CN207339802U - LC filter circuits and wireless device - Google Patents
LC filter circuits and wireless device Download PDFInfo
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- CN207339802U CN207339802U CN201721164028.4U CN201721164028U CN207339802U CN 207339802 U CN207339802 U CN 207339802U CN 201721164028 U CN201721164028 U CN 201721164028U CN 207339802 U CN207339802 U CN 207339802U
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Abstract
The utility model provides a kind of LC filter circuits and wireless device, wherein the LC filter circuits include：First capacitance, the second capacitance, the 3rd capacitance and inductance；First transmission end of first capacitance and the second transmission end of second capacitance are connected in series；The 3rd transmission end and the 4th transmission end of the 3rd capacitance of the inductance are connected in series；5th transmission end of the inductance is connected in series with the first transmission end of first capacitance and the second transmission end of second capacitance respectively；The 6th transmission end ground connection of 3rd capacitance.The utility model aim is to provide that a kind of cost is low, Insertion Loss is relatively low, and has under high and low temperature environment and suppress jamming performance well, so as to eliminate in 5G radiofrequency signals 2.4G radiofrequency signals well to the LC filter circuits of its interference carried out.
Description
Technical field
Frequency interferences processing technology field is the utility model is related to, more particularly to a kind of LC filter circuits and wireless device.
Background technology
At present, Wi-Fi (Wireless Fidelity, the nothing of transmission 2.4G radiofrequency signals and 5G radiofrequency signals are provided simultaneously with
Line LAN) equipment is more and more, but when 2.4G radiofrequency signals and 5G radiofrequency signals work at the same time, between two frequency ranges easily
Generation interferes with each other.Existing most of Wi-Fi equipments solve this interference problem typically by increase wave filter.For example,
For in order to eliminate interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals, in the RF (Radio of 5G radiofrequency signals
Frequency, radio frequency) increase LTCC (Low Temperature Co-fired Ceramic, low-temperature co-fired ceramics) on link
Wave filter suppresses the interference of 2.4G radiofrequency signals, but LTCC wave filters have the problem of cost is higher, and uses the filtering
During device, for the corresponding Insertion Loss of 5G radiofrequency signals between 1.5~2dB, Insertion Loss is higher.
Utility model content
The technical problems to be solved in the utility model is to overcome in the prior art using LTCC wave filters to 5G radio frequencies
The interference of 2.4G radiofrequency signals is suppressed in signal, there are the defects of cost is higher, Insertion Loss is higher, and it is an object of the present invention to provide it is a kind of into
This is low, Insertion Loss is relatively low, and has under high and low temperature environment and suppress jamming performance well, so as to eliminate 5G radio frequencies well
LC filter circuit and wireless device of the 2.4G radiofrequency signals to its interference carried out in signal.
The utility model is to solve above-mentioned technical problem by following technical proposals：
The utility model provides a kind of LC filter circuits, and the LC filter circuits include：First capacitance, the second capacitance,
3rd capacitance and inductance；
First transmission end of first capacitance and the second transmission end of second capacitance are connected in series；
The 3rd transmission end and the 4th transmission end of the 3rd capacitance of the inductance are connected in series；
5th transmission end of the inductance respectively with the first transmission end of first capacitance and second capacitance
Two transmission end are connected in series；The 6th transmission end ground connection of 3rd capacitance.
It is preferred that the capacitance value range of first capacitance is 0.8~1.2pF.
It is preferred that the capacitance value of first capacitance is 1.0pF.
It is preferred that the capacitance value range of second capacitance is 0.8~1.2pF.
It is preferred that the capacitance value of second capacitance is 1.0pF.
It is preferred that the capacitance value range of the 3rd capacitance is 1~3pF；The inductance numeric area of the inductance for 1~
3nH.Wherein, the capacitance value of the 3rd capacitance is adapted definite according to the value of the inductance.
It is preferred that the capacitance value of the 3rd capacitance is 1.8pF, the inductance value of the inductance is 2nH.
It is preferred that the LC filter circuits are the filter circuit being connected in series in 5G radio frequency links；
The LC filter circuits further include the first connecting pin and second connection end, and the LC filter circuits are respectively via described
First connecting pin and the second connection end are connected in series in 5G radio frequency links；
7th transmission end of first capacitance is connected in series with first connecting pin, and the 8th of second capacitance passes
Defeated end is connected in series with the second connection end.
