CN108539353B - Ultra-wideband planar magic T - Google Patents
Ultra-wideband planar magic T Download PDFInfo
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- CN108539353B CN108539353B CN201810556453.0A CN201810556453A CN108539353B CN 108539353 B CN108539353 B CN 108539353B CN 201810556453 A CN201810556453 A CN 201810556453A CN 108539353 B CN108539353 B CN 108539353B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
- H01P5/20—Magic-T junctions
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Abstract
The invention discloses a novel super-bandwidth planar magic T, which comprises a first metal layer, a second metal layer, a third metal layer and a fourth metal layer which are sequentially arranged from bottom to top, wherein a 3-section cascade 3dB and 90-degree hybrid bridge is formed by a coupling line CL3, a coupling line CL4, a coupling line CL5, a coupling line CL6, a coupling line CL7, a coupling line CL8, an open-circuit loading branch T3, an open-circuit loading branch T4, an open-circuit loading branch T5 and an open-circuit loading branch T6; a 90-degree phase shifter is formed by a transmission line L1, a transmission line L2, a transmission line L3, a transmission line L4, a coupled line CL1, a coupled line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2; the phase-shifting channel is formed by a transmission line L1, a transmission line L2, a transmission line L3, a coupling line CL1, a coupling line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2, and the transmission line L4 forms a reference channel to form a magic T structure. The invention has compact structure and small volume, and can further expand the bandwidth.
Description
Technical Field
The invention relates to a microwave device, in particular to an ultra-wideband planar magic T.
Background
The magic T is a four-port device, combines the characteristics of a power divider and a balun, can output the sum and difference of two paths of input signals, has wide application in the technical field of microwave, and can be used for forming a microwave impedance bridge, a balanced mixer, a power divider, a sum and difference device, an antenna duplexer, a balanced phase detector, a frequency discriminator, a modulator and the like. However, the conventional waveguide magic T has a three-dimensional structure, and is large in size, and the working bandwidth is narrow due to the difficulty in realizing a broadband matching circuit, and although the bandwidth is expanded to a certain extent by the planar magic T based on the slot line structure, the requirements of compactness, small size and further bandwidth expansion cannot be met.
Disclosure of Invention
The invention solves the technical problem of providing the ultra-wideband planar magic T which has compact structure and small volume and can further expand the bandwidth aiming at the defects of the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme.
An ultra-wideband planar magic T comprises an input port P1, an input port P4, an output port P2, an output port P3, a ground port P5, a ground port P6, a first metal layer, a second metal layer, a third metal layer, a fourth metal layer, a connecting through hole V1, a connecting through hole V2, a connecting through hole V3, a connecting through hole V4 and a connecting through hole V5, wherein: the first metal layer, the second metal layer, the third metal layer and the fourth metal layer are sequentially arranged from bottom to top; the front end of the first metal layer is sequentially provided with an output port P3, a ground port P6 and an output port P2 at intervals from left to right, and the rear end of the first metal layer is sequentially provided with an input port P1, a ground port P5 and an input port P4 at intervals from left to right; a grounding shielding layer GND is arranged on the first metal layer; a transmission line L1, a transmission line L2, a transmission line L3, a transmission line L4, a transmission line L5, a transmission line L6, a coupling line CL1, a coupling line CL2, a loading open-circuit branch T1 and a loading open-circuit branch T2 are arranged on the second metal layer; a coupling line CL3, a coupling line CL6, a coupling line CL7, an open loading branch T3 and an open loading branch T6 are arranged on the third metal layer; a coupling line CL4, a coupling line CL5, a coupling line CL8, an open loading branch T4 and an open loading branch T5 are arranged on the fourth metal layer; the loading open-circuit branch T1 is arranged at the rear side of the loading open-circuit branch T2, the open-circuit loading branch T3 is arranged at the rear side of the open-circuit loading branch T4, the open-circuit loading branch T5 is arranged at the rear side of the open-circuit loading branch T6, the loading open-circuit branches T2 are arranged at the rear side of the open-circuit loading branch T3 at intervals, and the open-circuit loading branch T5 is arranged at the right side of the open-circuit loading branch T3 at intervals; one end of the transmission line L1 is connected to the input port P1, the other end is connected to the coupling line CL1, one end of the coupling line CL1 is connected to the