CN109378582B

CN109378582B - Miniaturized wearable antenna

Info

Publication number: CN109378582B
Application number: CN201811409511.3A
Authority: CN
Inventors: 李九生; 严德贤
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2021-02-09
Anticipated expiration: 2038-11-23
Also published as: CN109378582A

Abstract

The invention discloses a miniaturized wearable antenna. The rectangular patch comprises a substrate, a hexagonal patch, a first U-shaped slit, a second U-shaped slit, a third U-shaped slit, a fourth U-shaped slit, a fifth U-shaped slit, a sixth U-shaped slit, a seventh U-shaped slit, an eighth U-shaped slit and a rectangular ground plate; the hexagonal patch is positioned on the front side of the substrate, and the first U-shaped slit, the second U-shaped slit, the third U-shaped slit, the fourth U-shaped slit, the fifth U-shaped slit, the sixth U-shaped slit, the seventh U-shaped slit and the eighth U-shaped slit are respectively arranged in the hexagonal patch from left to right; the rectangular grounding plate is positioned at the back of the substrate. The miniaturized wearable antenna has the advantages of simple structure, small size, good radiation characteristic, low cost and the like, and meets the application requirements in the field of wearable wireless communication.

Description

Miniaturized wearable antenna

Technical Field

The invention relates to the technical field of wearable wireless communication application, in particular to a miniaturized wearable antenna.

Background

As a new antenna in the antenna field, a wearable antenna has characteristics different from a general antenna. First, a wearable antenna is an electronic device that can be embedded in clothing, and has various modifications, and generally speaking, it is made of flexible materials or textile materials, so that the antenna designed in this way can be more easily conformed to the human body, and is relatively portable and easy to carry. Secondly, wearable antennas are one type of conformal antennas, and because they are attached to the surface of the human body, the interaction between them and the human body must also be considered.

The wearable antenna has great application value in the medical field. For example, in the medical field, the antenna, the sensor and the medical equipment can be placed on a human body together, and the detected data is transmitted to the network terminal through the antenna, so that a doctor can monitor the physical state of a patient in real time, and especially, along with the increase of the population of the old in China, the wearable antenna is very expected to serve the medical care of the old. With the deep research, the wearable antenna can be further developed and matured, and has a wide development prospect. However, the existing antenna has the disadvantages of complex structure, large size, difficult manufacture, large loss and poor radiation performance. Therefore, a novel antenna with simple structure, small size, good radiation characteristic and low cost is urgently needed to be researched to meet the requirement of practical application.

Disclosure of Invention

A miniaturized wearable antenna comprises a substrate, a hexagonal patch, a first U-shaped slit, a second U-shaped slit, a third U-shaped slit, a fourth U-shaped slit, a fifth U-shaped slit, a sixth U-shaped slit, a seventh U-shaped slit, an eighth U-shaped slit and a rectangular ground plate; the hexagonal patch is positioned on the front side of the substrate, and a first U-shaped slit, a second U-shaped slit, a third U-shaped slit, a fourth U-shaped slit, a fifth U-shaped slit, a sixth U-shaped slit, a seventh U-shaped slit and an eighth U-shaped slit are sequentially hollowed in the hexagonal patch from left to right; the bottom edge of the hexagonal patch is connected with a handle end which is made of the same material as the hexagonal patch, and the handle end is also positioned on the front side of the substrate; the rectangular grounding plate is positioned at the back of the substrate.

The specific parameters of each component in the above scheme can adopt the following preferred modes.

The substrate is made of polyester materials, the length of the substrate is 32-34 mm, the width of the substrate is 23-25 mm, and the thickness of the substrate is 0.8-1 mm.

The hexagonal patch is characterized in that the length of the six sides of the hexagonal patch in the clockwise direction is respectively 13-15 mm, 16-18 mm, 13-15 mm, 14-16 mm and 2-4 mm from the left side of the handle end, the length of the handle end is 11-13 mm, and the width of the handle end is 2-4 mm.

The first U-shaped slit, the second U-shaped slit, the third U-shaped slit, the fourth U-shaped slit, the fifth U-shaped slit, the sixth U-shaped slit, the seventh U-shaped slit and the eighth U-shaped slit are identical in shape and size, the left and right span is 1-3 mm, the height is 10-12 mm, and the caliber width is 0.5-0.7 mm.

The rectangular grounding plate is 23-25 mm in length and 10-12 mm in width.

The miniaturized wearable antenna has the advantages of simple structure, good radiation characteristic, low cost and the like, and meets the application requirements in the field of wearable wireless communication.

Drawings

Fig. 1 is a front view of a miniaturized wearable antenna;

FIG. 2 is a return loss plot of a miniaturized wearable antenna;

FIG. 3 is an E-plane, H-plane radiation pattern for the antenna at 2.45 GHZ;

FIG. 4 is a surface current plot of the patch at 2.33GHZ for the antenna;

FIG. 5 is a surface current plot of the patch at 2.45GHZ for the antenna;

fig. 6 is a surface current plot of the patch at 2.5GHZ for the antenna.

Detailed Description

As shown in fig. 1 to 6, a miniaturized wearable antenna includes a substrate 1, a hexagonal patch 2, a first U-shaped slit 3, a second U-shaped slit 4, a third U-shaped slit 5, a fourth U-shaped slit 6, a fifth U-shaped slit 7, a sixth U-shaped slit 8, a seventh U-shaped slit 9, an eighth U-shaped slit 10, and a rectangular ground plate 11. The hexagonal patch 2 is attached to the front side of the substrate 1, and a first U-shaped slit 3, a second U-shaped slit 4, a third U-shaped slit 5, a fourth U-shaped slit 6, a fifth U-shaped slit 7, a sixth U-shaped slit 8, a seventh U-shaped slit 9 and an eighth U-shaped slit 10 are sequentially hollowed from left to right on the hexagonal patch 2; the bottom edge of the hexagonal patch 2 is connected with a handle end which is made of the same material as the hexagonal patch 2, and the handle end is also attached to the front position of the substrate 1; the rectangular grounding plate 11 is positioned at the back of the substrate 1, and the bottom edge of the rectangular grounding plate is coincident with the bottom edge of the substrate 1.

