CN103855465A

CN103855465A - Monopole antenna

Info

Publication number: CN103855465A
Application number: CN201210510320.2A
Authority: CN
Inventors: 黄智勇; 罗国彰
Original assignee: Arcadyan Technology Corp
Current assignee: Arcadyan Technology Corp
Priority date: 2012-12-04
Filing date: 2012-12-04
Publication date: 2014-06-11
Anticipated expiration: 2032-12-04
Also published as: CN103855465B

Abstract

The invention discloses a monopole antenna, comprising: the antenna comprises an antenna body, a first radiating part and a second radiating part, wherein the second radiating part is provided with a feed-in signal end, the first radiating part respectively extends towards a first direction and a second direction to form a first length and a first width, the first direction is vertical to the second direction, and the first radiating part is adjacent to the second radiating part along the first direction; a dielectric part adjacent to the antenna body; and a grounding part adjacent to the medium part, wherein the medium part isolates the antenna body from the grounding part; the first length and the first width of the first radiation part are respectively adjusted to adjust the operating frequency and the frequency width of the antenna body, and the shape and the size of the second radiation part are adjusted to adjust the impedance matching of the antenna body.

Description

Unipole antenna

Technical field

The present invention relates to a kind of unipole antenna, relate in particular to an a kind of single-frequency unipole antenna that utilizes printing technology made.

Background technology

Now, the product of wireless transmission (such as mobile phone, mobile computer, wireless network card etc.) all needs to configure antenna to transmit and the work receiving.Use at the antenna of general radio transmitting device, often need to determine depending on size, characteristic and the cost in its space.The antenna that the radio transmitting device using at present uses can be divided into the kinds such as single-frequency, double frequency, multifrequency and wide frequency antenna according to the difference of frequency.Can be divided into two large classes according to the difference of structure in addition, the one, antenna component, another is printed antenna; Wherein antenna component has that required area is little, cost is high and the feature such as frequency range is narrower.And printed antenna is divided into unipole antenna, double-doublet antenna, planar inverted F-shape antenna and loop aerial etc. according to structure, it is characterized by that required area is large, cost is low and frequency range is wider, just in time contrary with antenna component.For example, structure is light and handy, transmission usefulness is good and can be set up easily planar inverted F-shape antenna (the planar inverse-F antenna of portable electric device inwall, hereinafter to be referred as PIFA) or unipole antenna (monopole antenna) exist, and be widely used in wireless transmission, mobile computer or the wireless communication apparatus of multiple portable electric device.

In conventional art, mostly the inner conductor layer of coaxial cable (coaxial cable) and peripheral conductors layer are welded in respectively to signal feed-in point and the signal ground point of PIFA, so that signal defeated tendency to develop is exported via PIFA.But the antenna bandwidth of PIFA is narrower, need do frequency range fine setting for different environment.And unipole antenna is one of the most traditional and the most classic Antenna Design, as shown in Figure 1.Traditional unipole antenna 1 shown in Fig. 1 must will have support portion 11 to engage with substrate 12, and in order to support and fixing unipole antenna 1, and unipole antenna 1 easily causes toward upper and lower, left and right and topple over, and is difficult for fixingly, and produces difficulty, increases production cost.

Therefore,, in view of aforesaid problem, can adjust easily to reach the demand of producing device therefore need the unipole antenna of proposition one novelty badly, to save cost.

Summary of the invention

One of object of the present invention is to provide a kind of unipole antenna, and it can adjust according to different environment, common to reach multisystem, and can effectively save cost payout.

Another object of the present invention is to provide a kind of unipole antenna, it can be printed on circuit board, to reduce die cost and the production and assembly cost of stereoscopic antenna.

A kind of unipole antenna provided by the invention, comprise: an antenna body, and this antenna body comprises one first Department of Radiation and one second Department of Radiation, this second Department of Radiation has a FD feed end, and this first Department of Radiation extends and has one first length to a first direction, this first Department of Radiation extends and has one first width to a second direction, and this first direction is vertical with this second direction, and this first Department of Radiation and this second Department of Radiation are along this first direction adjacency; One medium portion, is adjacent to this antenna body; And a grounding parts, be adjacent to this medium portion, and this medium portion isolates this antenna body and this grounding parts; Wherein, adjust this first length of this first Department of Radiation and then adjust the frequency of operation of this antenna body, adjust this first width of this first Department of Radiation and then adjust the operation frequency range of this antenna body, adjust the shape size of this second Department of Radiation and then adjust the impedance matching of this antenna body.

