CN107706507A - Dual-band antenna - Google Patents
Dual-band antenna Download PDFInfo
- Publication number
- CN107706507A CN107706507A CN201610454771.7A CN201610454771A CN107706507A CN 107706507 A CN107706507 A CN 107706507A CN 201610454771 A CN201610454771 A CN 201610454771A CN 107706507 A CN107706507 A CN 107706507A
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- radiant body
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- 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
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- 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
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Abstract
A kind of dual-band antenna, include first antenna portion and the second antenna part.Dual-band antenna is used for the resonance signal of feed-in first and the second resonance signal, wherein the frequency of the second resonance signal is more than the frequency of the first resonance signal.First antenna portion includes：First radiant section and the second radiant section, the second antenna part further include the first sub- radiant body and the second sub- radiant body.Second radiant section and the first intersegmental formation angle of radiation.The length of first radiant section and the second radiant section corresponds respectively to the wavelength of the second resonance signal and the wavelength of the first resonance signal.Second sub- radiant body is arranged between first antenna portion and the first sub- radiant body.In addition, the length for being shorter in length than the second radiant section of the second antenna part.
Description
Technical field
The present invention relates to a kind of dual-band antenna, and the double frequency coupling pole day of more particularly to a kind of bandwidth for improving resonance signal
Line.
Background technology
With the fast development of network technology, radio communication is combined closely with the life of most people.Also therefore, have
The portable type electronic product for having radio communication function also turns into the main flow in market.In order to provide radio communication function, portable electric
Sub- product needs to set antenna by built-in or external mode, and receives the radio frequency (radio from outside by antenna
Frequency) signal.Based on compact consideration, portable type electronic product must use the Antenna Design of miniaturization, to the greatest extent may be used
The size of the diminution antenna body of energy.
Because radio communication Related product more and more emphasizes practicality with technical, multiband, the demand of wideband are also reflected should
And give birth to.Therefore, portable type electronic product needs to support various wireless communication standard.Jointly, portable type electronic product is used
Small size antenna also allow for radiofrequency signal for receiving different frequency range.
The content of the invention
The present invention relates to a kind of dual-band antenna, and more particularly to a kind of double frequency doublet for improving bandwidth.The present invention
Dual-band antenna improve the bandwidth of low-frequency range resonance signal by coupled structure, and be total to improve high band by hypotenuse section
Shake the bandwidth of signal.
According to an aspect of the invention, it is proposed that a kind of dual-band antenna, believes for the resonance signal of feed-in first and the second resonance
Number, wherein the frequency of the second resonance signal is higher than the frequency of the first resonance signal.Dual-band antenna includes：First antenna portion and second
Antenna part.First antenna portion further includes：The first radiant section and the second radiant section being connected to each other, the first radiant section and
Two radiation the first angle of intersegmental formation.The length of first radiant section corresponds to the wavelength of the second resonance signal；And second radiation
The length of section corresponds to the wavelength of the first resonance signal.Second antenna part includes：One first sub- radiant body and the second sub- radiant body.
First sub- radiant body includes coupling section with extension of section.Extension of section and the second angle of the intersegmental formation in coupled zone.Second sub- spoke
Beam is arranged between first antenna portion and the first sub- radiant body, and at least a portion of the second sub- radiant body is parallel to coupled zone
Section.
More preferably understand to have to the above-mentioned and other aspect of the present invention, preferred embodiment cited below particularly, and coordinate attached
Figure, is described in detail below：
Brief description of the drawings
Fig. 1, the schematic diagram for the dual-band antenna that its present invention conceives.
Fig. 2, the schematic diagram of the length configuration in the first antenna portion of its dual-band antenna.
Fig. 3 A, 3B, it is the schematic diagram of the first radiant section of different aspects.
Fig. 4 A, 4B, 4C, 4D, it is the schematic diagram of the second radiant section of different aspects.
Fig. 5, it is the schematic diagram of the length configuration of the second antenna part of dual-band antenna.
Fig. 6 A, 6B, it is the schematic diagram of the first sub- radiant body of different aspects.
Fig. 7 A, 7B, it is the schematic diagram of the second sub- radiant body of different aspects.
Fig. 8, it is the schematic diagram of the embodiment for the dual-band antenna conceived according to the present invention.
Fig. 9 A, 9B, 9C, it is the schematic diagram of the thin portion explanation to the dual-band antenna shown in Fig. 8.
Figure 10 A, 10B, the schematic diagram of current path when it is the dual-band antenna feed-in control signal of the present invention.
