CN115101906A - Terahertz duplexer, transceiver and manufacturing method - Google Patents
Terahertz duplexer, transceiver and manufacturing method Download PDFInfo
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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
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/007—Manufacturing frequency-selective devices
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Abstract
The invention belongs to the field of terahertz, and particularly relates to a terahertz duplexer, a transceiver and a manufacturing method. The terahertz duplexer comprises a filter, wherein the filter comprises a first filter and a second filter; also comprises a Y-shaped connecting structure; the Y-shaped connecting structure comprises a branch A, a branch B and a branch C, wherein an included angle between the branch C and the branch A is 135 degrees, an included angle between the branch A and the branch B is 90 degrees, and an included angle between the branch B and the branch C is 135 degrees; one end of the first filter is connected with the branch A, and the other end of the first filter is connected with the waveguide A; one end of the second filter is connected with the branch B, and the other end of the second filter is connected with the waveguide B. In the design and manufacture process, the terahertz wave filter with the designed frequency band can be realized by only adjusting the lengths of the branch B and the branch C.
Description
Technical Field
The invention belongs to the field of terahertz, and particularly relates to a terahertz duplexer, a transceiver and a manufacturing method.
Background
Terahertz wave (THz) frequencies between 0.1THz and 10THz are important components of the electromagnetic spectrum. With the rapid development of modern wireless communications, the spectrum resources available in the future will become more scarce. The terahertz wave band is between millimeter waves and infrared light, abundant spectrum resources are utilized, and development is urgently needed. The existing terahertz wave communication mostly adopts an analog-digital (AD) converter and a digital-analog (DA) converter, and the converters usually only operate at a sampling rate of 10 GS/s, which has become a bottleneck of terahertz communication.
In order to improve the sampling rate and the communication rate of terahertz communication, a terahertz duplexer is developed and consists of two filters and a connecting structure, so that the reasonable utilization of inherent high available bandwidth can be realized, and the sampling rate and the communication rate can be improved by combining the narrow bandwidths of two channels.
Patent KR102202710B1 discloses a duplexer for a bidirectional transceiver in a terahertz frequency band in a communication system and a transceiver having the duplexer; the duplexer comprises a transmitting tunable cylindrical resonant cavity band-pass filter and a receiving tunable cylindrical resonant cavity band-pass filter, each filter comprises a plurality of cylindrical resonators and a waveguide T junction, the second side of each filter is connected to the receiving tunable cylindrical cavity band-pass filter, the upper surfaces of the cylindrical resonators are tuned to respectively adjust the cut-off frequency of the transmitting tunable cylindrical cavity band-pass filter and the cut-off frequency of the receiving tunable cylindrical cavity band-pass filter.
The manufacture of the duplexer generally requires that a filter and a connection structure are manufactured first, the filter is designed according to a terahertz wave frequency band selected as required, and then the filter and the connection structure are combined to obtain the duplexer.
The connection structure in the above patent is T-shaped, and the applicant has found that the terahertz wave in the designed frequency band hardly passes through the filter after combining the T-shaped structure and the filter, and has proposed the present application in order to solve this problem.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a terahertz duplexer, a transceiver, and a manufacturing method.
The terahertz duplexer uses a Y-shaped connecting structure, the Y-shaped connecting structure comprises a branch A, a branch B and a branch C, an included angle between the branch A and the branch B is 135 degrees, an included angle between the branch B and the branch C is 90 degrees, an included angle between the branch C and the branch A is 135 degrees, the Y-shaped connecting structure is connected with a filter to form the duplexer, and the filter can realize terahertz wave passing of a designed frequency band by the filter only by adjusting the lengths of the branch B and the branch C in the design and manufacturing process.
