CN110444838A - The duplexer that can be tuned in the case where not changing other important parameters - Google Patents
The duplexer that can be tuned in the case where not changing other important parameters Download PDFInfo
- Publication number
- CN110444838A CN110444838A CN201910750870.3A CN201910750870A CN110444838A CN 110444838 A CN110444838 A CN 110444838A CN 201910750870 A CN201910750870 A CN 201910750870A CN 110444838 A CN110444838 A CN 110444838A
- Authority
- CN
- China
- Prior art keywords
- fixedly installed
- duplexer
- tuned
- changing
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention relates to duplexer technical fields, and disclose a kind of duplexer that can be tuned in the case where not changing other important parameters, the internal slide of fixed tuning plug is connected with removable tuning plug, shift(ing) ring is fixedly installed at the top of removable tuning plug, radio frequency connector is fixedly installed at the top of capping, radio-frequency coupling ring is fixedly installed in the bottom of radio frequency connector, conduction pipe is fixedly installed on the left of radio-frequency coupling ring, the capacitor of tunable medium is fixedly installed at the top of conduction pipe, fixed groove is equipped in the right side opening of removable tuning plug, it is fixedly installed with guide post and spring respectively in the inside of capping, guide sleeve is connected in the slide outside of guide post, fixed chuck is fixedly installed on the left of guide sleeve.The duplexer that can be tuned in the case where not changing other important parameters, reaching can be tuned in the case where not changing other important parameters.
Description
Technical field
The present invention relates to duplexer technical field, specially one kind can in the case where not changing other important parameters into
The duplexer of row tuning.
Background technique
Existing duplexer all there are problems that be tuned in the case where not changing other important parameters, make
Obtaining duplexer cannot be tuned under normal use, and certain defect is brought to the use of duplexer, is not adapted to certain
Frequency variation, reduces the practicability of duplexer, is not able to satisfy the use demand of user.
Such as Chinese patent Granted publication are as follows: a kind of three mould of single-chamber based on microstrip-fed slot-coupled of CN105720331A
Band logical duplexer, inventing maximum advantage is exactly that inside cavity does not have any thing, no corner cut, no probe, no tuning screw,
It ensure that the original and integrality of mode, but duplexer cannot be tuned, do not have very strong adaptability.
In order to solve problem above, inventor proposes that one kind can be adjusted in the case where not changing other important parameters
Humorous duplexer has in the case where not changing other important parameters, the advantages of being tuned to duplexer, can finely tune double
Work device keeps its working effect more preferable, is conducive to the situation that duplexer copes with some complexity, improves the practicability of the device.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides one kind can in the case where not changing other important parameters into
The duplexer of row tuning, has in the case where not changing other important parameters, the advantages of being tuned to duplexer, solves
The problem of can not being tuned in the case where not changing other important parameters.
(2) technical solution
It is above-mentioned in the case where not changing other important parameters to realize, to the purpose that duplexer is tuned, the present invention
It provides the following technical solutions: the duplexer that one kind can be tuned in the case where not changing other important parameters, including it is double
Work device is fixedly installed with signal connecting tube on the right side of the duplexer, is fixedly installed with communication line in the right end of signal connecting tube,
It is fixedly installed with input pipe and efferent duct respectively in the left end of duplexer, fixed bung flange is connected on the left of input pipe
One, be connected with fixed bung flange two in the left end of efferent duct, the inside of duplexer be fixedly installed with respectively receiving cavity and
Emission cavity is fixedly installed with communication tube on the right side of receiving cavity, is fixedly installed with receiver in the right end of communication tube, is sending out
The right side for penetrating cavity is fixedly installed with transmitter by communication tube, is fixedly installed with three by communication tube in the left side of receiving cavity
Spool is fixedly connected by communication tube with emission cavity in the bottom of three spools, is fixed in the left side of three spools by communication tube
Antenna is installed, is fixedly installed with capping in the inside of emission cavity, is fixedly installed with fixed tuning plug, In in the bottom of capping
The internal slide of fixed tuning plug is connected with removable tuning plug, is fixedly installed with shift(ing) ring at the top of removable tuning plug,
It is fixedly installed with radio frequency connector at the top of capping, is fixedly installed with radio-frequency coupling ring in the bottom of radio frequency connector, is penetrating
It is fixedly installed with conduction pipe on the left of frequency coupling ring, the capacitor of tunable medium is fixedly installed at the top of conduction pipe, can
The right side opening of mobile tuning plug is equipped with fixed groove, guide post and spring is fixedly installed with respectively in the inside of capping, in guide post
Slide outside is connected with guide sleeve, and fixed chuck is fixedly installed on the left of guide sleeve.