The utility model additionally provides a kind of wireless device, and the wireless device includes 2.4G radio frequency links, 5G rf chains
Road and the LC filter circuits；
The LC filter circuits are connected in series in 5G radio frequency links.The LC filter circuits are penetrated for eliminating the 2.4G
The interference that the corresponding 2.4G radiofrequency signals of frequency link produce the 5G radiofrequency signals of the 5G radio frequency links.
The positive effect of the utility model is：
The LC filter circuits of the utility model are the filter circuits being made up of inductance and capacitance, eliminate 5G radiofrequency signals
The interference that middle 2.4G radiofrequency signals carry out it, while cost is low and Insertion Loss is relatively low, wherein, Insertion Loss can be realized less than 1dB, had
Improve to effect the ability that existing LTCC wave filters suppress interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals.
Brief description of the drawings
Fig. 1 is the circuit diagram of the LC filter circuits of the embodiment 1 of the utility model；
Fig. 2 is first experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of -40 DEG C of low temperature
Figure；
Fig. 3 is second experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of -40 DEG C of low temperature
Figure；
Fig. 4 is first experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of -20 DEG C of low temperature
Figure；
Fig. 5 is second experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of -20 DEG C of low temperature
Figure；
Fig. 6 is first experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 0 DEG C of low temperature
Figure；
Fig. 7 is second experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 0 DEG C of low temperature
Figure；
Fig. 8 is first experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 20 DEG C of high temperature
Figure；
Fig. 9 is second experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 20 DEG C of high temperature
Figure；
Figure 10 is first experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 40 DEG C of high temperature
Figure；
Figure 11 is second experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 40 DEG C of high temperature
Figure；
Figure 12 is first experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 60 DEG C of high temperature
Figure；
Figure 13 is second experimental data of the LC filter circuits of the embodiment 1 of the utility model in the environment of 60 DEG C of high temperature
Figure；
Figure 14 is the structure diagram of the wireless device of the embodiment 2 of the utility model.
Embodiment
Name preferred embodiment, and become apparent from intactly illustrating the utility model with reference to attached drawing.
Embodiment 1
As shown in Figure 1, the utility model provides a kind of LC filter circuits 1.The LC filter circuits 1 include：First electricity
Hold C1, the second capacitance C2, the 3rd capacitance C3, inductance L1, the first connecting pin a1 and second connection end a2.
The second transmission end f1 of the first transmission end b2 of the first capacitance C1 and the second capacitance C2 are connected in series.Institute
The 4th transmission e1 ends for stating the 3rd transmission end d1 and the 3rd capacitance C3 of inductance L1 are connected in series；The 5th of the inductance L1
Second transmission end f1s of the transmission end d2 respectively with the first transmission end b2 and the second capacitance C2 of the first capacitance C1 connects
Connection.The 6th transmission end e2 ground connection of the 3rd capacitance C3.
The LC filter circuits 1 are the filter circuit 1 being connected in series in 5G radio frequency links.The LC filter circuits 1 divide
It is not connected in series in via the first connecting pin a1 and the second connection end a2 in 5G radio frequency links.The first capacitance C1
The 7th transmission end b2 and the first connecting pin a1 be connected in series, the 8th transmission end f2 of the second capacitance C2 and described the
Two connecting pin a2 are connected in series.
Wherein, the capacitance value range of first capacitance is 0.8~1.2pF.It is preferred that the capacitance of first capacitance
Value is 1.0pF.
Wherein, the capacitance value range of second capacitance is 0.8~1.2pF.It is preferred that the capacitance of second capacitance
Value is 1.0pF.
Wherein, the capacitance value range of the 3rd capacitance is 1~3pF；The inductance numeric area of the inductance for 1~
3nH.The capacitance value of 3rd capacitance is adapted definite according to the value of the inductance.It is preferred that the 3rd capacitance
Capacitance value is 1.8pF, and the inductance value of the inductance is 2nH.
The operation principle of the LC filter circuits 1 is：
Since inductance and capacitance belong to passive device, so the first connecting pin a1 of the LC filter circuits 1 is signal
Input terminal, second connection end a2 are signal output part；Or, second connection end a2 is signal input part, the first connecting pin a1 is letter
Number output terminal.