transmission line L1, the other end is connected to the transmission line L2, one end of the coupling line CL2 is connected to the transmission line L2, the other end is connected to the transmission line L3, the transmission line L2 is connected to the ground shield GND through a connection via V2, the coupling line CL2 and the coupling line CL2 are respectively connected to the loading open-circuit branch T2 and the loading open-circuit branch T2, both the loading open-circuit branch T2 and the loading open-circuit branch T2 are connected to the transmission line L2, one end of the transmission line L2 is connected to the coupling line CL2, the other end is connected to the output port P2, one end of the transmission line L2 is connected to the input port P2, and the other end is connected to the coupling line CL2 through a connection via V2, one end of the transmission line L6 is connected with the coupling line CL6 through the connecting through hole V5, the other end is connected with the output port P2, one end of the coupling line CL3 is connected with the connecting through hole V2, the other end is connected with the coupling line CL7, the junction of the coupling line CL3 and the coupling line CL7 is connected with an open loading branch T3, the junction of the coupling line CL7 and the coupling line CL6 is connected with an open loading branch T6, one end of the coupling line CL6 is connected with the coupling line CL7, the other end is connected with the connecting through hole V5, one end of the coupling line CL4 is connected with the connecting through hole V3, the other end is connected with the coupling line CL8, the junction of the coupling line CL4 and the coupling line CL8 is connected with an open loading branch T4, the junction of the coupling line CL8 and the coupling line CL5 is connected with an open loading branch T5, one end of the coupling line CL5 is connected with the coupling line CL8, the other end of the coupling line CL5 is connected with the connecting through hole V4, and the grounding port P5 and the grounding port P6 are both connected with the grounding shielding layer GND.
Preferably, the input port P1, the input port P4, the output port P2, the output port P3, the ground port P5 and the ground port P6 are all ports with 50-ohm characteristic impedance; the characteristic impedances of the transmission line L1, the transmission line L3, the transmission line L4, the transmission line L5, and the transmission line L6 are all 50 ohms.
Preferably, a side-edge coupling structure is formed between the coupling line CL1 and the coupling line CL2, a side-edge misalignment coupling structure is formed between the coupling line CL3 and the coupling line CL4, a side-edge misalignment coupling structure is formed between the coupling line CL5 and the coupling line CL6, and a broadside coupling structure is formed between the coupling line CL7 and the coupling line CL 8.
Preferably, the input port P1, the input port P4, the output port P2, the output port P3, the ground port P5, the ground port P6, the first metal layer, the second metal layer, the third metal layer, the fourth metal layer, the connecting via V1, the connecting via V2, the connecting via V3, the connecting via V4 and the connecting via V5 are all manufactured and processed by LTCC low-temperature co-fired ceramic process.
In the ultra-wideband planar magic T disclosed by the invention, a 3-section cascade 3dB and 90-degree hybrid bridge is formed by a coupling line CL3, a coupling line CL4, a coupling line CL5, a coupling line CL6, a coupling line CL7, a coupling line CL8, an open-circuit loading branch T3, an open-circuit loading branch T4, an open-circuit loading branch T5 and an open-circuit loading branch T6; a 90-degree phase shifter is formed by a transmission line L1, a transmission line L2, a transmission line L3, a transmission line L4, a coupled line CL1, a coupled line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2; the phase-shifting channel is formed by a transmission line L1, a transmission line L2, a transmission line L3, a coupling line CL1, a coupling line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2, and the transmission line L4 forms a reference channel to form a magic T structure. Compared with the prior art, the planar magic T has the advantages that the 90-degree phase shifter is combined with the 3-section cascade 3dB and 90-degree hybrid bridge, the three-dimensional multilayer integrated structure is adopted, the structural layout of the planar magic T is more compact, the size is smaller, the weight is lighter, the reliability is higher, the microwave simulation software test shows that the planar magic T has lower insertion loss and higher isolation degree, the relative bandwidth can reach 89%, the bandwidth of the planar magic T is further expanded, the application requirement of wider bandwidth can be met, in addition, the circuit structure of the planar magic T is simple, mass production can be realized, the planar magic T can be used as a part independently, the mounting and the welding can be realized through a full-automatic chip mounter, and the practicability and the usability are better.