Further include radio frequency connecting pin, is electrically connected with coupling ring two in the bottom of radio frequency connecting pin, it is separate in coupling ring two
The movement of radio frequency connecting pin is fixedly connected with variable condenser two, is connected separately with coupling ring in the output end of variable condenser two
One, variable condenser one, ground wire, coupling ring one are in parallel with variable condenser one.
Preferably, the emission cavity and receiving cavity are respectively uniformly distributed inside that of duplexer, are conducive to duplex
The work of device improves the performance of duplexer.
Preferably, the fixed tuning plug is located at the middle part of emission cavity, is conducive to be tuned duplexer.
Preferably, all devices of the inside of the emission cavity are all made of silver-plated process, reduce kwh loss, are conducive to
The work and tuning of device.
Preferably, the emission cavity is made of copper material, is conducive to the working performance for improving reflection chamber.
Preferably, the receiving cavity has structure identical with emission cavity, in order to guarantee the normal work of duplexer.
Preferably, the fixed groove is evenly distributed on the right side of removable tuning plug, and the structure of fixed chuck and solid
The structure for determining groove is corresponding, is conducive to adjust the position that can move tuning plug, be tuned.
(3) beneficial effect
Compared with prior art, the present invention provides one kind to be adjusted in the case where not changing other important parameters
Humorous duplexer, have it is following the utility model has the advantages that
1, the duplexer that can be tuned in the case where not changing other important parameters passes through mobile shift(ing) ring meeting
The movement for driving removable tuning plug moves the mobile meeting of tuning plug so that fixed chuck movement, the mobile meeting of fixed chuck
Fixed chuck can be pressed into fix under the action of the spring by compressed spring when removable tuning plug is moved to suitable position
Groove, the position of fixed removable tuning plug, to change coupler two and variable condenser two cooperates, so that reaching can be
The effect being tuned in the case where not changing other important parameters.
2, the duplexer that can be tuned in the case where not changing other important parameters, it is uniform by fixed groove
It is distributed in the right side of removable tuning plug, then cooperates the use of fixed chuck, can accurately adjust the position of removable tuning plug,
To achieve the effect that precision tuning, so that duplexer has better working effect, the practicability of the device is improved.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural schematic diagram of duplexer；
Fig. 3 is the structural schematic diagram of emission cavity；
Fig. 4 is the structural schematic diagram of removable tuning plug；
Fig. 5 is the structural schematic diagram of capping；
Fig. 6 is emission cavity equivalent circuit diagram.
In figure: 1- duplexer, 2- signal connecting tube, 3- communication line, 4- input pipe, 5- efferent duct, 6- fixed bung flange two, 7-
Fixed bung flange one, 8- receiving cavity, 9- emission cavity, 10- communication tube, 11- receiver, 12- transmitter, tri- spool of 13-, 14-
Antenna, 15- move tuning plug, 16- fixed tuning plug, 17- capping, 18- shift(ing) ring, 19- radio frequency connector, 20- radio frequency coupling
Cyclization, 21- conduction pipe, the capacitor of 22- tunable medium, 23- fixed groove, 24- guide post, 25- spring, 26- guide sleeve, 27- are solid
Determine clamp.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of duplexer that can be tuned in the case where not changing other important parameters referring to FIG. 1-2, including
Duplexer 1, the right side of duplexer 1 are fixedly installed with signal connecting tube 2, carry out the transmission of signal, and fixed with communication line 3,
It is fixedly installed with communication line 3 in the right end of signal connecting tube 2, is fixedly installed with input pipe 4 and defeated respectively in the left end of duplexer 1
Outlet pipe 5 is connected with fixed bung flange 1 in the left side of input pipe 4, is used to fixed communication line 3, living in the left end of efferent duct 5
It is dynamic to be connected with fixed bung flange 26, it is used to fixed communication line 3, is fixedly installed with 8 He of receiving cavity respectively in the inside of duplexer 1
Emission cavity 9 avoids receiving signal and issues the main structure of blurring, is fixedly installed on the right side of receiving cavity 8 logical
Fuse tube 10 is fixedly installed with receiver 11 in the right end of communication tube 10, for receiving signal, In for carrying out the transmission of signal
The right side of emission cavity 9 is fixedly installed with transmitter 12 by communication tube 10, for emitting signal, receiver 11 and transmitter 12
Working frequency it is different, what is both effectively avoided obscures, and is fixedly installed with three lines by communication tube 10 in the left side of receiving cavity 8
Pipe 13 carries out the separation or doubling of signal, realizes to receive signal and issue signal and leans on antenna 14 entirely, logical in the bottom of three spools 13
It crosses communication tube 10 to be fixedly connected with emission cavity 9, antenna 14 is fixedly installed with by communication tube 10 in the left side of three spools 13, into
The transmitting or reception of row signal.
