CN102420686B - A kind of frequency division duplex device and mobile terminal - Google Patents
A kind of frequency division duplex device and mobile terminal Download PDFInfo
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- CN102420686B CN102420686B CN201110376650.2A CN201110376650A CN102420686B CN 102420686 B CN102420686 B CN 102420686B CN 201110376650 A CN201110376650 A CN 201110376650A CN 102420686 B CN102420686 B CN 102420686B
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- 238000010897 surface acoustic wave method Methods 0.000 claims abstract description 38
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000003780 insertion Methods 0.000 abstract description 38
- 230000037431 insertion Effects 0.000 abstract description 38
- 238000005516 engineering process Methods 0.000 description 6
- 230000001629 suppression Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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Abstract
The invention discloses a kind of frequency division duplex device, comprising: receiving path and transmitting path, transmitting path adopts low pass filter or band limiting filter.In addition, additionally provide a kind of mobile terminal, comprising: transceiver, transmitting SAW (Surface Acoustic Wave) filter, power amplifier, frequency division duplex device and antenna; Transceiver, for receiving or sending signal, one end is connected with the input launching SAW (Surface Acoustic Wave) filter, and the other end is connected with the receiving terminal of frequency division duplex device; Launch SAW (Surface Acoustic Wave) filter, for select transmit frequency, output is connected with the input of power amplifier; Power amplifier, output is connected with the transmitting terminal of frequency division duplex device; Frequency division duplex device, comprises receiving path and transmitting path, and transmitting path adopts low pass filter or band limiting filter, and external connection end is connected with antenna.By the way, the present invention effectively can reduce the insertion loss of duplexer, reduces the caloric value of mobile terminal.
Description
Technical field
The present invention relates to communication field, particularly relate to a kind of frequency division duplex device and mobile terminal.
Background technology
Mobile terminal now adopts the pattern that simultaneously works of transmitting-receiving path usually, and in order to realize this mode of operation, duplexer is absolutely necessary equipment.It is made up of the band pass filter of two groups or more different frequencies usually, to received signal and transmit and isolate, avoids transmitting of mobile terminal to be transferred to receiver.But the insertion loss of the duplexer under technology today level is very large, and its reason has:
(1) if the tranmitting frequency of mobile terminal is between 1850MHz-1910MHz, and receive frequency is between 1930MHz-1990MHz, and thus, the parameter of band pass filter is required to be centre frequency 1950MHz, transition band 20MHz.Such band stop filter not only implements very difficult, and insertion loss is also very large.As WCDMA uses, frequency range is the duplexer of 1900MHz, and its insertion loss is at more than 2.5dB.
(2) under the pattern that simultaneously works of transmitting-receiving path, receiving path requires that signal also can work under extremely faint signal, and its representative value is-110dBm; Transmitting path then requires that transmitting power improves as much as possible, and to guarantee the reception of other mobile terminal, its representative value is 28dB.And under mobile terminal is operated in non-linear environment, the transmitting power up to 28dB must cause very strong clutter interference, if the direct feed-in receiving path of these clutter interference, gently then affect the sensitivity of receiving path, heavy then directly flood Received signal strength.Such as, under the transmitting power of 28dB, transmitting path will export the noise of-132dBm/Hz, and the input noise that receiving path requires must lower than-173dBm/Hz, therefore, typical duplexer must provide the isolation of 41dB, thus causes the insertion loss of duplexer very large.
Big insertion loss like this will cause following problem:
(1) export enough power in order to ensure transmitting path, the amplifier of duplexer previous stage must improve power output, thus causes the power consumption of mobile terminal to increase, has increased the weight of the load of battery of mobile terminal.
(2) power output of amplifier improves the increase that will inevitably cause caloric value.The heating of mobile terminal can have influence on the use safety of battery and the experience of user.
