CN210092301U - Ku frequency band OMT duplexer - Google Patents
Ku frequency band OMT duplexer Download PDFInfo
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- CN210092301U CN210092301U CN201920961983.3U CN201920961983U CN210092301U CN 210092301 U CN210092301 U CN 210092301U CN 201920961983 U CN201920961983 U CN 201920961983U CN 210092301 U CN210092301 U CN 210092301U
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Abstract
The utility model particularly relates to a Ku frequency channel OMT duplexer, include: the device comprises a receiving port, a combining port, a transmitting port, a receiving channel metal diaphragm, a first rectangular-rectangular waveguide transition, a circular waveguide-circular waveguide transition, a second rectangular-rectangular waveguide transition, a transmitting channel metal diaphragm and a waveguide filter which is loaded in the receiving channel diaphragm and the transmitting channel diaphragm and has adjustable size and position; the isolation and polarization level of the duplexer are effectively improved by loading the waveguide filter, and after the corresponding bending design and reasonable layout are carried out on the filter cavity in the waveguide filter, the polarization level and isolation of the duplexer can be increased, and the duplexer is more compact in structure and more miniaturized.
Description
Technical Field
The utility model relates to a Ku frequency channel satellite communication system technical field, especially a Ku frequency channel OMT duplexer.
Background
An OMT (Ortho-Mode Transducer) is also called a dual-Mode converter or an orthogonal Mode coupler, and is widely applied to aspects such as satellite communication and military radar, and the like, and the OMT has a main function of realizing orthogonal polarization duplex transmission (separation and synthesis) in antenna feeding, is a key part in an antenna system, and the performance of the OMT directly affects the whole system.
When a signal is fed in from a public port, the signal can be used for separating or combining two orthogonal fundamental mode signals, so that the signals in the same frequency band can work simultaneously in different polarization channels, and the communication capacity is greatly improved; when the OMT duplexer is designed to work in two frequency bands, the OMT duplexer can be used for dual polarization independent transmission of signals and is similar to a duplexer. Therefore, it is important to use OMT duplexers with high polarization level and isolation. However, the common OMT duplexer has low polarization capability, and the OMT duplexer with relatively high polarization capability is often not compact enough, large in size and not convenient enough.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, provide a Ku frequency channel OMT duplexer, through all loading waveguide filter at transmitting path, receiving path, greatly improved OMT duplexer's polarization level and isolation to buckle through the waveguide filter to transmitting path, receiving path loading, reasonable size adjustment makes the duplexer structure miniaturization more.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a Ku band OMT duplexer comprising: the device comprises a transmitting port a, a combining port b, a receiving port c, a transmitting path metal diaphragm a2, a first rectangular-rectangular waveguide transition a1, a circular waveguide-circular waveguide transition b1, a second rectangular-rectangular waveguide transition c1 and a receiving path metal diaphragm c 2;
the transmitting port a is a signal input port of a transmitter Ku frequency band signal, the receiving port c is a signal output port for transmitting a signal to a receiver, and the combining port b is a common port for interaction of a duplexer and an antenna signal; the combining port b is connected to the end c of the receiving port after passing through a receiving access metal diaphragm c2 which is formed by extending a second rectangular-rectangular waveguide transition c1 and a second rectangular-rectangular waveguide transition c1 and is in an L-shaped structure; the combining port b is connected to the transmitting port a through a first rectangular-rectangular waveguide transition a1 and a transmitting path metal diaphragm a2 which is formed by extending the first rectangular-rectangular waveguide transition a1 and is in an inverted U-shaped structure; and the transmitting path metal diaphragm a2 with the inverted U-shaped structure is positioned in the accommodating space formed by the receiving path metal diaphragm c2 with the L-shaped structure.
Preferably, the Ku-band OMT duplexer further includes a waveguide filter loaded in the transmitting path metal diaphragm a2 in the inverted U-shaped structure and the receiving path metal diaphragm c2 in the L-shaped structure, and is used for adjusting the sizes of the receiving path and the transmitting path of the duplexer and adjusting out-of-band rejection of the duplexer.
Preferably, the waveguide filter loaded in the receiving-via metal diaphragm c2 comprises 4-8 waveguide cavities with adjustable size and position, and the waveguide cavities are bent by 90 degrees once to form an L-shaped structure.
