CN218498350U - Microstrip millimeter wave unidirectional coupler system - Google Patents
Microstrip millimeter wave unidirectional coupler system Download PDFInfo
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- CN218498350U CN218498350U CN202223027863.7U CN202223027863U CN218498350U CN 218498350 U CN218498350 U CN 218498350U CN 202223027863 U CN202223027863 U CN 202223027863U CN 218498350 U CN218498350 U CN 218498350U
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- 238000004891 communication Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 3
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Abstract
The utility model relates to a microstrip millimeter wave single directional coupler system, including coupling part network, II type attenuation network, main transmission line, vice transmission line, main transmission line constitute the coupling microstrip line with vice transmission line, the one end of coupling part network link to each other with the one end of vice transmission line, the other end links to each other with II type attenuation network, the other end of II type attenuation network be coupling port or isolation port. Adopted the utility model discloses a microstrip millimeter wave unidirectional coupler system, microstrip millimeter wave unidirectional coupler can realize the millimeter wave frequency channel and use, still can realize 26.5GHz ~ 43.5 GHz's frequency channel scope, can be arranged in front end equipment in a large number, have extensive range of application.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to the directional coupler field, specifically indicate a microstrip millimeter wave unidirectional coupler system.
Background
With the rapid development of communication technology, the requirements on the performance, function and the like of communication devices are also increasing. The coupler is used as a monitoring device for measuring the transmitting power of the transmitting end of the device, monitoring data such as frequency spectrum and frequency of the transmitting end of the device, measuring the standing-wave ratio and having important functions.
The directional coupler is a radio frequency device widely used in radio frequency system, and its essence is to distribute the power of radio frequency signal according to a certain proportion, and to couple out a part of the radio frequency signal transmitted in the main transmission line for power detection. The directional coupler has the main advantages that the directional coupler can transmit signals in one direction, the input end and the output end are completely isolated from an electric appliance, output signals have no influence on the input end, the anti-interference capability is high, the work is stable, the service life is long, and the transmission efficiency is high.
Electromagnetic waves in the region of 30 to 300GHz (with a wavelength of 1 to 10 mm) are generally referred to as millimeter waves. The millimeter wave has the characteristics of very high usable bandwidth, small frequency band interference, combination with a large-scale array antenna technology and the like, has various advantages of large bandwidth, low time delay, high capacity and the like, and is particularly suitable for industry application with higher requirements on communication speed, time delay and capacity. The millimeter wave has wide development prospect, and can greatly promote the development of the global 5G industry. In the winter Olympic meeting in 2022, 5G millimeter wave technologies are largely applied in China, including media, rail transit, car networking, medical treatment, large stadiums and field management and the like, wherein some application scenes such as real-time rebroadcasting, VR match watching and the like are available, and the combination of communication technologies and industries is fully embodied. And as a microstrip millimeter wave band single directional coupler, be used for in front end equipment in a large number, so the utility model discloses can use in the actual production.
The microstrip millimeter wave unidirectional coupler is a three-port network: the first port is a reflection port; the second port is an input port; the third port is an isolation port (coupled port relative to the first port); the transmission line between the first port and the second port is a main transmission line; the transmission lines of the first port and the third port are sub transmission lines (i.e. coupled lines).
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcoming of above-mentioned prior art, providing a satisfy simple structure, transmission efficiency height, comparatively extensive microstrip millimeter wave unidirectional coupler system of application scope.
In order to achieve the above object, the microstrip millimeter wave unidirectional coupler system of the present invention is as follows:
the microstrip millimeter wave single-directional coupler system is mainly characterized by comprising a coupling part network, a Pi-shaped attenuation network, a main transmission line and an auxiliary transmission line, wherein the main transmission line and the auxiliary transmission line form a coupling microstrip line, one end of the coupling part network is connected with one end of the auxiliary transmission line, the other end of the coupling part network is connected with the Pi-shaped attenuation network, and the other end of the Pi-shaped attenuation network is a coupling port or an isolation port.
Preferably, the system further includes an isolation resistor, one end of the isolation resistor is connected to the coupling microstrip line, and the other end of the isolation resistor is grounded.