Fig. 3-5 is please referred to, is fixedly installed with capping 17 in the inside of emission cavity 9, is conducive to the practicability for improving device,
Emission cavity 9 and receiving cavity 8 are respectively uniformly distributed inside that of duplexer 1, are conducive to the work of duplexer 1, are improved double
The performance of work device 1 is fixedly installed with fixed tuning plug 16 in the bottom of capping 17, and fixed tuning plug 16 is located at emission cavity 9
Middle part is conducive to be tuned duplexer 1, and all devices of the inside of emission cavity 9 are all made of silver-plated process, reduces electricity
Loss is conducive to the work and tuning of device, and emission cavity 9 is made of copper material, is conducive to the work for improving reflection chamber 9
Make performance, receiving cavity 8 has structure identical with emission cavity 9, in order to guarantee the normal work of duplexer 1, adjusts fixed
The internal slide of humorous bar 16 is connected with removable tuning plug 15, is fixedly installed with shift(ing) ring at the top of removable tuning plug 15
18, it is fixedly installed with radio frequency connector 19 at the top of capping 17, is fixedly installed with radio frequency coupling in the bottom of radio frequency connector 19
Cyclization 20 is fixedly installed with conduction pipe 21 in the left side of radio-frequency coupling ring 20, is fixedly installed at the top of conduction pipe 21 adjustable
The capacitor 22 of medium is equipped with fixed groove 23 in the right side opening of removable tuning plug 15, and fixed groove 23 is evenly distributed on can
The right side of mobile tuning plug 15, and the structure of fixed chuck 27 is corresponding with the structure of fixed groove 23, being conducive to adjusting can be with
The position of mobile tuning plug 15, is tuned, and guide post 24 and spring 25 is fixedly installed with respectively in the inside of capping 17, in guide post
24 slide outside is connected with guide sleeve 26, is fixedly installed with fixed chuck 27 in the left side of guide sleeve 26.
Referring to Fig. 6, further including radio frequency connecting pin A, in radio frequency connecting pin, the bottom of A is electrically connected with two L2 of coupling ring,
It is fixedly connected with two C2 of variable condenser far from the movement of radio frequency connecting pin A in two L2 of coupling ring, two C2's of variable condenser
Output end is connected separately with one L1 of coupling ring, one C1 of variable condenser, ground wire GND, one L1 of coupling ring and one C1 of variable condenser
The shift in position of parallel connection, removable tuning plug 15 can make the value of two C2 of two L2 of coupling ring and variable capacitance change, and realize
In the case where not changing other important parameters, it is tuned.
Working principle: using the duplexer that can be tuned in the case where not changing other important parameters, make
User adjusts the height of shift(ing) ring 18, and the movement of shift(ing) ring 18 will drive the movement of removable tuning plug 15, moves tuning plug
15 mobile can squeeze fixed chuck 27, and the movement of fixed chuck 27 will drive the movement of guide sleeve 26, and the mobile of guide sleeve 26 can press
Contracting spring 25 is moved to position appropriate when removable tuning plug 15, will push guide sleeve 26, guide sleeve under the action of spring 25
26 movement will push fixed chuck 27, and fixed chuck 27 and fixed card slot 23 cooperate, the position of fixed removable tuning plug 15,
The mobile meeting of removable tuning plug 15 is tuned so that the value of two C2 of two L2 of coupling ring and variable capacitance changes, thus
Achieve the effect that be tuned in the case where not changing other important parameters.
In conclusion the duplexer that can be tuned in the case where not changing other important parameters, passes through movement
Shift(ing) ring 18 will drive the movement of removable tuning plug 15, move tuning plug 15 mobile meeting so that fixed chuck 27 move,
The mobile meeting compressed spring 25 of fixed chuck 27, when removable tuning plug 15 is moved to suitable position, in the work of spring 25
Fixed chuck 27 can be pressed into fixed groove 23, the position of fixed removable tuning plug 15, to change two L2 of coupler under
Cooperate with two C2 of variable condenser, to achieve the effect that be tuned in the case where not changing other important parameters.
The duplexer that can be tuned in the case where not changing other important parameters, it is uniform by fixed groove 23
It is distributed in the right side of removable tuning plug 15, then cooperates the use of fixed chuck 27, can accurately adjust removable tuning plug 15
Position, so that duplexer 1 has better working effect, improve the practicability of the device to achieve the effect that precision tuning.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. the duplexer that can be tuned in the case where not changing other important parameters, including duplexer (1), feature exists
In: signal connecting tube (2) are fixedly installed on the right side of the duplexer (1), are fixedly installed in the right end of signal connecting tube (2)
Communication line (3) is fixedly installed with input pipe (4) and efferent duct (5) in the left end of duplexer (1), on a left side for input pipe (4) respectively
Side is connected with fixed bung flange one (7), fixed bung flange two (6) is connected in the left end of efferent duct (5), in duplexer
(1) inside is fixedly installed with receiving cavity (8) and emission cavity (9) respectively, is fixedly installed on the right side of receiving cavity (8)
Communication tube (10) is fixedly installed with receiver (11) in the right end of communication tube (10), passes through communication on the right side of emission cavity (9)
Pipe (10) is fixedly installed with transmitter (12), is fixedly installed with three spools by communication tube (10) in the left side of receiving cavity (8)
(13), it is fixedly connected by communication tube (10) with emission cavity (9) in the bottom of three spools (13), in the left side of three spools (13)
Antenna (14) are fixedly installed with by communication tube (10), capping (17) is fixedly installed in the inside of emission cavity (9), is covering
(17) bottom is fixedly installed with fixed tuning plug (16), and the internal slide in fixed tuning plug (16) is connected with removable tuning
Bar (15) is fixedly installed with shift(ing) ring (18) at the top of removable tuning plug (15), is fixedly mounted at the top of capping (17)
There are radio frequency connector (19), radio-frequency coupling ring (20) is fixedly installed in the bottom of radio frequency connector (19), in radio-frequency coupling ring
(20) it is fixedly installed with conduction pipe (21) on the left of, the capacitor of tunable medium is fixedly installed at the top of conduction pipe (21)
(22), the right side opening in removable tuning plug (15) is equipped with fixed groove (23), is fixedly mounted respectively in the inside of capping (17)
There are guide post (24) and spring (25), is connected with guide sleeve (26) in the slide outside of guide post (24), is fixed in the left side of guide sleeve (26)
Fixed chuck (27) are installed；
Further include radio frequency connecting pin (A), coupling ring two (L2) is electrically connected in the bottom of radio frequency connecting pin (A), in coupling ring
Two (L2) are fixedly connected with variable condenser two (C2) far from the movement of radio frequency connecting pin (A), in variable condenser two (C2)
Output end is connected separately with coupling ring one (L1), variable condenser one (C1), ground wire (GND), coupling ring one (L1) with can power transformation
Container one (C1) is in parallel.
2. the duplexer according to claim 1 that can be tuned in the case where not changing other important parameters,
Be characterized in that: the emission cavity (9) and receiving cavity (8) are respectively uniformly distributed inside that of duplexer (1).
3. the duplexer according to claim 1 that can be tuned in the case where not changing other important parameters,
Be characterized in that: the fixed tuning plug (16) is located at the middle part of emission cavity (9).
4. the duplexer according to claim 1 that can be tuned in the case where not changing other important parameters,
Be characterized in that: all devices of the inside of the emission cavity (9) are all made of silver-plated process.
5. the duplexer according to claim 1 that can be tuned in the case where not changing other important parameters,
Be characterized in that: the emission cavity (9) is made of copper material.
6. the duplexer according to claim 1 that can be tuned in the case where not changing other important parameters,
Be characterized in that: the receiving cavity (8) has with emission cavity (9) identical structure.