Drawings
FIG. 1 is a perspective view of a planar magic T of the present invention;
FIG. 2 is a diagram of the structure of a first metal layer, a second metal layer, a third metal layer and a fourth metal layer;
FIG. 3 is an equivalent schematic diagram of the planar magic T of the present invention;
FIG. 4 is a S parameter curve diagram of the planar magic T of the present invention;
FIG. 5 is a VSWR graph of the planar magic T of the present invention;
FIG. 6 is an isolation plot of the planar magic T of the present invention;
fig. 7 is a phase characteristic curve diagram of the planar magic T of the present invention.
Detailed Description
The invention is described in more detail below with reference to the figures and examples.
The invention discloses an ultra-wideband planar magic T, which is shown in a combined figure 1 to a figure 3 and comprises an input port P1, an input port P4, an output port P2, an output port P3, a ground port P5, a ground port P6, a first metal layer 1, a second metal layer 2, a third metal layer 3, a fourth metal layer 4, a connecting through hole V1, a connecting through hole V2, a connecting through hole V3, a connecting through hole V4 and a connecting through hole V5, wherein:
the first metal layer 1, the second metal layer 2, the third metal layer 3 and the fourth metal layer 4 are sequentially arranged from bottom to top;
the front end of the first metal layer 1 is sequentially provided with an output port P3, a ground port P6 and an output port P2 at intervals from left to right, and the rear end of the first metal layer 1 is sequentially provided with an input port P1, a ground port P5 and an input port P4 at intervals from left to right;
a grounding shielding layer GND is arranged on the first metal layer 1;
a transmission line L1, a transmission line L2, a transmission line L3, a transmission line L4, a transmission line L5, a transmission line L6, a coupled line CL1, a coupled line CL2, a loading open-circuit branch T1 and a loading open-circuit branch T2 are arranged on the second metal layer 2;
a coupling line CL3, a coupling line CL6, a coupling line CL7, an open loading branch T3 and an open loading branch T6 are arranged on the third metal layer 3;
a coupling line CL4, a coupling line CL5, a coupling line CL8, an open loading branch T4 and an open loading branch T5 are arranged on the fourth metal layer 4;
the loading open-circuit branch T1 is arranged at the rear side of the loading open-circuit branch T2, the open-circuit loading branch T3 is arranged at the rear side of the open-circuit loading branch T4, the open-circuit loading branch T5 is arranged at the rear side of the open-circuit loading branch T6, the loading open-circuit branches T2 are arranged at the rear side of the open-circuit loading branch T3 at intervals, and the open-circuit loading branch T5 is arranged at the right side of the open-circuit loading branch T3 at intervals;
one end of the transmission line L1 is connected to the input port P1, the other end is connected to the coupling line CL1, one end of the coupling line CL1 is connected to the transmission line L1, the other end is connected to the transmission line L2, one end of the coupling line CL2 is connected to the transmission line L2, the other end is connected to the transmission line L3, the transmission line L2 is connected to the ground shield GND through a connection via V2, the coupling line CL2 and the coupling line CL2 are respectively connected to the loading open-circuit branch T2 and the loading open-circuit branch T2, both the loading open-circuit branch T2 and the loading open-circuit branch T2 are connected to the transmission line L2, one end of the transmission line L2 is connected to the coupling line CL2, the other end is connected to the output port P2, one end of the transmission line L2 is connected to the input port P2, and the other end is connected to the coupling line CL2 through a connection via V2, one end of the transmission line L6 is connected with the coupling line CL6 through the connecting through hole V5, the other end is connected with the output port P2, one end of the coupling line CL3 is connected with the connecting through hole V2, the other end is connected with the coupling line CL7, the junction of the coupling line CL3 and the coupling line CL7 is connected with an open loading branch T3, the junction of the coupling line CL7 and the coupling line CL6 is connected with an open loading branch T6, one end of the coupling line CL6 is connected with the coupling line CL7, the other end is connected with the connecting through hole V5, one end of the coupling line CL4 is connected with the connecting through hole V3, the other end is connected with the coupling line CL8, the junction of the coupling line CL4 and the coupling line CL8 is connected with an open loading branch T4, the junction of the coupling line CL8 and the coupling line CL5 is connected with an open loading branch T5, one end of the coupling line CL5 is connected with the coupling line CL8, the other end of the coupling line CL5 is connected with the connecting through hole V4, and the grounding port P5 and the grounding port P6 are both connected with the grounding shielding layer GND.
