CN110289468B - Novel duplexer - Google Patents
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- CN110289468B CN110289468B CN201910703708.6A CN201910703708A CN110289468B CN 110289468 B CN110289468 B CN 110289468B CN 201910703708 A CN201910703708 A CN 201910703708A CN 110289468 B CN110289468 B CN 110289468B
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- 230000010287 polarization Effects 0.000 claims description 36
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- 238000002955 isolation Methods 0.000 abstract description 12
- 238000005452 bending Methods 0.000 abstract description 8
- 210000001015 abdomen Anatomy 0.000 abstract description 7
- 238000003780 insertion Methods 0.000 description 6
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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Abstract
The utility model discloses a novel duplexer, which is characterized in that a receiving path filter and a transmitting path filter are arranged in a plane different from a combining port, so that a combining port can perform signal interaction with an antenna at the center of the abdomen of the whole system, and the size of the connection with the antenna is greatly reduced from the connection between the abdomen of the whole system and the antenna; meanwhile, the filter cavity in the filter is subjected to corresponding spatial bending design, so that the isolation degree of the duplexer is increased, and meanwhile, the structure of the duplexer is more compact and miniaturized; thereby reducing the overall size of the satellite ground station and realizing the miniaturization of the satellite ground station.
Description
Technical Field
The utility model relates to a duplex communication technology in the technical fields of satellite communication systems, mobile communication systems and Internet of things, in particular to a novel duplexer.
Background
OMT (Ortho-Mode Transducer orthogonal Mode converter) is also called a double-Mode Transducer or an orthogonal Mode coupler, and is widely applied to satellite communication, military radar and other aspects, and the main function of OMT (Ortho-Mode Transducer orthogonal Mode coupler) is to realize orthogonal polarization duplex transmission (separation and synthesis) in antenna feed. When signals are fed from a common port, the two orthogonal fundamental mode signals can be separated or combined, so that the signals in the same frequency band 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-polarized independent transmission of signals, and is similar to a duplexer. The OMT-based duplexer is a key part in an ODU (Out door Unit signal transceiver outdoor Unit, also called transceiver, which is a key part of a satellite communication terminal) system, and the performance of the duplexer directly affects the whole system. Therefore, it is important to use OMT diplexers with high polarization levels and isolation. However, the polarization capability of a general OMT duplexer is not high, and an OMT duplexer with higher polarization capability is often not compact enough, large in size and inconvenient enough.
As shown in fig. 1, the chinese patent application with application publication number CN203103471U discloses a high bandwidth ku frequency band two-port duplexer with loaded waveguide transition, however, the common port (combining port) of the duplexer, its transmitting port and receiving port are in a planar structure, and in this case, in order not to affect the performance of the duplexer, the receiving and transmitting paths must have a certain length requirement, so the common port can only perform signal interaction with the antenna on the side of the ODU complete machine.
As shown in fig. 2, the chinese patent application with application publication number CN105529518A discloses a ka-band quadrature coupler, in which the combining port is in the middle (the ODU unit can be connected with the antenna from the middle of the side edge), and the transmitting port and the receiving port extend to two sides, but the combining port, the transmitting port and the receiving port are disposed in a plane, which inevitably affects the compactness of the whole unit structure and is not beneficial to the miniaturization of the whole unit. As shown in fig. 3, the diplexer, which is used as a signal interaction channel between the ODU complete machine and the antenna system from the side, has the defects of long connection line and inconvenient connection with the antenna. And ku frequency band is bigger than ka frequency band size, and the frequency interval of receiving and transmitting signals is closer, and the design requirement on the duplexer is higher.
Disclosure of Invention
At least, one of the objects of the present utility model is to provide a novel duplexer in which a combining port, a transmitting port and a receiving port are not located on the same plane, which solves the problems of the prior art, and the structure of the duplexer is miniaturized by spatial bending; and the combining port interacts with the antenna system from the middle of the abdomen of the whole machine, as shown in fig. 4, the connection length of the combining port is only the length in the z-axis direction: a1+c1, greatly shortens the connection length with the antenna system, is convenient for the connection with the antenna system, and makes the whole system more portable.
In order to achieve the above object, the present utility model adopts a technical scheme including the following aspects.
