Novel cavity dual-local-oscillator dual-polarization single-output frequency demultiplier

Abstract

The utility model provides a novel cavity dual-local oscillator dual-polarization single-output frequency demultiplier which comprises a frequency demultiplier body. The sealing shell comprises a shell body and a sealing cover installed at an opening in the bottom end of the shell body in a clamped mode, and a double-sealing structure is formed between the sealing cover and the shell body; the frequency demultiplier body is arranged in the sealing shell for sealing protection; the frequency demultiplier body is provided with a wave guide, and the wave guide comprises a circular cavity part and a square cavity part; and a conversion part is arranged between the circular cavity part and the square cavity part. The sealing shell and the frequency demultiplier body are arranged in the sealing shell, so that a sealing protection effect is provided for the frequency demultiplier body; furthermore, a waveguide of the frequency demultiplier body adopts a round-to-square design, so that a novel cavity is formed in the waveguide, and high isolation is formed by reflecting signals through the cavity.

Description

Technical Field

[0001] The utility model relates to the field of frequency downconverters, in particular to a novel cavity dual-local oscillator dual-polarization single-output frequency downconverter. Background Art

[0002] Dual local oscillator dual polarization single output downconverter is a device widely used in the field of television signal processing technology, mainly used for receiving and processing satellite TV signals. Dual local oscillator means that there are two independent local oscillator frequencies inside the downconverter, which are used to process vertically polarized and horizontally polarized satellite signals respectively. Dual polarization supports simultaneous reception and processing of vertically polarized and horizontally polarized satellite signals.

[0003] In the current prior art, such as the existing patent document "CN203166833U dual-polarization dual local oscillator single-output high-gain low-noise downconverter", a dual-polarization dual local oscillator single-output high-gain low-noise downconverter is disclosed, including a waveguide tube at the bottom and a high-frequency head connected to the upper end of the waveguide tube, the high-frequency head is provided with a casing, an integrated circuit board is provided in the casing, a horizontal probe for receiving horizontal polarization signals and a vertical probe for receiving vertical polarization signals are provided in the waveguide tube; a phase modulation line, a pre-signal amplifier, a microstrip controller, a local oscillation mixer, an intermediate frequency amplifier, a frequency limiter and an intermediate frequency mixer are provided on the integrated circuit board; the horizontal probe and the vertical probe are connected to the phase modulation line signal; an output head for outputting the signal is provided at the upper end of the casing. The utility model has high gain and extremely low noise, and eliminates voltage interference when switching horizontal and vertical signals. With a multi-channel power splitter, multiple TVs in multiple companies can share one antenna. In the above-mentioned prior art, the waveguide tube cavity adopts a circular shape, which lacks a high isolation design and cannot form high isolation by reflecting the signal through the cavity. An additional isolation structure needs to be set in the waveguide tube. At the same time, the entire down-converter lacks a sealing protection setting, and the down-converter is directly placed in the outside world. Utility Model Content

[0004] In order to solve the technical problems that high isolation cannot be formed through cavity reflection signals and the sealing protection effect is poor, the utility model provides a novel cavity dual-local oscillator dual-polarization single-output downconverter.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a novel cavity dual-local oscillator dual-polarization single-output downconverter, comprising a downconverter body; further comprising: a sealed shell, the sealed shell comprising a shell and a cover snap-fitted to an opening at the bottom end of the shell, a double sealing structure is formed between the cover and the shell; the downconverter body is arranged in the sealed shell for sealing protection; the downconverter body is provided with a waveguide, the waveguide comprises a circular cavity portion and a square cavity portion; a conversion portion is arranged between the circular cavity portion and the square cavity portion.

[0007] In this technical solution, the sealed housing is used to provide sealed protection for the downconverter body; and the waveguide of the downconverter body adopts a round-to-square design to achieve high isolation.

[0008] Preferably, the double sealing structure comprises a first sealing ring, which is located between the top outer edge of the cover and the bottom outer edge of the shell, and both the top outer edge of the cover and the bottom outer edge of the shell are provided with an annular groove for embedding the first sealing ring.

[0009] In the technical solution, the first seal is formed by the first sealing ring.

