Case adopting dual-port radio frequency receiving module

Abstract

The utility model provides a case adopting a dual-port radio frequency receiving module, which mainly adopts the dual-port radio frequency receiving module, and two radio frequency measuring ports, two radio frequency reference ports and a local oscillator input port are arranged on a metal shell of the dual-port radio frequency receiving module. Two intermediate frequency measurement modules and two intermediate frequency reference modules are integrated in the metal shell, the radio frequency measurement ports and the radio frequency reference ports are used for accessing radio frequency signals, the local oscillator input port is used for accessing local oscillator signals, the intermediate frequency measurement modules are connected with the corresponding radio frequency measurement ports, and the intermediate frequency reference modules are connected with the local oscillator input port. The intermediate frequency reference module is connected with the corresponding radio frequency reference port, the local oscillator input port is divided into four receiving channels through the power division module, and the four receiving channels are connected with the corresponding intermediate frequency measurement module and the intermediate frequency reference module. And the intermediate frequency measurement module and the intermediate frequency reference module respectively carry out frequency mixing processing on the received corresponding radio frequency signals and local oscillation signals and output corresponding intermediate frequency signals.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency reception, and particularly relates to a chassis adopting a dual-port radio frequency reception module. Background Art

[0002] In a vector network analyzer, the radio frequency reception module is generally set as a single-port reception, where one port is used to receive one source. Currently, a vector network analyzer with four ports has been proposed. When using a single-port radio frequency reception module for the four ports, each single-port radio frequency reception module is integrated in a housing. During actual use, the internal resistance of the single-port device on the housing will affect the port power due to temperature, and different housings may have different heating temperatures due to external factors such as the position setting of the heat dissipation components, making it difficult to accurately judge the stability of radio frequency signal reception. Content of the Utility Model

[0003] The purpose of the utility model is to provide a chassis adopting a dual-port radio frequency reception module, which mainly uses a dual-port radio frequency reception module, integrates the dual-port device in the same metal housing, and ensures that the dual-port device is at the same temperature, so as to accurately judge the stability of radio frequency signal reception.

[0004] To solve the above technical problems, the utility model adopts the following solutions:

[0005] A chassis adopting a dual-port radio frequency reception module includes a box body. A dual-port radio frequency reception module is fixedly arranged at the bottom of the box body. Two radio frequency measurement ports, two radio frequency reference ports, and one local oscillator input port are arranged on the metal outer housing of the dual-port radio frequency reception module. Two intermediate frequency measurement modules and two intermediate frequency reference modules are integrated in the metal housing;

[0006] The intermediate frequency measurement module is connected to the corresponding radio frequency measurement port, and the intermediate frequency reference module is connected to the corresponding radio frequency reference port. The local oscillator input port is divided into four receiving channels through a power splitter module. The four receiving channels are connected to the corresponding intermediate frequency measurement module and intermediate frequency reference module, so that the intermediate frequency measurement module and the intermediate frequency reference module respectively mix the received corresponding radio frequency signal with the local oscillator signal and output the corresponding intermediate frequency signal.

[0007] Further, the power splitter module includes a first power splitter, a second power splitter, and a third power splitter. The receiving end of the first power splitter is connected to the local oscillator input port. The output end of the first power splitter is respectively connected to the second power splitter and the third power splitter. The output end of the second power splitter is respectively connected to an intermediate frequency measurement module A and an intermediate frequency reference module A. The output end of the third power splitter is respectively connected to an intermediate frequency measurement module B and an intermediate frequency reference module B, forming four receiving channels.

[0008] Further, mixers are included in both the intermediate frequency measurement module and the intermediate frequency reference module. Through the mixers, the corresponding radio frequency signals can be mixed with the local oscillator signals to generate intermediate frequency signals of 2.6M - 10.8M.

[0009] Further, the local oscillator input port inputs local oscillator signals to the corresponding intermediate frequency measurement module and intermediate frequency reference module, and the input local oscillator signals are successively divided into four paths through an amplifier, an equalizer, a power divider, and an attenuator and input into the corresponding intermediate frequency measurement module and intermediate frequency reference module.

