CN213151012U

CN213151012U - Dual-frequency miniaturized terminal antenna

Info

Publication number: CN213151012U
Application number: CN202022444928.2U
Authority: CN
Inventors: 李劼; 吴伟夏
Original assignee: Hainan Zhinuo Network Communication Technology Co ltd
Current assignee: Hainan Zhinuo Network Communication Technology Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-05-07
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a dual-frenquency miniaturized terminal antenna, including dielectric substrate, irradiator, circle feed unit, connecting seat, the irradiator is located on the dielectric substrate, the irradiator with the feed unit links to each other, the connecting seat is located feed unit below, the surface of dielectric substrate is encircleed and is equipped with a plurality of recesses and a plurality of archs, the recess with protruding interval arrangement in proper order sets up, the recess with level and smooth connection between the arch, the irradiator includes four group's spiral arms, the spiral arm according to same direction spiral set up in the surface of dielectric substrate. The utility model discloses a terminal antenna simple structure, small, convenient to carry can work in two frequency channels, can be used to mobile satellite dual-frenquency receiving and dispatching communication.

Description

Dual-frequency miniaturized terminal antenna

Technical Field

The utility model relates to an antenna equipment technical field, more specifically relates to a miniaturized terminal antenna of dual-band.

Background

An antenna is an important radio device for transmitting and receiving electromagnetic waves. With the rapid development of mobile satellite communication technology, the market demand for high-performance antenna products is also increasing. In mobile satellite communication earth stations and satellite navigation devices, antennas are required to have wide-beam, circularly polarized characteristics in order to keep the satellite within the coverage of the antenna beam during movement. Meanwhile, the antenna needs to be capable of realizing two working frequency bands so as to share one antenna for receiving and transmitting. The quadrifilar helical antenna has excellent circular polarization characteristics and wide beam characteristics, and thus is widely used for mobile satellite communication. At present, the traditional dual-frequency quadrifilar helix antenna adopts a mode that two single-frequency quadrifilar helices are stacked up and down or nested inside and outside, and the design mode has the characteristics of complex structure and large volume. Because mobile communication terminal devices are generally limited in size and mass, the conventional antenna cannot meet the urgent requirements for a handheld terminal device which is smaller in size and more convenient to carry.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a dual-band miniaturized terminal antenna, the antenna structure that mainly used is solved and is gone up the mobile terminal equipment complicated, bulky, carry inconvenient, the single problem of working frequency channel.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a dual-frenquency miniaturized terminal antenna, includes dielectric substrate, irradiator, feed unit, connecting seat, the irradiator is located on the dielectric substrate, the irradiator with feed unit links to each other, the connecting seat is located feed unit below, dielectric substrate's surface is encircleed and is equipped with a plurality of recesses and a plurality of arch, the recess with protruding interval arrangement in proper order sets up, the recess with smooth connection between the arch, the irradiator includes four group spiral arms, the spiral arm according to same direction spiral set up in dielectric substrate's surface.

Preferably, the groove and the protrusion are a horizontal or inclined annular groove and an annular protrusion.

Preferably, the groove and the protrusion are spiral grooves and spiral protrusions spirally arranged on the surface of the medium substrate.

Preferably, each group of spiral arms comprises a long spiral arm and a short spiral arm, the long spiral arm is connected with the bottom of the short spiral to form a feed point, and the long spiral arms and the short spiral arms of the four groups of spiral arms are uniformly distributed on the surface of the medium substrate around the central axis of the medium substrate.

Preferably, the medium substrate is provided with a hemispherical top, and the end of the long spiral arm extends to the hemispherical top.

Preferably, the feed unit is provided with one input port and four output ports, the input port is connected with the radio frequency connector inside the connecting seat, and the output port is connected with the feed point of the spiral arm.