The 4th transmission e1 ends of the 3rd transmission end d1 of the inductance L1 and the 3rd capacitance C3 are connected in series, it is described
The 5th transmission end d2 of inductance L1 respectively with the first transmission end b2 and the second capacitance C2 of the first capacitance C1 second
Transmission end f1 is connected in series, and the 6th transmission end e2 of the 3rd capacitance C3 is grounded, and is realized to from the 3rd of the inductance L1
The signal of transmission end d1 inputs plays the role of trap.It will suppress signal frequency herein and be transferred to 2.45G or so, realize and eliminate 5G radio frequencies
Interference of the 2.4G radiofrequency signals to it in signal.Meanwhile by the first transmission end b2 of the first capacitance C1 and it is described second electricity
The the second transmission end f1 for holding C2 is connected in series so that the high-frequency signal 5G radiofrequency signals of input can be normal through, and low frequency signal
2.4G radiofrequency signals can not be by playing the role of high-pass filtering, 5G radio frequencies letter being eliminated so as to fulfill the LC filter circuits 1
Interference of the 2.4G radiofrequency signals to it in number, while ensure 5G radiofrequency signal energy normal transmissions.
Meanwhile the suppression of interference of the 2.4G radiofrequency signals to it is done in the elimination 5G radiofrequency signals of the LC filter circuits 1
Immunity that is, under the application environment of different high and low temperatures, can ensure a suppression of jamming performance from the influence of high and low temperature
Stabilization.
Illustrated with reference to Fig. 2~13, Fig. 2~7 are -40 DEG C of low temperature, the experimental data under -20 DEG C and 0 DEG C of environment
Figure；Fig. 8~13 are the experimental data figure under 20 DEG C, 40 DEG C and 60 DEG C environment of high temperature.Wherein, LC filter circuits described in test object
The capacitance value of 1 the first capacitance C1 is 1.0pF, the capacitance value of the second capacitance C2 is 1.0pF, the capacitance of the 3rd capacitance C3 takes
It is 2nH to be worth for the inductance value of 1.8pF, inductance.
Transverse axis in Fig. 2~13 represents the frequency (i.e. 2.4G and 5G) of input signal, and the longitudinal axis represents the LC filtering
Insertion Loss of the circuit 1 to input signal.Wherein, Insertion Loss, that is, insertion loss, refers to some devices or branch circuit (wave filter, resistance
Anti- adaptation when) add a certain circuit when, the loss of energy or gain.
As shown in Figures 2 and 3, the experimental data figure for the LC filter circuits 1 in the environment of -40 DEG C of low temperature.
As shown in Fig. 2, inputted for input signal from the first connecting pin a1 of the LC filter circuits 1, from second connection end
A2 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -23.60dB)；2nd, (2.442GHz, -24.19dB)；
3rd, (2.472GHz, -26.71dB)；4th, (5.180GHz, -0.02dB)；5th, (5.210GHz, -0.39dB)；6th, (5.320GHz ,-
0.05dB)；7th, (5.500GHz, -0.43dB)；8th, (5.700GHz, -0.30dB)；9th, (5.745GHz, -0.19dB)；10、
(5.825GHz, -0.22dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 23.60~26.71dB, be far longer than 1dB, it is achieved that low
In the environment of -40 DEG C of temperature, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be just
Often transmission.
As shown in figure 3, inputted for input signal from the second connection end a2 of the LC filter circuits 1, from the first connecting pin
A1 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -24.11dB)；2nd, (2.442GHz, -24.70dB)；
3rd, (2.472GHz, -27.26dB)；4th, (5.180GHz, -0.20dB)；5th, (5.210GHz, -0.18dB)；6th, (5.320GHz ,-
0.18dB)；7th, (5.500GHz, -0.22dB)；8th, (5.700GHz, -0.25dB)；9th, (5.745GHz, -0.14dB)；10、
(5.825GHz, -0.21dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.11~27.26dB, be far longer than 1dB, it is achieved that low
In the environment of -40 DEG C of temperature, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be just
Often transmission.
As shown in Figure 4 and Figure 5, the experimental data figure for the LC filter circuits 1 in the environment of -20 DEG C of low temperature.
