CN115313011B - Dual-frequency Gysel power dividing filter with high power ratio - Google Patents
Dual-frequency Gysel power dividing filter with high power ratio Download PDFInfo
- Publication number
- CN115313011B CN115313011B CN202211078297.4A CN202211078297A CN115313011B CN 115313011 B CN115313011 B CN 115313011B CN 202211078297 A CN202211078297 A CN 202211078297A CN 115313011 B CN115313011 B CN 115313011B
- Authority
- CN
- China
- Prior art keywords
- microstrip line
- line
- branch
- microstrip
- dual
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 230000010363 phase shift Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000011160 research Methods 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 230000004927 fusion Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000011166 aliquoting Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
- H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
-
- 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
-
- 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
- H01P1/212—Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention is suitable for the technical improvement field of power distribution, and provides a dual-frequency Gysel power dividing filter with high power ratio, which comprises a conversion component, wherein the input end of the conversion component and one end of a short circuit component are respectively connected with the input end (I/P) of the dual-frequency Gysel power dividing filter, the first output end of the conversion component and one end of a branch component are respectively connected with the output end (O/P1) of the dual-frequency Gysel power dividing filter, the second output end of the conversion component and the other end of the branch component are respectively connected with the output end (O/P2) of the dual-frequency Gysel power dividing filter, one end of an open circuit component is connected with the branch component, one end of an isolation component is connected with the branch component, and the dual-frequency filtering effect is realized in the conversion component by adjusting the position of an input port and an output port and adjusting bandwidth and equivalent impedance. Simple structure, high flexibility, simplified structure, smaller size and contribution to miniaturization of the communication system.
Description
Technical Field
The invention belongs to the technical improvement field of power distribution, and particularly relates to a dual-passband Gysel power division filter capable of realizing high power ratio, which can be applied to an integrated dual-band filtering function of a radio frequency front-end circuit.
Background
As an indispensable device in the rf front-end system, research on filters and power splitters has been a hotspot of rf device research. Because both devices generally need to operate at the same frequency, a precondition for a fused design is present; and the combination of the two devices is very widely used, and if the two devices can be subjected to fusion design, the device has high application value.
The main current fusion design method is to replace a quarter-wavelength microstrip line in a t-shaped structure of a power divider by using a filter circuit with 90-degree phase shift characteristic, and the design method has the advantages that: 1. lower insertion loss 2 is realized, the size 3 of the system is greatly reduced, and the matching difficulty before each part of the system is reduced. Based on such design ideas, many scholars have designed various power division filters.
On the basis of the previous fusion design, in order to expand the concurrent requirement of a modern communication system for a plurality of communication protocols, a learner designs a filter with 90-degree phase shift characteristic in a double frequency band, performs topology analysis on the basis of a double-frequency power divider, and finally obtains parameters of each part of a circuit. And students can analyze by combining a plurality of resonator combinations or technologies such as left-hand and right-hand composite materials and the like with the Wilkinson power divider structure, so that various double-frequency filtering power dividers are realized.
The existing dual-band power division filter mainly has the following problems:
1. The research is based on the structure of the wilkinson power divider, but the isolation device of the wilkinson power divider is only one internal resistor, and the grounding part is lacking in the inside, so that the device based on the structure cannot work in a high-power scene. While there is a blank for analysis of the Gysel power divider with the isolated section having a ground resistance.
2. The research focus is mainly focused on the realization of the equal-division power division filter, but the requirement of the application such as an array antenna and the like on the unequal-division power division filter is ignored, and the application scene of the power division filter is narrowed.
Disclosure of Invention
In view of the above problems and the blank of the current research, the present invention provides a Gysel power divider with dual-band filtering effect. Compared with the existing power division filter, the method fills the blank in the design of unequal power division filters, uses the type of the Gysel power divider applicable to high-power scenes, and widens the application scenes; compared with the traditional Gysel power division filter, the invention uses an impedance converter with 90-degree phase shift under double frequency bands to replace a high-impedance microstrip line with a quarter wavelength in the power division filter. After the design, the power ratio can reach 10:1, the bandwidth can be controlled arbitrarily, and simultaneously, three transmission zeros are introduced at the edges of the pass band, so that the frequency selectivity is improved.
The invention aims to provide a dual-frequency Gysel power division filter with high power ratio, and aims to solve the technical problems.
