CN106160689B - Wireless communication device and its filter - Google Patents
Wireless communication device and its filter Download PDFInfo
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- CN106160689B CN106160689B CN201510176781.4A CN201510176781A CN106160689B CN 106160689 B CN106160689 B CN 106160689B CN 201510176781 A CN201510176781 A CN 201510176781A CN 106160689 B CN106160689 B CN 106160689B
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Abstract
A kind of wireless communication device and its filter.The filter has input terminal and output end, and includes the first energy-storage travelling wave tube, first and second series resonant circuit and first and second antiresonant circuit.First and second series resonant circuit includes respectively the first capacitance and the first inductance being serially connected.First and second antiresonant circuit includes respectively the second capacitance and the second inductance parallel with one another.First series resonant circuit and the first antiresonant circuit are repeatedly connected between the first end and ground terminal of the first energy-storage travelling wave tube, and the second series resonant circuit and the second antiresonant circuit are repeatedly connected between the second end and ground terminal of the first energy-storage travelling wave tube.
Description
Technical field
The present invention relates to a kind of wireless communication devices and its filter, and more particularly to a kind of with the operation of parallel Double RF
Wireless communication device and its filter.
Background technology
In recent years, the radio area network for meeting IEEE 802.11ac communication standards utilizes parallel Double RF technology
(Concurrent Dual-Radio Technology) increases the connection number of user.Wherein, IEEE 802.11ac are communicated
Standard, which can be used, exempts from license National information infrastructure NII (Unlicensed National Information
Infrastructure, abbreviation UNII) frequency band communicated.Under the operation of parallel Double RF, two in wireless communication device
Transceiver can be operated simultaneously in neighbouring UNII-1 (5.17~5.25GHz) frequency bands and UNII-3 (5.735~5.815GHz) frequencies
Band.In addition, the interfering with each other between above-mentioned two frequency band in order to avoid wireless communication device, tool must be arranged in wireless communication device
There is the filter of precipitous filter curve and high-isolation (high isolation).
In general, film block resonance filter (thin-film bulk acoustic resonator, referred to as
FBAR it) often is used to be designed to have with dielectric resonance filter (dielectric resonator filter, abbreviation DRF)
Precipitous filter curve or high isolation filter.However, above-mentioned filter must be made of special process, therefore price
It is expensive and there is larger area.In addition to this, the prior art is improved by the exponent number (order) for improving filter mostly
The attenuation of filter.However, the raising of the exponent number with filter, it will increase the size of filter, and can cause to filter
Utensil has the insertion loss of bigger and poor amplitude flatness.In other words, existing filter often increases wireless communication dress
The generation production cost set, and limit the micromation of wireless communication device.
Invention content
The present invention provides a kind of wireless communication device and its filter, and repeatedly series resonance is connect respectively at the both ends of energy-storage travelling wave tube
Circuit and antiresonant circuit, with thereby shaping filter.Thus, which filter will be helpful to reduce wireless communication device
Production cost, and contribute to the micromation of wireless communication device.
The filter of the present invention has input terminal and output end, and includes that the first energy-storage travelling wave tube, first and second series connection are humorous
It shakes circuit and first and second antiresonant circuit.First and second series resonant circuit includes respectively first be serially connected
Capacitance and the first inductance.First and second antiresonant circuit respectively include the second capacitance and the second inductance parallel with one another, and
First series resonant circuit and the first antiresonant circuit are repeatedly connected between the first end and ground terminal of the first energy-storage travelling wave tube, with shape
At the filter with passband and stopband.
The wireless communication device of the present invention, including first transceiver, second transceiver, first filter and the second filtering
Device.First transceiver is electrically connected first antenna by least one first signal end.Second transceiver passes through at least one second letter
Number end be electrically connected the second antenna.First filter includes the first passband and the first stopband, and is arranged described at least one first
Between signal end and first antenna.Second filter includes the second passband and the second stopband, and is arranged described at least one second
Between signal end and the second antenna.First passband is identical as the second stopband, and the first stopband is identical as the second passband.First filtering
Device respectively has input terminal and output end with second filter, and respectively humorous including the first energy-storage travelling wave tube, first and second series connection
It shakes circuit and first and second antiresonant circuit.First and second series resonant circuit includes respectively first be serially connected
Capacitance and the first inductance.First and second antiresonant circuit includes respectively the second capacitance and the second inductance parallel with one another.The
One series resonant circuit and the first antiresonant circuit are repeatedly connected between the first end and ground terminal of the first energy-storage travelling wave tube.Second string
Connection resonance circuit and the second antiresonant circuit are repeatedly connected between the second end and ground terminal of the first energy-storage travelling wave tube.
Based on above-mentioned, it is in parallel with first humorous that the present invention in the first end of the first energy-storage travelling wave tube repeatedly connects the first series resonant circuit
Shake circuit, and repeatedly connects the second series resonant circuit and the second antiresonant circuit in the second end of the first energy-storage travelling wave tube, with thereby
Shaping filter.Thus, which filter will be helpful to reduce the production cost of wireless communication device, and help to wirelessly communicate
The micromation of device.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to coordinate attached drawing to make
Carefully it is described as follows.