[0010] Preferably, a feed horn is provided at one end of the circular cavity portion of the waveguide away from the conversion portion.

[0011] In this technical solution, the feed horn is a component of the waveguide.

[0012] Preferably, the end of the feed horn away from the waveguide is close to the bottom inner wall of the cover.

[0013] Preferably, the double sealing structure also includes an annular boss arranged on the inner wall of the bottom of the cover, the annular boss is embedded in the bottom of the feed horn, and the outer ring wall of the annular boss is matched with the inner wall of the bottom of the feed horn, and a second sealing ring is arranged on the outer ring wall of the annular boss.

[0014] In this technical solution, a second seal is formed by a second sealing ring.

[0015] Preferably, the frequency reducer body is further provided with an output head, the output head penetrates through a side wall of the shell and extends to the outside of the shell, and the output head is fixedly connected to the side wall of the shell.

[0016] In this technical solution, the output head is used to output the signal processed by the downconverter body to the receiving device.

[0017] Preferably, the conversion part includes two groups of first steps and two groups of second steps, and a group of first steps and a group of second steps are arranged on the left and right sides of the conversion part. The first steps and the second steps are connected, and the second steps are connected to the left and right sides of the bottom of the square cavity part. The first step is connected to the top edge of the circular cavity part through the first slope.

[0018] In the technical solution, the first step, the second step and the first slope enable the left and right sides of the bottom of the square cavity portion to smoothly transition and connect with the top edge of the circular cavity portion.

[0019] Preferably, the conversion part also includes two groups of second slopes, which are respectively arranged on the front and rear sides of the conversion part, and the upper ends of the two groups of second slopes are respectively connected to the bottom edges of the front and rear sides of the square cavity part, and the lower ends of the second slopes are connected to the top edge of the circular cavity part.

[0020] In the technical solution, the second slope enables the front and rear side edges of the bottom of the square cavity portion to smoothly transition and connect with the top edge of the circular cavity portion.

[0021] Preferably, a reflective rod is provided at the inner center of the waveguide, and a nickel-plated layer is provided on the surface of the reflective rod.

[0022] Preferably, a horizontal polarization probe and a vertical polarization probe are arranged in the waveguide.

[0023] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0024] The positive and progressive effects of the utility model are:

[0025] The novel cavity dual local oscillator dual polarization single output downconverter proposed above has a sealed housing and a downconverter body placed in the sealed housing, thereby providing a sealed protection for the downconverter body. The opening of the sealed housing for installing the downconverter body is provided with a double sealing structure. When the opening is closed by the cover, a double sealing effect is formed by the double sealing structure, thereby improving the sealing effect of this position and ensuring the overall sealing of the sealed housing. Furthermore, the waveguide of the downconverter body adopts a round-to-square design, so that a new cavity is formed in the waveguide, and high isolation is formed by reflecting the signal through the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall external structure of the utility model.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model as a whole.

[0028] Figure 3 For this utility model Figure 2 Schematic diagram of the structure with the A part in the middle enlarged.

[0029] Figure 4 It is a structural schematic diagram of the back side of the shell of the utility model.

[0030] Figure 5 It is a structural schematic diagram of the back side of the waveguide of the utility model.

[0031] Figure 6 It is a structural schematic diagram of the front side of the waveguide of the utility model.

[0032] Description of Reference Numerals

[0033] 1. Sealed housing; 101. Housing; 102. Cover; 103. Annular boss; 104. First sealing ring; 105. Second sealing ring;

[0034] 2. Downconverter body; 201. Output head; 202. Feed horn; 203. Waveguide; 2031. Circular cavity; 2032. Square cavity; 2033. First step; 2034. Second step; 2035. First slope; 2036. Second slope. DETAILED DESCRIPTION

[0035] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0036] like Figure 1-6 As shown, a novel cavity dual local oscillator dual polarization single output downconverter includes a downconverter body 2; it also includes: a sealed shell 1, the sealed shell 1 includes a shell 101 and a cover 102 that is snap-fitted to the bottom opening of the shell 101, and a double sealing structure is formed between the cover 102 and the shell 101; the downconverter body 2 is arranged in the sealed shell 1 for sealing protection; the downconverter body 2 is provided with a waveguide 203, and the waveguide 203 includes a circular cavity portion 2031 and a square cavity portion 2032; a conversion portion is provided between the circular cavity portion 2031 and the square cavity portion 2032.

