CN112838840B - Broadband equal-power distribution/synthesis circuit topology with broadband deep isolation - Google Patents
Broadband equal-power distribution/synthesis circuit topology with broadband deep isolation Download PDFInfo
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- CN112838840B CN112838840B CN202011645126.6A CN202011645126A CN112838840B CN 112838840 B CN112838840 B CN 112838840B CN 202011645126 A CN202011645126 A CN 202011645126A CN 112838840 B CN112838840 B CN 112838840B
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 43
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims abstract description 113
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- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 239000000725 suspension Substances 0.000 claims abstract description 4
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
Abstract
A broadband equal power distribution/synthesis circuit topology with broadband deep isolation is achieved by introducing a multimode resonator and broadband complex isolation impedance simultaneously. The power distribution/synthesis circuit topologies are characterized in that a quarter impedance transformation line of the power distribution/synthesis circuit topologies is replaced by a multimode resonator on the basis of classical Wilkinson equal power distribution/synthesis circuit topologies, and input and output of the multimode resonator are realized through a strong coupling feeder technology; meanwhile, the isolation pure resistor is replaced by a broadband complex isolation impedance, and the complex isolation impedance is realized through a specific transmission line network and the pure resistor; the equal power distribution/synthesis circuit topology finally disclosed by the invention has the functions of broadband power distribution/synthesis, low input/output standing wave and broadband deep output isolation. Based on the equal power distribution/synthesis circuit topology disclosed by the invention, the equal power distribution/synthesis circuit topology can be realized by combining transmission lines supporting TEM waves/quasi-TEM waves, such as common microstrip transmission lines, suspension microstrip transmission lines, strip line transmission lines, ridge clearance waveguide transmission lines and the like, with surface mount resistors.
Description
Technical Field
The invention belongs to the technical field of electromagnetic fields and microwaves, and particularly relates to a broadband equal-power distribution/synthesis circuit topology with broadband deep isolation, which is particularly suitable for broadband power distribution/synthesis and networks requiring broadband deep isolation.
Background
In communication and radar front-end system design, power splitting/combining circuitry is an important class of critical passive devices that can be used for both power combining network design of power amplifier chips and combining networks of phased array systems, and also for image reject mixer design, etc. Classical power splitting/combining circuits have wilkinson and Gysel circuit topologies, however their splitting/combining bandwidth and output isolation bandwidth are typically small, typically around 20%. For broadband large-scale array applications, such bandwidths often cannot meet the requirements, and isolation between channel units in such array applications is also highly required, so that research into broadband equal-power distribution/synthesis circuits with broadband deep isolation is required.
In recent years, a wide-band power distribution/synthesis circuit based on a classical wilkinson circuit topology has been studied more, wherein the wide-band power distribution/synthesis circuit is represented by a multi-stage transmission line matching technology, a multi-mode resonant cavity loading technology, a quasi-coupled line loading technology, a capacitive loading multi-stage transmission line matching technology and the like, and the application of the technologies effectively increases the distribution/synthesis bandwidth and the isolation bandwidth of the power distribution/synthesis circuit, however, the isolation degree is limited, and is generally about 20 dB. Therefore, researchers have proposed techniques based on complex isolation impedance and surface wave suppression for isolation improvement, but such narrow-band complex isolation impedance techniques are more suitable for power division filter circuits with relatively narrow bandwidths. For the broadband power distribution/synthesis circuit, the broadband complex isolation impedance technology is combined on the basis of the broadband technology, and the expansion of the bandwidth and the improvement of the isolation are realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a broadband equal power distribution/synthesis circuit topology with broadband deep isolation, which realizes broadband power distribution/synthesis, low input-output standing wave and broadband deep output isolation functions and is beneficial to large-scale array application with high isolation requirement.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a broadband equal power distribution/synthesis circuit topology with broadband deep isolation, the circuit topology having axial symmetry, comprising: the system comprises a public port, two first strong coupling feeder lines, two multimode resonators, two second strong coupling feeder lines, a broadband complex isolation impedance and two distribution/synthesis ports; the public port is respectively connected to the two distribution/synthesis ports through two paths with the same structure, in each path, the public port, the first strong coupling feeder line, the multimode resonator, the second strong coupling feeder line and the distribution/synthesis ports are sequentially connected, and the broadband complex isolation impedance is connected between the two multimode resonators.
