CN107611532A - A kind of capacitive load type all-pass filter - Google Patents
A kind of capacitive load type all-pass filter Download PDFInfo
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- CN107611532A CN107611532A CN201710717995.7A CN201710717995A CN107611532A CN 107611532 A CN107611532 A CN 107611532A CN 201710717995 A CN201710717995 A CN 201710717995A CN 107611532 A CN107611532 A CN 107611532A
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Abstract
The invention discloses a kind of capacitive load type all-pass filter, by a digital phase shifter WYD and a wave filter group into.Using LTCC Technology, digital phase shifter is integrated on wave filter to realize function.The present invention realizes a kind of phase shifting accuracy height, and Insertion Loss is smaller, excellent electrical property, the stable new construction capacitive load type all-pass filter of temperature performance.Can be applied to radar, electronic warfare etc. has the occasion of rigors and corresponding system to volume, electrical property, temperature stability and reliability.
Description
Technical field
The invention belongs to microwave technical field, and in particular to a kind of capacitive load type all-pass filter.
Background technology
In recent years, the field such as commercial communication, military wireless telecommunications develops rapidly so that electronic system constantly upgrades, electronics
Device miniaturization, integrated, the high advantages such as batch machining that are easy to of stability turn into current production trend.With low temperature co-fired pottery
Numerous kinds passive device such as wave filter, coupler, duplexer, power splitter etc. based on porcelain technology have been supplied in many national defence
In tip device, and the growth momentum of the passive device of integrated active chip also can be more and swifter and more violent
LTCC is a kind of Electronic Encapsulating Technology, using multi-layer ceramics technology, passive element can be built in into medium
Inside substrate.LTCC technology suffers from batch production, integration packaging, high-quality, flexible design and high frequency performance etc.
Obvious advantage, it has also become the mainstream technology of passive integration.It has high q-factor, is easily integrated active chip, thermal diffusivity is good, surely
Qualitative height, the advantages that high temperature resistant, using LTCC technology, it can preferably process that size is small, and precision is high, and tight type is good, loss
Small microwave device.
The content of the invention
The present invention is directed to propose a kind of capacitive load type all-pass filter, using LTCC Technology, realizes volume
It is small, in light weight, reliability is high, excellent electrical property, the all-pass filter that batch uniformity is good, cost is low, temperature performance is stable.
To achieve the above object, the present invention uses following technical scheme：
A kind of capacitive load type all-pass filter, including a digital phase shifter WYD and a wave filter, all-pass filter it is upper
Surface mount has numerical control attenuation chips W YD, chip input line Rin and chip output line Rout, and the side of attentuating filter is patch
Input port P1 equipped with 50 ohmages, opposite side are the output port P2 for being pasted with 50 ohmages, all-pass filter
Front side mounts ground plane GND1, and the rear side of all-pass filter is pasted with digital phase shift chips W YD voltage control successively from left to right
End interface P3 processed, end interface P4 is controlled, controls end interface P5, control end interface P6, control end interface P7, control end interface P8,
End interface P9 is controlled, controls end interface P10, controls end interface P11, controls end interface P12, controls end interface P13, rightmost is
Grounding ports GND2.
Capacitive load mode filter terminates defeated under metal column H5, upper chip termination output line Rout including wave filter left end
Enter inductance Lin.Also the first ladder capacitive load ladder resonance impedance unit, second-order capacitive load ladder resonance impedance unit,
Between three rank capacitive load ladder resonance impedance units, fourth order capacitive load ladder resonance impedance unit, outputting inductance Lout, Z-shaped level
Cross-couplings banding line Z1,50 ohms impedance match output port P2, the staircase resonant impedance capacitance loading wave filter are located at
In one 4 layers of circuit substrate, 4 layers of circuit substrate is sequentially provided with the first loading capacitance layer, the second staircase resonant from top to bottom
Impedance stripline layer, the 3rd cross-couplings banding line layer, the 4th loading capacitance layer.
First capacitive load staircase resonant unit adds including the first staircase resonant impedance stripline T1, metal column H1, first
Carrying electric capacity C1, the first staircase resonant impedance stripline T1 includes strip line T11 and strip line T12, wherein strip line T11 width
More than strip line T12 width, strip line T12 front ends ground connection, strip line T11 ends at the top of metal column H1 with being connected, metal column
H1 bottoms are connected with the first loading capacitance C1, and the first capacitive load staircase resonant unit passes through strip line T11 ends and input electricity
Feel Lin connections.
Second capacitive load staircase resonant unit adds including the second ladder resonance impedance strip line T2, metal column H2, second
Carrying electric capacity C2, the second ladder resonance impedance strip line T2 includes strip line T21 and strip line T22, wherein strip line T21 width
Less than strip line T22 width, strip line T21 rear ends ground connection, strip line T22 front ends are connected with metal column H2 bottoms, metal column
It is connected at the top of H2 with the second loading capacitance C2.
3rd capacitive load staircase resonant unit adds including the 3rd staircase resonant impedance stripline T3, metal column H3, the 3rd
Carrying electric capacity C3, the 3rd staircase resonant impedance stripline T3 includes strip line T31 and strip line T32, wherein strip line T31 width
Less than strip line T32 width, strip line T31 rear ends ground connection, strip line T32 front ends at the top of metal column H3 with being connected, metal column
H3 bottoms are connected with the 3rd loading capacitance C3.
4th capacitive load staircase resonant unit adds including fourth order ladder resonance impedance strip line T4, metal column T4, the 4th
Electric capacity C4 is carried, fourth order ladder resonance impedance strip line T4 includes strip line T41 and strip line T42, wherein strip line T42 width
Less than strip line T41 width, strip line T42 front ends ground connection, strip line T41 rear ends are connected with metal column H4 bottoms, metal column
It is connected at the top of H4 with the 4th loading capacitance C4, the 4th capacitive load staircase resonant unit passes through strip line T41 ends and output electricity
Feel Lout connections.
The strip line T11, strip line T22, strip line T32, strip line T41 Length x Widths are equal, the strip line
T12, strip line T21, strip line T31, strip line T42 Length x Widths are equal, the second loading capacitance C2, the 4th loading capacitance C4
Above staircase resonant impedance striplines at different levels, the first loading capacitance C1, the 3rd loading capacitance C3 are located at staircase resonants at different levels
Below impedance stripline.Cross-couplings banding line Z1 is located at below staircase resonant impedance striplines at different levels between the first Z-shaped level,
Above the first loading capacitance C1, the 3rd loading capacitance C3 layers.
The signal input port P1 and signal output port P2 are the port of 50 ohmages of coplanar waveguide structure；
It is the signal input part P1, the signal output part P2, the voltage controling end P3, the voltage controling end P4, described
Voltage controling end P5, the voltage controling end P6, the voltage controling end P7, the voltage controling end P8, voltage control
Hold P9, the voltage controling end P10, the voltage controling end P11, the voltage controling end P12 and the voltage controling end P13
It is external package leads；
The digital phase shift chips W YD and the wave filter realize that integral type encapsulates by LTCC Technology；
The model WYD020025-6 of the digital phase shift chips W YD modules.It is six bit digital phase shifts of a function admirable
Device, the chip are grounded by back metal via through holes, and the phase shifting accuracy less than 1.5 degree can be provided in 2.0-2.5GHz.
Compared with prior art, its remarkable advantage is the present invention：The present invention uses LTCC Technology, is a kind of body
Product is small, precision is high, Insertion Loss is smaller, stability is good, has the LTCC capacitive load type all-pass filters of two functions, that is, has shifting
The LTCC bandpass filters of phase function, it has high q-factor, is easily integrated active chip.
Brief description of the drawings
Fig. 1 is a kind of structural representation of phase shift chip of the present invention.
Fig. 2 is a kind of structure chart of staircase resonant impedance capacitance loading wave filter of the present invention.
Fig. 3 is the amplitude-versus-frequency curve of the Insertion Loss state output port of staircase resonant impedance capacitance loading wave filter of the present invention.
Embodiment
A kind of capacitive load type all-pass filter of the present invention, including a digital phase shifter chip WYD and a wave filter,
The upper surface of all-pass filter is pasted with digital phase shifter chips W YD, chip input line Rin and chip output line Rout, phase shift
The side of wave filter is the input port P1 for being pasted with 50 ohmages, and opposite side is the output port for being pasted with 50 ohmages
P2, the front side attachment ground plane GND1 of all-pass filter, the rear side of all-pass filter are pasted with digital phase shift successively from left to right
Device chips W YD voltage controling end interface P3, end interface P4 is controlled, control end interface P5, control end interface P6, control end interface
P7, end interface P8 is controlled, control end interface P9, control end interface P10, control end interface P11, control end interface P12, control terminal
Interface P13, rightmost are grounding ports GND2.