Description of the drawings
Fig. 1 is the circuit diagram of the filter of an embodiment according to the present invention.
Fig. 2 is the schematic diagram of the frequency response of the filter to definition graph 1.
Fig. 3 is the circuit diagram of the filter of another embodiment according to the present invention.
Fig. 4 is the schematic diagram of the frequency response of the filter to definition graph 3.
Fig. 5 is the schematic layout pattern of the filter of an embodiment according to the present invention.
Fig. 6 is the circuit diagram of the filter of another embodiment according to the present invention.
Fig. 7 is the circuit diagram of the filter of another embodiment according to the present invention.
Fig. 8 is the circuit diagram of the filter of another embodiment according to the present invention.
Fig. 9 is the schematic diagram of the frequency response of the filter to definition graph 8.
Figure 10 is the circuit diagram of the filter of another embodiment according to the present invention.
Figure 11 is the schematic diagram of the frequency response of the filter to definition graph 10.
Figure 12 is the block diagram of the wireless communication device of an embodiment according to the present invention.
Figure 13 is the block diagram of the wireless communication device of another embodiment according to the present invention.
【Reference sign】
100、300、600、700、800、1000：Filter
110、310、610、710：Energy-storage travelling wave tube
120、130、320、330、620、720、810、820、1010、1020：Series resonant circuit
140、150、630、730：Antiresonant circuit
C11, C12, C21, C22, C3, C31, C32, C61, C62, C71~C73, C81, C82, C101, C102：Capacitance
L11, L12, L21, L22, L3, L31, L32, L61~L63, L71, L72, L81, L82, L101, L102：Inductance
IN：Input terminal
OUT：Output end
210、410、910、1110：Passband
220、420、920、1120：Stopband
230、430、930、940、1130、1140：Filtered band
P21、P22、P41、P42：Turning point
511~519：Chip type component
520：Substrate
521：Surface
530、540：Conductor wire
550：Conducting surface
1200、1300：Wireless communication device
1211、1212：Transceiver
1221、1222：Power amplifier
1230：First filter
1240：Second filter
1310~1340：Third filter
1251、1252：Switch
1261、1262：Antenna
TX1、TX2：Transmitting terminal
RX1、RX2：Receiving terminal
Specific implementation mode
Fig. 1 is the circuit diagram of the filter of an embodiment according to the present invention.As shown in Figure 1, filter 100 is with defeated
Enter to hold IN and output end OUT, and filter 100 includes energy-storage travelling wave tube 110, series resonant circuit 120 and 130 and parallel resonance
Circuit 140 and 150.Wherein, energy-storage travelling wave tube 110 is electrically connected between input terminal IN and output end OUT.Series resonant circuit
120 and 130 include respectively the capacitance and an inductance being serially connected.For example, series resonant circuit 120 includes the electricity being serially connected
Hold C11 and inductance L11, and series resonant circuit 130 includes the capacitance C12 and inductance L12 being serially connected.
Antiresonant circuit 140 and 150 includes respectively a capacitance and an inductance parallel with one another.For example, parallel resonance is electric
Road 140 includes capacitance C21 parallel with one another and inductance L21, and antiresonant circuit 150 include capacitance C22 parallel with one another with
Inductance L22.Further to seeing, series resonant circuit 120 is repeatedly connected on the first of energy-storage travelling wave tube 110 with antiresonant circuit 140
Between end and ground terminal.Series resonant circuit 130 and antiresonant circuit 150, which change, to be connected on the second end of energy-storage travelling wave tube 110 and connects
Between ground terminal.Thereby, the filter 100 with passband (pass band) Yu stopband (stop band) can be formed.
For example, in Fig. 1 embodiments, energy-storage travelling wave tube 110 can be for example an inductance L3.In addition, the first of inductance L3
End is electrically connected input terminal IN and the capacitance C11 in series resonant circuit 120, and the second end of inductance L3 is electrically connected output end
The OUT and capacitance C12 in series resonant circuit 130.Inductance L11 in series resonant circuit 120 is electrically connected parallel resonance electricity
Capacitance C21 and inductance L21 in road 140.Inductance L12 in series resonant circuit 130 is electrically connected in antiresonant circuit 150
Capacitance C22 and inductance L22.Thereby, energy-storage travelling wave tube 110, series resonant circuit 120 and 130 and resonance circuit 140 and 150
It will can form the 5 rank filters with low pass kenel.
Fig. 2 is the schematic diagram of the frequency response of the filter to definition graph 1.As shown in Fig. 2, the characteristic of filter 100
Curve includes passband 210 and stopband 220.Wherein, the frequency of passband 210 covers 5.17~5.25GHz (also that is, UNII-1 frequencies
Band), and the frequency of stopband 220 covers 5.735~5.815GHz (also that is, UNII-3 frequency bands).In addition, filter 100 is in passband
210 insertion loss (insertion loss) is about 0.7dB, and filter 100 stopband 220 attenuation it is minimum it is reachable-
39dB.In other words, the passband 210 of filter 100 is flat in the extreme, and filter 100 intermediate zone damply quickly.
