GPS circularly polarized antenna for telephone watch

Abstract

The utility model relates to a GPS circularly polarized antenna for a telephone watch, which comprises a watch casing, a watch display screen arranged on the inner side of the watch casing and a corresponding watch mainboard, and a first antenna branch knot and an L-shaped second antenna branch knot which are coupled with each other are arranged on the outer side surface of the watch casing. The first antenna branch knot is provided with an antenna feeding point, the second antenna branch knot is provided with an antenna feeding point, the antenna feeding point and the antenna feeding point are respectively connected to the watch mainboard through corresponding electric elastic sheets, one L side of the first antenna branch knot is parallel to one L side of the second antenna branch knot, and the other L side of the second antenna branch knot is parallel to the other L side of the first antenna branch knot. And the second antenna branch knot is perpendicular to the other L side of the second antenna branch knot, so that horizontal and vertical polarization current signals are formed, horizontal and vertical polarization requirements can be considered, and the GPS antenna can meet the performance requirement of circular polarization. According to the utility model, the requirement of high performance of the antenna can be met, and GPS positioning can be more accurate and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna positioning, in particular to a GPS circular polarization antenna used for a telephone watch. Background Art

[0002] The GPS positioning antennas of existing consumer electronic communication products usually have built-in linear polarization (vertical / horizontal) antennas. For example, conventional PIFA, monopole and other antenna forms are linearly polarized, that is, horizontally or vertically polarized antennas. Although they can meet higher antenna performance requirements, horizontally or vertically polarized antennas can only receive corresponding horizontally or vertically polarized signals respectively, so their anti-interference and stability are not strong; secondly, GPS ceramic antennas (planar antennas) can meet the GPS circular polarization performance, that is, they can receive horizontal and vertical polarization signals at the same time, making GPS positioning more advantageous in anti-interference and stability, but ceramic antennas are relatively expensive and have basically no application value in consumer electronic products such as mobile phones and watches. Utility Model Content

[0003] The purpose of the utility model is to overcome the problems existing in the prior art and provide a GPS circularly polarized antenna for a telephone watch, which can not only meet the high performance requirements of the antenna, but also make the GPS positioning more accurate and stable.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] A GPS circularly polarized antenna for a telephone watch comprises a watch case, a watch display screen arranged inside the watch case and a corresponding watch mainboard, wherein a first antenna branch and an L-shaped second antenna branch coupled to each other are arranged on the outer side of the watch case, an antenna feeding point is arranged on the first antenna branch, and an antenna feeding ground point is arranged on the second antenna branch, wherein the antenna feeding point and the antenna feeding ground point are respectively connected to the watch mainboard through corresponding electric springs, and the first antenna branch is parallel to one L side of the second antenna branch and perpendicular to the other L side of the second antenna branch to form horizontally and vertically polarized current signals.

[0006] Furthermore, the second antenna branch includes a first radiating portion parallel to the first antenna branch and a second radiating portion vertically connected to the first radiating portion, and the second radiating portion is vertically coupled to the first antenna branch.

[0007] Furthermore, the second radiating portion extends toward a side where the first antenna branch is provided, and an antenna feeding point is provided at the end of the second radiating portion, and an antenna feeding point is provided at an end of the first antenna branch close to the second radiating portion.

[0008] Furthermore, the watch case is a rectangular ring structure with rounded corners, a portion of the first antenna branch and the antenna feeding point are located on the arc segment of the watch case, and the second radiating portion, part of the first radiating portion and the antenna feeding point of the second antenna branch are located on the arc segment of the watch case.

[0009] Furthermore, the first antenna branch and the second antenna branch are laser engraved onto the outer surface of the watch case by LDS process.

[0010] The beneficial effects of the utility model are:

[0011] Under the dual-feed point structure of the antenna of the utility model, two antenna branches are respectively extended to generate horizontal and vertical polarized currents, and the two current signals are perpendicular to each other in time, space and phase, so that the horizontal and vertical polarization requirements can be taken into account, so that the GPS antenna can meet the performance requirements of circular polarization, which can not only meet the high performance requirements of the antenna, but also make GPS positioning more accurate and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the main structural diagram of the utility model;

[0013] Figure 2 It is a side structural diagram of the utility model;

[0014] Figure 3 It is a passive efficiency diagram of the antenna of the utility model tested in the arm state;

[0015] Figure 4 This is a circular polarization performance diagram of the antenna of the present utility model.

