CN110518323A - The not equal function of four frequency bands based on π type minor matters divide Gysel power splitter - Google Patents
The not equal function of four frequency bands based on π type minor matters divide Gysel power splitter Download PDFInfo
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- CN110518323A CN110518323A CN201910718843.8A CN201910718843A CN110518323A CN 110518323 A CN110518323 A CN 110518323A CN 201910718843 A CN201910718843 A CN 201910718843A CN 110518323 A CN110518323 A CN 110518323A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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Abstract
The invention proposes a kind of not equal function of four frequency bands based on π type minor matters to divide Gysel power splitter, it is intended to increase the working band number for not waiting function to divide Gysel power splitter, to adapt to the job requirement of multi-band communication systems；Including medium substrate, the metal base plate of medium substrate lower surface printing, the incoming feeder of upper surface printing, two output feeders and two π type minor matters to connect in mirror symmetry and one end, two respective other ends of π type minor matters are connected with isolation element, between incoming feeder and each output feeder, and it is connected respectively by quarter wavelength impedance transducer between an output feeder and an isolation element, and the width of a quarter wavelength impedance transducer connected between output feeder and incoming feeder, the width of the quarter wavelength impedance transducer connected between another output feeder and isolation element is equal, the width of two quarter wavelength impedance transducers connected between output feeder and incoming feeder differs.
Description
Technical field
The invention belongs to microwaves and radio frequency arts, are related to the not equal function of four frequency bands of one kind and divide Gysel power splitter, specifically relate to
And a kind of not equal function of four frequency bands based on π type minor matters divide Gysel power splitter, can be applied to wireless communication system radio-frequency front-end.
Background technique
Gysel power splitter is a kind of important passive device in microwave radio circuit, has power distribution or combined function
Can, it is improvement structure on the basis of Wilkinson power splitter, is not only able to realize all of the port matching, also passes through introducing
Carrying ground will be isolated to overcome Wilkinson structure to be unable to fully the defect of heat dissipation in load port, thus is widely used in
In the radio circuits such as high power amplifier, frequency mixer and aerial array.
Ratio in energy distribution is different, and Gysel power splitter has equal function point and do not wait function point two types.Equal function point
Gysel power splitter realizes equal power output in each output port.However, in many communication system applications occasions, urgently
It is required that Gysel power splitter is exported with unequal power, especially in an antenna array, not equal function point feed can effectively inhibit antenna mistake
Big minor level saves the attenuator in feeding network, can greatly reduce loss and reduce cost.On the other hand, with
The rapid development of wireless communication improves signal transmission rate, and enhancing system reliability to make full use of frequency spectrum resource,
Double frequency and multi-band communication circuit using more prevalent, it is desirable that Gysel power splitter can be same in multiple frequency bands such as two or more
When work.Multifrequency band structure is introduced into not equal function to divide in Gysel power splitter, can not only meet a variety of of multiband terminal equipment
Function, moreover it is possible to simplify circuit structure, reduce volume, realize the miniaturization of system.Therefore, function are not waited with multiple working bands
The sight for dividing the design of Gysel power splitter to attract more and more scientific research personnel, many scholars put into the not equal function of multiband
Divide in the research and extension of Gysel power splitter.However, function not equal for multiband divide the research of Gysel power splitter main at present
It concentrates on the not equal function of double frequency and divides Gysel power splitter.The design of Gysel power splitter is divided not have also not equal function more than two frequency bands
Other research reports, this greatly limits the using and promoting in wireless communications of Gysel power splitter.
For example, Gai C et al. Microwave and Optical Technology Letters (VOL.59,
NO.10, March 2017) entitled " the Dual band gysel power divider with high power that delivers
The article of dividing ratio " proposes a kind of not equal function of double frequency and divides Gysel power splitter, and the not equal function of the double frequency divide Gysel function
Being divided to device includes three ports, six multi-branch transport lines, three open circuit minor matters and two ground connection isolation resistances, using three open circuit branches
Half wavelength transmission line between section two load ports of substitution, realizes the design of double frequency-band Gysel power splitter.But
Its existing shortcoming is that equal part Gysel power splitter can only not worked at the same time in two frequency ranges for this, do not adapt to three frequency and with
On the job requirement of multifrequency terminal equipment destroy the integrality on metal ground using multiple defect ground structures, structure is more multiple
It is miscellaneous, therefore, it will receive certain limitation in practical applications.