In the ultra-wideband planar magic T, a 3-section cascade 3dB and 90-degree hybrid bridge is formed by a coupling line CL3, a coupling line CL4, a coupling line CL5, a coupling line CL6, a coupling line CL7, a coupling line CL8, an open-circuit loading branch T3, an open-circuit loading branch T4, an open-circuit loading branch T5 and an open-circuit loading branch T6; a 90-degree phase shifter is formed by a transmission line L1, a transmission line L2, a transmission line L3, a transmission line L4, a coupled line CL1, a coupled line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2; the phase-shifting channel is formed by a transmission line L1, a transmission line L2, a transmission line L3, a coupling line CL1, a coupling line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2, and the transmission line L4 forms a reference channel to form a magic T structure. Compared with the prior art, the planar magic T has the advantages that the 90-degree phase shifter is combined with the 3-section cascade 3dB and 90-degree hybrid bridge, and the three-dimensional multilayer integrated structure is adopted, so that the planar magic T is more compact in structural layout, smaller in size, lighter in weight and better in reliability.
The test of microwave simulation software HFSS shows that, referring to FIG. 4, the planar magic T has a bandwidth of 5 GHz-13 GHz, covers the high end of the C-band, the low end of the X-band and the Ku-band, and has a very wide bandwidth, referring to FIG. 7, the amplitude imbalance of the sum port and the difference port is less than 0.5dB, the phase imbalance is less than 3 degrees, referring to FIG. 5, the standing-wave ratio of the input port and the output port is less than 1.3, referring to FIG. 6, and the isolation between the ports is greater than 20 dB. Based on the test data, the plane magic T has lower insertion loss and higher isolation, the relative bandwidth can reach 89%, the bandwidth of the plane magic T is further expanded, and the application requirement of ultra-bandwidth is met.
In this embodiment, the input port P1, the input port P4, the output port P2, the output port P3, the ground port P5 and the ground port P6 are all ports with 50-ohm characteristic impedance; the characteristic impedances of the transmission line L1, the transmission line L3, the transmission line L4, the transmission line L5, and the transmission line L6 are all 50 ohms.
Furthermore, a side-edge coupling structure is arranged between the coupling line CL1 and the coupling line CL2, a side-edge dislocation coupling structure is arranged between the coupling line CL3 and the coupling line CL4, a side-edge dislocation coupling structure is arranged between the coupling line CL5 and the coupling line CL6, and a wide-edge coupling structure is arranged between the coupling line CL7 and the coupling line CL 8.
Preferably, the input port P1, the input port P4, the output port P2, the output port P3, the ground port P5, the ground port P6, the first metal layer 1, the second metal layer 2, the third metal layer 3, the fourth metal layer 4, the connecting via V1, the connecting via V2, the connecting via V3, the connecting via V4 and the connecting via V5 are all manufactured and processed by LTCC low temperature co-fired ceramic process.
The invention discloses an ultra-wideband planar magic T, which has the working principle that: the phase shifter part adopts the characteristic of realizing broadband phase shift in a mode of loading short-circuit branches between a section of folding line, and comprises a phase shift part and a reference phase part, wherein the phase shift part is symmetrical about a symmetry plane and comprises a transmission line L1, a transmission line L2, a transmission line L3, a coupled line CL1, a coupled line CL2, a loading open-circuit branch T1, a loading open-circuit branch T2, a connecting through hole V1 and a transmission line L4. The transmission line L4 is a reference phase part, and the phase shift part is composed of a transmission line L1, a transmission line L2, a transmission line L3, a coupled line CL1, a coupled line CL2, a loaded open-circuit branch T1, a loaded open-circuit branch T2 and a connecting through hole V1. The coupling line CL1 and the coupling line CL2 are symmetrical folding lines, and the transmission line L2 is connected with the ground shielding layer GND through the connecting through hole V1 to form a short-circuit branch, so that the broadband phase shifter is realized. The bridge part of the novel ultra-wideband planar magic T is of a three-section symmetrical structure, and is different from a traditional strip line type transmission line, because of the lack of a floor, a single-side grounding medium broadside coupling line can realize larger even-mode impedance and higher coupling degree, the first section and the third section adopt a broadside coupling form, the second section adopts a broadside coupling form, and open-circuit branches are added at different section line width mutation positions to optimize the performance of the coupling line, the ultra-wideband planar magic T comprises a coupling line CL3, a coupling line CL4, an open-circuit loading branch T3, an open-circuit loading branch T4, a coupling line CL7, a coupling line CL8, a coupling line CL5, a coupling line CL6, an open-circuit loading branch T5 and an open-circuit loading branch T6. The first section of side coupling comprises a coupling line CL3, a coupling line CL4, an open loading branch T3 and an open loading branch T4, the second section of wide side coupling comprises a coupling line CL7 and a coupling line CL8, and the third section of side coupling comprises a coupling line CL5, a coupling line CL6, an open loading branch T5 and an open loading branch T6. The phase shifting part of the phase shifter is connected with the first section of side coupling line of the bridge through a connecting through hole V2, the reference phase part of the phase shifter is connected with the third section of side coupling line of the bridge through a connecting through hole V4, and in conclusion, the ultra wide band 90-degree phase shifter and the 3-section cascade 3dB 90-degree hybrid bridge are combined to realize the ultra wide band novel planar magic T.
