CN215342970U

CN215342970U - Watch GNSS antenna assembly and watch

Info

Publication number: CN215342970U
Application number: CN202121599738.6U
Authority: CN
Inventors: 刘硕; 刘源; 唐龙; 杨开月
Original assignee: Inpaq Technology Suzhou Co Ltd
Current assignee: Inpaq Technology Suzhou Co Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-12-28
Anticipated expiration: 2031-07-14

Abstract

The utility model discloses a watch GNSS antenna assembly and a watch, and belongs to the technical field of communication. The GNSS antenna assembly provided by the utility model comprises a dielectric slab, and a first branch antenna and a second branch antenna which are arranged on the dielectric slab, wherein the first branch antenna and the second branch antenna have the same structure and are vertical to each other, and the first branch antenna and the second branch antenna are coupled through a power division coupler to realize GNSS communication. According to the watch GNSS antenna assembly provided by the utility model, two mutually vertical branch antennas are integrated on the small-sized dielectric plate and are coupled through the power division coupler, the structure is compact, the requirement of circular polarization characteristics is met, the miniaturization and the light weight of the antenna assembly are realized on the premise of achieving higher radiation efficiency, and the watch GNSS antenna assembly is convenient to integrate on a watch.

Description

Watch GNSS antenna assembly and watch

Technical Field

The utility model belongs to the technical field of communication, and particularly relates to a watch GNSS antenna assembly and a watch.

Background

With the rapid global development of the Global Positioning System (GPS), especially the massive use of the GPS in mobile phones, watches, and other services, the user has higher and higher requirements for the antenna for implementing GPS and GNSS communication, which not only requires the circular polarization characteristic to be satisfied, but also provides higher requirements for its miniaturized appearance and integration level. At present, common circular polarized antenna is four arm helical antenna, and it includes four antenna arms, and occupation space is great relatively, and overall structure is that the cylinder is not suitable for the preparation on planar structure, so to this kind of miniaturized handheld terminal of wrist-watch, how to design a compact structure, the integrated level is high, the high light-weight type miniaturized GNSS antenna of radiation efficiency just becomes the problem of awaiting the opportune moment to solve.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, embodiments of the present invention provide a GNSS antenna assembly for a watch and the watch. The technical scheme is as follows:

the utility model provides a watch GNSS antenna assembly, which comprises a dielectric slab, a first branch antenna and a second branch antenna, wherein the first branch antenna and the second branch antenna are arranged on the dielectric slab, have the same structure and are mutually vertical, and are coupled through a power division coupler to realize GNSS communication.

In some embodiments, the first branch antenna and the second branch antenna have the same linear polarization amplitude and are installed on the dielectric plate in a counterclockwise arrangement with a phase difference of 90 °, and the first branch antenna and the second branch antenna do not interfere with each other.

In some embodiments, the first branch antenna includes a first feeding arm, a first short-circuit arm, and a first antenna body, the second branch antenna includes a second feeding arm, a second short-circuit arm, and a second antenna body, and both the first short-circuit arm and the second short-circuit arm short-circuit the dielectric plate to ground.

In some embodiments, the first antenna body and the second antenna body are both routed through LDS.

In some embodiments, the power splitting coupler comprises a power splitting feed network having two input terminals and two output terminals, one of the two output terminals being suspended from ground.

In some embodiments, the first feed arm and the second feed arm feed into two input terminals of the feed network, respectively.

In some embodiments, the first branch antenna is mounted on the dielectric plate by a thimble or a pogo pin; the second branch antenna is installed on the dielectric plate through a thimble or a spring pin.

In some embodiments, the first branch antenna and the second branch antenna are both PIFA antennas or CHIP antennas or PATCH antennas.

The utility model further provides a watch, and the watch is provided with any antenna assembly.

In some embodiments, the power splitting coupler is mounted on a circuit board of the watch.

The technical scheme provided by the embodiment of the utility model has the following beneficial effects:

according to the watch GNSS antenna assembly provided by the utility model, two mutually vertical branch antennas are integrated on the small-sized dielectric plate and are coupled through the power division coupler, the structure is compact, the requirement of circular polarization characteristics is met, the miniaturization and the light weight of the antenna assembly are realized on the premise of achieving higher radiation efficiency, and the watch GNSS antenna assembly is convenient to integrate on a watch.

