CN106898851B - Hybrid electromagnetic based on half module substrate integrated wave guide couples duplexer - Google Patents
Hybrid electromagnetic based on half module substrate integrated wave guide couples duplexer Download PDFInfo
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- CN106898851B CN106898851B CN201710138609.9A CN201710138609A CN106898851B CN 106898851 B CN106898851 B CN 106898851B CN 201710138609 A CN201710138609 A CN 201710138609A CN 106898851 B CN106898851 B CN 106898851B
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- minor matters
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- circuit minor
- filter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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Abstract
The invention discloses a kind of, and the hybrid electromagnetic based on half module substrate integrated wave guide couples duplexer.The duplexer includes: medium substrate, it is set to the metal ground plane of medium substrate lower surface, it is set to the upper metal layer of medium substrate upper surface, it is respectively input port, low-frequency range branching filter output port, high band branching filter output port that metal layer, which includes first~third port, on this；The upper metal layer setting low-pass filter and high pass band filter of the medium substrate, and the two parallel connection forms hybrid electromagnetic and couples duplexer；For each branching filter by a pair of symmetrical open circuit minor matters line of one and half mode structures connection, the end of each open-circuit minor matters line is parallel open circuit coupling line；One column plated-through hole is set between low-pass filter and high pass band filter, the column plated-through hole equidistantly distributed and run through medium substrate.The present invention has the characteristics that size is small, integrated level is high, isolation is good, has the advantages of simple structure and easy realization.
Description
Technical field
The present invention relates to hybrid electromagnetics to couple duplexer technical field, specifically a kind of to be based on half module substrate integrated wave guide
(HMSIW) hybrid electromagnetic couples duplexer.
Background technique
Wireless communication be information propagate carrier, the medium that electromagnetic wave transmits in space as information, appearance so that
People get rid of the limitation of conducting wire, are the primary great leaps in human society history.With the continuous improvement of productivity level,
The mankind are also growing day by day to the technical requirements of communication system.Duplexer is grown up on the basis of filter, simply
Say that duplexer is exactly a kind of exclusively for a kind of Films In Passive Microwave Devices designed when solving transmit-receive sharing common antenna.
Duplexer is generally divided into two types: transmit-receive switch and frequency range duplexer.Transmit-receive switch is mainly used for being time-multiplexed
Radar system in, when emitting pulse antenna connect transmitter, disconnect receiver；After the completion of emitting pulse, antenna is connect
Receipts machine disconnects transmitter.Frequency range duplexer is that the signal of different frequency range is emitted and received respectively by same common antenna,
Reliability can be improved in radar and the communication technology in it, and to improving for anti-interference and privacy degrees, effect is more prominent,
Therefore frequency range duplexer, which possesses, is more widely applied range, can be used for microwave radio relay communication, satellite communication, microwave measurement etc..
But the existing generally existing stopband harmonic inhibition capability of duplexer is poor, the disadvantage that size is big, integrated level is low.
Summary of the invention
That the purpose of the present invention is to provide a kind of integrated levels is high, small in size, isolation is high, structure is simple, is easy to implement
For the duplexer of receiving and transmitting signal to be isolated.
The technical solution for realizing the aim of the invention is as follows: a kind of hybrid electromagnetic coupling based on half module substrate integrated wave guide
Duplexer, including medium substrate are set to the metal ground plane of medium substrate lower surface, are set to the upper of medium substrate upper surface
Metal layer, metal layer includes first port, second port and third port on this, and wherein first port is input port, and second
Port is low-frequency range branching filter output port, and third port is high band branching filter output port；
The upper metal layer setting low-pass filter and high pass band filter of the medium substrate, and the two parallel connection formed it is mixed
Close electromagnetic coupling duplexer；The upper metal layer setting is half as made of the first open circuit minor matters line and the second open circuit minor matters line load
Mould substrate integrated wave guide structure, low-pass filter include a pair of symmetrical first open circuit minor matters line of one and half mode structures connection,
High pass band filter includes a pair of symmetrical second open circuit minor matters line of one and half mode structures connection, the end of each open-circuit minor matters line
End is parallel open circuit coupling line, and the first open circuit minor matters line and the second open circuit minor matters line share a symmetry axis, and this is right
Axis is claimed to be parallel to open circuit coupling line；One column plated-through hole, column gold are set between low-pass filter and high pass band filter
Categoryization through-hole equidistantly distributed and run through medium substrate.
