CN105449367B - A kind of multi-loop antenna - Google Patents
A kind of multi-loop antenna Download PDFInfo
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- CN105449367B CN105449367B CN201410374687.5A CN201410374687A CN105449367B CN 105449367 B CN105449367 B CN 105449367B CN 201410374687 A CN201410374687 A CN 201410374687A CN 105449367 B CN105449367 B CN 105449367B
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Abstract
The present invention relates to mobile communication technology fields, disclose a kind of multi-loop antenna.Second ring type vibrator of the multi-loop antenna is set in the ring of the first annular oscillator；The feeding point of the feeding point of the first annular oscillator and second ring type vibrator is coupled respectively to the feed end；The grounding point of the grounding point of the first annular oscillator and second ring type vibrator is coupled respectively to the ground terminal；It further include at least a pair of switches, and at least one resonance branch, the selectable both ends by the resonance branch of at least a pair of switches are connected to the first annular oscillator to change the resonance frequency of the first annular oscillator or the selectable both ends by the resonance branch and be connected to second ring type vibrator to change the resonance frequency in described second annular a period of time.The present invention switches the different working condition of antenna by least a pair of switches, makes multi-loop antenna that can meet the needs of different communication standard is to frequency range.
Description
Technical field
The present invention relates to mobile communication technology field more particularly to a kind of reconstruct multi-loop antennas applied to mobile terminal.
Background technique
With the development of communication technology, more stringent requirements are proposed is supported for the frequency range standard of mobile terminal, it is relatively former
Some 3G network equipment, the hand-held mobile terminal antenna of 4G network need support more frequency range demands and are just able to satisfy operator
It is required that；And the design requirement of miniaturization, light and thin type, make the technical bottleneck for being designed to complete machine radio-frequency performance of antenna.It is existing
Antenna form includes: multi-frequency monopole sub-antenna (monopole antenna), monocycle or double loop antenna (single loop and
Dual loop antenna), inverted folded antenna (IFA) and planar inverted folded antenna (PIFA).These antenna type according to
The different application of its condition used and performance is in different hand-held communication terminal environment.Wherein due to monocycle or double loop antenna
It is extensive with advantages such as wider low frequency bandwidth, lower SAR (absorption of human body ratio) value and stronger environment resistant interference
Be applied to electronic product in.As depicted in figs. 1 and 2, the first resonant tank 101 of double loop antenna is for generating the second resonance frequency
Rate F0；The first gap length 102 between first resonant tank 101 and the second resonant tank 103 is for generating resonance and control
The coefficient of coup between first resonant tank 101 and the second resonant tank 103, the resonance frequency are resonance frequency F1；Second is humorous
Vibration circuit 103 for generating third resonance frequency F2, the usual frequency bandwidth of double loop antenna for meet conventional 2G 3G antenna make
With.
However, existing monocycle or double loop antenna are only able to satisfy the need of band segment since design and production form are fixed
Ask, thus can not adapt to hand-held mobile terminal at this stage to TDD-LTE FDD-LTE all frequency ranges demand.
Summary of the invention
For the above problem existing for existing monocycle or double loop antenna, now providing one kind and aiming at can satisfy difference
The multi-loop antenna of demand of the standard to frequency range.
Specific technical solution is as follows:
A kind of multi-loop antenna characterized by comprising
One first annular oscillator；
One second ring type vibrator is set in the ring of the first annular oscillator；
The feeding point of one feed end, the feeding point of the first annular oscillator and second ring type vibrator is coupled respectively to
The feed end；
The grounding point of one ground terminal, the grounding point of the first annular oscillator and second ring type vibrator is coupled respectively to
The ground terminal；
Gap between the first annular oscillator and second ring type vibrator generates the first resonance frequency F1；
It further include that at least a pair of switches and at least one resonance branch, described at least a pair of switches is selectable by institute
The both ends for stating resonance branch are connected to the first annular oscillator to change the resonance frequency of the first annular oscillator, Huo Zheke
The both ends by the resonance branch of selection are connected to second ring type vibrator to change the resonance of second ring type vibrator
Frequency.