The invention discloses an ultra-wideband planar magic T, which utilizes a 3-section cascade 3dB and 90-degree hybrid bridge consisting of a coupling line CL3, a coupling line CL4, a coupling line CL5, a coupling line CL6, a coupling line CL7, a coupling line CL8, an open loading branch T3, an open loading branch T4, an open loading branch T5 and an open loading branch T6, combines a 90-degree phase shifter consisting of a transmission line L1, a transmission line L2, a transmission line L3, a transmission line L4, a coupling line CL1, a coupling line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2, and utilizes a phase shifting channel section consisting of a transmission line L1, a transmission line L2, a transmission line L3, a coupling line CL1, a coupling line CL2, a connecting through hole V1, an open loading branch T1 and an open loading branch T2, and a reference channel is formed by a transmission line L4 to form a novel plane magic T, and the multilayer structure of the plane magic T is processed by adopting a low-temperature co-fired ceramic process: the low-temperature co-fired ceramic material and the metal pattern are sintered at the temperature of about 900 ℃, so that the planar magic T is ensured to have very high reliability and temperature stability. In addition, the invention adopts the ceramic material with the dielectric constant of 4.8 and the dielectric loss angle of 0.005, the size is only 13mm multiplied by 5mm multiplied by 1.5mm, and the requirements of small size, small volume and high compactness are better met. Therefore, the ultra-wideband planar magic T makes outstanding progress in the technical field of microwave devices, is suitable for popularization and application in the field, and has good application prospect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the technical scope of the present invention should be included in the scope of the present invention.
Claims (2)
1. An ultra wide band plane magic T which is characterized in that: the circuit comprises an input port P1, an input port P4, an output port P2, an output port P3, a ground port P5, a ground port P6, a first metal layer (1), a second metal layer (2), a third metal layer (3), a fourth metal layer (4), a connecting through hole V1, a connecting through hole V2, a connecting through hole V3, a connecting through hole V4 and a connecting through hole V5, wherein:
the first metal layer (1), the second metal layer (2), the third metal layer (3) and the fourth metal layer (4) are sequentially arranged from bottom to top;
the front end of the first metal layer (1) is sequentially provided with an output port P3, a ground port P6 and an output port P2 at intervals from left to right, and the rear end of the first metal layer (1) is sequentially provided with an input port P1, a ground port P5 and an input port P4 at intervals from left to right;
a grounding shielding layer GND is arranged on the first metal layer (1);
a transmission line L1, a transmission line L2, a transmission line L3, a transmission line L4, a transmission line L5, a transmission line L6, a coupling line CL1, a coupling line CL2, a loading open-circuit branch T1 and a loading open-circuit branch T2 are arranged on the second metal layer (2);
a coupling line CL3, a coupling line CL6, a coupling line CL7, an open loading branch T3 and an open loading branch T6 are arranged on the third metal layer (3);
a coupling line CL4, a coupling line CL5, a coupling line CL8, an open loading branch T4 and an open loading branch T5 are arranged on the fourth metal layer (4);
the loading open-circuit branch T1 is arranged at the rear side of the loading open-circuit branch T2, the open-circuit loading branch T3 is arranged at the rear side of the open-circuit loading branch T4, the open-circuit loading branch T5 is arranged at the rear side of the open-circuit loading branch T6, the loading open-circuit branches T2 are arranged at the rear side of the open-circuit loading branch T3 at intervals, and the open-circuit loading branch T5 is arranged at the right side of the open-circuit loading branch T3 at intervals;