Preferably, the system further comprises a frequency increasing network, wherein the frequency increasing network has four ends, two ends of the frequency increasing network are respectively connected with the main transmission line, one end of the frequency increasing network is connected with the isolation resistor, and the other end of the frequency increasing network is grounded.
Preferably, the system further comprises a first rf capacitor connected at the port of the main transmission line.
Preferably, the coupling part network includes a first rf resistor, a second rf resistor and a second rf capacitor, one end of the first rf resistor is connected to the auxiliary transmission line, the other end of the first rf resistor is connected to the second rf capacitor, the other end of the second rf capacitor is connected to the second rf resistor, and the other end of the second rf resistor is grounded.
Preferably, the n-type attenuation network includes a third rf resistor, a fourth rf resistor and a fifth rf resistor, one end of the third rf resistor is connected to the fourth rf resistor, the other end of the third rf resistor is connected to the fifth rf resistor, the other ends of the fourth rf resistor and the fifth rf resistor are both grounded, and the third rf resistor, the fourth rf resistor and the fifth rf resistor form an n-type attenuation network.
Preferably, the isolation resistor includes a sixth rf resistor, a seventh rf resistor and an eighth rf resistor, the sixth rf resistor, the seventh rf resistor and the eighth rf resistor are connected in parallel to form an isolation resistor, one end of the isolation resistor is connected to the frequency increasing network, and the other end is grounded.
Preferably, the frequency increasing network consists of a radio frequency coaxial line, 4 microwave magnetic rings and 4 manganese zinc ferrite magnetic rings, the frequency increasing network is provided with four ports, two ends of the radio frequency coaxial line are respectively connected to the main transmission line, one port is connected with the isolation resistor, and the other port is grounded.
Adopted the utility model discloses a microstrip millimeter wave unidirectional coupler system, microstrip millimeter wave unidirectional coupler can realize the millimeter wave frequency channel and use, still can realize 26.5GHz ~ 43.5 GHz's frequency channel scope, can be arranged in front end equipment in a large number, has extensive range of application.
Drawings
Fig. 1 is a schematic circuit diagram of the microstrip millimeter wave unidirectional coupler system of the present invention.
Fig. 2 is a schematic diagram of the PCB structure of the microstrip millimeter wave unidirectional coupler system of the present invention.
Detailed Description
In order to more clearly describe the technical content of the present invention, the following further description is given with reference to specific embodiments.
The utility model discloses a this microstrip millimeter wave single directional coupler system, including coupling part network, II type attenuation network, isolation resistor, vice transmission line, main transmission line constitute the coupling microstrip line with vice transmission line, the one end of coupling part network link to each other with the one end of vice transmission line, the other end links to each other with II type attenuation network, II type attenuation network's the other end be coupling port or keep apart the port.
As a preferred embodiment of the present invention, the system further includes an isolation resistor, one end of the isolation resistor is connected to the coupling microstrip line, and the other end is grounded.
As the preferred embodiment of the present invention, the system further comprises a frequency increasing network, wherein the frequency increasing network has four ends, two ends of the frequency increasing network are respectively connected to the main transmission line, one end of the frequency increasing network is connected to the isolation resistor, and the other end of the frequency increasing network is grounded.
As a preferred embodiment of the present invention, the system further includes a first rf capacitor, and the first rf capacitor is connected to the port of the main transmission line.
As a preferred embodiment of the present invention, the coupling part network includes a first rf resistor, a second rf resistor and a second rf capacitor, one end of the first rf resistor is connected to the auxiliary transmission line, the other end is connected to the second rf capacitor, the other end of the second rf capacitor is connected to the second rf resistor, and the other end of the second rf resistor is grounded.
As a preferred embodiment of the present invention, the pi-type attenuation network includes a third rf resistor, a fourth rf resistor and a fifth rf resistor, one end of the third rf resistor is connected to the fourth rf resistor, the other end is connected to the fifth rf resistor, the other ends of the fourth and fifth rf resistors are all grounded, and the third, fourth and fifth rf resistors form a pi-type attenuation network.
As the preferred embodiment of the present invention, the isolation resistor includes a sixth rf resistor, a seventh rf resistor and an eighth rf resistor, the sixth rf resistor, the seventh rf resistor and the eighth rf resistor are connected in parallel to form an isolation resistor, one end of the isolation resistor is connected to the frequency increasing network, and the other end is grounded.
As the preferred embodiment of the present invention, the frequency increasing network comprises a radio frequency coaxial line, 4 microwave magnetic rings and 4 manganese zinc ferrite magnetic rings, the frequency increasing network has four ports, the two ends of the radio frequency coaxial line are respectively connected to the main transmission line, one of the ports is connected to the isolation resistor, and the other port is grounded.
The utility model discloses an among the concrete implementation mode, aim at overcomes prior art's shortcoming and not enough, provides a microstrip millimeter wave unidirectional coupler technical method.
The microstrip millimeter wave unidirectional coupler comprises: the main transmission line, the auxiliary transmission line, the coupling part network, the frequency increasing network, the isolation resistor, the Pi-shaped attenuation network, the main transmission line and the auxiliary transmission line form a coupling microstrip line.
Wherein one end of the coupling part network is connected with one end of the auxiliary transmission line, and the other end of the coupling part network is connected with the n-type attenuation network; the other end of the n-shaped attenuation network is a coupling port or an isolation port; one end of the isolation resistor is connected with the coupling microstrip line, and the other end of the isolation resistor is grounded. The frequency increasing network has four ends, two ends are connected with the main transmission line respectively, one end is connected with the isolating resistor, and the other end is grounded.
A first radio frequency capacitor C1 (1, a high-frequency capacitor and 2, a DC blocking protection port) is added at the port of the main transmission line;
the coupling part network comprises a first radio frequency resistor R1, a second radio frequency resistor R2 and a second radio frequency capacitor C2. One end of the first radio-frequency resistor R1 is connected with the auxiliary transmission line, the other end of the first radio-frequency resistor R1 is connected with the second radio-frequency capacitor C2, the other end of the second radio-frequency capacitor C2 is connected with the second radio-frequency resistor R2, and the other end of the second radio-frequency resistor R2 is grounded.
The frequency increasing network T1 comprises radio frequency coaxial lines with the diameter of 1.2mm and the length of 40mm, 4 microwave magnetic rings and 4 manganese zinc ferrite magnetic rings. The frequency increasing network has four ports, wherein two ends of the radio frequency coaxial line are respectively connected to the main transmission line, one port is connected with the isolation resistor, and the other port is grounded.
The isolation resistor comprises a sixth radio frequency resistor R6, a seventh radio frequency resistor R7 and an eighth radio frequency resistor R8. The sixth radio-frequency resistor R6, the seventh radio-frequency resistor R7 and the eighth radio-frequency resistor R8 are connected in parallel to form an isolation resistor, one end of the isolation resistor is connected with the frequency increasing network, and the other end of the isolation resistor is grounded.
The pi-type attenuation network comprises a third radio frequency resistor R3, a fourth radio frequency resistor R4 and a fifth radio frequency resistor R5. One end of the third radio-frequency resistor R3 is connected with the fourth radio-frequency resistor R4, the other end of the third radio-frequency resistor R3 is connected with the fifth radio-frequency resistor R5, the other ends of the fourth radio-frequency resistor R4 and the fifth radio-frequency resistor R5 are grounded, and the third radio-frequency resistor R3, the fourth radio-frequency resistor R4 and the fifth radio-frequency resistor R5 form a Pi-type attenuation network.
The working process of the specific embodiment of the utility model is as follows:
as shown in fig. 1, the rf capacitor: the first and second radio-frequency capacitors C1 and C2 take the value 470nF; a radio frequency resistor: the first radio-frequency resistor R1 takes 255 omega, the second radio-frequency resistor R2 takes 49.9 omega, the third radio-frequency resistor R3 takes 18 omega, the fourth radio-frequency resistor R4 and the fifth radio-frequency resistor R5 take 300 omega, the sixth radio-frequency resistor R6 and the seventh radio-frequency resistor R7 take 27 omega, and the eighth radio-frequency resistor R8 takes 30 omega. The coupler index can be measured in the millimeter wave working frequency band of 26.5 GHz-43.5 GHz.