Preferably, the waveguide filter loaded in the launch path metal diaphragm a2 is composed of a plurality of waveguide cavities, wherein the plurality of waveguide cavities are tightened into an inverted U-shaped structure after four 90 ° bends.
Preferably, the first rectangular-rectangular waveguide transition a1 and the second rectangular-rectangular waveguide transition c1 are rectangular waveguides with adjustable sizes, and are used for adjusting the matching coupling of the duplexer.
Preferably, the transmitting port a is a non-standard rectangular waveguide of (11 mm-15 mm) × (5mm-7 mm); the receiving port c is a (18mm-22mm) × (5mm-7mm) non-standard rectangular waveguide, and the combining port b is a phi 19.2mm non-standard circular waveguide.
Compared with the prior art, the beneficial effects of the utility model are that:
by adjusting the rectangular-rectangular waveguide transition, the effect of better matching coupling of the duplexer is achieved, the polarization level of the OMT duplexer is improved, and then the duplexer has high signal isolation between a receiving port and a transmitting port by adding carrier wave guide filters in a transmitting path and a receiving path of the duplexer; and in the layout of the waveguide filter, the waveguide filter is designed to be bent, so that the size of the mechanism is effectively reduced, and the duplexer structure is more compact and more miniaturized.
Drawings
Fig. 1 is the utility model discloses an exemplary Ku frequency channel OMT duplexer structure schematic diagram.
Fig. 2 is a simulation result fig. 1 of the Ku-band OMT duplexer according to an exemplary embodiment of the present invention.
Fig. 3 is a simulation result fig. 2 of the Ku-band OMT duplexer according to an exemplary embodiment of the present invention.
Fig. 4 is a simulation result fig. 3 of the Ku-band OMT duplexer according to an exemplary embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Fig. 1 illustrates an exemplary Ku-band OMT duplexer of the present invention, including; the device comprises a transmitting port a, a combining port b, a receiving port c, a transmitting path metal diaphragm a2, a first rectangular-rectangular waveguide transition a1, a circular waveguide-circular waveguide transition b1, a second rectangular-rectangular waveguide transition c1 and a receiving path metal diaphragm c 2.
The receiving port c is a signal output port for transmitting signals to a receiver, and the combining port b is a common port for interaction of a duplexer and an antenna signal; the combining port b is connected to the end c of the receiving port after passing through a receiving access metal diaphragm c2 which is formed by extending a second rectangular-rectangular waveguide transition c1 and a second rectangular-rectangular waveguide transition c1 and is in an L-shaped structure; the combining port b is connected to the transmitting port a through a first rectangular-rectangular waveguide transition a1 and a transmitting path metal diaphragm a2 which is formed by extending the first rectangular-rectangular waveguide transition a1 and is in an inverted U-shaped structure; and the transmitting path metal diaphragm a2 with the inverted U-shaped structure is positioned in the accommodating space formed by the receiving path metal diaphragm c2 with the L-shaped structure.
Wherein the transmitting port a is a non-standard rectangular waveguide of (11 mm-15 mm) × (5mm-7 mm); the receiving port c is a (18mm-22mm) × (5mm-7mm) non-standard rectangular waveguide, and the combining port b is a phi 19.2mm non-standard circular waveguide.
Further, the receiving path metal diaphragm c2 and the transmitting path diaphragm a2 are loaded with a waveguide filter, the waveguide filter comprises a plurality of filter cavities with adjustable sizes and positions, and the sizes, the positions and the structures of the receiving path and the transmitting path are adjusted by adjusting the sizes and the structures of the filter cavities. As shown in fig. 1, when the waveguide filter in the launch path metal diaphragm a2 is tightened together through multiple 90 ° bends to form an inverted U shape, all the launch path diaphragms a1 can be disposed in the accommodating space formed by the L-shaped receiving path metal diaphragm c2, so that the structure of the whole duplexer is more compact.