Further, the length of the first open circuit minor matters line and the second open circuit minor matters line is different, the first open circuit minor matters line
1/4 wavelength at corresponding low-pass filter centre frequency, the second open circuit minor matters line correspond at upper passband filter centre frequency
1/4 wavelength, it is described first open circuit minor matters line and second open circuit minor matters line control respectively low-pass filter and upper passband filtering
The centre frequency of device.
Further, in the half module substrate integrated wave guide structure first open circuit minor matters line and second open circuit minor matters line knot
Structure can be adjusted: the length and width by changing the first open circuit minor matters line and the second open circuit minor matters line, to change lower passband filter
The centre frequency of wave device, high pass band filter；By changing the first open circuit minor matters line and the second open circuit minor matters line length and opening
Spacing between the coupling line of road changes the piezoelectric coupling strength of low-pass filter, high pass band filter.
Further, first incoming feeder, the second incoming feeder, the first output feeder and the second output feeder are
50 ohm microstrips；The diameter d of plated-through hole is 0.6mm, and the pitch of holes p of plated-through hole is 1mm.
Further, the length of first incoming feeder corresponds to 1/4 wave at upper passband branching filter centre frequency
It is long；The length of second incoming feeder corresponds to 1/4 wavelength at upper passband branching filter centre frequency.
Compared with prior art, the present invention its remarkable advantage is: (1) increasing road using the substrate integration wave-guide of half mode structure
The structure of minor matters coupling line effectively reduces the volume of duplexer；(2) using open circuit minor matters parallel coupled line, pass through adjusting
The distance between the length of coupling line and parallel coupled line are electrically coupled to adjust, and the length and width for adjusting HMSIW adjusts magnetic coupling, change
Become hybrid coupled and changes the isolation that the position of zero point inhibits harmonic wave to improve duplexer；(3) this is made using novel structure
The insertion loss of invention is small, and return loss has excellent selectivity due to -20dB.
The invention will be described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the superstructure figure of the hybrid electromagnetic coupling duplexer based on half module substrate integrated wave guide.
Fig. 2 is the stereoscopic schematic diagram of the hybrid electromagnetic coupling duplexer based on half module substrate integrated wave guide.
Fig. 3 is that 1.5~3.5GHz frequency response of the hybrid electromagnetic coupling duplexer based on half module substrate integrated wave guide is special
Linearity curve figure.
Fig. 4 is that 1~7GHz frequency response characteristic of the hybrid electromagnetic coupling duplexer based on half module substrate integrated wave guide is bent
Line chart.
Specific embodiment
In conjunction with Fig. 1~2, the present invention is based on the hybrid electromagnetics of half module substrate integrated wave guide to couple duplexer, including medium base
Plate 1 is set to the metal ground plane 2 of 1 lower surface of medium substrate, is set to the upper metal layer of 1 upper surface of medium substrate, gold on this
Belonging to layer includes first port 3, second port 6 and third port 7, and wherein first port 3 is input port, and second port 6 is low
Frequency range branching filter output port, third port 7 are high band branching filter output port；
Low-pass filter a and high pass band filter b, and the two parallel connection shape is arranged in the upper metal layer of the medium substrate 1
Duplexer is coupled at hybrid electromagnetic；The upper metal layer setting by the first open circuit minor matters line 5 and the second open circuit minor matters line 9 load and
At half module substrate integrated wave guide structure, low-pass filter a includes a pair of symmetrical first open circuit of one and half mode structures connection
Minor matters line 5, high pass band filter b include a pair of symmetrical second open circuit minor matters line 9 of one and half mode structures connection, each open-circuit
The end of minor matters line is parallel open circuit coupling line, and the first open circuit minor matters line 5 and shared one of the second open circuit minor matters line 9 are right
Claim axis, and the symmetry axis is parallel to open circuit coupling line；One column metal is set between low-pass filter a and high pass band filter b
Change through-hole 8,8 equidistantly distributed of column plated-through hole and run through medium substrate 1.