(3) power output of amplifier improves the technical indicator that namely improve amplifier, and raising necessity of technical indicator causes the raising of cost.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of frequency division duplex device, effectively can reduce the insertion loss of duplexer.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of frequency division duplex device, comprise: receiving path and transmitting path, described transmitting path adopts low pass filter, described low pass filter is capacitor and inductor filter, described capacitor and inductor filter comprises five groups of LC ∏ type filter circuits, described LC ∏ type filter circuit comprises the first electric capacity, inductance and the second electric capacity, described first electric capacity one end earth terminal, the other end is connected with inductance one end, the other end of inductance is connected with one end of the second electric capacity, the other end earth terminal of the second electric capacity, and first group of LC ∏ type filter circuit and second group of LC ∏ type filter circuit share the second electric capacity of first group of LC ∏ type filter circuit, second group of LC ∏ type filter circuit and the 3rd group of LC ∏ type filter circuit share the second electric capacity of second group of LC ∏ type filter circuit, the like, the value of the first electric capacity of the LC ∏ type filter circuit of first group is 4.2pF, the value of inductance is 4.1nH, the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of second group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 3rd group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 4th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 5th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 6th group is 5.1nH, and the value of the second electric capacity is 3.3pF.
Wherein, comprising: transceiver, transmitting SAW (Surface Acoustic Wave) filter, power amplifier, frequency division duplex device and antenna, transceiver, for receiving or sending signal, one end is connected with the input of described transmitting SAW (Surface Acoustic Wave) filter, and the other end is connected with the receiving terminal of described frequency division duplex device, launch SAW (Surface Acoustic Wave) filter, for select transmit frequency, output is connected with the input of described power amplifier, power amplifier, output is connected with the transmitting terminal of described frequency division duplex device, frequency division duplex device, comprise receiving path and transmitting path, described transmitting path adopts low pass filter, external connection end is connected with described antenna, wherein, described low pass filter is capacitor and inductor filter, described capacitor and inductor filter comprises many group LC ∏ type filter circuits, described LC ∏ type filter circuit comprises the first electric capacity, inductance and the second electric capacity, described first electric capacity one end earth terminal, the other end is connected with one end of inductance, the other end of inductance is connected with one end of the second electric capacity, the other end earth terminal of the second electric capacity, and first group of LC ∏ type filter circuit and second group of LC ∏ type filter circuit share the second electric capacity of first group of LC ∏ type filter circuit, second group of LC ∏ type filter circuit and the 3rd group of LC ∏ type filter circuit share the second electric capacity of second group of LC ∏ type filter circuit, the like, the value of the first electric capacity of the LC ∏ type filter circuit of first group is 4.2pF, the value of inductance is 4.1nH, the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of second group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 3rd group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 4th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 5th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 6th group is 5.1nH, and the value of the second electric capacity is 3.3pF, the reception band noise level of described receiving path is-173dBm/Hz, the degree of suppression of described reception frequency range is at below 20dB, described transceiver is 6.5dBm in the peak power output of frequency range 1,4,5,8, minimum output power is-76dBm, and receiving band noise is-140dBm/Hz, is 7dBm in the peak power output of frequency range 2, minimum output power is-76dBm, and receiving band noise is-139dBm/Hz, described transmitting SAW (Surface Acoustic Wave) filter is 2.5dB at the insertion loss of each frequency range, receives frequency range decay and is 30dB, described power amplifier is 24dB at the transmit frequency band gain amplifier of each frequency range, and in receiving belt, gain amplifier is 18dB, and it is-151dBm/Hz that total output receives band noise, described frequency division duplex device is 0.5dB at the insertion loss of frequency range 1,4,5,8, is 1dB at the insertion loss of frequency range 2, is 20dB in each frequency range to receiving the noise attentuation of frequency range, and exporting and receiving band noise is-173.5dBm/Hz.
Wherein, described terminal also comprises: matching network device, and for realizing the impedance matching between transceiver and antenna, one end is connected with the output of frequency division duplex device, and the other end is connected with antenna.
