CN104183907B - A kind of low-frequency vibrator - Google Patents

Abstract

The invention relates to a low-frequency vibrator; it includes a fixing piece and a radiation unit arranged on the fixing piece; the radiation unit includes four sets of mutually perpendicular radiation arm groups, and each group of radiation arm groups includes a first radiation rod and a second radiation arm group. Two radiation rods; high-frequency radiation branches extend between the free ends of the first radiation rods of each group and the free ends of the second radiation rods of the adjacent group of radiation arms; the high-frequency radiation branches There is also a third radiating rod extending from the section, and the free end of the third radiating rod extends downwards to extend the radiating branch in the low frequency range; it also includes two single-layer microstrip circuit boards; it also includes a parasitic radiation sheet; it includes buckle; the single-layer microstrip circuit board includes a PCB board and a microstrip circuit arranged on the PCB board. Through reasonable structural design, it can provide a low-frequency vibrator with small size, simple structure, easy assembly and firmness after assembly; its front-to-back ratio is large, reaching more than 26dB; its gain is also large.

Description

a low frequency vibrator

technical field

The invention relates to a low frequency vibrator.

Background technique

At present, the low-frequency vibrators on the market are often submitted to be relatively large due to structural reasons, generally 180mm*180mm*77mm, and the increase in volume will bring many negative adverse effects to the antenna; and the front-to-back ratio of similar vibrators is currently The index is low, generally at 23dB; the gain is also limited; the most important thing is that the structure and installation of the current low-frequency vibrator are relatively complicated, and there cannot be a relatively simple structure for quick assembly, and the assembled product is not strong.

Contents of the invention

The object of the present invention is to overcome the disadvantages mentioned above, and provide a low-frequency vibrator with small size, simple structure, easy assembly and firmness after assembly.

In order to achieve the above object, the specific solution of the present invention is as follows: the low-frequency vibrator includes a fixing piece and a radiation unit arranged on the fixing piece; the radiation unit includes four sets of mutually perpendicular radiation arm groups, and each group of radiation arm groups includes There are first radiation rods and second radiation rods arranged side by side; high-frequency bands extend between the free ends of the first radiation rods of each group and the free ends of the second radiation rods of the adjacent group of radiation arms A radiation branch; the high-frequency radiation branch also extends a third radiation rod, and both sides of the free end of the third radiation rod extend downward with low-frequency extended radiation branches;

It also includes two single-layer microstrip circuit boards respectively arranged on two groups of radiation arm groups in the same direction; it also includes parasitic radiation sheets arranged on the two single-layer microstrip circuit boards.

Wherein, a buckle is included, and the buckle is used to fasten two adjacent low-frequency band extended radiation branches.

Wherein, the single-layer microstrip circuit board includes a PCB board and a microstrip circuit arranged on the PCB board.

Wherein, the single-layer microstrip circuit board is fixed to the radiation unit by plastic rivets.

Wherein, the fixing member is engaged with the radiation unit.

Wherein, the bottom of the fixing member is provided with a hook for engaging with the reflector.

The beneficial effects of the present invention are as follows: the low-frequency vibrator includes a fixing piece and a radiation unit arranged on the fixing piece; the radiation unit includes four groups of mutually perpendicular radiation arm groups, and each group of radiation arm groups includes the first radiation arm group arranged side by side A radiation rod and a second radiation rod; high-frequency radiation branches extend between the free ends of the first radiation rods of each group and the free ends of the second radiation rods of the adjacent group of radiation arms; The above-mentioned high-frequency radiation branch also extends a third radiation rod, and both sides of the free end of the third radiation rod extend downwards to extend the low-frequency radiation branch; it also includes two groups respectively arranged in the same direction A single-layer microstrip circuit board on the radiation arm group; it also includes parasitic radiation sheets arranged on two single-layer microstrip circuit boards. Through reasonable structural design, it can provide a low-frequency vibrator with small size, simple structure, easy assembly and firmness after assembly; its front-to-back ratio is large, reaching more than 26dB; its gain is also large.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is the exploded schematic view of the present invention;

Fig. 3 is the ratio measurement data figure before and after the present invention measures at 820MHZ frequency;

Fig. 4 is the ratio measurement data figure before and after the present invention measures at 855MHZ frequency;

