CN111541013A - Method for improving performance of electrically small antenna for human body center wireless communication network and formed electrically small antenna structure - Google Patents

Abstract

The invention discloses a method for improving the performance of an electrically small antenna for a human body center wireless communication network and an electrically small antenna structure formed by the method. Filling a filling material with high dielectric constant and low conductivity in a certain space around the electrically small antenna to surround and seal the electrically small antenna so as to realize the effects of improving the transmission efficiency of the electrically small antenna, expanding the working bandwidth and reducing the transmission loss; and the wave-transparent material is used as a shell of the package at the periphery of the filling space, so that the small electric antenna and the filling material are fixed. The electronic sensing equipment is arranged in the central area inside the shell, and the interlayer space between the electronic sensing equipment and the shell is a continuous space wrapped on the periphery of the electronic sensing equipment, so that under the limited volume, the electronic sensing equipment and the small electric antenna are integrated, and the occupied space of the filling material is increased to the maximum extent, so that the radiation efficiency and the receiving efficiency of the small electric antenna are improved to the maximum extent, the working bandwidth is expanded, and the transmission loss is reduced.

Description

A method for improving the performance of an electrically small antenna for a body-centered wireless communication network and the formed electrically small antenna structure

technical field

The invention belongs to the field of communication technology, and in particular relates to a method for improving the performance of an electric small antenna for a human body-centered wireless communication network and the formed electric small antenna structure.

Background technique

The so-called electric small antenna refers to the antenna whose physical size is less than 1/2π or 1/10 of the working wavelength. The reduction of the physical size of the electric small antenna relative to the radio wave limits its radio performance, so the electric small antenna usually has low radiation efficiency and works. The disadvantages of narrow bandwidth and high transmission loss.

The human body-centered wireless communication network is a wireless communication network that uses the human body as the center and uses electronic sensing equipment implanted or worn on the human body to monitor and transmit body sign information. Its main application scenarios are medical imaging and health detection. Sensor devices used in body-centric wireless communication networks can be divided into in vitro wearable devices integrated on clothing and in vivo implantable devices in capsule form; both have the characteristics of small size and imperceptibility. Due to device size limitations, the communication antennas mounted on these two types of devices are all electrically small antennas. Obviously, this is detrimental to the communication efficiency and stability between devices within the system.

The key of the antenna body-centered wireless communication system is to achieve efficient and stable transmission between the inside and outside of the human body, which requires the transmitting and receiving antennas of the device to have high radiation efficiency, large operating frequency bandwidth and low transmission loss, while Therefore, to achieve stable and efficient communication between human bodies, it is necessary to achieve the goal of increasing the electrical length of the antenna without changing the physical size of the electrically small antenna, thereby improving the efficiency of the antenna, expanding the working bandwidth, and reducing transmission loss.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a method for improving the performance of an electrically small antenna for a human body-centered wireless communication network and the formed electrically small antenna structure. The effect of improving the transmission efficiency of the antenna, expanding the working bandwidth and reducing the transmission loss is achieved, and has the advantages of simple thinking, strong versatility, low process requirements and low cost.

The present invention is achieved through the following technical solutions:

A method for improving the performance of an electric small antenna for a wireless communication network in the center of the human body. Filling the space around the electric small antenna with a high dielectric constant and low conductivity filling material, enclosing and sealing the electric small antenna, and filling the space. The outer shell is packaged with a wave-transmitting material.

In the above technical solution, the filling material is a liquid or solid material with high dielectric constant and low electrical conductivity. Further, the filling materials include but are not limited to liquid materials such as deionized water and glycerin, and solid materials such as polymer molecular materials with high dielectric constant and low conductivity.

An electrically small antenna structure includes an electrically small antenna, an electronic sensing device, a housing and a filling material, the electronic sensing device is located inside the housing, and there is a sandwich space between the electronic sensing device and the housing, and the electrically small antenna is embedded in the housing. Packed in the interlayer space, and filled with the filler material in the interlayer space.

In the above technical solution, the filling material is a material with high dielectric constant and low electrical conductivity.

In the above technical solution, the outer shell adopts a wave-transmitting material.

In the above technical solution, the electronic sensing device is arranged in the central area inside the housing, and the interlayer space between the electronic sensing device and the housing is a continuous space wrapped around the periphery of the electronic sensing device. Under the same volume, it not only integrates electronic sensing equipment and electric small antenna, but also maximizes the space occupied by the filling material, so that the filling material forms a large-volume hollow inclusion. The performance of electrical conductivity can maximize the radiation efficiency and receiving efficiency of the electric small antenna, expand the working bandwidth, and reduce the transmission loss.

The advantages and beneficial effects of the present invention are:

1. The present invention improves the radiation efficiency and receiving efficiency of the electric small antenna, expands the working bandwidth of the electric small antenna, and reduces the transmission loss of the electric small antenna.

2. The method of using external high dielectric constant material around the small electric antenna to increase its electric size proposed by the present invention is simple in thinking, simple in manufacture, low in technological requirements, and greatly reduces the cost and difficulty of manufacture.

3. The present invention achieves the effect of increasing the electrical size of the antenna without changing the overall physical size of the electrical small antenna and the electronic sensing device, saves the precious space of the equipment, and is beneficial to the integration of the wireless communication equipment in the center of the human body. miniaturization and miniaturization.

4. The method of the present invention has good versatility and practicability, can effectively improve the radio performance of various structural electric small antennas in the human body center wireless wireless communication system, and is suitable for the antenna of the body center wireless communication in-body device and the antenna of the external device, The receiving antenna and the transmitting antenna are suitable for the wireless communication equipment in the center of the human body.