Specifically, in actual operation, a signal (signal input port) is first transmitted from the signal transmitter to the transmitting port a of the duplexer, and is transmitted to the antenna through the combining port b connected to the transmitting port a, and the antenna transmits the signal to the satellite, and at the same time, the antenna receives the signal transmitted from the satellite and transmits the signal to the receiving port c of the duplexer through the combining port b (signal output port transmits the signal to the signal receiver). The first rectangular-rectangular waveguide transition a1, the second rectangular-rectangular waveguide transition c1 and the circular waveguide-circular waveguide transition b1 are components of an OMT in a Ku frequency band OMT duplexer, wherein c1 and b1 are cascaded to form a straight arm part of the circular waveguide OMT, so that vertical polarization of signals is realized; a1 is the side arm portion of the circular waveguide OMT, which achieves horizontal polarization of the signal. The size of a1 is adjusted, and the insertion loss, standing wave performance and the separation height of signals in a receiving path of the OMT can be adjusted; the size and the position of the cl can be adjusted, the insertion loss and the standing wave performance of a receiving path signal of the OMT and the isolation degree of a signal in a transmitting path can be adjusted, the size of the b1 can be adjusted, and the insertion loss and the standing wave performance of the OMT can be adjusted.
Furthermore, a carrier waveguide filter is added in the transmitting path metal diaphragm c2, the waveguide filter comprises 4-8 waveguide cavities with adjustable size and position, and the waveguide cavities are bent by 90 degrees once to form an L-shaped structure. The size and the position of the waveguide cavity are adjusted, and the center frequency, the insertion loss, the standing wave performance and the out-of-band rejection of the transmission path signal of the receiving path signal passband can be adjusted. And the special-shaped structure of the receiving path diaphragm waveguide filter can be realized by adjusting the relative position (90-degree bending) between the filter cavity and the filter cavity of the waveguide filter, so that the mechanism size is reduced while the mechanism signal isolation degree is improved. In this embodiment, the waveguide filter that is adjusted to receive the loading of the metal diaphragm of the path has 5 rectangular waveguide cavities, where the size of each rectangular waveguide cavity is 14mm × 5mm, and the L-shaped structure is formed by bending the third waveguide cavity of the metal diaphragm waveguide filter by 90 ° at a time.
The transmitting path metal diaphragm a1 simultaneously loads the waveguide filter, which includes a plurality of filter cavities with adjustable size and position, the size and position of the filter cavities are adjusted, and the center frequency of the passband of the transmitting path signal, the insertion loss, the standing wave performance and the out-of-band rejection at the receiving path signal can be adjusted. And the special-shaped structure of the metal diaphragm waveguide filter of the transmitting channel can be realized by adjusting the relative position between each filter cavity and each filter cavity of the waveguide filter in the metal diaphragm, such as bending for 90 degrees for many times, so that the mechanism size is reduced while the mechanism signal isolation degree is improved. In the present embodiment, the filter loaded in the receiving via metal diaphragm has 6 waveguide cavities, and the size of each rectangular waveguide cavity is adjusted to be 19.05mm by 5 mm. After the transition of the first rectangular waveguide and the first rectangular waveguide, the transmitting path metal diaphragm is loaded on the waveguide filter to be bent and placed for 90 degrees for the first time (point A in figure 1); then a second 90 ° bend is made after the third waveguide cavity (point B in fig. 1), e.g.; after the diaphragm between the third waveguide cavity and the fourth waveguide cavity (point C in fig. 1), the waveguide cavity is bent for the third 90 degrees, the last bending is performed on the last waveguide cavity (point D in fig. 1), the inverted U-shaped structure is tightened, the transmitting port a is in the extending direction of the combining port b, the two sides of the inverted U-shaped structure are adjusted to be parallel and smaller than one side of the L-shaped structure, and finally, a compact structure in which the inverted U-shaped structure shown in fig. 1 is completely arranged in the space formed by the L-shaped structure is obtained.