The invention is realized by the following technical scheme:
the invention provides a terahertz duplexer which comprises a filter, a first filter, a second filter and a Y-shaped connecting structure, wherein the filter comprises a first filter and a second filter;
the Y-shaped connecting structure comprises a branch A, a branch B and a branch C, wherein an included angle between the branch C and the branch A is 135 degrees, an included angle between the branch A and the branch B is 90 degrees, and an included angle between the branch B and the branch C is 135 degrees;
one end of the first filter is connected with the branch A, and the other end of the first filter is connected with the waveguide A;
one end of the second filter is connected with the branch B, and the other end of the second filter is connected with the waveguide B.
Further, the first filter is a Chebyshev reactance coupling half-wavelength band-pass filter, and/or the second filter is a Chebyshev reactance coupling half-wavelength band-pass filter.
Furthermore, the first filter comprises a coupling cavity and a resonant cavity which are arranged at intervals, and two end parts of the first filter are both the coupling cavities; and/or the second filter comprises a coupling cavity and a resonant cavity which are arranged at intervals, and both ends of the second filter are the coupling cavities.
Further, the first filter comprises 5 coupling cavities and 4 resonant cavities; and/or the second filter comprises 6 coupling cavities and 5 resonant cavities.
The invention provides a terahertz transceiver in a second aspect, which comprises a transmitting port, a receiving port and the terahertz duplexer, wherein the transmitting port is connected with a first filter, and the receiving port is connected with a second filter.
The third aspect of the invention provides a method for manufacturing a terahertz duplexer, which comprises the following steps:
s100: designing a first filter according to the designed first frequency band, and designing a second filter according to the designed second frequency band;
s200: designing a Y-shaped connecting structure, wherein the Y-shaped connecting structure is provided with a branch A, a branch B and a branch C, the included angle between the branch C and the branch A is 135 degrees, the included angle between the branch A and the branch B is 90 degrees, and the included angle between the branch B and the branch C is 135 degrees;
s300: connecting the branch A with the first filter, and connecting the branch B with the second filter to obtain a theoretical terahertz duplexer;
s400: carrying out simulation optimization experiments on the basis of a theoretical terahertz duplexer;
s500: adjusting the length of the branch A to enable the first filter to realize the selection of the first frequency band; and/or adjusting the length of the branch B to enable the second filter to realize the selection of the second frequency band;
s600: connecting one end of the first filter with the branch A, and connecting the other end of the first filter with the waveguide A; one end of the second filter is connected with the branch B, and the other end of the second filter is connected with the waveguide B; and obtaining the terahertz duplexer.
Furthermore, the first frequency band is 300.1GHz-309.8GHz, and the second frequency band is 322.9GHz-332.1 GHz.
Further, the first filter is a Chebyshev reactance coupling half-wavelength band-pass filter, and/or the second filter is a Chebyshev reactance coupling half-wavelength band-pass filter.
By adopting the technical scheme, the invention has the following advantages:
1. the terahertz duplexer uses a Y-shaped connecting structure, the Y-shaped connecting structure comprises a branch A, a branch B and a branch C, an included angle between the branch A and the branch B is 135 degrees, an included angle between the branch B and the branch C is 90 degrees, an included angle between the branch C and the branch A is 135 degrees, the Y-shaped connecting structure is connected with a filter to form the duplexer, and terahertz waves of a designed frequency band can be transmitted to the filter only by adjusting the lengths of the branch B and the branch C in the design and manufacturing process.