【Symbol description】
The double frequency doublet 1,2 of substrate 10
First load point 15a, 25a second load point 15b, 25b
First antenna portion 11,21
First radiant section 111,311,312,211
Second radiant section 112,411,412,413,414,212
Second antenna part 12,22
First sub- radiant body 121,621,622,221
Couple section 121a, 6211,6221,221a
Second extension of section 121b, 221b
Second sub- radiant body 122,721,722,222
The length L1 in spacing d1, d2, d3, d4, d5 first antenna portion
The length L12 of the radiant sections of length L11 second of first radiant section
Angle α 1, α 2, α 3, α 4, β 1, β 2
Hypotenuse section 3111,3121,211a
Straight flange section 3122, the first extensions of section of 211b 4111,4131
Away minor segment 412a, 412b, 412c, 412c, 412d, 412e, 4141a, 4141b, 4141c, 4141d, 4141e,
6222a、6222b、6222c、6222d
The length L2 of perpendicular segment 4132,4,142 second antenna parts
The length L21a of the parallel sections of length L21 of first sub- radiant body
The length L21b of second extension of section
Length L22 long side sections 721a, 722a of second sub- radiant body
Short side section 722b coaxial cables 27
RF receiving and transmission module 29
Width w1, w2, w3, w4, w5, w6, w7
The electric current CP12 of the one the first electric current CP11 the one the second
The electric current CP22 of the two the first electric current CP21 the two the second
Embodiment
The application of multiband has become necessary consideration during designing antenna.If the wireless signal of portable type electronic product passes
The defeated module integrated 802.11b and 802.11a specifications of WLAN (Wireless LAN) standard, then its antenna structure
Or circuit must be designed to apply in two kinds of different operation frequencies of 2.4GHz and 5GHz.It is such a to can be used for receiving different frequency range
The antennas of wireless communication signals be referred to as dual-band antenna (Dual Band Antenna).
When designing dual-band antenna, the outward appearance of dual-band antenna must is fulfilled for the condition of resonance, could be used for feed-in resonance letter
Number.Hereinafter be 2.4GHz with the frequency (the first resonant frequency f1) of the first resonance signal, (second is common for the frequency of the second resonance signal
Vibration frequency f2) it is that 5GHz is example, illustrate how the present invention designs the parameter related to dual-band antenna.But during practical application,
Still can be according to the frequency of different resonance signals, convert length, the angle for drawing and how adjusting with replacement design dual-band antenna
Etc. parameter.
When the length of the radiant body of dual-band antenna is, for example, the integral multiple of 1/4 wavelength of resonance signal, it may achieve resonance
Condition, and resonant conditions can be mutually matched radiation body antenna and feeding portion.Therefore, the application is for frequency is 2.4GHz the
One resonance signal, the application with frequency for 5GHz the second resonance signal, according to the first resonant wavelength λ 1 a quarter (1/4*
λ 1=12.5cm/4=31.25 millimeters (millimeter, referred to as mm)), a quarter (1/4* with the second resonant wavelength λ 2
λ 2=6cm/4=15mm) and design the length parameter related to dual-band antenna.In addition, antenna length may be designed in and 1/
1* λ 1,1/1* λ 2,1/2* λ 1 or 1/2* λ 2 are related.
Fig. 1 is referred to, the schematic diagram for the double frequency doublet that its present invention conceives.It is arranged at the double frequency coupling pole day of substrate 10
Line 1 includes：First load point 15a, the second load point 15b, the antenna part 12 of first antenna portion 11 and second.In following explanation
In, the radiant body in first antenna portion 11 is represented with the net bottom of vertical direction, the second antenna part 12 is represented with the net bottom of ruling shape
Radiant body, wherein, and different sections is divided with the dotted line of extrabold.It must be noted that, be divided by extrabold dotted line each
Between section, still it is connected to each other.
For purposes of illustration only, it is assumed herein that substrate 10 has a rectangular appearance, its long side is short parallel to x directions (first direction)
Side is then parallel to y directions (second direction).Substrate 10 can be single-clad board, bilayer or the multilayer print of glass fibre material
Printed circuit board etc..The radiant body of double frequency doublet 1 uses metal conductive materials.If substrate 10 is double-deck or multilayer printed circuit
Plate, then other sides corresponding in the position of double frequency doublet 1 can not be formed, any metal structure is set, to avoid double frequency
Doublet 1 is disturbed in feed-in resonance signal by his side.
As shown in figure 1, the radiant body of the present invention is the design based on strip, therefore, the length of the side of radiant body is about
Equal to the length of its center line.Convenience based on wiring considers that the width of radiant body is roughly equal, such as width may be designed as
First resonant wavelength λ 1 one thousandth times, 12.5cm/1000=0.125mm.
