CN106033954B - A kind of antenna combiner - Google Patents
A kind of antenna combiner Download PDFInfo
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- CN106033954B CN106033954B CN201510106564.8A CN201510106564A CN106033954B CN 106033954 B CN106033954 B CN 106033954B CN 201510106564 A CN201510106564 A CN 201510106564A CN 106033954 B CN106033954 B CN 106033954B
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- inductance
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Abstract
The invention discloses a kind of antenna combiner, performance is higher.The antenna combiner includes multiple bandpass filters, electronic switch and combining module, in which: combining module includes low-pass filter and high-pass filter；The output end of low-pass filter is connected with the output end of low-pass filter, output end of the terminals after being connected as antenna combiner, for connecting antenna；In multiple bandpass filters, the output end that center operating frequency is less than the bandpass filter of assigned frequency is connected to the input terminal of the low-pass filter in combining module by electronic switch, and the output end that center operating frequency is more than or equal to the bandpass filter of assigned frequency is connected to the input terminal of the high-pass filter in combining module by electronic switch.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of antenna combiners.
Background technique
Currently, in a wireless communication system, each signal centre or communication vehicle are to overcome transmitter noise floor and more
The influence that antenna arrangement deteriorates antenna radiation pattern has been all made of antenna combiner, and antenna combiner is mainly by multiple only
Vertical bandpass filter composition.
Such as the antenna combiner of VHF (Very High Frequency, very high frequency(VHF)) frequency range, mainly by band internal impedance
It is multiple independent bandpass filter compositions of high resistant for 50 Ω, with external impedance.However, working as the frequency coverage system of antenna combiner
When number (i.e. the ratio of maximum operating frequency and lowest operating frequency) is greater than 2, the band external impedance of each bandpass filter can be with
Deviate the distance of center operating frequency gradually by 50 Ω to high resistant, then gradually by high resistant to low-resistance, i.e., each bandpass filter exists
Entire working frequency range shows two low-resistance characteristics, and Insertion Loss is larger, leads to the performance degradation of antenna combiner, or even can not
It uses.
Summary of the invention
The embodiment of the present invention provides a kind of antenna combiner, to improve performance.
The embodiment of the present invention provides a kind of antenna combiner, including multiple bandpass filters, electronic switch and combining module,
Wherein:
The combining module includes low-pass filter and high-pass filter；The output end of the low-pass filter and the height
The output end of bandpass filter is connected, output end of the terminals after being connected as the antenna combiner, for connecting antenna；
In the multiple bandpass filter, the output end that center operating frequency is less than the bandpass filter of assigned frequency passes through
The electronic switch is connected to the input terminal of the low-pass filter in the combining module, and center operating frequency is more than or equal to specified
The output end of the bandpass filter of frequency is connected to the defeated of the high-pass filter in the combining module by the electronic switch
Enter end.
Beneficial effect of the present invention includes:
Scheme provided in an embodiment of the present invention can filter band logical when the frequency coverage coefficient of antenna combiner is greater than 2
Wave device is divided into two parts according to center operating frequency, and center operating frequency lower part bandpass filter is connected to low pass filtered
Wave device, the higher a part of bandpass filter of center operating frequency are connected to high-pass filter, can lower Insertion Loss, so as to
Improve the performance of antenna combiner.
Other features and advantage will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood and implementing the application.The purpose of the application and other advantages can be by written explanations
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, is implemented with the present invention
Example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of antenna combiner provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the combining module in antenna combiner provided in an embodiment of the present invention.
Specific embodiment
High performance implementation is mentioned in order to provide, the embodiment of the invention provides a kind of antenna combiner, below in conjunction with
Preferred embodiment of the present invention will be described for Figure of description, it should be understood that preferred embodiment described herein is only used for
The description and interpretation present invention, is not intended to limit the present invention.And in the absence of conflict, the embodiment and reality in the application
The feature applied in example can be combined with each other.
The embodiment of the present invention provides a kind of antenna combiner, as shown in Figure 1, may include multiple bandpass filters, electronics
Switch and combining module, in which:
Being combined module includes low-pass filter and high-pass filter；The output end of low-pass filter and high-pass filter it is defeated
Outlet is connected, output end of the terminals after being connected as antenna combiner, for connecting antenna；
In multiple bandpass filters, the output end that center operating frequency is less than the bandpass filter of assigned frequency passes through electronics
Switch is connected to the input terminal of the low-pass filter in combining module, and the band logical that center operating frequency is more than or equal to assigned frequency is filtered
The output end of wave device is connected to the input terminal of the high-pass filter in combining module by electronic switch.
Antenna combiner provided in an embodiment of the present invention is used, when the frequency coverage coefficient of antenna combiner is greater than 2,
Bandpass filter can be divided into two parts, center operating frequency lower part bandpass filter according to center operating frequency
It is connected to low-pass filter, the higher a part of bandpass filter of center operating frequency is connected to high-pass filter, can lower
Insertion Loss, so as to improve the performance of antenna combiner.