Drawings

The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of a watch GNSS antenna assembly of the present invention;

fig. 2 shows a schematic diagram of the feed network in the watch GNSS antenna assembly according to the utility model.

The attached drawings are marked as follows:

a first branch antenna-1; a first feeding arm-11; a first shorting arm-12; a first antenna body-13;

a second branch antenna-2; a second feeding arm-21; a second shorting arm-22; a second antenna body-23;

a dielectric plate-3;

a feed network-4; a first input terminal-41; a second input-42; a first output terminal-43; a second output terminal-44.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the descriptions of the present invention with respect to the directions of "left", "right", "lower", etc. are defined based on the relationship of the orientation or position shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device described must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "plurality" or "a number" means two or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, such mechanical terms as "mounted," "disposed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or integral connections; the connection can be mechanical connection, electrical connection or communication connection; they may be directly connected to each other, indirectly connected to each other through an intermediate member, or connected to each other through the inside of two members. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

According to the watch GNSS antenna assembly provided by the embodiment of the utility model, the two mutually perpendicular branch antennas are integrated on the small-sized dielectric plate and are coupled through the power division coupler, the structure is compact, the requirement of circular polarization characteristics is met, the miniaturization and the light weight of the antenna assembly are realized on the premise of achieving higher radiation power, and the watch GNSS antenna assembly is convenient to integrate on a watch.

The technical solution of the present application will be described in detail with reference to fig. 1-2, and it should be noted that, in each embodiment shown in fig. 1-2, the same or corresponding contents may be mutually referred to, and are not repeated in the following.

Example 1

Fig. 1 is a schematic structural diagram of a watch GNSS antenna assembly provided by the present invention, and the following is a detailed description of the embodiment, referring to fig. 1.

The watch GNSS antenna assembly provided by this embodiment includes a dielectric slab 3, and a first branch antenna 1 and a second branch antenna 2 mounted on the dielectric slab, wherein the first branch antenna 1 and the second branch antenna 2 have the same structure and are perpendicular to each other, and the first branch antenna 1 and the second branch antenna 2 are coupled by a power division coupler to implement GNSS communication.

Preferably, the first branch antenna 1 and the second branch antenna 2 have the same polarization amplitude and are installed on the dielectric plate 3 in a counterclockwise arrangement with a phase difference of 90 °, and no interference occurs between the first branch antenna 1 and the second branch antenna 2.

Specifically, GNSS is a short term for Global Navigation Satellite System (Global Navigation Satellite System), which generally refers to all Global, regional, and enhanced Satellite Navigation systems, and based on the multi-Satellite positioning feature of the Satellite positioning System, the receiving antenna needs to have a wide beam characteristic to receive Satellite signals in different directions. The GNSS antenna is a GPS/GLONASS compatible antenna, is mainly used for a transmitting antenna of a co-frequency forwarding system, and can also be used for a receiving antenna of a GPS navigation and positioning system. In order to receive satellite navigation signals with right-hand polarization, the watch GNSS antenna assembly provided by this embodiment includes a first branch antenna 1 and a second branch antenna 2 that are identical in structure and perpendicular to each other, and these two branch antennas are fed with equal amplitude and are installed on a dielectric plate 3 in a counterclockwise arrangement with a phase difference of 90 °, that is, the phase of the radiation wave of the second branch antenna 1 lags behind the phase of the radiation wave of the first branch antenna 2 by 90 °. Further, the polarization is not interfered between the two branch antennas. Furthermore, the two branch antennas are coupled through the power division coupler to realize GNSS communication, most of currents in the two perpendicular branch antennas are perpendicular to each other, and the mutual coupling effect is small.

More specifically, the dielectric board 3 is a PCB board, and further, the dielectric board 3 is a copper-clad FR4 board having dimensions of 35mm × 40mm × 0.6mm (length of 40mm, width of 35mm, and thickness of 0.6 mm).

Preferably, the first branch antenna 1 includes a first feeding arm 11, a first short-circuit arm 12 and a first antenna body 13, and the second branch antenna 2 includes a second feeding arm 21, a second short-circuit arm 22 and a second antenna body 23, wherein the first short-circuit arm 12 and the second short-circuit arm 22 are both short-circuited to the dielectric plate 3 for grounding.

Preferably, the first antenna body 13 and the second antenna body 23 are both routed through the LDS form.