Preferably, the first annular oscillator is to generate the second resonance frequency F0.
Preferably, second ring type vibrator is to generate third resonance frequency F2, and third resonance frequency F2 > institute
State the second resonance frequency F0.
Preferably, the resonance branch includes: the first resonance branch；
At least a pair of switches includes a pair of of first switch, and the pair of first switch is selectable by first resonance point
The both ends of branch are connected to second ring type vibrator, keep second ring type vibrator controllable in using the pair of first
Part between switch is as part oscillator, and first resonance branch is used to switch as between the oscillator of part.
Preferably, first resonance branch is to generate the 4th resonance frequency F11.
Preferably, the first switch is single-pole double-throw switch (SPDT).
Preferably, the resonance branch further include: one second resonance branch；
The selectable both ends by second resonance branch of the pair of first switch are connected to the second annular vibration
Son, keep second ring type vibrator controllable in, use part between the pair of first switch as part oscillator, with
And use second resonance branch as switching between the oscillator of part or selectable by the two of first resonance branch
End be connected to second ring type vibrator, keep second ring type vibrator controllable in, using the pair of first switch it
Between part as part oscillator, and first resonance branch is used to switch as between the oscillator of part.
Preferably, the first switch is single-pole three-throw switch.
Preferably, the resonance branch further include: a third resonance branch；
The selectable both ends by the third resonance branch of the pair of first switch are connected to the second annular vibration
Son, keep second ring type vibrator controllable in, use part between the pair of first switch as part oscillator, with
And use the third resonance branch as switch between the oscillator of part or the pair of first switch is selectable will be described
The both ends of second resonance branch are connected to second ring type vibrator, keep second ring type vibrator controllable in using institute
The part between a pair of of first switch is stated as part oscillator, and uses second resonance branch as between the oscillator of part
Switching or the selectable both ends by first resonance branch are connected to second ring type vibrator, make second ring
Shape oscillator is controllable in using part between the pair of first switch as part oscillator, and use described first
Resonance branch switches as between the oscillator of part.
Preferably, the first switch is four throw switch of hilted broadsword.
Preferably, the resonance branch includes: one the 4th resonance branch；
At least a pair of switches includes a pair of of second switch, and the pair of second switch is selectable by the 4th resonance point
The both ends of branch are connected to the first annular oscillator, keep the first annular oscillator controllable in using the pair of second
Part between switch is as part oscillator, and the 4th resonance branch is used to switch as between the oscillator of part.
Preferably, the second switch is single-pole double-throw switch (SPDT).
Preferably, the resonance frequency point ranges of the second resonance frequency F0 are between 500MHz-1000MHz.
Preferably, the resonance frequency point ranges of third resonance frequency F2 are between 1750MHz-2200MHz.
Preferably, the resonance frequency point ranges of the 4th resonance frequency F11 are between 1000MHz-F1.
Above-mentioned technical proposal the utility model has the advantages that switch the different working condition of antenna by least a pair of switches, make polycyclic
Antenna can meet the needs of different communication standard is to frequency range.
Detailed description of the invention
Fig. 1 is the circuit diagram of existing double loop antenna；
Fig. 2 is the return loss plot figure of emulation and the test of existing double loop antenna；
Fig. 3 is the circuit diagram of the first embodiment of multi-loop antenna of the present invention；
Fig. 4 is the return loss plot figure of emulation and the test of multi-loop antenna of the present invention；
Fig. 5 is the circuit diagram of second of embodiment of multi-loop antenna of the present invention；
Fig. 6 is the circuit diagram of the third embodiment of multi-loop antenna of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
As shown in Figures 3 to 5, a kind of multi-loop antenna, comprising:
First annular oscillator 201；
Second ring type vibrator 204 is set in the ring of first annular oscillator 201；
The feeding point of feed end 206, the feeding point of first annular oscillator 201 and the second ring type vibrator 204 is coupled respectively to
Feed end 206；
The grounding point of ground terminal 205, the grounding point of first annular oscillator 201 and the second ring type vibrator 204 is coupled respectively to
Ground terminal 205；
Gap between first annular oscillator 201 and the second ring type vibrator 204 generates the first resonance frequency F1；
It further include that at least a pair of switches and at least one resonance branch, at least a pair of switches is selectable by resonance point
Branch both ends be connected to first annular oscillator 201 with change the resonance frequency of first annular oscillator 201 or it is selectable will be humorous
The both ends of vibration branch are connected to the second ring type vibrator 204 to change the resonance frequency of the second ring type vibrator 204.