Summary of the invention
It is an object of the invention to overcome the problems of the above-mentioned prior art, a kind of four based on π type minor matters are proposed
The not equal function of frequency band divide Gysel power splitter, it is intended to increase the working band number for not waiting function to divide Gysel power splitter, to adapt to multifrequency
Job requirement with communication system.
To achieve the goals above, the technical solution that the present invention takes includes medium substrate 1, under the medium substrate 1
Surface is printed with metal base plate 2, and it is in mirror symmetry and one end that upper surface, which is printed with 3, two output feeders 4 of incoming feeder and two,
The π type minor matters 5 to connect, two respective other ends of π type minor matters 5 are connected with isolation element 6, the incoming feeder 3 with it is each
Become respectively by quarter-wave impedance between output feeder 4 and between an output feeder 4 and an isolation element 6
Parallel operation 7 connects, and the width of the quarter wavelength impedance transducer 7 connected between an output feeder 4 and incoming feeder 3,
The width of quarter wavelength impedance transducer 7 connected between another output feeder 4 and isolation element 6 is equal, and two
The width of the quarter wavelength impedance transducer 7 connected between output feeder 4 and incoming feeder 3 differs, in which:
The π type minor matters 5, including sequentially connected first transmission line 51, second transmission line 52 and third transmission line 53, In
First transmission line 51 and the link position of second transmission line 52 and the link position of second transmission line 52 and third transmission line 53
Minor matters 54 in parallel are connected separately with, and the other end of two minor matters 54 in parallel is connected by short-circuit micro-band line 55；
The short-circuit micro-band line 55 and isolation element 6 are connect by metallization VIA 8 with metal base plate 2 respectively.
The not equal function of above-mentioned four frequency bands based on π type minor matters divide Gysel power splitter, and the first transmission line 51, second is transmitted
Line 52 and minor matters 54 in parallel, are all made of the quasi- U-shaped structure being made of five straight line micro-strips, the third transmission line 53 using by
The Z-shaped structure of three straight line micro-strips composition, and each straight line micro-strip and each straight line in third transmission line 53 in first transmission line 51
The width of micro-strip is equal, in the first transmission line 51, second transmission line 52, third transmission line 53 and minor matters 54 in parallel, every two
The junction of a straight line micro-strip is provided with corner cut.
The not equal function of above-mentioned four frequency bands based on π type minor matters divide Gysel power splitter, described two π type minor matters 5, symmetry axis
It is overlapped with 1 one side middle line of medium substrate.
The not equal function of above-mentioned four frequency bands based on π type minor matters divide Gysel power splitter, and the incoming feeder 3 is located at medium substrate
On the middle line on 1 one side；Described two output feeders 4 are located at the two sides of incoming feeder 3, and symmetrical about incoming feeder 3.
Compared with the prior art, the invention has the following advantages:
The π type minor matters that the present invention is connected using two in mirror symmetry and one end, each π type minor matters are divided on four frequency bands
Phase difference that Ju You be 90 degree, is connected by two π type minor matters one end, constructs the transmission line that one section of electrical length is 180 degree, can be
Four frequency bands realize impedance mapping function simultaneously, and simulation result shows present invention input/output port echo on four frequency bands
Loss, the insertion loss of output port and isolation indices can meet engine request, compared with prior art, can be very
The job requirement of good adaptation multifrequency terminal equipment.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is π type minor matters structural schematic diagram in Fig. 1；
Fig. 3 is the S parameter analogous diagram of output port insertion loss of the present invention；
Fig. 4 is the S parameter analogous diagram of input and output port return loss of the present invention；
Fig. 5 is the S parameter analogous diagram of output port isolation of the present invention.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the object of the invention, technical solution and technical effect are made further detailed
Description.