The invention is realized in such a way that the dual-frequency Gysel power division filter with high power ratio comprises a conversion component, a branch component, an open circuit component, a short circuit component and an isolation component, wherein the input end of the conversion component and one end of the short circuit component are respectively connected with the input end (I/P) of the dual-frequency Gysel power division filter with high power ratio, the first output end of the conversion component and one end of the branch component are respectively connected with the output end (O/P1) of the dual-frequency Gysel power division filter with high power ratio, the second output end of the conversion component and the other end of the branch component are respectively connected with the output end (O/P2) of the dual-frequency Gysel power division filter with high power ratio, one end of the open circuit component is connected with the branch component, one end of the isolation component is connected with the branch component, and the conversion component adjusts the matched impedance by adjusting the coupling strength between two resonators and the length of a port position in the impedance converter.
The invention further adopts the technical scheme that: the microstrip line length of the dual-frequency Gysel power division filter should satisfy the functional formula: (1+m) ×θ=pi, so as to ensure that the angle tangent is unchanged in the dual band, where m is the ratio of two operating frequencies, and θ is the electrical length of the microstrip line in the first operating frequency.
The invention further adopts the technical scheme that: the transformation component comprises a first impedance transformer and a second impedance transformer, wherein the first impedance transformer and the second impedance transformer have 90-degree phase shift at two working frequencies, and the input end of the first impedance transformer is connected with the input end of the second impedance transformer.
The invention further adopts the technical scheme that: the first impedance converter comprises two identical first resonators, the two first resonators are oppositely placed and coupled, the first resonators comprise a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line and a first open-circuit microstrip line, two ends of the first microstrip line are respectively connected with one end of the second microstrip line and one end of the fifth microstrip line, the other end of the second microstrip line is connected with one end of the third microstrip line, the other end of the fifth microstrip line is connected with one end of the fourth microstrip line, one end of the first open-circuit microstrip line is connected with the first microstrip line, and the other end of the first open-circuit microstrip line is adjacent to the fourth microstrip line.
The invention further adopts the technical scheme that: the second microstrip line and the fifth microstrip line are positioned on the same side of the first microstrip line, the first microstrip line and the third microstrip line are positioned on different sides of the second microstrip line, the first microstrip line and the fourth microstrip line are positioned on the same side of the fifth microstrip line, the first microstrip line is parallel to the fourth microstrip line, an extension line of the first microstrip line is parallel to the third microstrip line, the second bit microstrip line, the fifth microstrip line and the first open-circuit microstrip line are parallel to each other, and a center line of the third microstrip line and a center line of the fourth microstrip line are positioned on the same straight line.
The invention further adopts the technical scheme that: the second impedance converter comprises two identical second resonators, the two second resonators are oppositely placed and coupled, the second resonators comprise a sixth microstrip line, a seventh microstrip line, an eighth microstrip line, a ninth bit microstrip line, a tenth microstrip line and a second open-circuit microstrip line, two ends of the sixth microstrip line are respectively connected with one end of the seventh microstrip line and one end of the ninth bit microstrip line, the other end of the seventh microstrip line is connected with one end of the eighth microstrip line, the other end of the ninth microstrip line is connected with one end of the tenth microstrip line, and one end of the second open-circuit microstrip line is connected with the sixth microstrip line.
The invention further adopts the technical scheme that: the seventh microstrip line and the ninth microstrip line are positioned on the same side of the sixth microstrip line, the eighth microstrip line and the sixth microstrip line are positioned on the same side of the seventh microstrip line, the sixth microstrip line and the tenth microstrip line are positioned on different sides of the ninth microstrip line, the seventh microstrip line, the second open-circuit microstrip line and the ninth microstrip line are mutually parallel, the sixth microstrip line is parallel to the eighth microstrip line, an extension line of the sixth microstrip line is parallel to the tenth microstrip line, and a center line of the tenth microstrip line and a center line of the eighth microstrip line are positioned on the same straight line.
The invention further adopts the technical scheme that: the branch line assembly comprises a first branch line, a second branch line, a third branch line and a fourth branch line, wherein one end of the first branch line is connected with an output port (O/P1), the other end of the first branch line is connected with one end of the second branch line, the other end of the second branch line is connected with one end of the third branch line, the other end of the third branch line is connected with one end of the fourth branch line, and the other end of the fourth branch line is connected with an output port (O/P2).
The invention further adopts the technical scheme that: the second branch line comprises an eleventh microstrip line, a twelfth microstrip line and a thirteenth microstrip line, two ends of the twelfth microstrip line are respectively connected with one end of the eleventh microstrip line and one end of the thirteenth microstrip line, the eleventh microstrip line and the thirteenth microstrip line are positioned on different sides of the twelfth microstrip line, and the eleventh microstrip line and the thirteenth microstrip line are parallel on the same plane.