Capacitive load type all-pass filter includes the metal column H5 of wave filter left end, upper chip termination output line Rout lower ends
Meet input inductance Lin.Also the first ladder capacitive load ladder resonance impedance unit, second-order capacitive load ladder resonance impedance list
It is member, the 3rd rank capacitive load ladder resonance impedance unit, fourth order capacitive load ladder resonance impedance unit, outputting inductance Lout, Z-shaped
Cross-couplings banding line Z1,50 ohms impedance match output port P2, the staircase resonant impedance capacitance load wave filter between level
It is located in 4 layers of circuit substrate, 4 layers of circuit substrate is sequentially provided with the first loading capacitance layer, the second ladder from top to bottom
Resonance impedance strip line layer, the 3rd cross-couplings banding line layer, the 4th loading capacitance layer.
First capacitive load staircase resonant unit adds including the first staircase resonant impedance stripline T1, metal column H1, first
Carrying electric capacity C1, the first staircase resonant impedance stripline T1 includes strip line T11 and strip line T12, wherein strip line T11 width
More than strip line T12 width, strip line T12 front ends ground connection, strip line T11 ends at the top of metal column H1 with being connected, metal column
H1 bottoms are connected with the first loading capacitance C1, and the first capacitive load staircase resonant unit passes through strip line T11 ends and input electricity
Feel Lin connections.
Second capacitive load staircase resonant unit adds including the second ladder resonance impedance strip line T2, metal column H2, second
Carrying electric capacity C2, the second ladder resonance impedance strip line T2 includes strip line T21 and strip line T22, wherein strip line T21 width
Less than strip line T22 width, strip line T21 rear ends ground connection, strip line T22 front ends are connected with metal column H2 bottoms, metal column
It is connected at the top of H2 with the second loading capacitance C2.
3rd capacitive load staircase resonant unit adds including the 3rd staircase resonant impedance stripline T3, metal column H3, the 3rd
Carrying electric capacity C3, the 3rd staircase resonant impedance stripline T3 includes strip line T31 and strip line T32, wherein strip line T31 width
Less than strip line T32 width, strip line T31 rear ends ground connection, strip line T32 front ends at the top of metal column H3 with being connected, metal column
H3 bottoms are connected with the 3rd loading capacitance C3.
4th capacitive load staircase resonant unit adds including fourth order ladder resonance impedance strip line T4, metal column T4, the 4th
Electric capacity C4 is carried, fourth order ladder resonance impedance strip line T4 includes strip line T41 and strip line T42, wherein strip line T42 width
Less than strip line T41 width, strip line T42 front ends ground connection, strip line T41 rear ends are connected with metal column H4 bottoms, metal column
It is connected at the top of H4 with the 4th loading capacitance C4, the 4th capacitive load staircase resonant unit passes through strip line T41 ends and output electricity
Feel Lout connections.
The strip line T11, strip line T22, strip line T32, strip line T41 Length x Widths are equal, the strip line
T12, strip line T21, strip line T31, strip line T42 Length x Widths are equal, the second loading capacitance C2, the 4th loading capacitance C4
Above staircase resonant impedance striplines at different levels, the first loading capacitance C1, the 3rd loading capacitance C3 are located at staircase resonants at different levels
Below impedance stripline.Cross-couplings banding line Z1 is located at below staircase resonant impedance striplines at different levels between the first Z-shaped level,
Above the first loading capacitance C1, the 3rd loading capacitance C3 layers.
The signal input port P1 and signal output port P2 are the port of 50 ohmages of coplanar waveguide structure；
It is the signal input part P1, the signal output part P2, the voltage controling end P3, the voltage controling end P4, described
Voltage controling end P5, the voltage controling end P6, the voltage controling end P7, the voltage controling end P8, voltage control
Hold P9, the voltage controling end P10, the voltage controling end P11, the voltage controling end P12 and the voltage controling end P13
It is external package leads.