Explanation of reference numerals in Fig. 1 to Fig. 4: 1-fixer; 11-hook; 2-radiating unit; 21-first radiating rod; 22-second radiating rod; 23-high-frequency radiation branch; 24 - the third radiating rod; 25 - low-frequency expansion radiating branch; 3 - buckle; 4 - single-layer microstrip circuit board; 5 - plastic rivets; 6 - parasitic radiation sheet.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the implementation scope of the present invention is not limited thereto. As shown in Figures 1 to 4, the low-frequency vibrator described in this embodiment includes a fixing piece 1 and a radiation unit 2 arranged on the fixing piece 1; the radiation unit 2 includes four sets of mutually perpendicular radiation arm groups , each group of radiation arm groups includes a first radiation rod 21 and a second radiation rod 22 arranged side by side; the connection between the first radiation rod 21 and the second radiation rod 22 is a U-shaped balun; the first radiation rod of each group A high-frequency radiation branch 23 extends between the free end of a radiation rod 21 and the free end of the second radiation rod 22 of an adjacent group of radiation arms; the high-frequency radiation branch 23 also extends a third Radiating rod 24, both sides of the free end of the third radiating rod 24 extend downward with low-frequency extended radiation branch 25; it also includes two single-layer micro The strip circuit board 4 also includes parasitic radiation sheets 6 arranged on the two single-layer microstrip circuit boards 4 . The low-frequency vibrator described in this embodiment includes buckles 3 , and the buckles 3 are used to fasten two adjacent low-frequency extended radiation branches 25 . In the low-frequency vibrator described in this embodiment, the single-layer microstrip circuit board 4 includes a PCB board and a microstrip circuit located on the PCB board; the microstrip coupling feeding mode is adopted, and the welding points are few, and the intermodulation stability is remarkable. Lifting: the low-frequency vibrator described in this embodiment, the single-layer microstrip circuit board 4 is fixed to the radiation unit 2 through plastic rivets 5 . In the low-frequency vibrator described in this embodiment, the fixing member 1 is engaged with the radiation unit 2 . In the low-frequency vibrator described in this embodiment, the bottom of the fixing member 1 is provided with a hook 11 for engaging with the reflector. The low-frequency vibrator described in this embodiment effectively reduces the height of the radiation unit 2 and makes the volume of the antenna more miniaturized; improves the front-to-back ratio index and the cross-polarization ratio index of the antenna, and makes the network coverage performance better; highly modularized and integrated The design greatly facilitates production and assembly, and the electrical performance has high consistency; the radiation unit 2 is fixed by an integrated plastic part, which greatly improves the suppression ability of intermodulation products.

The low-frequency vibrator includes a fixing part 1 and a radiation unit 2 arranged on the fixing part 1; the radiation unit 2 includes four sets of mutually perpendicular radiation arm groups, and each group of radiation arm groups includes first radiation rods arranged side by side 21 and the second radiating rod 22; the free end of the first radiating rod 21 of each group and the free end of the second radiating rod 22 of the adjacent group of radiating arm groups are extended with a high-frequency radiation branch 23 The high-frequency band radiation branch 23 also extends a third radiation rod 24, and both sides of the free end of the third radiation rod 24 extend downward with a low-frequency band extended radiation branch 25; The single-layer microstrip circuit board 4 on the two groups of radiation arms in the same direction; also includes the parasitic radiation sheet 6 arranged on the two single-layer microstrip circuit boards 4 . Through reasonable structural design, it can provide a low-frequency vibrator with small size, simple structure, easy assembly and firmness after assembly; its front-to-back ratio is large, reaching more than 26dB; its gain is also large.

Through experimental verification, it is known that the front-to-back ratio has reached more than 26dB on average. Now take two frequencies of 820MHZ and 855MHZ to measure the front-to-back ratio. Its front-to-back ratio is 27dB.

Therefore, the present invention realizes a relatively large front-to-back ratio with stable performance and strong reliability through a relatively simple structure.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present invention are included in the protection scope of the patent application of the present invention.

Claims (4)

1. a low-frequency vibrator, it is characterised in that: include fixture (1) and the radiating element (2) being located on fixture (1)；Described radiating element (2) includes four groups of mutually perpendicular radiation arm groups, and often group radiation arm group includes the first radiation under (21) and the second radiation under (22) being arranged side by side；Described first radiation under (21) and the second radiation under (22) junction are U-shaped balun；High band radiation detail (23) all it is extended with between the free end of second radiation under (22) of the free end of described the first radiation under (21) often the organized radiation arm group with adjacent a group；Described high band radiation detail (23) is also extended with one the 3rd radiation under (24), and the both sides of the free end of described 3rd radiation under (24) have all downwardly extended low-frequency range and expanded radiation detail (25)；

Also include two single layer microstrip wiring boards (4) being respectively arranged in unidirectional two groups of radiation arm groups；Also include the parasitic radiation sheet (6) being located on two single layer microstrip wiring boards (4)；

Including buckle (3), described buckle (3) sets two adjacent low-frequency ranges for card and expands radiation detail (25)；

Described single layer microstrip wiring board (4) includes pcb board and the microstrip circuit being located on pcb board.

A kind of low-frequency vibrator the most according to claim 1, it is characterised in that: described single layer microstrip wiring board (4) is fixed with radiating element (2) by plastic cement rivet (5).

A kind of low-frequency vibrator the most according to claim 1, it is characterised in that: described fixture (1) and radiating element (2) clamping.

A kind of low-frequency vibrator the most according to claim 1, it is characterised in that: the bottom of described fixture (1) is provided with for the snap fit (11) with reflecting plate clamping.