Broadband power division and 90-degree coupling integrated device for single sideband receiver

Abstract

The utility model relates to a broadband power division and 90-degree coupling integrated device for a single sideband receiver, which comprises a radio frequency incident port, a local oscillator incident port, a first emergent port, a second emergent port, a third emergent port, a fourth emergent port, a load connecting port, a 90-degree coupler and a power divider, the radio frequency incident port and the connection load port, the first emergent port and the second emergent port, and the third emergent port and the fourth emergent port are connected through 90-degree couplers, the local oscillator incident port is connected with the power divider, and connection channels between the three 90-degree couplers and the power divider form an integrated cross structure. Compared with the prior art, the power divider and the 90-degree coupler are integrated and connected to form an integrated cross-shaped structure, so that the input wave loss is reduced, and the transmission bandwidth is not limited any more.

Description

Technical Field

[0001] This utility model relates to the field of microwave coupler technology, and in particular to a broadband power divider and 90-degree coupling integrated device for a single-sideband receiver. Background Technology

[0002] In millimeter-wave and submillimeter-wave communication and detection systems, efficient signal transmission and precise coupling are crucial. A 90-degree coupler is a microwave device that splits an input signal into two output signals with the same amplitude but a 90-degree phase difference. A power divider is a microwave device that evenly distributes signal power and plays a vital role in various systems that require processing and distributing submillimeter-wave signals. Its performance and characteristics significantly impact the overall system performance and functionality. Some sideband-separated RF receiver systems require the coordinated use of multiple 90-degree couplers and multiple power dividers. However, connecting a single 90-degree coupler and a single power divider to the system individually can lead to limitations such as high losses and limited transmission bandwidth. For example, at high frequencies, it may cause mode spurious signals and reduced coupling efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of the prior art by providing a broadband power divider and 90-degree coupler integrated device for a single-sideband receiver. The power divider and the 90-degree coupler are integrated and connected to form an integrated cross-shaped structure, which reduces the input wave loss and removes the limitation on transmission bandwidth.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A broadband power divider and 90-degree coupling integrated device for a single-sideband receiver includes an RF input port, a local oscillator input port, a first output port, a second output port, a third output port, a fourth output port, a load connection port, three 90-degree couplers, and a power divider. The RF input port is connected to the load connection port, the first output port is connected to the second output port, and the third output port is connected to the fourth output port via a 90-degree coupler. The local oscillator input port is connected to the power divider. The two output ports of the 90-degree couplers connected to the RF input port and the load connection port are respectively connected to the input ports of the other two 90-degree couplers. Similarly, the two output ports of the power divider are respectively connected to the input ports of the other two 90-degree couplers. The connection channels between the three 90-degree couplers and the power divider form an integrated cross-shaped structure.

[0006] Furthermore, the 90-degree coupler includes a first input port, a second input port, a coupling channel, a first output port, and a second output port. The first input port and the second input port are connected through the coupling channel, and the first output port and the second output port are also connected through the coupling channel.

[0007] Furthermore, the coupling channel comprises five channels of equal width, each channel having a length equal to one-quarter of the wavelength of the wave input at the input port.

[0008] Furthermore, the first input port and the second input port have the same width and height.

[0009] Furthermore, the first output port and the second output port have the same width and height.

[0010] Furthermore, the width and height of the first input port, the second input port, the first output port, and the second output port are determined by the wavelength of the wave input at the first input port and the second input port.

[0011] Furthermore, the power divider includes two output ports and one input port, the output ports and the input port forming a Y-shaped structure, and the input port is connected to the local oscillator incident port.

[0012] Furthermore, the two output ports have the same width and height.

[0013] Furthermore, the radio frequency incident port is connected to the radio frequency feed of the single-sideband receiver.

[0014] Furthermore, the local oscillator incident port is connected to the local oscillator signal source of the single-sideband receiver.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model integrates a power divider and a 90-degree coupler to form an integrated cross-shaped structure, which reduces input wave loss, removes bandwidth limitations, avoids mode spurious and coupling efficiency reduction that may occur in the high-frequency band, and improves signal transmission efficiency and quality.