Switch the different working conditions of antenna by least a pair of switches in the present embodiment to meet different communication system
Demand of the formula to frequency range.
In a preferred embodiment, first annular oscillator 201 is to generate the second resonance frequency F0, resonance frequency point ranges
Between 500MHz-1000MHz, the second ring type vibrator 204 exists to generate third resonance frequency F2, resonance frequency point ranges
Between 1750MHz-2200MHz, and the third resonance frequency resonance frequency F0 of F2 > second, as shown in figure 4, first annular oscillator 201
The second gap length 207 between the second ring type vibrator 204 exists for generating the first resonance frequency F1, resonance frequency point ranges
Between 1500MHz-1750MHz, and the coefficient of coup between the first annular oscillator 201 of control and the second ring type vibrator 204,
In the second resonance frequency of resonance frequency F0 < first F1 < third resonance frequency F2.
It in a preferred embodiment, include: the first resonance branch 208 in resonance branch；
At least a pair of switches includes a pair of of first switch (209a, 209b), and a pair of of first switch (209a, 209b) may be selected
The both ends by the first resonance branch 208 be connected to the second ring type vibrator 204, keep the second ring type vibrator 204 controllable in making
The part between the pair of first switch (209a, 209b) is used to make as part oscillator, and using the first resonance branch 208
Switch between the oscillator of part.
In the present embodiment, the first resonance branch 208 be set to first annular oscillator 201 and the second ring type vibrator 204 it
Between, two first switches (209a, 209b) are to switch antenna current circuit, to change the resonant state of antenna, such as Fig. 3 and
It altogether include the current loop of two states shown in Fig. 4.In the sequence of the current loop of first state are as follows: feed end 206, first
Switch 209a, the second ring type vibrator 204, first switch 209b, ground terminal 205 swash for completing third resonance frequency F2 resonance
Hair.First annular oscillator 201 generates the second resonance frequency F0, and the between first annular oscillator 201 and the second ring type vibrator 204
Two gap lengths 207 are for producing between the first resonance frequency F1 and first annular oscillator 201 and the second ring type vibrator 204
The coefficient of coup；Second ring type vibrator 204 is for generating third resonance frequency F2.
The sequence of the current loop of second state are as follows: feed end 206, first switch 209a, the first resonance branch 208,
One switch 209b, ground terminal 205.First resonance branch 208 changes for generating the 4th resonance frequency F11, the first resonance branch 208
The oscillator length of original second ring type vibrator 204 and gap length (the second gap between first annular oscillator 201 are become
The coefficient of coup at interval 207), the oscillator length of the first resonance branch 208 is greater than original second ring type vibrator 204, accordingly
First resonance frequency F1 is reduced to the 5th resonance frequency F01, and resonance frequency point ranges are between 500MHz-F1, while the first ring
The coefficient of coup is corresponding between shape oscillator 201 and the first resonance branch 208 changes, so as to complete the extension in broadband.
In a preferred embodiment, the first resonance branch 208 is to generate the 4th resonance frequency F11, and the second resonance frequency
The resonance frequency of rate F0 < the 4th F11 < third resonance frequency F2, the resonance frequency point ranges of the 4th resonance frequency F11 are in 1000MHz-F1
Between.
In a preferred embodiment, first switch (209a, 209b) is single-pole double-throw switch (SPDT).Two lists in the present embodiment
The non-moving end of double-pole double throw switch is set on feed end 206 and ground terminal 205, and moved end is used in the second ring type vibrator 204 and the
It is switched between one resonance branch 208.