The invention has the beneficial effects as follows: the very large situation of insertion loss being different from prior art duplexer, the invention provides a kind of duplexer of Frequency Division Duplexing (FDD), its transmitting path adopts the low pass filter of low insertion loss or band limiting filter to instead of the band stop filter of original high insertion loss, and redefined the parameter of all parts according to the reception band noise level of receiving path and the degree of suppression of reception frequency range, and then effectively reduce the insertion loss of duplexer, reduce the caloric value of mobile terminal.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of frequency division duplex device one embodiment of the present invention;
Fig. 2 is frequency division duplex device insertion loss performance diagram of the present invention;
Fig. 3 is the structural representation of mobile terminal one embodiment of the present invention;
Fig. 4 is the structural representation of another embodiment of mobile terminal of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Duplexer is requisite equipment in mobile terminal, and duplexer, by the different frequency separation of division two, makes receiving path and transmitting path be operated in different frequency separations, just can easily by reception information and transmission data separation out.But duplexer now adopts band stop filter to realize usually.By the restriction of the operating frequency of mobile terminal, the transition band of this band stop filter can only be 20MHz, and must provide the isolation up to 41dB, thus causes the insertion loss of duplexer very large.
In order to solve the problem, the invention provides a kind of frequency division duplex device, comprise receiving path and transmitting path.And transmitting path adopts the low pass filter of low insertion loss or band limiting filter to carry out the band stop filter of alternative high insertion loss.
As shown in Figure 1 be a kind of capacitor and inductor filter, be the one in low pass filter.
LC ∏ type filter circuit comprises the first electric capacity, inductance and the second electric capacity, first electric capacity one end earth terminal, and the other end is connected with inductance one end, and the other end of inductance is connected with one end of the second electric capacity, the other end earth terminal of the second electric capacity.
Capacitor and inductor filter comprises many group LC ∏ type filter circuits, and first group of LC ∏ type filter circuit and second group of LC ∏ type filter circuit share the second electric capacity of first group of LC ∏ type filter circuit, second group of LC ∏ type filter circuit and the 3rd group of LC ∏ type filter circuit share the second electric capacity of second group of LC ∏ type filter circuit, the like.When the value of capacitor and inductor is different, the characteristic curve of filtering is not identical yet.In the present embodiment, the value of the first electric capacity of the LC ∏ type filter circuit of first group is 4.2pF, and the value of inductance is 4.1nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of second group is 6.2nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 3rd group is 6.2nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 4th group is 5.6nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 5th group is 5.6nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 6th group is 5.1nH, and the value of the second electric capacity is 3.3pF.
Using the link of the first electric capacity of first group of LC ∏ type filter circuit and inductance as input, second electric capacity of the 6th group of LC ∏ type filter circuit and the link of inductance are as output, capacitor and inductor filter insertion loss characteristic curve can be obtained by emulation technology, as shown in Figure 2, can show that changing capacitor and inductor filter insertion loss maximum is 0.3dB, far below the representative insertion loss value 2.5dB of the duplexer of common use band stop filter.
Be different from the very large situation of insertion loss of prior art duplexer, the invention provides a kind of frequency division duplex device, its transmitting path adopts the low pass filter of low insertion loss or band limiting filter to instead of the band stop filter of original high insertion loss, and then effectively reduces the insertion loss of duplexer.
Present invention also offers a kind of mobile terminal, as shown in Figure 3, comprising: transceiver 110, transmitting SAW (Surface Acoustic Wave) filter 120, power amplifier 130, frequency division duplex device 140, net mate device 150 and antenna 160.
Transceiver 110 is for receiving or sending signal, and one end is connected with the input launching SAW (Surface Acoustic Wave) filter 120, and the other end is connected with the receiving terminal of frequency division duplex device 140.
Launch SAW (Surface Acoustic Wave) filter 120 output to be connected with the input of power amplifier 130.Input electrical signal is converted to acoustical signal by input transducer, acoustical signal is propagated along piezoelectric substrate surface, and is converted into the signal of telecommunication at output transducer, by selecting suitable substrate material, and two transducers are weighted, and then realize He Ne laser function.By launching the selection index system of SAW (Surface Acoustic Wave) filter 120, can make transmits is limited in specific frequency, and filters the interference signal on non-operating frequency.
Power amplifier 130 output is connected with the transmitting terminal of frequency division duplex device 140.Transmit after the amplification of power amplifier, obtain enough power and be sent in space by antenna 160, with as much as possible by next receiving terminal, as base station, mobile terminal receive.
Frequency division duplex device 140 comprises receiving path and transmitting path.And transmitting path adopts the low pass filter of low insertion loss or band limiting filter to carry out the band stop filter of alternative high insertion loss.
As shown in Figure 1 be a kind of capacitor and inductor filter, be the one in low pass filter.
