CN106207422B - Antenna assembly - Google Patents
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- CN106207422B CN106207422B CN201510379968.4A CN201510379968A CN106207422B CN 106207422 B CN106207422 B CN 106207422B CN 201510379968 A CN201510379968 A CN 201510379968A CN 106207422 B CN106207422 B CN 106207422B
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Abstract
The present invention discloses a kind of antenna assembly, it include a double frequency cross dipole antenna, it include four radiators, each radiator is extended by a central axial plane, it and include one first irradiation unit and one second irradiation unit to receive and dispatch the wireless signal of a first band and a second band respectively, and plane where plane where each radiator and adjacent radiation body is substantially in 90 degree；And a reflecting plate, it is set to the side of the double frequency cross dipole antenna；Wherein, the position of the reflecting plate and shape are relevant to signal wavelength corresponding to the first band and second band, and make the double frequency cross dipole antenna in the first band be substantially in directive property and in the second band be substantially in omni-directional.
Description
Technical field
The present invention relates to a kind of antenna assemblies, are operable in double frequency more particularly, to one kind, and can be in high frequency band substantially
It is substantially in the antenna assembly of omni-directional in directive property and in low-frequency band.
Background technique
With the evolution of mechanics of communication, many wireless telecommunication systems have supported dual frequency operation.It is existing in order to reach dual frequency operation
There is technology to make be applicable in high and low frequency antenna respectively, then antenna assembly is combined into duplexer.However, when there is micromation to need
When asking, its yield value will be greatly reduced in this kind of antenna assembly after being miniaturized, and derive integrity problem.
In addition, antenna assembly need to adjust aerial angle or be directed toward position in certain applications in due course, during the adjustment may
Cause signal dead angle.For example, household networking gear (Indoor Customer Premises Equipments) is for providing
Indoor wireless Communications service, due to indoor often because compartment, furniture etc. influence the transmitting of radio wave, the prior art has developed
Out can adjust automatically aerial angle or be directed toward position antenna assembly, thus household networking gear can be according to the distribution of indoor user
Situation, appropriate adjustment wireless signal receive and dispatch situation.However, when the launch angle or direction of household networking gear adjustment antenna assembly
When position, transient signals dead angle may be caused in the process, if the adjustment speed for just having user to fall within signal dead angle or antenna assembly
When spending slower, it will affect use situation, bring inconvenience.
Therefore, how to improve yield value of the dual-band antenna after being miniaturized, and how to avoid angle adjustable or position
The signal dead angle of antenna assembly during the adjustment, it has also become one of this field important topic.
Summary of the invention
Therefore, the main purpose of the present invention is to provide a kind of antenna assembly, the shortcomings that improve the prior art.
In order to achieve the above object, the embodiment of the present invention discloses a kind of antenna assembly, and it include a double frequency cross dipole antenna, packet
Containing four radiators, each radiator is extended by a central axial plane, and includes one first irradiation unit and one second radiation
Portion to receive and dispatch the wireless signal of a first band and a second band, and plane and adjacent radiation body where each radiator respectively
Place plane is substantially in 90 degree；And a reflecting plate, it is set to the side of the double frequency cross dipole antenna；Wherein, by the reflection
Plate is substantially in a square along one first projection result that the central axis is projected on a plane of reference, by the double frequency cross dipole antenna
One second projection result for being projected on the plane of reference along the central axis corresponds roughly to two diagonal lines of the square, the plane of reference
Perpendicular to the central axis；Wherein, a centre frequency of the first band is higher than a centre frequency of the second band, first throwing
A pair of of diagonal length of the square of shadow result be greater than corresponding to the first band 0.6 times of signal wavelength and be less than this
0.35 times of signal wavelength corresponding to two frequency bands, and the most low coverage of any first irradiation unit of the reflecting plate and four radiator
Between 0.15 times and 0.25 times of the signal wavelength corresponding to the first band, make the double frequency cross dipole antenna in this
First band be substantially in directive property and in the second band be substantially in omni-directional.
