CN106160689A - Radio communication device and its wave filter - Google Patents
Radio communication device and its wave filter Download PDFInfo
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- CN106160689A CN106160689A CN201510176781.4A CN201510176781A CN106160689A CN 106160689 A CN106160689 A CN 106160689A CN 201510176781 A CN201510176781 A CN 201510176781A CN 106160689 A CN106160689 A CN 106160689A
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Abstract
A kind of radio communication device and its wave filter.Described wave filter has input and outfan, 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 each includes the first electric capacity and the first inductance being serially connected.First and second antiresonant circuit each includes the second electric capacity parallel with one another and the second inductance.First series resonant circuit and the first antiresonant circuit are repeatedly connected between the first end and the earth 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 the earth terminal of the first energy-storage travelling wave tube.
Description
Technical field
The present invention relates to a kind of radio communication device and its wave filter, and particularly relate to one and have parallel double
The radio communication device of radio frequency operation and its wave filter.
Background technology
In recent years, the radio area network meeting IEEE 802.11ac communication standard utilizes parallel Double RF
Technology (Concurrent Dual-Radio Technology) increases the connection number of user.Wherein, IEEE
802.11ac communication standard can use exempts from license National information infrastructure NII (Unlicensed National
Information Infrastructure, is called for short UNII) frequency bands for communication.Under parallel Double RF operates,
Two transceivers in radio communication device can operate at neighbouring UNII-1 (5.17～5.25GHz) frequently simultaneously
Band and UNII-3 (5.735～5.815GHz) frequency band.Additionally, in order to avoid radio communication device is above-mentioned two
Interfering between frequency band, radio communication device must be arranged has precipitous filter curve and high-isolation
The wave filter of (high isolation).
It is said that in general, thin film block resonance filter (thin-film bulk acoustic resonator, abbreviation
FBAR) design often it is used to dielectric resonance wave filter (dielectric resonator filter is called for short DRF)
Become there is precipitous filter curve or high isolation filter.But, it is special that above-mentioned wave filter must use
Technique makes, the most expensive and have bigger area.In addition, prior art is mostly
The attenuation of wave filter is improved by the exponent number (order) improving wave filter.But, along with wave filter
The raising of exponent number, it will increase the size of wave filter, and wave filter can be caused to have bigger insertion loss
With poor amplitude flatness.In other words, existing wave filter often increases the generation of radio communication device
Produce cost, and limit the miniaturization of radio communication device.
Summary of the invention
The present invention provides a kind of radio communication device and its wave filter, the most repeatedly connects at the two ends of energy-storage travelling wave tube
Series resonant circuit and antiresonant circuit, with thereby shaping filter.Consequently, it is possible to wave filter will have
Help reduce the production cost of radio communication device, and contribute to the miniaturization of radio communication device.
The wave filter of the present invention has input and outfan, and includes the first energy-storage travelling wave tube, first and
Two series resonant circuits and first and second antiresonant circuit.First and second series resonant circuit is each
From including the first electric capacity and the first inductance that are serially connected.First and second antiresonant circuit each includes
Second electric capacity parallel with one another and the second inductance, and the first series resonant circuit and the first antiresonant circuit
Repeatedly it is connected between the first end and the earth terminal of the first energy-storage travelling wave tube, to form the filtering that there is passband with stopband
Device.
The radio communication device of the present invention, including first transceiver, second transceiver, the first wave filter with
And second wave filter.First transceiver is electrically connected with first antenna by least one first signal end.Second
Transceiver is electrically connected with the second antenna by least one secondary signal end.First wave filter includes the first passband
With the first stopband, and described in being arranged between at least one first signal end and first antenna.Second wave filter
Including the second passband and the second stopband, and at least one secondary signal end described in being arranged on and the second antenna it
Between.First passband and the second stopband are identical, and the first stopband and the second passband identical.First wave filter with
Second wave filter each has input and outfan, and each includes the first energy-storage travelling wave tube, first and
Two series resonant circuits and first and second antiresonant circuit.First and second series resonant circuit is each
From including the first electric capacity and the first inductance that are serially connected.First and second antiresonant circuit each includes
Second electric capacity parallel with one another and the second inductance.First series resonant circuit and the first antiresonant circuit are repeatedly
It is connected between the first end and the earth terminal of the first energy-storage travelling wave tube.Second series resonant circuit and the second parallel connection are humorous
The circuit that shakes repeatedly is connected between the second end and the earth terminal of the first energy-storage travelling wave tube.
Based on above-mentioned, the present invention repeatedly connects the first series resonant circuit and at the first end of the first energy-storage travelling wave tube
One antiresonant circuit, and repeatedly connect the second series resonant circuit and second at the second end of the first energy-storage travelling wave tube
Antiresonant circuit, with thereby shaping filter.Consequently, it is possible to wave filter will assist in reduction channel radio
The production cost of T unit, and contribute to the miniaturization of radio communication device.
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate
Accompanying drawing is described in detail below.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the wave filter according to one embodiment of the invention.
Fig. 2 is the schematic diagram of the frequency response of the wave filter in order to explanatory diagram 1.
