CN115775963A - Broadband multi-node Gysel type power divider - Google Patents
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Abstract
The invention discloses a broadband multi-branch-node Gysel type power divider, wherein L is 1 、L 9 、L 10 、L 11 、L 15 、L 16 And L 8 Are sequentially connected in the clockwise direction to form a closed loop, L 1 And L 8 The connection part of the signal input end is connected with the signal input end; l is a radical of an alcohol 12 、L 13 、L 14 And L 11 Sequentially connecting in a clockwise direction to form a closed loop; l is a radical of an alcohol 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in the clockwise direction to form a closed loop L 4 、L 5 、L 6 And L 3 Sequentially connecting 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, and one end of the third isolation resistor is connected to N 4 The other end is grounded, and one end of the fourth isolation resistor is connected to N 5 The other end is grounded, and one end of a fifth isolating resistor is connected to N 6 And 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-node Gysel type power divider.
Background
The power divider is a device which divides one path of input signal energy into two paths or multiple paths of energy with equal or unequal outputs, and can also synthesize multiple paths of signal energy into one path of output, which is called a combiner at this time. Compare in the Wilkinson merit and divide the ware, the ware has introduced two ground connection isolation resistance to the Gysel merit, has overcome the Wilkinson merit and has divided the ware and not lead to its not good problem of heat dissipation under the high power condition because of the isolation resistance between the output port does not have ground connection, and this makes the ware is divided to the Gysel merit have great power capacity, consequently received more attention.
No matter high demands of civil communication on data transmission quantity and transmission speed, full-band coverage demands of electronic countermeasure, or high integration and high efficiency demands of a radio frequency system, higher demands are made on the broadband characteristics of a radio frequency device, but the traditional Gysel topology structure expands the bandwidth and means obvious deterioration of insertion loss and isolation.
Therefore, in order to solve the above problem, those skilled in the art need to provide a novel wideband Gysel power divider to solve the contradiction between wideband and low insertion loss and high isolation.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a broadband multi-branch-node Gysel type power divider. The technical problem to be solved by the invention is realized by the following technical scheme:
the invention provides a broadband multi-branch-node Gysel type power divider, which comprises: signal input, first signal output, second signal output, a plurality of isolation resistance and sixteen sections branch lines: l is a radical of an alcohol 1 -L 16 (ii) a Wherein, the first and the second end of the pipe are connected with each other,
first branch line L 1 Ninth branch line L 9 The tenth branch 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 the clockwise direction to form a closed loop, L 1 And L 8 Is connected with the signal input end; l is 10 Is connected with the first signal output end, and has a second end connected with the twelfth branch line L 12 Is connected, L 15 Is connected with the second signal output end, and the second end is connected with the fourteenth branch line L 14 Is connected, L 12 Thirteenth branch line L 13 And a fourteenth branch line L 14 And L 11 Sequentially connecting in a clockwise direction to form a closed loop; first end of second branch line and L 1 Connected to the second end of the fourth branch L 4 Connection, L 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in the clockwise direction to form a closed loop L 4 、L 5 、L 6 And L 3 Sequentially connecting in a clockwise direction to form a closed loop;
L 2 comprises 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 Comprising a third node N 3 One end of the second isolation resistor is connected to N 3 The other end is grounded, L 6 Comprising a fourth node N 4 One end of the third isolation resistor is connected to N 4 The other end is grounded, L 12 Comprises a fifth node N 5 One end of the fourth isolation resistor is connected to N 5 The other end is grounded, L 14 Comprises a sixth node N 6 One end of the fifth isolation resistor is connected to N 6 And the other end is grounded.
In one embodiment of the invention, L 3 、L 5 、L 11 And L 13 The lengths of the two groups are equal and are all lambda/2; and λ represents the wavelength of the working frequency of the broadband multi-branch-node Gysel type power divider.
In the present inventionIn 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 Are equal in length and are each lambda/4.
In one embodiment of the invention, L 1 And L 8 Has an impedance of Z 11 ，L 9 And L 16 Has an impedance of Z 21 Wherein Z is 11 And Z 21 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 Has an impedance of Z 12 ，L 10 And L 15 Has an impedance of Z 22 Wherein, in the step (A),
in one embodiment of the present invention, L 3 Has an impedance of Z 13 ，L 4 And L 6 Has an impedance of Z 14 ，L 5 Has an impedance of Z 15 L11 has an impedance of Z 23 ，L 12 And L 14 Has an impedance of Z 24 ，L 13 Has an impedance of 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 an embodiment of the present invention, the insertion loss L' of the broadband multi-node Gysel type power divider is:
in one embodiment of the present invention,
wherein j =1,2,3,4,R represents a resistance value of the first isolation resistor, and R ∈ (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,
is 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-node Gysel type power divider, which can realize power distribution and synthesis of large bandwidth by enabling a plurality of branches to form a plurality of frequency resonance points, and overcomes the limitation of the bandwidth of the traditional Gysel type power divider; moreover, because the plurality of branch nodes are interconnected to form a loop, compared with the structure of grounding and branch nodes in the prior art, the loss caused by grounding is reduced, so that the insertion loss can be reduced, a plurality of isolation resistors in the power divider are also favorable for improving the isolation degree, and a practical scheme is provided for solving the contradiction between large bandwidth, low insertion loss and high isolation degree; in addition, the Gysel type power divider can bear high power and is suitable for high-power distribution and synthesis application of microwaves.