Detailed description of the invention
Fig. 1 is the schematic diagram of one antenna assembly of the embodiment of the present invention；
Fig. 2A to Fig. 2 C is the part schematic diagram of the antenna assembly of Fig. 1；
Fig. 3 A, Fig. 3 B are respectively that the antenna assembly of Fig. 1 operates in the S parameter schematic diagram of different frequency bands；
Fig. 3 C, Fig. 3 D, Fig. 3 E, Fig. 3 F are respectively that the antenna assembly of Fig. 1 operates in the field pattern analog result of different frequency bands
Schematic diagram；
Fig. 4 is the current distribution schematic diagram of the antenna assembly of Fig. 1；
Fig. 5 A is the schematic diagram of one antenna assembly of the embodiment of the present invention；
Fig. 5 B is the current distribution schematic diagram of the antenna assembly of Fig. 5 A；
Fig. 6 A, Fig. 6 B are respectively that the antenna assembly of Fig. 5 A operates in the S parameter schematic diagram of different frequency bands；
Fig. 6 C, Fig. 6 D, Fig. 6 E, Fig. 6 F are respectively that the antenna assembly of Fig. 5 A operates in the field pattern analog result of different frequency bands
Schematic diagram；
Fig. 7 A is the schematic diagram of one antenna assembly of the embodiment of the present invention；
Fig. 7 B to Fig. 7 E is the part schematic diagram of the antenna assembly of Fig. 7 A；
Fig. 8 A, Fig. 8 B are respectively that the antenna assembly of Fig. 7 A operates in the S parameter schematic diagram of different frequency bands；
Fig. 8 C, Fig. 8 D, Fig. 8 E, Fig. 8 F are respectively that the antenna assembly of Fig. 7 A operates in the field pattern analog result of different frequency bands
Schematic diagram；
Fig. 9 A~Fig. 9 H, Figure 10 A, Figure 10 B are respectively the schematic diagram of the antenna assembly of different embodiments of the invention.
Symbol description
Specific embodiment
Fig. 1 and Fig. 2A to Fig. 2 C is please referred to, Fig. 1 is the schematic diagram of one antenna assembly 10 of the embodiment of the present invention, and Fig. 2A is extremely
Fig. 2 C is the part schematic diagram of antenna assembly 10.Antenna assembly 10 includes a double frequency cross dipole antenna 100 and a reflecting plate
102, be operable in double frequency (such as the first, second frequency band, and the centre frequency of first band be higher than second band center frequency
Rate), and can be in high frequency band (such as first band) substantially in directive property and in low-frequency band (such as second band) substantially in omnidirectional
Property.The framework of double frequency cross dipole antenna 100 is as its name suggests to be arranged by two dipole antennas with interleaved mode.Specifically,
Double frequency cross dipole antenna 100 includes radiator RT1~RT4, and each radiator is extended from a central axis CL to a plane,
And plane where adjacent radiation body is substantially in 90 degree, i.e. radiator RT1 is vertical with radiator RT2, RT4, radiator RT2 and radiation
Body RT1, RT3 are vertical, and so on；Therefore, one first dipole antenna of radiator RT1, RT3 formation, and radiator RT2, RT4
Form one second dipole antenna, and two dipole antennas are in (+45 °) and (- 45 °) polarization respectively, thus be it is mutually orthogonal, can be promoted every
From degree.Further, radiator RT1~RT4 separately include two irradiation unit RT1_1, RT1_2, RT2_1, RT2_2, RT3_1,
RT3_2, RT4_1, RT4_2, and by difference in length, irradiation unit RT1_1, RT2_1, RT3_1, RT4_1 can receive and dispatch high frequency band
Wireless signal, be shaped like in trapezoidal or knot shape, and irradiation unit RT1_2, RT2_2, RT3_2, RT4_2 are then to receive and dispatch
The wireless signal of low-frequency band, it is substantially in a strip shape and include two (90 degree) bending.In addition, in this instance, radiator RT1, RT3
It is set to the face A (clear to ask, another side is denoted as the face B) of a substrate 104, and radiator RT2, RT4 are set to a substrate 106
The face C (to ask clear, another side is denoted as the face D), but not limited to this, it is all can be from central axis CL to orthogonal four direction
Extend Double-frequency dipole antenna and is applied both to the present invention；In other words, as long as the opposite of radiator RT1~RT4 can suitably be fixed
Position, radiator RT1~RT4 can achieve in any way, and be not limitedly formed on substrate 104,106.Meanwhile substrate 104,
Grooved hole 1040,1060 is formed on 106, this is needed for assembling, adaptability is adjusted, and without being limited thereto.In addition, radiator RT1
~RT4 is slightly different in the shape of load point, as shown in the region FB of region FA and Fig. 2 B of Fig. 2A, is similarly assembling and is examined
Consider, and it is without being limited thereto, and the shape of radiator RT1~RT4 can also be identical or different, all belongs to the scope of the present invention.For example, only
Want the current path of irradiation unit RT1_1, RT2_1, RT3_1, RT4_1 that can meet the quarter-wave to receiving and transmitting signal,
Its shape is not limited to trapezoidal or knot shape；Similarly, the current path of irradiation unit RT1_2, RT2_2, RT3_2, RT4_2 should meet to
The quarter-wave of receiving and transmitting signal, shape are not limited to the strip of two bendings.
On the other hand, reflecting plate 102 is made of metal material, is set to the side of double frequency cross dipole antenna 100, and
In this instance, reflecting plate 102 is square, and substrate 104,106 is vertical with reflecting plate 102 and pair substantially with reflecting plate 102
Linea angulata overlapping.In other words, if reflecting plate 102 is considered as a plane of reference, double frequency cross dipole antenna 100 is thrown along central axis CL
Shadow in the projection result on reflecting plate 102 substantially fall within or corresponding to reflecting plate 102 diagonal line.
In order to make double frequency cross dipole antenna 100 in high frequency band be substantially in directive property and in low-frequency band be substantially in omnidirectional
Property, the embodiment of the present invention passes through the size of control reflecting plate 102 and the position relative to double frequency cross dipole antenna 100.It is brighter
For really, the catercorner length L of reflecting plate 102 need to be greater than 0.6 times of signal wavelength corresponding to high frequency band and be less than low frequency
0.35 times of signal wavelength corresponding to frequency band, and the high-frequency radiation part RT1_1 of reflecting plate 102 and radiator RT1~RT4,
The minimum distance H of RT2_1, RT3_1, RT4_1 need between 0.15 times of the signal wavelength corresponding to high frequency band with 0.25 times it
Between.In this way, double frequency cross dipole antenna 100 can in high frequency band be substantially in directive property and in low-frequency band be substantially in omnidirectional
Property, associated analog result can be proved further.
For example, it for advising long term evolution (Long Term Evolution, LTE) communication system with beauty, has standardized
Multiple operational frequency bands, wherein Band4 frequency band is 1710MHz~1755MHz and 2110MHz~2155MHz, and Band13 frequency band is
777MHz~787MHz and 746MHz~756MHz.In this case, can appropriate adjustment irradiation unit RT1_1, RT2_1, RT3_1,
The length of RT4_1 adjusts the length of irradiation unit RT1_2, RT2_2, RT3_2, RT4_2 to receive and dispatch the signal of Band4 to receive and dispatch
The signal of Band13, while the catercorner length L of reflecting plate 102 is designed as 0.6 times of wavelength corresponding to 1710MHz (about
75mm) between 0.35 times (about 94mm) of wavelength corresponding to 787MHz, and by reflecting plate 102 and irradiation unit RT1_1, RT2_
1, the minimum range of RT3_1, RT4_1 are designed as 0.15 times (about 18.75mm) of wavelength corresponding to 1710MHz to 0.25 times
Then it is in directive property when double frequency cross dipole antenna 100 can be made to operate in Band4 between (about 31.25mm), and is in when Band13
Omni-directional, associated analog result can refer to Fig. 3 A to Fig. 3 F.Fig. 3 A, Fig. 3 B be respectively antenna assembly 10 operate in Band13 and
The S parameter schematic diagram of Band4, wherein solid line indicates the reflection damage of (forming it by radiator RT1, RT3) first dipole antenna
(i.e. S11) analog result is lost, dotted line indicates the reflection loss of (forming it by radiator RT2, RT4) second dipole antenna (i.e.
S22) analog result, and dotted line then indicate the first dipole antenna with respect to the second dipole antenna transmission coefficient (i.e. S21, indicate every
From degree) analog result.By Fig. 3 A and Fig. 3 B it is found that antenna assembly 10 can correct operation in Band13 and Band4, and the first dipole
Isolation between antenna and the second dipole antenna can be operated correctly up to 30dB or more.
Further, Fig. 3 C, Fig. 3 D are respectively the field pattern simulation knot that the first dipole antenna operates in Band13 and Band4
Fruit, and Fig. 3 E, Fig. 3 F are respectively the field pattern analog result that the second dipole antenna operates in Band13 and Band4.In fig. 3 c, real
Line indicates that the first dipole antenna operates in the field pattern of 750MHz in Band13, and triangle line indicates that the first dipole antenna operates in
The field pattern of 780MHz in Band13；In fig. 3d, solid line indicates that the first dipole antenna operates in the homopolarity of 1740MHz in Band4
Change (Co-polarization) field pattern, triangle line indicates that the first dipole antenna operates in the same polarization field of 2140MHz in Band4
Type, dotted line indicate that the first dipole antenna operates in heteropolar (Cross-polarization) field pattern of 1740MHz in Band4,
Square line indicates that the first dipole antenna operates in the heteropolar field pattern of 2140MHz in Band4.Similarly, in fig. 3e, solid line indicates
Second dipole antenna operates in the field pattern of 750MHz in Band13, and triangle line indicates that the second dipole antenna operates in Band13
The field pattern of 780MHz；In Fig. 3 F, dotted line indicates that the second dipole antenna operates in the same polarization field pattern of 1740MHz in Band4, side
Block line indicates that the second dipole antenna operates in the same polarization field pattern of 2140MHz in Band4, and solid line indicates the operation of the second dipole antenna
The heteropolar field pattern of 1740MHz in Band4, triangle line indicate that the second dipole antenna operates in the heteropolar of 2140MHz in Band4
Change field pattern.
By Fig. 3 C to Fig. 3 F it is found that the first, second dipole antenna is substantially in omni-directional when operating in Band13, and in
It is obviously in directive property when Band4.It follows that passing through the size and location of appropriate adjustment reflecting plate 102, antenna assembly 10 is not only
Can in high and low frequency frequency band normal operating, and can in high frequency band (such as Band4) substantially in directive property and in low-frequency band (such as
It Band13) is substantially in omni-directional.In this way, which the embodiment of the present invention is not required to duplexer, the day for operating in high and low frequency can be realized
Line apparatus；Importantly, for the application that need to be adjusted aerial angle in due course or be directed toward position, such as household networking gear, if adopting
With the antenna assembly 10 of the embodiment of the present invention, when adjusting aerial angle or being directed toward position, since antenna assembly 10 can be in low frequency
Frequency band maintains omni-directional, therefore can reduce or avoid the generation at signal dead angle, can be used for maintaining wireless transmission function, avoids influencing to make
Use situation.
It is noted that antenna assembly 10 is the embodiment of the present invention, those skilled in the art, which works as, to be done accordingly not
Same modification, and it is without being limited thereto.For example, as previously mentioned, in double frequency cross dipole antenna 100 radiator RT1~RT4 shape
Shape, assembling mode etc. all can appropriate adjustment, and be not limited to shown in Fig. 1 and Fig. 2A to Fig. 2 C.For example, by Fig. 3 C, Fig. 3 E it is found that double
Gain offsets of the frequency cross dipole antenna 100 at low frequency are about 5.2dB, the main reason is that the first dipole antenna and second is occasionally
Pole antenna tilts 45 ° respectively, therefore field pattern energy at left and right edges can be reduced slightly.In addition, by Fig. 3 D, Fig. 3 F it is found that
One dipole antenna and the second dipole antenna are in the range (i.e. the uplink frequency range of Band 4) of 1710MHz to 1755MHz, antenna
Gain about 6.9dBi, but in the range of 2110MHz to 2155MHz (i.e. the lower link frequency range of Band 4), antenna highest-gain
(Peak Gain) is relatively low, immediately ahead of gain only about 2.5dBi, main reason is that portion of electrical current flows to low frequency radiation
Portion (i.e. RT1_2, RT2_2, RT3_2, RT4_2), thus gain is caused to decline.Referring to FIG. 4, Fig. 4 is the antenna assembly 10 of Fig. 1
Operate in current distribution schematic diagram when 2140MHz.For the sake of clarity, the component symbol of antenna assembly 10 is omitted in Fig. 4, can join
Examine Fig. 1 and Fig. 2A to Fig. 2 C.As shown in the region 40,42 of Fig. 4, when operating in high frequency band, the low frequency spoke of antenna assembly 10
The electric current penetrated on portion (comparison chart 1 and Fig. 2A to Fig. 2 C, i.e. irradiation unit RT1_2, RT3_2) in transverse direction is very big, leads to high frequency field
Type disperses toward two sides, and gain is caused to decline.
In order to improve the high-frequency gain of antenna assembly 10, Fig. 5 A is please referred to, Fig. 5 A is one antenna assembly of the embodiment of the present invention
50 schematic diagram.Antenna assembly 50 is derived by antenna assembly 10, therefore similar elements continue to use the same symbol expression.Antenna assembly 50 with
10 main difference of antenna assembly, which is in, is replaced into radiator for radiator RT1~RT4 of antenna assembly 10 in antenna assembly 50
RT1 '~RT4 ', and become a pair of frequency cross dipole antenna 500.In addition to this, antenna assembly 50 is equally operable in double frequency (such as
First, second frequency band), and can be in high frequency band (such as first band) substantially in directive property and in low-frequency band (such as second band)
It is substantially in omni-directional.Radiator RT1 '~RT4 ' can effectively reduce the transverse current in low frequency radiation portion when operating in high frequency, please after
Continuous to refer to Fig. 5 B, Fig. 5 B is current distribution schematic diagram when antenna assembly 50 operates in 2140MHz.By Fig. 5 B it is found that radiator
There are few transverse currents in RT1 '~RT4 ' low frequency radiation portion, therefore can improve high-frequency gain.Specifically, radiator RT1 '~RT4 '
Length still conform to the requirement of radiator RT1~RT4, main difference is bending mode (such as region 52,54 in low frequency radiation portion
It is shown) and partial segments (such as 502,504,506,508) have change width, and make transverse area (such as 52,54) there are few lateral electricity
Stream, thus high-frequency gain can be reinforced.