[0010] Further, a fixing bracket is fixedly arranged on the bottom plate of the box body. The fixing bracket is an arch-shaped bracket, and the arch-shaped bracket is fixed to the bottom plate by screws. The inner side of the arch-shaped bracket is closely attached to the two metal outer shells, and the two metal outer shells are closely attached to each other. Moreover, the arch-shaped bracket extends along the connection center line of the two metal outer shells.

[0011] Further, first fixing parts are symmetrically arranged on the top of the metal outer shell, and second fixing parts are symmetrically arranged on both sides of the metal outer shell. Screw holes are formed in both the first fixing parts and the second fixing parts, and screws can be connected in the screw holes. The first fixing parts on the two metal outer shells and the second fixing parts on the two metal outer shells are respectively locked and fixed through the cooperation of the screws and nuts.

[0012] Further, the same sides of the first fixing parts and the second fixing parts on the metal outer shell are arranged close to one side of the metal outer shell. When the two metal outer shells are closely attached to each other, the first fixing parts on the two metal outer shells and the second fixing parts on the two metal outer shells are closely attached to each other, and the arch-shaped bracket is attached to the first fixing parts and the second fixing parts.

[0013] Further, a protective bracket is further included. The protective bracket is located on the arch-shaped bracket, that is, the protective bracket is located on the first fixing part. The protective bracket is provided with a downward-opening groove, and the first fixing part is embedded in the groove. Moreover, the protective bracket is locked and fixed to the arch-shaped bracket by screws.

[0014] Advantages of the present utility model:

[0015] The present utility model provides a chassis adopting a dual-port radio frequency receiving module, mainly adopting the dual-port radio frequency receiving module, integrating the dual-port device in the same metal shell, ensuring that the dual-port device is at the same temperature, so as to accurately judge the stability of radio frequency signal reception.

[0016] Moreover, when applying the dual-port RF receiving module to a chassis which is a four-port chassis, two dual-port RF receiving modules are closely attached together, fixed by a fixing bracket, and protected. Description of the Drawings

[0017] Figure 1 Schematic diagram of integrated devices in the single-port RF receiving module in Embodiment 1 of the present utility model;

[0018] Figure 2 Schematic diagram of integrated devices in the dual-port RF receiving module in Embodiment 1 of the present utility model;

[0019] Figure 3 Schematic diagram of the dual-port RF receiving module in Embodiment 1 of the present utility model;

[0020] Figure 4 Schematic diagram of the metal outer casing in Embodiment 2 of the present utility model;

[0021] Figure 5 Schematic diagram of the fixing bracket in Embodiment 2 of the present utility model;

[0022] Figure 6 Schematic diagram of the protection bracket in Embodiment 2 of the present utility model;

[0023] Description of the reference numerals: 1 - metal outer casing, 2 - power interface, 3 - local oscillator input port, 4 - local oscillator output port, 5 - RF measurement port, 51 - RF measurement port A, 52 - RF measurement port B, 6 - RF reference port, 61 - RF reference port A, 62 - RF reference port B, 7 - intermediate frequency measurement module, 71 - intermediate frequency measurement module A, 72 - intermediate frequency measurement module B, 8 - intermediate frequency reference module, 81 - intermediate frequency reference module A, 82 - intermediate frequency reference module B, 9 - mixer, 10 - power divider, 11 - first fixing part, 12 - second fixing part, 101 - fixing bracket, 102 - screw, 103 - protection bracket Detailed Embodiments

[0024] To enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments, but the embodiments of the present utility model are not limited thereto.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "provided with", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments:

[0028] Embodiment 1

[0029] Since, in a vector network analyzer, the radio frequency receiving module is generally set to single-port reception, one port is used to receive one source, and currently, a vector network analyzer with four ports is proposed. When a single-port radio frequency receiving module is used for the four ports, each single-port radio frequency receiving module is integrated in a housing. As Figure 1 shown, the housing integrates a power supply interface 2, a local oscillator input port 3, a radio frequency measurement port 5, a radio frequency reference port 6, an intermediate frequency measurement module 7, an intermediate frequency reference module 8, a mixer 9, and a power divider 10. In the single-port radio frequency receiving module, a power divider 10 is used to divide into two receiving channels, and the two receiving channels are respectively connected to an intermediate frequency measurement module 7 and an intermediate frequency reference module 8. Then, the intermediate frequency measurement module 7 and the intermediate frequency reference module 8 will respectively perform mixing processing on the received radio frequency signal and the local oscillator signal and output corresponding intermediate frequency measurement signals and intermediate frequency reference signals.

