A phased array antenna high-power testing device

Abstract

The utility model discloses a kind of phased array antenna high-power testing devices, belong to wireless communication technical field.It include shielded box, the shielded box top is equipped with door body, the shielded box side is equipped with ventilation waveguide window, the shielded box inside is placed with nonmetallic support, the nonmetallic support is for placing phased array antenna to be measured, the shielded box side is equipped with at least two groups of mounting holes, every group The mounting hole is used for installing radio frequency adapter, the shielded box side is equipped with insulating conductive column and avionics interface, the insulating conductive column is set in the side wall of shielded box with mounting hole opposite, the phased array antenna to be measured is connected with external device through radio frequency attenuator.The utility model uses shielded box to replace traditional phased array antenna to carry out wireless conversion wired test in microwave darkroom, not only reduce the cost of construction and test, while small size shielded box, reduce the area occupied, improve the convenience of detection.

Description

Technical Field

[0001] This utility model belongs to the field of wireless communication technology, specifically relating to a high-power testing device for phased array antennas. Background Technology

[0002] With the continuous development of wireless communication technology, phased array antennas are increasingly widely used in various communication systems. During the development and testing of phased array antennas, their performance is significantly affected by material selection and manufacturing processes. How to effectively convert wireless radio frequency signals into wired signals for ground testing has become a pressing issue. Furthermore, existing equipment has certain shortcomings in terms of small size and portability, power tolerance and safety, versatility and ultra-wideband compatibility, high and low temperature test adaptability, and cost-effectiveness, failing to fully meet the testing requirements for high-power signals from phased array antennas. Therefore, designing a test chamber that can perform cost-effective, safe, and accurate wireless-to-wired conversion testing is particularly important. Utility Model Content

[0003] Purpose of the utility model: To provide a high-power testing device for phased array antennas, which solves the above-mentioned problems existing in the prior art.

[0004] Technical Solution: A high-power phased array antenna testing device includes a shielded box with a door on top and ventilation waveguide windows on the side. A non-metallic support is placed inside the shielded box to hold the phased array antenna under test. At least two sets of mounting holes are provided on the side of the shielded box, each set for mounting an RF adapter. Insulating conductive posts and avionics interfaces are installed on the side of the shielded box, with the insulating conductive posts opposite to the mounting holes on the side wall. The phased array antenna under test is connected to external equipment via an RF attenuator.

[0005] Preferably, the shielding box includes a metal shell, the inner wall of which is covered with a wave-absorbing layer, and a metal polarized antenna is installed on the side of the metal shell, the metal polarized antenna penetrating the wave-absorbing layer.

[0006] Preferably, the absorbing layer is made of a flame-retardant, power-resistant pyramidal material with a thickness of 150 mm, a reflectivity range of -20 dB@1 to -50 dB@40 GHz, a power tolerance of 5000 W / m², and an operating temperature of -45℃ to 100℃.

[0007] Preferably, the shielding box weighs less than or equal to 50 kg, operates in the frequency band of 1-40 GHz, has an internal and external isolation of ≥60 dB, and the phased array antenna has an equivalent omnidirectional radiated power of ≥67 dBm.

[0008] Preferably, the ventilation waveguide window is a ventilation waveguide window with a size of 300mm×300mm@3.2mm or larger, and its shielding effectiveness is greater than 60dB@L-Ka band.

[0009] Preferably, the radio frequency adapter uses an SMA type radio frequency adapter with a flange and a 2.92mm double female radio frequency adapter.

[0010] Preferably, the phased array antenna under test covers the 1-40 GHz range.

[0011] Beneficial effects: This utility model relates to a high-power testing device for phased array antennas;

[0012] 1. Using a shielded box instead of a traditional phased array antenna to conduct wireless-to-wired tests in a microwave anechoic chamber not only reduces construction and testing costs, but also improves the convenience of testing due to the small size of the shielded box, which reduces the area occupied.

[0013] 2. By installing an absorbing layer inside the metal casing, the frequency band is shielded, external interference is blocked, the leakage and absorption of antenna radiated energy are reduced, and the test accuracy is improved.