2. The design complexity of the connection structure based on other forms is high, the designed terahertz duplexer is applied to terahertz waves of a frequency band above 300GHz, and the return loss can reach about-9 dB and even higher than-9 dB. The terahertz duplexer can achieve the insertion loss within 2dB and the return loss less than-15 dB.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a first structural schematic diagram of a terahertz duplexer in an embodiment of the present invention;
FIG. 2 is a first schematic diagram of a filter according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a Y-shaped connection structure in an embodiment of the invention;
FIG. 4 is a second schematic structural diagram of a filter according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terahertz duplexer in an embodiment of the present invention;
FIG. 6 is a graph illustrating verification of the performance of filter one in accordance with an embodiment of the present invention;
FIG. 7 is a graph illustrating the performance verification of the second filter according to the embodiment of the present invention;
FIG. 8 is a diagram illustrating the verification of the performance of the terahertz duplexer in the embodiment of the present invention;
fig. 9 is a schematic structural diagram of a terahertz duplexer in an embodiment of the present invention;
in the drawings: 100-filter, 100A-filter I, 100B-filter II, 110-coupling cavity, 120-resonant cavity, 200-Y type connecting structure, 210-branch A, 220-branch B, 230-branch C, 240-intersection, 300-waveguide A, 400-waveguide B, 600-half terahertz duplexer, 700-port I, 800-port II and 900-port III.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, are used merely to facilitate description of the present invention and to simplify description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered limiting of the present invention.
Furthermore, the terms "a" and "an" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "a" or "an" can include one or more of that feature either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
Before obtaining a terahertz duplexer capable of passing terahertz waves of a designed frequency band, it is necessary to perform design and manufacture of the filter 100 and design and manufacture of the connection structure according to the designed frequency band of terahertz waves.
The filter 100 can be designed and manufactured according to different frequency response functions, and the different frequency response function design method includes: chebyshev, generalized chebyshev, butterworth, etc., according to which a filter 100 capable of passing terahertz waves of a designed frequency band is designed, the designed filter 100 including at least the structure, shape, size, etc. of the filter 100.
The design of the connecting structure is that the connecting structure at least has three branches, so that the terahertz duplexer combined with the filter 100 is formed; the designed connection structure at least comprises the structure, the shape, the size and the like.
After the connection structure is connected to the filter 100, because the junction 240 (as shown in fig. 3) in the connection structure causes the in-band property to change, and the terahertz wave in the designed frequency band can hardly pass through the filter 100, a simulation optimization experiment needs to be performed on the connection structure and the filter 100 after connection, and the structure, shape, size, and the like of the connection structure and the filter 100 are optimized, so that the terahertz duplexer formed by the connection structure and the filter 100 after optimization can pass through the terahertz wave in the designed frequency band.
There are many forms of shapes for the connection structure, including the T-shape mentioned in the background, and it is necessary to optimize not only the connection structure but also the filter 100 after connection with the filter 100. The number of optimizations required for this is very large, requiring a lot of time and effort, and is inefficient.
Specifically, the method comprises the following steps: as shown in fig. 4, which shows the dimension a1-a14 that the filter 100 needs to be optimized, it can be seen that the optimization of the filter 100 is not only numerous but also complex.
Based on this, as shown in fig. 1, the invention designs a terahertz duplexer, which includes a filter 100, where the filter 100 includes a first filter 100A and a second filter 100B, and further includes a Y-type connection structure 200;
the Y-shaped connecting structure 200 comprises a branch A210, a branch B220 and a branch C230, wherein the included angle between the branch C230 and the branch A210 is 135 degrees, the included angle between the branch A210 and the branch B220 is 90 degrees, and the included angle between the branch B220 and the branch C230 is 135 degrees;
one end of the first filter 100A is connected with the branch A210, and the other end of the first filter is connected with the waveguide A300;
one end of the second filter 100B is connected with the branch B220, and the other end is connected with the waveguide B400.
Based on this structure, after the Y-type connection structure 200 obtained based on the terahertz wave of the designed frequency band is connected to the filter 100, the terahertz wave of the designed frequency band can be passed through the filter 100 only by optimizing the Y-type connector branch B220 and the branch C230 (i.e., only adjusting the length of the branch B220 and the length of the branch C230), and without optimizing the filter 100.
In some embodiments, further, the first filter 100A is a chebyshev reactance coupling half-wavelength band-pass filter 100 and/or the second filter 100B is a chebyshev reactance coupling half-wavelength band-pass filter 100. The filter 100 obtained by the chebyshev method is more convenient and simpler than other methods in design and manufacture.
