CN209515983U - A kind of wearable arc medium resonator antenna of the TM mode of conformal feed - Google Patents

Abstract

The utility model discloses a TM mode wearable arc-shaped dielectric resonator antenna with conformal feeding, comprising: a dielectric resonator, a floor, a dielectric substrate and a feeder line; the floor conforms to the dielectric resonator, and the dielectric resonator is fixed In the middle of the outer surface of the dielectric substrate, the feeder is located on the upper surface of the dielectric substrate and extends to the side of the dielectric resonator to conform to the dielectric resonator; the inner and outer surfaces of the dielectric substrate are respectively attached to the floor and the dielectric resonator; the antenna is fed by the feeder , and then the electromagnetic wave energy is conducted to the dielectric resonator through the feeder. The utility model has the advantages that: the base plate is a ring structure, which belongs to a wearable structure, and has a wide range of application fields and flexible application scenarios; the conformal structure does not increase the additional section size when adjusting the floor size, and can obtain high gain/wide beam characteristics ; Compared with the microstrip antenna, it has a wider bandwidth; the conformal feeder on the substrate and the dielectric resonator also has the function of assembly alignment, which makes the fabrication and processing easier.

Description

A Conformally Feed TM Mode Wearable Arc Dielectric Resonator Antenna

technical field

The utility model relates to the technical field of conformal wearable antennas, in particular to a conformal feeding TM mode wearable arc-shaped dielectric resonator antenna.

Background technique

With the rapid development of wireless communication technology, emerging communication technologies such as the Internet of Things and Infinity Body Area Network have received more and more attention. People have higher and higher requirements for the portability of wireless communication devices, and various wearable devices emerge in endlessly. This prompts wireless communication devices to develop in the direction of conformality.

At present, research on wearable antennas at home and abroad is mostly based on microstrip antennas, which are mainly made of flexible substrates such as imide, photo paper, polylactic acid and other organic flexible media or flexible textile materials. Copper foil or conductive fabric. Such antennas generally have a small volume and low profile, are mostly attached to clothing, and can better maintain a conformal shape with the human body;

Compared with the microstrip antenna, the dielectric resonator antenna has many advantages such as wide bandwidth, high polarization purity, high degree of design freedom, and multiple radiation modes, which can further meet the performance requirements of the conformal system. However, the dielectric resonator Antennas are not practically used in curved conformal and wearable devices.

Utility model content

Aiming at the defects of the prior art, the utility model provides a conformal feeding TM mode wearable arc-shaped dielectric resonator antenna, which can effectively solve the above-mentioned problems existing in the prior art.

In order to realize above utility model purpose, the technical scheme that the utility model takes is as follows:

A conformally fed TM mode wearable arc-shaped dielectric resonator antenna, comprising: a dielectric resonator 1, a feeder 2, a dielectric substrate 3 and a floor 4;

The floor 4 is conformal to the dielectric resonator 1, the dielectric resonator 1 is fixed in the middle of the outer surface of the dielectric substrate 3, and the material of the floor 4 is copper foil;

The inner and outer surfaces of the dielectric substrate 3 are attached to the covering floor 4 and the dielectric resonator 1 respectively;

The antenna is fed by a feeder 2 , which is located on the upper surface of the dielectric substrate 3 and extends to the side of the dielectric resonator 1 to conform to the dielectric resonator 1 . Electromagnetic wave energy is transmitted to the dielectric resonator 1 through the feeder 2 .

The dielectric substrate 3 is made of ceramics, the relative permittivity of the dielectric substrate 3 is 5.8, and the dielectric substrate 3 is a closed loop for wearing on the arm.

Further, the dielectric resonator 1 is made of alumina ceramic material with a relative permittivity of 12.3, an inner diameter of 40 mm, a thickness of 10 mm, a radian of 60 degrees, and a width of 27 mm.

Further, the dielectric substrate 3 has a thickness of 2 mm, an inner diameter of 38 mm, and a width of 60 mm.

Further, the width of the floor 4 and the ring-shaped dielectric base plate 3 are consistent at 60 mm, and the arc is 80 degrees.

Further, the feeder 2 is a copper microstrip line, and the feeder 2 is divided into two parts on the dielectric substrate 3 and on the dielectric resonator 1; the width of the feeder 2 on the dielectric substrate 3 is 5.64mm, and the length is 16.5mm, and the dielectric resonator 1 The conformal feeder 2 section has a width of 5.00mm and a height of 9.52mm.

Compared with the prior art, the utility model has the advantages of:

1. It adopts a closed ring-shaped dielectric substrate suitable for human wrist size, which is suitable for wearable devices.

2. Both the floor and the dielectric resonator are conformal to the dielectric substrate and can be applied to curved surfaces. The conformal structure enables the wide beam requirements, low backlobe, and high Performance requirements such as gain can also be adjusted by this method.

3. When feeding the antenna, the feed line is divided into two parts, and the feed line part on the surface of the dielectric substrate also has the function of assembly, alignment and calibration, which makes the production and processing easier.

4. The antenna is designed based on a dielectric resonator antenna, and the overall structure is simple. The floor, dielectric substrate and dielectric resonator all participate in radiation. Compared with the traditional microstrip antenna, it has a wider bandwidth.

Description of drawings

Fig. 1 is the global view of antenna of the utility model example;

Fig. 2 is a top view of the utility model example antenna;

Fig. 3 is a side view of the utility model example antenna;

Fig. 4 is a curve diagram of the port reflection coefficient when the utility model example antenna respectively obtains low backlobe, wide beam and high gain performance under different floor radian sizes;

Fig. 5 is the E plane (width direction) pattern at the resonant frequency point when the utility model example antenna obtains low backlobe, wide beam and high gain performance under different floor radian sizes;

Fig. 6 is the H plane (radian direction) direction diagram at the resonant frequency point when the utility model example antenna obtains low backlobe, wide beam and high gain performance under different floor radian sizes;

Fig. 7 is the simulation result of the E plane/H plane pattern of the utility model example antenna at the resonant frequency point (2.45GHz);

Fig. 8 is a top view of the magnetic field distribution inside the dielectric resonator when the example antenna of the present invention is at the resonant frequency point (2.45 GHz).

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, a conformally fed TM mode wearable arc-shaped dielectric resonator antenna includes: a dielectric resonator 1, a feeder 2, a dielectric substrate 3 and a floor 4;

The floor 4 is conformal to the dielectric resonator 1, the dielectric resonator 1 is fixed in the middle of the outer surface of the dielectric substrate 3, and the material of the floor 4 is copper foil;

The inner and outer surfaces of the dielectric substrate 3 are attached to the covering floor 4 and the dielectric resonator 1 respectively;

The antenna is fed by a feeder 2 . The feeder 2 is located on the upper surface of the dielectric substrate 3 and extends to the side of the dielectric resonator 1 . Electromagnetic wave energy is conducted to the dielectric resonator 1 through the feeder 2 .

Further, the dielectric resonator 1 is made of alumina ceramic material with a relative permittivity of 12.3, an inner diameter of 40 mm, a thickness of 10 mm, a radian of 60 degrees, and a width of 27 mm.

Further, the dielectric substrate 3 is made of ceramic material, the relative dielectric constant of the dielectric substrate 3 is 5.8, and the thickness is 2 mm. The dielectric substrate 3 is a closed loop with an inner diameter of 38 mm and a width of 60 mm.

Further, the width of the floor 4 is consistent with that of the annular dielectric substrate 3 at 60 mm, the floor is symmetrical about the XOZ plane, and the arc is Phig=80 degrees.

Further, the feeder 2 is a copper microstrip line, and the feeder 2 is divided into two parts on the dielectric substrate 3 and the dielectric resonator 1; the width of the feeder 2 on the dielectric substrate 3 is n=5.64mm, and the length is m=16.5mm, and The width of the part of the feeder 2 conformal to the dielectric resonator 1 is w=5.00 mm, and the height is l=9.52 mm. Therefore, the antenna is well matched with the feed structure and works in TM mode.

Fig. 4 is a comparison diagram of the port S parameter curves of the utility model example antenna at different floor radian sizes, and the resonant frequency point is 2.45 GHz; it can be seen that the wearable arc-shaped dielectric resonator antenna with conformal feeding is different Under the floor size, it has a wide bandwidth.

Figure 5 and Figure 6 are the E-plane (width direction) and H-plane (radian direction) direction diagrams of the resonant frequency points of the example antenna of the present invention when the base plate size is different. It can be seen that the main radiation direction of the antenna is 6.662dBi when Phig=250 degrees, and the requirements of wide beam or low backlobe can also be met by adjusting the size of the floor.

Fig. 7 is the E-plane/H-plane pattern of the example antenna of the present invention at the resonant frequency point. It can be seen that the antenna has better linear polarization performance and lower cross-polarization level.

Fig. 8 is a distribution diagram of the magnetic field inside the dielectric resonator when the antenna of the example antenna of the present invention is at the resonant frequency point (2.45 GHz), and it can be seen that the antenna works in the TM ^X _11δ mode.

In the example of the utility model, the dielectric resonator is glued on the closed-loop dielectric substrate, and the conformal feeder on one side of the dielectric resonator is connected and combined with the feeder on the dielectric substrate, so that the antenna and the feeder structure are well matched. At the same time, it also has the function of assembly alignment; the floor and the dielectric substrate are conformal, so that the floor size still has a large adjustment space without additional increase in the antenna profile, so as to obtain requirements such as high gain or wide beam.

Those of ordinary skill in the art will appreciate that the above descriptions are all preferred embodiments of the present utility model, which are intended to further illustrate the present utility model, rather than limit it, and should be understood as the protection scope of the present utility model It is not intended to be limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the technical revelations disclosed in the utility model without departing from the essence of the utility model, and these variations and combinations should all be within the protection scope of the utility model.

Claims (4)

1. A TM mode wearable arc dielectric resonator antenna of conformal feeding, is characterized in that, comprises: dielectric resonator (1), feeder (2), dielectric substrate (3) and floor (4); The floor (4) is conformal to the dielectric resonator (1), the dielectric resonator (1) is fixed in the middle of the outer surface of the dielectric substrate (3), and the material of the floor (4) is copper foil; The inner and outer surfaces of the dielectric substrate (3) are attached to the covering floor (4) and the dielectric resonator (1) respectively; The antenna is fed by a feeder (2), the feeder (2) is located on the upper surface of the dielectric substrate (3), and extends to the side of the dielectric resonator (1) to conform to the dielectric resonator (1), and the electromagnetic wave energy passes through the feeder (2) ) is conducted to the dielectric resonator (1); The dielectric substrate (3) is made of ceramics, the relative dielectric constant of the dielectric substrate (3) is 5.8, and the dielectric substrate (3) is in a closed ring shape for wearing on the arm. 2. The TM mode wearable arc-shaped dielectric resonator antenna of a kind of conformal feeding according to claim 1 is characterized in that: the dielectric resonator (1) is made of alumina ceramic material, and the relative permittivity is 12.3 , with an inner diameter of 40mm, a thickness of 10mm, a curvature of 60 degrees, and a width of 27mm. 3. A conformally fed TM mode wearable arc-shaped dielectric resonator antenna according to claim 2, characterized in that: the thickness of the dielectric substrate 3 is 2 mm, the inner diameter is 38 mm, and the width is 60 mm. 4. the TM mode wearable arc dielectric resonator antenna of a kind of conformal feeding according to claim 3 is characterized in that: feeder (2) is a copper microstrip line, and feeder (2) is divided into dielectric substrate ( 3) The upper part and the upper part of the dielectric resonator (1); the upper feeder (2) part of the dielectric substrate (3) has a width of 5.64 mm and a length of 16.5 mm, and the part of the feeder (2) that is conformal to the dielectric resonator (1) The width is 5.00mm and the height is 9.52mm.