CN116231299A - PCB antenna of LTE wave band - Google Patents

PCB antenna of LTE wave band Download PDF

Info

Publication number
CN116231299A
CN116231299A CN202310446290.1A CN202310446290A CN116231299A CN 116231299 A CN116231299 A CN 116231299A CN 202310446290 A CN202310446290 A CN 202310446290A CN 116231299 A CN116231299 A CN 116231299A
Authority
CN
China
Prior art keywords
antenna
band
antenna structure
substrate
radiator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310446290.1A
Other languages
Chinese (zh)
Inventor
林腾
吴德青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Cheerzing Technology Co ltd
Original Assignee
Xiamen Cheerzing Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiamen Cheerzing Technology Co ltd filed Critical Xiamen Cheerzing Technology Co ltd
Priority to CN202310446290.1A priority Critical patent/CN116231299A/en
Publication of CN116231299A publication Critical patent/CN116231299A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

The invention discloses a PCB antenna of LTE wave band, which comprises a substrate, wherein the substrate is divided into a clearance area and a functional area, and a first antenna structure and a second antenna structure are arranged in the clearance area; the first antenna structures are distributed on the top surface of the substrate, and the second antenna structures are distributed on the bottom surface of the substrate; the first antenna structure is an inverted L antenna or a PIFA antenna; the first antenna structure comprises a feed end, a radiator and tuning sections positioned at the tail end of the radiator, the radiator of the first antenna structure is in serpentine distribution and comprises a plurality of parallel line segments connected end to end, the tuning sections and the parallel line segments are parallel and equal in length, and two ends of the tuning sections are connected with two ends of the second antenna structure through holes to form an annular circuit. According to the invention, the second antenna structure positioned on the bottom surface of the substrate is added to optimize the antenna performance of the first antenna structure, so that the corresponding antenna performance requirement can be realized in a target working wave band through a small antenna size.