[0037] In the specific implementation, the downconverter body 2 is placed in the sealed shell 1 to form a sealed protection, thereby ensuring the sealed protection effect of the downconverter body 2, wherein the sealed shell 1 is made of plastic material as a whole; wherein the waveguide 203 of the downconverter body 2 adopts a design of converting a circular cavity into a square cavity, forming a new cavity structure, and forming high isolation by reflecting the signal through the cavity.

[0038] like Figure 2-3 As shown, as a specific technical solution, the double sealing structure includes a first sealing ring 104, which is located between the top outer edge of the cover 102 and the bottom outer edge of the shell 101, and both the top outer edge of the cover 102 and the bottom outer edge of the shell 101 are provided with an annular groove for embedding the first sealing ring 104.

[0039] The downconverter body 2 is installed into the shell 101, and the connection is achieved by buckling the cover 102 on the opening at the bottom of the shell 101 and engaging the cover 102 with the shell 101. During the above connection process, the first sealing ring 104 is clamped between the top outer edge of the cover 102 and the bottom outer edge of the shell 101 to form a first seal.

[0040] like Figure 2 as well as Figure 5-6As shown, as a specific technical solution, a feed horn 202 is provided at one end of the circular cavity portion 2031 of the waveguide 203 away from the conversion portion.

[0041] The feed horn 202 is used to receive different polarized waves in satellite TV signals.

[0042] like Figure 2 As shown, as a specific technical solution, one end of the feed horn 202 away from the waveguide 203 is close to the bottom inner wall of the cover 102 .

[0043] The feed horn 202 is close to the bottom of the cover 102 to facilitate connection with the annular boss 103 .

[0044] like Figure 2-3 As shown, as a specific technical solution, the double sealing structure also includes an annular boss 103 arranged on the inner wall of the bottom of the cover 102, the annular boss 103 is embedded in the bottom of the feed horn 202, and the outer ring wall of the annular boss 103 is matched with the inner wall of the bottom of the feed horn 202, and a second sealing ring 105 is arranged on the outer ring wall of the annular boss 103.

[0045] When the cover 102 and the shell 101 are engaged and connected, the annular boss 103 is inserted into the bottom of the feed horn 202, and the second sealing ring 105 is clamped between the outer ring wall of the annular boss 103 and the inner wall of the bottom of the feed horn 202 to form a second seal.

[0046] The downconverter body 2 is further provided with an output head 201 , which penetrates through a side wall of the housing 101 and extends to the outside of the housing 101 . The output head 201 is fixedly connected to the side wall of the housing 101 .

[0047] The output head 201 and the housing 101 are integrated, and a sealing material is filled between the two to form a seal.

[0048] like Figure 5-6 As shown, as a specific technical solution, the conversion portion includes two groups of first steps 2033 and two groups of second steps 2034, and a group of first steps 2033 and a group of second steps 2034 are arranged on the left and right sides of the conversion portion, the first steps 2033 and the second steps 2034 are connected, the second steps 2034 are connected to the left and right sides of the bottom of the square cavity part 2032, and the first step 2033 is connected to the top edge of the circular cavity part 2031 through the first slope 2035.

[0049] By providing the first step 2033 , the second step 2034 and the first slope 2035 , the top edge of the circular cavity 2031 and the left and right sides of the bottom of the square cavity 2032 are smoothly butted against each other.

[0050] The conversion portion also includes two groups of second slopes 2036, which are respectively arranged on the front and rear sides of the conversion portion. The upper ends of the two groups of second slopes 2036 are respectively connected to the bottom edges of the front and rear sides of the square cavity portion 2032, and the lower ends of the second slopes 2036 are connected to the top edge of the circular cavity portion 2031.

[0051] By setting the second slope 2036 , the top edge of the circular cavity portion 2031 and the front and rear sides of the bottom of the square cavity portion 2032 are smoothly connected.