Therefore, in comparison with existing filter, filter 100 can be caused to have without the exponent number for expanding filter 100
There is good efficiency, to help to reduce the production cost of wireless communication device, and contributes to the miniature of wireless communication device
Change.In addition to this, the characteristic curve of filter 100 includes two turning points P21 and P22.Therefore, filter 100 is in addition to can be with
Position decay other than the signal of stopband 220, can also further decay at filtered band 230 (also that is, 2.412~2.484GHz)
Signal.For example, the minimum reachable -27dB of attenuation of the filter 100 in filtered band 230.
It is noted that in Fig. 1 embodiments, the capacitance of capacitance C11 is equal to the capacitance of capacitance C12, and electricity
The capacitance for holding C21 is equal to the capacitance of capacitance C22.In addition, the capacitance of capacitance C11 is more than the capacitance of capacitance C21.Electricity
The inductance value of sense L11 is equal to the inductance value of inductance L12, and the inductance value of inductance L21 is equal to the inductance value of inductance L22.This
Outside, the inductance value of inductance L3 is more than the inductance value of inductance L11, and the inductance value of inductance L21 is more than the inductance value of inductance L3.This
Outside, those skilled in the art can also adjust the inductance value of the capacitance and each inductance of above-mentioned each capacitance according to design.
Although Fig. 1 lists the type of filter, it is not limited to the present invention.Those skilled in the art are adjustable
The order of connection of the constituent element of energy-storage travelling wave tube 110 and capacitance and inductance in series resonant circuit 120 and 130, with thereby
The filter with high pass kenel is formed by energy-storage travelling wave tube, two series resonant circuits and two antiresonant circuits.
For example, Fig. 3 is the circuit diagram of the filter of another embodiment according to the present invention.In Fig. 3 embodiments,
Energy-storage travelling wave tube 310 can be for example a capacitance C3.In addition, the first end of capacitance C3 is electrically connected input terminal IN and series resonant circuit
Inductance L31 in 320, and the second end of capacitance C3 is electrically connected the inductance L32 of output end OUT and series resonant circuit 330.String
Join the capacitance C21 and inductance L21 that the capacitance C31 in resonance circuit 320 is electrically connected in antiresonant circuit 140, and it is humorous to connect
The capacitance C22 and inductance L22 that the capacitance C32 in circuit 330 that shakes is electrically connected in antiresonant circuit 150.Wherein, capacitance C31,
C32, C21 are identical as the capacitance of C22, and the capacitance of capacitance C3 is less than the capacitance of capacitance C31.The inductance value of inductance L31
It is equal to the inductance value of inductance L32, and the inductance value of inductance L31 is less than the inductance value of inductance L21.Thereby, energy-storage travelling wave tube 310,
Series resonant circuit 320 and 330 and resonance circuit 140 and 150 will can form the 5 rank filters with high pass kenel.
Fig. 4 is the schematic diagram of the frequency response of the filter to definition graph 3.As shown in figure 4, the characteristic of filter 300
Curve includes passband 410 and stopband 420.Wherein, the frequency of passband 410 covers 5.735~5.815GHz (also that is, UNII-3 frequencies
Band), and the frequency of stopband 420 covers 5.17~5.25GHz (also that is, UNII-1 frequency bands).In addition, filter 300 is in passband 410
Insertion loss be about 0.9dB, and filter 300 is in the minimum reachable -41dB of attenuation of stopband 420.Furthermore filter 300
Characteristic curve include two turning points P41 and P42.Therefore, filter 300 in addition to can decay position stopband 420 signal
In addition, can also further decay position filtered band 430 (also that is, 2.412~2.484GHz) signal.For example, filter 300
Minimum reachable-the 47dB of attenuation in filtered band 430.
It is worth noting that, capacitance C11, C12, C21, C22, C3, C31, C32 in above-mentioned filter 100 and 300 and
Inductance L11, L12, L21, L22, L3, L31, L32 can be a chip type component respectively.Also that is, electricity in filter 100 and 300
Holding C11, C12, C21, C22, C3, C31, C32 can be made of a chip capacity (chip capacitor) respectively, and filter
Inductance L11, L12, L21, L22, L3, L31, L32 in 100 and 300 can be respectively by a chip inductance (chip inductor) institutes
It constitutes.In other words, for filter 100 can be combined by chip inductance with chip capacity with 300, therefore filter can effectively be reduced
The size and price of wave device 100 and 300, to contribute to the micromation of wireless communication device and reduce wireless communication device
Production cost.
For example, Fig. 5 is the schematic layout pattern of the filter of an embodiment according to the present invention.As shown in figure 5, chip-shaped
Element 511~519 is arranged on a surface 521 of substrate 520.In addition, chip type component 511~519 can be a chip respectively
Inductance or a chip capacity.For example, chip type component 511 and 514~517 can be a chip inductance respectively, and chip
Type element 512,513,518 and 519 can be a chip capacity respectively, to cause chip type component 511~519 that can be formed such as
Filter shown in FIG. 1 with low pass kenel.In addition, conductor wire 530 and 540 respectively to constitute the input terminal of filter with
Output end, and conducting surface 550 is to the ground terminal as filter.
