CN115775963B - Broadband multi-section Gysel type power divider - Google Patents
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Abstract
The invention discloses a broadband multi-section Gysel type power divider, wherein L 1 、L 9 、L 10 、L 11 、L 15 、L 16 And L 8 Are sequentially connected in a clockwise direction to form a closed loop L 1 And L is equal to 8 Is connected with the signal input end; l (L) 12 、L 13 、L 14 And L 11 Sequentially connecting the two parts in a clockwise direction to form a closed loop; l (L) 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in a clockwise direction to form a closed loop L 4 、L 5 、L 6 And L 3 Sequentially connecting the two parts in a clockwise direction to form a closed loop; two ends of the first isolation resistor are respectively connected with N 1 、N 2 One end of the second isolation resistor is connected to N 3 The other end is grounded, one end of the third isolation resistor is connected to N 4 One end of the fourth isolation resistor is connected to N 5 One end of the fifth isolation resistor is connected to N 6 The other end is grounded. The invention can reduce the insertion loss, improve the isolation, bear high power and is suitable for high-power distribution synthesis application of microwaves.
Description
Technical Field
The invention belongs to the technical field of microwave power dividers, and particularly relates to a broadband multi-section Gysel type power divider.
Background
The power divider is a device for dividing one path of input signal energy into two paths or multiple paths of output equal or unequal energy, and can also combine multiple paths of signal energy into one path of output, which is called a combiner at the moment. Compared with a Wilkinson power divider, the Gysel power divider introduces two grounding isolation resistors, and solves the problem that the Wilkinson power divider is poor in heat dissipation under the high power condition because the isolation resistors between output ports are not grounded, so that the Gysel power divider has larger power capacity, and is more concerned.
Whether civil communication requires high data transmission amount and transmission speed, electronic countermeasure full-band coverage, or high integration and high efficiency of a radio frequency system, higher requirements are put on broadband characteristics of radio frequency devices, but expanding bandwidth of a traditional Gysel topology means significant deterioration of insertion loss and isolation.
Therefore, in order to solve the contradiction between broadband and low insertion loss and high isolation, a new broadband Gysel power divider is needed by those skilled in the art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a broadband multi-section Gysel type power divider. The technical problems to be solved by the invention are realized by the following technical scheme:
the invention provides a broadband multi-section Gysel type power divider, which comprises: signal input part, first signal output part, second signal output part, a plurality of isolation resistance and sixteen segmentation branch lines: l (L) 1 -L 16 The method comprises the steps of carrying out a first treatment on the surface of the Wherein,
first branch line L 1 Ninth branch line L 9 A tenth branch line L 10 Eleventh branch line L 11 Fifteenth branch line L 15 Sixteenth branch line L 16 And an eighth branch line L 8 Are sequentially connected in a clockwise direction to form a closed loop L 1 And L is equal to 8 Is connected with the signal input end; l (L) 10 Is connected with the first signal output end and the second signal output endEnd and twelfth branch line L 12 Connection, L 15 A first end connected to the second signal output end, a second end connected to the fourteenth branch line L 14 Connection, L 12 Thirteenth branch line L 13 Fourteenth branch line L 14 And L 11 Sequentially connecting the two parts in a clockwise direction to form a closed loop; first end of second branch line and L 1 Connected, second end and fourth branch line L 4 Connection, L 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in a clockwise direction to form a closed loop L 4 、L 5 、L 6 And L 3 Sequentially connecting the two parts in a clockwise direction to form a closed loop;
L 2 comprising a first node N 1 ，L 7 Comprising a second node N 2 Two ends of the first isolation resistor are respectively connected with N 1 、N 2 Connection, L 4 Including a third node N 3 One end of the second isolation resistor is connected to N 3 The other end is grounded, L 6 Including a fourth node N 4 One end of the third isolation resistor is connected to N 4 The other end is grounded, L 12 Including a fifth node N 5 One end of the fourth isolation resistor is connected to N 5 The other end is grounded, L 14 Includes a sixth node N 6 One end of the fifth isolation resistor is connected to N 6 The other end is grounded.
In one embodiment of the invention, L 3 、L 5 、L 11 And L 13 Equal in length, are λ/2; wherein lambda represents the wavelength of the working frequency of the broadband multi-section Gysel type power divider.
In one embodiment of the invention, L 1 、L 2 、L 4 、L 6 、L 7 、L 8 、L 9 、L 10 、L 12 、L 14 、L 15 And L 16 Equal in length, are all lambda/4.
In one embodiment of the invention, L 1 And L 8 Is Z 11 ，L 9 And L 16 Is Z 21 Wherein Z is 11 And Z 21 The value range of (2) is (Z 0 /2，Z 0 /2 0.5 )，Z 0 Representing the impedance of the signal input, the first signal output and the second signal output.