[0016] Explanation of the numbers in the figure: 1. watch case, 2. watch display, 3. first antenna branch, 4. second antenna branch, 41. first radiating part, 42. second radiating part, 5. antenna feeding point, 6. antenna feeding point. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0018] like Figure 1 and Figure 2As shown, a GPS circularly polarized antenna for a telephone watch comprises a watch case 1, a watch display screen 2 and a corresponding watch mainboard arranged on the inner side of the watch case 1, wherein the watch mainboard is located on the back of the watch display screen 2 and is packaged through corresponding shell materials. A coupled first antenna branch 3 and an L-shaped second antenna branch 4 are provided on the outer side of the watch case 1, an antenna feeding point 5 is provided on the first antenna branch 3, and an antenna feeding point 6 is provided on the second antenna branch 4. The antenna feeding point 5 and the antenna feeding point 6 are respectively connected to the watch mainboard through corresponding electric springs, and the first antenna branch 3 is parallel to one L side of the second antenna branch 4 and perpendicular to the other L side of the second antenna branch 4 to form horizontally and vertically polarized current signals.

[0019] The second antenna branch 4 includes a first radiating portion 41 parallel to the first antenna branch 3 and a second radiating portion 42 vertically connected to the first radiating portion 41 . The second radiating portion 42 is vertically coupled to the first antenna branch 3 .

[0020] The second radiating portion 42 extends toward a side where the first antenna branch 3 is provided, and an antenna feeding point 6 is provided at the end of the second radiating portion 42, and an antenna feeding point 5 is provided at one end of the first antenna branch 3 close to the second radiating portion 42. The specific width and length dimensions of the first antenna branch 3 and the second antenna branch 4 can be adjusted as needed so that the two signals resonate around 1575.42 MHZ.

[0021] The watch case 1 is a rectangular ring structure with rounded corners, made of plastic. A portion of the first antenna branch 3 and the antenna feeding point are located on the arc segment of the watch case 1, and the second radiating portion 42, a portion of the first radiating portion 41 and the antenna feeding point of the second antenna branch 4 are located on the arc segment of the watch case 1.

[0022] The first antenna branch 3 and the second antenna branch 4 are laser engraved onto the outer surface of the watch case 1 by LDS process.

[0023] In the antenna microwave darkroom test system, test the GPS antenna efficiency and calculate the circular polarization performance parameters:

[0024] 1. The passive efficiency of this antenna is tested in the arm state, such as Figure 3 As shown;

[0025] 2. The circular polarization performance calculation results of this antenna are as follows: Figure 4 As shown;

[0026] from Figure 3 and Figure 4It can be seen that the efficiency of this GPS circularly polarized antenna 1575MHZ is -10.5dB, which meets the higher efficiency requirements of the antenna; the hemispheric right-hand directivity coefficient is 79%, which is much greater than 50%, indicating that the right-hand polarization is better and meets the performance requirements of the circular polarization of the watch GPS. The above two better parameters can make GPS positioning more accurate and stable.

[0027] In addition, it should be noted that, unless otherwise specified or indicated, the terms "first", "second", etc. in the specification are only used to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0028] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A GPS circularly polarized antenna for a telephone watch, comprising a watch housing (1), a watch display screen (2) arranged inside the watch housing (1) and a corresponding watch mainboard, characterized in that: A coupled first antenna branch (3) and an L-shaped second antenna branch (4) are provided on the outer side of the watch housing (1); an antenna feeding point (5) is provided on the first antenna branch (3); an antenna feeding point (6) is provided on the second antenna branch (4); the antenna feeding point (5) and the antenna feeding point (6) are connected to the watch mainboard via corresponding electric springs; the first antenna branch (3) is parallel to one L side of the second antenna branch (4) and perpendicular to the other L side of the second antenna branch (4) to form horizontally and vertically polarized current signals.

2. The GPS circularly polarized antenna for a phone watch according to claim 1, characterized in that: The second antenna branch (4) comprises a first radiating portion (41) parallel to the first antenna branch (3), and a second radiating portion (42) vertically connected to the first radiating portion (41); the second radiating portion (42) is vertically coupled to the first antenna branch (3).

3. The GPS circularly polarized antenna for a phone watch according to claim 2, characterized in that: The second radiating portion (42) extends towards a side where the first antenna branch (3) is provided, and an antenna feeding point (6) is provided at the end of the second radiating portion (42), and an antenna feeding point (5) is provided at an end of the first antenna branch (3) close to the second radiating portion (42).

4. The GPS circularly polarized antenna for a phone watch according to claim 3, characterized in that: The watch case (1) is a rectangular ring structure with arcs at each corner; a portion of the first antenna branch (3) and an antenna feeding point are located on the arc segment of the watch case (1); and a second radiating portion (42), a portion of the first radiating portion (41) and an antenna feeding point of the second antenna branch (4) are located on the arc segment of the watch case (1).

5. The GPS circularly polarized antenna for a phone watch according to claim 4, characterized in that: The first antenna branch (3) and the second antenna branch (4) are laser engraved onto the outer surface of the watch housing (1) by using the LDS process.

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