阅读说明：本技术 一种收发天线及手持式穿墙雷达系统 (Transmit-receive antenna and hand-held type through-wall radar system ) 是由 刘马良 张建强 兰皓坤 朱樟明 杨银堂 于 2019-09-09 设计创作，主要内容包括：本发明涉及一种收发天线及手持式穿墙雷达系统,该收发天线包括介质基板、至少两个天线结构、若干枝节和若干第一缝隙,其中,天线结构并列设置在介质基板的第一侧表面上；若干第一缝隙分布在天线结构的两侧,且第一缝隙与天线结构的辐射方向垂直；若干枝节一一对应的分布在介质基板的两侧表面上,且若干枝节位于天线结构的辐射方向上。该收发天线通过在天线结构的两侧分布第一缝隙,实现天线的小型化,同时在天线结构的辐射方向分布设置枝节,提高整个天线的辐射增益,从而使得天线可以与射频电路板进行系统集成来减小穿墙雷达系统整体的尺寸,提高穿墙雷达系统的探测距离和系统的角度分辨率,进而获得高性能小型化的穿墙雷达系统。(The invention relates to a transceiving antenna and a handheld through-wall radar system, wherein the transceiving antenna comprises a dielectric substrate, at least two antenna structures, a plurality of branches and a plurality of first gaps, wherein the antenna structures are arranged on the first side surface of the dielectric substrate in parallel; the plurality of first gaps are distributed on two sides of the antenna structure, and the first gaps are vertical to the radiation direction of the antenna structure; the branches are distributed on the surfaces of the two sides of the dielectric substrate in a one-to-one correspondence mode, and the branches are located in the radiation direction of the antenna structure. This receiving and dispatching antenna is through the first gap that distributes in antenna structure's both sides, realizes the miniaturization of antenna, distributes at antenna structure's radiation direction simultaneously and sets up the minor matters, improves the radiation gain of whole antenna to make the antenna can carry out the system integration with radio frequency circuit board and reduce the holistic size of through-wall radar system, improve the angle resolution ratio of the range separation of penetrating through-wall radar system and system, and then obtain the miniaturized through-wall radar system of high performance.)

1. A transceiver antenna, comprising: a dielectric substrate (1), at least two antenna structures (2), a plurality of branches (3) and a plurality of first slots (4), wherein,

the antenna structures (2) are arranged on the first side surface of the dielectric substrate (1) in parallel;

the plurality of first gaps (4) are distributed on two sides of the antenna structure (2), and the first gaps (4) are perpendicular to the radiation direction of the antenna structure (2);

the branches (3) are distributed on the surfaces of the two sides of the dielectric substrate (1) in a one-to-one correspondence mode, and the branches (3) are located in the radiation direction of the antenna structure (2).

2. Transceiver antenna according to claim 1, characterized in that the number of antenna structures (2) is 2.

3. Transceiver antenna according to claim 1, characterized in that the antenna structure (2) comprises an exponentially tapered slot (21) and a circular ring (22), wherein,

the circular ring (22) is arranged at the narrow end of the index gradual change gap (21);

the branches (3) are distributed at the wide opening end of the index gradual change gap (21);

the first gaps (4) are distributed on two sides of the index gradual change gap (21).

4. Transceiver antenna according to claim 3, characterized in that several of the first slots (4) are symmetrically distributed on both sides of the exponentially tapering slot (21).

5. Transceiver antenna according to claim 3, characterized in that several of the first slots (4) located at one side of the exponentially tapering slots (21) are evenly distributed.

6. The transmit receive antenna according to claim 1, characterized in that the branches (3) on the surface of one side of the antenna structure (2) are arranged periodically.

7. Transceiver antenna according to claim 1, characterized in that the shape of the branches (3) comprises one or more of a rectangle, a triangle, a circle, a trapezoid.

8. The transceiver antenna of claim 1, further comprising: at least one second slot (5), wherein the second slot (5) is arranged between two adjacent antenna structures (2), and the second slot (5) is perpendicular to the first slot (4).

9. The transceiver antenna of claim 1, further comprising: the antenna comprises at least two feed lines (6), wherein the feed lines (6) are arranged on the second side surface of the medium substrate (1), and the feed lines (6) correspond to the antenna structures (2) one by one.

10. A handheld through-wall radar system comprising a transceiving antenna and a radio frequency transceiving system, wherein the transceiving antenna comprises the transceiving antenna according to any one of claims 1 to 9;

the radio frequency transceiving system comprises a radio frequency interface (7) and at least two radio frequency transceiving chip sets (8), wherein the radio frequency transceiving chip sets (8) are connected with the radio frequency interface (7), and each radio frequency transceiving chip set (8) is connected with the transceiving antenna.