In one embodiment of the invention, L 2 And L 7 Is Z 12 ，L 10 And L 15 Is Z 22 Wherein, the method comprises the steps of, wherein,
in one embodiment of the invention, L 3 Is Z 13 ，L 4 And L 6 Is Z 14 ，L 5 Is Z 15 The impedance of L11 is Z 23 ，L 12 And L 14 Is Z 24 ，L 13 Is Z 25 Wherein Z is 13 ∈(Z 12 /2,Z 12 /2 0.5 )、Z 14 ∈(2 0.5 Z 12 ,2Z 12 )、Z 15 ∈(Z 13 /2 0.5 ,Z 13 )、Z 23 ∈(Z 22 /2,Z 22 /2 0.5 )、Z 24 ∈(2 0.5 Z 22 ,2Z 22 )、Z 25 ∈(Z 23 /2 0.5 ,Z 23 )。
In one embodiment of the present invention, the insertion loss L' of the broadband multi-section Gysel-type power divider is:
in one embodiment of the present invention,
wherein j=1, 2,3,4, R represents the resistance value of the first isolation resistor, R e (Z 11 ,2Z 11 )，Is the resistance value of the second isolation resistor +.>Is the resistance value of the third isolation resistor +.>Is the resistance value of the fourth isolation resistor +.>The resistance of the fifth isolation resistor.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a broadband multi-branch-section Gysel-type power divider, which can realize large-bandwidth power distribution and synthesis by enabling a plurality of branches to form a plurality of frequency resonance points, and overcomes the bandwidth limitation of the existing Gysel-type power divider; in addition, as the plurality of branch joints are interconnected to form a loop, compared with the structure of the grounding parallel branch joint in the prior art, the loss caused by grounding is reduced, so that the insertion loss can be reduced, the isolation degree is improved by a plurality of isolation resistors in the power divider, and a practical scheme is provided for solving the contradiction between the large bandwidth, the low insertion loss and the high isolation degree; in addition, the Gysel type power divider can bear high power and is suitable for high-power distribution synthesis application of microwaves.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic diagram of a broadband multi-section Gysel-type power divider according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another structure of a broadband multi-section Gysel-type power divider according to an embodiment of the present invention;
FIG. 3 is a graph of the standing wave reflection S parameter of the broadband multi-section Gysel-type power divider provided by the embodiment of the invention;
FIG. 4 is a graph of transmission S parameters of a broadband multi-section Gysel-type power divider provided by an embodiment of the present invention;
fig. 5 is a graph of output isolation S parameters of a broadband multi-section Gysel-type power divider according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but embodiments of the present invention are not limited thereto.
Fig. 1 is a schematic structural diagram of a broadband multi-section Gysel-type power divider according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a broadband multi-section Gysel type power divider, including: signal input Port1, first signal output Port2, second signal output Port3, a plurality of isolation resistors and sixteen-segment branch lines: l (L) 1 -L 16 The method comprises the steps of carrying out a first treatment on the surface of the Wherein,
first branch line L 1 Ninth branch line L 9 A tenth branch line L 10 Eleventh branch line L 11 Fifteenth branch line L 15 Sixteenth branch line L 16 And an eighth branch line L 8 Are sequentially connected in a clockwise direction to form a closed loop L 1 And L is equal to 8 Is connected with the signal input end; l (L) 10 A first end connected to the first signal output end, a second end connected to the twelfth branch line L 12 Connection, L 15 A first end connected to the second signal output end, a second end connected to the fourteenth branch line L 14 Connection, L 12 Thirteenth branch line L 13 Fourteenth branch line L 14 And L 11 Sequentially connecting the two parts in a clockwise direction to form a closed loop; first end of second branch line and L 1 Connected, second end and fourth branch line L 4 Connection, L 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in a clockwise direction to form a closed loop L 4 、L 5 、L 6 And L 3 Sequentially connecting the two parts in a clockwise direction to form a closed loop;
L 2 comprising a first node N 1 ，L 7 Comprising a second node N 2 Of a first isolation resistanceTwo ends are respectively connected with N 1 、N 2 Connection, L 4 Including a third node N 3 One end of the second isolation resistor is connected to N 3 The other end is grounded, L 6 Including a fourth node N 4 One end of the third isolation resistor is connected to N 4 The other end is grounded, L 12 Including a fifth node N 5 One end of the fourth isolation resistor is connected to N 5 The other end is grounded, L 14 Includes a sixth node N 6 One end of the fifth isolation resistor is connected to N 6 The other end is grounded.
In the present embodiment, L 3 、L 5 、L 11 And L 13 Are equal in length, are lambda/2, L 1 、L 2 、L 4 、L 6 、L 7 、L 8 、L 9 、L 10 、L 12 、L 14 、L 15 And L 16 And the lengths of the two power dividers are equal to each other and are lambda/4, wherein lambda represents the wavelength of the working frequency of the broadband multi-section Gysel type power divider.
