12).

3. A foldable yagi antenna according to claim 2, characterized in that the antenna element (1) is further provided with a stop ring (10), and the diameter of the stop ring (10) is larger than or equal to the diameter of the sleeve (7).

4. A foldable yagi antenna according to claim 2 or 3, characterized in that the number of antenna elements (1) is 8.

5. A foldable yagi antenna according to claim 3, wherein the oscillator joint (2) comprises an oscillator base (9), a sleeve (7), a spring (8), an oscillator pin (6) and two saddle protrusions (13); one end of the vibrator seat (9) is provided with a screw rod for connecting the antenna main rod (4), the sleeve (7) and the spring (8) are sleeved on the vibrator seat (9), saddle protrusions (13) are provided with holes capable of installing vibrator pins (6), the vibrator hinge (11) is located between the two saddle protrusions (13), and the vibrator pin (6) penetrates through the holes of the saddle protrusions (13) and the strip-shaped hole (12) of the vibrator hinge (11) so that the antenna vibrator (1) and the vibrator joint (2) are in a hinge connection mode.

6. A foldable yagi antenna according to claim 5, characterized in that the spring (8) is a cylindrical compression spring.

7. A foldable yagi antenna according to claim 5, characterized in that the diameter of the sleeve (7) is equal to or larger than the spring (8).

8. A foldable yagi antenna according to claim 5, characterized in that the element pin (6) is made of stainless steel.