The digital phase shifter chips W YD and the wave filter realize that integral type encapsulates by LTCC Technology.
The model WYD020025-6 of digital phase shift chips W YD modules.It is six bit digital phase shifts of a function admirable
Device, the chip are grounded by back metal via through holes, and the phase shifting accuracy less than 1.5 degree can be provided in 2.0-2.5GHz.
During work, signal is from input P1, and strip line Rin enters digital phase shift chips W YD, then through Rout and metal
Post H5 reaches filter input end first and inputs inductance Lin, and last signal is defeated by output end P2 from the first outputting inductance Lout
Go out.
A kind of size of capacitive load type all-pass filter of the present invention is 8.3mm × 2mm × 1.5mm, its performance
Can as can be seen from Figure 3, the centre frequency of this capacitive load type all-pass filter is 2.35GHz, bandwidth 2.2GHz ~ 2.5GHz, Insertion Loss
In 1.5dB or so, standing wave is in 20dB or so, better performances.
Claims (4)
- A kind of 1. capacitive load type all-pass filter, it is characterised in that：The upper surface of all-pass filter is pasted with digital phase shifter Chips W YD, chip input line (Rin) and chip output line (Rout), the side of all-pass filter are pasted with 50 ohmages Input port (P1), opposite side are pasted with the output port of 50 ohmages（P2）, the front side attachment ground plane of all-pass filter (GND1), the rear side of all-pass filter is pasted with digital phase shifter chips W YD voltage controling end interface (P3), control terminal successively Interface (P4), control end interface (P5), control end interface (P6), control end interface (P7), control end interface (P8), control termination Mouth (P9), control end interface (P10), control end interface（P11）, control end interface（P12）, control end interface（P13）, rear side one Hold as grounding ports（GND2）；Capacitive load type all-pass filter also includes the metal column (H5) of wave filter one end, upper chip termination output line（Rout）, Lower termination input inductance（Lin）；Also include the first ladder capacitive load ladder resonance impedance unit, second-order capacitive load ladder resonance Impedance unit, the 3rd rank capacitive load ladder resonance impedance unit, fourth order capacitive load ladder resonance impedance unit, outputting inductance (Lout), cross-couplings banding line between Z-shaped level（Z1）, 50 ohms impedance match output ports（P2）；The staircase resonant impedance Capacitive load wave filter is located in 4 layers of circuit substrate, and 4 layers of circuit substrate are sequentially provided with the first loading capacitance from top to bottom Layer, the second ladder resonance impedance strip line layer, the 3rd cross-couplings banding line layer, the 4th loading capacitance layer；First capacitive load staircase resonant unit includes the first staircase resonant impedance stripline（T1）, metal column（H1）, first plus Carry electric capacity（C1）, the first staircase resonant impedance stripline（T1）Including strip line one（T11）With strip line two（T12）, wherein band Shape line one（T11）Width be more than strip line two（T12）Width, strip line two（T12）Front end is grounded, strip line one（T11） End and metal column（H1）Top connects, metal column（H1）Bottom and the first loading capacitance（C1）Connection, the first capacitive load rank Terraced resonant element passes through strip line one（T11）End and input inductance（Lin）Connection；Second capacitive load staircase resonant unit includes the second ladder resonance impedance strip line（T2）, metal column（H2）, second plus Carry electric capacity（C2）, the second ladder resonance impedance strip line（T2）Including strip line three（T21）With four strip lines（T22）, wherein band Shape line three（T21）Width be less than strip line four（T22）Width, strip line three（T21）Rear end is grounded, strip line four（T22） Front end and metal column（H2）Bottom connects, metal column（H2）Top and the second loading capacitance（C2）Connection；3rd capacitive load staircase resonant unit includes the 3rd staircase resonant impedance stripline（T3）, metal column（H3）, the 3rd plus Carry electric capacity（C3）, the 3rd staircase resonant impedance stripline（T3）Including strip line five（T31）With strip line six（T32）, wherein band Shape line five（T31）Width be less than strip line six（T32）Width, strip line five（T31）Rear end is grounded, strip line six（T32） Front end and metal column（H3）Top connects, metal column（H3）Bottom and the 3rd loading capacitance（C3）Connection；4th capacitive load staircase resonant unit includes fourth order ladder resonance impedance strip line（T4）, metal column（T4）, the 4th plus Carry electric capacity（C4）, fourth order ladder resonance impedance strip line（T4）Including strip line seven（T41）With strip line eight（T42）, wherein band Shape line（T42）Width be less than strip line seven（T41）Width, strip line eight（T42）Front end is grounded, strip line seven（T41）Afterwards End and metal column（H4）Bottom connects, metal column（H4）Top and the 4th loading capacitance（C4）Connection, the 4th capacitive load ladder Resonant element passes through strip line seven（T41）End and outputting inductance（Lout）Connection；Strip line one（T11）, strip line four（T22）, strip line six（T32）, strip line seven（T41）Length x Width is equal, band Shape line two（T12）, strip line three（T21）, strip line five（T31）, strip line eight（T42）Length x Width is equal, the second loading Electric capacity（C2）, the 4th loading capacitance（C4）Above staircase resonant impedance striplines at different levels, the first loading capacitance（C1）, the 3rd Loading capacitance（C3）Below staircase resonant impedance striplines at different levels；Cross-couplings banding line between first Z-shaped level（Z1）It is located at Below staircase resonant impedance striplines at different levels, positioned at the first loading capacitance（C1）, the 3rd loading capacitance（C3）Layer top.