According to an embodiment of the invention, first antenna portion 11 only includes a radiant body；Second antenna part 12 includes two
The the first sub- radiant body 121 parallel to each other for being separated by a small distance, the second sub- radiant body 122.Wherein, the second sub- radiant body 122
Position between 11 and first sub- radiant body 121 of first antenna portion, and the length of the second sub- radiant body 122 is compared with first antenna portion 11
It is short with the first sub- radiant body 121.In addition, the spacing d1 between the second sub- radiant body 122 and first antenna portion 11 must be more than or wait
In 1mm.
First antenna portion 11 can be divided into two parts, the first radiant section 111 and the second radiant section 112.Wherein, the second spoke
Penetrating between the radiant section 111 of section 112 and first has an angle α 1.In the second antenna part 12, the first sub- radiant body 121 can be further
It is divided into coupling section 121a and the second extension of section 121b.Wherein, between coupling section 121a and the second extension of section 121b
There is an angle β 1.According to the conception of the present invention, coupling section 121a be arranged in parallel with the second sub- radiant body 122, and couples section
The distance between the sub- radiant bodies 122 of 121a and second are fairly close and can form coupling effect.
In double frequency doublet as shown in Figure 1, the length of each radiant body, outward appearance, position for setting etc., it can enter one
Step changes and adjustment.Individually below during the outward appearance of explanation design first antenna portion 11 and the second antenna part 12, it may arrange in pairs or groups several
Kind mode.It during practical application, can be selected in response to factors such as the spaces of substrate, design the outer of first antenna portion and the second antenna part
See.The various outward appearances of the radiant body of attached each accompanying drawing afterwards, also can arbitrarily arrange in pairs or groups, be applied in combination.
Fig. 2 is referred to, it is the schematic diagram of the length configuration in the first antenna portion of double frequency doublet.First antenna portion 11
Used with the first radiant section 111 the second resonance signal of collocation.Therefore, the length L11 of the first radiant section 111 is designed as into second to be total to
The a quarter of wavelength X of shaking 2, L11=1/4* λ 2.First antenna portion 11 is made with the second radiant section 112 the first resonance signal of collocation
With.Therefore, the length L12 of the second radiant section 112 is designed as to the first resonant wavelength λ 1 a quarter, L12=1/4* λ 1.
If continue preceding description it is known that the first resonant frequency be 2.4GHz, the second resonant frequency is when being 5GHz, the
The length L11 of one radiant section is about 15mm, the length L12 of the second radiant section is about 31.25mm.The length L1 in first antenna portion 11
Equal to the summation of the length and the length of the second radiant section 112 of the first radiant section 111, i.e. L1=L11+L12=1/4* (λ 1+ λ
2).Such as：15+31.25=46.25mm.In addition, because the second resonant frequency is more than twice of the first resonant frequency so that the
The wavelength of one resonance signal is more than twice of the wavelength of the first resonance signal.Also therefore, in fig. 2,1/4* λ 2<1/2*1/4*λ
1。
Hereinafter, 111 possible cosmetic variation of the first radiant section is illustrated using Fig. 3 A, 3B；Utilize Fig. 4 A, 4B, 4C, 4D explanation
Second radiant section, 111 possible cosmetic variation.Wherein, the various cosmetic variations of the first radiant section 111 and the second radiant section 111 can
Arrange in pairs or groups, and need not be particularly limited to each other.
The outward appearance of first radiant section 111 can be further divided into two classes, and the first kind is the situation only comprising hypotenuse section (as schemed
Shown in 3A)；Second class is the situation (as shown in Figure 3 B) comprising hypotenuse section Yu straight flange section.
Fig. 3 A are referred to, it is the schematic diagram that the first radiant section only includes hypotenuse section.Because of Fig. 3 A the first radiant section 311
Hypotenuse section 3111 is only included, the length L11a of hypotenuse section 3111 is equal to the length L11 of the first radiant section 311 herein.That is,
L11a=L11=1/4* λ 2.In addition, the angle α 2 between hypotenuse section 3111 and vertical direction need to meet 0 °<α2<90 ° of limit
System.
Fig. 3 B are referred to, it is the first radiant section while the schematic diagram comprising hypotenuse section with straight flange section.If the first spoke
Penetrate section 312 while include hypotenuse section 3121 and straight flange section 3122, then the length L11a of hypotenuse section 3121 and straight flange section
3122 length L11b summation is equal to the length L11 of the first radiant section 311.That is, L11a+L11b=L11=1/4* λ 2.Its
In, the length L11a of hypotenuse section 3121 is likely less than, is equal to, the length L11b more than straight flange section 3122.
