CN106961015B - Built-in FM antenna - Google Patents
Built-in FM antenna Download PDFInfo
- Publication number
- CN106961015B CN106961015B CN201710213929.6A CN201710213929A CN106961015B CN 106961015 B CN106961015 B CN 106961015B CN 201710213929 A CN201710213929 A CN 201710213929A CN 106961015 B CN106961015 B CN 106961015B
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- antenna
- built
- mobile terminal
- pcb
- main board
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- 238000009434 installation Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- 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
Landscapes
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses a built-in FM antenna, and belongs to the technical field of antennas. The built-in FM antenna is applied to a mobile terminal, and the built-in FM antenna adopts a PCB form or an SMT form. Because the built-in FM antenna adopts the PCB form or the SMT form, and the PCB form FM antenna and the SMT form FM antenna occupy smaller space in the mobile terminal, and are convenient to install and low in cost, the built-in FM antenna provided by the embodiment of the invention can save the occupied space in the mobile terminal while meeting the functions of an FM radio, and has the characteristics of convenient installation and low cost.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a built-in FM antenna.
Background
FM (frequency modulation) radio functions are very popular in many portable electronic products and become a standard configuration function for audio and video and communication products. The civil FM frequency band is 76MHz-108MHz, the wavelength is about 3 meters at the maximum, the corresponding receiving antenna size is about 1 meter, the early built-in FM antenna mostly adopts external type, such as a metal telescopic rod antenna, a spiral antenna, an earphone wire and the like, but is gradually replaced by the built-in antenna due to inconvenient installation and carrying.
Along with the increasing integration level of chips, portable electronic products such as mobile phones and the like have various functions and miniaturization, the mobile phones need to integrate a plurality of antennas in a limited space, if effective receiving and transmitting are realized, the built-in FM antenna needs to be large in size, the space requirement on the built-in FM antenna is large, and the built-in FM antenna with better performance is difficult to design in a limited space range at present.
Disclosure of Invention
In order to solve the problems in the prior art, the embodiment of the invention provides a built-in FM antenna which can save the occupied space in a mobile terminal while meeting the functions of an FM radio. The technical scheme is as follows:
in a first aspect, a built-in FM antenna is provided for use in a mobile terminal, the built-in FM antenna being in PCB form or SMT form.
With reference to the first aspect, in a first possible implementation manner, the housing of the mobile terminal is provided with a slot, and the built-in FM antenna in the form of a PCB is placed in the slot on one side and is parallel to and close to one side of the mobile terminal.
With reference to the first aspect, in a second possible implementation manner, two ends of the built-in FM antenna are respectively provided with a bonding pad, and the built-in FM antenna is connected with a circuit motherboard of the mobile terminal through a feeder line welded to one of the bonding pads.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, a matching device is further disposed between the built-in FM antenna and the circuit motherboard, and the matching device includes an inductor.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, the inductance is 300nh±50nH.
With reference to the second possible implementation manner of the first aspect, in a fifth possible implementation manner, the internal FM antenna further includes an extension wire, one end of the extension wire is welded to the other pad, and the other end of the extension wire is disposed in an open manner.
With reference to the first aspect, in a sixth possible implementation manner, the built-in FM antenna reserves a clearance space.
With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the headroom area is set on at least one side of an upper side, a lower side, a left side, and a right side of the internal FM antenna.
With reference to the first aspect, in an eighth possible implementation manner, a distance between the built-in FM antenna and other antenna radiating elements in the mobile terminal is greater than 5mm.
With reference to the first aspect to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner, a size of the internal FM antenna is 25×5×0.8mm 3 。
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
because the built-in FM antenna adopts the PCB form or the SMT form, and the PCB form FM antenna and the SMT form FM antenna occupy smaller space in the mobile terminal, and are convenient to install and low in cost, the built-in FM antenna provided by the embodiment of the invention can save the occupied space in the mobile terminal while meeting the functions of an FM radio, and has the characteristics of convenient installation and low cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of a built-in FM antenna in the form of a PCB according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a three-dimensional structure of a built-in FM antenna in SMT mode according to an embodiment of the present invention;
fig. 3 is a schematic top view of a built-in FM antenna according to an embodiment of the invention;
fig. 4 is a schematic top view of a built-in FM antenna according to an embodiment of the invention;
fig. 5 is a schematic diagram of a size and a structure of a built-in FM antenna according to an embodiment of the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the invention provides a built-in FM antenna which adopts a PCB form or an SMT form, can be applied to mobile terminals such as mobile phones and the like to meet the FM radio function of the mobile terminals, can save occupied space in the mobile terminals, and has the characteristics of convenient installation and lower cost.
