CN214706199U - 700&900MHz antenna built-in interdigital filtering combiner - Google Patents
700&900MHz antenna built-in interdigital filtering combiner Download PDFInfo
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- CN214706199U CN214706199U CN202023228542.4U CN202023228542U CN214706199U CN 214706199 U CN214706199 U CN 214706199U CN 202023228542 U CN202023228542 U CN 202023228542U CN 214706199 U CN214706199 U CN 214706199U
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Abstract
A built-in interdigital filtering combiner of a 700&900MHz antenna comprises a cavity, an upper shielding cover plate arranged on the top surface of the cavity and a lower shielding cover plate arranged on the bottom surface of the cavity, wherein two filter circuits with different frequency bands are arranged at the left end and the right end in the cavity, and a common resonance unit is arranged between the two filter circuits; the two ends of the bottom surface of the lower shielding cover plate are provided with radio frequency cable interfaces which are connected with the input ends of the two paths of filter circuits with different frequency bands, the output ends of the two paths of filter circuits with different frequency bands are connected with the input end of the common resonance unit, the output end of the common resonance unit is connected with the radio frequency cable at the antenna end, and the common resonance unit is used for coupling and transmitting the two paths of signal sources to the radio frequency cable at the antenna end. The utility model provides a pair of 700&900MHz antenna embeds interdigital filtering combiner is small, can install inside antenna protection casing, with the information source coupling of two way different frequency channels, can use a pair antenna transmission signal.
Description
Technical Field
The utility model relates to a 700&900MHz antenna embeds interdigital type filtering combiner belongs to mobile communication technical field.
Background
In the network coverage construction of a mobile communication system, if source equipment in different frequency bands respectively use a pair of antennas, no matter the source equipment is erected on the same pole or in different poles, resources are wasted in the aspects of economy, technology, field utilization and the like. In order to achieve the purpose of saving cost, a microwave antenna combiner meeting the requirements of combining different communication systems needs to be adopted to combine the information sources of different frequency bands, and a pair of antennas is used.
Most combiners in the current market are designed and realized by a scheme of independently installing outside an antenna and utilizing a coaxial resonant cavity, if the 700&900MHz combiner is designed by the scheme, the product size is large, and the combiner has the following two adverse factors to reduce market competitiveness: 1. the occupied installation space is large, and the antenna protective cover is inconvenient to install inside the antenna protective cover; 2. the production and manufacturing materials and machining costs are high.
Disclosure of Invention
The utility model aims to overcome not enough among the prior art, provide a 700&900MHz antenna embeds interdigital filtering combiner, small can install inside the antenna protection casing, with the information source coupling of two way different frequency channels, can use a pair antenna transmission signal.
In order to achieve the above object, the utility model provides a 700&900MHz antenna built-in interdigital filtering combiner, which comprises a cavity, an upper shielding cover plate arranged on the top surface of the cavity and a lower shielding cover plate arranged on the bottom surface of the cavity, wherein two filters with different frequency ranges are arranged at the left and right ends in the cavity, and a common resonance unit is arranged between the two filters;
the antenna end radio frequency cable is connected with the output end of the common resonance unit, and the common resonance unit is used for coupling and transmitting two paths of signal sources to the antenna end radio frequency cable.
Preferably, the radio frequency cable and the antenna end radio frequency cable are semi-flexible radio frequency coaxial cables.
Further, the two filter circuits with different frequency bands are respectively:
the passage 1 includes: 6 resonance units with the frequency range of 694-862MHz are added with 1 high-frequency rejection zero band-pass filter,
the passage 2 includes: and 4 resonance units with the frequency range of 880-960MHz and a low-frequency rejection zero band-pass filter of 1.
Furthermore, 11 self-locking tuning screws are installed on the side panel of the cavity and connected with the top of each resonant unit in the cavity for finely adjusting the resonant frequency.
Further, the path 1 has mounting holes for mounting the inductive cross-coupling lines on the 4 th and 6 th resonance units adjacent to the common resonance unit.
Furthermore, the inductive cross-coupling wire is fixed in the mounting hole by soldering to form inductive cross-coupling, so as to enhance the out-of-band rejection of the path filter.