As shown in figure 5, in a preferred embodiment, in resonance branch further include: the second resonance branch 210；
A pair of of selectable both ends by the second resonance branch 210 of first switch (209a, 209b) are connected to the second annular
Oscillator 204, keep the second ring type vibrator 204 controllable in, use part between a pair of of first switch (209a, 209b) as
Part oscillator, and use the second resonance branch 210 as switching between the oscillator of part or selectable by the first resonance point
The both ends of branch 208 are connected to the second ring type vibrator 204, keep the second ring type vibrator 204 controllable in using a pair of of first switch
Part between (209a, 209b) is as part oscillator, and uses first resonance branch 208 as between the oscillator of part
Switching.
The second resonance branch 210 is set in the ring of the second ring type vibrator 204 in the present embodiment；It is opened by a pair first
It closes (209a, 209b) and switches antenna current circuit, the oscillator length of the second resonance branch 210 is less than the second ring type vibrator 204
Oscillator length, and the gap length between first annular oscillator 201 is changed, corresponding resonance frequency changes, and the
The coefficient of coup is corresponding between one ring type vibrator 201 and the second resonance branch 210 changes, to change bandwidth.
Change the resonant state of antenna, altogether includes three kinds of state current circuits.
The current loop of first state are as follows: feed end 206, first switch 209a, the second ring type vibrator 204, first switch
209b, ground terminal 205.
The current loop of second state are as follows: feed end 206, first switch 209a, the first resonance branch 208, first switch
209b, ground terminal 205.
The current loop of the third state are as follows: feed end 206, first switch 209a, the second resonance branch 210, first switch
209b, ground terminal 205.
In a preferred embodiment, first switch (209a, 209b) is single-pole three-throw switch.Two lists in the present embodiment
The non-moving end of double-pole double throw switch is set on feed end 206 and ground terminal 205, and moved end is used in the second ring type vibrator 204, first
It is switched between resonance branch 208 and the second resonance branch 210, to meet the needs of different communication standard is to frequency range.
As shown in figure 5, in a preferred embodiment, in resonance branch further include: third resonance branch 211；
A pair of of selectable both ends by third resonance branch 211 of first switch (209a, 209b) are connected to the second annular
Oscillator 204, keep the second ring type vibrator 204 controllable in, use part between a pair of of first switch (209a, 209b) as
Part oscillator, and third resonance branch 211 is used to switch as between the oscillator of part, or a pair of of first switch (209a,
209b) the selectable both ends by the second resonance branch 210 are connected to the second ring type vibrator 204, make the second ring type vibrator 204 can
Control in using part between a pair of of first switch (209a, 209b) as part oscillator, and divide using the second resonance
Switch between 210 conduct part oscillators of branch or the selectable both ends by the first resonance branch 208 are connected to the second annular vibration
Son 204 keeps the second ring type vibrator 204 controllable in using part between a pair of of first switch (209a, 209b) as portion
Divide oscillator, and the first resonance branch 208 is used to switch as between the oscillator of part.
Third resonance branch 211 is set to 210 inside of the second resonance branch in the present embodiment, passes through first switch
(209a, 209b) switches antenna current circuit, the vibration of the oscillator length of third resonance branch 211 less than the second resonance branch 210
Sub- length, and the gap length between first annular oscillator 201 is changed, corresponding resonance frequency changes, and first
The coefficient of coup is corresponding between ring type vibrator 201 and third resonance branch 211 changes, to change bandwidth.Include altogether
Four kinds of state current circuits:
The current loop of first state are as follows: feed end 206, first switch 209a, the second ring type vibrator 204, first switch
209b, ground terminal 205.
The current loop of second state are as follows: feed end 206, first switch 209a, the first resonance branch 208, first switch
209b, ground terminal 205.
The current loop of the third state are as follows: feed end 206, first switch 209a, the second resonance branch 210, first switch
209b, ground terminal 205.
The current loop of 4th state are as follows: feed end 206, first switch 209a, third resonance branch 211, first switch
209b, ground terminal 205.