In order to optimize the technical scheme, the specific measures adopted further comprise:
further, in each path, the first strong coupling feeder line adopts a first coupling transmission line, the second strong coupling feeder line adopts a second coupling transmission line, half of the first coupling transmission line and half of the second coupling transmission line are connected with the first transmission line, and the multimode resonator is realized through a branch line technology.
Further, the even mode characteristic impedance, the odd mode characteristic impedance and the electrical length of the first coupling transmission line are Z respectively e1 ＝150Ω，Z o1 ＝30Ω，θ c1 =90°; the even mode characteristic impedance, the odd mode characteristic impedance and the electrical length of the second coupling transmission line are respectively Z e2 ＝100Ω，Z o2 ＝9Ω，θ c2 =90°; the characteristic impedance and the electrical length of the first transmission line are respectively Z b ＝200Ω，θ b ＝5°。
Further, the broadband complex isolation impedance is composed of a second transmission line, a third transmission line, a fourth transmission line, a fifth transmission line, a sixth transmission line, a seventh transmission line and a resistor; one end of the second transmission line is connected with one of the first transmission lines, the other end of the second transmission line is connected with the fourth transmission line and the sixth transmission line respectively, the other end of the sixth transmission line is connected with a resistor, the other end of the resistor is connected with the seventh transmission line, the other end of the seventh transmission line is connected with the fifth transmission line and the third transmission line respectively, and the other end of the third transmission line is connected with the other first transmission line.
Further, the impedance and the electrical length of the second transmission line and the third transmission line are respectively Z i1 ＝48Ω，θ il =146°; the impedance and the electrical length of the fourth transmission line and the fifth transmission line are respectively Z i2 ＝48Ω，θ i2 The characteristic impedance and the electrical length of the sixth transmission line and the seventh transmission line are respectively Z i3 ＝48Ω，θ i3 =32°; the resistance value of the resistor is R i ＝68Ω。
Further, the circuit topology is realized by combining a transmission line supporting the TEM wave/quasi-TEM wave with a surface-mount resistor, and the transmission line supporting the TEM wave/quasi-TEM wave comprises a common microstrip transmission line, a suspension microstrip transmission line, a strip line transmission line and a ridge gap waveguide transmission line.
Further, the circuit topology is implemented by a single-layer circuit or a multi-layer circuit.
Further, the multimode resonator is implemented by a transmission line multimode resonator, a substrate integrated waveguide multimode resonator, a gap waveguide multimode resonator, or a centralized LC multimode resonator.
The beneficial effects of the invention are as follows: the invention can realize the functions of broadband power division/synthesis, low input/output standing wave and broadband deep output isolation simultaneously, and is beneficial to large-scale array application with high requirements on broadband and isolation.
Drawings
Fig. 1 is a schematic diagram of a wideband equal power distribution/synthesis circuit with wideband deep isolation according to the present invention.
Fig. 2 is a diagram of an embodiment of a transmission line with broadband equal power distribution/synthesis circuit topology with broadband deep isolation according to the present invention.
Fig. 3a-3d are simulation results of performance of an embodiment of a transmission line with broadband equal power distribution/combining circuit topology with broadband deep isolation according to the present invention, wherein fig. 3a shows the return loss of port 1, fig. 3b shows the power distribution transmission performance, fig. 3c shows the return loss of port 2/3, and fig. 3d shows the isolation of output port 2/3.
The reference numerals are as follows: 1. a common port; 2. a first strongly coupled feed line; 3. a multimode resonator; 4. a second strongly coupled feed line; 5. broadband complex isolation impedance; 6. distribution/synthesis ports; 7. a first coupled transmission line; 8. a first transmission line; 9. a second coupled transmission line; 10. a second transmission line; 10', a third transmission line; 11. a fourth transmission line; 11', a fifth transmission line; 12. a sixth transmission line; 12', a seventh transmission line; 13. and (3) resistance.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a broadband equal power distribution/synthesis circuit topology with broadband deep isolation. The power distribution/synthesis circuit topologies are characterized in that a quarter impedance transformation line of the power distribution/synthesis circuit topologies is replaced by a multimode resonator on the basis of classical Wilkinson equal power distribution/synthesis circuit topologies, and input and output and the multimode resonator are realized through a strong coupling feeder technology; meanwhile, the isolated pure resistor is replaced by a broadband complex isolated impedance, and the complex isolated impedance is realized through a specific transmission line network and the pure resistor. The power splitting/combining circuit topologies are symmetrical about axis SS'.