In some embodiments, further, the first filter 100A includes a coupling cavity 110 and a resonant cavity 120, which are spaced apart from each other, and both ends of the first filter 100A are the coupling cavities 110; and/or the second filter 100B comprises a coupling cavity 110 and a resonant cavity 120 which are arranged at intervals, and both ends of the second filter 100B are the coupling cavities 110. Specifically, as shown in fig. 2, the coupling cavity 110 and the resonant cavity 120 are disposed at an interval, that is, the first coupling cavity 110 is connected to the first resonant cavity 120, the first resonant cavity 120 is connected to the second coupling cavity 110, the second coupling cavity 110 is connected to the second resonant cavity 120, the second resonant cavity 120 is connected to the third coupling cavity 110, the third coupling cavity 110 is connected to the third resonant cavity 120, the third coupling cavity 110 is connected to the fourth resonant cavity 120, the fourth coupling cavity 110 is connected to the fourth resonant cavity 120, and the fourth coupling cavity 110 is connected to the fifth resonant cavity 120; because the terahertz wave needs to be coupled through the coupling cavity 110 before entering the resonant cavity 120, the two implementation modes can be realized by setting both ends of the filter 100 as the coupling cavity 110, namely (1) the first filter 100A is receiving and the second filter 100B is transmitting; (2) the first filter 100A is transmitting and the second filter 100B is receiving; the application range of the terahertz duplexer is improved, and the terahertz duplexer has better practicability.
In some embodiments, further, the first filter 100A includes 5 coupling cavities 110 and 4 resonant cavities 120, and based on this structure, the first filter 100A can pass terahertz waves in a frequency band of 322.9GHz-332.1 GHz; and/or the second filter 100B comprises 6 coupling cavities 110 and 5 resonant cavities 120, and based on the structure, the second filter 100B can realize the terahertz wave with the frequency band of 300.1GHz-309.8GHz to pass through. It should be noted that when terahertz waves in other frequency bands need to pass through, the number of the coupling cavity 110 and the resonance cavity 120 changes, and all filters in the terahertz frequency band should be included in the protection scope of the present invention.
In some embodiments, further, the branch a210 is integrally formed with the waveguide a 300; and/or the branch B220 is integrally formed with the waveguide B400. The method specifically comprises the following steps: (1) the branch a210 is integrally formed with the waveguide a 300; (2) the branch B220 is integrally formed with the waveguide B400; (3) the branch a210 is integrally formed with the waveguide a300, and the branch B220 is integrally formed with the waveguide B400.
The integrated into one piece can reduce the error that processing caused, improves terahertz transceiver's performance.
In order to obtain the terahertz duplexer, a manufacturing method of the terahertz duplexer is provided, and comprises the following steps:
s100: designing a first filter 100A according to the designed first frequency band, and simultaneously designing a second filter 100B according to the designed second frequency band;
if the first filter 100A is required to pass through the frequency band of 322.9GHz-332.1GHz, the first frequency band is 322.9GHz-332.1 GHz; that is, if the second filter 100B is to pass the terahertz wave with the frequency band of 300.1GHz-309.8GHz, the second frequency band is 300.1GHz-309.8 GHz.
On the basis, the structure, the shape and the size of the first filter 100A and the second filter 100B are calculated and obtained by adopting a Chebyshev design method.
As shown in fig. 6, where (i) is the insertion loss curve of the first filter 100A, and (ii) is the return loss curve of the first filter 100A, it can be seen that the return loss of the first filter 100A is less than-20 dB and the insertion loss is less than 1dB in the frequency band of 322.9GHz-332.1 GHz.
As shown in fig. 7, wherein the third is the insertion loss curve of the second filter 100B, and the fourth is the return loss curve of the second filter 100B, it can be seen that the return loss of the second filter 100B is less than-20 dB and the insertion loss is less than 1dB within 300.1GHz-309.8 GHz.
Therefore, the designed filter 100 has good working performance, signals in the corresponding frequency band can well pass through, and signals in the unnecessary frequency band can be attenuated by the filter.
S200: the Y-shaped connecting structure 200 is designed to enable the Y-shaped connecting structure 200 to be provided with a branch A210, a branch B220 and a branch C230, wherein the included angle between the branch C230 and the branch A210 is 135 degrees, the included angle between the branch A210 and the branch B220 is 90 degrees, and the included angle between the branch B220 and the branch C230 is 135 degrees. It should be noted that the size of Y-shaped connection structure 200 is naturally required to be adapted to filter 100, that is, the size of the end of branch a210 of Y-shaped connection structure 200 is required to be identical to the size of the end of first filter 100A, and the size of the end of branch B220 of Y-shaped connection structure 200 is required to be identical to the size of the end of second filter 100B.
S300: connecting branch a210 with filter one 100A and connecting branch B220 with filter two 100B results in a theoretical terahertz duplexer. The theoretical terahertz duplexer can be a theoretical terahertz duplexer with a real structure, namely the theoretical terahertz duplexer is manufactured; the terahertz duplexer can also be a theoretical terahertz duplexer only with parameters such as structure, shape and size. Of course, the simulation optimization experiment is carried out by using the theoretical terahertz duplexer only having the parameters of the structure, the shape, the size and the like, so that the method is more convenient and saves the cost.
S400: and carrying out simulation optimization experiments on the basis of the theoretical terahertz duplexer. For those skilled in the art, simulation optimization experiments are known, and detailed descriptions of specific working principles are omitted.
S500: adjusting the length of the branch A210 to enable the first filter 100A to select a first frequency band; and/or adjusting the length of the branch B220 to enable the second filter 100B to realize the selection of the second frequency band;
s600: connecting one end of the first filter 100A to a branch A210, and connecting the other end of the first filter to a waveguide A300; one end of the second filter 100B is connected with the branch B220, and the other end of the second filter is connected with the waveguide B400; and obtaining the terahertz duplexer. In a similar way, the obtained terahertz duplexer can be a terahertz duplexer with a real structure, namely the terahertz duplexer is manufactured; the terahertz duplexer only has parameters such as structure, shape and size.
The performance of the terahertz duplexer obtained based on the above method is verified, and the result is shown in fig. 8 and shown in fig. 9, where the curve is the return loss curve of the first terahertz duplexer port 700, the curve is the insertion loss curve of the second terahertz duplexer port 800, and the curve is the insertion loss curve of the third terahertz duplexer port 900, and it can be seen that the return loss of the first terahertz duplexer port 700 is less than-15 dB and the insertion losses of the second terahertz duplexer port 800 and the third terahertz duplexer port 900 are less than 2dB in two frequency bands of 300.1GHz-309.8GHz and 322.9GHz-332.1 GHz. Fig. 8 demonstrates that the signals of the designed frequency band of the terahertz duplexer obtained by the method of the present invention can pass through the filter 100 well, and simultaneously attenuate the signals of other unnecessary frequency bands; the isolation between the second port 800 and the third port 900 is greater than 35dB, which proves that signals of two frequency bands in the first filter 100A and the second filter 100B of the terahertz duplexer do not interfere with each other; the feasibility of the terahertz duplexer is verified.
The terahertz duplexer can be applied to a terahertz transceiver, specifically, the terahertz transceiver comprises a sending port, a receiving port and the terahertz duplexer, the sending port is connected with the first filter 100A, and the receiving port is connected with the second filter 100B.
The terahertz transceiver is manufactured by using metal, so that to obtain the terahertz transceiver with the terahertz duplexer, the terahertz duplexer needs to be obtained by the manufacturing method, and the specific size, dimension and the like of the terahertz duplexer are obtained; according to the size and the dimension, half of the terahertz duplexer 600 is milled on the two metal blocks respectively through a milling machine (as shown in fig. 5), and then the two metal blocks are spliced together to obtain the terahertz transceiver.