Fig. 1 and Fig. 3 embodiments are to enumerate the filter 100 and 300 of 5 ranks.However, in another embodiment, ability
The exponent number of filter 100 and 300 also can be extended to 8,11,14,17 ... ranks by field technique personnel according to design.Citing comes
It says, Fig. 6 is the circuit diagram of the filter of another embodiment according to the present invention.Compared to Fig. 1 embodiments, the filter of Fig. 6
600 further include energy-storage travelling wave tube 610, series resonant circuit 620 and antiresonant circuit 630.Wherein, the first of energy-storage travelling wave tube 610
End is electrically connected energy-storage travelling wave tube 110, and the second end of energy-storage travelling wave tube 610 is electrically connected output end OUT.In addition, energy-storage travelling wave tube 610
It can be for example an inductance L63.
Similarly with series resonant circuit 120, series resonant circuit 620 includes capacitance C61 and inductance L61, and capacitance C61
It is sequentially connected between the second end of inductance L63 and antiresonant circuit 630 with inductance L61.It is similar to antiresonant circuit 140
Ground, antiresonant circuit 630 includes inductance L62 and capacitance C62, and inductance L62 and capacitance C62 is connected in parallel on inductance L61 and ground connection
Between end.In addition, series resonant circuit 620 changes with antiresonant circuit 630 is connected on the second end and ground terminal of energy-storage travelling wave tube 610
Between.Thereby, energy-storage travelling wave tube 610, series resonant circuit 620 will can cause the exponent number of filter 600 with antiresonant circuit 630
Extend to 8 ranks.In other words, the filter 600 of Fig. 6 can be for example the 8 rank filters with low pass kenel.It is noted that
In another embodiment, energy-storage travelling wave tube 610, which also can be for example, is electrically connected between input terminal IN and energy-storage travelling wave tube 110.Also that is,
In another embodiment, the first end of energy-storage travelling wave tube 610 is electrically connected energy-storage travelling wave tube 110, and the second end electricity of energy-storage travelling wave tube 610
Property connection input terminal IN.
Fig. 7 is the circuit diagram of the filter of another embodiment according to the present invention.Compared to Fig. 3 embodiments, the filter of Fig. 7
Wave device 700 further includes energy-storage travelling wave tube 710, series resonant circuit 720 and antiresonant circuit 730.Wherein, energy-storage travelling wave tube 710 is set
It sets between energy-storage travelling wave tube 310 and output end OUT, and energy-storage travelling wave tube 710 can be for example a capacitance C73.Series resonant circuit 720
It is identical as the circuit structure of series resonant circuit 320, and the circuit structure of antiresonant circuit 730 and antiresonant circuit 140
It is identical.For example, series resonant circuit 720 includes the inductance L71 and capacitance C71 being serially connected, and antiresonant circuit 730 includes
Inductance L72 parallel with one another and capacitance C72.In addition, series resonant circuit 720 is repeatedly connected on energy storage member with antiresonant circuit 730
Between the second end and ground terminal of part 710.Thereby, the filter 700 of Fig. 7 is filtered can be for example 8 ranks with high pass kenel
Device.In another embodiment, energy-storage travelling wave tube 710, which also can be for example, is electrically connected between input terminal IN and energy-storage travelling wave tube 310.
It is noted that those skilled in the art also can add one respectively according to design at the both ends of filter
Series resonant circuit filters out the harmonic distortion (harmonic distortion) of second order to increase another filtered band.Citing
For, Fig. 8 is the circuit diagram of the filter of another embodiment according to the present invention.Compared to Fig. 1 embodiments, filter 800
It further include series resonant circuit 810 and 820.Wherein, series resonant circuit 810 is electrically connected input terminal IN, and series resonance electricity
Road 820 is electrically connected output end OUT.
Series resonant circuit 810 and 820 respective a capacitances and an inductance including being serially connected, and the capacitance and inductance
Series sequence can arbitrarily exchange.For example, series resonant circuit 810 includes capacitance C81 and inductance L81, and series resonant circuit
820 include capacitance C82 and inductance L82.Capacitance C81 and inductance L81 are sequentially connected between input terminal IN and ground terminal, and capacitance
The series sequence of C81 and inductance L81 can exchange.Similarly, capacitance C82 and inductance L82 is sequentially connected on output end OUT and connects
Between ground terminal, and the series sequence of capacitance C82 and inductance L82 can exchange.Thereby, filter 800 can pass through series resonance electricity
Road 810 and 820 increases another filtered band.
For example, Fig. 9 is the schematic diagram of the frequency response of the filter to definition graph 8.As shown in figure 9, filter
800 can be generated by energy-storage travelling wave tube 110, series resonant circuit 120 and 130 and antiresonant circuit 140 and 150 passband 910,
Stopband 920 and filtered band 930, and filter 800 can more generate another filtering frequency by series resonant circuit 810 and 820
Band 940, thereby to filter out the harmonic distortion of second order.Wherein, the centre frequency f1 of the filtered band 940 can pass through formula (1)
It is expressed as
L1 is the inductance value of inductance L81 and inductance L82, and the capacitance that C1 is capacitance C81 and capacitance C82.In addition, filtering
The passband 910 of device 800, which can be for example, covers 5.17~5.25GHz (also that is, UNII-1 frequency bands), and the frequency of the second harmonic is by phase
Equal to (5.17+5.25)=10.42GHz.It, can be by the centre frequency f1 of filtered band 940 in order to inhibit the harmonic distortion of second order
Be set as 10.42GHz, and can be calculated by above-mentioned formula (1) inductance L81 and L82 inductance value and capacitance C81 with
The capacitance of C82.