Preferably, the power supply device further comprises an outer cover, the outer cover is arranged outside the dielectric substrate and the feed unit and fixedly connected with the connecting seat, and the outer cover is made of insulating plastic materials.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is:

the utility model provides a dual-frequency miniaturized terminal antenna sets up a plurality of recesses and arch through interval in proper order on dielectric substrate surface, makes dielectric substrate's surface is the undulation form, thereby increases the extensible route of spiral arm when dielectric substrate surface spiral. Under the condition that spiral arm length is the same, through the design, can make the spiral radius of spiral arm and the axial length of spiral littleer, thereby make the radius and the height of dielectric substrate are littleer, and then effectively reduce terminal antenna's diameter and height under the performance prerequisite of guaranteeing terminal antenna, compare with the handheld terminal antenna of current mobile satellite communication, have reduced the structure size effectively, conveniently carry, can satisfy user's urgent demand, have improved the competitiveness of product.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.

Fig. 1 is a schematic view of the overall structure of the dual-band miniaturized terminal antenna of the present invention;

FIG. 2 is a schematic structural view of a dielectric substrate with spiral grooves and spiral protrusions according to the present invention;

FIG. 3 is a schematic view of the overall structure of the dielectric substrate and the spiral arm according to embodiment 2 of the present invention;

in the figure, 1-dielectric substrate, 2-spiral arm, 21-long spiral arm, 22-short spiral arm, 3-feed unit, 4-connecting seat, 5-groove, 6-projection, 7-feed point, 8-hemispherical top, 9-radio frequency connector and 10-outer cover.

Detailed Description

For a better understanding of the technical content of the present invention, the following embodiments are provided, and the present invention is further described with reference to the accompanying drawings:

example 1

Referring to fig. 1, a miniaturized terminal antenna of dual-frenquency, includes dielectric substrate 1, irradiator, feed unit 3, connecting seat 4, the irradiator is located on the dielectric substrate 1, the irradiator with feed unit 3 links to each other, connecting seat 4 is located feed unit 3 below, the surface of dielectric substrate 1 is encircleed and is equipped with a plurality of recesses 5 and a plurality of arch 6, recess 5 with arch 6 interval arrangement sets up in proper order, recess 5 with smooth connection between the arch 6, the irradiator includes four spiral arms 2 of group, spiral arm 2 according to same direction spiral set up in the surface of dielectric substrate 1.

The plurality of grooves 5 and the plurality of protrusions 6 are sequentially arranged on the surface of the medium substrate 1 at intervals, so that the surface of the medium substrate 1 is wavy, and when the spiral arm 2 is arranged on the surface of the medium substrate 1, the extensible path of the spiral arm 2 on the surface of the medium substrate 1 can be increased. Under the condition that spiral arm 2 length is the same, through the design, can make the spiral radius of spiral arm 2 and the axial length of spiral littleer to make the radius and the height of dielectric substrate 1 are littleer, and then effectively reduce the diameter and the height of terminal antenna under the performance prerequisite of guaranteeing terminal antenna, reduce the structure size of terminal antenna effectively, conveniently carry.

Specifically, the groove 5 and the protrusion 6 are a circular groove 5 and a circular protrusion 6 which are horizontally or obliquely arranged, or a spiral groove 5 and a spiral protrusion 6 which are spirally arranged on the surface of the medium substrate. The arrangement pattern of the grooves 5 and the protrusions 6 on the media substrate 1 is not particularly limited as long as the media substrate 1 can reach the wavy surface, and the extending path of the spiral arm 2 is effectively increased, in this embodiment, the grooves 5 and the protrusions 6 are arranged as horizontal annular grooves 5 and annular protrusions 6, and other preferred patterns can be as shown in fig. 2.

The spiral arm 2 may be disposed on the dielectric substrate 1 by plating, etching, laser engraving, or the like. Compared with the mode that a metal wire is directly wound on the dielectric substrate 1 to form a spiral shape, the electroplating, corrosion and laser engraving modes adopted in the embodiment have the advantages of small size, light weight and the like, and are more suitable for mobile satellite communication handheld terminal antennas.