In a preferred embodiment, first switch (209a, 209b) is four throw switch of hilted broadsword.Two lists in the present embodiment
The non-moving end of double-pole double throw switch is set on feed end 206 and ground terminal 205, and moved end is used in the second ring type vibrator 204, first
It is switched between resonance branch 208, the second resonance branch 210 and third resonance branch 211, it can by four throw switch of hilted broadsword
It to obtain a variety of different conditions accordingly, therefrom chooses and is preferably fixed as user's frequency of use, can preferably extend original day
The resonant state of line.By the debugging of early period, it can use several different working conditions to meet different communication standard to frequency
Section demand, thus meet mobile terminal to 2G 3G 4G different frequency range the needs of, simplify the design difficulty of 4G multifrequency antenna.
Further, first switch (209a, 209b) is single pole multiple throw, and oscillation circuit is that multichannel is opposite with single pole multiple throw
It answers.
In a preferred embodiment, as shown in fig. 6, in resonance branch further include: the 4th resonance branch 202；
At least a pair of switches includes a pair of of second switch (203a, 203b), and a pair of of second switch (203a, 203b) may be selected
The both ends by the 4th resonance branch 202 be connected to first annular oscillator 201, keep first annular oscillator 201 controllable in making
It uses the part between a pair of of second switch (203a, 203b) as part oscillator, and uses the 4th resonance branch 202 as portion
Divide between oscillator and switches.
In the present embodiment the 4th resonance branch 202 be set to first annular oscillator 201 and the second ring type vibrator 204 it
Between, the oscillator length of the 4th resonance branch 202 is less than the oscillator length of first annular oscillator 201, two second switches (203a,
203b) to switch antenna current circuit, to change the resonant state of antenna, as shown in fig. 6, altogether including the electricity of two states
Flow back to road.In the sequence of the current loop of first state are as follows: feed end 206, second switch 203a, first annular oscillator 201,
One switch 203b, ground terminal 205.The sequence of the current loop of second state are as follows: feed end 206, second switch 203a, the first ring
Shape oscillator 201, the 4th resonance branch 202, first switch 203b, first annular oscillator 201, ground terminal 205.Pass through switching circuit
Oscillator length can effectively adjust resonance frequency to adjust the oscillator length of resonant tank, to reach the mesh of switching frequency range
's.
In a preferred embodiment, second switch (203a, 203b) is single-pole double-throw switch (SPDT), and hilted broadsword is double in the present embodiment
The non-moving end of throw switch is set on first annular oscillator 201, and moved end is used in first annular oscillator 201 and the 4th resonance branch
Switch between 202.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all be included within the scope of the present invention.
Claims (14)
1. a kind of multi-loop antenna characterized by comprising
One first annular oscillator；
One second ring type vibrator is set in the ring of the first annular oscillator；
The feeding point of one feed end, the feeding point of the first annular oscillator and second ring type vibrator is coupled respectively to described
Feed end；
The grounding point of one ground terminal, the grounding point of the first annular oscillator and second ring type vibrator is coupled respectively to described
Ground terminal；
Gap between the first annular oscillator and second ring type vibrator generates the first resonance frequency F1；
It further include at least a pair of switches and at least one resonance branch, described at least a pair of switches is selectable will be described humorous
The both ends of vibration branch are connected to the first annular oscillator to change the resonance frequency of the first annular oscillator, or may be selected
The both ends by the resonance branch be connected to second ring type vibrator to change the resonance frequency of second ring type vibrator；
The resonance branch includes: one the 4th resonance branch；
At least a pair of switches includes a pair of of second switch, and the pair of second switch is selectable by the 4th resonance branch
Both ends are connected to the first annular oscillator, keep the first annular oscillator controllable in using the pair of second switch
Between part as part oscillator, and the 4th resonance branch is used to switch as between the oscillator of part, to adjust
State the oscillator length of the resonant tank of multi-loop antenna.
2. multi-loop antenna as described in claim 1, which is characterized in that the first annular oscillator is to generate the second resonance frequency
F0。
3. multi-loop antenna as claimed in claim 2, which is characterized in that second ring type vibrator is to generate third resonance frequency
F2, and the third resonance frequency F2 > second resonance frequency F0.