LC ∏ type filter circuit comprises the first electric capacity, inductance and the second electric capacity, first electric capacity one end earth terminal, and the other end is connected with inductance one end, and the other end of inductance is connected with one end of the second electric capacity, the other end earth terminal of the second electric capacity.
Capacitor and inductor filter comprises many group LC ∏ type filter circuits, and first group of LC ∏ type filter circuit and second group of LC ∏ type filter circuit share the second electric capacity of first group of LC ∏ type filter circuit, second group of LC ∏ type filter circuit and the 3rd group of LC ∏ type filter circuit share the second electric capacity of second group of LC ∏ type filter circuit, the like.When the value of capacitor and inductor is different, the characteristic curve of filtering is not identical yet.In the present embodiment, the value of the first electric capacity of the LC ∏ type filter circuit of first group is 4.2pF, and the value of inductance is 4.1nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of second group is 6.2nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 3rd group is 6.2nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 4th group is 5.6nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 5th group is 5.6nH, and the value of the second electric capacity is 4.3pF.The value of the inductance of the LC ∏ type filter circuit of the 6th group is 5.1nH, and the value of the second electric capacity is 3.3pF.
Using the link of the first electric capacity of first group of LC ∏ type filter circuit and inductance as input, second electric capacity of the 6th group of LC ∏ type filter circuit and the link of inductance are as output, capacitor and inductor filter insertion loss characteristic curve can be obtained by emulation technology, as shown in Figure 2, can show that changing capacitor and inductor filter insertion loss maximum is 0.3dB, far below the representative insertion loss value 2.5dB of the duplexer of common use band stop filter.
Matching network device 150 is for realizing the impedance matching between transceiver 110 and antenna 160, and one end is connected with the output of frequency division duplex device 140, and the other end is connected with antenna 160.
Antenna 160 is printed antenna, is printed on circuit board, and Received signal strength and transmitting all is received and dispatched by antenna 160.In other embodiments, can be also metal stick antenna etc., the present invention be not construed as limiting.
Mobile terminal of the present invention goes for polytype mobile communication technology, as CDMA, WCDMA, GSM etc.In order to state better, state for WCDMA below.
According to world agreement, WCDMA has nine working frequency range:
| Working frequency range | Frequency (MHz) | Work country |
| Frequency range 1 | 2,100 | |
| Frequency range 2 | 1,900 | |
| Frequency range 3 | 1,800 | |
| Frequency range 4 | 2,100/1,700 | |
| Frequency range 5 | 850 | The U.S. |
| Frequency range 6 | 850 | Japan |
| Frequency range 7 | 2,500 | |
| Frequency range 8 | 900 | |
| Frequency range 9 | 1,700 | Japan |
As shown in Figure 4, mobile terminal provided by the present invention can be operated in frequency range 1,2,4,5,8 by unrestricted choice, and thus, mobile terminal is provided with multiple branch, there are transmitting SAW (Surface Acoustic Wave) filter 220, power amplifier 230, frequency division duplex device 240 in each branch, matching network device 250.The selection operating frequency of each transmitting SAW (Surface Acoustic Wave) filter 220 is different, can arrange respectively and be operated in frequency range 1,2,4,5,8.Signal after launching SAW (Surface Acoustic Wave) filter 220 and selecting is amplified by power amplifier 230, and the transmitting path through frequency division duplex device 240 is transferred to matching network device 270, then through multiplex operation switch 270, is transferred in antenna 260.If when antenna 260 receives Received signal strength, be transferred to matching network device 270 through multiplex operation switch 270, be then transferred to transceiver 210 by the receiving path of frequency division duplex device.
Although mobile terminal uses low pass filter can reduce the insertion loss of frequency division duplex device 240, but the character due to low pass filter itself can cause the degree of suppression receiving frequency range to be deteriorated, in order to ensure the quality of communication, the requirement of noise to power amplifier 230 and transceiver 210 can be increased.Under the prior art, increase and be difficult to realize to the noise suppressed of power amplifier 230 and transceiver 210.Thus, need the parameter of the various piece redistributing mobile terminal, make to receive the degree of suppression of frequency range is operated in can in range of receiving.