The present invention will be described in further detail with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a broadband multi-branch-node Gysel-type power divider according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a broadband multi-branch-node Gysel-type power divider according to an embodiment of the present invention;
fig. 3 is a graph of a standing wave reflection S parameter of the broadband multi-branch-node Gysel type power divider provided in the embodiment of the present invention;
fig. 4 is a transmission S parameter graph of the broadband multi-branch Gysel type power divider according to the embodiment of the present invention;
fig. 5 is a graph of an output isolation S parameter of the broadband multi-branch Gysel type power divider according to the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Fig. 1 is a schematic structural diagram of a broadband multi-branch-node 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-branch-node Gysel type power divider, including: signal input end Port1, first signal output end Port2, second signal output end Port3, a plurality of isolation resistance and sixteen branch lines: l is 1 -L 16 (ii) a Wherein the content of the first and second substances,
first branch line L 1 And a ninth branch line L 9 The tenth branch 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 the clockwise direction to form a closed loop L 1 And L 8 Is connected with the signal input end; l is 10 A first end of the first branch line is connected with the first signal output end, a second end of the first branch line is connected with the twelfth branch line L 12 Is connected, L 15 Has a first end connected with the second signal output end, a second end connected with the fourteenth branch line L 14 Connection, L 12 Thirteenth branch line L 13 And a fourteenth branch line L 14 And L 11 Sequentially connecting in a clockwise direction to form a closed loop; first end of second branch line and L 1 Connected to the second end of the fourth branchL 4 Is connected, L 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in the clockwise direction to form a closed loop L 4 、L 5 、L 6 And L 3 Sequentially connecting in a clockwise direction to form a closed loop;
L 2 comprises 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 Comprising a third node N 3 One end of the second isolation resistor is connected to N 3 The other end is grounded, L 6 Comprising a fourth node N 4 One end of the third isolation resistor is connected to N 4 The other end is grounded, L 12 Comprises a fifth node N 5 One end of the fourth isolation resistor is connected to N 5 The other end is grounded, L 14 Comprises a sixth node N 6 One end of the fifth isolation resistor is connected to N 6 And the other end is grounded.
In this example, L 3 、L 5 、L 11 And L 13 Are all equal in length and are each 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 The lengths of the two sections are equal and are lambda/4, wherein lambda represents the wavelength of the working frequency of the broadband multi-branch-node Gysel type power divider.
Fig. 2 is another schematic structural diagram of a broadband multi-branch-node Gysel-type power divider according to an embodiment of the present invention. Further, please refer to FIG. 2, L 1 And L 8 Has an impedance of Z 11 ，L 9 And L 16 Has an impedance of Z 21 Wherein, Z 11 And Z 21 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-node Gysel type power divider, the working frequency band and the allowable frequency band of the power divider are determined firstlyMaximum insertion loss Lmax, minimum allowable isolation Imin and input-output port impedance Z 0 Then, the characteristic impedance Z of the first branch line and the eighth branch line is determined 11 Characteristic impedances Z of the ninth branch line and the eighteenth branch line 21 The value ranges of the two are (Z) 0 /2，Z 0 /2 0.5 ) And calculating the insertion loss L' of the broadband multi-node Gysel type power divider according to the following formula:
then, judging whether L' is smaller than Lmax; if not, then L is re-determined 1 And an eighth branch line L 8 Characteristic impedance Z of 11 And L 9 And L 18 Characteristic impedance Z of 21 Until the calculated L' is less than Lmax.
Calculating L according to the following formula 2 And L 7 Impedance Z of 12 And L 10 And L 15 Impedance Z of 22 ：
It should be noted that, in the achievable microstrip line size, the fourth branch line L is usually used 4 A sixth branch line L 6 Selecting a larger characteristic impedance Z 14 Is a twelfth branch line L 12 And a fourteenth branch line L 14 Selecting a larger characteristic impedance Z 24 Is a third branch line L 3 Selecting a smaller characteristic impedance Z 13 Is a fifth branch line L 5 Selecting a smaller characteristic impedance Z 15 Is an eleventh branch line L 11 Selecting a smaller characteristic impedance Z 23 Is a thirteenth branch line L 13 Selecting a smaller characteristic impedance Z 25 (ii) a Exemplarily, 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, it is necessary to first determine the resistance value R of the first isolation resistor, where R belongs to (Z ∈) 11 ,2Z 11 ) And further calculating the resistance values of the other four isolation resistors according to the following formula:
wherein 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,
is the resistance of the fifth isolation resistor.