Hypotenuse section 3121 and the angle α 4 of vertical direction are more than 0 °, the angle α of hypotenuse section 3121 and straight flange section 312
3 are more than or equal to 90 °.Hypotenuse section 3121 can top end points centered on, counterclockwise offset, so change angle
α 4 size.Likewise, it is end points that straight flange section 3122, which can be utilized with the junction of hypotenuse section 3121, counterclockwise
Or clockwise drift, and then change the size of angle α 3.When angle α 3 is 180 °, quite the feelings of hypotenuse section are only being included
Shape.During practical application, amplitude that hypotenuse section 3121 and straight flange section 3122 can be offset can will not be with the with straight flange section 3122
Two radiant sections are touched as principle.
The outward appearance of second radiant section 112 can be further divided into two classes, and the first kind is only to include the situation of the first extension of section
(as shown in 4A, 4B figure)；Second class is the situation simultaneously comprising the first extension of section and perpendicular segment (such as Fig. 4 C, 4D institute
Show).Either which kind of situation, the length L12 of the second radiant section 112 be 1/4* λ 1 (such as：31.25mm).
Second radiant section only includes the situation of the first extension of section, can further divide according to the outward appearance of the first extension
For two classes, one is that the first extension of section sheet is not as having any knuckle, and the simple outward appearance for a strip is (such as Fig. 4 A institutes
Show)；Secondly being, the first extension of section includes multiple away minor segments, and the intersegmental formation knuckle of each cell, and the first extension in itself
Overall appearance present concavo-convex (as shown in Figure 4 B).In 4A, 4B figure, the length of the second radiant section is equal to the first extension area
The length L12a of section.Therefore, the length L12a of the first extension of section be the first resonant wavelength λ 1 a quarter, L12a=1/4*
λ1。
Fig. 4 A are referred to, it is that the second radiant section only includes the first extension of section, and the first extension of section does not have any folding
The schematic diagram at angle.Second radiant section 411 only includes the first extension of section 4111, and the first extension of section 4111 is horizontal direction.
Therefore, the angle α 5 between the first extension of section 4111 and vertical direction is, for example, right angle.That is, α 5=90 °.
Fig. 4 B are referred to, it assumes that the second radiant section only includes the first extension of section, and the first extension of section includes folding
The schematic diagram at angle.Second radiant section 412 includes the first extension of section, and the first extension of section can be further discriminated between as multiple length
Shorter away minor segment 4121a, 4121b, 4121c, 4121d, 4121e.These away minor segments 4121a, 4121b, 4121c, 4121d,
4121e forms about 90 ° of knuckle to each other.
First extension of section is subject to the practice of tortuous (meander) formation knuckle, dual-band antenna can be reduced in substrate
The area of upper occupancy.During practical application, whether the first extension of section has knuckle, the length of each away minor segment separated by knuckle
Degree, and knuckle quantity etc., and need not be restricted.
To avoid the first radiant section from being got too close to the second radiant section, in addition to the first extension of section, the second radiant section separately may be used
Use perpendicular segment.Wherein, the length of the first extension of section is compared with vertical area segment length.Fig. 4 C, 4D are that the second radiant section includes simultaneously
The situation of first extension of section and perpendicular segment, wherein Fig. 4 C correspond to the situation that the first extension of section does not have knuckle, Fig. 4 D couple
Should have the situation of knuckle in the first extension of section.
Fig. 4 C are referred to, it is the second radiant section while includes the first extension of section and perpendicular segment, and the first extension area
Section does not have the schematic diagram of knuckle.Second radiant section 413 includes the first extension of section 4131 and perpendicular segment 4132.First extension area
Section 4131 length L12a, and the length L12b of perpendicular segment 4132 summation (L12a+L12b) quite in the second radiant section
Length L12.That is, L12a+L12b=L12=1/4* λ 1.
Fig. 4 D are referred to, it assumes that the second radiant section while includes the first extension of section and perpendicular segment, and first prolongs
Stretching section has the schematic diagram of knuckle.Second radiant section 414 includes the first extension of section and perpendicular segment 4142 simultaneously, wherein the
One first extension of section is made up of multiple length shorter away minor segment 4141a, 4141b, 4141c, 4141d, 4141e.Although figure
4D draws five away minor segments, but the actual knuckle quantity included of the first extension of section, length of away minor segment etc., and need not limit
System.