[0030] Among them, it is necessary to judge the stability of the radio frequency receiving module by the ratio of the intermediate frequency measurement signal and the intermediate frequency reference signal. However, in the actual use process, the internal resistance of the single-port device will affect the port power due to the temperature inside the housing.

[0031] When a single-port RF receiving module is used on a vector network analyzer with four ports, since a single-port device is integrated in a housing, different housings may have different temperatures inside due to external factors such as the position setting of the heat dissipation components. Therefore, it is difficult to accurately judge the stability of RF signal reception based on the ratio of the intermediate frequency measurement signal to the intermediate frequency reference signal.

[0032] To solve the above problems, the present utility model provides a dual-port RF receiving module. The dual-port device of the dual-port RF receiving module is integrated in the same metal housing. As Figure 2 shown, a power interface 2, a local oscillator input port 3, a local oscillator output port 4, an RF measurement port A51, an RF reference port A61, an RF measurement port B52, an RF reference port B62, an intermediate frequency measurement module A71, an intermediate frequency reference module A81, an intermediate frequency measurement module B72, an intermediate frequency reference module B82, and a power splitter module are integrated in the metal housing. Specifically, the RF measurement port A51, the RF reference port A61, the RF measurement port B52, and the RF reference port B62 are all used to access RF signals. The local oscillator input port 3 is used to access a local oscillator signal. The RF measurement port A51 is connected to the intermediate frequency measurement module A71, the RF measurement port B52 is connected to the intermediate frequency measurement module B72, the RF reference port A61 is connected to the intermediate frequency reference module A81, and the RF reference port B62 is connected to the intermediate frequency reference module B82, so that the intermediate frequency measurement module 7 and the intermediate frequency reference module 8 both receive corresponding RF signals.

[0033] Moreover, since the dual-port device of the dual-port RF receiving module is integrated in the same metal housing, the power splitter module mainly includes three power splitters, and the three power splitters are connected in a progressive manner. Specifically, the receiving end of the first power splitter is connected to the local oscillator input port 3, the output end of the first power splitter is respectively connected to the second power splitter and the third power splitter, and the output end of the second power splitter is respectively connected to an intermediate frequency measurement module A71 and an intermediate frequency reference module A81, and the output end of the third power splitter is respectively connected to an intermediate frequency measurement module B72 and an intermediate frequency reference module B82. The input local oscillator signal is divided into four paths by the three power splitters to form four receiving channels.

[0034] The four receiving channels are respectively connected to the intermediate frequency measurement module A71, the intermediate frequency reference module A81, the intermediate frequency measurement module B72, and the intermediate frequency reference module B82, and then the RF measurement port A51, the RF reference port A61, the RF measurement port B52, and the RF reference port B62 are respectively connected to the corresponding intermediate frequency measurement module A71, intermediate frequency reference module A81, intermediate frequency measurement module B72, and intermediate frequency reference module B82. As Figure 3As shown, the intermediate frequency measurement module A71, the intermediate frequency reference module A81, the intermediate frequency measurement module B72, and the intermediate frequency reference module B82 respectively perform mixing processing on the received radio frequency signal and the local oscillator signal and output the corresponding intermediate frequency signals 1, intermediate frequency signal 2, intermediate frequency signal 3, and intermediate frequency signal 4. Then, the stability of the dual-port radio frequency receiving module can be judged by the ratio of different intermediate frequency signals.

[0035] Specifically, the intermediate frequency measurement module A71, the intermediate frequency reference module A81, the intermediate frequency measurement module B72, and the intermediate frequency reference module B82 all include a mixer 9. Through the mixer 9, the corresponding radio frequency signal and the local oscillator signal can be mixed and processed to generate an intermediate frequency signal of 2.6M - 10.8M.

[0036] Moreover, the local oscillator input port 3 can divide the input local oscillator signal of 10M - 50GHz into four paths through a power splitting module after passing through an amplifier, an equalizer, a power splitter, and an attenuator, and provide the required local oscillator signals for the four receiving channels. Among them, the attenuator can be used to increase the channel isolation.