Description

PCB antenna of LTE wave band
Technical Field
The invention relates to the field of small-size LTE antennas, in particular to a PCB antenna of an LTE band.
Background
Generally, the efficiency and bandwidth of an antenna are closely related to the size of the antenna, and in the trend of making the size of a communication product smaller, it is more challenging to design an antenna with excellent bandwidth and efficiency in a small-sized product.
The battery power management of electric bicycle is important, before going on a journey, need in time look over electric bicycle's battery power and in time charge. In order to adapt to remote management of components such as a bicycle battery, a PCB antenna suitable for a small-size LTE wave band of an electric bicycle needs to be developed.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is directed to a small-sized PCB antenna of LTE band, which can cover LTE B5 and B8 bands, and is suitable for remote management of components such as a bicycle battery to obtain the electric quantity data of the bicycle battery.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the PCB antenna of the LTE wave band comprises a substrate, wherein the substrate is divided into a clearance area and a functional area, a first antenna structure is arranged on the top surface of the substrate in the clearance area, and a second antenna structure is arranged on the bottom surface of the substrate; the first antenna structure is an inverted L antenna or a PIFA antenna, and the second antenna structure is a line segment; the functional area is provided with a ground plane; the first antenna structure comprises a feed end, a radiator and a tuning section which are sequentially connected, and the feed end is arranged close to the ground plane; the radiator adopts a snake-shaped wiring and comprises a plurality of parallel line segments connected end to end; the second antenna structure corresponds to the tuning line segment and is symmetrically arranged on the top surface and the bottom surface of the substrate, and two ends of the second antenna structure and the tuning line segment are connected through a via hole to form an annular circuit.
Further, the antenna supports at least two working bands of the LTE band, and a ratio of an antenna length of the first antenna structure to a quarter wavelength of a center frequency of the first working band is 1 to 1.05; the ratio of the antenna length of the second antenna structure to the difference between the quarter central wavelength of the first working wave band and the quarter central wavelength of the second working wave band is 1.5-1.8; wherein the center frequency of the first operating band is lower than the center frequency of the second operating band.
Further, the first working band is a B5 band of the LTE band; the second working band is a B8 band of the LTE band.
Further, the height of the clearance area is 11.5 mm-13.5 mm, and the length of the clearance area is 23 mm-25 mm.
Further, the line widths of the radiator and the second antenna structure are 0.4-0.6 mm, the line spacing of the radiator is 0.8-1 mm, and the widths of the radiator and the second antenna structure are 1-2 mm smaller than the length of the clearance area; the distance between the radiator and the ground plane is more than 4.5 mm.
Further, the height of the clearance area is 11.5mm, and the length of the clearance area is 25mm; the line widths of the radiator and the second antenna structure are 0.5mm, the line spacing of the radiator is 1mm, and the widths of the radiator and the second antenna structure are 23.5mm; the radiator comprises four parallel line segments.
Further, the substrate is an FR-4 substrate, the relative dielectric constant of the substrate is 4.4, and the thickness of the substrate is 1mm.
Further, the feed end is connected to the functional area through a planar transmission line with an impedance matching network.
The invention realizes the following technical effects:
the PCB antenna of the LTE band can cover a plurality of bands of LTE, so that the PCB antenna can realize corresponding antenna performance requirements in a target working band through a small antenna size, and is suitable for remote management of components such as a bicycle battery.
Drawings
Fig. 1 is a top view of a first embodiment of a PCB antenna of the LTE band of the present invention;
fig. 2 is a bottom view of a first embodiment of a PCB antenna of the LTE band of the present invention;
fig. 3 is a top view of a second embodiment of a PCB antenna of the LTE band of the present invention;
fig. 4 is a return loss diagram of the first embodiment.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The invention will now be further described with reference to the drawings and detailed description.
Example 1
As shown in fig. 1 and 2, the present invention provides a PCB antenna of an LTE band.
The main body of the PCB antenna is printed on a size substrate 1. The substrate is divided into a clearance area 11 and a functional area 12, a first antenna structure 2 is provided on the top surface of the substrate 1 by etching or the like, a second antenna structure 3 is provided on the bottom surface of the substrate by etching or the like, and the functional area 12 is provided with a ground plane.
In this embodiment, the first antenna structure 1 is an inverted L antenna, and for convenience of description, the first antenna structure is divided into multiple segments: a feed terminal ab, a radiator bc and a tuning section cd. The feed terminal ab is arranged close to the LTE module of the functional area; the radiator bc adopts a snake-shaped wiring and comprises a plurality of parallel line segments connected end to end; cd is a tuning section, the tuning section cd and the second antenna structure 3 have equal widths and equal lengths, are correspondingly distributed on the top surface and the bottom surface of the substrate 1, and are connected through the via holes 4 at two ends to form a ring-shaped circuit so as to adjust the bandwidth of the antenna and the flatness in the bandwidth.
In fig. 1 and 2, the size of the substrate is 25mm by 44mm, the thickness is 1mm, and the relative dielectric constant er=4.4. The specific parameters of the antenna are as follows:
Sx＝25mm；Sy＝11.5mm；
W1＝0.5mm；W2＝1mm；W3＝23.5mm；
H2＝4.5mm。
in this embodiment, the corresponding working frequency bands are B5 and B8 bands of LTE. The lowest working frequency of the B5 wave band and the B8 wave band is 824MHz, and the corresponding 1/4 wave length is 91.02mm; the highest operating frequency is 960MHz, and the corresponding 1/4 wavelength is 78.125mm. The difference al=12.97 mm of 1/4 wavelength corresponding to the lowest operating frequency and the highest operating frequency.
The total antenna length (i.e., ab segment + bc segment + cd segment) of the first antenna structure 2 is about 90mm, which is about 1.03 times the 1/4 wavelength corresponding to the lowest operating frequency of the B5 band.
The length W3 of the second antenna structure 3 is about l3=22.5 mm, about 1.73 times Δl.
The flatness of the working band interval can be widened through the adjustment of the second antenna structure positioned on the back surface, so that the working band interval can cover the B5 band and the B8 band simultaneously.
To facilitate impedance matching, the feeding end 21 of the first antenna structure 2 and the LTE module perform impedance matching and feeding by adding a planar transmission line with an impedance matching network. The matching network can adopt a series feed mode, a parallel feed mode or a mixed matching network mode which consists of a resistor, an inductor and a capacitor.
Example 2
As shown in fig. 3, in this embodiment, the first antenna structure may be a PIFA antenna, and the difference between the PIFA antenna and the inverted-L antenna is that a ground terminal ef close to the antenna feeding terminal ab is added. The ground terminal ef is directly connected to the ground plane of the LTE module.
3. Experimental results and analysis
To verify the validity of the PCB antenna in the LTE band, we processed a sample and measured the return loss, pattern, etc. parameters based on the antenna design dimensions given in example 1.
The measured return loss of the antenna is shown in fig. 4. From the graph, the measured return loss 10dB bandwidth of the antenna can cover the communication frequency bands (824 MHz-960 MHz) of the B5 wave band and the B8 wave band in the LTE wave band, and meets the design requirement (the total radiation power TRP (total radiated power) is more than or equal to 18dBm in the B5 wave band and the B8 wave band).
The above examples give two specific embodiments. According to the thought, the person skilled in the art can appropriately adjust each structural dimension of the antenna structure, for example, the line width W1 is 0.4 mm-0.6 mm, and the line width W2 is 0.8 mm-1.0 mm; the difference of Sx-W3 is between 1mm and 2 mm. And the distance between the radiator bc and the ground plane is ensured to be more than 4.5 mm; the ratio of the total length of the antenna of the first antenna structure 2 to the 1/4 wavelength corresponding to the lowest operating frequency is between 1 and 1.05, and the ratio of the length W3 of the second antenna structure 3 to the delta L is between 1.5 and 1.8.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. The PCB antenna of the LTE wave band is characterized by comprising a substrate, wherein the substrate is divided into a clearance area and a functional area, a first antenna structure is arranged on the top surface of the substrate in the clearance area, and a second antenna structure is arranged on the bottom surface of the substrate; the first antenna structure is an inverted L antenna or a PIFA antenna, and the second antenna structure is a line segment; the functional area is provided with a ground plane; the first antenna structure comprises a feed end, a radiator and a tuning section which are sequentially connected, and the feed end is arranged close to the ground plane; the radiator adopts a snake-shaped wiring and comprises a plurality of parallel line segments connected end to end; the second antenna structure corresponds to the tuning line segment and is symmetrically arranged on the top surface and the bottom surface of the substrate, and two ends of the second antenna structure and the tuning line segment are connected through a via hole to form an annular circuit.
2. The LTE band PCB antenna of claim 1, wherein the antenna supports at least two operating bands of the LTE band, a ratio of an antenna length of the first antenna structure to a quarter wavelength of a center frequency of the first operating band being 1-1.05; the ratio of the antenna length of the second antenna structure to the difference between the quarter central wavelength of the first working wave band and the quarter central wavelength of the second working wave band is 1.5-1.8; wherein the center frequency of the first operating band is lower than the center frequency of the second operating band.
3. The LTE band PCB antenna of claim 2, wherein the first operating band is a B5 band of the LTE band; the second working band is a B8 band of the LTE band.
4. A PCB antenna in the LTE band according to claim 3, wherein the height of the clearance area is between 11.5mm and 13.5mm, and the length of the clearance area is between 23mm and 25mm.
5. The PCB antenna of claim 4, wherein the linewidth of the radiator and the second antenna structure is 0.4 mm-0.6 mm, the linespacing of the radiator is 0.8 mm-1 mm, and the width of the radiator and the second antenna structure is 1 mm-2 mm less than the headroom length; the distance between the radiator and the ground plane is more than 4.5 mm.
6. The LTE band PCB antenna of claim 5, wherein the height of the headroom zone is 11.5mm, and the length of the headroom zone is 25mm; the line widths of the radiator and the second antenna structure are 0.5mm, the line spacing of the radiator is 1mm, and the widths of the radiator and the second antenna structure are 23.5mm; the radiator comprises four parallel line segments.
7. The LTE band PCB antenna of claim 3 wherein the substrate is an FR-4 substrate, the relative permittivity of the substrate is 4.4, and the thickness of the substrate is 1mm.
8. The LTE band PCB antenna of claim 1 wherein the feed end is connected to the functional area by a planar transmission line with an impedance matching network.
CN202310446290.1A 2023-04-24 2023-04-24 PCB antenna of LTE wave band Pending CN116231299A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310446290.1A CN116231299A (en) 2023-04-24 2023-04-24 PCB antenna of LTE wave band