The built-in FM antenna is applied to a mobile terminal, and the built-in FM antenna adopts a PCB form or an SMT form. The mobile terminal may be other mobile terminals besides a mobile phone, such as a personal digital assistant, a tablet computer, a game controller, a wearable device, etc.; wherein, the plane shape of the built-in FM antenna is rectangular.
Referring to fig. 1, fig. 1 is a schematic perspective view of a built-in FM antenna in a PCB according to an embodiment of the present invention, and the built-in FM antenna 10 in a PCB is disposed in a mobile terminal 20, wherein the mobile terminal 20 includes a housing 21, the housing 21 is provided with a slot 211, and the built-in FM antenna 10 is disposed in the slot 211 in a side-by-side manner and parallel to one side surface of the mobile terminal 20. The clamping groove 211 is formed by a clamping plate arranged on the shell 21 and one side face of the mobile terminal 20 parallel to the clamping plate, the length of the clamping groove 211 is close to that of the built-in FM antenna, and the built-in FM antenna 10 is fixed in the clamping groove 211.
Referring to fig. 2, fig. 2 is a schematic perspective view of an SMT-type internal FM antenna according to an embodiment of the present invention, where the internal FM antenna 10 in the form of a PCB is directly attached to a circuit board 22 in the mobile terminal 20, where the circuit board 22 is a printed circuit board, and a position capable of soldering the internal FM antenna is reserved on the circuit board 22.
In the embodiment, the built-in FM antenna adopts the PCB form or the SMT form, and the PCB form FM antenna and the SMT form FM antenna occupy smaller space inside the mobile terminal and are convenient to install and low in cost, so that the built-in FM antenna provided by the embodiment of the invention can occupy the space inside the mobile terminal while meeting the FM radio function and has the characteristics of convenient installation and low cost.
Further, both ends of the built-in FM antenna 10 are respectively provided with pads 11, and the built-in FM antenna 10 is connected to the circuit board 22 of the mobile terminal 20 through a feeder line 30 soldered to one of the pads 11.
Referring to fig. 3, fig. 3 is a schematic top view of a built-in FM antenna according to an embodiment of the present invention, and a feeder 30 connected to a circuit board 22 is soldered to a pad 11 near the circuit board 22; the circuit board 22 comprises an FM chip 221, the built-in FM antenna 10 is connected with the FM chip 221 on the circuit board 22 through a feeder line 30, wherein the feeder line 30 is made of thinner and softer materials so as to be convenient to bend and place, and the length of the feeder line 30 can be adjusted according to requirements.
In this embodiment, the RF signal received by the built-in FM antenna is transmitted to the circuit board through the feeder line, so that the FM chip on the circuit board can adjust the RF signal to an FM signal, and then the FM signal is restored to sound through the speaker of the mobile terminal, so as to realize the FM radio function of the mobile terminal.
Further, referring to fig. 3, a matching device 40 is further disposed between the built-in FM antenna 10 and the circuit board 22, and the matching device 40 includes an inductor, where the matching device is used to form a pi-type matching circuit. The inductance is connected in series between the built-in FM antenna and the circuit board 22 via a feed line 30. Preferably, the inductance is 300nh±50nH, and in practical application, a large inductance with an inductance value of 300nH may be used.
In this embodiment, by providing the matching device between the built-in FM antenna and the circuit board, the pi-type matching circuit is formed by the matching device, so that impedance matching between the built-in FM antenna and the circuit board of the mobile terminal can be achieved.