A novel diplexer, comprising:
a transmitting port a, a receiving port b, a combining port c, an OMT, a transmitting path filter a2 and a receiving path filter b2;
the transmitting port a is a transmitting signal input port of the transceiver ODU, the receiving port b is a receiving signal output port of the transceiver ODU, and the combining port c is a common port where the duplexer and the antenna signal interact;
the method comprises the steps that a combining port c is round, a central line of the round combining port c is taken as a z-axis, and a space coordinate system is established; one end of the combining port c extends in the negative direction of the z axis to perform signal interaction with the antenna signal, and the other end of the combining port c is connected with the OMT along the positive direction of the z axis; the combining port c is respectively connected with the transmitting path filter a2 and the receiving path filter b2 through the OMT; the transmit path filter a2 extends in the xy-plane to form a transmit port a, and the receive path filter b2 extends in the xy-plane to form a receive port b.
Preferably, in a novel duplexer, the OMT includes: a circular waveguide-rectangular waveguide transition c1, a first rectangular-rectangular waveguide vertical polarization direction transition a1, and a second rectangular-rectangular waveguide horizontal polarization direction transition b1;
the round waveguide-rectangular waveguide transition c1 adopts a rectangular waveguide rounding design, one end of the round waveguide-rectangular waveguide transition c1 is connected with the combining port c, and the other end of the round waveguide-rectangular waveguide transition c1 is respectively connected with the first rectangular-rectangular waveguide vertical polarization direction transition a1 and the second rectangular-rectangular waveguide horizontal polarization direction transition b1;
the first rectangular-rectangular waveguide vertical polarization direction transition a1 is a multistage step waveguide transition section, and the bottom of the multistage step waveguide transition section is connected with the transmitting path filter a 2; the second rectangular-rectangular waveguide horizontal polarization direction transition b1 is located at one side of the multistage stepped waveguide transition section and is connected with the receiving path filter b 2.
Preferably, in the novel duplexer, one end of the transmitting path filter a2 is connected with the first rectangular-rectangular waveguide in a transition manner in the vertical polarization direction, and is bent and extended in the space of the negative half axis of the x axis to form a transmitting port a positioned on the negative half axis of the x axis;
and one end of the receiving path filter b2 is in horizontal polarization direction transition b1 with the second rectangular-rectangular waveguide, and is bent and extended in the positive half axis space of the x axis to form a receiving port b positioned on the positive half axis of the x axis, so that the transmitting port a and the receiving port b are respectively positioned on two sides of the combining port c of the z axis on the central line.
Preferably, in the novel duplexer, the transmitting path filter a2 includes four waveguide resonant cavities with adjustable sizes and positions, namely a first H-plane waveguide resonant cavity, a second E-plane waveguide resonant cavity, a third E-plane waveguide resonant cavity and a fourth E-plane waveguide resonant cavity;
the first H-plane waveguide resonant cavity and the second E-plane waveguide resonant cavity are of plate-shaped structures, and the third E-plane waveguide resonant cavity and the fourth E-plane waveguide resonant cavity are of L-shaped structures; one end of the first H-plane waveguide resonant cavity is connected with the OMT, and the other end of the first H-plane waveguide resonant cavity is connected with the second E-plane waveguide resonant cavity; one end of the second E-plane waveguide resonant cavity is connected with the first H-plane waveguide resonant cavity, and the other end of the second E-plane waveguide resonant cavity is connected with the third E-plane waveguide resonant cavity with an L-shaped structure; one end of the third E-plane waveguide resonant cavity is connected with the second E-plane waveguide resonant cavity, and the other end of the third E-plane waveguide resonant cavity is connected with the fourth E-plane waveguide resonant cavity; one end of the fourth E-plane waveguide resonant cavity is connected with the third E-plane waveguide resonant cavity, and the other end of the fourth E-plane waveguide resonant cavity is connected with the transmitting port a.