Please continue to refer to Fig. 6 A to Fig. 6 E, Fig. 6 A, Fig. 6 B are respectively the S that antenna assembly 50 operates in Band13 and Band4
Parameter schematic diagram, wherein solid line indicates the reflection loss of (forming it by radiator RT1 ', RT3 ') first dipole antenna (i.e.
S11) analog result, dotted line indicate the reflection loss (i.e. S22) of (forming it by radiator RT2 ', RT4 ') second dipole antenna
Analog result, and dotted line then indicates transmission coefficient (i.e. S21 indicate isolation) of first dipole antenna with respect to the second dipole antenna
Analog result (S21 of Fig. 6 A, which exceeds, can indicate range and not show).Fig. 6 C, Fig. 6 D are respectively that the first dipole antenna operates in
The field pattern analog result of Band13 and Band4；Wherein, in figure 6 c, solid line indicates that the first dipole antenna operates in Band13
The field pattern of 750MHz, and triangle line indicates that the first dipole antenna operates in the field pattern of 780MHz in Band13；In figure 6d, solid line
Indicate that the first dipole antenna operates in same polarization (Co-polarization) field pattern of 1740MHz in Band4, triangle line indicates
First dipole antenna operates in the same polarization field pattern of 2140MHz in Band4, and dotted line indicates that the first dipole antenna operates in Band4
Heteropolar (Cross-polarization) field pattern of middle 1740MHz, square line indicate that the first dipole antenna operates in Band4
The heteropolar field pattern of 2140MHz.Fig. 6 E, Fig. 6 F are respectively the field pattern simulation that the second dipole antenna operates in Band13 and Band4
As a result, wherein in Fig. 6 E, solid line indicates that the second dipole antenna operates in the field pattern of 750MHz in Band13, and triangle line table
Show that the second dipole antenna operates in the field pattern of 780MHz in Band13；In Fig. 6 F, dotted line indicates that the second dipole antenna operates in
The same polarization field pattern of 1740MHz in Band4, square line indicate that the second dipole antenna operates in the same polarization of 2140MHz in Band4
Field pattern, solid line indicate that the second dipole antenna operates in the heteropolar field pattern of 1740MHz in Band4, and triangle line indicates the second dipole
The heteropolar field pattern of antenna operation 2140MHz in Band4.
By Fig. 6 A and Fig. 6 B it is found that antenna assembly 50 can correct operation in Band13 and Band4, the impedance at low frequency
With about -7dB, and the isolation between the first dipole antenna and the second dipole antenna is more more than at low frequency up to 30dB or more
40dB, therefore can correctly operate.By Fig. 6 C to Fig. 6 F it is found that the first, second dipole antenna is substantially in omnidirectional when operating in Band13
Property, and be obviously in directive property when Band4；Meanwhile gain offsets of the double frequency cross dipole antenna 500 at low frequency are about
5.5dB, and (i.e. the uplink of Band 4 is frequently in the range of 1710MHz to 1755MHz for the first dipole antenna and the second dipole antenna
Section) in, antenna gain about 7dBi, and in the range of 2110MHz to 2155MHz (i.e. the lower link frequency range of Band 4), antenna
Highest-gain (Peak Gain) is up to 5.7dBi.It follows that antenna assembly 50 can improve the high frequency day of antenna assembly 10 really
Line gain.
It can be seen from the above, antenna assembly 50 removes can be such as the operation of antenna assembly 10, more by the shape for changing radiator
High frequency antenna gain can be promoted, to promote antenna efficiency.Further, other than changing and radiating shape, it can separately be increased
Its auxiliary element, to meet needed for not homologous ray.For example, lower link frequency range of the antenna gain of antenna assembly 50 in Band 4 mentions
About 3dB is risen, but the antenna gain of its upper and lower link frequency range is still variant.In this case, it can increase in antenna assembly 50 and refer to
To device.
Fig. 7 A to Fig. 7 E is please referred to, Fig. 7 A is the schematic diagram of one antenna assembly 70 of the embodiment of the present invention, and Fig. 7 B to Fig. 7 E
For the part schematic diagram of antenna assembly 70.Antenna assembly 70 is derived by the antenna assembly 10 of Fig. 1 and the antenna assembly 50 of Fig. 5 A,
Therefore similar elements continue to use the same symbol expression.Antenna assembly 70 and 50 main difference of antenna assembly are in antenna assembly 70 compared with day
Line apparatus 50 increases localizer 700,702,704,706.In addition to this, antenna assembly 70 is equally operable in double frequency (such as
One, second band), and can be substantially in directive property and big in low-frequency band (such as second band) in high frequency band (such as first band)
It causes to be in omni-directional.
Specifically, localizer 700,702,704,706 is respectively arranged at the face B of substrate 104, the face D of substrate 106, base
The face A of plate 104, substrate 106 the face C, and respectively close to the edge radiator RT1 '~RT4 '.Wherein, it should be noted that, Fig. 7 C
And Fig. 7 E is the front view in the face B of substrate 104 and the face D of substrate 106, can cooperate Fig. 7 A and know localizer 700,702 relative to
The position radiator RT1 '~RT2 '.In other words, localizer 700 and 704 is set to the tow sides of substrate 104, and localizer
702 and 706 are set to the tow sides of substrate 106, this is assembling convenience, and without being limited thereto, and localizer 700,704 can also be set
The same face or localizer 702,706 that are placed in substrate 104 may be disposed at the same face of substrate 106, and it is arranged position and can also fit
Work as adjustment.In addition, the length of localizer 700,702,704,706 is about high frequency (such as the Band4 in previous embodiment) signal
Half-wavelength, and can be in appropriate adjustment, such as this example, the length of localizer 700,702,704,706 is greater than high-frequency path length.
Please continue to refer to Fig. 8 A to Fig. 8 E, Fig. 8 A, Fig. 8 B are respectively the S that antenna assembly 70 operates in Band13 and Band4
Parameter schematic diagram, wherein solid line indicates the reflection loss of (forming it by radiator RT1 ', RT3 ') first dipole antenna (i.e.
S11) analog result, dotted line indicate the reflection loss (i.e. S22) of (forming it by radiator RT2 ', RT4 ') second dipole antenna
Analog result, and dotted line then indicates transmission coefficient (i.e. S21 indicate isolation) of first dipole antenna with respect to the second dipole antenna
Analog result (S21 of Fig. 8 A, which exceeds, can indicate range and not show).Fig. 8 C, Fig. 8 D are respectively that the first dipole antenna operates in
The field pattern analog result of Band13 and Band4；Wherein, in Fig. 8 C, solid line indicates that the first dipole antenna operates in Band13
The field pattern of 750MHz, and triangle line indicates that the first dipole antenna operates in the field pattern of 780MHz in Band13；In Fig. 8 D, solid line
Indicate that the first dipole antenna operates in same polarization (Co-polarization) field pattern of 1740MHz in Band4, triangle line indicates
First dipole antenna operates in the same polarization field pattern of 2140MHz in Band4, and dotted line indicates that the first dipole antenna operates in Band4
Heteropolar (Cross-polarization) field pattern of middle 1740MHz, square line indicate that the first dipole antenna operates in Band4
The heteropolar field pattern of 2140MHz.Fig. 8 E, Fig. 8 F are respectively the field pattern simulation that the second dipole antenna operates in Band13 and Band4
As a result, wherein in Fig. 8 E, solid line indicates that the second dipole antenna operates in the field pattern of 750MHz in Band13, and triangle line table
Show that the second dipole antenna operates in the field pattern of 780MHz in Band13；In Fig. 8 F, dotted line indicates that the second dipole antenna operates in
The same polarization field pattern of 1740MHz in Band4, square line indicate that the second dipole antenna operates in the same polarization of 2140MHz in Band4
Field pattern, solid line indicate that the second dipole antenna operates in the heteropolar field pattern of 1740MHz in Band4, and triangle line indicates the second dipole
The heteropolar field pattern of antenna operation 2140MHz in Band4.
By Fig. 8 A and Fig. 8 B it is found that antenna assembly 70 can correct operation in Band13 and Band4, and the first dipole antenna and
Isolation between second dipole antenna is up to 30dB or more, more more than 40dB at low frequency, therefore can correctly operate.By Fig. 8 C to figure
8F is it is found that the first, second dipole antenna is substantially in omni-directional when operating in Band13, and is obviously in directive property when Band4；More
Importantly, range (the i.e. uplink of Band 4 of the first dipole antenna and the second dipole antenna in 1710MHz to 1755MHz
Frequency range) and 2110MHz to 2155MHz range (i.e. the lower link frequency range of Band 4) in, antenna highest-gain (Peak Gain)
It is all up 7dBi or more.It follows that antenna assembly 70 can improve the difference of high frequency antenna gain really compared to antenna assembly 50
It is different.