Preferably, above-mentioned assigned frequency can specifically be determined using following manner:
Wherein: f is assigned frequency；
fminFor the lowest operating frequency of antenna combiner；
K is the frequency coverage coefficient of antenna combiner.
At this point, the frequency coverage coefficient k of antenna combiner be divided into frequency coverage coefficient beingTwo sections, by multiple bands
In bandpass filter, center operating frequency is less thanThe bandpass filter of assigned frequency is connected to the low pass filtered in combining module
Wave device, the bandpass filter that center operating frequency is more than or equal to assigned frequency are connected to the high-pass filter in combining module.
Since filter squareness factor can not be accomplished 1 by filter, high-pass filter and low-pass filter are being held in the mouth
Connecing frequency, nearby Insertion Loss is big, and therefore, combining module can be made of two groups of different high-pass and low-pass filters of cutoff frequency, can subtract
Small Insertion Loss.That is combining module specifically includes two low-pass filters and two high-pass filters；Specifically, two low-pass filters
Cutoff frequency can be respectively f and f+F, the cutoff frequency of two high-pass filters can be respectively f and f+F, wherein f is
Assigned frequency, F are the bandwidth of bandpass filter.
In one particular embodiment of the present invention, as shown in Fig. 2, above-mentioned low-pass filter can specifically include four
One inductance L11~L14, three second inductance L21~L23, three first capacitor C11~C13, three the second capacitor C21~
C23, three third capacitor C31~C33 and three first diode D11~D13, in which:
Four the first inductance series connection, branch both ends in series respectively correspond low-pass filter input terminal and output end；
One end of wiring node and a first capacitor between adjacent first inductance of every two, one end of second capacitor are connected；It should
The other end of first capacitor and the anode of a first diode are connected, the terminals ground connection after being connected；Second capacitor it is another
One end is connected with one end of the cathode of the first diode, second inductance；The centre tap of second inductance and one
One end of three capacitors is connected, the other end ground connection of the third capacitor；The other end of three the second inductance is connected, the wiring after being connected
Hold the control terminal CTL-L as low-pass filter.
When control terminal CTL-L inputs negative voltage and positive voltage, the center operating frequency of low-pass filter is different.
As shown in Fig. 2, above-mentioned high-pass filter can specifically include three the 4th capacitor C41~C43, two the 5th capacitors
C51, C52, two the 6th capacitor C61, C62, two the 7th capacitor C71, C72, two third inductance L31, L32, two the 4th
Inductance L41, L42 and two second diodes D21, D22, in which:
Three the 4th capacitor series connection, branch both ends in series respectively correspond high-pass filter input terminal and output end；
One end of wiring node and a third inductance between adjacent 4th capacitor of every two is connected；The other end of the third inductance and one
One end of a 5th capacitor, one end of the 6th capacitor are connected；The other end of 5th capacitor and second diode
Anode is connected, the terminals ground connection after being connected；The other end of 6th capacitor and cathode, the 4th electricity of second diode
One end of sense is connected；The centre tap of 4th inductance and one end of the 7th capacitor are connected, the other end of the 7th capacitor
Ground connection；The other end of two the 4th inductance is connected, control terminal CTL-H of the terminals after being connected as high-pass filter.
When control terminal CTL-H inputs negative voltage and positive voltage, the center operating frequency of high-pass filter is different.
When it is implemented, being directed to the debugging of low-pass filter, after circuit board being assembled according to Fig. 2, high pass filter is removed
The control terminal CTL-L of C43 in wave device, connected vector Network Analyzer, low-pass filter input negative voltage, make first diode
D11~D13 conducting, second capacitor C21~C23 of adjustment make the cutoff frequency f of low-pass filter, and pass band insertion loss and stopband inhibit
It meets the requirements；Control terminal CTL-L inputs positive voltage, ends first diode D11~D13, adjusts first inductance L11~L14
Make the cutoff frequency f+F of low-pass filter, pass band insertion loss and stopband inhibition are met the requirements.
For the debugging of high-pass filter, the L14 in low-pass filter can be removed, connected vector Network Analyzer is high
The control terminal CTL-H of bandpass filter inputs negative voltage, and second diode D21, D22 is connected, and the 6th capacitor C61, C62 of adjustment makes
The cutoff frequency of high-pass filter is f, and pass band insertion loss and stopband inhibition are met the requirements；The control terminal CTL-H of high-pass filter is defeated
Enter positive voltage, end second diode D21, D22, adjustment third inductance L31, L32 make the cutoff frequency f of high-pass filter
+ F, pass band insertion loss and stopband inhibition are met the requirements.