Specifically, the first branch antenna 1 and the second branch antenna 1 are both dual-arm antennas, wherein the first branch antenna 1 includes a first feeding arm 11, a first short-circuit arm 12 and a first antenna body 13, and the second branch antenna 2 includes a second feeding arm 21, a second short-circuit arm 22 and a second antenna body 23. The first feeding arm 11 and the second feeding arm 21 both include feeding points, the first short-circuit arm 12 and the second short-circuit arm 22 both include short-circuit points, the short-circuit points on the first short-circuit arm 12 and the second short-circuit arm 22 are respectively short-circuited with the dielectric plate 3 to be grounded, and the first antenna body 13 and the second antenna body 23 are both wired in an LDS manner. More specifically, limited by the size of the watch and the numerous internal metal structures (MIC, battery, motherboard, screen, cable, etc.), the first branch antenna 1 and the second branch antenna 2 are physically wired in the LDS format, thereby saving the occupied space of the antenna assembly. Different from the existing four-wall helical antenna, the two branch antennas in the embodiment are both dual-arm antennas, so that the structure of the antenna assembly is greatly simplified, the weight is lighter, and the occupied space is small.

Preferably, the power splitting coupler comprises a power splitting feed network 4, and the power splitting feed network 4 has two input ends and two output ends, and one of the two output ends is suspended to the ground.

Further, the first feeding arm 11 and the second feeding arm 21 of the two branch antennas are respectively fed into two input ends of the feeding network.

Specifically, in this embodiment, the power division coupler may combine multiple signal energies into one path for output, and preferably, the power division coupler is a 3db power division coupler, so as to ensure that an axial ratio within an effective bandwidth of the antenna assembly is within 3 db. The power division coupler comprises a power division feed network 4, and the power division feed network 4 has two input ends (a first input end 41, a second input end 42) and two output ends (a first output end 43, a second output end 33), so that two paths of signal energy are coupled into one path of signal energy to be output. More specifically, the first feeding arm 11 and the second feeding arm 21 of the two branch antennas are respectively connected to two input ends of the feeding network 4 (assuming that the first feeding arm 11 is connected to the first input end 41 of the feeding network 4 and the second feeding arm 21 is connected to the second input end 42 of the feeding network 4), one output end of the two output ends is suspended (i.e. one output end of the first output end 43 and the second output end 44 is grounded, the other output end outputs a coupled signal, and assuming that the first output end 43 is grounded and the second output end 44 outputs a coupled signal), accordingly, the radiation wave signals of the first branch antenna 1 and the radiation wave signals of the second branch antenna 2 having equal amplitudes and different phases by 90 ° are coupled by the power splitting coupler and then output the coupled signals from the second output end 44 to implement GNSS communication.

More specifically, fig. 2 shows a schematic diagram of the feed network 4 in the watch GNSS antenna assembly provided in this embodiment, as shown in fig. 2, the feed network 4 is composed of capacitors and resistors connected in parallel, the phase of the feed network 4 is easy to control and is not affected by structural differences between antenna arms, and higher degree of integration can be achieved at lower cost.

Preferably, the first branch antenna 1 and the second branch antenna 2 are both PIFA antennas or CHIP antennas or PATCH antennas. Specifically, the two branch antennas in this embodiment may be in various forms, including PIFA form, coupled CHIP form, and linearly polarized PATCH form.

Preferably, the first branch antenna 1 is mounted on the dielectric plate 3 through a thimble or a pogo pin; the second branch antenna 2 is mounted on the dielectric plate 3 through a thimble or a pogo pin. Specifically, the feeding point on the first feeding arm 11 of the first branch antenna 1 is mounted in contact with the dielectric plate 3 through a pin or a pogo pin, and similarly, the feeding point on the second feeding arm 21 of the second branch antenna 2 is also mounted in contact with the dielectric plate 3 through a pin or a pogo pin.

Example 2

The utility model also provides a watch, and the watch is provided with the antenna assembly in the embodiment 1.

It should be noted that the watch mounted with any of the antenna assemblies in embodiment 1 may have a square, circular, triangular, etc. appearance, which is not limited in this embodiment.

Preferably, the aforementioned power splitting coupler is mounted on a circuit board of the watch. That is, the feeding network 4 in the power splitting coupler is distributed on the circuit board of the watch.

Specifically, the GNSS antenna assembly of example 1 is mounted on a watch (for visualization and discussion convenience, it is assumed that the watch is a square watch):

(1) two right-angle sides of the square watch are selected as installation areas of the two branch antennas.