Antenna assembly 50,70 is to illustrate that the antenna assembly 10 of the embodiment of the present invention can be by changing radiation shape or increasing
Add localizer and reach different characteristics, however, antenna assembly 10,50,70 is all up into dual frequency operation, and can be big in high frequency band
Cause in directive property and in low-frequency band be substantially in omni-directional.In addition to this, those skilled in the art is when can be according to not homology
System demand, appropriate adjustment previous embodiment, and it is without being limited thereto.For example, Fig. 9 A to Fig. 9 H, Fig. 9 A to Fig. 9 H difference are please referred to
For the schematic diagram of antenna assembly of the embodiment of the present invention 900,902,904,906,908,910,912,914.Antenna assembly 900,
902,904,906,908,910,912,914 are all derived by the antenna assembly 70 of Fig. 7 A, and difference is to change antenna assembly
For the sake of clarity, and most of component symbol is omitted in 70 reflecting plate pattern.By Fig. 9 A to Fig. 9 C it is found that antenna assembly 900
Four side of reflecting plate is turned up, and the reflecting plate of antenna assembly 902,904 is bilateral vertically to be turned up, therefore antenna assembly 900,902,904 is anti-
The section for penetrating plate includes at least one bending.By Fig. 9 D, Fig. 9 E it is found that the reflecting plate of antenna assembly 906 is arc, antenna assembly
908 reflecting plate be arc and it is bilateral turn up, therefore the section of the reflecting plate of antenna assembly 906,908 include an at least segmental arc.
By Fig. 9 F, Fig. 9 G, Fig. 9 H it is found that the reflecting plate of antenna assembly 910 forms a cavity, and double frequency cross dipole antenna is substantially arranged
In cavity, the reflecting plate of antenna assembly 912,914 is turned up for double sided taper.Antenna assembly 900,902,904,906,908,
910,912,914 all meet requirement of the invention, in other words, as long as the reflecting plate of antenna assembly is projected on one along central axis (CL)
The projection result of the plane of reference is substantially square, and double frequency cross dipole antenna is projected on the projection knot of the plane of reference along central axis
Fruit corresponds roughly to two diagonal lines of square, then controls the catercorner length of square greater than signal corresponding to high frequency band
0.6 times of wavelength and it is less than 0.35 times of signal wavelength corresponding to low-frequency band, and reflecting plate and any high-frequency radiation part
Between 0.15 times and 0.25 times of minimum distance signal wavelength corresponding to the high frequency band, that is, it may conform to of the invention want
It asks；Wherein, the above-mentioned plane of reference is perpendicular to the one side of central axis, and 102 place plane of reflecting plate can be considered reference to example as shown in figure 1
Face.
In addition, Figure 10 A, Figure 10 B are respectively the schematic diagram of antenna assembly of the embodiment of the present invention 11,12.Antenna assembly 11,12
All derived by the antenna assembly 70 of Fig. 7 A, difference is to change the localizer pattern of antenna assembly 70, for the sake of clarity, and saves
Most of component symbol is omited.As can be seen from fig. 10A wherein a localizer is changed to list to antenna assembly 11 compared to antenna assembly 70
One strip is extended by central axis (CL) towards two sides, and another set localizer then keeps identical as antenna assembly 70.And
In Figure 10 B, two localizers of antenna assembly 12 are all changed to the form extended by central axial two sides.Antenna assembly 11,12 all may be used
Reach dual frequency operation, and can in high frequency band be substantially in directive property and in low-frequency band be substantially in omni-directional.
In the prior art, duplexer combination high and low frequency antenna need to be usually utilized, to realize the day for operating in high and low frequency
Line apparatus.In comparison, the embodiment of the present invention is not required to duplexer, and the antenna assembly for operating in high and low frequency can be realized；It is more important
, for the application that need to be adjusted aerial angle in due course or be directed toward position, such as household networking gear, according to the embodiment of the present invention
Antenna assembly, therefore can since antenna assembly can maintain omni-directional in low-frequency band when adjusting aerial angle or being directed toward position
The generation for reducing or avoiding signal dead angle can be used for maintaining wireless transmission function, avoid influencing use situation.
It in conclusion the antenna assembly of the embodiment of the present invention is operable in double frequency, and substantially can be in be directed toward in high frequency band
Property and be substantially in omni-directional in low-frequency band, thus can promote efficiency of transmission.
The above description is only a preferred embodiment of the present invention, all equivalent changes and modifications according to the claims in the present invention, all
It should belong to the scope of the present invention.