Specifically, each group of spiral arms 2 includes a long spiral arm 21 and a short spiral arm 22, the long spiral arm 21 and the short spiral 22 are connected at the bottom to form a feeding point 7, and the long spiral arms 21 and the short spiral arms 22 of the four groups of spiral arms 2 are uniformly distributed on the surface of the dielectric substrate 1 around the central axis of the dielectric substrate 1. Through setting up the length of adjusting long spiral arm 21 and short spiral arm 22, make long spiral arm 21 resonance in the low band, short spiral arm 22 resonance in the high band to realize dual-frenquency work, satisfy the mobile satellite communication and receive, send out shared demand, compare with current mobile satellite communication handheld terminal antenna, widened the bandwidth of antenna, can satisfy more users' needs.

Specifically, the feed unit 3 is provided with one input port and four output ports, the current amplitudes of the four output ports are equal, the phase difference between every two output ports is 90 °, the input port is connected with the radio frequency connector 9 inside the connecting seat 4 and used for feeding four groups of spiral arms 2, and the output ports are connected with the feed points of the spiral arms 2 and used for realizing the circular polarization performance of the four groups of spiral arms 2.

Specifically, the antenna further comprises an outer cover 10, the outer cover 10 is arranged outside the dielectric substrate 1 and the feed unit 3 and fixedly connected with the connecting seat 4, and the outer cover 10 is made of an insulating plastic material. The housing is used for accommodating and sealing the dielectric substrate 1, the spiral arm 2 and the circularly polarized feed component 3, and effectively protecting the dielectric substrate, the spiral arm 2 and the circularly polarized feed component 3.

Example 2

Referring to fig. 3, the present embodiment 2 is different from embodiment 1 in that the dielectric substrate 1 is provided with a hemispherical top 8, and the end of the long spiral arm 21 extends to the hemispherical top 8. By the design, the extendable path of the long spiral arm 21 can be further extended, and the structural size of the terminal antenna can be further reduced compared with other mobile satellite communication handheld terminal antennas under the condition that the length of the long spiral arm 21 is equal.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a dual-frenquency miniaturized terminal antenna, includes dielectric substrate, irradiator, feed unit, connecting seat, the irradiator is located on the dielectric substrate, the irradiator with feed unit links to each other, the connecting seat is located feed unit below, its characterized in that, dielectric substrate's surface is encircleed and is equipped with a plurality of recesses and a plurality of arch, the recess with protruding interval arrangement in proper order sets up, the recess with smooth connection between the arch, the irradiator includes four group spiral arms, the spiral arm according to same direction spiral set up in dielectric substrate's surface.

2. The dual band miniaturized terminal antenna of claim 1, wherein said groove and said protrusion are a ring-shaped groove and a ring-shaped protrusion which are horizontally or obliquely arranged.

3. The dual-band miniaturized terminal antenna of claim 1, wherein said grooves and protrusions are spiral grooves and spiral protrusions spirally formed on the surface of said dielectric substrate.

4. The dual-band miniaturized terminal antenna of claim 1 wherein each of said spiral arms comprises a long spiral arm and a short spiral arm, said long spiral arm and said short spiral base are connected to form a feeding point, and the long spiral arm and the short spiral arm of said four spiral arms are uniformly distributed on the surface of said dielectric substrate around the central axis of said dielectric substrate.

5. The dual band miniaturized terminal antenna of claim 4, wherein said dielectric substrate has a hemispherical top, and the end of said long spiral arm extends to said hemispherical top.

6. The dual band miniaturized terminal antenna of claim 4 wherein said feeding unit has an input port and four output ports, said input port is connected to said RF connector inside said connection base, and said output port is connected to a feeding point of said spiral arm.

7. The dual-band miniaturized terminal antenna of claim 1 further comprising a housing, wherein the housing is disposed outside the dielectric substrate and the feeding unit and is fixedly connected to the connecting base, and the housing is made of an insulating plastic material.