Fig. 2 is a schematic diagram of the circuit topology of fig. 1 implemented based on transmission lines. Wherein the first and second coupling transmission lines 7 and 9 implement the first and second strong coupling feed lines 2 and 4, respectively, of fig. 1, and half of the first and second coupling transmission lines 7 and 9 are connected to the first transmission line 8, the multimode resonator 3 of fig. 1 is implemented by a branch line technique. The second 10, third 10', fourth 11, fifth 11', sixth 12, seventh 12' transmission lines constitute branch line transmission lines on the isolation branch and together with the resistor 13 constitute the broadband complex isolation impedance 5 in fig. 1.
As shown in fig. 2, specific circuit parameters are: z is Z e1 ＝150Ω，Z o1 ＝30Ω，θ c1 ＝90°，Z e2 ＝100Ω，Z o2 ＝9Ω，θ c2 ＝90°，Z b ＝200Ω，θ＝5°，Z i1 ＝48Ω，θ i1 ＝146°，Z i2 ＝48Ω，θ i2 ＝5°，Z i3 ＝48Ω，θ i3 ＝32°，R i ＝68Ω。
The equal power distribution/synthesis circuit topology provided by the invention can be realized by combining transmission lines supporting TEM waves/quasi-TEM waves such as common microstrip transmission lines, suspension microstrip transmission lines, strip line transmission lines, ridge gap waveguide transmission lines and the like with surface mount resistors, and can be realized by a single-layer circuit or a multi-layer circuit, and the multimode resonator can be realized by a transmission line multimode resonator, a substrate integrated waveguide multimode resonator, a gap waveguide multimode resonator, a centralized LC multimode resonator and the like.
Fig. 3 is a graph of simulation results of an embodiment of an ideal transmission line for a broadband equal power distribution/combining circuit topology with broadband deep isolation according to the present invention, where fig. 3a shows the return loss of port 1, fig. 3b shows the power distribution transmission performance (equal power 3dB bandwidth is about 76.8%), fig. 3c shows the return loss of port 2/3, and fig. 3d shows the isolation of output port 2/3 (port isolation better than 40dB is achieved in the 7.2GHz to 12.0GHz frequency range). As can be seen from the drawings, the invention can realize the functions of broadband power division/synthesis, low input/output standing wave and broadband deep output isolation simultaneously, and is beneficial to large-scale array application with high requirements on broadband and isolation.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (6)
1. A broadband equal power distribution/synthesis circuit topology with broadband deep isolation, the circuit topology having axial symmetry, comprising: a common port (1), two first strongly coupled feed lines (2), two multimode resonators (3), two second strongly coupled feed lines (4), a broadband complex isolation impedance (5) and two distribution/synthesis ports (6); the public port (1) is respectively connected to two distribution/synthesis ports (6) through two paths with the same structure, in each path, the public port (1), the first strong coupling feeder line (2), the multimode resonators (3), the second strong coupling feeder line (4) and the distribution/synthesis ports (6) are sequentially connected, and the broadband complex isolation impedance (5) is connected between the two multimode resonators (3);
in each path, the first strong coupling feeder line (2) adopts a first coupling transmission line (7), the second strong coupling feeder line (4) adopts a second coupling transmission line (9), one half of the first coupling transmission line (7) and one half of the second coupling transmission line (9) are connected with a first transmission line (8), and the multimode resonator (3) is realized through a branch line technology;
the broadband complex isolation impedance (5) is composed of a second transmission line (10), a third transmission line (10 '), a fourth transmission line (11), a fifth transmission line (11 '), a sixth transmission line (12), a seventh transmission line (12 ') and a resistor (13); one end of the second transmission line (10) is connected with one of the first transmission lines (8), the other end of the second transmission line is connected with the fourth transmission line (11) and the sixth transmission line (12) respectively, the other end of the sixth transmission line (12) is connected with the resistor (13), the other end of the resistor (13) is connected with the seventh transmission line (12 '), the other end of the seventh transmission line (12 ') is connected with the fifth transmission line (11 ') and the third transmission line (10 ') respectively, and the other end of the third transmission line (10 ') is connected with the other first transmission line (8).