Preferably, this first Department of Radiation is a rectangular radiation portion, the length of this first Department of Radiation is rough equal in the frequency range of wish operation frequency of utilization resonant wavelength 1/4th.

Preferably, this antenna body comprises four length of sides, wherein three length of sides and this medium portion adjacency, this grounding parts is with set-up mode and this medium portion adjacency of corresponding above-mentioned three length of sides.

Preferably, this second Department of Radiation extends and has one second length to this first direction, and this second Department of Radiation extends and has one second width to this second direction, and this first length is greater than this second length, and this first width is greater than this second width.

Preferably, by adjusting this second length and/or this second width, and then adjust the impedance matching of this antenna body.

Preferably, by adjusting along one first distance between this first Department of Radiation and this grounding parts of first direction, and then adjust the impedance matching of this antenna body.

Preferably, by adjusting along the second distance between this second Department of Radiation and this grounding parts of first direction, and then adjust the impedance matching of this antenna body.

Preferably, this second distance is greater than this first distance.

Preferably, this second Department of Radiation is a reversed F-typed Department of Radiation, and adjusts the shape size of this reversed F-typed Department of Radiation, and then adjusts the impedance matching of this antenna body.

Preferably, this second Department of Radiation is a reversed F-typed Department of Radiation, also comprise one first extension and one second extension that extend along second direction toward grounding parts, wherein this first extending part is in the end of this second Department of Radiation, this second extending part is between this first extension and this first Department of Radiation, utilize the size of adjusting this first extension and/or this second extension, and then adjust the impedance matching of this antenna body.

Preferably, between this first extension and the second extension, form one first slotted eye, between this second extension and this first Department of Radiation, form one second slotted eye, utilize the size of adjusting this first slotted eye and/or this second slotted eye, and then adjust the impedance matching of this antenna body.

Preferably, the second extension also comprises this FD feed end, and it is in order to receive the FD feed of this unipole antenna.

Preferably, also comprise a printed circuit board (PCB), it comprises a corresponding first surface and a second surface, and this antenna body, this medium portion and this grounding parts are located at this first surface altogether, and this antenna body projection does not arrange any circuit or element in the region of this second surface.

Preferably, this antenna body is arranged at the arbitrary edge in abutting connection with this printed circuit board (PCB).

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Brief description of the drawings

Fig. 1 shows traditional unipole antenna;

Fig. 2 shows according to a unipole antenna of one embodiment of the invention.

Wherein, Reference numeral

1 unipole antenna

11 support portions

12 substrates

2 printed circuit board (PCB)s

2a first surface

2b second surface

21 antenna bodies

22 medium portions

23 grounding parts

211 first Departments of Radiation

212 second Departments of Radiation

212a the first extension

212b the second extension

L1, L2 length

D1, D2 distance

W1, W2 width

H1, H2 slotted eye

F1 FD feed end

Embodiment

Below in conjunction with accompanying drawing, structural principle of the present invention and operation principle are described in detail:

For feature of the present invention, object and function being had to further cognitive and understanding, below spy describes the theory reason of the relevant thin portion structure of device of the present invention and design, so that feature of the present invention, detailed description is presented below:

Fig. 2 shows according to a unipole antenna of one embodiment of the invention, and this unipole antenna is located at a printed circuit board (PCB) 2, and this printed circuit board (PCB) 2 has a corresponding first surface 2a and a second surface 2b.This unipole antenna comprises: an antenna body 21, a medium portion 22 and a grounding parts 23, and this antenna body 21, this medium portion 22 and this grounding parts 23 are located at a first surface 2a of this printed circuit board (PCB) 2 jointly, and this antenna body projection does not arrange any circuit or element in the region of this second surface 2b.This antenna body 21 can be arranged at arbitrary edge of contiguous this printed circuit board (PCB) 2.