It should be noted that the matching device is not limited to using an inductance in series, and in other embodiments, the matching device may be configured as a capacitance in series, so as to enable impedance matching between the built-in FM antenna and the circuit board of the mobile terminal. Of course, the number of the matching devices may be changed as required, for example, the matching devices may be two inductors connected in parallel or two capacitors connected in parallel. The invention is not particularly limited with respect to the type and number of particular matching devices.
Further, referring to fig. 4, fig. 4 is a schematic top view of the built-in FM antenna according to the embodiment of the invention, the built-in FM antenna 10 further includes an extension wire 50, one end of the extension wire 50 is welded to the other bonding pad 11, and the other end of the extension wire 50 is disposed in an open manner.
Wherein, the extension wire 50 may form a multi-fold line winding, and may be wound or not wound on the internal FM antenna 10, and the extension wire 50 may be made of the same material as the feeder line 30, and the material may be a metal material with better conductivity, such as copper, aluminum, silver, etc., and in practical application, the material of the extension wire 50 may be a copper wire, so as to reduce cost.
In this embodiment, an extension line with an open end is added on the built-in FM antenna, and through this extension line, the electrical length of the antenna can be further increased, and at the same time, the volume of the antenna is reduced, so that the internal space of the occupied mobile terminal is further saved; in addition, the signal receiving capability of the built-in FM antenna can be further enhanced through the extension wire.
It should be noted that the built-in FM antenna does not necessarily include an extension line, but the extension line may be optionally added according to practical needs, for example, when the built-in FM antenna is disposed in a different mobile terminal, there may be a case that the built-in FM antenna has poor signal receiving capability, so that the signal receiving capability of the built-in FM antenna may be further enhanced by adding an extension line with a development terminal to the built-in FM antenna.
Further, the built-in FM antenna 10 reserves a clearance area. Preferably, the headroom region is provided on at least one side of the upper side, the lower side, the left side, and the right side of the built-in FM antenna. Wherein the range of the clearance area is a region which is 2-3 mm away from the built-in FM antenna. The clear area refers to the situation that any device and grounding wire are not required to be arranged around the built-in FM antenna and on the vertical projection plane.
In this embodiment, the clearance area is reserved in the built-in FM antenna, so as to avoid affecting the capability of the built-in FM antenna to receive signals, thereby further ensuring that the built-in FM antenna can satisfy the FM radio function.
Further, the distance between the built-in FM antenna 10 and other antenna radiating elements in the mobile terminal 20 is greater than 5mm, so that crosstalk between signals between the built-in FM antenna and other antenna radiating elements in the mobile terminal 20 can be avoided, the capability of the built-in FM antenna to receive signals is affected, and the built-in FM antenna can further meet the FM radio function of the mobile terminal.
Further, the size of the internal FM antenna 10 is 25×5×0.8mm 3 Referring to fig. 5, fig. 5 is a schematic diagram of a dimension structure of a built-in FM antenna according to an embodiment of the present invention, wherein a length a of the built-in FM antenna 10 ranges from 25.1mm±0.3mm, a width b ranges from 5.1mm±0.3mm, a thickness c ranges from 0.8mm±0.2mm, and a width d of the bonding pad 11 ranges from 0.8mm±0.25mm. Since the size of the built-in FM antenna 10 is 25×5×0.8mm 3 The volume is smaller, thus the built-in FM antenna is arranged in the mobile terminal, and occupied mobile terminal can be saved to the greatest extentIs convenient to install.