It should be noted that the difference between the line thicknesses in fig. 1-2 is merely for the convenience of distinguishing sixteen branch lines, and the actual structure or the actual manufacturing process of the broadband multi-node Gysel type power divider is not limited.
Fig. 3 is a graph of the standing wave reflection S parameter of the broadband multi-branch Gysel type power divider according to the embodiment of the present invention. As shown in fig. 3, the reflection coefficient of each port in the 23-35GHz band is greater than 15 db, and can reach up to 30 db; fig. 4 is a transmission S parameter curve diagram of a broadband multi-branch-node 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 an output isolation S parameter of the broadband multi-branch Gysel type power divider according to the 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 27 GHz-36 GHz, so that the design technical index requirement of the broadband Gysel power divider is met. Therefore, the broadband multi-branch-node Gysel type power divider provided by the invention can complete 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 the broadband characteristic in a compensation microwave system.
The beneficial effects of the invention are that:
the invention provides a broadband multi-branch-node Gysel type power divider, which can realize power distribution and synthesis of large bandwidth by enabling a plurality of branches to form a plurality of frequency resonance points, and overcomes the limitation of the bandwidth of the traditional Gysel type power divider; moreover, as the plurality of branch joints are interconnected to form a loop, compared with the structure of grounding and branch joints in the prior art, the loss caused by grounding is reduced, so that the insertion loss can be reduced, the isolation degree can be improved by the plurality of isolation resistors in the power divider, and a practical scheme is provided for solving the contradiction among 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 and synthesis application of microwaves.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
While the present application has been described 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 drawings, 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 specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. A broadband multi-node Gysel type power divider is characterized by comprising: signal input end, first signal output end, second signal output end, a plurality of isolation resistance and sixteen sections branch lines: l is 1 -L 16 (ii) a Wherein the content of the first and second substances,
first branch line L 1 And a ninth branch line L 9 The tenth branch 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 the clockwise direction to form a closed loop L 1 And L 8 Is connected with the signal input end; l is 10 A first end of the first branch line is connected with the first signal output end, a second end of the first branch line is connected with the twelfth branch line L 12 Is connected, L 15 First end of and stationThe second signal output end is connected with the fourteenth branch line L 14 Is connected, L 12 Thirteenth branch line L 13 Fourteenth branch line L 14 And L 11 Sequentially connecting in a clockwise direction to form a closed loop; first end of second branch line and L 1 Connected to the second end of the fourth branch L 4 Is connected, L 1 、L 2 、L 3 、L 7 And L 8 Are sequentially connected in the clockwise direction to form a closed loop, L 4 、L 5 、L 6 And L 3 Sequentially connecting in a clockwise direction to form a closed loop;
L 2 comprises 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 Comprising a third node N 3 One end of the second isolation resistor is connected to N 3 The other end is grounded, L 6 Comprising a fourth node N 4 One end of the third isolation resistor is connected to N 4 The other end is grounded, L 12 Comprises a fifth node N 5 One end of the fourth isolation resistor is connected to N 5 The other end is grounded, L 14 Comprises a sixth node N 6 One end of the fifth isolation resistor is connected to N 6 And the other end is grounded.
2. The broadband multi-branch Gysel type power divider as recited in claim 1, wherein L is L 3 、L 5 、L 11 And L 13 Are equal in length and are lambda/2; and λ represents the wavelength of the working frequency of the broadband multi-branch-node Gysel type power divider.
3. The broadband multi-branch Gysel type power divider as recited in claim 2, wherein L is 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 Are equal in length and are each lambda/4.
4. The broadband multi-branch Gysel type power divider as recited in claim 1, wherein L is L 1 And L 8 Has an impedance of Z 11 ，L 9 And L 16 Has an impedance of Z 21 Wherein Z is 11 And Z 21 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.
5. The broadband multi-branch-node Gysel-type power divider according to claim 4, wherein L is 2 And L 7 Has an impedance of Z 12 ，L 10 And L 15 Has an impedance of Z 22 Wherein, in the step (A),
6. the broadband multi-branch Gysel type power divider as recited in claim 5, wherein L is 3 Has an impedance of Z 13 ，L 4 And L 6 Has an impedance of Z 14 ，L 5 Has an impedance of Z 15 L11 has an impedance of Z 23 ，L 12 And L 14 Has an impedance of Z 24 ，L 13 Has an impedance of Z 25 Wherein, 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 )。
7. The broadband multi-branch Gysel type power divider as claimed in claim 6, wherein the insertion loss L' of the broadband multi-branch Gysel type power divider is:
8. the broadband multi-stub Gysel-type power divider according to claim 4,
wherein j =1,2,3,4,R represents a resistance value of the first isolation resistor, and R ∈ (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,
is the resistance of the fifth isolation resistor.
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