Fig. 5 is referred to, it is the schematic diagram of the length configuration of the second antenna part of double frequency doublet.Second antenna part 12
Include the first sub- 121 and second sub- radiant body 122 of radiant body.The length L22 of second sub- radiant body 122 is shorter than the first sub- radiant body
121 length L21.Due to forming what is coupled between the coupling section 121a and the second sub- radiant body 122 of the first sub- radiant body 121
Reason, the total length of the second antenna part 12 can be caused to be shorter than 1/4* λ 1.That is, L21+L22=L2<1/4*λ1.
First sub- radiant body 121 can further include coupling section 121a and the second extension of section 121b.Therefore, the first son
The length 21 of radiant body 121 is quite coupling the total of section 121a length L21a and the second extension of section 121b length L21b
With, i.e. L21=(L21a+L21b).
Illustrate the possible change of outward appearance of the first sub- 121 and second sub- radiant body 122 of radiant body below.Wherein, on
The cosmetic variation of one sub- radiant body 121, will be in Fig. 6 A, 6B explanations., will be in figure on the cosmetic variation of the second sub- radiant body 122
7A, 7B explanation.
Outward appearance according to the second extension of section is different, and the outward appearance of the first sub- radiant body 121 can be further divided into two classes.One
For the second extension of section is the outward appearance of a strip, does not have any knuckle；Secondly being, the second extension of section has at least one
At knuckle, its overall appearance presents concavo-convex.Fig. 6 A, 6B points of the second extensions of section for the first sub- radiant body do not have knuckle, tool
There is the situation of knuckle.
Fig. 6 A are referred to, it is the schematic diagram that the second extension of section does not have knuckle.First sub- radiant body 621 includes coupled zone
The extension of section 6212 of section 6211 and second.Section 6211 is wherein coupled parallel to vertical direction.Coupling section 6211 length be
L21a, the length of the second extension of section 6212 is L21b.Because the length L21 of the first sub- radiant body 121 must meet：1/4*λ2<
L21<1/4* λ 1, the length summation of the coupling extension of section 6212 of section 6211 and second have to comply with 1/4* λ 2<L21a+L21b=
L21<1/4* λ 1 limitation.In addition, the angle β 1 between the coupling extension of section 6212 of section 6211 and second is between 90 ° and 180 °
Between.That is, (90≤β 1≤180).
Fig. 6 B are referred to, it is the schematic diagram that the second extension of section has knuckle.First sub- radiant body 621 includes coupled zone
The extension of section of section 6221 and second.In this schema, the second extension of section include the shorter away minor segment 6221a of multiple length,
6221b、6221c、6221d、6221e.Whether the second extension of section includes knuckle, the length of each away minor segment, and its knuckle
Quantity need not be simultaneously restricted.
As described in Fig. 3 B, 4B, 6B, when the first extension of section and/or the second extension of section have knuckle, its knuckle number
Measure simultaneously need not limit, and the length of each away minor segment and need not limit need it is isometric.In the first extension of section and/or second
In the away minor segment of one or more that extension of section is included, if with (such as Fig. 3 B, 4B the first radiation of other radiant bodies
Section, and Fig. 6 coupling section) person of being connected is numbered, then and it is parallel to each other wherein to belong to the away minor segment of odd-numbered, and belongs to
In odd-numbered away minor segment perpendicular to the away minor segment for belonging to even-numbered.
The outward appearance of second sub- radiant body can be further divided into two classes, and the first kind is the situation only comprising long side section (as schemed
Shown in 7A, I types shape)；Second class is the situation (as shown in Figure 7 B, inverted L shape shape) comprising long side section Yu short side section.
Fig. 7 A are referred to, it is the schematic diagram that the second sub- radiant body only includes long side section.When the second sub- radiant body 721 only
During comprising long side section 721a, the second load point (not painting formula) will be arranged on long side section 721a top.In fig. 7, second
Beeline between sub- radiant body 721 and first antenna portion (not painting formula) quite long side section 721a right edge to first
Distance between antenna part L1.
Fig. 7 B are referred to, it is the second sub- radiant body while the schematic diagram comprising long side section with short side section.Such as Fig. 7 institutes
Show, the second sub- radiant body is simultaneously comprising long side section 722a and short side section 722b.Wherein long side section 722a length L22a
Shorter edge section 722b length L22b, and angle β 2 between the two is right angle (β 2=90 °).When the second sub- radiant body 722
For L-type shape when, the second load point (not painting formula) is arranged to the short side section 722b rightmost side.Now, the second sub- radiant body
Beeline between 722 and first antenna portion (not painting formula), quite at short side section 722b rightmost side edge to first day
Distance between line portion L1.