Similarly, Figure 10 is the circuit diagram of the filter of another embodiment according to the present invention, and Figure 11 is to say
The schematic diagram of the frequency response of the filter of bright Figure 10.Compared to Fig. 3 embodiments, filter 1000 further includes series resonant circuit
1010 and 1020.Wherein, series resonant circuit 1010 be electrically connected input terminal IN, and series resonant circuit 1020 be electrically connected it is defeated
Outlet OUT.Series resonant circuit 1010 includes the inductance L101 being serially connected and capacitance C101, and inductance L101 and capacitance C101
Series sequence can exchange.Similarly, series resonant circuit 1020 includes the capacitance C102 and inductance L102 being serially connected, and
The series sequence of capacitance C102 and inductance L102 can exchange.Thereby, filter 1000 can by series resonant circuit 1010 with
1020 increase another filtered band.
For example, as shown in figure 11, filter 1000 can pass through energy-storage travelling wave tube 310, series resonant circuit 320 and 330
And antiresonant circuit 140 and 150 generates passband 1110, stopband 1120 and filtered band 1130, and filter 1000 may be used also
Another filtered band 1140 is generated by series resonant circuit 1010 and 1020, thereby to filter out the harmonic distortion of second order.Example
Such as, the centre frequency f2 of filtered band 1140 can be expressed as by formula (2)
L2 is the inductance value of inductance L101 and inductance L102, and the capacitance that C2 is capacitance C101 and capacitance C102.In addition,
The passband 1110 of filter 1000, which can be for example, covers 5.735~5.815GHz (also that is, UNII-3 frequency bands), and the second harmonic
Frequency will be equal to (5.735+5.815)=11.55GHz.It, can be by filtered band 1140 in order to inhibit the harmonic distortion of second order
Centre frequency is set as 11.55GHz, and can be calculated by above-mentioned formula (2) inductance L101 and L102 inductance value and
The capacitance of capacitance C101 and C102.
In comparison with existing filter, the filter 100,300,600,700,800 cited by above-mentioned each implementation column with
1000 have preferable frequency response, and attenuation slope is also more precipitous.Therefore, the filter cited by above-mentioned each implementation column
Characteristic with precipitous filter curve or high-isolation, and then can be applicable to the wireless communication dress operated with parallel Double RF
In setting, to thereby account for wireless communication device interfering with each other between neighbouring two frequency bands.
For example, Figure 12 is the block diagram of the wireless communication device of an embodiment according to the present invention.As shown in figure 12, wirelessly
Communication device 1200 includes that transceiver 1211 and 1212, power amplifier 1221 and 1222, first filter 1230, second filter
Device 1240, switch 1251 and 1252 and antenna 1261 and 1262.Wherein, transceiver 1211 and 1212 is respectively including at least one letter
Number end.For example, the signal end of transceiver 1211 includes transmitting terminal TX1 and receiving terminal RX1, and transceiver 1211 can pass through hair
It penetrates end TX1 or receiving terminal RX1 and is electrically connected to antenna 1261.Similarly, the signal end of transceiver 1212 includes transmitting terminal TX2
With receiving terminal RX2, and transceiver 1212 can be electrically connected to antenna 1262 by transmitting terminal TX2 or receiving terminal RX2.Another
In embodiment, transceiver 1211 can include respectively multiple transmitting terminals and multiple receiving terminals with transceiver 1212, and more can respectively take
The multiple transmitting terminal and multiple receiving terminals are connected to mutiple antennas with multiple switch, and then cause transceiver 1211 and transmitting-receiving
Device 1212 has the transmission mechanism of multiple-input and multiple-output (Multiple-Input Multiple-Output, abbreviation MIMO), from
And increase the transmission rate of data.
For transceiver 1211, switch 1251 has first end to third end.The first end of switch 1251 is electrically connected
Antenna 1261, and the second end of switch 1251 is electrically connected to receiving terminal RX1.Power amplifier 1221 and first filter 1230
It is connected between transmitting terminal TX1 and the third end of switch 1251.Transceiver 1211 controls Signal-controlled switch 1251 using one,
To cause the first end of switch 1251 to be conducted to second end or the third end of switch 1251.In other words, switch 1251 can be by day
Line 1261 is conducted to first filter 1230 or receiving terminal RX1, to cause wireless communication device 1200 that can pass through antenna
1261 transmittings or reception radiofrequency signal.For example, when antenna 1261 is conducted to first filter 1230 by switch 1251,
Power amplifier 1221 can amplify the signal from transmitting terminal TX1, and generate an output signal according to this.1230 meeting of first filter
The output signal of power amplifier 1221 is filtered, to cause wireless communication device 1200 that can emit by antenna 1261
Radiofrequency signal of the position in the passband of first filter 1230.