Fig. 3 is the circuit diagram of the wave filter according to another embodiment of the present invention.
Fig. 4 is the schematic diagram of the frequency response of the wave filter in order to explanatory diagram 3.
Fig. 5 is the schematic layout pattern of the wave filter according to one embodiment of the invention.
Fig. 6 is the circuit diagram of the wave filter according to further embodiment of this invention.
Fig. 7 is the circuit diagram of the wave filter according to further embodiment of this invention.
Fig. 8 is the circuit diagram of the wave filter according to further embodiment of this invention.
Fig. 9 is the schematic diagram of the frequency response of the wave filter in order to explanatory diagram 8.
Figure 10 is the circuit diagram of the wave filter according to further embodiment of this invention.
Figure 11 is the schematic diagram of the frequency response of the wave filter that Figure 10 is described.
Figure 12 is the block diagram of the radio communication device according to one embodiment of the invention.
Figure 13 is the block diagram of the radio communication device according to another embodiment of the present invention.
[description of reference numerals]
100,300,600,700,800,1000: wave filter
110,310,610,710: energy-storage travelling wave tube
120,130,320,330,620,720,810,820,1010,1020: series resonance electricity
Road
140,150,630,730: antiresonant circuit
C11, C12, C21, C22, C3, C31, C32, C61, C62, C71～C73, C81,
C82, C101, C102: electric capacity
L11, L12, L21, L22, L3, L31, L32, L61～L63, L71, L72, L81,
L82, L101, L102: inductance
IN: input
OUT: outfan
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: radio communication device
1211,1212: transceiver
1221,1222: power amplifier
1230: the first wave filter
1240: the second wave filter
1310～1340: the three wave filter
1251,1252: switch
1261,1262: antenna
TX1, TX2: transmitting terminal
RX1, RX2: receiving terminal
Detailed description of the invention
Fig. 1 is the circuit diagram of the wave filter according to one embodiment of the invention.As it is shown in figure 1, filtering
Device 100 has input IN and outfan OUT, and wave filter 100 includes energy-storage travelling wave tube 110, string
Connection resonance circuit 120 and 130 and antiresonant circuit 140 and 150.Wherein, energy-storage travelling wave tube 110
It is electrically connected between input IN and outfan OUT.Series resonant circuit 120 each wraps with 130
Include the electric capacity and an inductance being serially connected.Such as, series resonant circuit 120 includes the electricity being serially connected
Hold C11 and inductance L11, and series resonant circuit 130 includes the electric capacity C12 and the inductance that are serially connected
L12。
Antiresonant circuit 140 and 150 each includes an electric capacity parallel with one another and an inductance.Such as,
Antiresonant circuit 140 includes electric capacity C21 parallel with one another and inductance L21, and antiresonant circuit 150
Including electric capacity C22 parallel with one another and inductance L22.Further to seeing, series resonant circuit 120 with
Antiresonant circuit 140 is repeatedly connected between the first end and the earth terminal of energy-storage travelling wave tube 110.Series resonance electricity
Road 130 and antiresonant circuit 150 are repeatedly connected between the second end and the earth terminal of energy-storage travelling wave tube 110.Mat
This, can form the wave filter 100 having passband (pass band) with stopband (stop band).
For example, in Fig. 1 embodiment, energy-storage travelling wave tube 110 can be for example an inductance L3.Additionally,
First end of inductance L3 is electrically connected with input IN and the electric capacity C11 in series resonant circuit 120, and
Second end of inductance L3 is electrically connected with outfan OUT and the electric capacity C12 in series resonant circuit 130.
Inductance L11 in series resonant circuit 120 is electrically connected with the electric capacity C21 in antiresonant circuit 140
With inductance L21.Inductance L12 in series resonant circuit 130 is electrically connected with in antiresonant circuit 150
Electric capacity C22 and inductance L22.Thereby, energy-storage travelling wave tube 110, series resonant circuit 120 and 130 with
And resonance circuit 140 and 150 will can form the 5 rank wave filter with low pass kenel.
Fig. 2 is the schematic diagram of the frequency response of the wave filter in order to explanatory diagram 1.As in figure 2 it is shown, filtering
The characteristic curve of device 100 includes passband 210 and stopband 220.Wherein, the frequency of passband 210 contains
5.17～5.25GHz (that is, UNII-1 frequency band), and the frequency of stopband 220 (also contains 5.735～5.815GHz
That is, UNII-3 frequency band).Additionally, wave filter 100 is at the insertion loss (insertion loss) of passband 210
It is about 0.7dB, and wave filter 100 is minimum up to-39dB in the attenuation of stopband 220.In other words, filter
The passband 210 of ripple device 100 is the most smooth, and wave filter 100 is in intermediate zone the most quickly.
Therefore, with existing wave filter in comparison, the exponent number that need not expand wave filter 100 just can cause filter
Ripple device 100 has good usefulness, thus contributes to reducing the production cost of radio communication device, and has
Help the miniaturization of radio communication device.In addition, the characteristic curve of wave filter 100 includes that two turn
Break P21 and P22.Therefore, wave filter 100 in addition to position of can decaying is at the signal of stopband 220,
Also can decay further at the signal of filtered band 230 (that is, 2.412～2.484GHz).Such as,
The wave filter 100 attenuation in filtered band 230 is minimum up to-27dB.
