A D-band lens antenna

Abstract

The application belongs to the technical field of millimeter wave antennas, and discloses a D-wave band lens antenna, which comprises a carrier; the carrier is provided with independent receiving channels and radiation channels; the carrier is further provided with a shared channel; the shared channel is separated into a first channel and a second channel by an isolation wall; the first channel is communicated with the receiving channels, and the second channel is communicated with the radiation channels; the isolation wall is located in the shared channel and is in a stepped structure close to the end face of the carrier. The millimeter wave frequency of the application is between 110-170 GHz, and high isolation effect can be provided for the transmission and reception signals on the basis of saving energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of millimeter-wave antenna technology, and particularly relates to a D-band lens antenna. Background Technology

[0002] A lens antenna is an antenna that can convert spherical or cylindrical waves from point or line sources into plane waves to obtain pencil-shaped, fan-shaped, or other shaped beams using electromagnetic waves. It achieves this by appropriately designing the lens surface shape and refractive index to adjust the phase velocity of the electromagnetic waves and obtain a plane wavefront on the radiating aperture.

[0003] In some technical solutions that set the transmit and receive ports on the same port, a coupler is required to achieve transmit-receive isolation in order to form beamforming; however, this will sacrifice a large amount of power consumption. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a D-band lens antenna that operates at millimeter-wave frequencies between 110 and 170 GHz, providing high isolation for transmitting and receiving signals while saving energy.

[0005] The specific technical solution of the present invention is as follows:

[0006] A D-band lens antenna, comprising a carrier;

[0007] The carrier is equipped with independent receiving and radiating channels;

[0008] The carrier is also provided with a common channel, which is divided into a first channel and a second channel by a partition wall;

[0009] The first channel is connected to the receiving channel, and the second channel is connected to the radiating channel;

[0010] The isolation wall is located within the shared passageway, and its end face near the carrier has a stepped structure.

[0011] This application employs a dual-waveguide port in parallel, which eliminates the need for a coupler and reduces losses. With the dual waveguide ports as close as possible to each other, a stepped isolation wall is used to increase isolation. This structure provides ultra-wide bandwidth, high gain, and ensures that the radiated and received beams overlap as much as possible, thereby guaranteeing the consistency of reception and radiation.

[0012] Preferably, the partition wall has a stepped surface that decreases progressively from the port of the shared passage to the interior of the shared passage.

[0013] Preferably, the number of stepped surfaces is 5.

[0014] A D-band lens antenna, comprising a carrier;

[0015] The carrier is equipped with independent receiving and radiating channels;

[0016] The carrier is also provided with a common channel, which is divided into a first channel and a second channel by a partition wall;

[0017] The first channel is connected to the receiving channel, and the second channel is connected to the radiating channel;

[0018] The isolation wall extends from the shared passageway to the outside of the carrier.

[0019] When the isolation wall extends from inside the shared passage to the outside of the carrier, there are no requirements on the specific structure of the isolation wall.

[0020] Preferably, the thickness of the isolation wall is no more than 0.2 mm.

[0021] Preferably, the thickness of the isolation wall is 0.1 mm.

[0022] Preferably, the isolation wall divides the shared passage into a first passage and a second passage.

[0023] Preferably, the receiving channel and the radiating channel are located at one end of the carrier, and the shared channel is located at the other end of the carrier.

[0024] Preferably, it also includes a lens;

[0025] The lens is attached to the side of the carrier near the common channel.

[0026] Compared with existing technologies, this invention solves the problem of ultra-wideband transmission and reception isolation in radar and communication by placing the two waveguide ports of the receiving channel and the radiating channel as close as possible in parallel, thereby completing the transmission and reception through lens radiation. This satisfies both the overlap of the radiator's transmission and reception patterns and the high degree of isolation between transmission and reception. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the isolation wall in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 The front view;

[0030] Figure 4 This is a schematic diagram of an embodiment of the present invention without a partition wall;

[0031] Figure 5 This is a schematic diagram illustrating the installation of the isolation wall in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram illustrating the installation of the isolation wall in other embodiments of the present invention;

[0033] Figure 7 The beam diagrams of the first waveguide port and the second waveguide port in this embodiment of the invention are shown.

[0034] Figure 8 This is a schematic diagram of the isolation between the first waveguide port and the second waveguide port in an embodiment of the present invention.

[0035] In the diagram: 1-Carrier; 2-Receiving channel; 3-Radiation channel; 4-Common channel; 41-First channel; 42-Second channel; 5-Isolation wall; 6-Lens; 7-Step surface. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to specific embodiments.

[0037] like Figures 1-5 As shown, a D-band lens 6 antenna includes a carrier 1; the carrier 1 is provided with an independent receiving channel 2 and a radiating channel 3; the carrier 1 is also provided with a common channel 4, which is divided into a first channel 41 and a second channel 42 by an isolation wall 5; the first channel 41 is connected to the receiving channel 2, and the second channel 42 is connected to the radiating channel 3; the isolation wall 5 is located inside the common channel 4, and its end face near the carrier 1 has a stepped structure.

[0038] Specifically, the receiving channel 2 and the radiation channel 3 are located at one end of the carrier 1, and the common channel 4 is located at the other end of the carrier 1.

[0039] In addition, the D-band lens 6 antenna also includes a lens 6; the lens 6 is connected to the side of the carrier 1 near the common channel 4.