For transceiver 1212, switch 1252 has first end to third end.The first end of switch 1252 is electrically connected
Antenna 1262, and the second end of switch 1252 is electrically connected to receiving terminal RX2.Power amplifier 1222 and second filter 1240
It is connected between transmitting terminal TX2 and the third end of switch 1252.Transceiver 1212 controls Signal-controlled switch 1252 using one,
To cause the first end of switch 1252 to be conducted to second end or the third end of switch 1252.In other words, switch 1252 can be by day
Line 1262 is conducted to second filter 1240 or receiving terminal RX2, to cause wireless communication device 1200 that can pass through antenna
1262 transmittings or reception radiofrequency signal.For example, when antenna 1262 is conducted to second filter 1240 by switch 1252,
Power amplifier 1222 can amplify the signal from transmitting terminal TX2, and generate an output signal according to this.1240 meeting of second filter
The output signal of power amplifier 1222 is filtered, to cause wireless communication device 1200 that can emit by antenna 1262
Radiofrequency signal of the position in the passband of second filter 1240.
It is noted that the passband of first filter 1230 is identical as the stopband of second filter 1240, and the first filter
The stopband of wave device 1230 is identical as the passband of second filter 1240.For example, first filter 1230 can be for example Fig. 1's
Filter 100 with low pass kenel, and second filter 1240 can be for example the filter 300 with high pass kenel of Fig. 3.
At this point, as shown in Fig. 2 and Fig. 4, first filter 1230 include passband 210 (also that is, UNII-1 frequency bands), stopband 220 (also that is,
UNII-3 frequency bands) and filtered band 230 (also that is, 2.412~2.484GHz), and second filter 1240 includes passband 410
(also that is, UNII-3 frequency bands), stopband 420 (also that is, UNII-1 frequency bands) and filtered band 430 (also that is, 2.412~
2.484GHz)。
Thereby, wireless communication device 1200 can will simultaneously emit position in first filter 1230 and second filter 1240
The radiofrequency signal of two passbands (also that is, UNII-1 frequency bands and UNII-3 frequency bands), and can avoid in neighbouring two passbands (also that is, UNII-
1 frequency band and UNII-3 frequency bands) between interfere with each other, to cause wireless communication device 1200 to can perform parallel Double RF behaviour
Make.In addition, wireless communication device 1200 can also be by the filtered band of first filter 1230 and second filter 1240 (also
That is, 2.412~2.484GHz) signal in filtered band additionally is filtered out, to help to promote wireless communication device 1200
Communication quality or reduce other application the communication device of 2.412~2.484GHz frequency bands interference.Furthermore due to the first filter
Wave device 1230 need not promote exponent number with second filter 1240 just has enough attenuations, and first filter 1230 and second
Filter 1240 can be composed of chip inductance and chip capacity, therefore first filter 1230 can with second filter 1240
It is effectively reduced the production cost of wireless communication device 1200, and contributes to the micromation of wireless communication device 1200.
Although Figure 12 embodiments list the framework of wireless communication device 1200, it is not intended to limiting the invention.This
Multiple filters can be arranged on the transmission path and RX path of transceiver according to design in field technology personnel, with into
One step promotes the communication quality of wireless communication device.For example, Figure 13 is the wireless communication of another embodiment according to the present invention
The block diagram of device.
Compared to Figure 12 embodiments, the wireless communication device 1300 of Figure 13 further includes third filter 1310~1340.Its
In, the circuit structure of third filter 1310 and 1320 is identical to the circuit structure of first filter 1230.For example, the first filtering
Device 1230 can be for example the filter with low pass kenel of Fig. 1, Fig. 6 or Fig. 8 with third filter 1310~1320.In addition,
Third filter 1310 is inserted between transmitting terminal TX1 and power amplifier 1221, and third filter 1320 is inserted in reception
It holds between RX1 and the second end of switch 1251.The circuit structure of third filter 1330 and 1340 is identical to second filter
1240 circuit structure is identical.For example, second filter 1240 and third filter 1330~1340 can be for example Fig. 3, Fig. 7 or
The filter with high pass kenel of Figure 10.In addition, third filter 1330 is inserted in transmitting terminal TX2 and power amplifier 1222
Between, and third filter 1340 is inserted between receiving terminal RX2 and the second end of switch 1252.Thereby, wireless communication device
1300 by can simultaneously received bit third filter 1320 and third filter 1340 two passbands (also that is, UNII-1 frequency bands with
UNII-3 frequency bands) radiofrequency signal.In addition, wireless communication device 1300 can also be decayed more by third filter 1310~1340
More air interference (for example, co-channel interference, adjacent frequency are interfered), to help to promote the communication product of wireless communication device 1300
Matter.It is noted that those skilled in the art can select first filter 1230 and third filter 1310 according to design
One is arranged in the transmission path of transceiver 1211, and can be according to design by second filter 1240 and third filter 1330
One is selected to be arranged in the transmission path of transceiver 1212.