Preferably, in the novel duplexer, the receiving path filter b2 includes a fifth E-plane waveguide resonant cavity, a sixth E-plane waveguide resonant cavity, a seventh E-plane waveguide resonant cavity, an eighth E-plane waveguide resonant cavity, a ninth E-plane waveguide resonant cavity, and a tenth E-plane waveguide resonant cavity, where the size and the position of the waveguide resonant cavities are six adjustable;
the fifth E-plane waveguide resonant cavity, the seventh E-plane waveguide resonant cavity and the eighth E-plane waveguide resonant cavity are all L-shaped structures; the sixth E-plane waveguide resonant cavity, the ninth E-plane waveguide resonant cavity and the tenth E-plane waveguide resonant cavity are all plate-shaped structures; one end of the fifth E-plane waveguide resonant cavity is connected with the OMT, and the other end of the fifth E-plane waveguide resonant cavity is connected with the sixth E-plane waveguide resonant cavity; one end of the sixth E-plane waveguide resonant cavity is connected with one end of the fifth E-plane waveguide resonant cavity, and the other end of the sixth E-plane waveguide resonant cavity is connected with the seventh E-plane waveguide resonant cavity; one end of the seventh E-plane waveguide resonant cavity is connected with the sixth E-plane waveguide resonant cavity, and the other end of the seventh E-plane waveguide resonant cavity is connected with the eighth E-plane waveguide resonant cavity; one end of the eighth E-plane waveguide resonant cavity is connected with the seventh E-plane waveguide resonant cavity, and the other end of the eighth E-plane waveguide resonant cavity is connected with the ninth E-plane waveguide resonant cavity; one end of the ninth E-plane waveguide resonant cavity is connected with one end of the eighth E-plane waveguide resonant cavity, and the other end of the ninth E-plane waveguide resonant cavity is connected with the tenth E-plane waveguide resonant cavity; one end of the tenth E-plane waveguide resonant cavity is connected with one end of the ninth E-plane waveguide resonant cavity, and the other end of the tenth E-plane waveguide resonant cavity is connected with the receiving port b.
In summary, due to the adoption of the technical scheme, the utility model has at least the following beneficial effects:
1. according to the utility model, the receiving path filter and the transmitting path filter are arranged in the plane different from the combining port, so that the combining port can perform signal interaction with the antenna at the center of the abdomen of the whole system, and the size of the connection with the antenna is greatly reduced from the connection between the abdomen of the whole system and the antenna; meanwhile, the filter cavity in the filter is subjected to corresponding spatial bending design, so that the isolation degree of the duplexer is increased, and meanwhile, the structure of the duplexer is more compact and miniaturized; thereby reducing the overall size of the satellite ground station and realizing the miniaturization of the satellite ground station;
2. the novel duplexer adopts the cascade optimization of the circular waveguide-rectangular waveguide transition c1, the first rectangular-rectangular waveguide vertical polarization direction transition a1 and the second rectangular-rectangular waveguide horizontal polarization direction transition b1 in the OMT, so that the polarization isolation of the OMT is increased;
3. the novel duplexer is skillfully designed in the OMT, so that the OMT is miniaturized, and the transition between the OMT and the transmitting filter and the receiving filter is miniaturized; the transition a1 adopts multistage rectangular waveguide cascading (in a step shape), so that the size of the duplexer is greatly reduced, and the bandwidth of the duplexer is increased; the transition c1 adopts a rectangular waveguide rounding design, so that excessive miniaturization of the round waveguide to the rectangular waveguide is realized;
4. the novel duplexer adopts the full E-plane waveguide resonant cavity in the receiving filter, and adopts the mode of converting the H plane into the E plane in the space in the resonant cavity of the transmitting filter, so that the space size is reduced, and the problem of large splitting loss of the full H plane structure during the processing of the duplexer structure is solved.
5. The novel duplexer adopts a unilateral diaphragm coupling mode in the receiving and transmitting filters, so that the processing difficulty and the processing cost of the duplexer are reduced.
Drawings
Fig. 1 is a schematic diagram of a high bandwidth ku band two-port duplexer in the prior art.
Fig. 2 is a schematic diagram of a prior art quadrature coupler.
Fig. 3 is a schematic diagram of signal interaction between a common port of a duplexer and an antenna at the side of an ODU unit in the prior art.
Fig. 4 is a schematic diagram of a connection of a diplexer combining port interacting with an antenna system from the middle of the abdomen of the complete machine according to an exemplary embodiment of the present utility model.
Fig. 5 is a schematic diagram 1 of a novel duplexer structure according to an exemplary embodiment of the present utility model.
Fig. 6 is a simulation result of the novel duplexer of fig. 1, which is an example of the present utility model.
Fig. 7 is a simulation result of the novel duplexer of the present utility model fig. 2.
Fig. 8 is a simulation result of the novel duplexer of the present utility model fig. 3.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, so that the objects, technical solutions and advantages of the present utility model will become more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Fig. 5 and 6 illustrate a novel duplexer according to an exemplary embodiment of the present utility model. The novel duplexer of this embodiment mainly includes:
a transmitting port a, a receiving port b, a combining port c, an OMT, a transmitting path filter a2 and a receiving path filter b2;
the transmitting port a is a transmitting signal input port of the transceiver ODU, the receiving port b is a receiving signal output port of the transceiver ODU, and the combining port c is a common port where the diplexer and the antenna interact with each other.
The method comprises the steps that a combining port c is round, a central line of the round combining port c is taken as a z-axis, and a space coordinate system is established; one end of the combining port c extends in the negative direction of the z axis to perform signal interaction with the antenna signal, and the other end of the combining port c is connected with the OMT along the positive direction of the z axis; the combining port c is respectively connected with the transmitting path filter a2 and the receiving path filter b2 through the OMT; the transmit path filter a2 extends in the xy-plane to form a transmit port a, and the receive path filter b2 extends in the xy-plane to form a receive port b. At this time, the transmitting path filter, the receiving path filter and the combining port on the z axis are not in the same plane, so that a novel spatial duplexer is formed, and the novel spatial duplexer is arranged in a transceiver of the frequency bands such as the ka frequency band and the ku frequency band, so that the whole structure is greatly reduced. Thereby reducing the overall size while improving the signal isolation of the OUD overall and eventually forming the structure of the antenna connection as shown in fig. 4. Extension in the xy plane is herein a broad extension, i.e. the length of extension in the xy plane is much larger than the variation in the z direction, such as exceeding 3: 1.
Specifically, in actual operation, the transceiver ODU transmitting unit transmits the signal input port a, and transmits the signal to the antenna through the OMT and the combining port c, and the antenna transmits the signal to the satellite, and at the same time, the antenna receives the signal sent by the satellite and transmits the signal to the transceiver ODU receiving unit through the combining port c, the OMT and the duplexer output port b.
Further, the OMT includes: a circular waveguide-rectangular waveguide transition c1, a first rectangular-rectangular waveguide vertical polarization direction transition a1, and a second rectangular-rectangular waveguide horizontal polarization direction transition b1; one end of the circular waveguide-rectangular waveguide transition c1 (a rectangular waveguide rounding corner design is adopted to realize excessive miniaturization of the circular waveguide-rectangular waveguide) is connected with the combining port c, and the other end of the circular waveguide-rectangular waveguide transition c1 is respectively connected with the first rectangular-rectangular waveguide vertical polarization direction transition a1 and the second rectangular-rectangular waveguide horizontal polarization direction transition b 1. Wherein a1 adopts multistage rectangular waveguide cascade connection, and b1 is positioned on a side arm part of the OMT. Adjusting the size of a1, the insertion loss, standing wave performance and the isolation height of the transmitting path signal of the OMT can be adjusted; the size and the position of cl are adjusted, the insertion loss and the standing wave performance of a receiving channel signal of the OMT and the isolation of a transmitting channel signal can be adjusted, the size of b1 is adjusted, and the insertion loss and the standing wave performance of the OMT can be adjusted.
Specifically, as shown in fig. 5, the first rectangular-rectangular waveguide vertical polarization direction transition a1 is in a multi-stage step shape after cascade connection of multi-stage rectangular waveguides; the stepped waveguide transition section is adopted, so that the size of the duplexer is greatly reduced, and the bandwidth of the duplexer is increased. In the optimal embodiment of the utility model, the number of waveguide transition steps is set to be 6, so that miniaturization of the whole structure is facilitated under the condition that the polarization isolation capability of the duplexer is optimal. The step bottom of the first rectangular-rectangular waveguide vertical polarization direction transition a1 is connected to the transmit path filter a 2. One end of the transmitting path filter a2 is connected with a first rectangular-rectangular waveguide vertical polarization direction transition a1, and the other end of the transmitting path filter a is bent and extended in the x-axis negative half axis space to form a transmitting port a positioned in the x-axis negative half axis. The second rectangular-rectangular waveguide horizontal polarization direction transition b1 is located at one side of the 5-stage stepped waveguide transition section a1 and is connected to the receiving path filter b 2. One end of the receiving path filter b2 is connected with the horizontal polarization direction transition b1 of the second rectangular-rectangular waveguide, and the other end of the receiving path filter b is bent and extended in the positive half axis space of the x axis to form a receiving port b positioned on the positive half axis of the x axis, so that the transmitting port a and the receiving port b are respectively positioned on two sides of a combining port c with the central line positioned on the z axis, and a spatial structure with the combining port c positioned at the right center is formed as shown in fig. 3.