The invention further adopts the technical scheme that: the third branch line comprises a fourteenth microstrip line, a fifteenth microstrip line and a sixteenth microstrip line, two ends of the fifteenth microstrip line are respectively connected with one end of the fourteenth microstrip line and one end of the sixteenth microstrip line, the fourteenth microstrip line and the sixteenth microstrip line are positioned on different sides of the fifteenth microstrip line, and the fourteenth microstrip line and the sixteenth microstrip line are parallel on the same plane.
The invention further adopts the technical scheme that: the short circuit assembly comprises a short circuit microstrip line, one end of the short circuit microstrip line is connected with an input port (I/P), the other end of the short circuit microstrip line is grounded through a via hole, and the short circuit microstrip line is positioned between the first impedance converter and the second impedance converter; the open circuit assembly comprises a third open circuit microstrip line, and one end of the third open circuit microstrip line is connected with the joint of the thirteenth microstrip line and the fourteenth microstrip line; the first branch line adopts a seventeenth microstrip line; the fourth branch line adopts an eighteenth microstrip line; the isolation unit adopts isolation resistance, isolation resistance includes resistance R1 and resistance R2, the one end of resistance R1 is connected the other end of first branch line, the other end ground connection of resistance R1, the one end of resistance R2 is connected the one end of fourth branch line, the other end ground connection of resistance R2.
The beneficial effects of the invention are as follows: compared with the prior art, the invention has the following advantages:
(1) The second working frequency can be independently adjusted, and the device is simple in structure and high in flexibility.
(2) Compared with a cascading mode of a power divider and a filter, the method avoids complex joint matching of multiple devices, has low insertion loss, is simpler in structure, smaller in size and larger in volume optimization space, is beneficial to miniaturization of a communication system, and reduces matching difficulty caused by cascading multiple devices.
(3) The advantage that the Gysel power divider is suitable for a high-power scene is reserved, and the signal of the Gysel power divider has frequency selectivity under dual frequency bands.
(4) Fills up the research blank about unequal power divider in the current dual-frequency power division filter research, and enriches the device design method under different application scenes.
(5) The high power ratio of 10:1 can be realized, the problem that the microstrip line is difficult to process under high impedance is solved through the coupling structure which is convenient to adjust and match impedance, and the microstrip line can be applied to antenna arrays which need high power ratio.
(6) Three transmission zeros are arranged around the passband, and the transmission zeros can enable signals to have strong inhibition outside the passband, so that the filter has better performance and stronger frequency selectivity.
Drawings
Fig. 1 is a topology structure diagram of a device of a Gysel filter power divider with a power ratio of 10:1 provided by an embodiment of the invention.
Fig. 2 is a schematic diagram of a second impedance transformer of the Gysel filter power divider with a power ratio of 10:1 according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a first impedance transformer of the Gysel filter power divider with a power ratio of 10:1 according to an embodiment of the present invention.
Fig. 4 is a simulation result one of the transmission characteristics of the dual-frequency Gysel power division filter with 10:1 power ratio according to the condition design according to the embodiment of the present invention.
Fig. 5 is a simulation result two of the transmission characteristic of the dual-frequency Gysel power division filter with 10:1 power ratio according to the design condition in the embodiment of the present invention.
Detailed Description
As shown in fig. 1-5, the dual-frequency Gysel power division filter with high power ratio provided by the invention comprises a conversion component, a branch component, an open circuit component, a short circuit component and an isolation component, wherein the input end of the conversion component and one end of the short circuit component are respectively connected with the input end (I/P) of the dual-frequency Gysel power division filter with high power ratio, the first output end of the conversion component and one end of the branch component are respectively connected with the output end (O/P1) of the dual-frequency Gysel power division filter with high power ratio, the second output end of the conversion component and the other end of the branch component are respectively connected with the output end (O/P2) of the dual-frequency Gysel power division filter with high power ratio, one end of the open circuit component is connected with the branch component, one end of the isolation component is connected with the branch component, and the conversion component is matched with the impedance by adjusting the coupling strength between two resonators and the length of a port position in the impedance converter in proportion.
The microstrip line length of the dual-frequency Gysel power division filter should satisfy the functional formula: (1+m) ×θ=pi, so as to ensure that the angle tangent is unchanged in the dual band, where m is the ratio of two operating frequencies, and θ is the electrical length of the microstrip line in the first operating frequency. The angle tangent is the tangent corresponding to the electrical length theta of other microstrip lines except the impedance converter in the power division filter at the first working frequency.