It is noted that in Fig. 1 embodiment, the capacitance of electric capacity C11 is equal to electric capacity C12
Capacitance, and the capacitance of electric capacity C21 is equal to the capacitance of electric capacity C22.Additionally, electric capacity C11
Capacitance more than the capacitance of electric capacity C21.The inductance value of inductance L11 is equal to the electricity of inductance L12
Inductance value, and the inductance value of inductance L21 is equal to the inductance value of inductance L22.Additionally, the electricity of inductance L3
The inductance value inductance value more than inductance L11, and the inductance value that the inductance value of inductance L21 is more than inductance L3.
Additionally, those skilled in the art also can adjust the capacitance of above-mentioned each electric capacity and each inductance according to design
Inductance value.
Although Fig. 1 lists the type of wave filter, but it is not limited to the present invention.Art technology
Electricity in the element of personnel's adjustable energy-storage travelling wave tube 110, and series resonant circuit 120 and 130
Hold the order of connection with inductance, with thereby in parallel humorous by energy-storage travelling wave tube, two series resonant circuits and two
The circuit that shakes forms the wave filter with high pass kenel.
For example, Fig. 3 is the circuit diagram of the wave filter according to another embodiment of the present invention.At figure
In 3 embodiments, energy-storage travelling wave tube 310 can be for example an electric capacity C3.Additionally, the first end electricity of electric capacity C3
Property connect the inductance L31 in input IN and series resonant circuit 320, and the second end electricity of electric capacity C3
Property connect the inductance L32 of outfan OUT and series resonant circuit 330.In series resonant circuit 320
Electric capacity C21 and the inductance L21 that is electrically connected with in antiresonant circuit 140 of electric capacity C31, and it is humorous to connect
The electric capacity C32 in circuit 330 that shakes is electrically connected with the electric capacity C22 in antiresonant circuit 150 and inductance
L22.Wherein, electric capacity C31, C32, C21 are identical with the capacitance of C22, and the electric capacity of electric capacity C3
The value capacitance less than electric capacity C31.The inductance value of inductance L31 is equal to the inductance value of inductance L32,
And the inductance value that the inductance value of inductance L31 is less than inductance L21.Thereby, energy-storage travelling wave tube 310, connect humorous
Shake circuit 320 and 330 and resonance circuit 140 and 150 will can form the 5 rank filters with high pass kenel
Ripple device.
Fig. 4 is the schematic diagram of the frequency response of the wave filter in order to explanatory diagram 3.As shown in Figure 4, filtering
The characteristic curve of device 300 includes passband 410 and stopband 420.Wherein, the frequency of passband 410 contains
5.735～5.815GHz (that is, UNII-3 frequency band), and the frequency of stopband 420 (also contains 5.17～5.25GHz
That is, UNII-1 frequency band).Additionally, wave filter 300 is about 0.9dB at the insertion loss of passband 410, and
Wave filter 300 is minimum up to-41dB in the attenuation of stopband 420.Furthermore, the characteristic of wave filter 300
Curve includes two turning point P41 and P42.Therefore, wave filter 300 is except position of can decaying is at stopband
Beyond the signal of 420, position of also can decaying further is filtered band 430 (that is, 2.412～2.484GHz)
Signal.Such as, the wave filter 300 attenuation in filtered band 430 is minimum up to-47dB.
It should be noted that the electric capacity C11 in above-mentioned wave filter 100 and 300, C12, C21, C22,
C3, C31, C32 and inductance L11, L12, L21, L22, L3, L31, L32 can be one respectively
Chip type component.That is, electric capacity C11 in wave filter 100 and 300, C12, C21, C22, C3,
C31, C32 can be made up of a chip capacity (chip capacitor) respectively, and wave filter 100 and 300
In inductance L11, L12, L21, L22, L3, L31, L32 can be respectively by a chip inductance (chip inductor)
Constituted.In other words, for wave filter 100 and 300 can be combined with chip capacity by chip inductance, because of
This size that can effectively reduce wave filter 100 and 300 and price, thus contribute to radio communication dress
The miniaturization put and the production cost reducing radio communication device.
For example, Fig. 5 is the schematic layout pattern of the wave filter according to one embodiment of the invention.Such as Fig. 5
Shown in, chip type component 511～519 is arranged on a surface 521 of substrate 520.Additionally, it is chip-shaped
Element 511～519 can be a chip inductance or a chip capacity respectively.For example, chip type component
511 and 514～517 can be a chip inductance respectively, and chip type component 512,513,518 and 519
Can be a chip capacity respectively, thus cause chip type component 511～519 can be formed as shown in Figure 1
There is the wave filter of low pass kenel.Additionally, conductor wire 530 with 540 respectively in order to constitute the defeated of wave filter
Enter end and outfan, and conducting surface 550 is in order to the earth terminal as wave filter.