Fig. 2 is another schematic structural diagram of a broadband multi-section Gysel-type power divider according to an embodiment of the present invention. Further, please refer to fig. 2, l 1 And L 8 Is Z 11 ，L 9 And L 16 Is Z 21 Wherein Z is 11 And Z 21 The value range of (2) is (Z 0 /2，Z 0 /2 0.5 )，Z 0 Representing the impedance of the signal input, the first signal output and the second signal output.
Specifically, in the process of designing the broadband multi-section Gysel-type power divider, the working frequency band, allowable maximum insertion loss Lmax, allowable minimum isolation Imin and input/output port impedance Z of the power divider are firstly determined 0 Then, the characteristic impedance Z of the first branch line and the eighth branch line is determined 11 Characteristic impedance Z of ninth branch line and eighteenth branch line 21 The value ranges of the two are (Z 0 /2，Z 0 /2 0.5 ) And calculates the insertion loss L' of the broadband multi-section Gysel type power divider according to the following formula:
then, judging whether L' is smaller than Lmax; if not, then re-determine L 1 And an eighth branch line L 8 Characteristic impedance Z of (2) 11 L and 9 and L 18 Characteristic impedance Z of (2) 21 Until L' is calculated to be less than Lmax.
L is calculated according to the following formula 2 And L 7 Impedance Z of (2) 12 L and 10 and L 15 Impedance Z of (2) 22 ：
Note that, in the achievable microstrip line size, the fourth branch line L is generally 4 A sixth branch line L 6 Selecting a larger characteristic impedance Z 14 For the twelfth branch line L 12 Fourteenth branch line L 14 Selecting a larger characteristic impedance Z 24 Is the third branch line L 3 Selecting a smaller characteristic impedance Z 13 Is the fifth branch line L 5 Selecting a smaller characteristic impedance Z 15 Is the eleventh branch line L 11 Selecting a smaller characteristic impedance Z 23 For thirteenth branch line L 13 Selecting a smaller characteristic impedance Z 25 The method comprises the steps of carrying out a first treatment on the surface of the Illustratively, Z 13 ∈(Z 12 /2,Z 12 /2 0.5 )、Z 14 ∈(2 0.5 Z 12 ,2Z 12 )、Z 15 ∈(Z 13 /2 0.5 ,Z 13 )、Z 23 ∈(Z 22 /2,Z 22 /2 0.5 )、Z 24 ∈(2 0.5 Z 22 ,2Z 22 )、Z 25 ∈(Z 23 /2 0.5 ,Z 23 )。
In this embodiment, when determining the resistance values of the five isolation resistors, the resistance value R, R e (Z) of the first isolation resistor needs to be determined first 11 ,2Z 11 ) And further calculating the resistance values of the other four isolation resistors according to the following formula:
where j=1, 2,3,4,is the resistance value of the second isolation resistor +.>Is the resistance value of the third isolation resistor,is the resistance value of the fourth isolation resistor +.>The resistance of the fifth isolation resistor.
It should be noted that the difference of the thickness of the wires in fig. 1-2 is only for the convenience of distinguishing sixteen branch wires, and is not limited to the actual structure or the actual manufacturing process of the broadband multi-branch Gysel-type power divider.
Fig. 3 is a graph of a standing wave reflection S parameter of a broadband multi-section Gysel-type power divider according to an embodiment of the present invention. As shown in FIG. 3, the reflection coefficient of each port is greater than 15 dB and up to 30 dB in the frequency band of 23-35 GHz; fig. 4 is a graph of transmission S parameters of a wideband multi-section Gysel-type power divider according to an embodiment of the present invention. Referring to fig. 4, the insertion loss is less than 3.3 db in the 25-35GHz band. Fig. 5 is a graph of output isolation S parameters of a broadband multi-section Gysel-type power divider according to an embodiment of the present invention. As shown in FIG. 5, the isolation is greater than 15 dB in the frequency band of 25-38GHz, and greater than 25 dB in the frequency band of 27GHz to 36GHz, thereby meeting the design technical index requirements of the broadband Gysel power divider. Therefore, the broadband multi-section Gysel type power divider provided by the invention can finish the design of the power divider by predefining the required insertion loss, has the characteristics of low insertion loss and good matching of input and output ports, and can be applied to compensating the broadband characteristic in a microwave system.