The specific parameters of each device are as follows: the substrate 1 is made of polyester materials, the length of the substrate is 32-34 mm, the width of the substrate is 23-25 mm, and the thickness of the substrate is 0.8-1 mm. The hexagonal patch 2 is characterized in that the length of six sides in the clockwise direction is respectively 13-15 mm, 16-18 mm, 13-15 mm, 14-16 mm and 2-4 mm from the first side on the left side of the handle end, the length of the handle end is 11-13 mm, and the width of the handle end is 2-4 mm. The width of the handle end is consistent with the bottom edge of the hexagonal patch 2 connected with the handle end, and the handle end and the hexagonal patch are overlapped. The first U-shaped slit 3, the second U-shaped slit 4, the third U-shaped slit 5, the fourth U-shaped slit 6, the fifth U-shaped slit 7, the sixth U-shaped slit 8, the seventh U-shaped slit 9 and the eighth U-shaped slit 10 are completely the same in shape and size, the 8U-shaped slits are transversely arranged at the same posture at equal intervals, and the U-shaped slits penetrate through the hexagonal patch 2 in the thickness direction. The left and right span of each U-shaped slit is 1-3 mm, the height is 10-12 mm, and the aperture width is 0.5-0.7 mm. The left-right span refers to the maximum transverse distance from the left edge to the right edge of the U-shaped slit in figure 1, the height refers to the maximum vertical distance in the up-down direction of the slit in figure 1, and the caliber refers to the distance between the left edge and the right edge of the part which is not hollowed out in the U-shaped slit. The rectangular grounding plate 11 has a length of 23-25 mm and a width of 10-12 mm.

Example 1

In this embodiment, the structure and the shapes of the components of the miniaturized wearable antenna are as described above, and therefore are not described again. However, the specific parameters of each component are as follows:

the substrate is made of polyester materials, the length of the substrate is 32mm, the width of the substrate is 23mm, and the thickness of the substrate is 0.8 mm. The six sides of the hexagonal patch in the clockwise direction are respectively 13.6mm, 13.11mm, 16.3mm, 13.12mm, 14.7mm and 2.4mm in length, the handle end is 11.3mm in length and 2.4mm in width. The first U-shaped slit, the second U-shaped slit, the third U-shaped slit, the fourth U-shaped slit, the fifth U-shaped slit, the sixth U-shaped slit, the seventh U-shaped slit and the eighth U-shaped slit are completely the same in shape and size, the left and right span is 1.5mm, the height is 10mm, and the caliber width is 0.5 mm. The rectangular grounding plate is 23mm in length and 10.5mm in width, and the long edge of the rectangular grounding plate is completely connected with the bottom edge of the hexagonal patch. Fig. 2 is a return loss diagram of the miniaturized wearable antenna, and it can be seen that the-10 dB bandwidth range of the antenna is 2.33GHZ to 2.45 GHZ. Fig. 3 is an E-plane, H-plane radiation pattern for the antenna at 2.45 GHZ. Fig. 4 is a surface current plot of the patch at 2.33GHZ for the antenna. Fig. 5 is a surface current plot of the patch at 2.45GHZ for the antenna. Fig. 6 is a surface current plot of the patch at 2.5GHZ for the antenna.

Claims

1. A miniaturized wearable antenna is characterized by comprising a substrate (1), a hexagonal patch (2), a first U-shaped slit (3), a second U-shaped slit (4), a third U-shaped slit (5), a fourth U-shaped slit (6), a fifth U-shaped slit (7), a sixth U-shaped slit (8), a seventh U-shaped slit (9), an eighth U-shaped slit (10) and a rectangular ground plate (11); the hexagonal patch (2) is positioned on the front surface of the substrate (1), and a first U-shaped slit (3), a second U-shaped slit (4), a third U-shaped slit (5), a fourth U-shaped slit (6), a fifth U-shaped slit (7), a sixth U-shaped slit (8), a seventh U-shaped slit (9) and an eighth U-shaped slit (10) are sequentially hollowed from left to right on the hexagonal patch (2); the bottom edge of the hexagonal patch (2) is connected with a handle end which is made of the same material as the hexagonal patch (2), and the handle end is also positioned on the front side of the substrate (1); the rectangular grounding plate (11) is positioned at the back of the substrate (1);

the substrate (1) is made of a terylene material, the length of the substrate is 32mm, the width of the substrate is 23mm, and the thickness of the substrate is 0.8 mm;

the hexagonal patch (2) is characterized in that the length of six sides in the clockwise direction from the left side of the handle end is respectively 13.6mm, 13.11mm, 16.3mm, 13.12mm, 14.7mm and 2.4mm, the length of the handle end is 11.3mm, and the width of the handle end is 2.4 mm;

the first U-shaped slit (3), the second U-shaped slit (4), the third U-shaped slit (5), the fourth U-shaped slit (6), the fifth U-shaped slit (7), the sixth U-shaped slit (8), the seventh U-shaped slit (9) and the eighth U-shaped slit (10) are completely the same in shape and size, the left and right span is 1.5mm, the height is 10mm, and the caliber width is 0.5 mm;

the rectangular grounding plate (11) is 23mm in length and 10.5mm in width.