Fig. 1 Yu Fig. 3 embodiment is to enumerate the wave filter 100 and 300 on 5 rank.But, at another
In embodiment, those skilled in the art also can be according to design, by the exponent number of wave filter 100 and 300
Extend to 8,11,14,17 ... rank.For example, Fig. 6 is the filter according to further embodiment of this invention
The circuit diagram of ripple device.Compared to Fig. 1 embodiment, the wave filter 600 of Fig. 6 also includes energy-storage travelling wave tube
610, series resonant circuit 620 and antiresonant circuit 630.Wherein, the first end of energy-storage travelling wave tube 610
It is electrically connected with energy-storage travelling wave tube 110, and the second end of energy-storage travelling wave tube 610 is electrically connected with outfan OUT.This
Outward, energy-storage travelling wave tube 610 can be for example an inductance L63.
With series resonant circuit 120 similarly, series resonant circuit 620 includes electric capacity C61 and inductance
L61, and electric capacity C61 and inductance L61 be sequentially connected on the second end and the antiresonant circuit of inductance L63
Between 630.With antiresonant circuit 140 similarly, antiresonant circuit 630 include inductance L62 with
Electric capacity C62, and inductance L62 and electric capacity C62 is connected in parallel between inductance L61 and earth terminal.Additionally,
Series resonant circuit 620 and antiresonant circuit 630 are repeatedly connected on the second end and the ground connection of energy-storage travelling wave tube 610
Between end.Thereby, energy-storage travelling wave tube 610, series resonant circuit 620 and antiresonant circuit 630 can
The exponent number causing wave filter 600 extends to 8 rank.In other words, the wave filter 600 of Fig. 6 can be for example tool
There are 8 rank wave filter of low pass kenel.It is noted that in another embodiment, energy-storage travelling wave tube 610
Also can be for example and be electrically connected between input IN and energy-storage travelling wave tube 110.That is, implement at another
In example, the first end of energy-storage travelling wave tube 610 is electrically connected with energy-storage travelling wave tube 110, and the of energy-storage travelling wave tube 610
Two ends are electrically connected with input IN.
Fig. 7 is the circuit diagram of the wave filter according to further embodiment of this invention.Implement compared to Fig. 3
Example, the wave filter 700 of Fig. 7 also includes energy-storage travelling wave tube 710, series resonant circuit 720 and parallel resonance
Circuit 730.Wherein, energy-storage travelling wave tube 710 is arranged between energy-storage travelling wave tube 310 and outfan OUT,
And energy-storage travelling wave tube 710 can be for example an electric capacity C73.Series resonant circuit 720 and series resonant circuit 320
Circuit structure identical, and antiresonant circuit 730 is identical with the circuit structure of antiresonant circuit 140.
Such as, series resonant circuit 720 includes inductance L71 and the electric capacity C71 being serially connected, and parallel resonance
Circuit 730 includes inductance L72 parallel with one another and electric capacity C72.Additionally, series resonant circuit 720 with
Antiresonant circuit 730 is repeatedly connected between the second end and the earth terminal of energy-storage travelling wave tube 710.Thereby, Fig. 7
Wave filter 700 will can be for example the 8 rank wave filter with high pass kenel.In another embodiment, storage
Energy element 710 also can be for example and is electrically connected between input IN and energy-storage travelling wave tube 310.
It is noted that those skilled in the art also can divide at the two ends of wave filter according to design
Not Jia Shang a series resonant circuit, to increase another filtered band to filter the harmonic distortion of second order
(harmonic distortion).For example, Fig. 8 is the wave filter according to further embodiment of this invention
Circuit diagram.Compared to Fig. 1 embodiment, wave filter 800 also includes series resonant circuit 810 and 820.
Wherein, series resonant circuit 810 is electrically connected with input IN, and series resonant circuit 820 electrically connects
Meet outfan OUT.
Series resonant circuit 810 and 820 each includes an electric capacity and the inductance being serially connected, and described
The series sequence of electric capacity and inductance can arbitrarily be exchanged.Such as, series resonant circuit 810 includes electric capacity C81
With inductance L81, and series resonant circuit 820 includes electric capacity C82 and inductance L82.Electric capacity C81 and electricity
Sense L81 is sequentially connected between input IN and earth terminal, and the connecting of electric capacity C81 and inductance L81
Order can be exchanged.Similarly, electric capacity C82 and inductance L82 is sequentially connected on outfan OUT and connects
Between ground end, and the series sequence of electric capacity C82 and inductance L82 can be exchanged.Thereby, wave filter 800
Another filtered band can be increased by series resonant circuit 810 and 820.