According to the built-in FM antenna provided by the embodiment of the invention, the built-in FM antenna adopts the PCB form or the SMT form, and the PCB form FM antenna and the SMT form FM antenna occupy smaller space in the mobile terminal and are convenient to install and low in cost, so that the built-in FM antenna provided by the embodiment of the invention can save occupied space in the mobile terminal while meeting the functions of an FM radio, and has the characteristics of convenience in installation and low cost.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present invention, which is not described herein.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (2)
1. A built-in FM antenna applied to a mobile terminal, which is characterized in that the built-in FM antenna adopts a PCB form or an SMT form;
the shell of the mobile terminal is provided with a clamping groove, and the built-in FM antenna in the form of a PCB is laterally placed in the clamping groove and is parallel to and close to one side surface of the mobile terminal; the dimension of the built-in FM antenna is 25 x 5 x 0.8mm 3 ；
The two ends of the built-in FM antenna are respectively provided with a bonding pad, and the built-in FM antenna is connected with a circuit main board of the mobile terminal through a feeder line welded to one bonding pad;
a matching device is further arranged between the built-in FM antenna and the circuit main board, the matching device comprises an inductor, and the inductor is connected in series between the built-in FM antenna and the circuit main board through the feeder line; the matching device is used for forming a pi-type matching circuit so as to match impedance between the built-in FM antenna and a circuit main board of the mobile terminal;
the inductance is 300 nH+/-50 nH;
the built-in FM antenna reserves a clearance area, and the range of the clearance area is an area which is 2-3 mm away from the built-in FM antenna; the clearance area is around the built-in FM antenna and the vertical projection plane does not comprise any device or any grounding wire;
the built-in FM antenna further comprises an extension wire, one end of the extension wire is welded to one of the bonding pads, and the other end of the extension wire is arranged in an open mode;
the distance between the built-in FM antenna and other antenna radiating units in the mobile terminal is greater than 5mm.
2. The internal FM antenna of claim 1, wherein the headroom region is provided on at least one of an upper side, a lower side, a left side, and a right side of the internal FM antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710213929.6A CN106961015B (en) | 2017-04-01 | 2017-04-01 | Built-in FM antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710213929.6A CN106961015B (en) | 2017-04-01 | 2017-04-01 | Built-in FM antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106961015A CN106961015A (en) | 2017-07-18 |
| CN106961015B true CN106961015B (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710213929.6A Active CN106961015B (en) | 2017-04-01 | 2017-04-01 | Built-in FM antenna |
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| Country | Link |
|---|---|
| CN (1) | CN106961015B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200941423Y (en) * | 2006-08-25 | 2007-08-29 | 上海安岗通讯电子有限公司 | Antenna structure |
| CN101938034A (en) * | 2010-07-06 | 2011-01-05 | 惠州Tcl移动通信有限公司 | Built-in FM antenna as well as mobile phone device and production method thereof |
| KR20110065722A (en) * | 2009-12-10 | 2011-06-16 | 주식회사 아이엠텍 | Embeded vhf antenna with magneto-dielectric block |
| CN202150542U (en) * | 2011-06-21 | 2012-02-22 | 无锡海极电子科技有限公司 | Active FM antenna possessing impedance match function |
| CN202159763U (en) * | 2011-06-21 | 2012-03-07 | 无锡海极电子科技有限公司 | Square wave-shaped active FM (frequency modulation) antenna of antenna radiating body |
| CN207124282U (en) * | 2017-04-01 | 2018-03-20 | 禾邦电子(苏州)有限公司 | A kind of application structure of built-in FM antennas on mobile terminals |
-
2017
- 2017-04-01 CN CN201710213929.6A patent/CN106961015B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200941423Y (en) * | 2006-08-25 | 2007-08-29 | 上海安岗通讯电子有限公司 | Antenna structure |
| KR20110065722A (en) * | 2009-12-10 | 2011-06-16 | 주식회사 아이엠텍 | Embeded vhf antenna with magneto-dielectric block |
| CN101938034A (en) * | 2010-07-06 | 2011-01-05 | 惠州Tcl移动通信有限公司 | Built-in FM antenna as well as mobile phone device and production method thereof |
| CN202150542U (en) * | 2011-06-21 | 2012-02-22 | 无锡海极电子科技有限公司 | Active FM antenna possessing impedance match function |
| CN202159763U (en) * | 2011-06-21 | 2012-03-07 | 无锡海极电子科技有限公司 | Square wave-shaped active FM (frequency modulation) antenna of antenna radiating body |
| CN207124282U (en) * | 2017-04-01 | 2018-03-20 | 禾邦电子(苏州)有限公司 | A kind of application structure of built-in FM antennas on mobile terminals |
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| Publication number | Publication date |
|---|---|
| CN106961015A (en) | 2017-07-18 |
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