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310446290.1A CN116231299A (en) 2023-04-24 2023-04-24 PCB antenna of LTE wave band

Publications (1)

Publication Number Publication Date
CN116231299A true CN116231299A (en) 2023-06-06

Family

ID=86584575

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310446290.1A Pending CN116231299A (en) 2023-04-24 2023-04-24 PCB antenna of LTE wave band

Country Status (1)

Country Link
CN (1) CN116231299A (en)

Similar Documents

Publication Publication Date Title
EP3726649B1 (en) Antenna module and electronic device
US20220255238A1 (en) Antenna module and electronic device
TW527754B (en) Dual-band planar antenna
US6982675B2 (en) Internal multi-band antenna with multiple layers
US7333067B2 (en) Multi-band antenna with wide bandwidth
US7755545B2 (en) Antenna and method of manufacturing the same, and portable wireless terminal using the same
TWI572095B (en) Enhanced high efficiency 3g/4g/lte antennas, devices and associated processes
US7847736B2 (en) Multi section meander antenna
US20050035919A1 (en) Multi-band printed dipole antenna
US8779988B2 (en) Surface mount device multiple-band antenna module
US20060284770A1 (en) Compact dual band antenna having common elements and common feed
US20080266181A1 (en) Antenna Arrangement
CN101055939A (en) Antenna device and wireless communication apparatus using same
GB2419237A (en) Multi-band antenna using interacting antenna elements including variable pitch coils and micro-strips
KR20040002993A (en) Dual band dipole antenna structure
EP2071668A1 (en) Antenna and wireless communication apparatus
US11456526B2 (en) Antenna unit, antenna system and electronic device
US20110221638A1 (en) Internal lc antenna for wireless communication device
US7598912B2 (en) Planar antenna structure
US8593368B2 (en) Multi-band antenna and electronic apparatus having the same
JP2007135212A (en) Multiband antenna apparatus
CN219917584U (en) PCB antenna of LTE wave band
CN112952362A (en) Integrated antenna and electronic device
US11811149B2 (en) Multi-band antenna
CN113540763B (en) Antenna and equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination