CN212062690U

CN212062690U - Dual-frequency positioning antenna applied to portable equipment and wearable equipment

Info

Publication number: CN212062690U
Application number: CN202021330974.3U
Authority: CN
Inventors: 谷建斌
Original assignee: Guangdong Genius Technology Co Ltd
Current assignee: Guangdong Genius Technology Co Ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-12-01
Anticipated expiration: 2030-07-08

Abstract

The utility model belongs to the technical field of the antenna, a dual-frenquency location antenna and wearable equipment is provided, dual-frenquency location antenna is including the first antenna of work at first frequency channel and the second antenna of work at the second frequency channel, first antenna with the second antenna is arranged respectively on the periphery of equipment center, first antenna has first feed end, the second antenna has second feed end, just first antenna is followed the periphery of equipment center to the second antenna extend and with the second antenna is connected to the public ground end of presenting, the public ground end of presenting with distance between the first feed end is greater than and is close to the public ground end of presenting with distance between the second feed end. The current radiation direction of the two antennas is changed by sharing a feed point, the radiation efficiency of the antenna in the hemispherical direction is increased, and the problem of inconsistent maximum radiation direction of the traditional dual-frequency GPS independent antenna scheme is solved.

Description

Dual-frequency positioning antenna applied to portable equipment and wearable equipment

Technical Field

The utility model belongs to the technical field of the antenna, especially, relate to be applied to portable equipment's dual-frenquency location antenna and wearable equipment.

Background

Currently, in some portable terminals in the market, such as mobile phones and wearable devices, dual-band Global Positioning System (GPS) chips are used to improve Positioning accuracy, and can simultaneously support L1(1.575GHz) + L5(1.176GHz) bands for Positioning.

The current dual-frequency GPS antenna implementation modes mainly include two types: firstly, the dual-frequency of an L1 wave band and an L5 wave band share one antenna; and secondly, the L1 wave band and the L5 wave band are split into 2 independent antennas. The dual-frequency GPS common antenna scheme has high requirements for antenna clearance and height, hardly meets the requirements for multifunctional miniaturized wearable equipment, cannot give consideration to the performances of antennas in L1 wave bands and L5 wave bands, and influences positioning accuracy. The scheme of the dual-frequency GPS independent antenna can solve the problem of high requirement on antenna clearance and height, but the layout mode of the two independent antennas at present generally has a certain angle difference in the maximum radiation direction, which affects the efficiency of receiving dual-frequency GPS signals.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 5G MIMO antenna and wearable equipment, the increase that aims at solving antenna quantity is unfavorable for the miniaturization, and can lead to the poor problem of isolation between the antenna.

The utility model provides a be applied to portable equipment's dual-frenquency location antenna, portable equipment includes the equipment center, dual-frenquency location antenna is including the first antenna of work at first frequency channel and the second antenna of work at the second frequency channel, first antenna with the second antenna is arranged respectively on the periphery of equipment center, first antenna has first feed end, the second antenna has second feed end, just first antenna is followed the periphery of equipment center to the second antenna extend and with the second antenna is connected to the public ground end of presenting, the public ground end of presenting with distance between the first feed end is greater than and is close to the public ground end of presenting with distance between the second feed end.

In one embodiment, the first antenna and the second antenna are disposed at one end of the middle frame of the device and are respectively located at two opposite sides in the width direction.

In one embodiment, the first antenna is a loop antenna.

In one embodiment, the first antenna is an LDS antenna.

In one embodiment, the second antenna is an inverted-F antenna.

In one embodiment, the second antenna is an LDS antenna.

In one embodiment, the first antenna operates in the GPS L1 frequency band and the second antenna operates in the GPS L5 frequency band.

In one embodiment, the trace length of the first antenna corresponds to 1/4 of the signal wavelength of the first frequency band, and the trace length of the second antenna corresponds to 1/4 of the signal wavelength of the second frequency band.

The utility model discloses the second aspect provides a wearable equipment, including the equipment center, and as above be applied to portable equipment's dual-frenquency location antenna.

In one embodiment, the device middle frame is further provided with a communication antenna along the periphery of the device middle frame, and the communication antenna is electrically isolated from the dual-frequency positioning antenna.

The dual-frequency positioning antenna applied to the portable equipment adopts a dual-frequency independent antenna scheme with low requirements on antenna clearance and height, and on the basis of the layout design, the two antennas change the current radiation direction by sharing a feed point, so that the radiation efficiency of the hemispherical direction on the antennas is increased, and the problem of inconsistent maximum radiation direction of the traditional dual-frequency GPS independent antenna scheme is solved.