The integrated circuit is composed of two converters, four common microstrip lines, an open-circuit microstrip line, a short-circuit microstrip line and two grounding isolation resistors. The converter has the characteristic that two working frequencies are the same 90 ° phase shift, and other branch lines have the characteristic that the electrical lengths of the two frequency bands are complementary, namely (1+m) ×θ=pi: wherein m is the ratio of two working frequencies, and θ is the electrical length of the corresponding microstrip line at the first working frequency.
The transformation component comprises a first impedance transformer and a second impedance transformer, the working frequencies of the first impedance transformer and the second impedance transformer are the same, and the input end of the first impedance transformer is connected with the input end of the second impedance transformer.
The converter is mainly divided into two resonators, the two resonators of each converter are identical in structure and consist of five microstrip lines with electric length and half wavelength and a center branch open-circuit microstrip line, and the two resonators are coupled and connected through the two microstrip lines and are oppositely placed. The converter can be matched to different characteristic impedance by adjusting the position of the port and the coupling strength, and the second frequency working point and the equivalent impedance can be independently adjusted by adjusting the length of the center branch open-circuit microstrip line. Three transmission zeros are introduced beside the pass band of the transmission characteristics of the transformer, increasing the frequency selectivity.
The first impedance transformer comprises two identical first resonators 1 and 2, the two first resonators 1 and 2 are oppositely placed and coupled, the first resonators 1 and 2 comprise a first microstrip line 11, a second microstrip line 12, a third microstrip line 13, a fourth microstrip line 15, a fifth microstrip line 16 and a first open-circuit microstrip line 14, two ends of the first microstrip line 11 are respectively connected with one end of the second microstrip line 12 and one end of the fifth microstrip line 16, the other end of the second microstrip line 12 is connected with one end of the third microstrip line 13, the other end of the fifth microstrip line 16 is connected with one end of the fourth microstrip line 15, one end of the first open-circuit microstrip line 14 is connected with the first microstrip line 11, and the other end of the first open-circuit microstrip line 14 is adjacent to the fourth microstrip line 15.
The lengths of the first open-circuit microstrip line 14 and the corresponding microstrip line of each resonator are obtained according to the ratio of two working frequency points of the power divider, the specific frequency is determined to satisfy the functional formula, Where L1 is the sum of the lengths of the impedance transformer except for the center tap and L2 is the center tap length, a separate adjustment of L2 to adjust the second operating frequency can be achieved after the resonator length is fixed.
The second microstrip line 12 and the fifth microstrip line 16 are located on the same side of the first microstrip line 11, the first microstrip line 11 and the third microstrip line 13 are located on different sides of the second microstrip line 12, the first microstrip line 11 and the fourth microstrip line 15 are located on the same side of the fifth microstrip line 16, the first microstrip line 11 is parallel to the fourth microstrip line 15, an extension line of the first microstrip line 11 is parallel to the third microstrip line 13, the second bit-line 12, the fifth microstrip line 16 and the first open-circuit microstrip line 14 are parallel to each other, and a center line of the third microstrip line 13 and a center line of the fourth microstrip line 15 are located on the same straight line.
The second impedance transformer includes two identical second resonators 3, 4, two second resonators 3, 4 are oppositely placed and coupled, the second resonators 3, 4 include a sixth microstrip line 17, a seventh microstrip line 18, an eighth microstrip line 19, a ninth microstrip line 21, a tenth microstrip line 22 and a second open-circuit microstrip line 20, two ends of the sixth microstrip line 17 are respectively connected with one end of the seventh microstrip line 18 and one end of the ninth microstrip line 21, the other end of the seventh microstrip line 18 is connected with one end of the eighth microstrip line 19, the other end of the ninth microstrip line 21 is connected with one end of the tenth microstrip line 22, and one end of the second open-circuit microstrip line 20 is connected with the sixth microstrip line.
The seventh microstrip line 18 and the ninth microstrip line 21 are located on the same side of the sixth microstrip line 17, the eighth microstrip line 19 and the sixth microstrip line 17 are located on the same side of the seventh microstrip line 18, the sixth microstrip line 17 and the tenth microstrip line 22 are located on different sides of the ninth microstrip line, the seventh microstrip line 18, the second open-circuit microstrip line 20 and the ninth microstrip line 21 are parallel to each other, the sixth microstrip line 17 is parallel to the eighth microstrip line 19, an extension line of the sixth microstrip line 17 is parallel to the tenth microstrip line 22, and a center line of the tenth microstrip line 22 and a center line of the eighth microstrip line 19 are located on the same straight line.