Claims (9)
1. a kind of antenna assembly, includes:
Double frequency cross dipole antenna, includes four radiators, and each radiator is extended by a central axial plane, and includes the
One irradiation unit and the second irradiation unit to receive and dispatch the wireless signal of a first band and a second band, and each radiator institute respectively
It is substantially in 90 degree in plane where plane and adjacent radiation body；And
Reflecting plate is set to the side of the double frequency cross dipole antenna；
It wherein, is substantially in a square along one first projection result that the central axis is projected on a plane of reference by the reflecting plate, it will
The double frequency cross dipole antenna corresponds roughly to the square along one second projection result that the central axis is projected on the plane of reference
Two diagonal lines, the plane of reference is perpendicular to the central axis；
Wherein, a centre frequency of the first band is higher than a centre frequency of the second band, which is somebody's turn to do
A pair of of diagonal length of square is greater than corresponding to the first band 0.6 times of signal wavelength and to be less than second band institute right
0.35 times of the signal wavelength answered, and the minimum distance of any first irradiation unit of the reflecting plate and four radiator between this
Between 0.15 times of signal wavelength corresponding to one frequency band and 0.25 times, keep the double frequency cross dipole antenna big in the first band
Cause in directive property and in the second band be substantially in omni-directional.
2. antenna assembly as described in claim 1, wherein a section of the reflecting plate includes at least one bending.
3. antenna assembly as described in claim 1, wherein a section of the reflecting plate includes an at least segmental arc.
4. antenna assembly as described in claim 1, wherein the reflecting plate forms a cavity, double frequency cross dipole antenna setting
In the cavity.
5. antenna assembly as described in claim 1, wherein each radiator of the double frequency cross dipole antenna also includes one
Localizer, for reinforcing the double frequency cross dipole antenna in the directive property of the first band.
6. antenna assembly as claimed in claim 5, wherein the localizer of each radiator is parallel to second irradiation unit, and
It is less than at a distance from first irradiation unit at a distance from second irradiation unit.
7. antenna assembly as claimed in claim 5, wherein the localizer of each radiator extends in one first plane, this
One plane is identical as the plane that each radiator is extended.
8. antenna assembly as claimed in claim 5, wherein the localizer of each radiator extends in one first plane, this
One plane is different from the plane that each radiator is extended.
9. antenna assembly as claimed in claim 5, wherein the length of the localizer of each radiator is relevant to first frequency
Band.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562143820P | 2015-04-07 | 2015-04-07 | |
| US62/143,820 | 2015-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106207422A CN106207422A (en) | 2016-12-07 |
| CN106207422B true CN106207422B (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510379968.4A Active CN106207422B (en) | 2015-04-07 | 2015-07-02 | Antenna assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106207422B (en) |
| TW (1) | TWI552444B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962341A (en) * | 2017-12-22 | 2019-07-02 | 网件公司 | Antenna structure and relevant building and application method |
| JP7015057B2 (en) * | 2018-08-27 | 2022-02-02 | 学校法人金沢工業大学 | Power converter |
| CN111800155B (en) * | 2019-04-08 | 2022-07-05 | 启碁科技股份有限公司 | Wireless device |
| US11336027B2 (en) * | 2020-03-05 | 2022-05-17 | Ixi Technology Holdings, Inc. | Filtering proximity antenna array |
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|---|---|---|---|---|
| CN1432206A (en) * | 2000-03-31 | 2003-07-23 | 纳夫科姆技术公司 | Nested turnstile antenna |
| CN102025030A (en) * | 2009-09-23 | 2011-04-20 | 宏达国际电子股份有限公司 | Plane directional antenna |
| CN103794883A (en) * | 2013-03-28 | 2014-05-14 | 深圳光启创新技术有限公司 | Directional antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI240456B (en) * | 2004-06-23 | 2005-09-21 | Smartant Telecom Co Ltd | Receiving antenna for satellite digital audio radio service |
| TWI356529B (en) * | 2008-03-25 | 2012-01-11 | Univ Southern Taiwan Tech | A cross monopole antenna with omnidirectional radi |
| TWM393048U (en) * | 2010-07-12 | 2010-11-21 | Dark Marketing Corp | Antenna using in a wireless transmission |
| TWI497815B (en) * | 2013-08-15 | 2015-08-21 | Wistron Neweb Corp | Cross type transmission module |
| TWI514662B (en) * | 2013-08-28 | 2015-12-21 | Wistron Neweb Corp | Cross type transmission module and assembling method thereof |
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2015
- 2015-06-29 TW TW104120869A patent/TWI552444B/en active
- 2015-07-02 CN CN201510379968.4A patent/CN106207422B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1432206A (en) * | 2000-03-31 | 2003-07-23 | 纳夫科姆技术公司 | Nested turnstile antenna |
| CN102025030A (en) * | 2009-09-23 | 2011-04-20 | 宏达国际电子股份有限公司 | Plane directional antenna |
| CN103794883A (en) * | 2013-03-28 | 2014-05-14 | 深圳光启创新技术有限公司 | Directional antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI552444B (en) | 2016-10-01 |
| TW201637288A (en) | 2016-10-16 |
| CN106207422A (en) | 2016-12-07 |
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