Further, the first open circuit minor matters line 5 is different with the length of the second open circuit minor matters line 9, the first open circuit minor matters
1/4 wavelength at the corresponding low-pass filter a centre frequency of line 5, the second corresponding center high pass band filter b of open circuit minor matters line 9
1/4 wavelength at frequency, the first open circuit minor matters line 5 and the second open circuit minor matters line 9 control low-pass filter a and height respectively
The centre frequency of pass filter b.
Further, the first open circuit minor matters line 5 and the second open circuit minor matters line 9 in the half module substrate integrated wave guide structure
Structure can be adjusted: the length and width by changing the first open circuit minor matters line 5 and the second open circuit minor matters line 9, to change low pass
The centre frequency of band filter a, high pass band filter b；It is long by changing the first open circuit minor matters line 5 and the second open circuit minor matters line 9
Spacing between degree and open circuit coupling line changes the piezoelectric coupling strength of low-pass filter a, high pass band filter b.
Further, first incoming feeder 4, the second incoming feeder 10, the first output feeder 6 and the second output feeder
7 be 50 ohm microstrips；The diameter d of plated-through hole 8 is 0.6mm, and the pitch of holes p of plated-through hole is 1mm.
Further, the length of first incoming feeder 4 corresponds to 1/4 at upper passband branching filter a centre frequency
Wavelength；The length of second incoming feeder 10 corresponds to 1/4 wavelength at upper passband branching filter a centre frequency.
The coupling unit of above-mentioned open circuit minor matters adjusts being electrically coupled for branching filter；The width of half module substrate integrated wave guide structure
The magnetic coupling of degree and length adjustment branching filter, branch bandpass filter introduce hybrid electromagnetic coupling to obtain in high stop band
To more zero points.Meanwhile a quarter matching of one section of another branching filter of having connected before each branching filter is negative
Transmission line is carried to improve the isolation of duplexer.
To sum up, half module substrate integrated wave guide of the present invention efficiently reduces the volume of each branching filter, to reduce
The overall dimensions of duplexer.Connection half module substrate integrated wave guide is two open circuit minor matters lines, the end of two open circuit minor matters lines
It is placed in parallel and is equivalent to a new coupled capacitor, produce and be electrically coupled, be mutually mixed with the magnetic coupling in half mode structure, it can
Make to generate new zero point on the stopband of branching filter the isolation that the duplexer is improved with this.
Embodiment 1
The present invention uses dielectric thickness for the Rogers RT5880 plate of 0.508mm, dielectric constant 2.2.In conjunction with Fig. 1
~2, the present invention is based on the hybrid electromagnetic of half module substrate integrated wave guide couple duplexer, by metal ground plane 2, medium substrate 1, on
Metal layer up of three-layer, wherein forming the base of one and half mode structures by the connection metal ground plane 2 of plated-through hole 8 and upper metal layer
Piece integrated waveguide.Each branching filter is made of a pair of symmetrical open circuit minor matters of one and half mode structures connection, this open-circuit branch
Parallel open circuit coupling line is introduced in the end of nodel line, is equivalent to a capacitor, between the length and coupling line that adjust coupling line
Size away from adjustable capacitor controls the position of the zero point of branching filter with this, finely tunes the resonance frequency of filter.Point
The centre frequency of branch filter is determined that the branching filter of upper and lower channel is by the identical list of structure by the length of open circuit minor matters line
Member composition.The different branching filter of the two centre frequencies is together in parallel by a T junction, so that upper and lower passband is defeated
It does not influence each other out, the duplexer of structure as shown in the figure is just made.
Connect two branching filters is a T junction, which is divided equally input signal using 50 Ω transmission lines
For two-way, it is respectively fed in the filter of two different passbands.Wherein, concatenated 50 Ω in the front end of lower passband branching filter is passed
The length of defeated line is λ2/4(λ1Refer to the corresponding guide wavelength of the centre frequency of low-band branch filter, λ2Refer to high frequency band point
The corresponding guide wavelength of the centre frequency of branch filter)；Similarly, the concatenated 50 Ω transmission line in the front end of upper passband branching filter
Length be λ1/4.What is designed in this way be principle is that guided wave is become opening a way behind λ/4 from short circuit, and being designed in this way can be further
Improve isolation.
In conjunction with Fig. 3,4, it can be seen that the passband of the design distinguishes 2.35~2.46GHz and 2.82~3.00GHz, selects
Rogers RT 5880 is medium, dielectric constant 2.2.Dielectric thickness is 0.508mm.Insertion loss in passband is lower than 2dB,
Return loss is better than -20dB, and size is only 30.5mm*34mm.Isolation is greater than -25dB.As Fig. 1 adjusts opening for dual-mode resonator
The l of road minor matters3Length can change the centre frequency of filter, (l1+l2+l3) length determine the centre frequency of filter,
Because changing being electrically coupled for filter if the length changed is to change the length of coupling line, the band of filter can be changed
Wide and position of zero point etc., as long as so adjusting l in the centre frequency for changing filter merely1Length, make its center frequency
Rate is moved on the stopband of low-pass filter.By adjusting l3Length and the adjustable branching filter of interval S electricity
Coupling, then, is finely adjusted the length and spacing of parallel coupled line, design complete middle frequency as shown in the figure be 2.41GHz,
2.91GHz bandpass filter.The design parameter of the present embodiment is as follows: l1=12.5mm, l2=3.275mm, l3=6.1, s1=
0.65mm,l1'=10.5mm, l2'=0.3375mm, l3'=4mm, s2=0.45mm, w=8.8mm, a1=a2=3.2mm.
This example is emulated using the full-wave electromagnetic simulation software HFSS of ANSYS company, frequency response curve such as Fig. 3,4
Shown, passband distinguishes 2.35~2.46GHz and 2.82~3.00GHz, and the insertion loss in passband is lower than 2dB, and return loss is excellent
In -20dB, size is only 30.5mm*34mm.Isolation is greater than -25dB.Meet design objective, meets application request.This
Invention
It introduces electromagnetism hybrid coupled and introduces new zero point, increase the isolation of duplexer, while introducing half-module chip
Integrated wave guide structure, reduces the size of duplexer, and easily facilitates production and manufacture.
Claims (5)
1. a kind of hybrid electromagnetic based on half module substrate integrated wave guide couples duplexer, it is characterised in that: including medium substrate
(1), it is set to the metal ground plane (2) of medium substrate (1) lower surface, is set to the upper metal layer of medium substrate (1) upper surface,
Metal layer includes first port (3), second port (6) and third port (7) on this, and wherein first port (3) is input port,
Second port (6) is low-frequency range branching filter output port, and third port (7) is high band branching filter output port；
Upper metal layer setting low-pass filter (a) of the medium substrate (1) and high pass band filter (b), and the two is in parallel
It forms hybrid electromagnetic and couples duplexer；The upper metal layer setting is by the first open circuit minor matters line (5) and the second open circuit minor matters line (9)
Half module substrate integrated wave guide structure made of load, low-pass filter (a) include that the connection of one and half mode structures is a pair of symmetrical
First open circuit minor matters line (5), high pass band filter (b) include a pair of symmetrical second open circuit minor matters line of one and half mode structures connection
(9), the end of each open-circuit minor matters line is parallel open circuit coupling line, first open circuit minor matters line (5) and the second open circuit
Minor matters line (9) shares a symmetry axis, and the symmetry axis is parallel to open circuit coupling line；Low-pass filter (a) and upper passband are filtered
One column plated-through hole (8) is set between wave device (b), column plated-through hole (8) equidistantly distributed and run through medium substrate
(1).