In conclusion the present invention is repeatedly to connect series resonant circuit and antiresonant circuit respectively at the both ends of energy-storage travelling wave tube,
With thereby shaping filter.The filter, which need not promote exponent number, just has enough attenuations, and can be by chip inductance and core
Chip capacitor is composed.Therefore, filter can be effectively reduced the production cost of wireless communication device, and help to wirelessly communicate
The micromation of device.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any people in the art
Member, without departing from the spirit and scope of the present invention, can make some changes and embellishment, therefore protection scope of the present invention is with this
Subject to the claim of invention.
Claims (20)
1. a kind of filter has an input terminal and an output end, and includes：
One first energy-storage travelling wave tube, is electrically connected between the input terminal and the output end；
One first and one second series resonant circuit includes respectively one first capacitance and one first inductance being serially connected；And
One first and one second antiresonant circuit, respectively include one second capacitance and one second inductance parallel with one another,
Wherein, first series resonant circuit and first antiresonant circuit be connected on the first end of first energy-storage travelling wave tube with
Between one ground terminal, and second series resonant circuit and second antiresonant circuit are connected on the of first energy-storage travelling wave tube
Between two ends and the ground terminal, to form the filter with a passband and a stopband.
2. filter as described in claim 1, wherein first energy-storage travelling wave tube are a third inductance, the first of the third inductance
End is electrically connected the input terminal and first capacitance in first series resonant circuit, and the second end of the third inductance is electrical
Connect the output end and first capacitance in second series resonant circuit.
3. filter as claimed in claim 2, first inductance wherein in first series resonant circuit is electrically connected should
Second capacitance in first antiresonant circuit and second inductance, and first inductance in second series resonant circuit
Second capacitance and second inductance being electrically connected in second antiresonant circuit.
4. filter as claimed in claim 3, wherein the third inductance, this first with second series resonant circuit in this
A little first capacitances and these first inductance and this first in second antiresonant circuit these second capacitances and these
Second inductance is all chip type component.
5. filter as described in claim 1, wherein first energy-storage travelling wave tube are a third capacitance, the first of the third capacitance
End is electrically connected the input terminal and first inductance in first series resonant circuit, and the second end of the third capacitance is electrical
Connect the output end and first inductance in second series resonant circuit.
6. filter as claimed in claim 5, first capacitance wherein in first series resonant circuit is electrically connected should
Second capacitance in first antiresonant circuit and second inductance, and first capacitance in second series resonant circuit
Second capacitance and second inductance being electrically connected in second antiresonant circuit.
7. filter as claimed in claim 6, wherein the third capacitance, this first with second series resonant circuit in this
A little first capacitances and these first inductance and this first in second antiresonant circuit these second capacitances and these
Second inductance is all chip type component.
8. filter as described in claim 1, further includes：
One second energy-storage travelling wave tube, first end are electrically connected first energy-storage travelling wave tube, and the second end of second energy-storage travelling wave tube is electrical
Connect the input terminal or the output end；
One third series resonant circuit；And
One third antiresonant circuit, wherein the third series resonant circuit and the third antiresonant circuit be connected on this second
Between the second end of energy-storage travelling wave tube and the ground terminal, and to increase the exponent number of the filter.
9. filter as described in claim 1, further includes：
One third series resonant circuit, is electrically connected the input terminal；And
One the 4th series resonant circuit, is electrically connected the output end, wherein the filter by the third series resonant circuit with
4th series resonant circuit filters out the signal in a filtered band.
10. filter as claimed in claim 9, wherein the third series resonant circuit with the 4th series resonant circuit respectively
Including an inductance and a capacitance.
11. a kind of wireless communication device, including：
One first transceiver is electrically connected a first antenna by least one first signal end；
One second transceiver is electrically connected one second antenna by an at least second signal end；
One first filter, including one first passband and one first stopband, and be arranged at least one first signal end and this
Between one antenna；And
One second filter, including one second passband and one second stopband, and be arranged an at least second signal end and this
Between two antennas, wherein first passband is identical as second stopband, and first stopband is identical as second passband, and this
One filter respectively has an input terminal and an output end with the second filter, and includes respectively：
One first energy-storage travelling wave tube, is electrically connected between the input terminal and the output end；
One first and one second series resonant circuit includes respectively one first capacitance and one first inductance being serially connected；And
One first and one second antiresonant circuit, respectively including one second capacitance and one second inductance parallel with one another, wherein
First series resonant circuit is connected on the first end and a ground terminal of first energy-storage travelling wave tube with first antiresonant circuit
Between, the second end which is connected on first energy-storage travelling wave tube with second antiresonant circuit connects with this
Between ground terminal.
12. wireless communication device as claimed in claim 11, wherein at least one first signal end include one first transmitting terminal
With one first receiving terminal, and the wireless communication device further includes：
There is one first switch a first end to a third end, the first end of the first switch to be electrically connected the first antenna, should
The second end of first switch is electrically connected first receiving terminal；And
One first power amplifier, with the first filter be connected on first transmitting terminal and the first switch third end it
Between, wherein the first end of the first switch is conducted to second end or the third end of the first switch by the first transceiver.