Further, the transmitting path filter and the receiving path filter comprise a plurality of waveguide resonant cavities, each waveguide resonant cavity comprises an E-plane waveguide resonant cavity and an H-plane waveguide resonant cavity, the E-plane waveguide resonant cavity refers to a waveguide resonant cavity of which the transverse split plane is parallel to the direction of the electric field, and the H-plane waveguide resonant cavity refers to a waveguide resonant cavity of which the transverse split plane is parallel to the direction of the magnetic field. Specifically, the full E-plane waveguide resonant cavity is adopted in the receiving filter, and the space H-plane waveguide resonant cavity is adopted in the transmitting filter to be converted into the E-plane waveguide resonant cavity, so that the space size is reduced, and the problem of large splitting loss of the full H-plane during the processing of the duplexer structure is solved.
Specifically, the transmitting path filter a2 includes a first H-plane waveguide resonator, a second E-plane waveguide resonator (if the E-plane for the first waveguide resonator would result in too long an excessive size for connection between the filter and OMT, and thus the transmitting path filter uses the H-plane waveguide resonator to convert the E-plane waveguide resonator to a waveguide resonator with better performance and smaller structure), and four E-plane waveguide resonators with adjustable sizes and positions. And the individual waveguide cavities are cascaded by a membrane (i.e., the tooth-like gap between waveguide resonators in fig. 5). The center frequency, insertion loss, standing wave performance, bandwidth of the passband of the transmit path signal and out-of-band rejection at the receive path signal can be adjusted by adjusting the size and position of the waveguide resonator and the diaphragm.
The first H-plane waveguide resonant cavity and the second E-plane waveguide resonant cavity are of plate-shaped structures, and the third E-plane waveguide resonant cavity and the fourth E-plane waveguide resonant cavity are of L-shaped structures. The smallest plane of the plate-like structure and the L-shaped structure is defined as an end surface, and the larger plane is a side surface. As can be seen from fig. 3, one end surface of the first H-plane waveguide resonant cavity is connected to the step bottom of the step transition a1 of the OMT, and the other end surface is connected to the side surface of the second E-plane waveguide resonant cavity, so as to implement conversion from the H-plane waveguide to the E-plane waveguide. And one side surface of the second E-plane waveguide resonant cavity is connected with the end surface of the first H-plane waveguide resonant cavity, and one end surface of the second E-plane waveguide resonant cavity is connected with one end surface of the third E-plane waveguide resonant cavity with an L-shaped structure. And one end face of the third E-face waveguide resonant cavity is connected with the second E-face waveguide resonant cavity, and the other end face of the third E-face waveguide resonant cavity is connected with one end face of the fourth E-face waveguide resonant cavity in an L-shaped structure. One end face of the fourth E-face waveguide resonant cavity with an L-shaped structure is connected with one end face of the third E-face waveguide resonant cavity, the other end face of the fourth E-face waveguide resonant cavity is connected with the transmitting port a, and finally a space bending structure shown in fig. 5 is formed, so that a space special-shaped transmitting path filter is formed. Therefore, the spatial bending structure improves the signal isolation degree of the duplexer and reduces the size of the whole duplexer.
Further, the receiving path filter b2 includes six E-plane waveguide resonant cavities with adjustable sizes and positions, including a fifth waveguide resonant cavity, a sixth waveguide resonant cavity, a seventh waveguide resonant cavity, an eighth waveguide resonant cavity, a ninth waveguide resonant cavity, and a tenth waveguide resonant cavity.
Wherein the fifth waveguide resonant cavity, the seventh waveguide resonant cavity and the eighth waveguide resonant cavity are all L-shaped structures; the sixth waveguide resonant cavity, the ninth waveguide resonant cavity and the tenth waveguide resonant cavity are all plate-shaped structures. One end face of the fifth waveguide resonant cavity with the L-shaped structure is connected with the horizontal polarization transition section b1 in the OMT, and the other end face of the fifth waveguide resonant cavity is connected with one end face of the sixth waveguide resonant cavity. One end face of the sixth waveguide resonant cavity is connected with one end face of the fifth waveguide resonant cavity, and the other end face of the sixth waveguide resonant cavity is connected with one end face of the seventh waveguide resonant cavity in an L-shaped structure. One end face of the seventh waveguide resonant cavity with the L-shaped structure is connected with one end face of the sixth waveguide resonant cavity, and the other end face of the seventh waveguide resonant cavity with the L-shaped structure is connected with one end face of the eighth waveguide resonant cavity. One end face of the eighth E-face waveguide resonant cavity with the L-shaped structure is connected with one end face of the seventh E-face waveguide resonant cavity with the L-shaped structure, and the other end face of the eighth E-face waveguide resonant cavity is connected with one end face of the ninth waveguide resonant cavity. One end face of the ninth waveguide resonant cavity is connected with one end face of the eighth waveguide resonant cavity, and the other end face of the ninth waveguide resonant cavity is connected with one end face of the tenth waveguide resonant cavity. And one end face of the tenth waveguide resonant cavity is connected with one end face of the ninth waveguide resonant cavity, and the other end face of the tenth waveguide resonant cavity is connected with the receiving port b. Finally, a space bending structure shown in fig. 5 is formed, and a space special-shaped receiving channel filter is formed. Therefore, the spatial bending structure improves the signal isolation degree of the duplexer and reduces the size of the whole duplexer.
In a further embodiment of the utility model, we have performed simulation tests on the ports of the novel diplexer (the diplexer is arranged in an ODU transceiver in ku frequency band). Fig. 6 shows the simulation results of the S parameters between the b port and the c port in the novel duplexer, and the passband of the b port and the c port is 12.2 GHz-12.8 GHz, and the insertion loss is less than 0.10dB. Fig. 7 shows S-parameter simulation results between the a-port and the c-port in the novel duplexer, and it can be seen from the graph that the pass bands of the a-port and the c-port are 13.8 GHz-14.7 GHz, and the insertion loss is less than 0.1dB. As shown in fig. 8, the in-band isolation between the a-port and the b-port of the novel duplexer of the present utility model is greater than 120dB.
In summary, the present utility model miniaturizes OMT (and miniaturizes OMT with transmitting filter and receiving filter), and sets the receiving channel filter and transmitting channel filter in a plane different from the combining port, so that the combining port can be at the center of abdomen of the whole system (as shown in fig. 4); and then, the filter cavity in the filter is subjected to corresponding spatial bending design, so that the isolation degree of the duplexer is increased, and the structure of the duplexer is more compact and miniaturized.
The foregoing is a detailed description of specific embodiments of the utility model and is not intended to be limiting of the utility model. Various alternatives, modifications and improvements will readily occur to those skilled in the relevant art without departing from the spirit and scope of the utility model.
Claims (3)
1. A novel diplexer, comprising:
a transmitting port, a receiving port, a combining port, an OMT, a transmitting path filter and a receiving path filter;
the transmitting port is a transmitting signal input port of the transceiver ODU, the receiving port is a receiving signal output port of the transceiver ODU, and the combining port is a public port for the interaction of the duplexer and the antenna signal;
the method comprises the steps of establishing a space coordinate system, wherein the combining port is round, and the central line of the round combining port is taken as a z-axis; one end of the combining port extends in the negative direction of the z axis to perform signal interaction with the antenna signal, and the other end of the combining port is connected with the OMT along the positive direction of the z axis; the combining port is respectively connected with the transmitting path filter and the receiving path filter through the OMT; the transmitting path filter extends in the xy plane to form a transmitting port, and the receiving path filter extends in the xy plane to form a receiving port;
the OMT comprises: the method comprises the steps of circular waveguide-rectangular waveguide transition, first rectangular-rectangular waveguide vertical polarization direction transition and second rectangular-rectangular waveguide horizontal polarization direction transition;
the round waveguide-rectangular waveguide transition adopts a rectangular waveguide rounding design, one end of the round waveguide-rectangular waveguide transition is connected with the combining port, and the other end of the round waveguide-rectangular waveguide transition is respectively connected with the first rectangular-rectangular waveguide vertical polarization direction transition and the second rectangular-rectangular waveguide horizontal polarization direction transition;
the first rectangular-rectangular waveguide is transited into a multistage stepped waveguide transition section in the vertical polarization direction, and the bottom of the transition section is connected with the transmitting path filter; the second rectangular-rectangular waveguide horizontal polarization direction transition is positioned at one side of the multistage stepped waveguide transition section and is connected with the receiving path filter; the step number of the transition of the first rectangular-rectangular waveguide in the vertical polarization direction is 6 or 8;
one end of the emission path filter is connected with the first rectangular-rectangular waveguide in a transition manner in the vertical polarization direction, and is bent and extended in the space of the negative half axis of the x axis to form an emission port positioned on the negative half axis of the x axis;
one end of the receiving path filter is in transitional connection with the horizontal polarization direction of the second rectangular-rectangular waveguide, and the receiving path filter is bent and extended in the positive half axis space of the x axis to form a receiving port positioned on the positive half axis of the x axis, so that the transmitting port and the receiving port are respectively positioned on two sides of the combining port of the z axis on the central line.