According to the above embodiments, the beneficial effects of the invention are as follows:
the invention provides a broadband multi-branch-section Gysel-type power divider, which can realize large-bandwidth power distribution and synthesis by enabling a plurality of branches to form a plurality of frequency resonance points, and overcomes the bandwidth limitation of the existing Gysel-type power divider; in addition, as the plurality of branch joints are interconnected to form a loop, compared with the structure of the grounding parallel branch joint in the prior art, the loss caused by grounding is reduced, so that the insertion loss can be reduced, the isolation degree is improved by a plurality of isolation resistors in the power divider, and a practical scheme is provided for solving the contradiction between the large bandwidth, the low insertion loss and the high isolation degree; in addition, the Gysel type power divider can bear high power and is suitable for high-power distribution synthesis application of microwaves.
In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
Although the present application has been described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the figures, the disclosure, and the appended claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. A broadband multi-section Gysel-type power divider, comprising: signal input part, first signal output part, second signal output part, a plurality of isolation resistance and sixteen segmentation branch lines: l (L) 1 -L 16 The method comprises the steps of carrying out a first treatment on the surface of the Wherein,
first branch line L 1 Ninth branch line L 9 A tenth branch line L 10 Eleventh branch line L 11 Fifteenth branch line L 15 Sixteenth branch line L 16 And an eighth branch line L 8 Are sequentially connected in a clockwise direction to form a closed loop L 1 And L is equal to 8 Is connected with the signal input end; l (L) 10 A first end connected to the first signal output end, a second end connected to the twelfth branch line L 12 Connection, L 15 A first end connected to the second signal output end, a second end connected to the fourteenth branch line L 14 Connection, L 12 Thirteenth branch line L 13 Fourteenth branch line L 14 And L 11 Sequentially connecting the two parts in a clockwise direction to form a closed loop; second branch line L 2 And L 1 Connected, second end and fourth branch line L 4 Connection, L 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in a clockwise direction to form a closed loop L 4 、L 5 、L 6 And L 3 Sequentially connecting the two parts in a clockwise direction to form a closed loop;
L 2 comprising a first node N 1 ，L 7 Comprising a second node N 2 Two ends of the first isolation resistor are respectively connected with N 1 、N 2 Connection, L 4 Including a third node N 3 One end of the second isolation resistor is connected to N 3 The other end is grounded, L 6 Including a fourth node N 4 One end of the third isolation resistor is connected to N 4 The other end is grounded, L 12 Including a fifth node N 5 One end of the fourth isolation resistor is connected to N 5 The other end is grounded, L 14 Includes a sixth node N 6 One end of the fifth isolation resistor is connected to N 6 The other end is grounded.
2. The broadband multi-section Gysel-type power divider according to claim 1, wherein L 3 、L 5 、L 11 And L 13 Equal in length, are λ/2; wherein lambda represents the wavelength of the working frequency of the broadband multi-section Gysel type power divider.
3. The broadband multi-section Gysel-type power divider according to claim 2, wherein L 1 、L 2 、L 4 、L 6 、L 7 、L 8 、L 9 、L 10 、L 12 、L 14 、L 15 And L 16 Equal in length, are all lambda/4.
4. The broadband multi-section Gysel-type power divider according to claim 1, wherein L 1 And L 8 Is Z 11 ，L 9 And L 16 Is Z 21 Wherein Z is 11 And Z 21 The value range of (2) is (Z 0 /2，Z 0 /2 0.5 )，Z 0 Representing the signal input terminal, the firstAnd the impedance of the signal output end and the second signal output end.
5. The broadband multi-section Gysel-type power divider according to claim 4, wherein L 2 And L 7 Is Z 12 ，L 10 And L 15 Is Z 22 Wherein, the method comprises the steps of, wherein,
6. the broadband multi-section Gysel-type power divider according to claim 5, wherein L 3 Is Z 13 ，L 4 And L 6 Is Z 14 ，L 5 Is Z 15 ，L 11 Is Z 23 ，L 12 And L 14 Is Z 24 ，L 13 Is Z 25 Wherein Z is 13 ∈(Z 12 /2,Z 12 /2 0.5 )、Z 14 ∈(2 0.5 Z 12 ,2Z 12 )、Z 15 ∈(Z 13 /2 0.5 ,Z 13 )、Z 23 ∈(Z 22 /2,Z 22 /2 0.5 )、Z 24 ∈(2 0.5 Z 22 ,2Z 22 )、Z 25 ∈(Z 23 /2 0.5 ,Z 23 )。
7. The broadband multi-section Gysel-type power divider according to claim 6, wherein the insertion loss L' of the broadband multi-section Gysel-type power divider is:
wherein R represents the resistance value of the first isolation resistor, R E (Z) 11 ,2Z 11 )。
8. The broadband multi-section Gysel-type power divider according to claim 4, wherein,
wherein j=1, 2,3,4, R represents the resistance value of the first isolation resistor, R e (Z 11 ,2Z 11 )，Is the resistance value of the second isolation resistor +.>Is the resistance value of the third isolation resistor +.>Is the resistance value of the fourth isolation resistor +.>The resistance of the fifth isolation resistor.
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