The branch line assembly comprises a first branch line 6, a second branch line 7, a third branch line 8 and a fourth branch line 9, wherein one end of the first branch line 6 is connected with an output port (O/P1), the other end of the first branch line 6 is connected with one end of the second branch line 7, the other end of the second branch line 7 is connected with one end of the third branch line 8, the other end of the third branch line 8 is connected with one end of the fourth branch line 9, and the other end of the fourth branch line 9 is connected with an output port (O/P2).
The second branch line 7 includes an eleventh microstrip line 23, a twelfth microstrip line 24, and a thirteenth microstrip line 25, two ends of the twelfth microstrip line 24 are respectively connected to one end of the eleventh microstrip line 23 and one end of the thirteenth microstrip line 25, the eleventh microstrip line 23 and the thirteenth microstrip line 25 are located on different sides of the twelfth microstrip line 24, and the eleventh microstrip line 23 and the thirteenth microstrip line 25 are parallel on the same plane.
The third branch line 8 includes a fourteenth microstrip line 26, a fifteenth microstrip line 27, and a sixteenth microstrip line 28, two ends of the fifteenth microstrip line 27 are respectively connected to one end of the fourteenth microstrip line 26 and one end of the sixteenth microstrip line 28, the fourteenth microstrip line 26 and the sixteenth microstrip line 28 are located on different sides of the fifteenth microstrip line 27, and the fourteenth microstrip line 26 and the sixteenth microstrip line 28 are parallel on the same plane.
The short circuit assembly comprises a short circuit microstrip line 5, one end of the short circuit microstrip line 5 is connected with an input port (I/P), the other end of the short circuit microstrip line 5 is grounded through a via hole, and the short circuit microstrip line 5 is positioned between the first impedance converter and the second impedance converter; the open circuit assembly comprises a third open circuit microstrip line 10, wherein one end of the third open circuit microstrip line 10 is connected with the connection part of the thirteenth microstrip line 25 and the fourteenth microstrip line 26; the first branch line 6 adopts a seventeenth microstrip line; the fourth branch line 9 adopts an eighteenth microstrip line; the isolation unit adopts isolation resistance, isolation resistance includes resistance R1 and resistance R2, the one end of resistance R1 is connected the other end of first branch line 6, the other end ground connection of resistance R1, the one end of resistance R2 is connected the one end of fourth branch line 9, the other end ground connection of resistance R2.
In order to ensure good isolation and matching under the condition of realizing the fusion design of the dual-band filtering power dividing function, the isolation part of the traditional Gysel power divider needs to be modified so that the device can meet the requirement of dual bands. A short circuit microstrip line and an open circuit microstrip line are introduced on the basis of the isolation part of the traditional Gysel power divider. The short-circuit microstrip line is positioned between the two converters and the input port and is connected with the ground through the via hole; an open microstrip line is connected at one end between microstrip lines 7 and 8. Their characteristic impedance can be obtained by a one-port and two-port matching method, and in order to ensure the same impedance characteristics at different frequencies, the microstrip line electrical lengths except for the split resonator should satisfy the complementary condition, (1+m) ×θ=pi: wherein m is the ratio of two working frequencies, and θ is the electrical length of the corresponding microstrip line at the first working frequency.
The ground resistor is used as an isolation device and is connected between the microstrip lines 6 and 7, and between the microstrip lines 7 and 9, and is connected with the ground, and the value of the ground resistor can be obtained by a port matching method, so that the design can dissipate heat outside the device when the power division filter works, and the power division filter is suitable for a high-power working scene.
Examples
The structure of the dual-frequency Gysel power division filter with high power ratio is shown in fig. 1, the thickness of the dielectric substrate is 0.508mm, and the relative dielectric constant is 3.55.