2. The duplexer of claim 1, wherein the transmit path filter comprises four size and position adjustable waveguide resonators, a first H-plane waveguide resonator, a second E-plane waveguide resonator, a third E-plane waveguide resonator, and a fourth E-plane waveguide resonator;
the first H-plane waveguide resonant cavity and the second E-plane waveguide resonant cavity are of plate-shaped structures, and the third E-plane waveguide resonant cavity and the fourth E-plane waveguide resonant cavity are of L-shaped structures; one end of the first H-plane waveguide resonant cavity is connected with the OMT, and the other end of the first H-plane waveguide resonant cavity is connected with the second E-plane waveguide resonant cavity; one end of the second E-plane waveguide resonant cavity is connected with the first H-plane waveguide resonant cavity, and the other end of the second E-plane waveguide resonant cavity is connected with the third E-plane waveguide resonant cavity with an L-shaped structure; one end of the third E-plane waveguide resonant cavity is connected with the second E-plane waveguide resonant cavity, and the other end of the third E-plane waveguide resonant cavity is connected with the fourth E-plane waveguide resonant cavity; one end of the fourth E-plane waveguide resonant cavity is connected with the third E-plane waveguide resonant cavity, and the other end of the fourth E-plane waveguide resonant cavity is connected with the transmitting port.
3. The duplexer of claim 1, wherein the receive path filter comprises a fifth E-plane waveguide resonator, a sixth E-plane waveguide resonator, a seventh E-plane waveguide resonator, an eighth E-plane waveguide resonator, a ninth E-plane waveguide resonator, a tenth E-plane waveguide resonator, six size-adjustable, position-adjustable waveguide resonators;
the fifth E-plane waveguide resonant cavity, the seventh E-plane waveguide resonant cavity and the eighth E-plane waveguide resonant cavity are all L-shaped structures; the sixth E-plane waveguide resonant cavity, the ninth E-plane waveguide resonant cavity and the tenth E-plane waveguide resonant cavity are all plate-shaped structures; one end of the fifth E-plane waveguide resonant cavity is connected with the OMT, and the other end of the fifth E-plane waveguide resonant cavity is connected with the sixth E-plane waveguide resonant cavity; one end of the sixth E-plane waveguide resonant cavity is connected with one end of the fifth E-plane waveguide resonant cavity, and the other end of the sixth E-plane waveguide resonant cavity is connected with the seventh E-plane waveguide resonant cavity; one end of the seventh E-plane waveguide resonant cavity is connected with the sixth E-plane waveguide resonant cavity, and the other end of the seventh E-plane waveguide resonant cavity is connected with the eighth E-plane waveguide resonant cavity; one end of the eighth E-plane waveguide resonant cavity is connected with the seventh E-plane waveguide resonant cavity, and the other end of the eighth E-plane waveguide resonant cavity is connected with the ninth E-plane waveguide resonant cavity; one end of the ninth E-plane waveguide resonant cavity is connected with one end of the eighth E-plane waveguide resonant cavity, and the other end of the ninth E-plane waveguide resonant cavity is connected with the tenth E-plane waveguide resonant cavity; one end of the tenth E-plane waveguide resonant cavity is connected with one end of the ninth E-plane waveguide resonant cavity, and the other end of the tenth E-plane waveguide resonant cavity is connected with the receiving port.
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