[0037] Based on the above, in this embodiment, the input signal of the receiving channel is 10M - 50GHz. The low-noise amplifier selected is the ultra-wideband amplifier CGY2144UH / C2 of OMMIC. This amplifier has a frequency coverage of DC - 54GHz, a gain of 13dB, and an output P-1 greater than +8dBm. In order to prevent the output power of the low-noise amplifier from being compressed, a 5dB attenuator needs to be added in front of the low-noise amplifier. Here, we select the 5dB attenuator HH-AT50-5 of HiWafer, with a frequency range covering DC - 50GHz, meeting the design requirements.

[0038] The mixer 9 in the receiving channel selects the ultra-wideband active mixer 91GC1-8068 of Agilent. This mixer 9 has an RF frequency of DC - 50GHz, an LO frequency of DC - 50GHz, an IF frequency of DC - 1G, a conversion loss of 5.5dB@26.5GHz, 8dB@50GHz, is powered by -6V, has a current of 75mA, and an IP-1 greater than +5dBm when the RF input frequency is DC - 26.5GHz, and an IP-1 greater than 0dBm when the RF input frequency is 26.5GHz - 50GHz. The radio frequency input signal frequency of this receiving channel is 10MHz - 50GHz, and the intermediate frequency output is 2.6M - 10.8M. The operating frequency of this mixer 9 covers this frequency range and can meet the design requirements.

[0039] Moreover, in order to prevent the output power of the low-noise amplifier from exceeding the 1dB power compression point of the 1GC1-8068 mixer 9, a 7dB attenuator needs to be added in front of the mixer 9.

[0040] Embodiment 2

[0041] Based on the above-mentioned Embodiment 1, in this embodiment, the dual-port RF receiving module described in Embodiment 1 is applied to a four-port chassis. To meet the requirements of the four ports, two dual-port RF receiving modules need to be set in the chassis. In this embodiment, as Figure 4 shown, on the top of the metal housing 1 of the dual-port RF receiving module, first fixing parts 11 are symmetrically arranged, and on both sides of the metal housing 1, second fixing parts 12 are symmetrically arranged. Screw holes are formed in both the first fixing parts 11 and the second fixing parts 12, and screws 102 can be connected in the screw holes, which is convenient for tightly fitting two dual-port RF receiving modules together, facilitating fixation and conducting heat dissipation.

[0042] Specifically, in this embodiment, a fixing bracket 101 is fixedly arranged on the bottom plate of the box body. As Figure 5 shown, the fixing bracket 101 is an arch-shaped bracket, and the arch-shaped bracket is fixed to the bottom plate by screws 102. Two dual-port RF receiving modules are fixedly arranged inside the arch-shaped bracket, and the two dual-port RF receiving modules are tightly fitted together. The first fixing parts 11 and the second fixing parts 12 on the two metal housings 1 are respectively locked and fixed through the cooperation of screws 102 and nuts. Moreover, the inner side of the arch-shaped bracket is tightly fitted with the two metal housings 1, and the arch-shaped bracket extends along the connection midline of the two metal housings 1, surrounding the top and the left and right sides of the two metal housings 1.

[0043] Moreover, the same sides of the first fixing parts 11 and the second fixing parts 12 on the metal housing 1 are arranged close to one side of the metal housing 1. When the two metal housings 1 are tightly fitted together, the first fixing parts 11 and the second fixing parts 12 on the two metal housings 1 are tightly fitted together, and the arch-shaped bracket is fitted on the first fixing parts 11 and the second fixing parts 12. As Figure 5 shown, the extending direction of the arch-shaped bracket from left to right sequentially passes through the second fixing part 12, the first fixing part 11, the first fixing part 11, and the second fixing part 12, and both sides of the arch-shaped bracket have side plates parallel to the bottom plate, and the side plates are fixed to the bottom plate by screws 102.

[0044] Preferably, a protective bracket 103 is further included. As Figure 6 shown, the protective bracket 103 is located on the arch-shaped bracket, that is, the protective bracket 103 is located on the first fixing part 11. The protective bracket 103 is provided with a downward-opening groove, and the first fixing part 11 is embedded in the groove. Moreover, the protective bracket 103 is locked and fixed to the arch-shaped bracket by screws 102, and the protective bracket 103 can be fixed to the top plate at the top of the box body, so that the arch-shaped bracket can be protected from vibration.