[0040] In this embodiment, the receiving channel 2 and the radiating channel 3 are located at the lower end of the carrier 1, and converge with the common channel 4 as they extend towards the upper end of the carrier 1. Since the common channel 4 is divided into a first channel 41 and a second channel 42 by the isolation wall 5, and the first channel 41 is connected to the receiving channel 2, and the second channel 42 is connected to the radiating channel 3, a first waveguide port is formed at the port of the first channel 41, and a second waveguide port is formed at the port of the second channel 42. At this time, the radiating channel 3, the receiving channel, and the common channel 4 form a deformed Y-shaped structure after being connected.

[0041] Furthermore, the isolation wall 5 divides the shared passage 4 into a first passage 41 and a second passage 42.

[0042] In this embodiment, the isolation wall 5 descends in height from the port of the common passage 4 to the interior of the common passage 4, with five stepped surfaces 7 in total.

[0043] Based on resolving the isolation issue, the first and second ports should be as close as possible. Generally, the thickness of the isolation wall 5 should not exceed 0.2mm. Currently, my country's technical standard is 0.1mm.

[0044] like Figure 7 As shown, it is the beam diagram of the first waveguide port and the second waveguide port.

[0045] The horizontal axis represents the elevation angle, and the vertical axis represents the gain. In the figure, looking from the left, the first line from the top represents the beam at radiation channel 3; the second line from the top represents the beam at receiving channel 2. The figure shows that the maximum gain reaches 29.0430 dB when the center frequency is 140 GHz and the φ is 90°.

[0046] Therefore, this embodiment can achieve basic overlap of the transmitting and receiving beams, ensuring that the two beams have good phase consistency.

[0047] like Figure 8 As shown, it is a schematic diagram of the isolation between the first waveguide port and the second waveguide port.

[0048] The horizontal axis represents frequency, and the vertical axis represents isolation. As can be seen from the graph, the isolation is -45.3029 dB at a frequency of 120 GHz. When the frequency is between 130 GHz and 160 GHz, the isolation remains stable between -26 dB and -28.4100 dB.

[0049] Therefore, based on -25dB as a commonly used indicator, this embodiment can achieve a high isolation effect very well.

[0050] like Figure 6 As shown, in some other embodiments, the difference from this embodiment is that the isolation wall 5 extends from inside the common channel 4 to the outside of the carrier 1.

[0051] At this point, no specific requirements are placed on the structure of the isolation wall 5, yet the above requirements can still be met.

[0052] However, it's important to understand that the isolation wall 5 should be as thin as possible; given the current manufacturing capabilities in my country, the limit is 0.1mm. Furthermore, it's crucial to understand that this makes the isolation wall 5 very susceptible to damage, which is detrimental to the long-term use of the lens 6 antenna.

[0053] Therefore, this embodiment enables the same antenna to transmit and receive signals, achieves ultra-wide bandwidth through the radiation of lens 6, and realizes high isolation through the filtering function of the isolation wall 5, effectively reducing channel loss. This results in a narrow beam with high gain formed by the focusing of lens 6. Furthermore, this embodiment avoids the use of couplers, further reducing losses.

[0054] It should be emphasized that in this embodiment, the lens antenna is applied to a D-band lens antenna, which can achieve high isolation and high gain, and realizes same-end reception of the lens antenna by using different receiving channels and radiation channels in parallel.

[0055] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be considered as limitations on the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A D-band lens antenna, characterized in that, Including carrier; The carrier is equipped with independent receiving and radiating channels; The carrier is also provided with a common channel, which is divided into a first channel and a second channel by a partition wall; The first channel is connected to the receiving channel, and the second channel is connected to the radiating channel; The isolation wall is located within the shared passage, and its end face near the carrier has a stepped structure. The steps of the isolation wall decrease layer by layer from the port of the shared passage to the interior of the shared passage. The thickness of the isolation wall is no more than 0.2 mm; The D-band lens antenna operates at millimeter-wave frequencies between 110 and 170 GHz.

2. A D-band lens antenna as described in claim 1, characterized in that, The number of steps is 5.

3. A D-band lens antenna as described in claim 1 or 2, characterized in that, The thickness of the isolation wall is 0.1 mm.

4. A D-band lens antenna as described in claim 1 or 2, characterized in that, The receiving channel and the radiation channel are located at one end of the carrier, and the shared channel is located at the other end of the carrier.

5. A D-band lens antenna as described in claim 4, characterized in that, It also includes lenses; The lens is attached to the side of the carrier near the common channel.

6. A D-band lens antenna, characterized in that, Including carrier; The carrier is equipped with independent receiving and radiating channels; The carrier is also provided with a common channel, which is divided into a first channel and a second channel by a partition wall; The first channel is connected to the receiving channel, and the second channel is connected to the radiating channel; The isolation wall extends from inside the shared passage to the outside of the carrier; The thickness of the isolation wall is no more than 0.2 mm; The D-band lens antenna operates at millimeter-wave frequencies between 110 and 170 GHz.

7. A D-band lens antenna as described in claim 6, characterized in that, The thickness of the isolation wall is 0.1 mm.

8. A D-band lens antenna as described in claim 6, characterized in that, The receiving channel and the radiation channel are located at one end of the carrier, and the shared channel is located at the other end of the carrier.

9. A D-band lens antenna as described in claim 8, characterized in that, It also includes lenses; The lens is attached to the side of the carrier near the common channel.

Images