CN219591646U

CN219591646U - PCB spiral antenna based on carrier communication module

Info

Publication number: CN219591646U
Application number: CN202321394656.7U
Authority: CN
Inventors: 龙震中; 赵金华; 曹金龙; 赵德林; 赵晓杰; 赵治海; 公飞; 严由辉
Original assignee: Qingdao Dingxin Communication Power Engineering Co ltd; Qingdao Topscomm Communication Co Ltd
Current assignee: Qingdao Dingxin Communication Power Engineering Co ltd; Qingdao Topscomm Communication Co Ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-08-25
Anticipated expiration: 2033-06-02

Abstract

The utility model relates to the technical field of high-speed carrier communication of a voltage power line and the technical field of radio frequency communication, and discloses a PCB spiral antenna based on a carrier communication module. The PCB spiral antenna is mainly applied to a high-speed carrier communication module, and the working frequency band is 470MHz-510 MHz; the PCB spiral antenna adopts a winding mode of twice folding, so that the internal space of the carrier communication module is saved, the wireless communication performance is effectively guaranteed and enhanced, the PCB spiral antenna unit belongs to a part of a PCB substrate of the carrier communication module, and the PCB spiral antenna has the advantages of low cost, small size, flexibility, reliability, no need of independent installation and the like.

Description

PCB spiral antenna based on carrier communication module

Technical Field

The utility model relates to the technical field of high-speed carrier communication of a voltage power line and the technical field of radio frequency communication, in particular to a PCB spiral antenna suitable for a dual-mode communication module.

Background

The national power grid newly provides a technical specification of dual-mode communication interconnection, and the convergence, transmission and interaction of power consumption information of a low-voltage power user and other energy consumption information are realized through the cooperative work of two channels of a low-voltage power line and space radiation. The wireless communication scheme enables communication modes of the carrier communication module to be diversified, has stronger applicability in complex and changeable field environments, and enhances communication reliability of the carrier communication module.

The existing built-in spring antenna used for the carrier communication module is high in material cost, large in occupied internal space of the carrier communication module, complex in installation procedure and high in installation cost. And the PCB antenna has the advantages of low cost, small size, flexibility, reliability, no need of independent installation and the like. The PCB antenna is connected through metal holes through wiring on the two sides of the PCB substrate, the spiral pattern is simulated, the effective length of the antenna is increased according to the requirement, and the size of the antenna is miniaturized. And the PCB antenna can be widely applied to various electronic equipment, especially the wireless communication field, and the PCB antenna has advantages in the aspect of wireless transmission compared with the traditional spring antenna.

Disclosure of Invention

The technical scheme of the utility model is as follows:

the utility model provides a PCB spiral antenna based on carrier communication module, this scheme comprises PCB spiral antenna unit, LC matching circuit, metal ground and PCB base plate; the front microstrip line, the back microstrip line, the microstrip line feeder and the metal hole form a PCB spiral antenna unit; the PCB spiral antenna unit is connected with the metal ground through an LC matching circuit and is integrated on a PCB substrate.

The PCB spiral antenna unit is formed by connecting a front microstrip line, a back microstrip line and a microstrip line feeder line in an end-to-end spiral manner through metal holes.

The microstrip line and the metal ground are made of metal copper and have the thickness of 0.035mm, wherein the microstrip line comprises a front microstrip line, a back microstrip line and a microstrip line feeder.

The PCB substrate is made of epoxy glass fiber board, and the thickness of the PCB substrate is 1.2mm-1.6mm.

The LC matching circuit consists of a patch capacitor and a patch inductor.

Compared with the prior art, the utility model has the advantages that: the PCB spiral antenna unit is deposited in the PCB substrate by metal copper, so that the vertical space distance of the carrier communication module is not occupied; the back microstrip line adopts a twice folding structure, so that the effective length and the clearance area of the PCB helical antenna unit are increased, and the antenna performance is obviously improved; the PCB spiral antenna unit belongs to a part of a PCB substrate of the carrier communication module, independent installation is not needed, assembly and material cost are saved, and assembly process risks are avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

Fig. 1 is a schematic structural diagram of a PCB spiral antenna carrier-matching communication module;

FIG. 2 is a schematic front view of a PCB helical antenna carrier communication module;

fig. 3 is a schematic back view of a PCB spiral antenna carrier-matching communication module;

fig. 4 is a voltage standing wave ratio diagram of a PCB spiral antenna.