As shown in fig. 1, the direction of signal transmission from Port2 input to Port1 is forward transmission, and the direction of signal transmission from Port1 input to Port2 is reverse transmission. For the microstrip millimeter wave unidirectional coupler, port2 is an input Port, port1 is a reflection Port, port3 is an isolation Port, and a microwave absorption material is attached near the T1 magnetic ring, so that the numerical value of directivity can be improved.
For a specific implementation scheme of this embodiment, reference may be made to relevant descriptions in the foregoing embodiments, which are not described herein again.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar contents in other embodiments may be referred to for the contents which are not described in detail in some embodiments.
It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Adopted the utility model discloses a microstrip millimeter wave unidirectional coupler system, microstrip millimeter wave unidirectional coupler can realize the millimeter wave frequency channel and use, still can realize 26.5GHz ~ 43.5 GHz's frequency channel scope, can be arranged in front end equipment in a large number, have extensive range of application.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (8)
1. A microstrip millimeter wave single directional coupler system is characterized by comprising a coupling part network, a Pi-shaped attenuation network, a main transmission line and an auxiliary transmission line, wherein the main transmission line and the auxiliary transmission line form a coupling microstrip line, one end of the coupling part network is connected with one end of the auxiliary transmission line, the other end of the coupling part network is connected with the Pi-shaped attenuation network, and the other end of the Pi-shaped attenuation network is a coupling port or an isolation port.
2. The microstrip millimeter wave unidirectional coupler system according to claim 1, further comprising an isolation resistor, wherein one end of the isolation resistor is connected to the coupling microstrip line, and the other end is grounded.
3. The microstrip millimeter wave unidirectional coupler system according to claim 1, further comprising a frequency increasing network having four terminals, wherein two terminals are respectively connected to the main transmission line, one terminal is connected to the isolation resistor, and the other terminal is connected to ground.
4. The microstrip millimeter wave unidirectional coupler system according to claim 1, further comprising a first rf capacitor connected at a port of the main transmission line.
5. The microstrip millimeter wave unidirectional coupler system according to claim 1, wherein the coupling section network comprises a first radio frequency resistor, a second radio frequency resistor and a second radio frequency capacitor, wherein one end of the first radio frequency resistor is connected to the auxiliary transmission line, the other end of the first radio frequency resistor is connected to the second radio frequency capacitor, the other end of the second radio frequency capacitor is connected to the second radio frequency resistor, and the other end of the second radio frequency resistor is grounded.
6. The microstrip millimeter wave unidirectional coupler system according to claim 1, wherein the n-type attenuation network comprises a third radio frequency resistor, a fourth radio frequency resistor and a fifth radio frequency resistor, one end of the third radio frequency resistor is connected with the fourth radio frequency resistor, the other end of the third radio frequency resistor is connected with the fifth radio frequency resistor, the other ends of the fourth radio frequency resistor and the fifth radio frequency resistor are grounded, and the third radio frequency resistor, the fourth radio frequency resistor and the fifth radio frequency resistor form a n-type attenuation network.
7. The microstrip millimeter wave unidirectional coupler system according to claim 2, wherein the isolation resistor comprises a sixth radio frequency resistor, a seventh radio frequency resistor and an eighth radio frequency resistor, the sixth radio frequency resistor, the seventh radio frequency resistor and the eighth radio frequency resistor are connected in parallel to form an isolation resistor, one end of the isolation resistor is connected to the frequency increasing network, and the other end of the isolation resistor is grounded.
8. The microstrip millimeter wave unidirectional coupler system according to claim 3, wherein the frequency increasing network is composed of a radio frequency coaxial line, 4 microwave magnetic rings and 4 Mn-Zn ferrite magnetic rings, the frequency increasing network has four ports, two ends of the radio frequency coaxial line are respectively connected to the main transmission line, one of the ports is connected to the isolation resistor, and the other port is grounded.
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| CN202223027863.7U CN218498350U (en) | 2022-11-15 | 2022-11-15 | Microstrip millimeter wave unidirectional coupler system |
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| CN202223027863.7U CN218498350U (en) | 2022-11-15 | 2022-11-15 | Microstrip millimeter wave unidirectional coupler system |
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| CN218498350U true CN218498350U (en) | 2023-02-17 |
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| CN202223027863.7U Active CN218498350U (en) | 2022-11-15 | 2022-11-15 | Microstrip millimeter wave unidirectional coupler system |
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