Fig. 8 is referred to, it is the schematic diagram of the embodiment for the double frequency doublet conceived according to the present invention.Double frequency coupling pole day
Line 2 is arranged at substrate 20, according to the control of RF receiving and transmission module (transceiver) 29, coaxial cable 27 and double frequency coupling pole day
Line 20 is via the resonance signal of load point feed-in first and the second resonance signal.First load point 25a is used for feed-in ground signalling, and
Second load point 25b is used for feed-in electromagnetic signal.
When resonance signal is transmitted by the first load point 25a and the second load point 25b, electric current produces waveguide through transmission line
(waveguide) form electromagenetic wave radiation to go out, reach the transmission of electromagnetic signal；When resonance signal passes through the first load point
When 25a and the second load point 25b is received, the radiation of electromagnetic energy receives the electric energy to form radio frequency via antenna, so as to reach
Into the transmission of electromagnetic signal.
The coupling section 221a of second sub- 222 and first sub- radiant body 221 of radiant body is collectively forming coupled structure, and second
The length L22 of sub- radiant body 222 and the coupling section 221a of the first sub- radiant body 221 length are fairly close.When the second sub- spoke
When beam 222 is I type shapes, the length of the second sub- radiant body 222 is less than or equal to the length of the coupling section of the first sub- radiant body
Degree.When the second sub- radiant body 222 is inverted L shape shape, the length of long side section is less than or equal to the coupling of the first sub- radiant body 221
Close section 221a length.Now, the length of short side section can influence the second sub- 222 and first sub- radiant body 221 of radiant body
Couple the comparative result between section 221a length.
Fig. 9 A are referred to, it is the schematic diagram in the first antenna portion in double frequency doublet.Pass through hypotenuse section 211a's
Use, double frequency doublet there can be larger bandwidth range in the resonance signal of feed-in high band.After simplation validation,
For the application that the second resonant frequency is 5GHz, the bandwidth of the resonance signal of high band increases to 1870MHz by 1150MHz.That is,
The double frequency doublet of the application can improve the amplitude of bandwidth of the resonance signal of high band up to 62.6%.Because load point is arranged at tiltedly
Border area section 211a reason, in order to avoid producing short circuit when welding load point, hypotenuse section 211a width w2 is compared with straight flange area
The section 211b wide (w2 of width w1>w1).
Fig. 9 B are referred to, the second antenna part in its double frequency doublet.The double frequency doublet of the present invention was at second day
Line portion uses coupled structure, and such a way can improve the bandwidth of the resonance signal of feed-in low-frequency range.Analog result shows, for
First resonant frequency is 2.4GHz application, and the bandwidth of the first resonance signal can be increased to 120MHz by 100MHz, and amplification reaches
20%.
In this figure, the second sub- radiant body 222 is less than 0.8mm (0 with coupling section 221b spacing d2<d2<0.8).
The short side section 222b of second sub- radiant body 222 length between 0~3.2mm, long side section 222a length between 7.25mm with
8.25mm.Accordingly, the ratio between the length of the long side section 222a in this embodiment and short side section 222b length range
Between 2.578125 and infinitely great (∞).
Convenience during based on wiring considers, in 9A, 9B figure, in addition to hypotenuse section 211a width w2, and straight flange
Section 212b width w1, the width w3 of the first extension of section；Short side section 222b width w6；And long side section 222a
Width w5, the second extension of section 221b width w7 may be equal to each other.
Or long side section 222a width w5 is only second to hypotenuse section 211a width w2, but shorter edge section 222b
Width w6, width w1, the width w3 of the first extension of section of straight flange section 212b in first antenna portion, and compared with the first son
The coupling section 221a of radiant body 221 width w4, the second extension of section 221b width w7 is wider.
Fig. 9 C are referred to, it is the signal of the relative position for the double frequency doublet for further illustrating the embodiment of the present invention
Figure.Beelines of the spacing d3 between long side section and hypotenuse section.Spacing d4 is closer second antenna in perpendicular segment
Most segment distance between the side in portion 13, and the side of short side section.Spacing d5 is between hypotenuse section and the first extension of section
Beeline.Based on the consideration for setting load point, in Fig. 9 C, spacing d3 and spacing d4 is at least 1mm.In addition, spacing d5 must
0mm must be more than.During practical application, no matter the second sub- radiant body 222 has inverted L shape shape or I type shapes, the second sub- radiant body
222 and the first minimum range between radiant section 211, depend primarily on the welding space needed for load point.That is, for avoiding feed-in
It is short-circuit between point 25a and load point 25b.