one end of the transmission line L1 is connected to the input port P1, the other end is connected to the coupling line CL1, one end of the coupling line CL1 is connected to the transmission line L1, the other end is connected to the transmission line L2, one end of the coupling line CL2 is connected to the transmission line L2, the other end is connected to the transmission line L3, the transmission line L2 is connected to the ground shield GND through a connection via V2, the coupling line CL2 and the coupling line CL2 are respectively connected to the loading open-circuit branch T2 and the loading open-circuit branch T2, both the loading open-circuit branch T2 and the loading open-circuit branch T2 are connected to the transmission line L2, one end of the transmission line L2 is connected to the coupling line CL2, the other end is connected to the output port P2, one end of the transmission line L2 is connected to the input port P2, and the other end is connected to the coupling line CL2 through a connection via V2, one end of the transmission line L6 is connected with the coupling line CL6 through the connecting through hole V5, the other end is connected with the output port P2, one end of the coupling line CL3 is connected with the connecting through hole V2, the other end is connected with the coupling line CL7, the junction of the coupling line CL3 and the coupling line CL7 is connected with an open loading branch T3, the junction of the coupling line CL7 and the coupling line CL6 is connected with an open loading branch T6, one end of the coupling line CL6 is connected with the coupling line CL7, the other end is connected with the connecting through hole V5, one end of the coupling line CL4 is connected with the connecting through hole V3, the other end is connected with the coupling line CL8, the junction of the coupling line CL4 and the coupling line CL8 is connected with an open loading branch T4, the junction of the coupling line CL8 and the coupling line CL5 is connected with an open loading branch T5, one end of the coupling line CL5 is connected with the coupling line CL8, the other end of the coupling line CL5 is connected with the connecting through hole V4, and the grounding port P5 and the grounding port P6 are both connected with the grounding shielding layer GND;
the input port P1, the input port P4, the output port P2, the output port P3, the ground port P5, the ground port P6, the first metal layer (1), the second metal layer (2), the third metal layer (3), the fourth metal layer (4), the connecting through hole V1, the connecting through hole V2, the connecting through hole V3, the connecting through hole V4 and the connecting through hole V5 are all manufactured and processed by adopting an LTCC low-temperature co-fired ceramic process;
a side edge coupling structure is arranged between the coupling line CL1 and the coupling line CL2, a side edge dislocation coupling structure is arranged between the coupling line CL3 and the coupling line CL4, a side edge dislocation coupling structure is arranged between the coupling line CL5 and the coupling line CL6, and a wide edge coupling structure is arranged between the coupling line CL7 and the coupling line CL 8.
2. The ultra-wideband planar magic T of claim 1, wherein: the input port P1, the input port P4, the output port P2, the output port P3, the ground port P5 and the ground port P6 are all ports with 50-ohm characteristic impedance; the characteristic impedances of the transmission line L1, the transmission line L3, the transmission line L4, the transmission line L5, and the transmission line L6 are all 50 ohms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2017104242342 | 2017-06-07 | ||
| CN201710424234.2A CN107069172A (en) | 2017-06-07 | 2017-06-07 | A kind of ultra wide band novel planar evil spirit T |
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| CN108539353A CN108539353A (en) | 2018-09-14 |
| CN108539353B true CN108539353B (en) | 2020-02-14 |
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| CN107546445A (en) * | 2017-08-21 | 2018-01-05 | 南京理工大学 | A kind of 180 ° of phase shifters of LTCC bilayers miniature broadband |
| CN107517041A (en) * | 2017-08-21 | 2017-12-26 | 南京理工大学 | A kind of balanced type symmetrical coupled low-noise amplifier |
| CN107634301B (en) * | 2017-09-02 | 2020-04-17 | 南京理工大学 | Magic plane T with common mode rejection function |
| WO2023178611A1 (en) * | 2022-03-24 | 2023-09-28 | 清华大学 | Microwave power distribution network and method based on phase-frequency hybrid control |
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| JP5289196B2 (en) * | 2009-06-05 | 2013-09-11 | 京セラ株式会社 | Magic T |
| CN205723900U (en) * | 2016-04-29 | 2016-11-23 | 福州同创微波通讯技术有限公司 | A kind of 180 ° of strip line cavity bridges of large-power broadband |
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| CN107069172A (en) | 2017-08-18 |
| CN108539353A (en) | 2018-09-14 |
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