CN212648441U - Miniaturized multiplexer - Google Patents
Miniaturized multiplexer Download PDFInfo
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- CN212648441U CN212648441U CN202021654184.0U CN202021654184U CN212648441U CN 212648441 U CN212648441 U CN 212648441U CN 202021654184 U CN202021654184 U CN 202021654184U CN 212648441 U CN212648441 U CN 212648441U
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Abstract
The utility model discloses a miniaturized multiplexer, which comprises a metal shell, a signal input port, a plurality of signal output ports and a plurality of spiral resonators, wherein the signal input port and the plurality of signal output ports are arranged on the metal shell; the spiral resonators are electrically connected with the signal input port, and each spiral resonator is electrically connected with one corresponding signal output port; the signal input port is used for inputting an external signal and transmitting the external signal to each spiral resonator, so that a signal with a corresponding frequency in the external signal is transmitted out through a corresponding signal output port under the resonance action of each spiral resonator; and a metal wall is arranged between the adjacent spiral resonators and is used for isolating signals between the adjacent spiral resonators. The utility model provides a multiplexer has characteristics such as isolation height, small, simple structure.
Description
Technical Field
The utility model relates to a satellite communication field especially relates to a miniaturized multiplexer.
Background
The multiplexer is used for transmitting signals of different frequency bands to different channels respectively, is usually used for separating receiving and transmitting signals of a common antenna, and can be used as an isolating device to be connected with a receiving circuit and a transmitting circuit. Generally, there are two connection methods for a multiplexer at the rf front end: one is single-port input or output signal, and other ports are connected with a receiving and transmitting antenna; the other is that one end is connected with a multiband antenna, and other ports are connected with a multi-signal speaking port. The above connection method can effectively reduce the volume of the rf front end, but the requirement on the performance of the antenna is relatively high, that is, the performance requirement on the multiplexer is relatively high. Therefore, the multiplexer with high performance requirement is now the focus of research.
The main parameter for performance evaluation of multiplexers is isolation. In the prior art, in order to improve the isolation of the multiplexer, the multiplexer is generally implemented by using a T-type feed network, using a resonator, using an open/short transmission line, and the like, but the multiplexer has the problems of complex structure, high circuit design difficulty, large volume, and the like.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a miniaturized multiplexer, which can solve the problems of complex structure, large volume and the like of the multiplexer in the prior art.
The purpose of the utility model is realized by adopting the following technical scheme:
a miniaturized multiplexer comprising a metal case, one signal input port, a plurality of signal output ports mounted on the metal case, and a plurality of spiral resonators mounted within the metal case; the plurality of spiral resonators are electrically connected with the signal input port, and each spiral resonator is electrically connected with one corresponding signal output port; the signal input port is used for inputting an external signal and transmitting the external signal to each spiral resonator, so that a signal with a corresponding frequency in the external signal is transmitted out through a corresponding signal output port under the action of resonance of each spiral resonator; and a metal wall is arranged between the adjacent spiral resonators and is used for isolating signals between the adjacent spiral resonators.
Further, each spiral resonator comprises a first spiral sheet, a second spiral sheet, a first short-circuit branch and a second short-circuit branch; the first spiral sheet is connected with a signal input port through the first short-circuit branch section, and the second spiral sheet is connected with a corresponding signal output port through the second short-circuit branch section; the first short-circuit branch and the second short-circuit branch are grounded through the metal shell; the first spiral piece and the second spiral piece are arranged side by side, and a gap layer is arranged in the middle of the first spiral piece and the second spiral piece.
Further, the first spiral sheet and the second spiral sheet are both metal spiral sheets.
Further, the metal spiral sheet is a circular metal spiral sheet.
Further, the miniaturized multiplexer comprises open-circuit branches; the signal input port is connected with one end of the open-circuit branch, and the other end of the open-circuit branch is suspended.
Further, the miniaturized multiplexer still includes the transmission line, signal input port passes through the transmission line is connected with every first short-circuit branch knot.