2. A broadband equal power distribution/synthesis circuit topology with broadband deep isolation according to claim 1, wherein: the even mode characteristic impedance, the odd mode characteristic impedance and the electrical length of the first coupling transmission line (7) are respectively Z e1 ＝150Ω,Z o1 ＝30Ω,θ c1 =90°; the even mode characteristic impedance, the odd mode characteristic impedance and the electrical length of the second coupling transmission line (9) are respectively Z e2 ＝100Ω,Z o2 ＝9Ω,θ c2 =90°; the characteristic impedance and the electrical length of the first transmission line (8) are Z respectively b ＝200Ω，θ b ＝5°。
3. A broadband equal power distribution/synthesis circuit topology with broadband deep isolation according to claim 1, wherein: the impedance and the electrical length of the second transmission line (10) and the third transmission line (10') are Z respectively i1 ＝48Ω,θ i1 =146°; the impedance and the electrical length of the fourth transmission line (11) and the fifth transmission line (11') are respectively Z i2 ＝48Ω,θ i2 =5°, characteristic impedance and electrical length of the sixth transmission line (12), the seventh transmission line (12') are Z i3 ＝48Ω,θ i3 =32°; the resistance value of the resistor (13) is R i ＝68Ω。
4. A broadband equal power distribution/synthesis circuit topology with broadband deep isolation according to claim 1, wherein: the circuit topology is realized by combining a transmission line supporting the TEM wave/quasi-TEM wave with a surface mount resistor, and the transmission line supporting the TEM wave/quasi-TEM wave comprises a common microstrip transmission line, a suspension microstrip transmission line, a strip line transmission line and a ridge gap waveguide transmission line.
5. A broadband equal power distribution/synthesis circuit topology with broadband deep isolation according to claim 1, wherein: the circuit topology is implemented by a single-layer circuit or a multi-layer circuit.
6. A broadband equal power distribution/synthesis circuit topology with broadband deep isolation according to claim 1, wherein: the multimode resonator (3) is realized by a transmission line multimode resonator, a substrate integrated waveguide multimode resonator, a gap waveguide multimode resonator or a centralized LC multimode resonator.
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| CN117480726A (en) * | 2021-06-15 | 2024-01-30 | 华为技术有限公司 | Signal transmission network, phased array system and electronic equipment |
| CN114039185B (en) * | 2021-11-24 | 2023-04-21 | 南京理工大学 | Broadband filtering power divider capable of realizing high power division ratio and wide isolation bandwidth |
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| CN201523061U (en) * | 2009-06-19 | 2010-07-07 | 南京理工大学 | Miniaturized UWB (ultra wide band) microstrip power divider |
| CN202737076U (en) * | 2012-08-21 | 2013-02-13 | 华南理工大学 | Equal power distributor integrated with band-pass filtering function |
| CN103700917A (en) * | 2013-12-20 | 2014-04-02 | 华南理工大学 | Gysel power distribution filter with high power distribution ratio |
| KR102046408B1 (en) * | 2018-07-23 | 2019-11-19 | 광운대학교 산학협력단 | A power divider with enhanced selectivity performance |
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| TWI637553B (en) * | 2016-05-20 | 2018-10-01 | 新加坡商雲網科技新加坡有限公司 | Power distribution circuit and power divider using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201523061U (en) * | 2009-06-19 | 2010-07-07 | 南京理工大学 | Miniaturized UWB (ultra wide band) microstrip power divider |
| CN202737076U (en) * | 2012-08-21 | 2013-02-13 | 华南理工大学 | Equal power distributor integrated with band-pass filtering function |
| CN103700917A (en) * | 2013-12-20 | 2014-04-02 | 华南理工大学 | Gysel power distribution filter with high power distribution ratio |
| KR102046408B1 (en) * | 2018-07-23 | 2019-11-19 | 광운대학교 산학협력단 | A power divider with enhanced selectivity performance |
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