Fig. 4 and 5 are transmission characteristic simulation results of the dual-frequency Gysel power division filter at a power ratio of 10:1 designed according to the above conditions. In the figure, the horizontal axis represents frequency, and the vertical axis represents transmission characteristics in dB. In fig. 4, S11 represents the input return loss of the dual-frequency aliquoting resonant filter, S21 and S31 represent the insertion loss of the first output port (O/P1) and the second output port (O/P2) into the input port (I/P) when the input ports (I/P) are matched, respectively, and simulation results show that: the Gysel dual-frequency power division filter under the power ratio of 10:1 has two working frequency points, namely 1.88GHz and 3.03GHz; the input return loss S11 is lower than-15 dB in a passband near the working frequency point, is-18.3 dB at the working frequency point of about 1.88GHz, and is-19.1 dB at the working frequency point of about 3.03GHz; the insertion loss S21 has a value of-11.3 dB at the working frequency of 1.88GHz and-11.35 dB at the working frequency of 3.03GHz, and the theoretical value of the insertion loss S21 is-10.4 dB; the insertion loss S31 has a value of-1.25 dB at an operating frequency of 1.88GHz and-1.2 dB at an operating frequency of 3.03GHz, and the theoretical value of the insertion loss S31 is-0.4 dB; the difference between S21 and S31 is 10.05dB at an operating frequency of 1.88GHz and 10.1dB at an operating frequency of 3.03GHz, very close to its theoretical value of 10dB.
Three transmission zeros are shared near the two pass bands, enhancing the frequency selectivity of the filter power divider. In fig. 5, S22 and S33 represent output return loss of the first output port (O/P1) and the second output port (O/P2), respectively, and S23 represents isolation coefficients of the first output port (O/P1) and the second output port (O/P2). Simulation results show that: the pass bands near the two working frequency points are lower than-15 dB, so that the matching of two ports and three ports is realized; the isolation coefficient S23 is lower than-15 dB in the passband near the working frequency point, is-24.2 dB at the working frequency point of 1.88GHz, and is-27.5 dB at the working frequency point of 3.03 GHz.
Simulation results of the embodiment show that the dual-frequency Gysel power division filter under the power ratio of 10:1 can realize dual-frequency operation, and the power distribution function and the filtering function of 10:1.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The dual-frequency Gysel power division filter with the high power ratio is characterized by comprising a conversion component, a branch line component, an open circuit component, a short circuit component and an isolation component, wherein one end of the conversion component is respectively connected with the input end I/P of the dual-frequency Gysel power division filter with the high power ratio, the first output end of the conversion component is respectively connected with the output end O/P1 of the dual-frequency Gysel power division filter with the high power ratio, the second output end of the conversion component is respectively connected with the output end O/P2 of the dual-frequency Gysel power division filter with the high power ratio, one end of the open circuit component is connected with the branch line component, one end of the isolation component is connected with the branch line component, and the conversion component adjusts matched impedance by adjusting the coupling strength between two resonators and the length ratio of a port position in the impedance converter;
the microstrip line length except for the split resonator in the dual-frequency Gysel power division filter should satisfy the complementary condition, and the function formula thereof is as follows: (1+m) θ=pi, so as to ensure that the angle tangent value is unchanged in the dual-band, wherein m is the ratio of two working frequencies, and θ is the electrical length of the corresponding microstrip line in the first working frequency; the conversion assembly comprises a first impedance converter and a second impedance converter, wherein the first impedance converter and the second impedance converter have 90-degree phase shift at two working frequencies, and the input end of the first impedance converter is connected with the input end of the second impedance converter;
The first impedance converter comprises two identical first resonators (1, 2), the two first resonators (1, 2) are oppositely placed and coupled, the first resonators (1, 2) comprise a first microstrip line (11), a second microstrip line (12), a third microstrip line (13), a fourth microstrip line (15), a fifth microstrip line (16) and a first open-circuit microstrip line (14), two ends of the first microstrip line (11) are respectively connected with one end of the second microstrip line (12) and one end of the fifth microstrip line (16), the other end of the second microstrip line (12) is connected with one end of the third microstrip line (13), the other end of the fifth microstrip line (16) is connected with one end of the fourth microstrip line (15), one end of the first open-circuit microstrip line (14) is connected with the first microstrip line (11), and the other end of the first open-circuit microstrip line (14) is adjacent to the fourth microstrip line (15);
The second impedance converter comprises two identical second resonators (3, 4), the two second resonators (3, 4) are oppositely placed and coupled, the second resonators (3, 4) comprise a sixth microstrip line (17), a seventh microstrip line (18), an eighth microstrip line (19), a ninth microstrip line (21), a tenth microstrip line (22) and a second open-circuit microstrip line (20), two ends of the sixth microstrip line (17) are respectively connected with one end of the seventh microstrip line (18) and one end of the ninth microstrip line (21), the other end of the seventh microstrip line (18) is connected with one end of the eighth microstrip line (19), the other end of the ninth microstrip line (21) is connected with one end of the tenth microstrip line (22), and one end of the second open-circuit microstrip line (20) is connected with the sixth microstrip line.