Furthermore, all the signal output ports are arranged on the same side wall of the metal shell, and the signal input ports are arranged on other side walls of the metal shell.
Further, one end of the metal wall is grounded through the metal shell, and the other end is short-circuited.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses a set up a plurality of spiral resonators in the metal casing to can make every spiral resonator be carried to the external signal through signal input part input, filter external signal under every spiral resonator's effect, and export the outside through the signal output part that corresponds. The utility model provides a multiplexer has characteristics such as isolation height, simple structure, small.
Drawings
Fig. 1 is a front view of a duplexer provided by the present invention;
fig. 2 is a rear view of the duplexer provided by the present invention;
FIG. 3 is a schematic view of the structure within the metal shell of FIG. 1;
fig. 4 is a schematic structural diagram of the interior of the metal shell of the quadruplex device provided by the present invention;
FIG. 5 is a schematic diagram of an electromagnetic wave simulation of the duplexer in FIG. 1;
fig. 6 is an electromagnetic wave simulation diagram of the quadplexer in fig. 4.
In the figure: 1. a metal shell; 2. a signal input port; 31. a first signal output port; 32. a second signal output port; 33. a third signal output port; 34. a fourth signal output port; 41. a first helical flight; 42. a second flight; 51. a first short circuit branch; 52. a second short circuit branch; 6. an open branch knot; 7. a transmission line; 8. a metal wall.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
The utility model provides a miniaturized multiplexer, including the metal-back, install a signal input port, a plurality of signal output port on the metal-back to and install a plurality of spiral resonator in the metal-back. The metal shell is used for supporting the spiral resonator in the multiplexer, and meanwhile, the spiral resonator is located in the cavity of the closed metal shell, so that energy loss can be reduced.
And the spiral resonator is electrically connected with the signal output port and used for processing the external signal input by the signal input port and outputting a signal with a specific frequency through each signal output port.
Preferably, the signal input port is mounted on the front panel of the metal case and the signal output port is mounted on the rear panel of the metal case, or the signal input port is mounted on the rear panel of the metal case and the signal output port is mounted on the front panel of the metal case. That is, all the signal output ports are mounted on the same panel of the metal case, and the panel on which the signal input ports are mounted is disposed opposite to the panel on which the signal output ports are mounted.
Each spiral resonator, one signal input port and the corresponding one signal output port form a filter for outputting signals of a specific frequency and filtering signals other than the specific frequency. That is, after the external signal is input into the signal input port, the external signal is transmitted to each spiral resonator, and under the resonance effect of each spiral resonator, the signal corresponding to the specific frequency is output to the outside through the corresponding signal output port, and the signals of other frequencies are filtered and not output.
Preferably, the present invention provides for filtering of the signal by two spiral slices in each spiral resonator. Meanwhile, the multiplexer can be realized according to the different number of the spiral resonators arranged in the metal shell, for example, two spiral resonators, namely a second-order duplexer formed by four spiral sheets can generate two transmission zero points in a CQ mechanism, so that an external signal is divided into two output signals. For another example, four spiral resonators, that is, a quadrupler in which eight spiral pieces can form a second order, can generate two transmission zeros in a CQ mechanism, thereby dividing an external signal into four output signals. The CQ mechanism is a CQ structure, namely a topological structure of a microwave filter, and is used for analyzing and generating transmission zero points; the signals can be mutually offset according to the phase difference of different paths, so that a transmission zero point is generated, and the function of the filter is realized.
Preferably, the miniaturized multiplexer includes open stubs. Wherein, the tail end of the open-circuit branch is suspended. That is, one end of the open-circuit branch is electrically connected with the signal input port, and the other end of the open-circuit branch is suspended. Preferably, the miniaturized multiplexer further comprises a transmission line. The signal input port is also connected with each spiral resonator through a transmission line for transmitting an input external signal to each spiral resonator, and the transmission line is electrically connected with the open-circuit branch. By arranging the open-circuit branch nodes on the transmission line, the performance of the multiplexer can be better.