- 2. capacitive load type all-pass filter as claimed in claim 1, it is characterised in that：The signal input part（P1）, letter Number output end（P2）, voltage controling end（P3）, voltage controling end（P4）, voltage controling end（P5）, voltage controling end（P6）, voltage Control terminal（P7）, voltage controling end（P8）, voltage controling end（P9）, voltage controling end（P10）, voltage controling end（P11）, voltage Control terminal（P12）And voltage controling end（P13）It is external package leads.
- 3. capacitive load type all-pass filter as claimed in claim 1, it is characterised in that：The digital phase shifter chips W YD Realize that integral type encapsulates by LTCC Technology with the wave filter.
- 4. capacitive load type all-pass filter as claimed in claim 1, it is characterised in that：Digital phase shift chips W YD modules Model WYD020025-6, the chip are grounded by back metal via through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717995.7A CN107611532A (en) | 2017-08-21 | 2017-08-21 | A kind of capacitive load type all-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717995.7A CN107611532A (en) | 2017-08-21 | 2017-08-21 | A kind of capacitive load type all-pass filter |
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| Publication Number | Publication Date |
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| CN107611532A true CN107611532A (en) | 2018-01-19 |
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| CN201710717995.7A Pending CN107611532A (en) | 2017-08-21 | 2017-08-21 | A kind of capacitive load type all-pass filter |
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Citations (6)
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|---|---|---|---|---|
| US20150155848A1 (en) * | 2012-08-24 | 2015-06-04 | Murata Manufacturing Co., Ltd. | High-frequency device and directional coupler |
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| CN106129546A (en) * | 2016-08-28 | 2016-11-16 | 戴永胜 | A kind of C-band digital phase shift wave filter |
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| CN206059596U (en) * | 2016-08-28 | 2017-03-29 | 戴永胜 | A kind of C-band digital phase shift wave filter |
-
2017
- 2017-08-21 CN CN201710717995.7A patent/CN107611532A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150155848A1 (en) * | 2012-08-24 | 2015-06-04 | Murata Manufacturing Co., Ltd. | High-frequency device and directional coupler |
| CN105762467A (en) * | 2016-04-19 | 2016-07-13 | 戴永胜 | SHF waveband micro dual-bandpass filter |
| CN106129546A (en) * | 2016-08-28 | 2016-11-16 | 戴永胜 | A kind of C-band digital phase shift wave filter |
| CN106159386A (en) * | 2016-08-28 | 2016-11-23 | 戴永胜 | A kind of novel coupling LC filtering phase shifter |
| CN206059595U (en) * | 2016-08-28 | 2017-03-29 | 戴永胜 | A kind of new coupling LC filters the phase shifter |
| CN206059596U (en) * | 2016-08-28 | 2017-03-29 | 戴永胜 | A kind of C-band digital phase shift wave filter |
Non-Patent Citations (1)
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| 刘毅: "LTCC集总滤波器小型化设计与研究", 《电子产品世界》 * |
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Application publication date: 20180119 |