For example, Fig. 9 is the schematic diagram of frequency response of the wave filter in order to explanatory diagram 8.Such as Fig. 9
Shown in, wave filter 800 can pass through energy-storage travelling wave tube 110, series resonant circuit 120 and 130 and in parallel
Resonance circuit 140 and 150 produces passband 910, stopband 920 and filtered band 930, and wave filter 800
More can produce another filtered band 940 by series resonant circuit 810 and 820, thereby to filter two
The harmonic distortion on rank.Wherein, the mid frequency f1 of described filtered band 940 can pass through formula (1) expression
For
L1 is the inductance value of inductance L81 and inductance L82, and C1 is electric capacity C81 and electric capacity C82
Capacitance.Additionally, the passband 910 of wave filter 800 can be for example and contain 5.17～5.25GHz (that is,
UNII-1 frequency band), and the frequency of the second harmonic will be equal to (5.17+5.25)=10.42GHz.In order to suppress
The harmonic distortion of second order, can be set as 10.42GHz by the mid frequency f1 of filtered band 940, and can
The inductance value of inductance L81 Yu L82 and electric capacity C81 Yu C82 is calculated by above-mentioned formula (1)
Capacitance.
Similarly, Figure 10 is the circuit diagram of the wave filter according to further embodiment of this invention, and figure
The schematic diagram that 11 is the frequency response of the wave filter in order to Figure 10 to be described.Compared to Fig. 3 embodiment, filter
Ripple device 1000 also includes series resonant circuit 1010 and 1020.Wherein, series resonant circuit 1010 electricity
Property connect input IN, and series resonant circuit 1020 is electrically connected with outfan OUT.Series resonance electricity
Road 1010 includes inductance L101 and the electric capacity C101 being serially connected, and inductance L101 and electric capacity C101
Series sequence can exchange.Similarly, series resonant circuit 1020 includes the electric capacity C102 being serially connected
With inductance L102, and the series sequence of electric capacity C102 and inductance L102 can exchange.Thereby, filtering
Device 1000 can increase another filtered band by series resonant circuit 1010 and 1020.
For example, as shown in figure 11, wave filter 1000 can pass through energy-storage travelling wave tube 310, series resonance
Circuit 320 and 330 and antiresonant circuit 140 and 150 produce passband 1110, stopband 1120 with
Filtered band 1130, and wave filter 1000 produces with 1020 also by series resonant circuit 1010
Another filtered band 1140, thereby to filter the harmonic distortion of second order.Such as, filtered band 1140
Mid frequency f2 can pass through formula (2) and be expressed as
L2 is the inductance value of inductance L101 and inductance L102, and C2 is electric capacity C101 and electric capacity C102
Capacitance.Additionally, the passband 1110 of wave filter 1000 can be for example (also contains 5.735～5.815GHz
That is, UNII-3 frequency band), and the frequency of the second harmonic will be equal to (5.735+5.815)=11.55GHz.For
The harmonic distortion of suppression second order, can be set as 11.55GHz by the mid frequency of filtered band 1140,
And can by above-mentioned formula (2) calculate the inductance value of inductance L101 Yu L102 and electric capacity C101 with
The capacitance of C102.
With existing wave filter in comparison, above-mentioned each implement cited by row wave filter 100,300,600,
700,800 and 1000 have preferably frequency response, and attenuation slope is the most precipitous.Therefore,
Above-mentioned each wave filter implemented cited by row has the characteristic of precipitous filter curve or high-isolation, and then
Can be applicable to have in the radio communication device of parallel Double RF operation, to thereby account for radio communication device
Interfering between neighbouring two frequency bands.
For example, Figure 12 is the block diagram of the radio communication device according to one embodiment of the invention.Such as figure
Shown in 12, radio communication device 1200 include transceiver 1211 and 1212, power amplifier 1221 with
1222, first wave filter the 1230, second wave filter 1240, switch 1251 and 1252 and antenna 1261
With 1262.Wherein, transceiver 1211 and 1212 each includes at least one signal end.For example, receive
The signal end sending out device 1211 includes transmitting terminal TX1 and receiving terminal RX1, and transceiver 1211 can pass through
Transmitting terminal TX1 or receiving terminal RX1 is electrically connected to antenna 1261.Similarly, transceiver 1212
Signal end include transmitting terminal TX2 and receiving terminal RX2, and transceiver 1212 can pass through transmitting terminal TX2
Or receiving terminal RX2 is electrically connected to antenna 1262.In another embodiment, transceiver 1211 and receipts
Send out device 1212 and can each include multiple transmitting terminal and multiple receiving terminals, and multiple switch of more can each arranging in pairs or groups
The plurality of transmitting terminal and multiple receiving terminals are connected to multiple antenna, so cause transceiver 1211 with
Transceiver 1212 has multiple-input and multiple-output (Multiple-Input Multiple-Output is called for short MIMO)
Transmission mechanism, thus increase the transfer rate of data.
For transceiver 1211, switch 1251 has the first end to the 3rd end.The of switch 1251
One end is electrically connected with antenna 1261, and the second end of switch 1251 is electrically connected to receiving terminal RX1.Merit
Rate amplifier 1221 and the first wave filter 1230 are connected on the 3rd end of transmitting terminal TX1 and switch 1251
Between.Transceiver 1211 may utilize a control signal and controls switch 1251, to cause the of switch 1251
One end is conducted to switch second end of 1251 or the 3rd end.In other words, switch 1251 can be by antenna 1261
It is conducted to the first wave filter 1230 or receiving terminal RX1, to cause radio communication device 1200 to lead to
Cross antenna 1261 launch or receive radiofrequency signal.For example, when switch 1251 is by antenna 1261
When being conducted to the first wave filter 1230, power amplifier 1221 can amplify the letter from transmitting terminal TX1
Number, and produce an output signal according to this.First wave filter 1230 meeting output to power amplifier 1221
Signal is filtered, to cause radio communication device 1200 can launch position first by antenna 1261
The radiofrequency signal of the passband of wave filter 1230.