Further, each spiral resonator includes a first spiral piece, a second spiral piece, a first short-circuit stub, and a second short-circuit stub. Wherein the end of the short-circuit branch is grounded. Therefore, one end of the first short circuit branch is electrically connected with the first spiral sheet, and the other end of the first short circuit branch is grounded through the metal shell. One end of the second short circuit branch is electrically connected with the second spiral sheet, and the other end of the second short circuit branch is grounded through the metal shell. The first spiral piece and the second spiral piece are arranged side by side, and a gap layer is arranged between the first spiral piece and the second spiral piece. By arranging the short-circuit branches for each spiral resonator, each resonator can be changed into a short-circuit resonator, and compared with an open-circuit resonator, the length of the short-circuit resonator can be shortened by a half, so that the volume of the resonator is smaller, and the whole multiplexer is more miniaturized. Meanwhile, each short-circuit branch is connected with the metal shell, and the corresponding spiral piece in the spiral resonator can be supported.
Preferably, each first short-circuit branch is further connected with the signal input port through a transmission line, and is used for transmitting an external signal input by the signal input port to the first spiral piece of each spiral resonator, and further, under the action of the first spiral piece and the second spiral piece, each spiral resonator outputs a signal corresponding to a specific frequency to the outside through the corresponding signal output port, and filters out signals of other frequencies.
That is, a filter is formed by a signal output port, a signal input port, and the first spiral sheet, the second spiral sheet, the first short-circuit stub, and the second short-circuit stub, and is used for transmitting signals with specific frequencies.
Preferably, a metal wall is arranged between adjacent spiral resonators, and the metal wall is used for isolating signals of the adjacent spiral resonators, so that the isolation of the multiplexer is improved. Wherein, one end of the metal wall is grounded through the metal shell, and the other end is short-circuited. Because the metal wall has good conductivity, signals of two adjacent spiral resonators can be isolated.
Preferably, the first and second flights are both metal flights. The metal spiral sheet is a circular metal spiral sheet.
Preferably, the frequency of the signal output for each spiral resonator can be varied by varying the width of the circular metal spiral sheet. Therefore, the utility model provides a miniaturized multiplexer, it has advantages such as the frequency band is adjustable, small, simple structure, uses more extensively.
Preferably, the present invention provides a multiplexer that can realize different multiplexers according to the number of signal output ports, for example, when there are two signal output ports, there are two spiral resonators, and this miniaturized multiplexer is also called a duplexer.
For another example, when there are three signal output ports and three spiral resonators, the miniaturized multiplexer is also called a triplexer.
Preferably, when there are two signal output ports and two spiral resonators, the multiplexer is a duplexer, such as the structural schematic of the duplexer shown in fig. 1-3:
the two signal output ports are respectively denoted as a first signal output port 31 and a second signal output port 32, and the first signal output port 31 and the second signal output port 32 are both disposed on the rear panel of the metal shell 1. And the duplexer is used for inputting an external signal through the signal input port 2, then inputting the external signal into the two spiral resonators, filtering the external signal under the action of the two spiral resonators, and then outputting an output signal with a specific frequency through the corresponding signal output port.
Preferably, the two spiral resonators are respectively referred to as a first spiral resonator and a second spiral resonator. The first spiral resonator is used for outputting a signal with a first specific frequency in the external signal input from the signal input port 2 to the outside through the first signal output port 31; similarly, the second spiral resonator is configured to output a signal of a second specific frequency among the external signals input through the signal input port 2 to the outside through the second signal output port 32. Preferably, the first specific frequency and the second specific frequency may be different or the same.
The signal input port 2 is provided on the front panel of the metal case 1.
The first spiral resonator and the second spiral resonator each include a first spiral piece 41, a second spiral piece 42, a first short-circuit branch 51, and a second short-circuit branch 52. The first spiral piece 41 is connected with one end of the first short-circuit branch 51, the other end of the first short-circuit branch 51 is grounded through the metal shell 1, the second spiral piece 42 is connected with one end of the second short-circuit branch 52, and the other end of the second short-circuit branch 52 is grounded through the metal shell 1.
And a metal wall 8 is arranged between the first spiral resonator and the second spiral resonator and is used for isolating signals between the first spiral resonator and the second spiral resonator and avoiding mutual interference.
The duplexer also comprises open stubs 6 and transmission lines 7. One end of the open-circuit branch section 6 is connected with the signal input port, and the other end is suspended. The signal input port 2 is also connected to the first short-circuit branch 51 of the first spiral resonator and the first short-circuit branch 51 of the second spiral resonator through the transmission line 7, and further transmits an input external signal to the first spiral resonator and the second spiral resonator. Meanwhile, the transmission line 7 is also connected with the open-circuit branch section 6.
Preferably, the frequencies of the signals output from the two signal output ports can be adjusted by changing the sizes of the first spiral piece 41 and the second spiral piece 42 in each spiral resonator.
Fig. 5 shows an electromagnetic simulation graph of the frequency response of the duplexer. Where S21 in fig. 5 represents the energy loss degree ratio of the external signal transmitted from the signal input port 2 to the first signal output port 31.
S31 represents the degree of energy loss of the external signal transmitted from the signal input port 2 to the second signal output port 32.
S11 represents a loss ratio of energy of a signal returned to the signal input port 2 after an external signal is transmitted from the signal input port 2 to the first signal output port 31 or the second signal output port 32, to an original signal.
S32 represents the isolation of the first signal output port 31 from the second signal output port 32.
As can be seen from fig. 5, the two spiral resonators have high isolation and low loss of capability.
As shown in fig. 4, when there are four signal output ports and four spiral resonators, the multiplexer is also called a quadplexer, and is configured to output four signals of corresponding specific frequencies through the four signal output ports after an external signal is input through the signal input port 2.
The four signal output ports are respectively denoted as a first signal output port 31, a second signal output port, a third signal output port 33, and a fourth signal output port 34, and the first signal output port 31, the second signal output port, the third signal output port 33, and the fourth signal output port 34 are all disposed on the rear panel of the metal shell 1.
Meanwhile, there are four spiral resonators, which are respectively marked as a first spiral resonator, a second spiral resonator, a third spiral resonator and a fourth spiral resonator. The first spiral resonator is used for outputting a signal with a corresponding frequency in an external signal input from the signal input port 2 to the outside through the first signal output port 31; similarly, the second spiral resonator is configured to output a signal with a corresponding frequency in the external signal input by the signal input port 2 to the outside through the second signal output port; the third spiral resonator is used for outputting a signal with a corresponding frequency in the external signal input from the signal input port 2 to the outside through the third signal output port 33; the fourth spiral resonator is configured to output a signal of a corresponding frequency from the external signal input through the signal input port 2 to the outside through the fourth signal output port 34.
The signal input port 2 is provided on the front panel of the metal case 1.
Similarly, the first spiral resonator, the second spiral resonator, the third spiral resonator, and the fourth spiral resonator each include a first spiral piece 41, a second spiral piece 42, a first short-circuit branch 51, and a second short-circuit branch 52. The first spiral piece 41 is connected with one end of the first short-circuit branch 51, the other end of the first short-circuit branch 51 is grounded through the metal shell 1, the second spiral piece 42 is connected with one end of the second short-circuit branch 52, and the other end of the second short-circuit branch 52 is grounded through the metal shell 1.
Metal walls 8 are arranged between the first spiral resonator and the second spiral resonator, between the second spiral resonator and the third spiral resonator, and between the third spiral resonator and the fourth spiral resonator.
The quadruplex ware still includes open circuit branch 6 and transmission line 7. One end of the open-circuit branch section 6 is connected with the signal input port, and the other end is suspended. The signal input port 2 is also connected to the first short-circuit branch 51 of the first spiral resonator, the first short-circuit branch 51 of the second spiral resonator, the first short-circuit branch 51 of the third spiral resonator, and the first short-circuit branch 51 of the fourth spiral resonator through the transmission line 7, and further transmits an input external signal to the first spiral resonator, the second spiral resonator, the third spiral resonator, and the fourth spiral resonator.
Preferably, the adjustment of the frequencies of the signals output from the four signal output ports can be achieved by changing the sizes of the first spiral piece 41 and the second spiral piece 42 in each spiral resonator.
Fig. 6 shows an electromagnetic simulation graph of the frequency response of the quadplexer. In fig. 6, the dotted lines all represent actual measurement results of the quadplexer, and the solid lines all represent simulation results of the quadplexer. Specifically, S21 in fig. 6 indicates the transmission loss, i.e., the degree of loss of energy, from the signal input port 2 to the first signal output port 31.
S31 represents a transmission loss from the signal input port 2 to the second signal output port.
S41 represents the transmission loss from the signal input port 2 to the third signal output port 33.
S51 represents the transmission loss from the signal input port 2 to the fourth signal output port 34.
S11 represents the ratio of the signal returned to the signal input port 2 to the original external signal after the matching condition of the signal input port 2, i.e. the external signal of the signal input port 2 is transmitted to the first signal output port 31, or the second signal output port, or the third signal output port 33, or the fourth signal output port 34.
As can be seen from fig. 6, the absolute value of S11, i.e. the ratio between the original external signal and the returned signal, is less than-10 dB, so the return loss of the quadplexer is small; meanwhile, as can be seen from the measurement result and the simulation result, the transmission loss of the quadruplex is basically kept unchanged, and the transmission loss of the signal is smaller, which indicates that the performance of the quadruplex is better.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (8)
1. A miniaturized multiplexer comprising a metal housing, a signal input port, a plurality of signal output ports mounted on the metal housing, and a plurality of spiral resonators mounted in the metal housing; the plurality of spiral resonators are electrically connected with the signal input port, and each spiral resonator is electrically connected with one corresponding signal output port; the signal input port is used for inputting an external signal and transmitting the external signal to each spiral resonator, so that a signal with a corresponding frequency in the external signal is transmitted out through a corresponding signal output port under the action of resonance of each spiral resonator; and a metal wall is arranged between the adjacent spiral resonators and is used for isolating signals between the adjacent spiral resonators.
2. The miniaturized multiplexer of claim 1, wherein each of the spiral resonators includes a first spiral piece, a second spiral piece, a first shorting stub and a second shorting stub; the first spiral sheet is connected with a signal input port through the first short-circuit branch section, and the second spiral sheet is connected with a corresponding signal output port through the second short-circuit branch section; the first short-circuit branch and the second short-circuit branch are grounded through the metal shell; the first spiral piece and the second spiral piece are arranged side by side, and a gap layer is arranged in the middle of the first spiral piece and the second spiral piece.
3. The miniaturized multiplexer of claim 2, wherein the first and second spiral pieces are metal spiral pieces.
4. The miniaturized multiplexer of claim 3, wherein the metal spiral is a circular metal spiral.
5. The miniaturized multiplexer of claim 2, wherein the miniaturized multiplexer includes open stubs; the signal input port is connected with one end of the open-circuit branch, and the other end of the open-circuit branch is suspended.
6. The miniaturized multiplexer of claim 2, further comprising a transmission line, wherein the signal input port is connected to each of the first shorting branches via the transmission line.
7. The miniaturized multiplexer of claim 1, wherein all of the signal output ports are disposed on a same side wall of the metal housing, and the signal input ports are disposed on other side walls of the metal housing.
8. The miniaturized multiplexer of claim 1, wherein one end of the metal wall is grounded through the metal shell, and the other end is short-circuited.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112038740A (en) * | 2020-08-10 | 2020-12-04 | 广州智讯通信系统有限公司 | Miniaturized multiplexer |
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| CN112038740A (en) * | 2020-08-10 | 2020-12-04 | 广州智讯通信系统有限公司 | Miniaturized multiplexer |
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