Furthermore, capacitive cross coupling sheets are mounted on the 1 st and 3 rd resonance units of the path 2, which are far away from the common resonance unit, and an insulating medium sheet is padded between the capacitive cross coupling sheets and the 1 st and 3 rd resonance units and fixed by using screws.
Preferably, the insulating medium sheet is made of PEI.
Preferably, a PEEK insulating fastening screw is selected to lock and fix the capacitive cross coupling piece and the resonance unit.
Further, the capacitive cross coupling piece is used for enhancing the out-of-band rejection of the filter.
Furthermore, the left side and the right side of the bottom surface of the lower shielding cover plate are respectively provided with a group of mounting lugs for mounting two paths of radio frequency cables, the radio frequency cables are connected with the mounting lugs, and inner conductors of the radio frequency cables are welded with interfaces of the radio frequency cables.
Furthermore, a group of mounting lugs is arranged on the central line of the lower shielding cover plate and on the side surface of the lower shielding cover plate, and is used for mounting the antenna end radio frequency cable, the antenna end radio frequency cable is connected with the mounting lugs, and an inner conductor of the antenna end radio frequency cable is welded with an interface of the antenna end radio frequency cable.
Further, the upper shielding cover plate and the lower shielding cover plate are welded on the top surface and the bottom surface of the cavity through soldering tin.
Compared with the prior art, the utility model discloses the beneficial effect who reaches:
the utility model discloses install the filter circuit of two ways different frequency channels at both ends about in the cavity, install public resonance unit between the two ways of filters, public resonance unit can transmit after coupling the signal source of two ways different frequency channels to antenna end radio frequency cable, compact structure, small, the quality is light, can install inside the antenna protection casing, the integrated level is high, product performance is stable and reliable, more be suitable for batch production, production efficiency is high, the product uniformity is high, the manufacturing material and machining cost are low;
the utility model discloses install perception cross coupling line and capacitive cross coupling piece in the filter circuit of different frequency channels respectively, can strengthen the outband suppression of place route filter, reduce the intermodulation influence, reduce insertion loss.
Drawings
Fig. 1 is a schematic structural diagram of a 700&900MHz antenna built-in interdigital filtering combiner according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an internal structure of a cavity of a 700&900MHz antenna incorporating an interdigital filtering combiner according to an embodiment of the present invention;
fig. 3 is a side view of a cavity with an interdigital filtering combiner disposed inside a 700&900MHz antenna according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating an installation of an inductive cross-coupling line of an interdigital filtering combiner built in a 700&900MHz antenna according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating an installation of capacitive cross coupling plates of an interdigital filtering combiner disposed in a 700&900MHz antenna according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a lower shielding cover plate of a 700&900MHz antenna built-in interdigital filtering combiner according to an embodiment of the present invention.
In the figure: 1. a cavity; 2. an upper shielding cover plate; 3. a lower shield cover plate; 4. a capacitive cross-coupling tab; 5. an insulating dielectric sheet; 6. PEEK insulating fastening screws; 7. a semi-flexible radio frequency coaxial cable; 8. a radio frequency cable/antenna end radio frequency cable interface; 9. an inductive cross-coupled line; 10. a self-locking tuning screw; 11. a common resonance unit.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to describe distinctions and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
The utility model provides a 700&900MHz antenna embeds interdigital filtering combiner is 700MHz and 900MHz signal coupling of information source, uses a pair antenna transmission signal with two tunnel frequency channels.
As shown in fig. 1, a 700&900MHz antenna built-in interdigital filtering combiner includes a cavity 1, an upper shielding cover plate 2 installed on the top surface of the cavity 1, and a lower shielding cover plate 3 installed on the bottom surface of the cavity 1, wherein the upper shielding cover plate 2 and the lower shielding cover plate 3 are welded on the top surface and the bottom surface of the cavity 1 by soldering tin.
As shown in fig. 1 and 2, two filter circuits with different frequency bands are installed at the left end and the right end in the cavity 1, and a common resonance unit 11 is installed between the two filter circuits with different frequency bands.