First, determine that the reception band noise level of mobile terminal receiving path is-173dBm/Hz, the maximum degree of suppression receiving frequency range is 20dB.
Therefore in the worst situation of noise, transceiver 210 is 6.5dBm in the peak power output of frequency range 1,4,5,8, minimum output power is-76dBm, receiving band noise is-140dBm/Hz, be 7dBm in the peak power output of frequency range 2, minimum output power is-76dBm, and receiving band noise is-139dBm/Hz.
Launch SAW (Surface Acoustic Wave) filter 220 and be 2.5dB at the insertion loss of each frequency range, receive frequency range decay and be 30dB.
Transceiver 210 and launch after the parameter of SAW (Surface Acoustic Wave) filter 220 determines, can determine the parameter of power amplifier 230.Power amplifier 230 is 24dB at the transmit frequency band gain amplifier of each frequency range, and in receiving belt, gain amplifier is 18dB, and it is-151dBm/Hz that total output receives band noise.
Frequency division duplex device 240 is 0.5dB at the insertion loss of frequency range 1,4,5,8, is 1dB at the insertion loss of frequency range 2, is 20dB in each frequency range to receiving the noise attentuation of frequency range, and exporting and receiving band noise is-173.5dBm/Hz.
The insertion loss of multiplex operation switch 270 is: high frequency 0.8dB, low frequency 0.5dB.
The insertion loss of transmission line is: high frequency 0.7dB, low frequency 0.5dB.
Like this, the insertion loss of the frequency division duplex device 240 of corresponding frequency band 2,8 is reduced to 1dB from 2.5dB, saves the electric current of 70mA, significantly reduces the caloric value of mobile terminal.The insertion loss of the frequency division duplex device 240 of other frequency range corresponding is reduced to 0.5dB from 1.5dB, saves the electric current of 50 milliamperes equally, significantly reduces the caloric value of mobile terminal.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. a frequency division duplex device, it is characterized in that, comprise: receiving path and transmitting path, described transmitting path adopts low pass filter, described low pass filter is capacitor and inductor filter, described capacitor and inductor filter comprises five groups of LC ∏ type filter circuits, described LC ∏ type filter circuit comprises the first electric capacity, inductance and the second electric capacity, described first electric capacity one end earth terminal, the other end is connected with inductance one end, the other end of inductance is connected with one end of the second electric capacity, the other end earth terminal of the second electric capacity, and first group of LC ∏ type filter circuit and second group of LC ∏ type filter circuit share the second electric capacity of first group of LC ∏ type filter circuit, second group of LC ∏ type filter circuit and the 3rd group of LC ∏ type filter circuit share the second electric capacity of second group of LC ∏ type filter circuit, the like, the value of the first electric capacity of the LC ∏ type filter circuit of first group is 4.2pF, the value of inductance is 4.1nH, the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of second group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 3rd group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 4th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 5th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 6th group is 5.1nH, and the value of the second electric capacity is 3.3pF.
2. a mobile terminal, is characterized in that, comprising: transceiver, transmitting SAW (Surface Acoustic Wave) filter, power amplifier, frequency division duplex device and antenna;
Transceiver, for receiving or sending signal, one end is connected with the input of described transmitting SAW (Surface Acoustic Wave) filter, and the other end is connected with the receiving terminal of described frequency division duplex device;
Launch SAW (Surface Acoustic Wave) filter, for select transmit frequency, output is connected with the input of described power amplifier;
Power amplifier, output is connected with the transmitting terminal of described frequency division duplex device;
Frequency division duplex device, comprise receiving path and transmitting path, described transmitting path adopts low pass filter, external connection end is connected with described antenna, wherein, described low pass filter is capacitor and inductor filter, described capacitor and inductor filter comprises many group LC ∏ type filter circuits, described LC ∏ type filter circuit comprises the first electric capacity, inductance and the second electric capacity, described first electric capacity one end earth terminal, the other end is connected with one end of inductance, the other end of inductance is connected with one end of the second electric capacity, the other end earth terminal of the second electric capacity, and first group of LC ∏ type filter circuit and second group of LC ∏ type filter circuit share the second electric capacity of first group of LC ∏ type filter circuit, second group of LC ∏ type filter circuit and the 3rd group of LC ∏ type filter circuit share the second electric capacity of second group of LC ∏ type filter circuit, the like, the value of the first electric capacity of the LC ∏ type filter circuit of first group is 4.2pF, the value of inductance is 4.1nH, the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of second group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 3rd group is 6.2nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 4th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 5th group is 5.6nH, and the value of the second electric capacity is 4.3pF, the value of the inductance of the LC ∏ type filter circuit of the 6th group is 5.1nH, and the value of the second electric capacity is 3.3pF.