For transceiver 1212, switch 1252 has the first end to the 3rd end.The of switch 1252
One end is electrically connected with antenna 1262, and the second end of switch 1252 is electrically connected to receiving terminal RX2.Merit
Rate amplifier 1222 and the second wave filter 1240 are connected on the 3rd end of transmitting terminal TX2 and switch 1252
Between.Transceiver 1212 may utilize a control signal and controls switch 1252, to cause the of switch 1252
One end is conducted to switch second end of 1252 or the 3rd end.In other words, switch 1252 can be by antenna 1262
It is conducted to the second wave filter 1240 or receiving terminal RX2, to cause radio communication device 1200 to lead to
Cross antenna 1262 launch or receive radiofrequency signal.For example, when switch 1252 is by antenna 1262
When being conducted to the second wave filter 1240, power amplifier 1222 can amplify the letter from transmitting terminal TX2
Number, and produce an output signal according to this.Second wave filter 1240 meeting output to power amplifier 1222
Signal is filtered, to cause radio communication device 1200 can launch position second by antenna 1262
The radiofrequency signal of the passband of wave filter 1240.
It is noted that the stopband of the passband of the first wave filter 1230 and the second wave filter 1240 is identical,
And first wave filter 1230 stopband and the passband of the second wave filter 1240 identical.For example, first
Wave filter 1230 can be for example the wave filter 100 with low pass kenel of Fig. 1, and the second wave filter 1240
Can be for example the wave filter 300 with high pass kenel of Fig. 3.Now, as shown in Fig. 2 Yu Fig. 4, the
One wave filter 1230 include passband 210 (that is, UNII-1 frequency band), stopband 220 (that is, UNII-3
Frequency band) and filtered band 230 (that is, 2.412～2.484GHz), and the second wave filter 1240 includes leading to
Band 410 (that is, UNII-3 frequency band), stopband 420 (that is, UNII-1 frequency band) and filtered band 430 is (also
That is, 2.412～2.484GHz).
Thereby, radio communication device 1200 can launch position in the first wave filter 1230 and the second filter simultaneously
The radiofrequency signal of two passbands of ripple device 1240 (that is, UNII-1 frequency band and UNII-3 frequency band), and can keep away
Exempt from interfering between neighbouring two passbands (that is, UNII-1 frequency band and UNII-3 frequency band), thus cause
Make radio communication device 1200 can perform the operation of parallel Double RF.Additionally, radio communication device 1200 is also
Can by the filtered band of the first wave filter 1230 and the second wave filter 1240 (that is,
2.412～2.484GHz) additionally filter the signal in filtered band, thus contribute to promoting radio communication dress
Put the communication quality of 1200 or reduce other and apply communicator dry at 2.412～2.484GHz frequency bands
Disturb.Furthermore, owing to the first wave filter 1230 and the second wave filter 1240 need not promote exponent number and just have foot
Enough attenuations, and the first wave filter 1230 and the second wave filter 1240 can be by chip inductance and chip electricity
Appearance combines, and therefore the first wave filter 1230 and the second wave filter 1240 can be effectively reduced channel radio
The production cost of T unit 1200, and contribute to the miniaturization of radio communication device 1200.
Although Figure 12 embodiment lists the framework of radio communication device 1200, but itself and be not used to limit
The present invention.Those skilled in the art can be according to design, at transmission path and the RX path of transceiver
On multiple wave filter is set, to promote further the communication quality of radio communication device.For example, figure
13 is the block diagram of the radio communication device according to another embodiment of the present invention.
Compared to Figure 12 embodiment, the radio communication device 1300 of Figure 13 also includes the 3rd wave filter
1310～1340.Wherein, the circuit structure of the 3rd wave filter 1310 and 1320 is same as the first wave filter
The circuit structure of 1230.Such as, the first wave filter 1230 and the 3rd wave filter 1310～1320 can be such as
It it is the wave filter with low pass kenel of Fig. 1, Fig. 6 or Fig. 8.Additionally, the 3rd wave filter 1310 string is inserted
Between transmitting terminal TX1 and power amplifier 1221, and the 3rd wave filter 1320 is inserted in receiving terminal
Between second end of RX1 and switch 1251.3rd wave filter 1330 is identical with the circuit structure of 1340
Identical in the circuit structure of the second wave filter 1240.Such as, the second wave filter 1240 and the 3rd wave filter
1330～1340 wave filter with high pass kenel that can be for example Fig. 3, Fig. 7 or Figure 10.Additionally, the
Three wave filter 1330 are inserted between transmitting terminal TX2 and power amplifier 1222, and the 3rd wave filter
Between 1340 the second ends being inserted in receiving terminal RX2 and switch 1252.Thereby, radio communication device
1300 by can simultaneously received bit the 3rd wave filter 1320 and the 3rd wave filter 1340 two passbands (that is,
UNII-1 frequency band and UNII-3 frequency band) radiofrequency signal.Additionally, radio communication device 1300 also can lead to
Cross the 3rd the wave filter 1310～1340 more air interference of decay (such as, co-channel interference, adjacent frequency are disturbed),
Thus contribute to promoting the communication quality of radio communication device 1300.It is noted that this area skill
First wave filter 1230 and the 3rd wave filter 1310 are selected one and are arranged on transmitting-receiving by art personnel's Ke Yi design
On the transmission path of device 1211, and can be according to design by the second wave filter 1240 and the 3rd wave filter
1330 select one is arranged on the transmission path of transceiver 1212.