Specifically, the two filter circuits with different frequency bands are respectively:
the passage 1 includes: 6 resonance units with the frequency range of 694-862MHz are added with 1 high-frequency rejection zero band-pass filter,
the passage 2 includes: and 4 resonance units with the frequency range of 880-960MHz and a low-frequency rejection zero band-pass filter of 1.
The technical specification of the electrical property of the built-in interdigital filtering combiner of the 700&900MHz antenna is shown in the following table:
as shown in fig. 3, there are 11 resonant units in the cavity 1, including 6 resonant units of the path 1, 4 resonant units of the path 2, and 1 common resonant unit 11. 11 self-locking tuning screw rods 10 are installed on the side panel of the cavity 1, and the self-locking tuning screw rods 10 are connected with the top of each corresponding resonance unit to make up for processing errors and finely adjust resonance frequency.
As shown in fig. 4, which is a schematic diagram of the installation of the inductive cross-coupled line 9, the 4 th and 6 th resonant units of the path 1 close to the common resonant unit 11 have installation holes for installing the inductive cross-coupled line 9. The inductive cross-coupled lines 9 are fixed in the mounting holes by soldering to form inductive cross-coupling, and are used for enhancing the out-of-band rejection of the path filter.
In this embodiment, the inductive cross-coupled line 9 is a copper wire plated with phi 1 silver.
As shown in fig. 5, which is a schematic diagram of the installation of the capacitive cross-coupling plate 4, the capacitive cross-coupling plate 4 is installed on the 1 st and 3 rd resonance units of the path 2 far from the common resonance unit 11, and the insulating dielectric plate 5 made of PEI material is padded between the capacitive cross-coupling plate 4 and the 1 st and 3 rd resonance units and fixed by using PEEK insulating fastening screws 6. The capacitive cross-coupling patch 4 is used to enhance the out-of-band rejection of the present path filter.
After two filter circuits with different frequency bands in the cavity 1, the capacitive cross coupling piece 4 and the inductive cross coupling line 9 required in the circuits are installed, the upper shielding cover plate 2 is welded on the top surface of the cavity 1 by soldering tin.
As shown in fig. 6, the left and right sides of the bottom surface of the lower shielding cover plate 3 are respectively provided with a set of mounting ears and radio frequency cable interfaces 8, and the mounting ears are used for mounting two paths of radio frequency cables. A tap line is arranged in the radio frequency cable/antenna end radio frequency cable interface 8, an outer conductor of the radio frequency cable is welded and fixed with the mounting lug by using soldering tin, an inner conductor of the radio frequency cable is welded with the tap line arranged in the radio frequency cable interface 8, and the radio frequency cable is connected into the input ends of the two filters. The output ends of the two filter circuits with different frequency bands are connected with the input end of the common resonance unit 11, the output end of the common resonance unit 11 is connected with the antenna end radio frequency cable, and the common resonance unit 11 is used for coupling the two signal sources and then transmitting the two signal sources to the antenna end radio frequency cable. A group of mounting lugs and an antenna end radio frequency cable interface 8 are arranged on the central line of the lower shielding cover plate 3 from top to bottom, the mounting lugs are used for mounting the antenna end radio frequency cable, the outer conductor of the antenna end radio frequency cable and the mounting lugs are welded and fixed through soldering tin, and the inner conductor of the antenna end radio frequency cable is welded with a tap wire arranged in the antenna end radio frequency cable interface 8.
It should be noted that the radio frequency cable and the antenna end radio frequency cable are both semi-flexible radio frequency coaxial cables 7. In this embodiment, the stub wire built in the rf cable/antenna end rf cable interface 8 is a phi 1.2 silver-plated copper wire.
After the radio frequency cable and the radio frequency cable at the antenna end are welded and fixed on the mounting lug, the lower shielding cover plate 3 is welded on the bottom surface of the cavity 1 by the soldering tin, and then the inner conductor of the radio frequency cable is welded with the corresponding tap wire arranged in the radio frequency cable interface 8.
