TWI707503B - Wearable broadband fabric patch antenna - Google Patents

Abstract

A wearable broadband fabric patch antenna includes: a substrate, a radiating element and a grounding element; wherein the radiating element is thermally attached to the top surface of the substrate, the radiating element is provided with a quadrangular patch, and one side of the patch It has a signal feed-in end, the signal feed-in end is provided with an opening, the signal feed-in end is provided with an extension post in the center of the opening, and one end of the extension post extends toward the edge of the substrate; the grounding member is thermally attached to the substrate On the bottom surface, the grounding member is carved with a complementary split resonance ring slot (CSRR), and three C-shaped rings are formed. The complementary split resonant ring slot structure increases the resonance frequency point so that the newly added resonance frequency is close to the resonant frequency of the patch, thereby increasing (broadening) the bandwidth of transmitting and receiving signals.

Description

Wearable broadband fabric patch antenna

The present invention is a wearable broadband fabric patch antenna, in particular a wearable fabric patch antenna with broadband transmitting and receiving signal effects.

By the way, as modern people pay more and more attention to the quality of life and the aging factors of the population, many home-type simple medical devices or wearable physiological sensing devices have also emerged as the times require, which can be applied to the medical care and physiology of the elderly Surveillance, or used for the sensing of physiological conditions such as breathing, heartbeat, exercise posture or calorie consumption during exercise. The detection data needs to be transmitted wirelessly, so an antenna is required.

The traditional printed circuit board (PCB) antenna is quite hard, cannot be bent, is not suitable for wearing on the body, easily protrudes out of the clothing, and cannot be washed, causing a lot of inconvenience in use. Therefore, it is necessary to design a wearable fabric antenna. The patch antenna is suitable for fabric antenna structure due to its low profile structure, simple shape and easy design. However, the main shortcoming of patch antennas is narrow frequency, and its bandwidth is generally less than 5%, and its bandwidth needs to be increased to meet the requirements of broadband wireless communication.

It can be seen that there are still many deficiencies in the above-mentioned conventional items, and they are not a good designer, and urgently need to be improved.

In view of this, the inventor of this case has been engaged in the manufacturing, development and design of related products for many years. Aiming at the above-mentioned goals, after detailed design and careful evaluation, he finally obtained a practical invention.

The object of the present invention is to provide a wearable broadband fabric patch antenna, which has the effect of broadband transmitting and receiving signals.

According to the above objective, the wearable broadband fabric patch antenna of the present invention mainly includes: a substrate, a radiating element and a grounding element; wherein the substrate is composed of neoprene fiber; the radiating element is thermally attached Attached to the top surface of the substrate, the radiating element is composed of conductive fiber cloth made of metal-plated polyester fiber, and the radiating element is provided with a quadrangular patch. One side of the patch has a signal feeding end, and the signal feeding The input end is provided with an opening, the signal feed end is provided with an extension post at the center of the opening, one end of the extension post is electrically connected to the signal feed end, and the other end extends toward the edge of the substrate; the grounding member is thermally attached to the On the bottom surface of the substrate, the grounding piece is made of conductive fiber cloth made of metal-plated polyester fiber. The grounding piece is carved with Complement Split Ring Resonator (CSRR), forming three C-shaped rings , One of the inner rings is located in a middle ring, and the middle ring is also located in an outer ring; thereby, through the complementary split resonance ring slot (CSRR) structure to increase the resonance frequency point, the new resonance frequency is close to the sticker The resonant frequency of the chip can increase (broaden) the bandwidth of transmitting and receiving signals, so that the signal bandwidth can reach 23.3%, and the gain is 5.04 dBi.

In order to facilitate your reviewers to have a further understanding and understanding of the purpose, shape, features and effects of the structure of the present invention, a detailed description is provided as follows:

The present invention relates to a "wearable broadband fabric patch antenna". Please refer to Figures 1 and 2. The wearable broadband fabric patch antenna of the present invention mainly includes: a substrate 10 and a radiating element 20 And a grounding piece 30.

Wherein, the substrate 10 is made of neoprene fiber.

The radiating element 20 is thermally bonded to the top surface of the substrate 10. The radiating element 20 is composed of conductive fiber cloth made of metal-plated polyester fiber. The radiating element 20 is provided with a quadrangular patch 21. The patch 21 One side has a signal feeding end 22, the signal feeding end 22 is provided with an opening 23, the signal feeding end 22 is provided with an extension post 24 at the center of the opening 23, and one end of the extension post 24 is electrically connected to the signal feed The end 22 and the other end extend toward the edge of the substrate 10.

The grounding member 30 is thermally bonded to the bottom surface of the substrate 10. The grounding member 30 is composed of conductive fiber cloth composed of metal-plated polyester fiber. The grounding member 30 is engraved with a complementary split resonance ring slot 31 (Complement Split The Ring Resonator, referred to as CSRR), is formed with three C-shaped rings, of which an inner ring 311 is located in a middle ring 312, and the middle ring 312 is located in an outer ring 313.

With the composition of the above components, please refer to Figures 1, 2, 3, 4, 5, 6 again, through the complementary split resonance ring slot 31 (CSRR) structure to increase the resonance frequency point, so that the new resonance frequency is close to the The resonant frequency of patch 21 can increase (broaden) the bandwidth of transmitting and receiving signals. The bandwidth can reach 23.3%, which is much larger than that of traditional patch antennas (conventional patch antennas are <5%), and the gain is 5.04 dBi (as shown in Figures 3, 4, 5, and 6).

In this way, the substrate 10 can be sewn on clothing, as a wearable fabric patch antenna, has the advantages of light weight, bendable and washable, and is very suitable for wearable purposes.