In sum, the present invention is that the most repeatedly to connect series resonant circuit at the two ends of energy-storage travelling wave tube humorous with in parallel
Shake circuit, with thereby shaping filter.Described wave filter need not promote exponent number and just have enough attenuations,
And can be combined with chip capacity by chip inductance.Therefore, wave filter can be effectively reduced radio communication
The production cost of device, and contribute to the miniaturization of radio communication device.
Although the present invention discloses as above with embodiment, so it is not limited to the present invention, any ability
Field technique personnel, without departing from the spirit and scope of the present invention, can make a little change and retouching, therefore
Protection scope of the present invention is to be as the criterion with the claim of the present invention.
Claims (20)
1. a wave filter, has an input and an outfan, and includes:
One first energy-storage travelling wave tube, is electrically connected between this input and this outfan；
One first and one second series resonant circuit, each includes one first electric capacity and one being serially connected
One inductance；And
One first and one second antiresonant circuit, each includes one second electric capacity parallel with one another and one
Two inductance,
Wherein, this first series resonant circuit and this first antiresonant circuit are repeatedly connected on this first energy storage unit
Between first end and an earth terminal of part, and this second series resonant circuit and this second antiresonant circuit
Repeatedly it is connected between the second end of this first energy-storage travelling wave tube and this earth terminal, to be formed, there is a passband and a resistance
This wave filter of band.
2. wave filter as claimed in claim 1, wherein this first energy-storage travelling wave tube is one the 3rd inductance, should
First end of the 3rd inductance is electrically connected with this input and this first electricity in this first series resonant circuit
Hold, and the second end of the 3rd inductance is electrically connected with this outfan and being somebody's turn to do in this second series resonant circuit
First electric capacity.
3. wave filter as claimed in claim 2, wherein this first electricity in this first series resonant circuit
Electronasty connects this second electric capacity in this first antiresonant circuit and this second inductance, and this second string
This second electric capacity that this first inductance in connection resonance circuit is electrically connected with in this second antiresonant circuit
With this second inductance.
4. wave filter as claimed in claim 3, wherein the 3rd inductance, this first second connects with this
These first electric capacity in resonance circuit and these first inductance and this first with this second parallel resonance
These second electric capacity in circuit and these second inductance are all chip type component.
5. wave filter as claimed in claim 1, wherein this first energy-storage travelling wave tube is one the 3rd electric capacity, should
First end of the 3rd electric capacity is electrically connected with this input and this first electricity in this first series resonant circuit
Feel, and the second end of the 3rd electric capacity is electrically connected with this outfan and being somebody's turn to do in this second series resonant circuit
First inductance.
6. wave filter as claimed in claim 5, wherein this first electricity in this first series resonant circuit
Hold this second electric capacity and this second inductance being electrically connected with in this first antiresonant circuit, and this second string
This second electric capacity that this first electric capacity in connection resonance circuit is electrically connected with in this second antiresonant circuit
With this second inductance.
7. wave filter as claimed in claim 6, wherein the 3rd electric capacity, this first second connects with this
These first electric capacity in resonance circuit and these first inductance and this first with this second parallel resonance
These second electric capacity in circuit and these second inductance are all chip type component.
8. wave filter as claimed in claim 1, also includes:
One second energy-storage travelling wave tube, its first end is electrically connected with this first energy-storage travelling wave tube, this second energy-storage travelling wave tube
The second end be electrically connected with this input or this outfan；
One the 3rd series resonant circuit；And
One the 3rd antiresonant circuit, wherein the 3rd series resonant circuit and the 3rd antiresonant circuit
Repeatedly it is connected between the second end of this second energy-storage travelling wave tube and this earth terminal, and in order to increase the rank of this wave filter
Number.
9. wave filter as claimed in claim 1, also includes:
One the 3rd series resonant circuit, is electrically connected with this input；And
One the 4th series resonant circuit, is electrically connected with this outfan, and wherein this wave filter is by the 3rd string
Connection resonance circuit filters the signal in a filtered band with the 4th series resonant circuit.
10. wave filter as claimed in claim 9, wherein the 3rd series resonant circuit and the 4th string
Connection resonance circuit each includes an inductance and an electric capacity.