Compared with the prior art, the utility model discloses compact structure, ultra-thin, light in weight, easily antenna protection casing internally mounted of volume, advantages such as the intersystem isolation of insertion loss less, intermodulation suppression degree height, ideal satisfy each item index requirement of operator. The utility model discloses, a 700&900MHz antenna embeds interdigital filtering combiner has the characteristics that the integrated level is high, the stable performance is reliable, more is suitable for batch production, and other products of the same kind are compared to production efficiency and product uniformity and are improved by a wide margin.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. A built-in interdigital filtering combiner of a 700&900MHz antenna is characterized by comprising a cavity, an upper shielding cover plate arranged on the top surface of the cavity and a lower shielding cover plate arranged on the bottom surface of the cavity, wherein two filter circuits with different frequency bands are arranged at the left end and the right end in the cavity, and a common resonance unit is arranged between the two filter circuits;
the antenna end radio frequency cable is connected with the output end of the common resonance unit, and the common resonance unit is used for coupling and transmitting two paths of signal sources to the antenna end radio frequency cable.
2. The 700&900MHz antenna built-in interdigital filtering combiner according to claim 1, wherein the two filter circuits with different frequency bands are respectively:
the passage 1 includes: 6 resonance units with the frequency range of 694-862MHz are added with 1 high-frequency rejection zero band-pass filter,
the passage 2 includes: and 4 resonance units with the frequency range of 880-960MHz and a low-frequency rejection zero band-pass filter of 1.
3. The 700&900MHz antenna built-in interdigital filtering combiner of claim 2, wherein 11 self-locking tuning screws are mounted on a side panel of the cavity, and connected to the top of each resonant unit in the cavity for fine tuning of resonant frequency.
4. The built-in interdigital filtering combiner for 700&900MHz antenna of claim 2, wherein the path 1 has mounting holes for mounting the inductive cross-coupling lines on the 4 th and 6 th resonating units adjacent to the common resonating unit.
5. The 700&900MHz antenna built-in interdigital filtering combiner of claim 4, wherein the inductive cross-coupling wires are soldered in the mounting holes to form inductive cross-coupling for enhancing out-of-band rejection of the present path filter.
6. The 700&900MHz antenna built-in interdigital filtering combiner of claim 2, wherein capacitive cross coupling pieces are mounted on the 1 st and 3 rd resonant units of the path 2 far from the common resonant unit, and an insulating dielectric piece is padded between the capacitive cross coupling pieces and the 1 st and 3 rd resonant units and fixed by using screws.
7. The 700&900MHz antenna built-in interdigital filtering combiner according to claim 6, wherein the capacitive cross-coupling patch is configured to enhance out-of-band rejection of the present path filter.
8. The 700&900MHz antenna built-in interdigital filtering combiner of claim 1, wherein a set of mounting ears are respectively disposed on the left and right sides of the bottom surface of the lower shielding cover plate for mounting two rf cables, the rf cables are connected to the mounting ears, and inner conductors of the rf cables are welded to the rf cable interfaces.
9. The 700&900MHz antenna internal interdigital filtering combiner of claim 1, wherein a group of mounting lugs is arranged on the center line of the lower shielding cover plate from the top to the side surface of the lower shielding cover plate, and is used for mounting an antenna end radio frequency cable, the antenna end radio frequency cable is connected with the mounting lugs, and an inner conductor of the antenna end radio frequency cable is welded with an interface of the antenna end radio frequency cable.
10. The 700&900MHz in-antenna interdigital filtering combiner of claim 1, wherein the upper and lower shielding plates are soldered to the top and bottom surfaces of the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023228542.4U CN214706199U (en) | 2020-12-29 | 2020-12-29 | 700&900MHz antenna built-in interdigital filtering combiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023228542.4U CN214706199U (en) | 2020-12-29 | 2020-12-29 | 700&900MHz antenna built-in interdigital filtering combiner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214706199U true CN214706199U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023228542.4U Active CN214706199U (en) | 2020-12-29 | 2020-12-29 | 700&900MHz antenna built-in interdigital filtering combiner |
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| Country | Link |
|---|---|
| CN (1) | CN214706199U (en) |
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- 2020-12-29 CN CN202023228542.4U patent/CN214706199U/en active Active
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