13. wireless communication device as claimed in claim 12, further includes：
One third filter, it is identical as the circuit structure of the first filter, and be inserted in first receiving terminal and first opened with this
Between the second end of pass.
14. wireless communication device as claimed in claim 12, wherein an at least second signal end include one second transmitting terminal
With one second receiving terminal, and the wireless communication device further includes：
There is one second switch a first end to a third end, the first end of the second switch to be electrically connected second antenna, should
The second end of second switch is electrically connected second receiving terminal；And
One second power amplifier, with the second filter be connected on second transmitting terminal and the second switch third end it
Between, wherein the first end of the second switch is conducted to second end or the third end of the second switch by the second transceiver.
15. wireless communication device as claimed in claim 14, further includes：
One third filter, it is identical as the circuit structure of the second filter, and be inserted in second receiving terminal and second opened with this
Between the second end of pass.
16. wireless communication device as claimed in claim 11, first energy-storage travelling wave tube wherein in the first filter is one
Third inductance, the first end of the third inductance be electrically connected the input terminal of the first filter and the first filter this
First capacitance in one series resonant circuit, and the second end of the third inductance is electrically connected the output of the first filter
End and first capacitance in second series resonant circuit of the first filter.
17. wireless communication device as claimed in claim 16, first energy-storage travelling wave tube wherein in the second filter is one
Third capacitance, the first end of the third capacitance be electrically connected the input terminal of the second filter and the second filter this
First inductance in one series resonant circuit, and the second end of the third capacitance is electrically connected the output of the second filter
End and first inductance in second series resonant circuit of the second filter.
18. wireless communication device as claimed in claim 17, wherein the third inductance, the third capacitance, the first filter
With in the second filter these first capacitances and these first inductance and the first filter in the second filter
These second capacitances and these second inductance be all chip type component.
19. wireless communication device as claimed in claim 11, the wherein first filter are respectively also wrapped with the second filter
It includes：
One second energy-storage travelling wave tube, first end are electrically connected first energy-storage travelling wave tube, and the second end of second energy-storage travelling wave tube is electrical
Connect the output end；
One third series resonant circuit is identical as the circuit structure of first series resonant circuit；And
One third antiresonant circuit, wherein third series resonance identical as the circuit structure of first antiresonant circuit
Circuit and the third antiresonant circuit are connected between the second end of second energy-storage travelling wave tube and the ground terminal.
20. wireless communication device as claimed in claim 11, the wherein first filter are respectively also wrapped with the second filter
It includes：
One third series resonant circuit, is electrically connected the input terminal；And
One the 4th series resonant circuit, is electrically connected the output end, and wherein the third series resonant circuit is connected humorous with the 4th
Circuit shake to filter out the signal in a filtered band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510176781.4A CN106160689B (en) | 2015-04-15 | 2015-04-15 | Wireless communication device and its filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510176781.4A CN106160689B (en) | 2015-04-15 | 2015-04-15 | Wireless communication device and its filter |
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| Publication Number | Publication Date |
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| CN106160689A CN106160689A (en) | 2016-11-23 |
| CN106160689B true CN106160689B (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510176781.4A Active CN106160689B (en) | 2015-04-15 | 2015-04-15 | Wireless communication device and its filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116667805A (en) * | 2023-07-21 | 2023-08-29 | 荣耀终端有限公司 | Resonant structure, radio frequency system and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776988A (en) * | 2005-11-28 | 2006-05-24 | 中国南方电网有限责任公司超高压输电公司 | Low-loss multi-tuned passive power filter |
| CN101939912A (en) * | 2008-02-05 | 2011-01-05 | 日本电波工业株式会社 | Filter, portable terminal, and electronic component |
| CN102170133A (en) * | 2011-04-26 | 2011-08-31 | 湖北中兴电力试验研究有限公司 | Double-tuned filter suitable for automatic tracking and compensation arc extinguishing coil complete equipment |
| CN103888095A (en) * | 2014-02-21 | 2014-06-25 | 广东风华高新科技股份有限公司 | Diplexer and multiplexer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1450486A1 (en) * | 2003-02-20 | 2004-08-25 | TDK Corporation | Multi-Mode Filter |
| EP2168202B1 (en) * | 2007-06-27 | 2013-07-31 | Superconductor Technologies, Inc. | Low-loss tunable radio frequency filter |
-
2015
- 2015-04-15 CN CN201510176781.4A patent/CN106160689B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776988A (en) * | 2005-11-28 | 2006-05-24 | 中国南方电网有限责任公司超高压输电公司 | Low-loss multi-tuned passive power filter |
| CN101939912A (en) * | 2008-02-05 | 2011-01-05 | 日本电波工业株式会社 | Filter, portable terminal, and electronic component |
| CN102170133A (en) * | 2011-04-26 | 2011-08-31 | 湖北中兴电力试验研究有限公司 | Double-tuned filter suitable for automatic tracking and compensation arc extinguishing coil complete equipment |
| CN103888095A (en) * | 2014-02-21 | 2014-06-25 | 广东风华高新科技股份有限公司 | Diplexer and multiplexer |
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| Publication number | Publication date |
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| CN106160689A (en) | 2016-11-23 |
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