2. the hybrid electromagnetic according to claim 1 based on half module substrate integrated wave guide couples duplexer, it is characterised in that:
First open circuit minor matters line (5) is different with the second open circuit length of minor matters line (9), the corresponding low pass of the first open circuit minor matters line (5)
1/4 wavelength at band filter (a) centre frequency, corresponding high pass band filter (b) centre frequency of the second open circuit minor matters line (9)
Place 1/4 wavelength, it is described first open circuit minor matters line (5) and second open circuit minor matters line (9) respectively control low-pass filter (a) with
The centre frequency of high pass band filter (b).
3. the hybrid electromagnetic according to claim 1 or 2 based on half module substrate integrated wave guide couples duplexer, feature exists
In: the structure of the first open circuit minor matters line (5) and the second open circuit minor matters line (9) can be adjusted in the half module substrate integrated wave guide structure
Section: the length and width by changing the first open circuit minor matters line (5) and the second open circuit minor matters line (9), to change lower passband filtering
The centre frequency of device (a), high pass band filter (b)；By changing the first open circuit minor matters line (5) and the second open circuit minor matters line (9)
Spacing between length and open circuit coupling line come change low-pass filter (a), high pass band filter (b) be electrically coupled it is strong
Degree.
4. the hybrid electromagnetic according to claim 1 or 2 based on half module substrate integrated wave guide couples duplexer, feature exists
In: the first incoming feeder (4), the second incoming feeder (10), the first output feeder (6) and the second output feeder (7) they are 50 Europe
Nurse microstrip line；The diameter of plated-through hole (8)dFor 0.6mm, the pitch of holes of plated-through holepFor 1mm.
5. the hybrid electromagnetic according to claim 1 or 2 based on half module substrate integrated wave guide couples duplexer, feature exists
In: the length of the first incoming feeder (4) corresponds to 1/4 wavelength at upper passband branching filter (a) centre frequency；Second input feedback
The length of line (10) corresponds to 1/4 wavelength at upper passband branching filter (a) centre frequency.
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| CN201710138609.9A CN106898851B (en) | 2017-03-09 | 2017-03-09 | Hybrid electromagnetic based on half module substrate integrated wave guide couples duplexer |
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| CN201710138609.9A CN106898851B (en) | 2017-03-09 | 2017-03-09 | Hybrid electromagnetic based on half module substrate integrated wave guide couples duplexer |
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| CN106898851B true CN106898851B (en) | 2019-04-16 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109273809A (en) * | 2018-09-06 | 2019-01-25 | 西安电子科技大学 | Substrate integrated waveguide quasi ellipse bandpass filter based on source and load coupling |
| CN110957553A (en) * | 2019-12-27 | 2020-04-03 | 华勤通讯技术有限公司 | Filter |
| CN112310583B (en) * | 2020-10-15 | 2022-03-25 | 上海海事大学 | T-shaped dual-mode resonator-based three-passband filter |
| CN112736382B (en) * | 2020-12-25 | 2021-12-03 | 电子科技大学 | Switchable reconfigurable duplexer/band-pass filter |
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| CN103633400A (en) * | 2013-11-19 | 2014-03-12 | 华南理工大学 | Electromagnetic hybrid coupling-based micro-strip duplexer |
| CN104681900A (en) * | 2015-03-06 | 2015-06-03 | 西安电子科技大学 | High-isolation duplexer with coupled electromagnetic shunt |
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