Referring to Fig. 1, a kind of not equal function of four frequency bands based on π type minor matters divide Gysel power splitter to include medium substrate 1, described
The lower surface of medium substrate 1 is printed with metal base plate 2, and upper surface is printed with 3, two output feeders 4 of incoming feeder and two are in
The π type minor matters 5 that mirror symmetry and one end connect, which is connected with isolation element 6, described defeated
Enter between feeder line 3 and each output feeder 4 and between an output feeder 4 and an isolation element 6 respectively by four/
The connection of one wavelength impedance transformers 7, and the quarter-wave impedance connected between an output feeder 4 and incoming feeder 3 becomes
The width of the quarter wavelength impedance transducer 7 connected between the width of parallel operation 7, with another output feeder 4 and isolation element 6
The width for spending equal, to connect between two output feeders 4 and incoming feeder 3 quarter wavelength impedance transducer 7 differs,
In:
The medium substrate 1 uses relative dielectric constant for 2.65, loss angle tangent 0.03, size be 56mm ×
51mm, with a thickness of the rectangle F4B material of 0.43mm.
The incoming feeder 3 is rectangular microstrip structure, and long side length optimal value is 6mm, and bond length optimal value is
1.12mm, short side middle line are overlapped with the middle line of 1 short side AA ' of medium substrate；Described two output feeders 4, are located at input
The two sides of feeder line 3, and it is symmetrical about incoming feeder 3, structure snd size and incoming feeder 3 are identical, and incoming feeder 3 and two
Output feeder 4, characteristic impedance value are 50 Ω, convenient integrated with other microwave circuits.
Described two π type minor matters 5, symmetry axis are overlapped with 1 one side middle line of medium substrate.The symmetry axis in the present embodiment
It is overlapped with the middle line of medium substrate short side AA '.Its structure is as shown in Fig. 2, include that sequentially connected first transmission line 51, second passes
Defeated line 52 and third transmission line 53, in the link position and second transmission line 52 of first transmission line 51 and second transmission line 52
Minor matters 54 in parallel are connected separately with the link position of third transmission line 53, and the other end of two minor matters 54 in parallel passes through short circuit
Microstrip line 55 is connected；Each π type minor matters are respectively provided with 90 degree of phase difference on four frequency bands, pass through two π type minor matters one end
Connect, construct the transmission line that one section of electrical length is 180 degree, can realize impedance mapping function simultaneously in four frequency bands, it can be good
Adapt to the job requirement of multifrequency terminal equipment.
The first transmission line 51, second transmission line 52 and minor matters 54 in parallel are all made of and are made of five straight line micro-strips
Quasi- U-shaped structure, wherein first transmission line 51, the length b1=14mm of micro-strip arm, the length a1=2mm at micro-strip bottom, micro-strip
The length a1=2mm, a3=2.08mm of two straight line micro-strips of arm junction；Second transmission line 52, the length b2 of micro-strip arm
=28mm, the length a1=2mm at micro-strip bottom, the length a2=1mm, a4=of two straight line micro-strips of micro-strip arm junction
2.69mm；Minor matters 54 in parallel, the length a2=1mm of micro-strip arm, the length b5=1.84mm at micro-strip bottom, micro-strip arm junction
The length b4=2.57mm, b6=4mm of two straight line micro-strips.
The third transmission line 53 is using the Z-shaped structure being made of three straight line micro-strips, the length of upper and lower two micro-strips
Spend a5=2.08mm, a2=1mm, the length b3=28mm of intermediate micro-strip；And each straight line micro-strip and third in first transmission line 51
The width of each straight line micro-strip is equal in transmission line 53, and width optimal value is 1.43mm, and the width optimal value of second transmission line 52 is
0.82mm, the width optimal value of minor matters 54 in parallel are 1.08mm.
In the first transmission line 51, second transmission line 52, third transmission line 53 and minor matters 54 in parallel, every two straight line is micro-
The junction of band is provided with corner cut, to reduce reflection of the electromagnetic wave in transmission process, preferably 45 degree of corner cuts.