In a further embodiment of the present invention, we have performed simulation tests on each port of the duplexer. Fig. 2 shows the simulation result of the S parameter between the b port and the c port in the exemplary Ku frequency band OMT duplexer of the present invention, and it can be seen from the figure that the pass bands of the a port and the c port are 12.2 to 12.8GHz, and the insertion loss is less than 0.10 dB. Fig. 3 shows the simulation result of the S parameter between the b port and the a port in the Ku frequency band OMT duplexer of the present invention, and it can be seen from the figure that the pass bands of the b port and the a port are 13.9-14.6GHz, and the insertion loss is less than 0.1 dB. As shown in fig. 4: in the Ku frequency band OMT duplexer, the in-band isolation between the port a and the port c is larger than 115 dB. To sum up, the utility model discloses a receive the route at the duplexer, launch the route and pass through loading size, position adjustable waveguide filter to carry out corresponding bending design back to the filter chamber among the waveguide filter, can be when polarization level, the isolation that increases the duplexer, make the duplexer structure compacter, more miniaturized.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A Ku band OMT duplexer comprising: the waveguide coupler comprises a transmitting port (a), a combining port (b), a receiving port (c), a transmitting path metal diaphragm (a2), a first rectangular-rectangular waveguide transition (a1), a circular waveguide-circular waveguide transition (b1), a second rectangular-rectangular waveguide transition (c1) and a receiving path metal diaphragm (c 2); it is characterized in that the preparation method is characterized in that,
the transmitting port (a) is a signal input port of a transmitter Ku frequency band signal, the receiving port (c) is a signal output port for transmitting a signal to a receiver, and the combining port (b) is a common port for interaction of a duplexer and an antenna signal; the combining port (b) is connected to the end of the receiving port (c) after passing through a receiving access metal diaphragm (c2) which is formed by extending a second rectangular-rectangular waveguide transition (c1) and a second rectangular-rectangular waveguide transition (c1) and is in an L-shaped structure; the combining port (b) is connected to the transmitting port (a) through a transmitting access metal diaphragm (a2) which is formed by extending a first rectangular-rectangular waveguide transition (a1) and a first rectangular-rectangular waveguide transition (a1) and is in an inverted U-shaped structure; and the transmitting path metal diaphragm (a2) with the inverted U-shaped structure is positioned in the accommodating space formed by the receiving path metal diaphragm (c2) with the L-shaped structure.
2. The duplexer of claim 1, further comprising a waveguide filter loaded in the transmitting-path metal diaphragm (a2) in the inverted-U structure and the receiving-path metal diaphragm (c2) in the L-shaped structure for adjusting duplexer receiving-path, transmitting-path dimensions and adjusting duplexer out-of-band rejection.
3. The duplexer of claim 2, wherein the waveguide filter loaded in the receive path metal diaphragm (c2) comprises 4-8 adjustable-size, position waveguide cavities bent through 90 ° at a time to form an L-shaped structure.
4. The duplexer of claim 2, characterized in that the waveguide filter loaded in the launch path metal diaphragm (a2) is formed by a plurality of waveguide cavities, wherein the plurality of waveguide cavities are tightened into an inverted U-shaped configuration after four 90 ° bends.
5. The diplexer of claim 1, wherein the first rectangular-rectangular waveguide transition (a1), the second rectangular-rectangular waveguide transition (c1) are rectangular waveguides with adjustable dimensions for adjusting the matching coupling of the diplexer.
6. The duplexer of claim 1, wherein the transmit port (a) is a non-standard rectangular waveguide of (11-15 mm) × (5-7 mm); the receiving port (c) is a non-standard rectangular waveguide with the diameter of (18mm-22mm) × (5mm-7mm), and the combining port (b) is a non-standard circular waveguide with the diameter of phi 19.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920961983.3U CN210092301U (en) | 2019-06-25 | 2019-06-25 | Ku frequency band OMT duplexer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920961983.3U CN210092301U (en) | 2019-06-25 | 2019-06-25 | Ku frequency band OMT duplexer |
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| CN210092301U true CN210092301U (en) | 2020-02-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552155A (en) * | 2022-04-25 | 2022-05-27 | 电子科技大学成都学院 | Dual-mode transmission line |
| CN114725643A (en) * | 2022-06-10 | 2022-07-08 | 四川太赫兹通信有限公司 | Terahertz dual-mode folding multiplexer |
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2019
- 2019-06-25 CN CN201920961983.3U patent/CN210092301U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552155A (en) * | 2022-04-25 | 2022-05-27 | 电子科技大学成都学院 | Dual-mode transmission line |
| CN114725643A (en) * | 2022-06-10 | 2022-07-08 | 四川太赫兹通信有限公司 | Terahertz dual-mode folding multiplexer |
| CN114725643B (en) * | 2022-06-10 | 2022-09-02 | 四川太赫兹通信有限公司 | Terahertz dual-mode folding multiplexer |
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