[0017] 2. This utility model achieves power equalization of the input RF signal by designing a 90-degree coupler with the same structural dimensions at the port. It also designs a coupling channel with a channel length equal to one-quarter of the input wave wavelength at the input port, resulting in a 90-degree phase difference in the power-equalized signal. This design can be applied to millimeter-wave and submillimeter-wave frequency bands and has broad application prospects and flexibility.

[0018] 3. This utility model designs a power divider with a Y-shaped structure and equal port length and width to evenly divide the input local oscillator wave, which helps the single-sideband receiver achieve accurate sideband separation and signal synthesis in subsequent signal processing;

[0019] 4. The structure of this utility model is simple and easy to process, which reduces production costs and improves the reliability and stability of the system. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the present utility model;

[0021] Figure 2 This is a top view of the 90-degree coupler structure of this utility model;

[0022] Figure 3 This is a side view of the 90-degree coupler structure of this utility model;

[0023] Figure 4 This is a system signal strength diagram of radio frequency wave incident at the radio frequency incident port according to an embodiment of the present invention;

[0024] Figure 5 This is a phase difference diagram of a system signal in which radio frequency waves are incident at the radio frequency incident port according to an embodiment of the present invention;

[0025] Figure 6 This is a system signal intensity diagram of a local oscillator wave incident at the local oscillator incident port according to an embodiment of the present invention;

[0026] Figure 7 This is a phase difference diagram of the system signal when the local oscillator wave is incident at the local oscillator incident port, according to an embodiment of the present invention. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0028] Example

[0029] This embodiment aims to disclose a broadband power divider and 90-degree coupling integrated device for a single-sideband receiver. This device, as shown... Figure 1As shown, the device includes an RF input port 1, a local oscillator input port 2, a first output port 3, a second output port 4, a third output port 5, a fourth output port 6, a load connection port 7, three 90-degree couplers 8, and a power divider 9. The housing of this device is made of low-loss metal materials, such as aluminum or copper. The waveguide dimensions of each port are selected from international standard waveguides such as WM-710 (WR-2.8) or non-standard waveguides with other structural dimensions that meet the requirements of waveguide transmission.

[0030] In this device, the RF input port 1 is connected to the load port 7, the first output port 3 is connected to the second output port 4, and the third output port 5 is connected to the fourth output port 6, each connected via a 90-degree coupler 8. The RF input port 1 is connected to the RF feed of the single-sideband receiver, and the local oscillator input port 2 is connected to the local oscillator signal source of the single-sideband receiver. These two ports receive the input RF wave and the local oscillator wave. In this embodiment, it is assumed that the input waves are both TE10 waves.

[0031] The local oscillator incident port 2 is connected to the input port of the power divider 9. The power divider 9 includes two output ports and one input port. The output ports and the input port form a Y-shaped structure. The two output ports have the same width and height, so that the local oscillator wave after passing through the power divider 9 will be divided into two waves with a signal strength ratio of 1:1 and the same phase.

[0032] The output ports of the 90-degree coupler 8, which is connected to the RF input port 1 and the load port 7, are respectively connected to the input ports of the other two 90-degree couplers 8. Similarly, the two output ports of the power divider 9 are respectively connected to the input ports of the two 90-degree couplers 8. The connection channels between the three 90-degree couplers 8 and the power divider 9 form an integrated cross-shaped structure, which can effectively transmit and process signals in a wide frequency range while reducing signal loss during transmission.

[0033] 90-degree coupler 8 Figure 2 and Figure 3 As shown, it includes a first input port 81, a second input port 82, a coupling channel 83, a first output port 84, and a second output port 85. The coupling channel 83 includes five channels of equal width, which allows the two input waves to be fully coupled and the energy to be evenly distributed. The length of each channel is one-quarter of the wavelength of the wave input at the input port, so that the signals of the waves output from the two output ports have a 90-degree phase difference.