4. multi-loop antenna as described in claim 1, which is characterized in that the resonance branch includes the first resonance branch；
At least a pair of switches includes a pair of of first switch, and the pair of first switch is selectable by first resonance branch
Both ends are connected to second ring type vibrator, keep second ring type vibrator controllable in using the pair of first switch
Between part as part oscillator, and first resonance branch is used to switch as between the oscillator of part.
5. multi-loop antenna as claimed in claim 4, which is characterized in that first resonance branch is to generate the 4th resonance frequency
F11。
6. multi-loop antenna as claimed in claim 4, which is characterized in that the first switch is single-pole double-throw switch (SPDT).
7. multi-loop antenna as claimed in claim 4, which is characterized in that the resonance branch further include: one second resonance branch；
The selectable both ends by second resonance branch of the pair of first switch are connected to second ring type vibrator, make
Second ring type vibrator is controllable in using the part between the pair of first switch as part oscillator, and make
Use second resonance branch as switching between the oscillator of part or the selectable both ends by first resonance branch connect
It is connected to second ring type vibrator, keeps second ring type vibrator controllable in using between the pair of first switch
Part is used as part oscillator, and first resonance branch is used to switch as between the oscillator of part.
8. multi-loop antenna as claimed in claim 7, which is characterized in that the first switch is single-pole three-throw switch.
9. multi-loop antenna as claimed in claim 7, which is characterized in that the resonance branch further include: a third resonance branch；
The selectable both ends by the third resonance branch of the pair of first switch are connected to second ring type vibrator, make
Second ring type vibrator is controllable in using the part between the pair of first switch as part oscillator, and make
Use the third resonance branch as switching between the oscillator of part or the pair of first switch is selectable by described second
The both ends of resonance branch are connected to second ring type vibrator, keep second ring type vibrator controllable in using described one
To the part between first switch as part oscillator, and second resonance branch is used to cut as between the oscillator of part
It changes or the selectable both ends by first resonance branch is connected to second ring type vibrator, make second annular
Oscillator is controllable in using part between the pair of first switch as part oscillator, and humorous using described first
Vibration branch switches as between the oscillator of part.
10. multi-loop antenna as claimed in claim 9, which is characterized in that the first switch is four throw switch of hilted broadsword.
11. multi-loop antenna as described in claim 1, which is characterized in that the second switch is single-pole double-throw switch (SPDT).
12. multi-loop antenna as claimed in claim 2, which is characterized in that the resonance frequency point ranges of the second resonance frequency F0 exist
Between 500MHz-1000MHz.
13. multi-loop antenna as claimed in claim 3, which is characterized in that the resonance frequency point ranges of third resonance frequency F2 exist
Between 1750MHz-2200MHz.
14. multi-loop antenna as claimed in claim 5, which is characterized in that the resonance frequency point ranges of the 4th resonance frequency F11 exist
Between 1000MHz-F1.
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| CN201410374687.5A CN105449367B (en) | 2014-07-31 | 2014-07-31 | A kind of multi-loop antenna |
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| CN201410374687.5A CN105449367B (en) | 2014-07-31 | 2014-07-31 | A kind of multi-loop antenna |
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| CN105449367B true CN105449367B (en) | 2019-03-12 |
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| CN113839210A (en) * | 2021-09-30 | 2021-12-24 | 海南宝通实业公司 | Tuning device with loop antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102099965A (en) * | 2008-07-17 | 2011-06-15 | 高通股份有限公司 | Adaptive matching and tuning of hf wireless power transmit antenna |
| EP2568529A1 (en) * | 2011-09-08 | 2013-03-13 | Research In Motion Limited | Mobile device having reconfigurable antenna and associated methods |
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2014
- 2014-07-31 CN CN201410374687.5A patent/CN105449367B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102099965A (en) * | 2008-07-17 | 2011-06-15 | 高通股份有限公司 | Adaptive matching and tuning of hf wireless power transmit antenna |
| EP2568529A1 (en) * | 2011-09-08 | 2013-03-13 | Research In Motion Limited | Mobile device having reconfigurable antenna and associated methods |
Non-Patent Citations (1)
| Title |
|---|
| 《一种小型三频段印刷天线设计》;宫晗;《天津职业技术师范大学学报》;20120930;第22卷(第3期);31-33页 |
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