Description of the embodiments

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. The utility model is further described with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of a PCB spiral antenna carrier communication module, including a front microstrip line, a back microstrip line, a metal hole, a microstrip line feeder, an LC matching circuit, a metal ground, and a PCB substrate. The PCB substrate is an epoxy glass fiber board with the thickness of 1.6mm, the thickness of the microstrip line is 0.035mm, the width of the microstrip line is 1mm, then the effective dielectric constant epsilon=2.97, the national network requires the working frequency band f=470-510 MHz of wireless communication, the signal propagation rate in vacuum is the light speed C= 299792458m/s, and the wavelength of electromagnetic waves on the PCB helical antenna unit is 340mm < lambda 1<370mm through the formula (1):

(1)

the wavelength of electromagnetic waves in the 470-510MHz working frequency range in vacuum is 588mm < lambda 2< 428 mm, the average value lambda 3 = 484mm, and the quarter wavelength corresponding to lambda 3 is 121mm; the PCB spiral antenna unit needs to carry out travelling wires on the front side and the back side of the PCB substrate; the sum of the length of the front microstrip line, the length of the back microstrip line and the length of the metal hole is approximately 242mm in half wavelength. The antenna efficiency was designed to be 10%, and the diameter of the PCB spiral antenna unit was 5mm by the operating frequency bandwidth and λ1. In the 470-510MHz working frequency band, the PCB spiral antenna unit is matched at a certain point due to large impedance change, then other frequency bands are considered, the frequency intermediate value is 490MHz, and the parameters of the LC matching circuit are adjusted to enable the impedance to be matched to be 50Ω.

Fig. 2 is a schematic front view of a PCB spiral antenna carrier communication module, the overall length of the front microstrip line and microstrip line feed line is 94.5mm, the width is 1mm, the line spacing is 2mm, and the water included angle of the PCB substrate is 0 °.

Fig. 3 is a schematic diagram of the back of the carrier communication module of the PCB spiral antenna, where the width of the back microstrip line is 1mm and the line spacing is 2mm, and the back microstrip line adopts a twice bending wiring mode, so that the volume of the PCB spiral antenna network is effectively reduced, the headroom area is increased, and the antenna performance is improved.

Fig. 4 shows a voltage standing wave ratio of the PCB spiral antenna according to the present utility model, wherein the voltage standing wave ratio of the carrier communication module and the PCB spiral antenna is actually tested by the network analyzer, the internal pressure standing wave is less than 2 in the working frequency range of 470-510MHz, the voltage standing wave ratio is good, and the loss of the signal in the antenna is small. The gain and efficiency of the carrier communication module matched with the PCB spiral antenna are tested in a full-wave darkroom through the signaling CMW500 of the antenna multi-band tester, the gain is-1 dBi to-8 dBi within the working frequency band range of 470-510MHz, the efficiency is 5% -15%, and the radiation capacity of the antenna is strong.

Finally, it is intended that the foregoing description is only for the purpose of illustrating the technical embodiments of the present utility model and not for the purpose of limiting the same, and that although the present utility model has been described in detail with reference to the best examples, it will be understood by those skilled in the art that a series of modifications and equivalent substitutions may be made to the technical embodiments of the present utility model without departing from the scope and spirit of the technical embodiments of the present utility model, and that all equivalent changes and modifications to the technical embodiments of the present utility model shall be covered by the scope of the patent claims of the present utility model, and that all equivalent technical embodiments shall fall within the scope of the patent claims of the present utility model.

Claims

1. The PCB spiral antenna based on the carrier communication module is characterized by comprising a PCB spiral antenna unit, an LC matching circuit, a metal ground and a PCB substrate; the PCB spiral antenna unit consists of a front microstrip line, a back microstrip line, a microstrip line feeder and a metal hole; the PCB spiral antenna unit is connected with the metal ground through an LC matching circuit and integrated on the PCB substrate.

2. The carrier communication module-based PCB helical antenna of claim 1, wherein the equivalent diameter of the PCB helical antenna unit is 5mm, the equivalent wire length is 242mm, the number of turns of the helix is 18, and the overall external length of the PCB helical antenna unit is 36mm.

3. The PCB spiral antenna based on the carrier communication module according to claim 1, wherein the front microstrip line, the back microstrip line and the microstrip line feeder are made of copper, the line width is 1mm, the line thickness is 0.035mm, the line spacing is 2mm, the front microstrip line adopts a horizontal wiring mode, and the back microstrip line adopts a double folding wiring mode.

4. The carrier communication module-based PCB spiral antenna of claim 1, wherein the metal ground material is copper with a thickness of 0.035mm, and the PCB substrate material is an epoxy fiberglass board with a thickness of 1.2mm-1.6mm.

5. The PCB spiral antenna based on a carrier communication module of claim 1, wherein the LC matching circuit is comprised of a chip capacitor and a chip inductor, and the impedance matching at the 490MHz operating band is 50Ω.