11. 1 kinds of radio communication devices, including:
One first transceiver, is electrically connected with a first antenna by least one first signal end；
One second transceiver, is electrically connected with one second antenna by least one secondary signal end；
One first wave filter, including one first passband and one first stopband, and be arranged on this at least one first
Between signal end and this first antenna；And
One second wave filter, including one second passband and one second stopband, and be arranged on this at least one second
Between signal end and this second antenna, wherein this first passband is identical with this second stopband, and this first resistance
Carry identical with this second passband, and this first wave filter and this second wave filter each have an input with
One outfan, and each include:
One first energy-storage travelling wave tube, is electrically connected between this input and this outfan；
One first and one second series resonant circuit, each includes one first electric capacity and one being serially connected
One inductance；And
One first and one second antiresonant circuit, each includes one second electric capacity parallel with one another and one
Two inductance, wherein this first series resonant circuit and this first antiresonant circuit are repeatedly connected on this first energy storage
Between first end and an earth terminal of element, this second series resonant circuit and this second antiresonant circuit
Repeatedly it is connected between the second end of this first energy-storage travelling wave tube and this earth terminal.
12. radio communication devices as claimed in claim 11, wherein this at least one first signal end includes
One first transmitting terminal and one first receiving terminal, and this radio communication device also includes:
One first switch, has one first end to one the 3rd end, and the first end of this first switch is electrically connected with
This first antenna, the second end of this first switch is electrically connected with this first receiving terminal；And
One first power amplifier, with this first filters in series at this first transmitting terminal and this first switch
The 3rd end between, wherein this first transceiver by this first switch first end be conducted to this first switch
The second end or the 3rd end.
13. radio communication devices as claimed in claim 12, also include:
One the 3rd wave filter, identical with the circuit structure of this first wave filter, and it is inserted in this first reception
Between second end of end and this first switch.
14. radio communication devices as claimed in claim 12, wherein this at least one secondary signal end includes
One second transmitting terminal and one second receiving terminal, and this radio communication device also includes:
One second switch, has one first end to one the 3rd end, and the first end of this second switch is electrically connected with
This second antenna, the second end of this second switch is electrically connected with this second receiving terminal；And
One second power amplifier, with this second filters in series at this second transmitting terminal and this second switch
The 3rd end between, wherein the first end of this second switch is conducted to this second switch by this second transceiver
The second end or the 3rd end.
15. radio communication devices as claimed in claim 14, also include:
One the 3rd wave filter, identical with the circuit structure of this second wave filter, and it is inserted in this second reception
Between end and the second end of this second switch.
16. radio communication devices as claimed in claim 11, wherein in this first wave filter this first
Energy-storage travelling wave tube is one the 3rd inductance, and it is defeated that the first end of the 3rd inductance is electrically connected with this of this first wave filter
Enter end and this first electric capacity in this first series resonant circuit of this first wave filter, and the 3rd inductance
The second end be electrically connected with this of this outfan of this first wave filter and this first wave filter and second connect
This first electric capacity in resonance circuit.
17. radio communication devices as claimed in claim 16, wherein in this second wave filter this first
Energy-storage travelling wave tube is one the 3rd electric capacity, and it is defeated that the first end of the 3rd electric capacity is electrically connected with this of this second wave filter
Enter end and this first inductance in this first series resonant circuit of this second wave filter, and the 3rd electric capacity
The second end be electrically connected with this of this outfan of this second wave filter and this second wave filter and second connect
This first inductance in resonance circuit.
18. radio communication devices as claimed in claim 17, wherein the 3rd inductance, the 3rd electric capacity,
These first electric capacity in this first wave filter and this second wave filter and these first inductance and this
One wave filter is all chip-shaped unit with these second electric capacity in this second wave filter and these second inductance
Part.
19. radio communication devices as claimed in claim 11, wherein this first wave filter and this second filter
Ripple device the most also includes:
One second energy-storage travelling wave tube, its first end is electrically connected with this first energy-storage travelling wave tube, this second energy-storage travelling wave tube
The second end be electrically connected with this outfan；
One the 3rd series resonant circuit is identical with the circuit structure of this first series resonant circuit；And
One the 3rd antiresonant circuit, identical with the circuit structure of this first antiresonant circuit, wherein should
3rd series resonant circuit and the 3rd antiresonant circuit are repeatedly connected on the second end of this second energy-storage travelling wave tube
And between this earth terminal.
20. radio communication devices as claimed in claim 11, wherein this first wave filter and this second filter
Ripple device the most also includes:
One the 3rd series resonant circuit, is electrically connected with this input；And
One the 4th series resonant circuit, is electrically connected with this outfan, wherein the 3rd series resonant circuit with
4th series resonant circuit is in order to filter 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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| CN106160689A true CN106160689A (en) | 2016-11-23 |
| CN106160689B CN106160689B (en) | 2018-09-04 |
Family
ID=57336205
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116667805A (en) * | 2023-07-21 | 2023-08-29 | 荣耀终端有限公司 | Resonant structure, radio frequency system and electronic equipment |
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| US20040246074A1 (en) * | 2003-02-20 | 2004-12-09 | Tdk Corporation | Multi-mode filter |
| 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 |
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|---|---|
| CN106160689B (en) | 2018-09-04 |
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