Low-pass filter shown in Fig. 2, high-pass filter specific structure be only an example, be not used to limit this hair
Bright, in other embodiments of the invention, low-pass filter, high-pass filter can also be realized using other way.
Antenna combiner provided in an embodiment of the present invention is specifically as follows the antenna combiner of VHF frequency range.
In conclusion using scheme provided in an embodiment of the present invention, when frequency coverage coefficient is greater than 2, compared to existing
Technology can be improved the performance of antenna combiner, the antenna combiner especially for frequency coverage coefficient less than 4, and effect is preferable.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (5)
1. a kind of antenna combiner, which is characterized in that including multiple bandpass filters, electronic switch and combining module, in which:
The combining module includes low-pass filter and high-pass filter；The output end of the low-pass filter and high pass filter
The output end of wave device is connected, output end of the terminals after being connected as the antenna combiner, for connecting antenna；
In the multiple bandpass filter, the output end that center operating frequency is less than the bandpass filter of assigned frequency passes through described
Electronic switch is connected to the input terminal of the low-pass filter in the combining module, and center operating frequency is more than or equal to assigned frequency
Bandpass filter output end by the electronic switch be connected to it is described combining module in high-pass filter input terminal；
Wherein, the low-pass filter specifically includes four the first inductance, three the second inductance, three first capacitors, three
Two capacitors, three third capacitors and three first diodes, in which:
Four the first inductance series connection；
One end of wiring node and a first capacitor between adjacent first inductance of every two, second capacitor one end phase
Even；The other end of the first capacitor and the anode of a first diode are connected, the terminals ground connection after being connected；Second capacitor
The other end be connected with one end of the cathode of the first diode, second inductance；The centre tap of second inductance and one
One end of a third capacitor is connected, the other end ground connection of the third capacitor；
The other end of three second inductance is connected, control terminal of the terminals after being connected as the low-pass filter.
2. antenna combiner as described in claim 1, which is characterized in that the assigned frequency specifically uses following manner true
It is fixed:
Wherein: f is assigned frequency；
fminFor the lowest operating frequency of antenna combiner；
K is the frequency coverage coefficient of antenna combiner.
3. antenna combiner as described in claim 1, which is characterized in that the combining module specifically includes two low-pass filtering
Device and two high-pass filters；The cutoff frequency of two low-pass filters is respectively f and f+F, the cut-off of two high-pass filters
Frequency is respectively f and f+F, wherein f is the assigned frequency, and F is the bandwidth of the bandpass filter.
4. antenna combiner as described in claim 1, which is characterized in that the high-pass filter specifically includes three the 4th electricity
Appearance, two the 5th capacitors, two the 6th capacitors, two the 7th capacitors, two third inductance, two the 4th inductance and two second
Diode, in which:
Three the 4th capacitors series connection；
One end of wiring node and a third inductance between adjacent 4th capacitor of every two is connected；The other end of the third inductance
It is connected with one end of one end of the 5th capacitor, the 6th capacitor；The other end of 5th capacitor and the two or two pole
The anode of pipe is connected, the terminals ground connection after being connected；The cathode of the other end of 6th capacitor and second diode, one the
One end of four inductance is connected；One end of the centre tap of 4th inductance and the 7th capacitor is connected, the 7th capacitor it is another
One end ground connection；
The other end of described two 4th inductance is connected, control terminal of the terminals after being connected as the high-pass filter.
5. the antenna combiner as described in claim 1-4 is any, which is characterized in that the antenna combiner is specially very high frequency(VHF)
The antenna combiner of VHF frequency range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106564.8A CN106033954B (en) | 2015-03-11 | 2015-03-11 | A kind of antenna combiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106564.8A CN106033954B (en) | 2015-03-11 | 2015-03-11 | A kind of antenna combiner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106033954A CN106033954A (en) | 2016-10-19 |
| CN106033954B true CN106033954B (en) | 2019-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510106564.8A Expired - Fee Related CN106033954B (en) | 2015-03-11 | 2015-03-11 | A kind of antenna combiner |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112532772B (en) * | 2020-11-23 | 2023-09-19 | 惠州Tcl移动通信有限公司 | Antenna tuning circuit, implementation method and mobile terminal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764588A (en) * | 2008-12-22 | 2010-06-30 | 索尼株式会社 | Filter circuit and communication device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8457578B2 (en) * | 2008-12-30 | 2013-06-04 | Qualcomm Incorporated | Discrete time receiver |
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2015
- 2015-03-11 CN CN201510106564.8A patent/CN106033954B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764588A (en) * | 2008-12-22 | 2010-06-30 | 索尼株式会社 | Filter circuit and communication device |
Non-Patent Citations (1)
| Title |
|---|
| 天线共用器;陈伟明;《移动通信》;20020731(第7期);第53-54页 |
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| CN106033954A (en) | 2016-10-19 |
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