[0014] 3. By opening ventilation waveguide windows on the side of the shielded box and installing non-metallic brackets inside the shielded box, heat dissipation and adjustment of the antenna under test during long-term testing can be ensured, and the operation is simple. Attached Figure Description

[0015] Figure 1 This is a schematic block diagram of the testing device of this utility model;

[0016] Figure 2 This is a front view of the testing device of this utility model;

[0017] Figure 3 This is a left view of the testing device of this utility model;

[0018] Figure 4 An elevation view of the testing device of this utility model;

[0019] Figure 5 This is a diagram showing the attenuation distribution of reflected energy at the phased array antenna surface of this utility model.

[0020] Figures 1 to 4 The attached diagram is labeled as follows: 1. Shielding box; 2. Door; 3. Ventilation waveguide window; 4. Non-metallic bracket; 5. Phased array antenna; 6. Insulating conductive column; 7. Avionics interface; 8. Radio frequency adapter;

[0021] 11. Metal shell; 12. Absorbing layer; 13. Metal polarized antenna. Detailed Implementation

[0022] like Figures 1 to 5 As shown, this utility model provides a technical solution for a high-power phased array antenna testing device: a high-power phased array antenna testing device, including a shielded box, a ventilated waveguide window, and a door. The shielded box has dimensions no greater than 1200mm×900mm×900mm, operates in a frequency band covering 1-40GHz, has an internal and external isolation ≥60dB, a power level reflected to the product terminal ≤20dBm, can withstand an experimental ambient temperature of -45℃ to 100℃, and has a single full-power test time ≥100 minutes. The door is rotatably mounted on the shielded box. At the top opening, ventilation waveguide windows are located on the side of the shielding box. These windows are 300mm x 300mm @ 3.2mm in size and have a shielding effectiveness greater than 60dB @ L-Ka band. Inside the shielding box is a non-metallic support made of nylon. To ensure stable placement of the phased array antenna under test, mounting slots are provided on the top surface of the non-metallic support to hold the antenna and prevent it from tipping over. The non-metallic support is used to hold the phased array antenna under test. The antenna, the phased array antenna under test, covers the 1-40GHz range. At least two sets of mounting holes are provided on the side of the shielded enclosure. In this embodiment, two sets of mounting holes are provided on the side of the shielded enclosure. Each set of mounting holes is used to install an RF adapter. The RF adapter uses an SMA type RF adapter with a flange and a 2.92mm dual-cathode RF adapter. Insulating conductive posts and avionics interfaces are installed on the side of the shielded enclosure. The insulating conductive posts are positioned opposite the mounting holes on the side wall of the shielded enclosure. The phased array antenna under test is connected to external equipment through an RF attenuator. The shielding enclosure consists of a metal shell, the inner walls of which are fitted with absorbing layers. These absorbing layers are made of flame-retardant, power-resistant pyramidal material with a thickness of 150mm. The reflectivity range is -20dB@1 to -50dB@40GHz, the withstand power is 5000W / m², and the operating temperature is -45℃ to 100℃. The absorbing material located in the near-field region of the phased array antenna under test has a power withstand capability of 4000W / m² less than the absorbing surface material. The selected materials meet the safe power requirements, and the power withstand capability calculation formula is as follows:

[0023] ;

[0024] At least one set of metal-polarized antennas is mounted on the side of the metal shell. In this embodiment, two sets of metal-polarized antennas are provided. The metal-polarized antennas penetrate the absorbing layer. The shielding box operates in the frequency band of 1-40GHz, with an internal and external isolation of ≥60dB. The phased array antenna has an equivalent isotropic radiated power greater than or equal to 67dBm. The formula for calculating the attenuation level of reflected energy is as follows:

[0025] ;

[0026] In the formula: Ratφ represents the reflection loss of the absorbing material; Gatθ represents the antenna directivity; Rloss represents the reflection path loss; its energy attenuation at the array surface is ≥51dB. Figure 5 The table provides the energy attenuation distribution of a 160mm*160mm phased array antenna surface, and the power level reflected to the 160mm phased array surface is ≤67-51≤16dBm, which meets the requirement of not exceeding 20dBm.