Please refer to Figure 3, which is the simulation and measurement result of the antenna return loss of the wearable broadband fabric patch antenna of the present invention.

Please refer to Figure 4, which is the antenna of the wearable broadband fabric patch antenna of the present invention: E-plane, H-plane 2.16GHz simulation and measurement field radiation pattern; among them, the E-plane on the left is The radiation pattern of the E plane, and the H-plane on the right is the radiation pattern of the H plane.

Please refer to Figure 5, which is the antenna of the wearable broadband fabric patch antenna of the present invention: E-plane, H-plane 2.5GHz simulation and measurement field radiation pattern; among them, the E-plane on the left is The radiation pattern of the E plane, and the H-plane on the right is the radiation pattern of the H plane.

Please refer to Figure 6, which is the antenna of the wearable broadband fabric patch antenna of the present invention: E-plane, H-plane 2.73GHz simulation and measurement field radiation pattern; where, E-plane on the left is The radiation pattern of the E plane, and the H-plane on the right is the radiation pattern of the H plane.

Referring back to Figures 1 and 2, the substrate 10 is made of neoprene fiber, with a thickness of 4 mm and a dielectric constant of 1.5.

Please refer to Figures 1 and 2 again. The neoprene fiber is a diving cloth with soft hand feeling, shockproof, thermal insulation, elasticity, impermeable and airtight characteristics.

Please refer to Figures 1 and 2 again. The diving cloth includes Jersey, Lycra, Megacloth, Terry, Polyester or Nylon.

As shown in Figures 1 and 2, the radiating element 20 is made of conductive fiber cloth made of polyester fiber coated with copper and nickel.

Referring back to Figures 1 and 2, the grounding member 30 is made of conductive fiber cloth made of polyester fiber coated with copper and nickel.

Refer to Figures 1 and 2 again, the size of the complementary split resonance ring slot 31 is increased, and the impedance bandwidth and depth of the resonance mode are increased. After increasing to 65 mm, the best impedance matching can be achieved, which can be smooth Excite the three resonance modes of the passband, respectively falling at 2.36 GHz, 2.55 GHz and 2.9 GHz, which can achieve a wideband effect.

In summary, the wearable broadband fabric patch antenna of the present invention does have an unprecedented innovative structure. It has not been seen in any publications, and there is no similar product on the market. In addition, the unique features and functions of the present invention are far from comparable with conventional ones, and a patent application is filed.

The above are only the best specific embodiments of the present invention, but the structural features of the present invention are not limited thereto. Any change or modification that can be easily thought of by anyone familiar with the art in the field of the present invention can be covered In the following patent scope of this case.

10: substrate 20: Radiation parts 30: Grounding piece 21: Patch 22: Signal input terminal 23: opening 24: Extension column 31: Complementary split resonance ring slot 311: Inner Ring 312: Central 313: Outer Ring

Figure 1 is a schematic diagram of the appearance of the wearable broadband fabric patch antenna of the present invention. Figure 2 is a schematic diagram of the appearance of the upper and lower layers of the wearable broadband fabric patch antenna of the present invention. Figure 3 is a data schematic diagram of the return loss simulation and measurement results of the wearable broadband fabric patch antenna of the present invention. Figures 4, 5, and 6 are the radiation field patterns when the wearable broadband fabric patch antenna of the present invention is used.

10: substrate

20: Radiation parts

30: Grounding piece

21: Patch

22: Signal input terminal

23: opening

24: Extension column

Claims (7)

A wearable broadband fabric patch antenna, comprising: a substrate, the substrate is composed of neoprene fiber, the substrate is composed of neoprene fiber, the neoprene fiber is a diving cloth, the substrate dielectric constant is 1.5; A radiating element, the radiating element is thermally attached to the top surface of the substrate, the radiating element is composed of conductive fiber cloth made of metal-plated polyester fiber, the radiating element is provided with a quadrangular patch, the paste One side of the sheet has a signal feeding end, the signal feeding end is provided with an opening, and the signal feeding end is provided with an extension post at the center of the opening. One end of the extension post is electrically connected to the signal feed end, and the other end faces the The edge of the substrate extends; and a grounding piece, the grounding piece is thermally bonded to the bottom surface of the substrate, the grounding piece is composed of conductive fiber cloth composed of metal-plated polyester fiber, and the complementary split resonance ring is engraved on the grounding piece The slotted hole (CSRR) is formed with three C-shaped rings, of which an inner ring is located in a middle ring, and the middle ring is located in an outer ring. The wearable broadband fabric patch antenna described in item 1 of the scope of the patent application, wherein the diving cloth includes Jersey, Lycra, Megacloth, Terry, and Polyester ) Or nylon (Nylon). The wearable broadband fabric patch antenna described in item 1 of the scope of patent application, wherein the substrate thickness is 4mm. The wearable broadband fabric patch antenna described in the first item of the scope of patent application, wherein the radiating element is composed of conductive fiber cloth composed of copper-nickel-plated polyester fiber. The wearable broadband fabric patch antenna described in the first item of the scope of patent application, wherein the grounding member is made of conductive fiber cloth composed of copper-nickel-plated polyester fiber. The wearable broadband fabric patch antenna described in the first item of the scope of patent application, wherein the size of the complementary split resonance ring slot is 65mm. Such as the wearable broadband fabric patch antenna described in item 6 of the scope of patent application, in which the complementary split resonance ring slot achieves the best impedance matching, and can smoothly excite the three resonance modes of the passband, which fall at 2.36GHz respectively , 2.55GHz and 2.9GHz.

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