As shown in figure 4, inputted for input signal from the first connecting pin a1 of the LC filter circuits 1, from second connection end
A2 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -23.78dB)；2nd, (2.442GHz, -24.56dB)；
3rd, (2.472GHz, -26.88dB)；4th, (5.180GHz, -0.14dB)；5th, (5.210GHz, -0.48dB)；6th, (5.320GHz ,-
0.16dB)；7th, (5.500GHz, -0.53dB)；8th, (5.700GHz, -0.41dB)；9th, (5.745GHz, -0.33dB)；10、
(5.825GHz, -0.33dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 23.78~26.88dB, be far longer than 1dB, it is achieved that low
In the environment of -20 DEG C of temperature, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be just
Often transmission.
As shown in figure 5, inputted for input signal from the second connection end a2 of the LC filter circuits 1, from the first connecting pin
A1 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -24.18dB)；2nd, (2.442GHz, -24.91dB)；
3rd, (2.472GHz, -27.47dB)；4th, (5.180GHz, -0.33dB)；5th, (5.210GHz, -0.29dB)；6th, (5.320GHz ,-
0.36dB)；7th, (5.500GHz, -0.38dB)；8th, (5.700GHz, -0.20dB)；9th, (5.745GHz, -0.33dB)；10、
(5.825GHz, -0.32dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.18~27.47dB, be far longer than 1dB, it is achieved that low
In the environment of -20 DEG C of temperature, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be just
Often transmission.
As shown in Figure 6 and Figure 7, the experimental data figure for the LC filter circuits 1 in the environment of 0 DEG C of low temperature.
As shown in fig. 6, inputted for input signal from the first connecting pin a1 of the LC filter circuits 1, from second connection end
A2 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -23.94dB)；2nd, (2.442GHz, -24.54dB)；
3rd, (2.472GHz, -27.02dB)；4th, (5.180GHz, -0.22dB)；5th, (5.210GHz, -0.55dB)；6th, (5.320GHz ,-
0.23dB)；7th, (5.500GHz, -0.62dB)；8th, (5.700GHz, -0.51dB)；9th, (5.745GHz, -0.43dB)；10、
(5.825GHz, -0.44dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 23.94~27.02dB, be far longer than 1dB, it is achieved that in low temperature
In the environment of 0 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be passed normally
It is defeated.
As shown in fig. 7, inputted for input signal from the second connection end a2 of the LC filter circuits 1, from the first connecting pin
A1 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -24.36dB)；2nd, (2.442GHz, -25.10dB)；
3rd, (2.472GHz, -27.55dB)；4th, (5.180GHz, -0.42dB)；5th, (5.210GHz, -0.38dB)；6th, (5.320GHz ,-
0.38dB)；7th, (5.500GHz, -0.48dB)；8th, (5.700GHz, -0.50dB)；9th, (5.745GHz, -0.36dB)；10、
(5.825GHz, -0.44dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.36~27.55dB, be far longer than 1dB, it is achieved that in low temperature
In the environment of 0 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be passed normally
It is defeated.
As shown in Figure 8 and Figure 9, the experimental data figure for the LC filter circuits 1 in the environment of 20 DEG C of high temperature.
As shown in figure 8, inputted for input signal from the first connecting pin a1 of the LC filter circuits 1, from second connection end
A2 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -24.17dB)；2nd, (2.442GHz, -24.74dB)；
3rd, (2.472GHz, -27.29dB)；4th, (5.180GHz, -0.28dB)；5th, (5.210GHz, -0.00dB)；6th, (5.320GHz ,-
0.31dB)；7th, (5.500GHz, -0.67dB)；8th, (5.700GHz, -0.56dB)；9th, (5.745GHz, -0.47dB)；10、
(5.825GHz, -0.49dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.17~27.29dB, be far longer than 1dB, it is achieved that in high temperature
In the environment of 20 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be normal
Transmission.
As shown in figure 9, inputted for input signal from the second connection end a2 of the LC filter circuits 1, from the first connecting pin
A1 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -24.48dB)；2nd, (2.442GHz, -25.20dB)；
3rd, (2.472GHz, -27.71dB)；4th, (5.180GHz, -0.46dB)；5th, (5.210GHz, -0.42dB)；6th, (5.320GHz ,-
0.55dB)；7th, (5.500GHz, -0.55dB)；8th, (5.700GHz, -0.50dB)；9th, (5.745GHz, -0.30dB)；10、
(5.825GHz, -0.52dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.48~27.71dB, be far longer than 1dB, it is achieved that in high temperature
In the environment of 20 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be normal
Transmission.