3. mobile terminal according to claim 2, is characterized in that, described terminal also comprises: matching network device, and for realizing the impedance matching between transceiver and antenna, one end is connected with the output of frequency division duplex device, and the other end is connected with antenna.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376650.2A CN102420686B (en) | 2011-11-23 | 2011-11-23 | A kind of frequency division duplex device and mobile terminal |
| PCT/CN2012/081420 WO2013075539A1 (en) | 2011-11-23 | 2012-09-14 | Frequency division duplexer and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376650.2A CN102420686B (en) | 2011-11-23 | 2011-11-23 | A kind of frequency division duplex device and mobile terminal |
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| CN102420686A CN102420686A (en) | 2012-04-18 |
| CN102420686B true CN102420686B (en) | 2015-07-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420686B (en) * | 2011-11-23 | 2015-07-29 | 惠州Tcl移动通信有限公司 | A kind of frequency division duplex device and mobile terminal |
| US9692392B2 (en) * | 2012-09-11 | 2017-06-27 | Qualcomm Incorporated | Filters for multi-band wireless device |
| CN106100652B (en) * | 2016-05-31 | 2018-11-27 | 广东欧珀移动通信有限公司 | Mixed-dispel suppression device and method |
| CN106452471B (en) * | 2016-09-29 | 2019-10-11 | 宇龙计算机通信科技(深圳)有限公司 | A kind of GSM radio circuit and the terminal including the circuit |
| CN107104685B (en) | 2017-05-27 | 2020-11-13 | 惠州Tcl移动通信有限公司 | Mobile terminal for expanding LTE B41 frequency band bandwidth and method thereof |
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| EP1365509A1 (en) * | 2002-05-16 | 2003-11-26 | TDK Corporation | Antenna duplexer |
| WO2010053776A1 (en) * | 2008-10-29 | 2010-05-14 | Qualcomm Incorporated | Interface for wireless communication devices |
| CN101835250A (en) * | 2010-04-30 | 2010-09-15 | 华为终端有限公司 | Device and method for reducing power consumption of terminal |
| CN102100006A (en) * | 2008-04-11 | 2011-06-15 | 日本电波工业株式会社 | Duplexer |
| CN102165701A (en) * | 2008-09-24 | 2011-08-24 | 北方电讯网络有限公司 | Duplexer/multiplexer having filters that include at least one band reject filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100544199C (en) * | 2005-01-11 | 2009-09-23 | 台达电子工业股份有限公司 | The filter element of tool balance/unbalance switching function |
| CN102420686B (en) * | 2011-11-23 | 2015-07-29 | 惠州Tcl移动通信有限公司 | A kind of frequency division duplex device and mobile terminal |
-
2011
- 2011-11-23 CN CN201110376650.2A patent/CN102420686B/en not_active Expired - Fee Related
-
2012
- 2012-09-14 WO PCT/CN2012/081420 patent/WO2013075539A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1365509A1 (en) * | 2002-05-16 | 2003-11-26 | TDK Corporation | Antenna duplexer |
| CN102100006A (en) * | 2008-04-11 | 2011-06-15 | 日本电波工业株式会社 | Duplexer |
| CN102165701A (en) * | 2008-09-24 | 2011-08-24 | 北方电讯网络有限公司 | Duplexer/multiplexer having filters that include at least one band reject filter |
| WO2010053776A1 (en) * | 2008-10-29 | 2010-05-14 | Qualcomm Incorporated | Interface for wireless communication devices |
| CN101835250A (en) * | 2010-04-30 | 2010-09-15 | 华为终端有限公司 | Device and method for reducing power consumption of terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013075539A1 (en) | 2013-05-30 |
| CN102420686A (en) | 2012-04-18 |
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