Drawings

Fig. 1 is a schematic structural diagram of a dual-band positioning antenna applied to a portable device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a dual-band positioning antenna applied to a portable device according to an embodiment of the present invention;

fig. 3 is a schematic view of the embodiment of the present invention applied to a portable device worn on an arm;

FIG. 4A is a diagram of the radiation pattern of a GPS L1 antenna in a conventional dual-band positioning standalone antenna;

FIG. 4B is a diagram of the radiation pattern of a GPS L5 antenna in a conventional dual-band positioning standalone antenna;

FIG. 4C is a diagram of the radiation pattern of a GPS L1 antenna in a conventional dual-band co-antenna;

FIG. 4D is a diagram of the radiation pattern of a GPS L5 antenna in a conventional dual-band co-antenna;

FIG. 4E is a radiation pattern of a first antenna (GPS L1) antenna of the dual-band localized co-ground antenna shown in FIG. 1;

fig. 4F is a radiation pattern of a second antenna (GPS L5) antenna in the dual-band co-ground antenna shown in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2, the portable device has a device middle frame 100, and the device middle frame 100 may be made of metal, plastic, or the like. The dual-band positioning antenna applied to the portable device in the embodiment of the present application includes a first antenna 200 operating in a first frequency band and a second antenna 300 operating in a second frequency band.

The first and

second antennas

200 and 300 are respectively disposed on the periphery of the device middle frame 100, and may be formed by disposing the first and

second antennas

200 and 300 of a predetermined shape on the outer surface of the device middle frame 100 by using a Laser Direct Structuring (LDS) technique to constitute an LDS antenna. A copper foil having a predetermined shape may be attached to an outer surface of the device middle frame 100 to form the first and

second antennas

200 and 300. It will be appreciated that the material carrying the antenna on the frame 100 of the device should be an insulating material.

In this embodiment, the first antenna 200 has a first feeding end (point) 210, the second antenna 300 has a second feeding end (point) 310, so that the two independent antennas feed separately, and the first feeding end 210 and the second feeding end 310 may be respectively disposed at one end of the device middle frame 100 and located at opposite sides in the width direction. In addition, the first antenna 200 extends toward the second antenna 300 along the periphery of the device middle frame 100 and is connected to a common ground feed (common ground feed point) 250 with the second antenna 300, thereby changing the current radiation direction and increasing the hemispherical radiation efficiency on the antenna.

Referring to fig. 2, specifically, three conductive elastic pieces 510 are attached to the device motherboard 500, the three conductive elastic pieces 510 are respectively a first feeding point, a second feeding point and a common feeding point, and the three conductive elastic pieces 510 are respectively connected to the first feeding end 210, the second feeding end 310 and the common feeding end 250 of the dual-band positioning antenna through three conductive columns 520 (e.g., bolts). In other embodiments, the device motherboard 500 may be connected to the first feeding end 210, the second feeding end 310, and the common ground feeding end 250 by cables (such as coaxial lines).

In this embodiment, the distance between the common ground feeding end 250 and the first feeding end 210 is greater than the distance between the common ground feeding end 250 and the second feeding end 310, so that the common ground feeding end 250 is disposed close to the second antenna 300 and close to the second feeding end 310, thereby making the current distribution of the whole dual-frequency positioning antenna conform to the expected radiation pattern.

In some embodiments, the device middle frame 100 is a square, rectangular, polygonal (5 or more), elliptical or circular ring structure, and the first antenna 200 and the second antenna 300 are disposed at one end of the device middle frame 100 and located at two opposite sides in the width direction, respectively.

As in the example of fig. 1, the device middle frame 100 may be a polygonal ring structure, and the first antenna 200 and the second antenna 300 may be disposed at one end of the device middle frame 100 in the long axis direction and respectively located at opposite sides of the width direction perpendicular to the long axis; of course, the first antenna 200 and the second antenna 300 may also be respectively disposed at one end in the short axis direction of the apparatus middle frame 100 and at opposite sides in the width direction perpendicular to the short axis. It is understood that the first antenna 200 and the second antenna 300 are disposed in the rectangular ring-shaped or elliptical ring-shaped device middle frame 100 in a similar manner to the polygonal ring-shaped device middle frame 100. In addition, the first antenna 200 and the second antenna 300 may be disposed at one end in the direction of the transverse axis and at opposite sides in the direction of the longitudinal axis, respectively, in the frame 100 of the square-ring-shaped or circular-ring-shaped device. As such, other locations of the device bezel 100 may be reserved for the Communication antenna 400, such as one or more of a WIFI antenna, a bluetooth antenna, a 5G antenna, a 4G antenna, a 3G antenna, a 2G antenna, a Radio Frequency Identification (RFID) antenna, or a Near Field Communication (NFC) antenna.

