CN210350087U

CN210350087U - Plane microstrip array antenna of eccentric feed

Info

Publication number: CN210350087U
Application number: CN201921042252.5U
Authority: CN
Inventors: 王国栋; 孔芳玲
Original assignee: Shenzhen Huaxun Fangzhou Radar Technology Equipment Co ltd
Current assignee: WUHAN HUAXUN GUORONG TECHNOLOGY CO.,LTD.
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-04-17
Anticipated expiration: 2029-07-04

Abstract

The utility model relates to a plane microstrip array antenna of eccentric feed, including PCB dielectric plate, present needle, the front of PCB dielectric plate is attached there is the radiation piece, and the back of PCB dielectric plate is attached metal floor, presents the needle and is used for giving the radiation piece feed, presents the needle and runs through PCB dielectric plate, metal floor, the radiation piece includes a plurality of microstrip piece array elements and the microstrip feeder of intercommunication microstrip piece array element, and the microstrip feeder includes horizontal microstrip feeder, vertical microstrip feeder, arranges into multirow and multiseriate between a plurality of microstrip piece array elements, and the number of each row of microstrip piece array element is the same; all microstrip chip array elements are respectively symmetrical on the PCB medium plate about a central short shaft and a central long shaft, the intersection point of the central short shaft and the central long shaft is a central point, a longitudinal microstrip feeder is superposed with the central short shaft, a gap is reserved between every row and every column of adjacent microstrip chip array elements, every row of microstrip chip array elements are connected through a transverse feeder, every row of transverse feeders are communicated through the longitudinal feeder, and a feed needle is installed on the central short shaft and deviates from the central point.

Description

Plane microstrip array antenna of eccentric feed

Technical Field

The utility model relates to an eccentric feed's plane microstrip array antenna.

Background

The microstrip antenna has the advantages of small volume, light weight, simple manufacture, easy integration, convenient conformation and the like, thereby being popular with users. However, because a single antenna has low gain, wide beam and low radiation efficiency, in order to achieve the radiation performance of narrow beam and high gain, the planar microstrip array antenna in the prior art is widely applied to airborne radars, satellite communications, mobile communications and satellite television systems. The planar microstrip array antenna also has the advantages of thin thickness, small volume, easiness in integration and the like, but the problem that the maximum radiation point deviates from the center of the antenna exists in the radiation direction of the planar microstrip array antenna in the prior art, and in the prior art, for the planar microstrip array antenna with thin thickness, in order to ensure the flatness of the plane, a whole-surface rubberizing mode is generally used, so that the thickness of the antenna is increased, the dielectric loss of the antenna is increased, the radiation gain of the antenna is reduced, and the antenna is tightly attached to a fixing plate in a rubberizing mode, and the repeated disassembly is not facilitated.

Disclosure of Invention

In order to solve the technical problem, the utility model provides an eccentric feed's plane microstrip array antenna, including PCB dielectric-slab, present needle, the front of PCB dielectric-slab is attached there is the radiation piece, metal floor is attached to the back of PCB dielectric-slab, present needle is used for giving the radiation piece feed, present needle runs through PCB dielectric-slab, metal floor, the radiation piece includes a plurality of microstrip piece array elements and the microstrip feeder that communicates microstrip piece array element, the microstrip feeder includes horizontal microstrip feeder, vertical microstrip feeder, arrange multirow and multiseriate between a plurality of microstrip piece array elements, the number of each row of microstrip piece array element is the same; all microstrip chip array elements are longitudinally and transversely symmetrical on the PCB dielectric plate respectively, wherein the longitudinal symmetrical axis is a central long axis, the transverse symmetrical axis is a central short axis, the intersection point of the central short axis and the central long axis is a central point, the longitudinal microstrip feeder line is superposed with the central short axis, a gap is reserved between every two adjacent microstrip chip array elements in each row and each column, each row of microstrip chip array elements are connected through the transverse feeder line, the transverse feeder line in each row is communicated through the longitudinal feeder line, and the feed pin is arranged on the central short axis and deviates from the central point.

Further, the gap size is equal to the medium wavelength.

Further, the feed pin is arranged at a distance of 1/4 medium wavelengths from the central point

Further, a screw hole is formed in the PCB dielectric plate and used for matching with a screw to attach the antenna to a fixing plate for mounting the antenna.

Further, the microstrip chip array element is rectangular.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the maximum radiation point of the antenna of the utility model is positioned right above the center of the antenna;

2. the antenna of the utility model can be repeatedly assembled and disassembled on the fixed plate without damage;

3. the utility model discloses an antenna realizes high-gain narrow beam radiation.

Drawings

Fig. 1 is a front structure view of the planar microstrip array antenna of the present invention;

fig. 2 is a back structure view of the planar microstrip array antenna of the present invention;

fig. 3 is a standing-wave ratio simulation result diagram of the central frequency point of the microstrip array antenna of the present invention;

fig. 4 is a simulation result of the H-plane directional diagram of the microstrip array antenna of the present invention;

fig. 5 is a simulation result diagram of the E-plane directional diagram of the planar microstrip array antenna of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the planar microstrip array antenna structure with eccentric feed comprises a PCB dielectric plate 1 and a feed pin 4, wherein a radiation piece is attached to the front surface of the PCB dielectric plate 1, a metal floor 8 is attached to the back surface of the PCB dielectric plate, the feed pin 4 is used for feeding the radiation piece, the feed pin 4 penetrates through the PCB dielectric plate 1 and the metal floor 8, the radiation piece comprises a plurality of microstrip array elements 6 and a microstrip feed line communicated with the microstrip array elements 6, and the plurality of microstrip array elements 6 are identical in shape and size.

The plurality of microstrip piece array elements 6 are arranged in a plurality of rows and a plurality of columns; in multiple rows, the number of the microstrip chip array elements 6 in each row is the same; in multiple rows, the number of the array elements of each row of the microstrip pieces is the same; gaps are reserved between every two adjacent microstrip chip array elements 6 in each row and each column. The size of the gap is equal to the medium wavelength, the microstrip feeder comprises a transverse microstrip feeder 2 and a longitudinal microstrip feeder 5, each row of microstrip chip array elements 6 are connected through the transverse microstrip feeder 2, the transverse microstrip feeder 2 of each row is communicated through the longitudinal microstrip feeder 5, all the microstrip chip array elements 6 are longitudinally and transversely symmetrical on the PCB medium plate 1 respectively, the longitudinal symmetrical axis is a central long axis 10, the transverse symmetrical axis is a central short axis 20, and the intersection point between the central long axis 10 and the central short axis 20 is a central point. Wherein, the longitudinal microstrip feed line 5 coincides with the central short axis 20, and the feed pin is installed on the central short axis and deviates from the position of the central point. The feed pin is offset from a center point 1/4 at the wavelength of the medium.

The microstrip chip array elements are designed in mirror symmetry with respect to the central long axis and used for ensuring that the maximum radiating point of the antenna is positioned right above the center of the antenna, the microstrip chip array elements are in mirror symmetry with respect to the central long axis, so that the phases of the microstrip array elements on two sides of the central long axis are different by 180 degrees, and the feed pins are deviated from the position of the central point 1/4 medium wavelength, so that the phase difference of the microstrip array elements on two sides of the central long axis is +/-180 degrees. Therefore, the microstrip chip array element is designed in mirror symmetry about the central long axis and is combined with the design of the feed pin deviating from the central point 1/4 medium wavelength, so that the phase difference of the microstrip array elements on the two sides of the central long axis is 0 degree or 360 degrees, and in-phase feeding is ensured.

Further, be provided with screw hole 3 on the PCB dielectric-slab, the screw hole is used for cooperating the screw with the antenna laminating on the fixed plate of installation antenna.

Wherein, the structure of antenna is thinner, keep the plane degree when for making the antenna mounting on the fixed plate, generally scribble the colloid with the whole face on antenna floor and then paste on the fixed plate among the prior art, but the mode of rubberizing will lead to the whole thick dielectric loss who considers the colloid simultaneously of increasing of antenna, will reduce the radiation performance of antenna, moreover adopt the colloid to paste, be unfavorable for repeated dismantlement, and the utility model discloses in, because central major axis both sides microstrip array element adopts mirror symmetry to set up to the vertical interval of microstrip piece array element of both sides and has reserved great clearance, and in order to guarantee the plane degree of antenna mounting, can adopt the screw to paste tight fixed plate with it in the clearance, do the thickness that can not increase the antenna like this, adopt the easy repeated dismantlement of screw fixation to use moreover.

Further, the microstrip chip array element 6 is rectangular.

Referring to fig. 3, the standing-wave ratio simulation result of the central frequency point f0 of the microstrip planar array antenna in this embodiment is shown. It can be seen from the figure that at f0 frequency point, the standing-wave ratio of the antenna is 1.04, which indicates that the antenna of the present invention has good impedance matching.

In this embodiment, a plane perpendicular to the antenna plane and having the antenna central short axis is a vertical plane, the directional pattern of the antenna on the plane is an E-plane directional pattern, and fig. 4 is a simulation result of the E-plane directional pattern of the antenna.

In this embodiment, a plane perpendicular to the antenna plane and having the central long axis of the antenna is a horizontal plane, the directional pattern of the antenna on the plane is an H-plane directional pattern, and fig. 5 is a simulation result of the H-plane directional pattern of the antenna.

According to the simulation result, the antenna radiation gain reaches more than 25dB, the H-plane half-power beam width (HPBW) is only 3.3 degrees, the E-plane half-power beam width is 18.2 degrees, and the structure of the utility model realizes the high-gain narrow beam radiation. It can also be seen from fig. 4 and 5 that the maximum radiation point of the antenna is located at theta-0, i.e. perpendicular to the plane of the antenna and directly above the center of the antenna.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An eccentric feed plane microstrip array antenna, characterized by: the radiating element comprises a PCB (printed circuit board) dielectric slab and a feed pin, wherein a radiating sheet is attached to the front surface of the PCB dielectric slab, a metal floor is attached to the back surface of the PCB dielectric slab, the feed pin is used for feeding the radiating sheet, the feed pin penetrates through the PCB dielectric slab and the metal floor, the radiating sheet comprises a plurality of microstrip sheet array elements and a microstrip feeder line communicated with the microstrip sheet array elements, the microstrip feeder line comprises a transverse microstrip feeder line and a longitudinal microstrip feeder line, a plurality of rows and a plurality of columns are formed among the microstrip sheet array elements, and the number of the microstrip sheet array elements in each row is the same; all microstrip chip array elements are longitudinally and transversely symmetrical on the PCB dielectric plate respectively, wherein the longitudinal symmetrical axis is a central long axis, the transverse symmetrical axis is a central short axis, the intersection point of the central short axis and the central long axis is a central point, the longitudinal microstrip feeder line is superposed with the central short axis, a gap is reserved between every two adjacent microstrip chip array elements in each row and each column, each row of microstrip chip array elements are connected through the transverse feeder line, the transverse feeder line in each row is communicated through the longitudinal feeder line, and the feed pin is arranged on the central short axis and deviates from the central point.

2. The planar microstrip array antenna of claim 1, wherein: the gap size is equal to the medium wavelength.

3. The planar microstrip array antenna of claim 2, wherein: the feed pin is installed at a distance of 1/4 medium wavelengths from the center point.

4. The planar microstrip array antenna of claim 1, wherein: the PCB dielectric plate is provided with screw holes, and the screw holes are used for matching screws to attach the antenna to a fixing plate for mounting the antenna.

5. The planar microstrip array antenna of any of claims 1 to 4 wherein: the array elements of the microstrip pieces are rectangular.