CN113113772A

CN113113772A - Waveguide antenna adapter for satellite wireless test

Info

Publication number: CN113113772A
Application number: CN202110375735.2A
Authority: CN
Inventors: 李春晖; 陆琳; 吴杰; 韩伟强; 江虹; 张顺波
Original assignee: Shanghai Spaceflight Institute of TT&C and Telecommunication
Current assignee: Shanghai Spaceflight Institute of TT&C and Telecommunication
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-07-13
Anticipated expiration: 2041-04-06
Also published as: CN113113772B

Abstract

The invention provides a waveguide antenna adapter for satellite wireless test, which comprises: a polarization transmission waveguide, a waveguide assembly, and a fixture. The polarization transmission waveguide is of a waveguide type structure and transmits radio frequency wireless signals through the waveguide; the polarization transmission waveguide is provided with a first external interface and a second external interface; the first external interface is connected with a waveguide type antenna of a satellite; the size of the first external interface is matched with that of a polarized waveguide interface of the waveguide type antenna; and after the first external interface is connected with the polarized waveguide port of the waveguide antenna, the polarized transmission waveguide shields an antenna radiator outside the polarized waveguide port of the waveguide antenna. The polarization transmission waveguide has the function of a polarizer, and the polarization mode is the same as that of a waveguide type antenna; the waveguide assembly is used for connecting the polarization transmission waveguide with a ground test system; the fixing device is used for connecting and fixing the waveguide antenna adapter and the waveguide type antenna on the satellite.

Description

Waveguide antenna adapter for satellite wireless test

Technical Field

The invention relates to the technical field of satellite system ground wireless testing, in particular to a waveguide antenna adapter for satellite system ground wireless testing.

Background

In the development of satellite engineering, a satellite system-level wireless test needs to be carried out in the development stage. There is a need to develop terrestrial antennas for transceiving communications with antennas on satellites.

During the wireless test, due to the electromagnetic wave radiation, on one hand, the influence on the surrounding environment exists during the test, certain harm is caused to field personnel, and the personnel need to leave the field during the test; on the other hand, during wireless testing, if there are more metal type devices in the surrounding environment, there will be a certain influence on the accuracy of wireless testing.

At present, the known satellite ground wireless test is carried out by two means; 1) the irrelevant equipment is cleaned on site, a large enough free space is reserved, and the influence of the surrounding environment on the satellite test is reduced; in addition, field personnel are cleared during testing, and injury to personnel is prevented. 2) A large wave absorbing wall or a semi-open wave absorbing darkroom is designed and processed, and the wave absorbing darkroom is placed in the radiation direction of a satellite antenna during wireless test, so that the influence on the surrounding environment is reduced.

With the adoption of the scheme, the scheme 1 has the following defects: the wireless test condition is easily limited by the external environment, and the test time and the test progress are difficult to guarantee; the scheme 2 has the following disadvantages: the wave-absorbing wall has high development cost, difficult transportation and storage, high requirement on the field and inconvenient use.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a waveguide antenna adapter for satellite wireless test, which is characterized in that when a satellite is tested wirelessly, a radio frequency signal transmitted by an antenna on a satellite is directly transmitted to the waveguide antenna adapter when being radiated to an external space, and the wireless test is essentially converted into a wired test. The requirements on the surrounding environment are greatly reduced.

In order to solve the above problems, the present invention provides a waveguide antenna adapter for satellite wireless test, comprising: a polarized transmission waveguide for transmitting radio frequency wireless signals; the polarization transmission waveguide is provided with a first external interface and a second external interface;

the first external interface is connected with a waveguide type antenna of a satellite; the first external interface is connected with a polarized waveguide interface of the waveguide type antenna, and the sizes of the first external interface and the polarized waveguide interface are matched to be consistent.

Optionally, the polarization transmission waveguide has a polarizer function, and the polarization mode of the polarization transmission waveguide is the same as that of the waveguide type antenna.

Optionally, the converter further comprises a fixing device for fixing the polarization transmission waveguide and the waveguide type antenna.

Optionally, the polarization transmission waveguide is connected to the waveguide antenna polarization waveguide port, so as to shield an antenna radiation structure outside the waveguide antenna polarization waveguide port, thereby reducing electromagnetic leakage of the waveguide antenna adapter.

Optionally, the converter further comprises a waveguide assembly for connecting the polarization transmission waveguide and a surface device; the second external interface is connected with the waveguide assembly.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:

1. the size of the first external interface of the polarization transmission waveguide is matched with the size of the polarization waveguide in the waveguide radiation port of the waveguide antenna, so that the tight connection between the polarization transmission waveguide and the waveguide antenna is ensured, the radio frequency leakage is prevented, the safety of the polarization transmission waveguide is ensured, and the radio frequency signal loss is avoided.

2. The invention can be used for function selection according to specific use requirements, namely, the invention can be used as a device for receiving signals and can also be used as a device for transmitting signals.

3. The fixing point of the fixing device can be designed specifically according to the specific structural characteristics of the satellite antenna, and the fixing device is convenient to operate. Can also be fixed on the surface of the satellite star body.

4. When the waveguide assembly transmits larger radio frequency power signals, the waveguide attenuator can be selectively added in the waveguide assembly, and the applicability is wide.

5. The invention adopts the waveguide antenna adapter for satellite wireless test to be connected with the waveguide type antenna on the satellite for satellite wireless test, and can develop a system wireless test under the condition of not influencing the surrounding environment at all. During the test, field cleaning of field personnel and irrelevant equipment is not needed, a large wave-absorbing wall system is not needed to be erected, the requirement of the satellite system on the environment in a wireless test is greatly reduced, and the difficulty of the wireless test is reduced.

6. The invention also avoids the need of dismounting the on-board antenna when carrying out wired test, and changes the radio frequency interface originally connected with the antenna into the operation of connecting with the wire. The method is beneficial to simplifying operation steps and keeping the state of the test system stable.

Drawings

Fig. 1 is a schematic diagram illustrating a connection between a waveguide antenna adapter for a satellite wireless test and a corresponding waveguide antenna on a satellite according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a waveguide antenna adapter for satellite wireless testing according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1 and fig. 2, the present embodiment discloses a waveguide antenna adapter for satellite wireless test, including: a polarization transmission waveguide 1, a fixing device 2 and a waveguide assembly 3. The polarization transmission waveguide 1 simultaneously has a polarizer function.

Wherein:

the polarization transmission waveguide 1 is a waveguide structure, and in this embodiment, the polarization transmission waveguide 1 includes a main body and an extension arm 101; the extension arm 101 is arranged along the periphery of the main body; an inner cavity 102 is arranged in the main body and used for transmitting radio frequency wireless signals; a first external interface 11 and a second external interface 12 are respectively arranged corresponding to the two ends of the main body;

the first external interface 11 is connected with a waveguide type antenna 4 of the satellite; the size of the first external interface 11 matches the size of the polarized waveguide port of the waveguide-type antenna 4. The waveguide type antenna herein refers to a waveguide type antenna on a satellite, which is an application connection object of the embodiment of the present invention. In the present embodiment, the first external interface 11 is fitted into the polarized waveguide port of the waveguide type antenna 4. The polarized waveguide port is a contracted funnel type. Here, the shape of the polarized waveguide port is merely an example, and is not limited to a specific shape.

The first external interface 11 of the polarization transmission waveguide is connected with the polarization waveguide 41 in the waveguide radiation port of the waveguide type antenna 4, and the sizes of the two are matched and consistent, so that the tight connection of the polarization transmission waveguide and the waveguide type antenna is ensured, and the leakage-free connection function of radio frequency transmission signals is realized; and meanwhile, an antenna radiation structure outside the polarized waveguide port of the waveguide type antenna is shielded, and electromagnetic leakage of the waveguide antenna adapter is reduced.

The polarization mode of the polarization transmission waveguide 1 is the same as that of the waveguide type antenna.

The fixing device is used for connecting and fixing the waveguide antenna adapter and the waveguide type antenna on the satellite. The method specifically comprises the following steps: the fixing device 2 is used for fixing the polarized transmission waveguide 1 and the waveguide type antenna 4. In this embodiment, the fixing device includes at least two

mounting frames

21 and 22, the mounting frames are concave, and two ends of the mounting frames are respectively connected to the extension arm 101 of the polarization transmission waveguide 1 and the waveguide type antenna 4. During specific implementation, the fixing point of the fixing device can be designed specifically according to specific structural characteristics of the satellite antenna, and the satellite antenna is convenient to operate and suitable. Can also be fixed on the surface of the satellite star body.

The waveguide assembly 3 is used for connecting the polarization transmission waveguide and ground equipment; the second external interface 12 is connected to the waveguide assembly 3. It should be noted that the second external interface 2 may also be directly connected to the ground test system with waveguide function, and the waveguide assembly may be omitted.

The waveguide antenna adapter for the satellite wireless test can be connected with a polarized waveguide port of a waveguide type antenna 4 through a polarized transmission waveguide 1. The electromagnetic wave transmitted by the waveguide type antenna 4 on the satellite is conducted to the polarization transmission waveguide 1 in a wired mode before being radiated to the external space, and then is transmitted to a ground test system through the waveguide component 3.

And for the test of the signal sent by the ground test system, the operation is reversed, firstly, the signal sent by the ground test system is received through the coaxial high-frequency port of the waveguide component 3, the signal is converted into a waveguide transmission signal through the waveguide component 3, then the waveguide transmission signal is transmitted to the polarization transmission waveguide 1, and then the signal is transmitted to the polarization waveguide port of the waveguide type antenna on the satellite, so that the wireless channel connection function between the ground and the satellite is completed. After the polarized transmission waveguide 1 is connected with the waveguide type antenna 4 on the satellite in a radio frequency mode, the polarized transmission waveguide needs to be fastened through the fixing device 2, and the connection channel is ensured to be stable and smooth.

In one embodiment, the polarization mode of the waveguide antenna 4 on the satellite is right-hand circular polarization, and the polarization mode of the polarized transmission waveguide 1 also adopts right-hand circular polarization and remains the same as the polarization mode of the waveguide antenna 4.

In one embodiment, when the waveguide assembly is used for transmitting larger radio frequency power signals, a waveguide attenuator can be added in the waveguide assembly to reduce transmission power so as to meet the power use requirement of the coaxial high-frequency cable.

By adopting the embodiment of the invention, the satellite system wireless test can be carried out under the condition of not influencing the surrounding environment at all.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the claims, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention.

Claims

1. A waveguide antenna adapter for satellite wireless test is characterized by comprising: a polarized transmission waveguide for transmitting radio frequency wireless signals; the polarization transmission waveguide is provided with a first external interface and a second external interface;

2. The switch of claim 1, wherein said polarized transmission waveguide is provided with a polarizer function, and the polarized transmission waveguide is polarized in the same manner as the waveguide-type antenna.

3. The transducer of claim 1, further comprising a fixing means for fixing the polarization transmission waveguide and the waveguide-type antenna.

4. The converter of claim 1, wherein said polarization transmission waveguide is connected to said waveguide antenna polarization waveguide port to shield an antenna radiation structure outside said waveguide antenna polarization waveguide port to reduce electromagnetic leakage from said waveguide antenna adapter.

5. The converter of claim 1, further comprising a waveguide assembly for connecting the polar transmission waveguide and a surface device; the second external interface is connected with the waveguide assembly.