The short-circuit micro-band line 55 and isolation element 6 are connect by metallization VIA 8 with metal base plate 2 respectively, wherein short
Road microstrip line 55 is rectangular microstrip structure, metallization VIA 8 is arranged in the middle part of the rectangular microstrip, rectangular microstrip both ends are provided with 45 degree
Corner cut, the rectangular microstrip long side length optimal value are 5.6mm, and bond length is equal with the width of minor matters 54 in parallel.
Capacitor and inductor parallel connection can be used in isolation element 6, and inductive resistance series connection or single resistance form, the present embodiment use
For Chip-R as isolation element, resistance value optimal value is 100 ohm, to guarantee not wait function to be divided to Gysel power splitter two outputs
There is good isolation between port.8 diameter of metallization VIA is 0.4mm, meets technique processing request, is realized good
It is grounded performance.
The quarter wavelength impedance transducer 7, length is all the same, optimal value 20.78mm, two output feeders
The width optimal value of the quarter wavelength impedance transducer 7 connected between 4 and incoming feeder 3 is respectively 1.3mm and 0.2mm,
Using the quarter wavelength impedance transducer 7 of different line widths, change the allocation proportion of energy, to realize that power is not etc. defeated
Out.
Below in conjunction with emulation experiment, technical effect of the invention is further illustrated:
1, emulation experiment and content
1.1 exist to the S parameter of output port insertion loss in the embodiment of the present invention using business simulation software HFSS_19.2
Simulation calculation is carried out within the scope of 1-4GHz, as a result as shown in Figure 3.
1.2 utilize business simulation software HFSS_19.2 to the S of input and output port return loss in the embodiment of the present invention
Parameter has carried out simulation calculation within the scope of 1-4GHz, as a result as shown in Figure 4.
1.3 utilize business simulation software HFSS_19.2 to the S parameter of output port isolation in the embodiment of the present invention in 1-
Simulation calculation is carried out within the scope of 4GHz, as a result as shown in Figure 5.
2, simulation result
Referring to Fig. 3, the centre frequency of 1 four working bands of embodiment be respectively 1.45GHz, 2.17GHz, 2.86GHz and
3.60GHz, absolute bandwidth (relative bandwidth) be respectively 150/120/240/130MHZ (10.3%/5.52%/8.39%/
3.61%)；In first band, the insertion loss S21 and S31 of two output ports be respectively -1.5 ± 0.9dB and -8.48 ±
0.1dB realizes the function point ratio of 5:1；In second band, the insertion loss S21 and S31 of two output ports are respectively -0.92
± 0.3dB and -8.21 ± 0.4dB realizes the function point ratio of 5:1；In third frequency band, the insertion loss S21 of two output ports
It is respectively -1.3 ± 0.34dB and -9.43 ± 0.41dB with S31, realizes the function point ratio of 6:1；In the 4th frequency band, two outputs
The insertion loss S21 and S31 of port are respectively -0.86 ± 0.1dB and -10.59 ± 1.2dB, realize the function point ratio of 9:1；Table
The bright power splitter realizes not equal function point in four frequency bands.
Referring to Fig. 4, in the first center frequency point, the return loss S11 of input port is -24.74dB, two output ports
Return loss S22 and S33 are respectively -25.68dB and -23.95dB；In the second center frequency point, the return loss S11 of input port
For -15.46dB, the return loss S22 and S33 of two output ports are respectively -15.87dB and -16.97dB；At third center
Frequency point, the return loss S11 of input port are -15.68dB, the return loss S22 and S33 of two output ports be respectively -
15.15dB and -12.93dB；In the 4th center frequency point, the return loss S11 of input port is -20.1dB, two output ports
Return loss S22 and S33 be respectively -22.8dB and -21.72dB；Show that the power splitter is output and input on four frequency bands
Return loss is good, can meet engine request well.