2. The dual-band Gysel power splitting filter with high power ratio according to claim 1, characterized in that the second microstrip line (12) and the fifth microstrip line (16) are located on the same side of the first microstrip line (11), the first microstrip line (11) and the third microstrip line (13) are located on different sides of the second microstrip line (12), the first microstrip line (11) and the fourth microstrip line (15) are located on the same side of the fifth microstrip line (16), the first microstrip line (11) is parallel to the fourth microstrip line (15), an extension line of the first microstrip line (11) is parallel to the third microstrip line (13), the second microstrip line (12), the fifth microstrip line (16) and the first open-circuit microstrip line (14) are parallel to each other, and a center line of the third microstrip line (13) and a center line of the fourth microstrip line (15) are located on the same straight line.
3. The dual-band Gysel power splitting filter with high power ratio according to claim 2, characterized in that the seventh microstrip line (18) is located on the same side of the sixth microstrip line (17) as the ninth microstrip line (21), the eighth microstrip line (19) is located on the same side of the seventh microstrip line (18) as the sixth microstrip line (17), the sixth microstrip line (17) is located on a different side of the ninth microstrip line from the tenth microstrip line (22), the seventh microstrip line (18), the second open-circuit microstrip line (20) and the ninth microstrip line (21) are parallel to each other, the sixth microstrip line (17) is parallel to the eighth microstrip line (19), an extension line of the sixth microstrip line (17) is parallel to the tenth microstrip line (22), and a center line of the tenth microstrip line (22) is located on the same straight line as a center line of the eighth microstrip line (19).
4. A dual frequency Gysel power splitting filter with high power ratio according to claim 3, characterized in that the branch line assembly comprises a first branch line (6), a second branch line (7), a third branch line (8) and a fourth branch line (9), one end of the first branch line (6) is connected with an output port O/P1, the other end of the first branch line (6) is connected with one end of the second branch line (7), the other end of the second branch line (7) is connected with one end of the third branch line (8), the other end of the third branch line (8) is connected with one end of the fourth branch line (9), and the other end of the fourth branch line (9) is connected with an output port O/P2.
5. The dual-frequency Gysel power splitting filter with high power ratio according to claim 4, wherein the second branch line (7) comprises an eleventh microstrip line (23), a twelfth microstrip line (24) and a thirteenth microstrip line (25), two ends of the twelfth microstrip line (24) are respectively connected with one end of the eleventh microstrip line (23) and one end of the thirteenth microstrip line (25), the eleventh microstrip line (23) and the thirteenth microstrip line (25) are located on different sides of the twelfth microstrip line (24), and the eleventh microstrip line (23) and the thirteenth microstrip line (25) are parallel on the same plane.
6. The dual-frequency Gysel power splitting filter with high power ratio according to claim 5, wherein the third branch line (8) comprises a fourteenth microstrip line (26), a fifteenth microstrip line (27) and a sixteenth microstrip line (28), two ends of the fifteenth microstrip line (27) are respectively connected with one end of the fourteenth microstrip line (26) and one end of the sixteenth microstrip line (28), the fourteenth microstrip line (26) and the sixteenth microstrip line (28) are located on different sides of the fifteenth microstrip line (27), and the fourteenth microstrip line (26) and the sixteenth microstrip line (28) are parallel on the same plane.
7. The dual-frequency Gysel power splitting filter with high power ratio according to claim 6, wherein the shorting assembly comprises a shorting microstrip line (5), one end of the shorting microstrip line (5) is connected to an input port I/P, the other end of the shorting microstrip line (5) is grounded through a via, and the shorting microstrip line (5) is located between the first impedance transformer and the second impedance transformer; the open circuit assembly comprises a third open circuit microstrip line (10), and one end of the third open circuit microstrip line (10) is connected with the joint of the thirteenth microstrip line (25) and the fourteenth microstrip line (26); the first branch line (6) adopts a seventeenth microstrip line; the fourth branch line (9) adopts an eighteenth microstrip line; the isolation unit adopts isolation resistance, isolation resistance includes resistance R1 and resistance R2, the one end of resistance R1 is connected the other end of first branch line (6), the other end ground connection of resistance R1, the one end of resistance R2 is connected the one end of fourth branch line (9), the other end ground connection of resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211078297.4A CN115313011B (en) | 2022-09-05 | 2022-09-05 | Dual-frequency Gysel power dividing filter with high power ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211078297.4A CN115313011B (en) | 2022-09-05 | 2022-09-05 | Dual-frequency Gysel power dividing filter with high power ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115313011A CN115313011A (en) | 2022-11-08 |
| CN115313011B true CN115313011B (en) | 2024-05-07 |
Family
ID=83867446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211078297.4A Active CN115313011B (en) | 2022-09-05 | 2022-09-05 | Dual-frequency Gysel power dividing filter with high power ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115313011B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201699114U (en) * | 2010-06-23 | 2011-01-05 | 中国科学院微电子研究所 | Microwave double-frequency power divider based on Gysel-type power divider |
| CN102637938A (en) * | 2011-02-15 | 2012-08-15 | 中国科学院微电子研究所 | Double-frequency power divider and design method thereof |
| CN103700917A (en) * | 2013-12-20 | 2014-04-02 | 华南理工大学 | Gysel power distribution filter with high power distribution ratio |
| CN105098303A (en) * | 2015-08-25 | 2015-11-25 | 华南理工大学 | Power divider with double-band filter function |
| CN111146553A (en) * | 2020-01-10 | 2020-05-12 | 大连海事大学 | Double-frequency balance/unbalance power divider with independent arbitrary power dividing ratio |
-
2022
- 2022-09-05 CN CN202211078297.4A patent/CN115313011B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201699114U (en) * | 2010-06-23 | 2011-01-05 | 中国科学院微电子研究所 | Microwave double-frequency power divider based on Gysel-type power divider |
| CN102637938A (en) * | 2011-02-15 | 2012-08-15 | 中国科学院微电子研究所 | Double-frequency power divider and design method thereof |
| CN103700917A (en) * | 2013-12-20 | 2014-04-02 | 华南理工大学 | Gysel power distribution filter with high power distribution ratio |
| CN105098303A (en) * | 2015-08-25 | 2015-11-25 | 华南理工大学 | Power divider with double-band filter function |
| CN111146553A (en) * | 2020-01-10 | 2020-05-12 | 大连海事大学 | Double-frequency balance/unbalance power divider with independent arbitrary power dividing ratio |
Non-Patent Citations (1)
| Title |
|---|
| 数字电视发射系统宽带功分器的设计;陈胥哲;《中国优秀硕士学位论文全文数据库》;第18-19页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115313011A (en) | 2022-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101976754B (en) | Tri-band Wilkinson power distributor | |
| KR20080062587A (en) | Power divider and power combiner using dual band - composite right / left handed transmission line | |
| CN105098303A (en) | Power divider with double-band filter function | |
| CN105514547A (en) | Low-pass band-pass five-duplex based on novel frequency separation structure | |
| CN103915669A (en) | Filtering power divider with double passing bands | |
| CN114284673B (en) | Substrate integrated waveguide dual-band filtering balun | |
| CN113659300B (en) | Broadband four-power divider | |
| CN111147159A (en) | Calibration circuit, calibration network and smart antenna | |
| CN205159476U (en) | Power distribution unit with double frequency -band filtering function | |
| CN111384534A (en) | Three-way band-pass power division filter | |
| CN115313011B (en) | Dual-frequency Gysel power dividing filter with high power ratio | |
| CN218101661U (en) | Double-frequency Gysel power division filter with high power division ratio | |
| CN114499456B (en) | Broadband orthogonal signal generator based on two-stage hybrid | |
| CN113140882B (en) | Miniaturized filtering crossing directional coupler | |
| Tan et al. | Tunable Couplers: An Overview of Recently Developed Couplers With Tunable Functions | |
| CN112713378A (en) | Ultra-wideband miniaturized power divider, design method and multi-channel communication network terminal | |
| CN102569955B (en) | Dual-frequency band-pass filter based on asymmetric branch node load resonators | |
| CN115332755B (en) | Dual-frequency equal-division Gysel power division filter | |
| Wang et al. | Reconfigurable Bandpass Filter With Multi-Band Switching and Band Shiftability | |
| CN210693947U (en) | Calibration circuit, calibration network and smart antenna | |
| CN219873998U (en) | Upper layer microstrip structure of filter power divider and novel Gysel filter power divider | |
| JP2015035759A (en) | Divider/combiner and stub portion for transmission line having stub | |
| CN218039765U (en) | Upper-layer microstrip structure of power division filter and double-frequency equal division Gysel power division filter | |
| CN115458882B (en) | Balance type broadband phase shifter | |
| CN117691351B (en) | Broadband filtering circularly polarized antenna loaded with serial configuration filtering strips |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |