CN110707426A - A broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias - Google Patents

Abstract

The invention discloses a broadband high-gain compression high-order mode dual-polarization differential antenna loaded with via holes, comprising a microstrip dielectric substrate (4); the microstrip dielectric substrate (4) is provided with a metal sheet (5); the metal sheet The central position of (5) has an elongated slot (3); a plurality of via hole arrays (1) are arranged on the metal sheet (5); each via hole array (1) includes a plurality of via holes arranged at equal intervals, The centers of multiple vias are on the same line. The invention discloses a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with via holes, which can further increase the bandwidth of the antenna and improve the gain of the antenna by adding via holes and elongated slits, so as to better satisfy people's needs The demand for the use of the antenna has great practical significance in production.

Description

A broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias

technical field

The invention relates to the technical field of antennas, in particular to a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias.

Background technique

There is an increasing demand for small, fully integrated radio frequency (RF) front-end products in the wireless communications market. The antenna is an important part of the transceiver system. It mainly carries the function of transmitting and receiving electromagnetic wave signals, and plays an important role in military or civilian use.

The gain of the antenna is the most important index to evaluate the performance of the antenna. Many dual-polarized differentially fed dipole-type antennas increase the cost of their application due to their multi-level structure. In addition, some single-layer differential dual-polarized microstrip patch antennas have relatively narrow bandwidth (for example, less than 2%), and their gain is also relatively small (for example, less than 8 dBi), which cannot meet the needs of users for the use of antennas. .

Therefore, there is an urgent need to develop a dual-polarized differential antenna, which can further increase the bandwidth of the antenna, improve the gain of the antenna, and better meet people's needs for using the antenna.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with via holes in view of the technical defects existing in the prior art.

To this end, the present invention provides a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias, including a microstrip dielectric substrate;

There is a metal sheet on the microstrip dielectric substrate;

The central position of the metal sheet has a slender slot;

A plurality of via hole arrays are arranged on the metal sheet;

Each via hole array includes a plurality of via holes arranged at equal intervals, and the centers of the plurality of via holes are located on the same straight line.

Wherein, when the shape of the metal sheet is a horizontally distributed rectangle, the left and right ends of the metal sheet are respectively provided with a longitudinally distributed via hole array;

The two via arrays are axisymmetrically distributed;

The middle of the metal sheet has a longitudinally distributed elongated slit.

Wherein, when the shape of the metal sheet is a horizontally distributed rectangle, the metal sheet has a differential feeding probe on the left and right sides of the elongated slit, respectively;

The center point of the differential feed probe and the elongated slot is located on the same horizontal straight line;

Differential feed probe, located on the metal sheet in the inner direction of the via array.

The via array runs through the metal sheet and the microstrip dielectric substrate from top to bottom, and is located above the bottom surface of the grounding plate;

The elongated slit is an opening located on the metal sheet, and its bottom surface is the top surface of the microstrip dielectric substrate;

The differential feeding probes are vertically inserted into the metal sheet and the microstrip dielectric substrate from top to bottom.

Wherein, when the shape of the metal sheet is a cross shape, the center position of the metal sheet is provided with a first elongated slot and a second elongated slot distributed in a crisscross pattern;

The intersection point of the first elongated slot and the second elongated slot is the center point of the metal sheet;

The upper and lower ends of the metal sheet are respectively provided with a longitudinally distributed via hole array;

The left and right ends of the metal sheet are respectively provided with a laterally distributed via hole array;

Taking the center point of the metal sheet as the center, the four via arrays are distributed symmetrically around the center.

Wherein, when the shape of the metal sheet is a cross shape, the metal sheet has a differential feeding probe on the left and right sides of the second elongated slot respectively;

The metal sheet also has a differential feeding probe on the upper and lower sides of the first elongated slot;

Differential feed probe, located on the metal sheet in the inner direction of the via array.

Among them, the radius of each via is 0.5mm.

It can be seen from the above technical solutions provided by the present invention that, compared with the prior art, the present invention provides a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias, which can increase the vias and elongated slits by adding vias. , further increase the bandwidth of the antenna, improve the gain of the antenna, and better meet people's needs for the use of the antenna, which has great practical significance in production.

Description of drawings

1 is a schematic top view of a via-loaded broadband high-gain compressed high-order mode dual-polarized differential antenna provided by the present invention;

2 is a schematic structural diagram of a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias provided by the present invention shown in FIG. 2, after being vertically cut in the middle along the long side direction;

Fig. 3 is a kind of broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias provided by the present invention, and is a top-view structural schematic diagram of the preferred embodiment;

4 is a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias provided by the present invention, and the existing dual-polarized differential antennas without vias have relative bandwidths |S ₁₁ | Schematic diagram with gain;

FIG. 5 is a schematic diagram of simulation and test gain of a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias provided by the present invention, in the preferred embodiment.

In the figure, 1 is an array of vias, 2 is a differential feed probe, 3 is an elongated slot, and 4 is a microstrip dielectric substrate;

5 is a metal sheet, 6 is a ground plate;

71 is the first elongated slot, and 72 is the second elongated slot.

Detailed ways

In order to make those skilled in the art better understand the solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 to FIG. 5, the present invention provides a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias, including a microstrip dielectric substrate 4;

The microstrip dielectric substrate 4 is provided with (for example, by printing) a metal sheet 5;

The central position of the metal sheet 5 has an elongated slot 3;

The metal sheet 5 is provided with a plurality of via hole arrays 1;

Each via hole array 1 includes a plurality of via holes (ie, metallized holes) arranged at equal intervals, and the centers of the plurality of via holes are located on the same straight line.

In the present invention, in terms of specific implementation, when the shape of the metal sheet 5 is a horizontally distributed rectangle, the left and right ends of the metal sheet 5 are respectively provided with a longitudinally distributed via hole array 1;

The two via arrays 1 are axisymmetrically distributed;

The middle of the metal sheet 5 has a longitudinally distributed elongated slot 3 .

In terms of specific implementation, when the shape of the metal sheet 5 is a horizontally distributed rectangle, the metal sheet 5 has a differential feeding probe 2 on the left and right sides of the elongated slot 3 respectively;

The center point of the differential feeding probe 2 and the elongated slot 3 is located on the same horizontal straight line;

The differential feeding probe 2 is located on the metal sheet 5 in the inner direction of the via hole array 1 (ie, the direction toward the center point of the metal sheet 5 ).

In terms of specific implementation, the elongated slot is located in the center of the antenna and is rectangular, with a length of 24 mm and a width of 0.3 mm.

In terms of specific implementation, as shown in FIG. 2 , the via array 1 runs through the metal sheet 5 and the microstrip dielectric substrate 4 from top to bottom, and is located above the bottom surface of the grounding plate 6 ;

The elongated slit 3 is an opening located on the metal sheet 5, and its bottom surface is the top surface of the microstrip dielectric substrate 4;

The differential feeding probe 2 is vertically inserted into the metal sheet 5 and the microstrip dielectric substrate 4 in sequence from top to bottom.

In specific implementation, the microstrip dielectric substrate 4 is located on the ground plane (ie, a thin metal layer).

In the present invention, in terms of specific implementation, when the shape of the metal sheet 5 is a cross shape, the center position of the metal sheet 5 is provided with a first elongated slot 71 and a second elongated slot 72 distributed in a crisscross pattern;

The intersection point of the first elongated slot 71 and the second elongated slot 72 is the center point of the metal sheet 5;

The upper and lower ends of the metal sheet 5 are respectively provided with a longitudinally distributed via hole array 1;

The left and right ends of the metal sheet 5 are respectively provided with a laterally distributed via hole array 1;

Taking the center point of the metal sheet 5 as the center, the four via hole arrays 1 are symmetrically distributed.

In terms of specific implementation, when the shape of the metal sheet 5 is a cross shape, the metal sheet 5 has a differential feeding probe 2 on the left and right sides of the second elongated slot 72 respectively;

The metal sheet 5 also has a differential feeding probe 2 on the upper and lower sides of the first elongated slot 71;

The differential feeding probe 2 is located on the metal sheet 5 in the inner direction of the via hole array 1 (ie, the direction toward the center point of the metal sheet 5 ).

In the present invention, in terms of specific implementation, the radius of each via hole is 0.5 mm. It should be noted that 0.5mm is obtained through optimization and debugging in the cavity mode of the patch through the simulation software. The shape of the via hole is a circle with a radius of 0.5mm, the center of which is 15.65mm from the central slot, and is symmetrically distributed about the central slot.

In the present invention, the distance between two via arrays that are symmetrically distributed up, left and right or up and down is implemented, and is preferably one wavelength of the waveguide.

In terms of specific implementation, the number of via holes included in the two via hole arrays 1 is 10. After adding the elongated slot, the resonant frequency band of the antenna can be adjusted to about 5 GHz.

It should be noted that, in the present invention, the via hole is used to increase the gain and bandwidth of the antenna. The antenna is connected to an external existing radio frequency circuit through a differential feeding probe to feed the antenna. The setting of the slender slot can adjust the frequency band of the antenna to about 5GHz.

It should be noted that, as shown in FIG. 1 , for the present invention, the present invention provides a single-layer dual compressed mode differential patch antenna. In order to make it work in a higher-order mode with a compressibility factor of 2, the length of the metal sheet 5 is 1.5 waveguide wavelength, and the width of the metal sheet 5 is 0.75 free space wavelength. In order to determine its center resonance frequency around 5GHZ, an elongated slot is added in the center of the patch. In order to increase its bandwidth, an array of vias distributed symmetrically with elongated slits is added.

According to the present invention, after adding a via array and performing a series of optimizations, it is obtained that the patch antenna can achieve a gain greater than 9.6 dBi at a frequency of 4.8-5 GHz.

As shown in FIG. 3 , the present invention is used as a single-layer dual-compression-mode dual-polarization differential patch antenna, which adds a via hole array 1 with a radius of 0.5 mm for each via hole on the metal sheet 5 . Two elongated slots (a first elongated slot 71 and a second elongated slot 72) are added in the center of the metal sheet 5, and the center frequency of the antenna is adjusted to be about 5 GHz. The patch antenna of the present invention adopts differential feeding, and the feeding port is the differential feeding probe 2 .

Referring to FIG. 4 , FIG. 3 is a graph of relative bandwidth |S ₁₁ | and gain of the patch antenna with and without vias. It can be clearly seen from Figure 4 that the patch antenna can obtain the 4.8-5GHz frequency band required without the via hole after adding the via hole, and the gain in the 4.8-5GHz frequency band is greater than 9.6dBi.

Referring to FIG. 5, FIG. 5 is a simulation and test gain diagram of the antenna according to the preferred embodiment of the present invention. It can be seen from Figure 5 that the difference between the measured value and the simulated value of the single-layer dual-polarized differential patch antenna is within the allowable error range. After a series of optimizations on the radius and spatial position of the via hole, the gain is greater than 9.6dBi and is almost constant. Outside this frequency band, the gain decreases rapidly.

Based on the above technical solutions, the present invention, as a high-gain broadband antenna, realizes high antenna gain by operating the antenna in a high-order mode, increases the antenna bandwidth by loading vias, and adjusts the center of the antenna by adding elongated slits. frequency.

To sum up, compared with the prior art, the present invention provides a broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias, which can further increase the antenna's efficiency by adding vias and elongated slots. Bandwidth, increase the gain of the antenna, and better meet people's needs for the use of the antenna, which has great practical significance in production.

The innovation of this patent is that the patch size is 1.5 waveguide wavelength, which makes the patch antenna work in high-order mode and realizes high gain. In addition, two rows of via holes are added, and the distance between the two rows of via holes is one waveguide wavelength, which increases the bandwidth.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with via holes is characterized by comprising a micro-strip medium substrate (4);

the metal sheet (5) is arranged on the microstrip medium substrate (4);

the metal sheet (5) is provided with a slender gap (3) at the center;

a plurality of via hole arrays (1) are arranged on the metal sheet (5);

each through hole array (1) comprises a plurality of through holes which are arranged at equal intervals, and the centers of the through holes are positioned on the same straight line.

2. The broadband high-gain compressed high-order mode dual-polarized differential antenna with the loaded via holes as claimed in claim 1, wherein when the metal sheet (5) is in a shape of a rectangle distributed transversely, the left and right ends of the metal sheet (5) are respectively provided with a via hole array (1) distributed longitudinally;

the two via hole arrays (1) are distributed in an axisymmetric manner;

the middle part of the metal sheet (5) is provided with a strip of elongated slit (3) which is distributed longitudinally.

3. The via-loaded broadband high-gain compressed high-order mode dual-polarized differential antenna is characterized in that when the metal sheet (5) is in a shape of a transversely distributed rectangle, the metal sheet (5) is provided with a differential feed probe (2) at each of the left side and the right side of the elongated slot (3);

the differential feed probe (2) and the central point of the elongated slot (3) are positioned on the same transverse straight line;

and the differential feed probe (2) is positioned on the metal sheet (5) in the inner side direction of the via hole array (1).

4. The broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with the via holes as claimed in claim 3, wherein the via hole array (1) penetrates through the metal sheet (5) and the microstrip dielectric substrate (4) from top to bottom and is positioned above the bottom surface of the ground plate (6);

the elongated slot (3) is an opening positioned on the metal sheet (5), and the bottom surface of the elongated slot is the top surface of the microstrip medium substrate (4);

the differential feed probe (2) is vertically inserted into the metal sheet (5) and the microstrip medium substrate (4) from top to bottom in sequence.

5. The via-loaded broadband high-gain compressed high-order mode dual-polarized differential antenna is characterized in that when the metal sheet (5) is in a cross shape, a first elongated slot (71) and a second elongated slot (72) which are distributed in a cross shape are arranged at the center of the metal sheet (5);

the intersection point of the first elongated slit (71) and the second elongated slit (72) is the center point of the metal sheet (5);

the upper end and the lower end of the metal sheet (5) are respectively provided with a longitudinally distributed through hole array (1);

the left end and the right end of the metal sheet (5) are respectively provided with a via hole array (1) which is distributed transversely;

the four via hole arrays (1) are distributed symmetrically by taking the central point of the metal sheet (5) as the center.

6. The via-loaded broadband high-gain compressed high-order mode dual-polarized differential antenna is characterized in that when the metal sheet (5) is in a cross shape, the metal sheet (5) is provided with one differential feed probe (2) at each of the left side and the right side of the second elongated slot (72);

the metal sheet (5) is also provided with a differential feed probe (2) at the upper side and the lower side of the first elongated slot (71);

and the differential feed probe (2) is positioned on the metal sheet (5) in the inner side direction of the via hole array (1).

7. The via-loaded broadband high-gain compressed high-order mode dual-polarized differential antenna according to any one of claims 1 to 6, wherein a radius of each via is 0.5 mm.

Images