A clock coordinate system is established with reference to the midpoint of the lower frame of the graph shown in fig. 1 as the 6 o ' clock direction, so that the first feeding end 210 of the first antenna 200 is located in the 7 o ' clock direction of the middle frame 100 of the device, the second feeding end 310 is located in the 5 o ' clock direction of the middle frame 100 of the device, and the common ground feeding end 250 is located near the second feeding end 310 and is located near the first antenna 200. In this example, since the first feeding end 210 of the first antenna 200 is far from the common ground feeding end 250, the first antenna 200 is implemented as a LOOP (LOOP) antenna, and the second antenna 300 is implemented as a normal Inverted F Antenna (IFA). In other embodiments, the positions of the first antenna 200 and the second antenna 300 may be reversed. It should be understood that the first antenna 200 is located on the side with the smaller area of the antenna, and the second antenna 300 is located on the side with the larger area to ensure the overall performance of the two antennas.

The first antenna 200 operates in the GPS L1 frequency band and the second antenna 300 operates in the GPS L5 frequency band, or vice versa. Generally, the trace length of the first antenna 200 corresponds to 1/4 of the signal wavelength of the first frequency band, and the trace length of the second antenna 300 corresponds to 1/4 of the signal wavelength of the second frequency band, so as to ensure the matching degree of the antennas; in other embodiments, the trace length of the first antenna 200 corresponds to the signal wavelength of the first frequency band, and the trace length of the second antenna 300 corresponds to the signal wavelength of the second frequency band, wherein the correspondence may be equal, or may be substantially equal to allow a difference of 5%.

The utility model discloses a second aspect provides a wearable equipment, including equipment center 100 to and be applied to portable equipment's dual-frenquency location antenna as above. Further, the device middle frame 100 is further provided with a communication antenna 400 along the periphery thereof, and the communication antenna 400 is electrically isolated from the dual-band positioning antenna to avoid mutual coupling and interference.

The dual-frequency positioning antenna applied to the portable device adopts the dual-frequency independent antenna scheme with lower requirements on antenna headroom and height under the condition that the mainboard is not changed, and has inherent disadvantages because the distance between the feed end and the ground feed end of the first antenna 200 is far: the placement position of the feeding end and the conventional antenna form have basically determined that the maximum radiation direction of the antenna is the 3 o 'clock direction of the clock coordinate system, please refer to fig. 4, so that the upper hemispherical direction is poor (refer to fig. 4A, 4B, 4C, and 4D) in the wearing mode of the arm 10 (the 3 o' clock direction of the clock coordinate system points to the shoulders of the human body), therefore, on the basis of the layout design, the first antenna 200 changes the current radiation direction by sharing the ground feeding end 250 with the second antenna 300, and increases the radiation efficiency in the upper hemispherical direction of the antenna (refer to fig. 4E and 4F), so as to effectively receive satellite signals from the sky direction, and has no influence on the isolation and radiation of other antennas, which is applicable to various wearable devices such as smart watches, bracelets, and the like.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A dual-frequency positioning antenna applied to a portable device, the portable device comprising a device middle frame, wherein the dual-frequency positioning antenna comprises a first antenna working at a first frequency band and a second antenna working at a second frequency band, the first antenna and the second antenna are respectively arranged on the periphery of the device middle frame, the first antenna is provided with a first feeding end, the second antenna is provided with a second feeding end, the first antenna extends towards the second antenna along the periphery of the device middle frame and is connected with a public feeding end together with the second antenna, and the distance between the public feeding end and the first feeding end is greater than the distance between the public feeding end and the second feeding end.

2. The dual-band positioning antenna of claim 1, wherein said first antenna and said second antenna are disposed at one end of said device bezel and on opposite sides of said device bezel, respectively.

3. The dual-band positioning antenna of claim 1, wherein said first antenna is a loop antenna.

4. The dual-band positioning antenna of claim 1 or 3, wherein said first antenna is an LDS antenna.

5. The dual-band positioning antenna of claim 1, wherein said second antenna is an inverted-F antenna.

6. The dual-band positioning antenna of claim 1 or 5 wherein said second antenna is an LDS antenna.

7. The dual-band positioning antenna of claim 1 wherein said first antenna operates in the GPS L1 frequency band and said second antenna operates in the GPS L5 frequency band.

8. The dual-band positioning antenna of claim 7, wherein the first antenna has a trace length corresponding to 1/4 wavelengths of signals in the first frequency band, and the second antenna has a trace length corresponding to 1/4 wavelengths of signals in the second frequency band.

9. A wearable device comprising a device middle frame, characterized by further comprising a dual-frequency positioning antenna applied to a portable device according to any one of claims 1 to 8.

10. The wearable device of claim 9, wherein the device bezel further comprises a communication antenna along a perimeter of the bezel, the communication antenna being electrically isolated from the dual-band positioning antenna.