[0034] In this embodiment, to ensure that only the TE10 wave can pass through the input wave, the width of the input and output ports of the three 90-degree couplers 8 and the power divider 9 is 0.355 mm, and the height is 0.71 mm. In another embodiment, the center frequency of the three 90-degree couplers 8 and the power divider 9 is 345 GHz, applied to the 300-400 GHz band, with an operating bandwidth of 100 GHz and a wavelength range of 1-0.75 mm.

[0035] Next, let's take a real-world application scenario as an example:

[0036] Radio frequency waves are incident at radio frequency incident port 1, and the coupling strength of the six ports is as follows: Figure 4 As shown, the return loss S11 of the signal at RF input port 1 and the signal S21 at local oscillator input port 2 are both less than -15dB. The received signals S31 at the first output port 3 and S41 at the second output port 4 are both around -6dB. Figure 5 As shown, the phase difference between the two ports is 90 degrees; the received signals S51 at the third output port 5 and S61 at the fourth output port 6 are both around -3dB, and as... Figure 5 As shown, the phase difference between the two ports is 90 degrees.

[0037] The local oscillator wave is incident at port 2, and the coupling strength of the six ports is as follows: Figure 6 As shown, the return loss S22 of the signal at the local oscillator incident port 2 and the signal S12 at the RF incident port 1 are both less than -15dB. The received signals S31 at the first output port 3 and S41 at the second output port 4 are both around -6dB, and as... Figure 7 As shown, the phase difference between the two ports is 90 degrees; the received signals S51 at the third output port 5 and S61 at the fourth output port 6 are both around -3dB, and as... Figure 7 As shown, the phase difference between the two ports is 90 degrees.

[0038] In summary, this device can integrate the power distribution of the local oscillator signal and the radio frequency signal, and generate four beams of light with a phase difference of 90 degrees. This is crucial for single-sideband receivers and helps to achieve accurate sideband separation and signal synthesis in subsequent signal processing.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A broadband power divider and 90-degree coupling integrated device for a single-sideband receiver, characterized in that, The device includes a radio frequency input port (1), a local oscillator input port (2), a first output port (3), a second output port (4), a third output port (5), a fourth output port (6), a load connection port (7), three 90-degree couplers (8), and a power divider (9). The radio frequency input port (1) is connected to the load connection port (7), the first output port (3) is connected to the second output port (4), and the third output port (5) is connected to the fourth output port (6) via a... A 90-degree coupler (8) is connected, the local oscillator incident port (2) is connected to the power divider (9), the two output ports of the 90-degree coupler (8) connected to the RF incident port (1) and the load connection port (7) are respectively connected to the input ports of the other two 90-degree couplers (8), and the two output ports of the power divider (9) are also respectively connected to the input ports of the two 90-degree couplers (8). The connection channel between the three 90-degree couplers (8) and the power divider (9) forms an integrated cross-shaped structure.

2. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 1, characterized in that, The 90-degree coupler (8) includes a first input port (81), a second input port (82), a coupling channel (83), a first output port (84), and a second output port (85). The first input port (81) and the second input port (82) are connected through the coupling channel (83), and the first output port (84) and the second output port (85) are also connected through the coupling channel (83).

3. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 2, characterized in that, The coupling channel (83) includes five channels of equal width, each channel having a length equal to one-quarter of the wavelength of the wave input at the input port.

4. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 2, characterized in that, The first input port (81) and the second input port (82) have the same width and height.

5. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 2, characterized in that, The first output port (84) and the second output port (85) have the same width and height.

6. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 2, characterized in that, The width and height of the first input port (81), the second input port (82), the first output port (84), and the second output port (85) are determined by the wavelength of the wave input at the first input port (81) and the second input port (82).

7. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 1, characterized in that, The power divider (9) includes two output ports and one input port. The output ports and the input port form a Y-shaped structure. The input port is connected to the local oscillator incident port (2).

8. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 7, characterized in that, The two output ports have the same width and height.

9. The broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 1, characterized in that, The radio frequency incident port (1) is connected to the radio frequency feed of the single sideband receiver.

10. A broadband power divider and 90-degree coupling integrated device for a single-sideband receiver according to claim 1, characterized in that, The local oscillator incident port (2) is connected to the local oscillator signal source of the single-sideband receiver.

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