[0027] In a further embodiment, such as Figure 4 As shown, two sets of mounting holes are opened on the side of the shielding box. Each set of mounting holes is used to install RF adapters, namely four antennas in two sets (left-hand and right-hand rotation), which are arranged in a cross shape and installed on the side of the shielding box to meet the requirements of various polarization signal transmission and reception tests within the 1-40GHz range.

[0028] The specific specifications of the transmit / receive circularly polarized antenna 1 include: operating frequency: 1-18GHz; gain (Typ): 2dB; polarization: left-hand circular polarization; axial ratio: ≤3; and operating temperature: -45℃~100℃.

[0029] The specific specifications of the transceiver circularly polarized antenna 2 include: operating frequency: 1-18GHz; gain (Typ): 2dB; polarization: right-hand circular polarization; axial ratio: ≤3; and operating temperature: -45℃~100℃.

[0030] The specific specifications of the transmit / receive circularly polarized antenna 3 include: operating frequency: 18-40GHz; gain (Typ): 0dB; polarization: left-hand circular polarization; axial ratio: ≤3; standing wave ratio: ≤2; operating temperature: -45℃~100℃.

[0031] The specific specifications of the transmit / receive circularly polarized antenna 4 include: operating frequency: 18-40GHz; gain (Typ): 0dB; polarization: right-hand circular polarization; axial ratio: ≤3; and operating temperature: -45℃~100℃.

[0032] Through the above technical solution, this utility model can achieve the following working process:

[0033] The phased array antenna under test is placed on a non-metallic bracket and connected to an external device via an RF connector and an RF attenuator to perform testing. At the same time, by installing an absorbing layer inside the metal shell, external interference is shielded when testing the phased array antenna, reducing the leakage and absorption of the antenna's radiated energy and improving the test accuracy. Furthermore, full polarization test signal coverage of the 1-40GHz ultra-wide frequency band is achieved by using different circularly polarized antennas.

[0034] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A high-power testing device for phased array antennas, characterized in that, The system includes a shielded enclosure with a door on top and ventilation waveguide windows on the sides. Inside the enclosure is a non-metallic support for mounting the phased array antenna under test. At least two sets of mounting holes are provided on the sides of the enclosure, each set for mounting an RF adapter. Insulating conductive posts and avionics interfaces are mounted on the sides of the enclosure, with the insulating conductive posts opposite the mounting holes on the sidewalls. The phased array antenna under test is connected to external equipment via an RF attenuator.

2. The high-power phased array antenna testing device according to claim 1, characterized in that, The shielding box includes a metal shell, the inner wall of which is covered with a wave-absorbing layer, and at least one set of metal-polarized antennas are installed on the side of the metal shell, the metal-polarized antennas penetrating the wave-absorbing layer.

3. The high-power phased array antenna testing device according to claim 2, characterized in that, The absorbing layer is made of flame-retardant and power-resistant pyramidal material with a thickness of 150 mm, a reflectivity range of -20 dB@1 to -50 dB@40 GHz, a power tolerance of 5000 W / m², and an operating temperature of -45℃ to 100℃.

4. The high-power phased array antenna testing device according to claim 3, characterized in that, The shielding box operates in the 1-40GHz frequency band, has an internal and external isolation of ≥60dB, and the phased array antenna has an equivalent omnidirectional radiated power of ≥67dBm.

5. The high-power testing device for a phased array antenna according to claim 1, characterized in that, The ventilation waveguide window is 300mm×300mm@3.2mm or larger, and its shielding effectiveness is greater than 60dB@L-Ka band.

6. The high-power phased array antenna testing device according to claim 1, characterized in that, The radio frequency adapter uses an SMA type radio frequency adapter with a flange and a 2.92mm double female radio frequency adapter.

7. The high-power phased array antenna testing device according to claim 1, characterized in that, The phased array antenna under test covers the 1-40 GHz range.

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