It should be noted that other structures for the terahertz transceiver are known to those skilled in the art, and will not be described in detail here.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A terahertz duplexer comprising a filter (100), the filter (100) comprising a first filter (100A) and a second filter (100B), characterized in that: also comprises a Y-shaped connecting structure (200);
the Y-shaped connecting structure (200) comprises a branch A (210), a branch B (220) and a branch C (230), wherein the included angle between the branch C (230) and the branch A (210) is 135 degrees, the included angle between the branch A (210) and the branch B (220) is 90 degrees, and the included angle between the branch B (220) and the branch C (230) is 135 degrees;
one end of the first filter (100A) is connected with the branch A (210), and the other end of the first filter is connected with the waveguide A (300);
one end of the second filter (100B) is connected with the branch B (220), and the other end of the second filter is connected with the waveguide B (400).
2. The terahertz duplexer of claim 1, wherein: the first filter (100A) is a Chebyshev reactance coupling half-wavelength band-pass filter (100), and/or the second filter (100B) is a Chebyshev reactance coupling half-wavelength band-pass filter (100).
3. The terahertz duplexer of claim 1, wherein:
the filter I (100A) comprises a coupling cavity (110) and a resonant cavity (120) which are arranged at intervals, and both end parts of the filter I (100A) are the coupling cavities (110);
and/or the second filter (100B) comprises a coupling cavity (110) and a resonant cavity (120) which are arranged at intervals, and both ends of the second filter (100B) are the coupling cavities (110).
4. The terahertz duplexer of claim 2 or 3, wherein: the first filter (100A) comprises 5 coupling cavities (110) and 4 resonant cavities (120);
and/or said second filter (100B) comprises 6 coupling cavities (110) and 5 resonator cavities (120).
5. A terahertz transceiver, characterized in that: the terahertz duplexer comprises a transmitting port, a receiving port and the terahertz duplexer as claimed in any one of claims 1 to 4, wherein the transmitting port is connected with a first filter (100A), and the receiving port is connected with a second filter (100B).
6. A manufacturing method of a terahertz duplexer is characterized by comprising the following steps:
s100: designing a first filter (100A) according to the designed first frequency band, and designing a second filter (100B) according to the designed second frequency band;
s200: designing a Y-shaped connecting structure (200) to enable the Y-shaped connecting structure (200) to be provided with a branch A (210), a branch B (220) and a branch C (230), wherein the included angle between the branch C (230) and the branch A (210) is 135 degrees, the included angle between the branch A (210) and the branch B (220) is 90 degrees, and the included angle between the branch B (220) and the branch C (230) is 135 degrees;
s300: connecting the branch A (210) with the first filter (100A), and connecting the branch B (220) with the second filter (100B) to obtain a theoretical terahertz duplexer;
s400: carrying out a simulation optimization experiment on the basis of a theoretical terahertz duplexer;
s500: adjusting the length of the branch A (210) to enable the first filter (100A) to realize the selection of the first frequency band; and/or adjusting the length of the branch (B220) to enable the second filter (100B) to realize the selection of the second frequency band;
s600: connecting one end of the first filter (100A) to a branch A (210), and connecting the other end of the first filter to a waveguide A (300); one end of the second filter (100B) is connected with the branch B (220), and the other end of the second filter is connected with the waveguide B (400); and obtaining the terahertz duplexer.
7. The terahertz duplexer manufacturing method as claimed in claim 6, wherein: the first frequency band is 300.1GHz-309.8GHz, and the second frequency band is 322.9GHz-332.1 GHz.
8. The terahertz duplexer manufacturing method as claimed in claim 6, wherein: the first filter (100A) is a Chebyshev reactance coupling half-wavelength band-pass filter (100), and/or the second filter (100B) is a Chebyshev reactance coupling half-wavelength band-pass filter (100).
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