[0045] It is understandable that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present utility model. However, the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.

Claims

1. A chassis using a dual-port radio frequency receiving module, characterized in that: It comprises a box body, a dual-port radio frequency receiving module is fixedly arranged at the bottom of the box body, two radio frequency measurement ports, two radio frequency reference ports and a local oscillator input port (3) are arranged on the metal shell body (1) of the dual-port radio frequency receiving module, and two intermediate frequency measurement modules and two intermediate frequency reference modules are integrated in the metal shell body; The intermediate frequency measurement module is connected to the corresponding radio frequency measurement port, the intermediate frequency reference module is connected to the corresponding radio frequency reference port, and the local oscillator input port (3) is divided into four receiving channels by a power division module, and the four receiving channels are connected to the corresponding intermediate frequency measurement module and the intermediate frequency reference module, so that the intermediate frequency measurement module and the intermediate frequency reference module respectively mix the received corresponding radio frequency signal with the local oscillator signal and output the corresponding intermediate frequency signal.

2. A chassis using a dual-port radio frequency receiving module according to claim 1, characterized in that: The power division module comprises a first power divider, a second power divider and a third power divider, wherein the receiving end of the first power divider is connected to the local oscillator input port (3), the output end of the first power divider is respectively connected to the second power divider and the third power divider, and the output end of the second power divider is respectively connected to an intermediate frequency measurement module A (71) and an intermediate frequency reference module A (81), and the output end of the third power divider is respectively connected to an intermediate frequency measurement module B (72) and an intermediate frequency reference module B (82), thereby forming four receiving channels.

3. The chassis using a dual-port radio frequency receiving module according to claim 1, characterized in that: The intermediate frequency measurement module and the intermediate frequency reference module both include a mixer (9), through which the corresponding radio frequency signal and the local oscillator signal can be mixed to generate an intermediate frequency signal of 2.6M-10.8M.

4. The chassis using a dual-port radio frequency receiving module according to claim 1, characterized in that: The local oscillator input port (3) inputs a local oscillator signal to the corresponding intermediate frequency measurement module and intermediate frequency reference module, and the input local oscillator signal is divided into four paths through an amplifier, an equalizer, a power divider, and an attenuator and input into the corresponding intermediate frequency measurement module and intermediate frequency reference module.

5. The chassis using a dual-port radio frequency receiving module according to claim 1, characterized in that: A fixing bracket (101) is fixedly arranged on the bottom plate of the box body, the fixing bracket (101) is an arch-shaped bracket, and the arch-shaped bracket is fixed to the bottom plate by screws (102), the inner side of the arch-shaped bracket is tightly fitted with the two metal outer shells (1), the two metal outer shells (1) are tightly fitted with each other, and the arch-shaped bracket extends along the connecting center line of the two metal outer shells (1).

6. A chassis using a dual-port radio frequency receiving module according to claim 5, characterized in that: A first fixing portion (11) is symmetrically arranged on the top of the metal outer shell (1), and second fixing portions (12) are symmetrically arranged on both sides of the metal outer shell (1). Screw holes are provided in the first fixing portion (11) and the second fixing portion (12), and screws (102) can be connected in the screw holes. The first fixing portions (11) and the second fixing portions (12) on the two metal outer shells (1) are locked and fixed respectively by the cooperation of the screws (102) and nuts.

7. The chassis using a dual-port radio frequency receiving module according to claim 6, characterized in that: The same side surfaces of the first fixing portion (11) and the second fixing portion (12) on the metal outer shell (1) are both arranged in contact with one side of the metal outer shell (1); when the two metal outer shells (1) are tightly fitted, the first fixing portions (11) and the second fixing portions (12) on the two metal outer shells (1) are tightly fitted, and the arch-shaped bracket is fitted on the first fixing portion (11) and the second fixing portion (12).

8. The chassis using a dual-port radio frequency receiving module according to claim 7, characterized in that: The protective bracket (103) is also included. The protective bracket (103) is located on the arch-shaped bracket. The protective bracket (103) is located on the first fixing portion (11). The protective bracket (103) is provided with a groove opening downward, and the first fixing portion (11) is embedded in the groove. The protective bracket (103) is locked and fixed to the arch-shaped bracket by screws (102).

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