Description of drawings

FIG. 1 is a schematic structural diagram formed by a method for improving the performance of an electrically small antenna according to Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of a structure of an electrically small antenna according to Embodiment 2 of the present invention.

in:

1: Electric small antenna, 2: Shell, 3: Filling material, 4: Electronic sensing device.

For those of ordinary skill in the art, other related drawings can be obtained from the above drawings without any creative effort.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions of the present invention are further described below with reference to specific embodiments.

Example 1

In this embodiment, a dipole electric small antenna is used as an example to explain. Fill the filling material 3 with high dielectric constant and low conductivity, and enclose and seal the small electric antenna to achieve the effect of improving the transmission efficiency of the electric small antenna, expanding the working bandwidth, and reducing the transmission loss; The material is used as the casing 2 of the package, which plays the role of fixing the small electric antenna and filling material, and also plays the role of isolating other electronic devices in the device to avoid interference.

Further, the filling materials mentioned in the above method are liquid or solid materials with high dielectric constant and low electrical conductivity, including but not limited to liquid materials such as deionized water and glycerin, and polymers with high dielectric constant and low electrical conductivity. solid materials such as biomolecular materials.

Further, the method shown in this example is not only suitable for antennas with simple structures such as electric dipole antennas, but also for antennas with various complex structures such as conformal antennas. Since the structures of various types of antennas are different, the method proposed in the present invention should be changed in practical application, that is, the space filled with materials for antennas with different structures should also be changed accordingly to adapt to the shape and structure of the antenna , For example, a dipole antenna can be packaged in a cuboid or cylinder that is slightly larger than the antenna itself, while a complex antenna needs to use a larger package to cover the entire antenna, so as to achieve the best balance between the antenna volume and the electrical performance of the antenna. Maximize efficiency.

Further, the selection and application of filling materials with high dielectric constant and low conductivity in this method are not unique, and corresponding selections should be made according to the actual situation. Taking the capsule sensor as an example, in actual use, a sandwich layer can be set in the capsule sensor shell, and the antenna and filling material can be placed. Deionized water or glycerol can be chosen as filler material in this application. Deionized water and glycerin have high relative permittivity and low electrical conductivity, which can effectively increase the electrical length of the electric small antenna; at the same time, deionized water and glycerin are common materials that are extremely easy to prepare, which greatly reduces the technological difficulty and production cost. , this method has extremely high practicability. In some other special application scenarios, microwave solid materials with high dielectric constant can be selected to achieve better results.

Embodiment 2

Referring to FIG. 2 , on the basis of the first embodiment, this embodiment provides an electric small antenna structure, which includes an electric small antenna 1 , an electronic sensing device 4 , a casing 2 and a filling material 3 , and the electronic sensing device is located in the casing. Inside, and between the electronic sensing device and the housing, there is an interlayer space in which the electrically small antenna is embedded, and the interlayer space is filled with the filling material.

The filling material adopts a material with high dielectric constant and low electrical conductivity.

The shell is made of wave-transmitting material.

Further, the electronic sensing device is arranged in the central area inside the housing, and the interlayer space between the electronic sensing device and the housing is a continuous space wrapped around the periphery of the electronic sensing device, which has the advantage of: in a limited volume It not only integrates electronic sensing equipment and electric small antenna, but also maximizes the space occupied by the filling material, so that the filling material forms a large-volume hollow inclusion, and because the filling material itself has high dielectric constant and low conductivity Therefore, the radiation efficiency and receiving efficiency of the electric small antenna are maximized, the working bandwidth is expanded, and the transmission loss is reduced.

For ease of description, spatially relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to describe how one element or feature shown in the figures is relative to another element or feature. relation. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both upper and lower positions. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative references used herein interpreted accordingly.

Moreover, relational terms such as "first" and "second" etc. are only used to distinguish one element from another having the same name and do not necessarily require or imply any such actual existence between those elements relationship or order.

The present invention has been exemplarily described above. It should be noted that, without departing from the core of the present invention, any simple deformation, modification, or other equivalent replacements that can be performed by those skilled in the art without any creative effort fall into the scope of the present invention. the scope of protection of the invention.

Claims (7)

1. a kind of method that is used for human body center wireless communication network to promote the performance of electric small antenna, it is characterized in that: fill the filling material of high dielectric constant, low electrical conductivity in the space around electric small antenna, enclose and seal the electric small antenna , and use the wave-transmitting material as the encapsulation shell on the periphery of the filling space. 2 . The method for improving the performance of an electrically small antenna for a body-centered wireless communication network according to claim 1 , wherein the filling material is a liquid or solid material with high dielectric constant and low conductivity. 3 . 3. The method according to claim 2, characterized in that: the filling materials include but are not limited to liquid materials such as deionized water, glycerin, and high dielectric constant, low Conductivity of polymer molecular materials and other solid materials. 4. An electric small antenna structure, characterized in that it comprises an electric small antenna, an electronic sensing device, a housing and a filling material, the electronic sensing device is located inside the housing, and there is a sandwich space between the electronic sensing device and the housing, so the The electric small antenna is embedded in the interlayer space, and the filling material is filled in the interlayer space. 5 . The electrically small antenna structure according to claim 4 , wherein the filling material is a material with high dielectric constant and low conductivity. 6 . 6 . The electric small antenna structure according to claim 4 , wherein the outer casing is made of a wave-transmitting material. 7 . 7. The electric small antenna structure according to claim 4, characterized in that: the electronic sensing device is arranged in the central area inside the shell, and the interlayer space between the electronic sensing device and the shell is a continuous package wrapped in the electronic sensing device. The space around the device.

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