As shown in Figure 10 and Figure 11, the experimental data figure for the LC filter circuits 1 in the environment of 40 DEG C of high temperature.
As shown in Figure 10, inputted for input signal from the first connecting pin a1 of the LC filter circuits 1, from second connection end
A2 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -24.45dB)；2nd, (2.442GHz, -24.95dB)；
3rd, (2.472GHz, -27.40dB)；4th, (5.180GHz, -0.07dB)；5th, (5.210GHz, -0.03dB)；6th, (5.320GHz ,-
0.38dB)；7th, (5.500GHz, -0.72dB)；8th, (5.700GHz, -0.62dB)；9th, (5.745GHz, -0.56dB)；10、
(5.825GHz, -0.55dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.45~27.40dB, be far longer than 1dB, it is achieved that in high temperature
In the environment of 40 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be normal
Transmission.
As shown in figure 11, inputted for input signal from the second connection end a2 of the LC filter circuits 1, from the first connecting pin
A1 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.412GHz, -24.52dB)；2nd, (2.442GHz, -25.38dB)；
3rd, (2.472GHz, -27.04dB)；4th, (5.180GHz, -0.55dB)；5th, (5.210GHz, -0.49dB)；6th, (5.320GHz ,-
0.40dB)；7th, (5.500GHz, -0.65dB)；8th, (5.700GHz, -0.64dB)；9th, (5.745GHz, -0.42dB)；10、
(5.825GHz, -0.62dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.52~27.04dB, be far longer than 1dB, it is achieved that in high temperature
In the environment of 40 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be normal
Transmission.
As shown in Figure 12 and Figure 13, the experimental data figure for the LC filter circuits 1 in the environment of 60 DEG C of high temperature.
As shown in figure 12, inputted for input signal from the first connecting pin a1 of the LC filter circuits 1, from second connection end
A2 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.442GHz, -25.15dB)；2nd, (2.472GHz, -27.57dB)；
3rd, (2.572GHz, -32.59dB)；4th, (5.180GHz, -0.42dB)；5th, (5.210GHz, -0.65dB)；6th, (5.320GHz ,-
0.42dB)；7th, (5.500GHz, -0.74dB)；8th, (5.700GHz, -0.64dB)；9th, (5.745GHz, -0.60dB)；10、
(5.825GHz, -0.58dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 25.15~32.59dB, be far longer than 1dB, it is achieved that in high temperature
In the environment of 60 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be normal
Transmission.
As shown in figure 13, inputted for input signal from the second connection end a2 of the LC filter circuits 1, from the first connecting pin
A1 is exported.
Take in experimental data figure on curve 10 point datas (including the corresponding frequency input signal of 10 point datas and
Insertion Loss) illustrate, which is respectively：1st, (2.442GHz, -24.66dB)；2nd, (2.472GHz, -25.57dB)；
3rd, (2.572GHz, -27.99dB)；4th, (5.180GHz, -0.62dB)；5th, (5.210GHz, -0.53dB)；6th, (5.320GHz ,-
0.51dB)；7th, (5.500GHz, -0.74dB)；8th, (5.700GHz, -0.70dB)；9th, (5.745GHz, -0.45dB)；10、
(5.825GHz, -0.71dB).By 10 point datas it is known that the LC filter circuits 1 for 5G frequency signals Insertion Loss
Less than 1dB, and for 2.4G frequency signals Insertion Loss in 24.66~27.99dB, be far longer than 1dB, it is achieved that in high temperature
In the environment of 60 DEG C, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals is eliminated, so as to ensure that 5G radiofrequency signals can be normal
Transmission.
Therefore, in 2.4G radiofrequency signals and 5G radiofrequency signals and the Wi-Fi products deposited, using the LC filter circuits
1, interference of the 2.4G radiofrequency signals to it in 5G radiofrequency signals can be eliminated, so as to ensure 5G radiofrequency signal energy normal transmissions, is inserted
Damage is less than 1dB, and suppression of the 2.4G radiofrequency signals in 5G radiofrequency signals to it is imitated better than LTCC wave filters are used in the prior art
Fruit, and under high and low temperature environment, suppress jamming performance and meet AF panel requirement always.