(2) A copper-laid FR4 dielectric slab with the length of 40mm, the width of 35mm and the thickness of 0.6mm is selected, a first branch antenna 1 and a second branch antenna 2 are vertically arranged on the dielectric slab 3, the two branch antennas feed in the same amplitude, and the phase difference of the radiated signal waves is 90 degrees. More specifically, the first branch antenna 1 is mounted on the edge of the long side (40mm) of the dielectric plate 3, and the second branch antenna 2 is mounted on the edge of the wide side (35mm) of the dielectric plate 3.

(3) A 3db power splitting coupler is selected, the feed network 4 of which comprises 3 capacitors of 1.8pF and 3 resistors of 5.6 nH. The feeding point of the first feeding arm 11 of the first branch antenna 1 is connected to the first input end 41 of the power splitting coupler, the feeding point of the second feeding arm 21 of the second branch antenna 2 is connected to the second input end 42 of the power splitting coupler, the first output end 43 of the power splitting coupler is grounded, and the second output end 44 outputs the coupled signal, so that the right-hand circularly polarized signal of the GNSS antenna assembly is output.

On this basis, the test was conducted (wherein "wristband" is data obtained by performing a test while wearing the watch on the wrist, "wristband" is data obtained by performing a test while not wearing the watch on the wrist).

If the first branch antenna 1 and the second branch antenna 2 are both PIFA antennas, the performance index of the GNSS antenna assembly is as follows:

if the second branch antenna 1 and the second branch antenna 2 are PATCH antennas, and other structures and values are not changed, the performance index of the GNSS antenna assembly is as follows:

if the second branch antenna 1 and the second branch antenna 2 are both CHIP antennas, and other structures and values are not changed, the performance indexes of the GNSS antenna assembly are as follows:

according to the test data in the table, the watch GNSS antenna assembly provided by the utility model has higher efficiency while realizing circular polarization, and can ensure that the axial ratio in the effective bandwidth is within 3 dB.

according to the watch GNSS antenna assembly provided by the utility model, two mutually vertical branch antennas are integrated on the small-sized dielectric plate and are coupled through the power division coupler, the structure is compact, the requirement on circular polarization characteristics is met, the miniaturization and the light weight of the antenna assembly are realized on the premise of achieving higher radiation efficiency, and the watch GNSS antenna assembly is convenient to integrate on a watch.

All the above-mentioned optional technical solutions can be combined arbitrarily to form the optional embodiments of the present invention, and are not described herein again.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the true scope of the embodiments of the present application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Those not described in detail in this specification are within the skill of the art.

Claims

1. A watch GNSS antenna assembly, which comprises a dielectric slab, and a first branch antenna and a second branch antenna mounted on the dielectric slab, wherein the first branch antenna and the second branch antenna have the same structure and are perpendicular to each other, and are coupled through a power division coupler to realize GNSS communication.

2. The watch GNSS antenna assembly of claim 1, wherein the first branch antenna and the second branch antenna have the same polarization amplitude and are mounted on the dielectric plate in a counterclockwise arrangement with a phase difference of 90 ° therebetween without interference.

3. The watch GNSS antenna assembly of claim 1 wherein the first branch antenna includes a first feed arm, a first shorting arm and a first antenna body, the second branch antenna includes a second feed arm, a second shorting arm and a second antenna body, the first shorting arm and the second shorting arm both shorting the dielectric plate to ground.

4. The watch GNSS antenna assembly of claim 3, wherein the first and second antenna bodies are routed via LDS.

5. The watch GNSS antenna assembly of claim 3, wherein the power splitting coupler includes a power splitting feed network having two input terminals and two output terminals, one of the two output terminals being suspended from ground.

6. The watch GNSS antenna assembly of claim 5, wherein the first feed arm and the second feed arm feed into two inputs of the feed network, respectively.

7. The watch GNSS antenna assembly of claim 1, wherein the first branch antenna is mounted on the dielectric plate by a thimble or a pogo pin; the second branch antenna is installed on the dielectric plate through a thimble or a spring pin.

8. The watch GNSS antenna assembly of claim 1, wherein the first branch antenna and the second branch antenna are both PIFA antennas or PATCH antennas or CHIP antennas.

9. A watch fitted with an antenna assembly according to any one of claims 1 to 8.

10. The watch of claim 9, wherein the power splitting coupler is mounted on a circuit board of the watch.