Technical Field

The invention belongs to the field of microwave antennas, and particularly relates to a transmitting-receiving antenna and a handheld through-wall radar system.

Background

The through-wall radar is a device for detecting a target behind a wall or other shelter through an electromagnetic wave signal. The through-wall radar can process and analyze the echo signals, so that a target behind a wall body can be positioned and tracked. And the through-wall radar can penetrate through obstacles to detect weak signals such as heartbeat, respiration and the like. By using the detection characteristic of wall penetration, the soldier can quickly master the dynamics of the enemy army in the battlefield of anti-terrorism and street fighting, so as to make correct judgment at the first time; in the rescue operation of a disaster site, rescuers can find buried persons in ruins as fast as possible, so that the survival probability of survivors is greatly improved.

The antenna is used as an important component of a through-wall radar system, and the performance of the antenna plays a crucial role in the whole system. A novel magnetic dipole antenna as a through-wall radar antenna was developed by zhao xingwi, a college of science in shandong, 12 months in 2017. In the same year, an ultra-wideband horn antenna is designed by Anirudh doctor of India RNS research center; the working frequency of the antenna is 1.4GHz, a linear polarization working mode is adopted, the antenna is successfully applied in a through-wall radar experiment, and test results prove that the antenna has good detection performance.

Although various antennas have been developed in the past for use as through-wall radar antennas. However, they have a large size and a small gain, and cannot be integrated with a through-wall radar system, and cannot realize a high-performance through-wall radar system.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a transmitting-receiving antenna and a handheld through-wall radar system. The technical problem to be solved by the invention is realized by the following technical scheme:

an embodiment of the present invention provides a transceiver antenna, including: a dielectric substrate, at least two antenna structures, a plurality of branches and a plurality of first slots, wherein,

the antenna structures are arranged on the first side surface of the dielectric substrate in parallel;

the plurality of first slots are distributed on two sides of the antenna structure, and the first slots are vertical to the radiation direction of the antenna structure;

the branches are distributed on the surfaces of the two sides of the dielectric substrate in a one-to-one correspondence mode, and the branches are located in the radiation direction of the antenna structure.

In one embodiment of the invention, the number of antenna structures is 2.

In one embodiment of the invention, the antenna structure comprises an exponentially tapered slot and a circular ring, wherein,

the circular ring is arranged at the narrow-mouth end of the index gradual change gap;

the plurality of branches are distributed at the wide opening end of the index gradual change gap;

the plurality of first gaps are distributed on two sides of the index gradual change gap.

In one embodiment of the invention, a plurality of the first slits are symmetrically distributed on two sides of the index gradual change slit.

In one embodiment of the invention, a number of said first slits located at one side of said exponentially tapering slits are evenly distributed.

In one embodiment of the present invention, the branches on one side surface of the antenna structure are arranged periodically.

In one embodiment of the invention, the shape of the stub comprises one or more of a rectangle, a triangle, a circle, a trapezoid.

In one embodiment of the present invention, further comprising: at least one second gap, the second gap sets up between two adjacent antenna structure, and the second gap is perpendicular with first gap.

In one embodiment of the present invention, at least two feed lines are provided on the second side surface of the dielectric substrate, and the feed lines correspond one-to-one to the antenna structures.

Another embodiment of the invention provides a handheld through-wall radar system, which comprises a transceiving antenna and a radio frequency transceiving system;

wherein the transceiving antenna comprises the transceiving antenna according to the above embodiment;

the radio frequency transceiving system comprises a radio frequency interface and at least two radio frequency transceiving chip sets, wherein the radio frequency transceiving chip sets are connected with the radio frequency interface, and each radio frequency transceiving chip set is connected with the transceiving antenna.

Compared with the prior art, the invention has the beneficial effects that:

the receiving and transmitting antenna can realize the miniaturization of the antenna by distributing the first gaps on the two sides of the antenna structure, and branches are distributed in the radiation direction of the antenna structure and can change the distribution of electromagnetic waves so as to improve the radiation gain of the whole antenna, so that the antenna can be systematically integrated with a radio frequency circuit board to reduce the overall size of the through-wall radar system, improve the detection and distance separation of the through-wall radar system and the angular resolution of the system, and further obtain the high-performance miniaturized through-wall radar system.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of a transceiver antenna according to an embodiment of the present invention;

fig. 2 is a graph illustrating S-parameter curves of a transmitting/receiving antenna according to an embodiment of the present invention;

fig. 3 is a graph of gain of a transmitting/receiving antenna varying with frequency according to an embodiment of the present invention;

FIGS. 4 a-4 c are diagrams illustrating the radiation patterns of a transceiving antenna at 4GHz, 5GHz and 6GHz according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a handheld through-wall radar system according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.