CN208352501U - A kind of highly selective miniaturized duplexer - Google Patents
A kind of highly selective miniaturized duplexer Download PDFInfo
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- CN208352501U CN208352501U CN201820741546.6U CN201820741546U CN208352501U CN 208352501 U CN208352501 U CN 208352501U CN 201820741546 U CN201820741546 U CN 201820741546U CN 208352501 U CN208352501 U CN 208352501U
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- pass filter
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- highly selective
- magnetic coupling
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Abstract
The utility model discloses a kind of highly selective miniaturized duplexers, including high-pass filter, low-pass filter, high-frequency emission port, low frequency reception port and public port etc., filter uses the structure of pectination chamber, there is a common cavity between high-pass filter and low-pass filter, electric coupling structure and magnetic coupling arrangement are equipped in high-pass filter access, magnetic coupling arrangement is equipped in low-pass filter access, duplexer further includes tuning screw, is connected between adjacent resonators by even muscle, increases magnetic coupling amount.The utility model increases electric coupling structure on the basis of magnetic coupling arrangement, so that high-pass filter response realizes multiple transmission zeros in low side, and then increases selectivity, these transmission zeros can reduce interfering with each other between two filters.
Description
Technical field
The utility model relates to mobile communication fields.
Background technique
Duplexer is the key fitment in communication system, and effect is will to emit and receive signal to be isolated, and guarantees to receive
It can be worked normally simultaneously with transmitting.It is made of the filter of two groups of different frequencies, and the machine transmitting signal is avoided to be transferred to
Receiver.Currently, communication system is generally all to miniaturization, the duplexer of miniaturization is always research hotspot.Meanwhile frequency spectrum
Resource is increasingly crowded, and just to the selectivity of filter or duplexer, more stringent requirements are proposed for this.The utility model is exactly a
Highly selective miniaturized duplexer based on requirements above.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, it is simple to provide a kind of structure, and length is shorter, weight
Relatively light and high yield rate highly selective miniaturized duplexer.
The purpose of this utility model is achieved through the following technical solutions:
A kind of highly selective miniaturized duplexer, including shell, the enclosure interior are provided with high-pass filter, low pass filtered
Wave device and common cavity, high-pass filter are connected with low-pass filter by resonator where common cavity；The high-pass filter and
Low-pass filter includes multiple resonators, and coupled structure is constituted between adjacent resonators；The resonator includes tuning plug
With coaxial borehole, the lower end of tuning plug is fixed on the bottom of shell, and the upper end of tuning plug connects the coaxial borehole；The shell
On be provided with low frequency reception port, public port and high-frequency emission port, wherein resonator and high on the right side of the high-pass filter
Frequency emission port is connected, and resonator is coupled with resonator where common cavity on the left of high-pass filter, and the low-pass filter is left
Side resonator is connected with low frequency reception port, and resonator is coupled with resonator where common cavity on the right side of low-pass filter；It is described
Coupled structure in high-pass filter includes electric coupling structure and magnetic coupling arrangement；The resonator is all stepped impedance structure.
It include two electric coupling structures in the high-pass filter access, remaining is magnetic coupling arrangement.
The all magnetic coupling arrangements of the coupled structure of the low-pass filter.
In the shell, it is connected between resonator by even muscle, to increase magnetic coupling amount.
The structure of the duplexer is pectination cavity configuration.
Tuning screw, the opening direction of the tuning screw and coaxial borehole on each resonator are installed on the shell
It is corresponded.
The beneficial effects of the utility model are:
1. comparing traditional coaxial duplexer, the miniaturized duplexer is due to using pectination cavity configuration, so duplexer
Volume and weight is much smaller, reduces the insertion loss of duplexer, can easily be built in antenna.
2. using the cross coupling structure being made of electric coupling structure and magnetic coupling arrangement, so that low pass filter response exists
High-end to have multiple transmission zeros, high-pass filter response has multiple transmission zeros in low side, substantially increases the selection of duplexer
Property and isolation.
3. this duplexer uses stepped impedance structure (SIR structure), filter volume can be reduced significantly to improve base station
The integrated level of system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In Fig. 1,1- low frequency reception port, 2- common cavity, 3- tuning screw, 4- public port, 5- electric coupling structure, 6- high
Frequency emission port, 7- connect muscle, 8- shell.
Specific embodiment
The technical solution of the utility model, but the protection scope of the utility model are described in further detail with reference to the accompanying drawing
It is not limited to as described below.
As shown in Figure 1, highly selective miniaturized duplexer, by low frequency reception port 1, common cavity 2, tuning screw 3 is public
Port 4, electric coupling structure 5, high-frequency emission port 6, even muscle 7, shell 8 form.
Highly selective each component connection relationship of miniaturized duplexer is as follows:
Duplexer includes high-pass filter and low-pass filter composition, and high-pass filter and low-pass filter pass through common cavity
2 are connected, and with common cavity center line, low-pass filter is located at the left side of common cavity 2, and high-pass filter is located at the right side of common cavity 2；
Filter is made of multiple resonators, and one end of resonator is fixed on the shell 8 of duplexer, and adjacent resonator passes through even muscle
7 connections, resonator elements include tuning plug and coaxial borehole, and tuning screw 3 is provided on the opening direction of coaxial borehole, are tuned
One end of screw 3 is fixed on shell 8；There are three interface on shell 8, high-frequency emission port 6 be located in high-pass filter most
The resonator on right side connects, low frequency reception port 1 be located at the low-pass filter leftmost side resonator connect, public port 4 with
Resonator in common cavity connects.
Highly selective miniaturized duplexer working principle is as follows:
High-pass filter and low-pass filter share common antenna in duplexer, and there are two types of the operating modes of duplexer,
In one is transmitting signal, another kind is to receive signal, both operating modes work at the same time, do not interfere with each other.When work, duplex
Device starts to receive the signal from antenna, receives signal by public port and enters duplexer, in the side of low-pass filter, respectively
Coupled structure in a resonator is all magnetic coupling arrangement, and adjacent resonator is connected by even muscle 7, can increase magnetic coupling
Amount receives signal and passes through a series of coupling and transmitting, is finally transferred to the low frequency reception port 1 of low-pass filter.
At the same time, it is connected with high-pass filter in the right end of common cavity 2, connected at the resonator of high-pass filter right end
It is connected to high-frequency emission port 6, emits signal by high-frequency emission port and enters high-pass filter.Setting two in high-pass filter
Resonator with electric coupling structure 5, remaining resonator are magnetic coupling arrangement, thus constitute cross-linked structure,
Such cross coupling structure can make low pass filter response have multiple transmission zeros high-end, so receiving signal and transmitting
Signal is not interfere with each other.Emit signal and pass through electric coupling structure 5 and a series of magnetic-coupled coupling process, filters out low frequency letter
Number, common cavity 2 is transferred to by high-pass filter, so that transmitting signal is transferred to public port.
This cross coupling structure increases the selectivity and good signal isolation performance of duplexer, and duplexer is made to exist
While receiving signal, signal can also be sent, and this duplexer has good isolation and signal screening, low pass
In tranmitting frequency, high-pass filter resonance can make to receive signal and emit signal not do mutually filter resonance in receiving frequency
It disturbs, improves anti-interference ability significantly.Each resonator in this duplexer uses stepped impedance structure (SIR structure), energy
Reduction filter volume is to improve the integrated level of base station system significantly.Meanwhile duplexer uses pectination cavity configuration, realizes
More transmission zeros substantially increase the selectivity of duplexer and reduce the insertion loss of duplexer.
Claims (6)
1. a kind of highly selective miniaturized duplexer, it is characterised in that: including shell (8), the shell (8) is internally provided with height
Bandpass filter, low-pass filter and common cavity (2), high-pass filter and low-pass filter pass through resonator where common cavity (2)
It is connected；The high-pass filter and low-pass filter include multiple resonators, and coupled structure is constituted between adjacent resonators；
The resonator includes tuning plug and coaxial borehole, and the lower end of tuning plug is fixed on the bottom of shell (8), and the upper end of tuning plug connects
Connect the coaxial borehole；Low frequency reception port (1), public port (4) and high-frequency emission port are provided on the shell (8)
(6), wherein the high-pass filter on the right side of resonator be connected with high-frequency emission port (6), high-pass filter left side resonator and
Resonator where common cavity (2) is coupled, and resonator is connected with low frequency reception port (1) on the left of the low-pass filter, low pass
Resonator is coupled with resonator where common cavity (2) on the right side of filter；Coupled structure in the high-pass filter includes electricity
Coupled structure (5) and magnetic coupling arrangement；The resonator is all stepped impedance structure.
2. a kind of highly selective miniaturized duplexer according to claim 1, it is characterised in that: the high-pass filter is logical
It include two electric coupling structures (5) in road, remaining is magnetic coupling arrangement.
3. a kind of highly selective miniaturized duplexer according to claim 1, it is characterised in that: the low-pass filter
The all magnetic coupling arrangements of coupled structure.
4. a kind of highly selective miniaturized duplexer according to claim 1, it is characterised in that: humorous in the shell (8)
It is connected between vibration device by even muscle (7), to increase magnetic coupling amount.
5. a kind of highly selective miniaturized duplexer according to claim 1, it is characterised in that: the structure of the duplexer
It is pectination cavity configuration.
6. a kind of highly selective miniaturized duplexer according to claim 1, it is characterised in that: pacify on the shell (8)
Equipped with tuning screw (3), the tuning screw (3) and the opening direction of coaxial borehole on each resonator are corresponded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820741546.6U CN208352501U (en) | 2018-05-18 | 2018-05-18 | A kind of highly selective miniaturized duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820741546.6U CN208352501U (en) | 2018-05-18 | 2018-05-18 | A kind of highly selective miniaturized duplexer |
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| Publication Number | Publication Date |
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| CN208352501U true CN208352501U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820741546.6U Active CN208352501U (en) | 2018-05-18 | 2018-05-18 | A kind of highly selective miniaturized duplexer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109860965A (en) * | 2019-04-04 | 2019-06-07 | 深圳市金科泰通信设备有限公司 | Highly selective miniaturization pectination and interdigital mixing cavity configuration duplexer |
| CN109950671A (en) * | 2019-04-03 | 2019-06-28 | 江苏贝孚德通讯科技股份有限公司 | Pectination duplexer |
| CN112768855A (en) * | 2020-12-30 | 2021-05-07 | 恒尔威科技(苏州)有限公司 | High-performance miniaturized base station antenna built-in cavity duplexer |
-
2018
- 2018-05-18 CN CN201820741546.6U patent/CN208352501U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950671A (en) * | 2019-04-03 | 2019-06-28 | 江苏贝孚德通讯科技股份有限公司 | Pectination duplexer |
| CN109860965A (en) * | 2019-04-04 | 2019-06-07 | 深圳市金科泰通信设备有限公司 | Highly selective miniaturization pectination and interdigital mixing cavity configuration duplexer |
| CN112768855A (en) * | 2020-12-30 | 2021-05-07 | 恒尔威科技(苏州)有限公司 | High-performance miniaturized base station antenna built-in cavity duplexer |
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