Embodiment 2
As shown in figure 14, the utility model additionally provides a kind of wireless device 2, and the wireless device 2 includes 2.4G radio frequencies
Link 21,5G radio frequency links 22 and the LC filter circuits 1.
The operation principle of the wireless device 2 is：
The LC filter circuits are connected in series in 5G radio frequency links 22, corresponding for eliminating the 2.4G radio frequency links
The interference that 2.4G radiofrequency signals produce the 5G radiofrequency signals of the 5G radio frequency links.
Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
Member can make these embodiments numerous variations or repair on the premise of the principle and essence without departing substantially from the utility model
Change, but these change and modification each fall within the scope of protection of the utility model.
Claims (9)
1. a kind of LC filter circuits, it is characterised in that the LC filter circuits include：First capacitance, the second capacitance, the 3rd capacitance
And inductance；
First transmission end of first capacitance and the second transmission end of second capacitance are connected in series；
The 3rd transmission end and the 4th transmission end of the 3rd capacitance of the inductance are connected in series；
5th transmission end of the inductance is passed with the first transmission end of first capacitance and the second of second capacitance respectively
Defeated end is connected in series；The 6th transmission end ground connection of 3rd capacitance.
2. LC filter circuits as claimed in claim 1, it is characterised in that the capacitance value range of first capacitance is 0.8
~1.2pF.
3. LC filter circuits as claimed in claim 2, it is characterised in that the capacitance value of first capacitance is 1.0pF.
4. LC filter circuits as claimed in claim 1, it is characterised in that the capacitance value range of second capacitance is 0.8
~1.2pF.
5. LC filter circuits as claimed in claim 4, it is characterised in that the capacitance value of second capacitance is 1.0pF.
6. LC filter circuits as claimed in claim 1, it is characterised in that the capacitance value range of the 3rd capacitance for 1~
3pF；The inductance numeric area of the inductance is 1~3nH.
7. LC filter circuits as claimed in claim 6, it is characterised in that the capacitance value of the 3rd capacitance is 1.8pF, institute
The inductance value for stating inductance is 2nH.
8. LC filter circuits as claimed in claim 1, it is characterised in that the LC filter circuits are to be connected in series in 5G radio frequencies
Filter circuit in link；
The LC filter circuits further include the first connecting pin and second connection end, and the LC filter circuits are respectively via described first
Connecting pin and the second connection end are connected in series in 5G radio frequency links；
7th transmission end of first capacitance is connected in series with first connecting pin, the 8th transmission end of second capacitance
It is connected in series with the second connection end.
9. a kind of wireless device, it is characterised in that the wireless device will including 2.4G radio frequency links, 5G radio frequency links and right
Seek the LC filter circuits described in any one of 1-8；
The LC filter circuits are connected in series in 5G radio frequency links.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721164028.4U CN207339802U (en) | 2017-09-12 | 2017-09-12 | LC filter circuits and wireless device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721164028.4U CN207339802U (en) | 2017-09-12 | 2017-09-12 | LC filter circuits and wireless device |
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| Publication Number | Publication Date |
|---|---|
| CN207339802U true CN207339802U (en) | 2018-05-08 |
Family
ID=62368792
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|---|---|---|---|
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|---|---|
| CN (1) | CN207339802U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112313928A (en) * | 2018-06-29 | 2021-02-02 | 华为技术有限公司 | USB seat operation circuit and terminal |
-
2017
- 2017-09-12 CN CN201721164028.4U patent/CN207339802U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112313928A (en) * | 2018-06-29 | 2021-02-02 | 华为技术有限公司 | USB seat operation circuit and terminal |
| CN112313928B (en) * | 2018-06-29 | 2024-04-05 | 荣耀终端有限公司 | USB seat operation circuit and terminal |
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Effective date of registration: 20200331 Address after: 201100 floor 5, building 8, No. 2388, Chenhang Road, Minhang District, Shanghai Patentee after: CIG SHANGHAI Co.,Ltd. Address before: 201114 room 8, building 2388, 501 Chen Cheng Road, Shanghai, Minhang District Co-patentee before: ZHEJIANG JIANQIAO ELECTRONIC TECHNOLOGY Co.,Ltd. Patentee before: CIG SHANGHAI Co.,Ltd. |