As used frequency range is different, the current path in double frequency doublet is also with change.Figure 10 A, 10B distinguish
For double frequency doublet apply low-frequency range, high band resonance signal when current path.
Figure 10 A are referred to, it is the schematic diagram that double frequency doublet is used for the resonance signal of feed-in first.The one the first electric currents
CP11 flows through second radiant section in first antenna portion 21, and the one the second electric current CP12 flow through the first son radiation of the second antenna part 22
221 and second sub- radiant body 222 of body.As RF receiving and transmission module 29 is set as transmitting purposes or receives the difference of purposes, first
First electric current CP11 and the one the second electric current CP12 flow direction will be with changes.No matter the flow direction of electric current why, current strength meeting
Distance between load point is inversely proportional.Therefore the one the first electric current CP11 are strong in the electric current at the first load point 25a
Degree is stronger；And the one the second electric current CP12 it is stronger in the current strength at the second load point 25b.
Figure 10 B are referred to, it is the schematic diagram that double frequency doublet is used for the resonance signal of feed-in second.The two the first electric currents
CP21 flows through first radiant section in first antenna portion 21.At the same time, the two the second electric current CP22 flow through the first sub- radiant body 221
A part, the second sub- radiant body 222.As RF receiving and transmission module 29 is set as transmitting purposes or receives the difference of purposes, the
2 first electric current CP21 and the two the second electric current CP22 flow direction will be with changes.No matter the flow direction of electric current why, current strength
Distance between meeting and load point is inversely proportional.Therefore the two the first electric current CP21 are in the electric current at the first load point 25a
Intensity is stronger, and the two the second electric current CP22 are stronger in the current strength at the second load point 25b.
Further compare Figure 10 A, 10B can be seen that current path (first corresponding to the first relatively low resonance signal of frequency
First electric current CP11, the one the second electric current CP12 flow path), electric current road corresponding to the second resonance signal higher compared with frequency
Footpath (the two the first electric current CP21, the two the second electric current CP22 flow path) is long.
According to the conception of the present invention, the second resonant frequency is about twice or more of the first resonant frequency.For example, originally
It is 800/900MHz that the double frequency doublet of invention, which can be applied to the first resonant frequency, and the second resonant frequency is 1800MHz's
Situation.Or it is 2400~2500MHz that double frequency doublet of the invention, which can be applied to the first resonant frequency, and the second resonance
Frequency is 5150~5850MHz situation.
For the compact characteristic in response to portable electron device, double frequency doublet can be built into portable electronic
One jiao of the system circuit board of device.Or for setting the substrate of antenna can be the relatively small printing-type of another size
Circuit board, and be independently positioned at wall in the housing of electronic installation, and the RF connectors of arrange in pairs or groups coaxial cable or button make
With.The double frequency doublet of the present invention can easily adjust according to the demand of product reaches the required operation frequency of system with amendment
Section, and it is applicable to many radio communication devices.
In summary, although the present invention is disclosed as above with preferred embodiment, so it is not limited to the present invention.This hair
Bright one of ordinary skill in the art, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Therefore,
Protection scope of the present invention is worked as to be defined depending on appended claims confining spectrum.
Claims (13)
1. a kind of dual-band antenna, the frequency for the resonance signal of feed-in first and the second resonance signal, wherein second resonance signal
Rate is higher than the frequency of first resonance signal, and the dual-band antenna includes：
First antenna portion, comprising：
First radiant section, the wherein length of first radiant section correspond to the wavelength of second resonance signal；And
Second radiant section, it is connected with first radiant section, and the first angle, wherein second spoke is formed with first radiant section
The length for penetrating section corresponds to the wavelength of first resonance signal；And
Second antenna part, comprising：
First sub- radiant body, comprising：
Couple section；And
Extension of section, with the second angle of the intersegmental formation in the coupled zone；And
Second sub- radiant body, it is arranged between the first antenna portion and the first sub- radiant body, and the second sub- radiant body is at least
A part is parallel to the coupling section.
2. dual-band antenna as claimed in claim 1, the wherein first sub- radiant body are grown compared with the second sub- radiant body, and this second
Distance between sub- radiant body and the first sub- radiant body is less than the distance between the second sub- radiant body and the first antenna portion.
3. the length of dual-band antenna as claimed in claim 1, the wherein length of the first sub- radiant body and the second sub- radiant body
The summation of degree is shorter than the length of second radiant section.