Antenna body 21 comprises one first Department of Radiation 211 and one second Department of Radiation 212, this second Department of Radiation 212 has a FD feed end F1, and this first Department of Radiation 211 extends to a first direction, there is one first length L 1, this first Department of Radiation 211 extends to a second direction, have one first width W 1, this first direction is vertical with this second direction is rough, and this first Department of Radiation 211 is along this first direction adjacency with this second Department of Radiation 212.Wherein, this first length L 1 of this first Department of Radiation 211 of capable of regulating and then adjust the frequency of operation of this antenna body 21, adjust this first width W 1 of this first Department of Radiation 211 and then adjust the operation frequency range of this antenna body 21, adjust the shape size of this second Department of Radiation 212, and then adjust the impedance matching of this antenna body 21.Further, this second Department of Radiation 212 extends and has one second length L 2 to this first direction, this second Department of Radiation 212 extends and has one second width W 2 to this second direction, therefore, adjusts the impedance matching of this second length L 2 or second this antenna body 21 of width W 2 capable of regulatings.In addition, in the present embodiment, this first length L 1 is greater than this second length L 2, and this first width W 1 is greater than this second width W 2.In addition, this second Department of Radiation 212 can be a reversed F-typed Department of Radiation, and adjusts the shape size of this reversed F-typed Department of Radiation, and then adjusts the impedance matching of this antenna body 21.

This medium portion 22, be adjacent to this antenna body 21, and this grounding parts 23 is adjacent to this medium portion 22, and this medium portion 22 isolation this antenna body 21 and this grounding parts 23.This first Department of Radiation 211 is an approximate rectangular structure, and adjust along one first distance B 1 between this first Department of Radiation 211 and this grounding parts 23 of this first direction, and/or adjust along the second distance D2 between this second Department of Radiation 212 and this grounding parts 23 of this first direction, and then adjust the impedance matching of this antenna body, and this second distance D2 is greater than this first distance B 1.

This second Department of Radiation 212 also comprises the one first extension 212a and the one second extension 212b that extend toward this grounding parts 23 along this second direction, and this first extension 212a is positioned in the end of this second Department of Radiation 212, the second extending part 212b is between this first extension 212a and this first Department of Radiation 211, utilize the size of adjusting this first extension 212a and/or this second extension 212b, and then adjust the impedance matching of this antenna body.And this second extension 212b is longer than this first extension 212a in the present embodiment, and its width is also wide than this first extension 212a.This second extension 212b also comprises this FD feed end F1, and for a corresponding FD feed point or couple a transmission line (not shown), and this FD feed end F1 can be in order to receive the FD feed of this unipole antenna.

Between this first extension 212a and the second extension 212b, form one first slotted eye H1, between this second extension 212b and this first Department of Radiation 211, form one second slotted eye H2, utilize the size of adjusting this first slotted eye H1 and/or this second slotted eye H2, and then adjust the impedance matching of this antenna body 21.

In addition, this antenna body 21 comprises four length of sides, wherein three length of sides and this medium portion 22 adjacency, and this grounding parts 23 is with set-up mode and this medium portion 22 adjacency of corresponding above-mentioned three length of sides.The material of aforesaid grounding parts 23 comprises metal.This unipole antenna is a single-frequency unipole antenna, and this single-frequency unipole antenna for example, for a field of wireless communication, between IEEE 802.11a/b/c/g or single-frequency 5.15 ~ 5.85GHz.

In the present embodiment, this printed circuit board (PCB) 2 can be a dielectric medium substrate, one surface of this dielectric medium substrate is used for arranging this unipole antenna, and this surface is also provided with grounding metal plane (three ply board) or completely without metal (doubling plate), and another surface of this dielectric electrode substrate is corresponding to the position of microstrip line, and do not print grounding metal plane.This second extension 212b of antenna body 21 of the present invention can be used as signal feed side, and this first extension 212a is to doing to extend by grounding parts 23.And this first length L 1 of this first Department of Radiation 211 of this antenna body 21 can roughly equal 1/4th length of frequency of utilization resonant wavelength in the frequency range of wish design, therefore this first Department of Radiation 211 can be used as the emission band signal of this unipole antenna.And this second length L 2 of this second Department of Radiation 212 can be adjusted, and then adjust the impedance matching of this unipole antenna, make the voltage standing wave ratio (VSWR) of antenna can reach specification and the requirement of industry.In addition, unipole antenna of the present invention need not be other just like PIFA antenna lower end, so size can be little than PIFA antenna, and unipole antenna signal feed-in mode of the present invention can be directly on circuit board with the transmission line mode feed-in of 50 Ω, exempt the feed-in cost that uses cable, and exempt die cost and the assembly cost of the required burden of three-dimensional antenna.