[0052] Through the above-mentioned smooth docking, the round cavity is smoothly transitioned to the square cavity.

[0053] A reflective rod is disposed at the center of the waveguide 203 , and a nickel-plated layer is disposed on the surface of the reflective rod.

[0054] A horizontal polarization probe and a vertical polarization probe are arranged in the waveguide 203 .

[0055] Among them, it should be noted that the dual local oscillator dual polarization single output downconverter already has a variety of complete technical means in the prior art, such as the existing patent "CN219611852U a KU band downconverter" or "CN203166833U dual polarization dual local oscillator single output high gain low noise downconverter", which will not be repeated in the present utility model; compared with the prior art, the present utility model improves the cavity of the waveguide 203 of the downconverter body 2, adopts a round-to-square design, and forms a new cavity; at the same time, a sealed shell 1 is provided to improve the sealing protection effect.

[0056] The utility model is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the utility model. The protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the utility model, but these changes and modifications are within the protection scope of the utility model.

Claims

1. A novel cavity dual local oscillator dual polarization single output downconverter, comprising a downconverter body (2); characterized in that: Also includes: A sealed housing (1), the sealed housing (1) comprising a shell (101) and a cover (102) snap-fitted to an opening at the bottom end of the shell (101), a double sealing structure being formed between the cover (102) and the shell (101); the frequency converter body (2) is arranged in the sealed housing (1) for sealing protection; The frequency downconverter body (2) is provided with a waveguide (203), and the waveguide (203) comprises a circular cavity portion (2031) and a square cavity portion (2032); a conversion portion is provided between the circular cavity portion (2031) and the square cavity portion (2032).

2. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 1, characterized in that: The double sealing structure comprises a first sealing ring (104), wherein the first sealing ring (104) is located between the top outer edge of the cover (102) and the bottom outer edge of the shell (101), and both the top outer edge of the cover (102) and the bottom outer edge of the shell (101) are provided with an annular groove for embedding the first sealing ring (104).

3. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 2, characterized in that: A feed horn (202) is provided at one end of the circular cavity portion (2031) of the waveguide (203) away from the conversion portion.

4. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 3, characterized in that: One end of the feed horn (202) away from the waveguide (203) is close to the bottom inner wall of the cover (102).

5. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 3, characterized in that: The double sealing structure also includes an annular boss (103) arranged on the inner wall of the bottom of the cover (102), the annular boss (103) is embedded in the bottom of the feed horn (202), and the outer ring wall of the annular boss (103) is matched with the inner wall of the bottom of the feed horn (202), and a second sealing ring (105) is arranged on the outer ring wall of the annular boss (103).

6. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 1, characterized in that: The frequency reducer body (2) is further provided with an output head (201), the output head (201) penetrates a side wall of the shell (101), and the output head (201) extends to the outside of the shell (101), and the output head (201) is fixedly connected to the side wall of the shell (101).

7. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 1, characterized in that: The conversion portion comprises two groups of first steps (2033) and two groups of second steps (2034); a group of first steps (2033) and a group of second steps (2034) are arranged on the left and right sides of the conversion portion; the first steps (2033) and the second steps (2034) are connected; the second steps (2034) are butt-jointed to the left and right sides of the bottom of the square cavity portion (2032); and the first steps (2033) are butt-jointed to the top edge of the circular cavity portion (2031) via a first slope (2035).

8. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 7, characterized in that: The conversion portion further comprises two groups of second slopes (2036), the two groups of second slopes (2036) being respectively arranged on the front and rear sides of the conversion portion, the upper ends of the two groups of second slopes (2036) being respectively connected to the front and rear bottom edges of the square cavity portion (2032), and the lower ends of the second slopes (2036) being connected to the top edge of the circular cavity portion (2031).

9. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 1, characterized in that: A reflective rod is arranged at the inner center position of the waveguide (203), and a nickel-plated layer is arranged on the surface of the reflective rod.

10. The novel cavity dual local oscillator dual polarization single output downconverter as claimed in claim 1, characterized in that: A horizontal polarization probe and a vertical polarization probe are arranged in the waveguide (203).

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