Referring to Fig. 5, in the first center frequency point, the isolation S32 of two output ports is -30.93dB；In the second center frequency
Point, the isolation S32 of two output ports are -24.1dB；In third center frequency point, the isolation S32 of two output ports is-
29.93dB；In the 4th center frequency point, the isolation S32 of two output ports is -29.19dB；Show the power splitter in four frequency bands
Upper two output port isolation effects are good, can meet engine request well.
It is that any limitation of the invention is not constituted, it is clear that for this field to specific embodiments of the present invention above
It, all may be without departing substantially from the principle of the invention and structure the case where for professional, then after understanding and connecing the content of present invention and principle
Under, various modifications and variations in form and details are carried out, but these modifications and variations based on inventive concept are still at this
In the claim and protection scope of invention.
Claims (4)
1. a kind of not equal function of four frequency bands based on π type minor matters divide Gysel power splitter, which is characterized in that including medium substrate (1),
The lower surface of the medium substrate (1) is printed with metal base plate (2), and upper surface is printed with incoming feeder (3), two output feeders
(4) it is connected with two π type minor matters (5) to connect in mirror symmetry and one end, two respective other ends of π type minor matters (5)
Isolation element (6), between the incoming feeder (3) and each output feeder (4) and output feeder (4) with one every
It is connected from quarter wavelength impedance transducer (7) are passed through between element (6) respectively, and an output feeder (4) and input are presented
The width of the quarter wavelength impedance transducer (7) connected between line (3), with another output feeder (4) and isolation element
(6) width of the quarter wavelength impedance transducer (7) connected between is equal, two output feeders (4) and incoming feeder (3)
Between the width of quarter wavelength impedance transducer (7) that connects differ, in which:
The π type minor matters (5), including sequentially connected first transmission line (51), second transmission line (52) and third transmission line
(53), the link position and second transmission line (52) and third in first transmission line (51) and second transmission line (52) transmit
The link position of line (53) is connected separately with minor matters in parallel (54), and the other end of two minor matters (54) in parallel passes through short-circuit micro-band
Line (55) is connected；
The short-circuit micro-band line (55) and isolation element (6) are connect by metallization VIA (8) with metal base plate (2) respectively.
2. the not equal function of four frequency bands according to claim 1 based on π type minor matters divide Gysel power splitter, which is characterized in that institute
First transmission line (51), second transmission line (52) and minor matters (54) in parallel are stated, the quasi- U-shaped being made of five straight line micro-strips is all made of
Type structure, the third transmission line (53) use the Z-shaped structure being made of three straight line micro-strips, and in first transmission line (51)
Each straight line micro-strip is equal with the width of each straight line micro-strip in third transmission line (53), the first transmission line (51), the second transmission
In line (52), third transmission line (53) and minor matters (54) in parallel, the junction of every two straight line micro-strip is provided with corner cut.
3. the not equal function of four frequency bands according to claim 1 based on π type minor matters divide Gysel power splitter, which is characterized in that institute
Two π type minor matters (5) are stated, symmetry axis is overlapped with medium substrate (1) one side middle line.
4. the not equal function of four frequency bands according to claim 1 based on π type minor matters divide Gysel power splitter, which is characterized in that institute
Incoming feeder (3) are stated, are located on the middle line on medium substrate (1) one side；Described two output feeders (4) are located at input feedback
The two sides of line (3), and it is symmetrical about incoming feeder (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910718843.8A CN110518323B (en) | 2019-08-05 | 2019-08-05 | Pi-branch-based four-band unequal power division Gysel power divider |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910718843.8A CN110518323B (en) | 2019-08-05 | 2019-08-05 | Pi-branch-based four-band unequal power division Gysel power divider |
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Cited By (2)
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| CN115332755A (en) * | 2022-08-31 | 2022-11-11 | 哈尔滨工业大学（深圳） | Double-frequency equal-division Gysel power division filter |
| CN115775963A (en) * | 2022-11-01 | 2023-03-10 | 西安电子科技大学 | Broadband multi-node Gysel type power divider |
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| CN115332755A (en) * | 2022-08-31 | 2022-11-11 | 哈尔滨工业大学（深圳） | Double-frequency equal-division Gysel power division filter |
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