In-building type unipole antenna of the present invention is applicable to any radio communication product, and can adjust easily and revise, to reach the demand of product, and the present invention also can be applicable to the system of operation frequency range at WiFi 802.11a (5.15 ~ 5.85GHz), such as mobile computer, mobile phone or the TV or the DVD etc. that comprise WiFi.Printing type monopole antenna of the present invention except can shared by multiple systems, also can directly print on circuit board, so can reduce the die cost expenditure of stereoscopic antenna and the cost of production and assembly.

Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims

1. A monopole antenna, characterized in that, comprising:

An antenna body, and the antenna body includes a first radiating portion and a second radiating portion, the second radiating portion has a feed-in signal end, and the first radiating portion extends toward a first direction with a first length , the first radiating portion extends toward a second direction with a first width, the first direction is perpendicular to the second direction, and the first radiating portion and the second radiating portion are adjacent along the first direction;

a dielectric portion adjacent to the antenna body; and

a ground part, adjacent to the dielectric part, and the dielectric part isolates the antenna body and the ground part;

Wherein, adjusting the first length of the first radiating portion further adjusts the operating frequency of the antenna body, adjusting the first width of the first radiating portion further adjusts the operating bandwidth of the antenna body, and adjusting the operating frequency of the second radiating portion The shape and size further adjust the impedance matching of the antenna body.

2. The monopole antenna according to claim 1, wherein the first radiating portion is an approximately rectangular structure, and a first distance between the first radiating portion and the grounding portion along the first direction is adjusted. distance, and/or adjust a second distance between the second radiating part and the ground part along the first direction, and then adjust the impedance matching of the antenna body, and the second distance is greater than the first distance.

3. The monopole antenna according to claim 1, wherein the second radiating part is an inverted F-shaped radiating part, and the shape and size of the inverted F-shaped radiating part are adjusted to further adjust the impedance matching of the antenna body .

4. The monopole antenna according to claim 1, wherein the second radiating portion extends toward the first direction with a second length, and the second radiating portion extends toward the second direction with a second width , and the first length is greater than the second length, and the first width is greater than the second width.

5. The monopole antenna according to claim 1, wherein the second radiating portion further comprises a first extending portion and a second extending portion extending toward the ground portion along the second direction, and the first extending portion part is located at one end of the second radiating part, and the second extending part is located between the first extending part and the first radiating part, by adjusting the size of the first extending part and/or the second extending part, and then adjusting The impedance of the antenna body is matched.

6 . The monopole antenna according to claim 5 , wherein the second extension part further comprises the feed-in signal end, which is used for receiving the feed-in signal of the monopole antenna. 7 .

7. The monopole antenna according to claim 5, wherein a first slot is formed between the first extending portion and the second extending portion, and a first slot is formed between the second extending portion and the first radiating portion. The second slot is used to adjust the size of the first slot and/or the second slot to adjust the impedance matching of the antenna body.

8. The monopole antenna according to claim 1, further comprising a printed circuit board and a corresponding first surface and a second surface, wherein the antenna body, the dielectric portion and the ground portion are commonly arranged on the first surface of the printed circuit board.

9 . The monopole antenna according to claim 8 , wherein the projected area of the antenna body on the second surface is not provided with any circuit or component. 10 .

10. The monopole antenna according to claim 8, the antenna body is disposed adjacent to any edge of the printed circuit board.

11. The monopole antenna according to claim 1, wherein the monopole antenna is a single-frequency monopole antenna, and the single-frequency monopole antenna is used in a wireless communication field.