4. dual-band antenna as claimed in claim 1, the wherein frequency of second resonance signal are more than or equal to first resonance
Twice of the frequency of signal, wherein
The length of first radiant section is a quarter of the wavelength of first resonance signal；And
The length of second radiant section is a quarter of the wavelength of second resonance signal.
5. dual-band antenna as claimed in claim 1, wherein second radiant section are parallel to first direction, and the coupling section is put down
Row is vertical with the second direction in second direction, the wherein first direction.
6. dual-band antenna as claimed in claim 5, wherein first angle is acute angle, and second angle is right angle or is blunt
Angle.
7. dual-band antenna as claimed in claim 5, wherein first radiant section include：
Hypotenuse section, with intersegmental formation first angle of the second radiation；And
The 3rd angle is formed between straight flange section, with the hypotenuse section.
8. dual-band antenna as claimed in claim 7, the wherein width of the hypotenuse section are more than the width of the straight flange section, and should
3rd angle is obtuse angle.
9. dual-band antenna as claimed in claim 1, wherein,
When the second sub- radiant body is I type shapes, the second sub- radiant body be shorter in length than or the length equal to the coupling section
Degree；Or
When the second sub- radiant body is inverted L shape shape, the second sub- radiant body includes short side section and long side section, and the length
Border area section is shorter than or the length equal to the coupling section.
10. dual-band antenna as claimed in claim 9, wherein the long side section are parallel to the coupling section, and the short side section
Beeline between the first antenna portion is shorter than or equal to the long side section and the beeline in the first antenna portion.
11. dual-band antenna as claimed in claim 1, wherein,
When the dual-band antenna is used for feed-in first resonance signal, the one the first electric currents flow through second radiant section, and first
Second electric current flows through the second sub- radiant body and the first sub- radiant body；And
When the dual-band antenna is used for feed-in second resonance signal, the two the first electric currents flow through first radiant section, and second
Second electric current flows through the second sub- radiant body and the partial first sub- radiant body.
12. dual-band antenna as claimed in claim 11, wherein also including：
First load point, is arranged at first radiant section and second radiation is intersegmental, wherein the one the first electric currents with this second
First electric current flows through first load point；And
Second load point, one end of the second sub- radiant body is arranged at, wherein the one the second electric currents and the two the second electric currents
Flow through second load point.
13. dual-band antenna as claimed in claim 1, the wherein extension of section include an at least away minor segment, wherein at this at least
In one away minor segment, first community section adjacent to each other and the intersegmental formation knuckle of second community.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454771.7A CN107706507A (en) | 2016-06-21 | 2016-06-21 | Dual-band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454771.7A CN107706507A (en) | 2016-06-21 | 2016-06-21 | Dual-band antenna |
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| Publication Number | Publication Date |
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| CN107706507A true CN107706507A (en) | 2018-02-16 |
Family
ID=61168215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610454771.7A Pending CN107706507A (en) | 2016-06-21 | 2016-06-21 | Dual-band antenna |
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|---|---|---|---|---|
| US20050035919A1 (en) * | 2003-08-15 | 2005-02-17 | Fan Yang | Multi-band printed dipole antenna |
| US20060284780A1 (en) * | 2005-06-17 | 2006-12-21 | An-Chia Chen | Dual-band dipole antenna |
| US20120105292A1 (en) * | 2010-10-27 | 2012-05-03 | Acer Incorporated | Communication Device and Antenna Thereof |
| US20130113661A1 (en) * | 2011-11-07 | 2013-05-09 | Mediatek Inc. | Wideband antenna |
| US20150162666A1 (en) * | 2002-09-10 | 2015-06-11 | Fractus, S.A. | Coupled Multiband Antennas |
| CN205122754U (en) * | 2015-10-28 | 2016-03-30 | 普联技术有限公司 | Four miniaturized unit dual -frenquency MIMO antennas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150162666A1 (en) * | 2002-09-10 | 2015-06-11 | Fractus, S.A. | Coupled Multiband Antennas |
| US20050035919A1 (en) * | 2003-08-15 | 2005-02-17 | Fan Yang | Multi-band printed dipole antenna |
| US20060284780A1 (en) * | 2005-06-17 | 2006-12-21 | An-Chia Chen | Dual-band dipole antenna |
| US20120105292A1 (en) * | 2010-10-27 | 2012-05-03 | Acer Incorporated | Communication Device and Antenna Thereof |
| US20130113661A1 (en) * | 2011-11-07 | 2013-05-09 | Mediatek Inc. | Wideband antenna |
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Application publication date: 20180216 |