7. the duplexer according to claim 1 that can be tuned in the case where not changing other important parameters,
Be characterized in that: the fixed groove (23) is evenly distributed on the right side of removable tuning plug (15), and the knot of fixed chuck (27)
Structure is corresponding with the structure of fixed groove (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910750870.3A CN110444838B (en) | 2019-08-14 | 2019-08-14 | Tunable duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910750870.3A CN110444838B (en) | 2019-08-14 | 2019-08-14 | Tunable duplexer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110444838A true CN110444838A (en) | 2019-11-12 |
| CN110444838B CN110444838B (en) | 2021-04-20 |
Family
ID=68435662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910750870.3A Active CN110444838B (en) | 2019-08-14 | 2019-08-14 | Tunable duplexer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110444838B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0986833B1 (en) * | 1997-06-06 | 2004-12-29 | Allgon Ab | Microwave resonator with dielectric tuning body resiliently secured to a movable rod by spring means |
| WO2006012055A2 (en) * | 2004-06-25 | 2006-02-02 | Microwave Circuits, Inc. | Ceramic loaded temperature compensating tunable cavity filter |
| US20070200648A1 (en) * | 2005-11-09 | 2007-08-30 | Cornell Research Foundation, Inc. | MEMS controlled oscillator |
| CN200965905Y (en) * | 2006-08-11 | 2007-10-24 | 北京麦克斯韦科技有限公司 | Microwave adjustable filter |
| CN102623785A (en) * | 2011-01-28 | 2012-08-01 | 深圳市大富科技股份有限公司 | Dielectric filter, dielectric resonator, cover plate unit and communication equipment |
| CN203134951U (en) * | 2012-11-16 | 2013-08-14 | 深圳市大富科技股份有限公司 | Tunable coupling device and radio frequency communication device |
| CN204216197U (en) * | 2014-12-09 | 2015-03-18 | 中国电子科技集团公司第五十四研究所 | A kind of low frequency high power resonator and electricity adjust band stop filter |
| CN205621823U (en) * | 2015-12-31 | 2016-10-05 | 昆山市双桥铜业有限公司 | Duplexer |
| CN108515537A (en) * | 2018-04-09 | 2018-09-11 | 杭州杭睿科技有限公司 | A kind of lift robot arm |
-
2019
- 2019-08-14 CN CN201910750870.3A patent/CN110444838B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0986833B1 (en) * | 1997-06-06 | 2004-12-29 | Allgon Ab | Microwave resonator with dielectric tuning body resiliently secured to a movable rod by spring means |
| WO2006012055A2 (en) * | 2004-06-25 | 2006-02-02 | Microwave Circuits, Inc. | Ceramic loaded temperature compensating tunable cavity filter |
| US20070200648A1 (en) * | 2005-11-09 | 2007-08-30 | Cornell Research Foundation, Inc. | MEMS controlled oscillator |
| CN200965905Y (en) * | 2006-08-11 | 2007-10-24 | 北京麦克斯韦科技有限公司 | Microwave adjustable filter |
| CN102623785A (en) * | 2011-01-28 | 2012-08-01 | 深圳市大富科技股份有限公司 | Dielectric filter, dielectric resonator, cover plate unit and communication equipment |
| CN203134951U (en) * | 2012-11-16 | 2013-08-14 | 深圳市大富科技股份有限公司 | Tunable coupling device and radio frequency communication device |
| CN204216197U (en) * | 2014-12-09 | 2015-03-18 | 中国电子科技集团公司第五十四研究所 | A kind of low frequency high power resonator and electricity adjust band stop filter |
| CN205621823U (en) * | 2015-12-31 | 2016-10-05 | 昆山市双桥铜业有限公司 | Duplexer |
| CN108515537A (en) * | 2018-04-09 | 2018-09-11 | 杭州杭睿科技有限公司 | A kind of lift robot arm |
Non-Patent Citations (1)
| Title |
|---|
| 杨晶等: "S频段新型同轴双工器设计", 《 2019年全国微波毫米波会议论文集（下册）》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110444838B (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203850408U (en) | H-surface wave separator | |
| CN105375093A (en) | Microstrip power divider with adjustable working frequency | |
| CN105720339A (en) | Dual-band adjustable band-pass filter | |
| CN110931931A (en) | K and Ka dual-band orthogonal mode coupler | |
| CN204271236U (en) | The miniaturized directional coupler of a kind of broadband | |
| CN204375890U (en) | Based on the ultra-broadband dual-frequency band pass filter of dual-mode resonator | |
| CN110444838A (en) | The duplexer that can be tuned in the case where not changing other important parameters | |
| CN203056059U (en) | Radio frequency reconfigurable band-pass filter with wide frequency and wide bandwidth adjusting range | |
| CN203205517U (en) | Fixed directional coupler | |
| CN202275900U (en) | S-band diplexer | |
| CN201466184U (en) | Ku band electric adjustable filter | |
| CN105489989A (en) | High-power waveguide electrically tunable filter | |
| CN203644947U (en) | Short wave tunable magnetic small ring antenna device | |
| CN202058839U (en) | Small-sized double-band band pass filter | |
| CN205212801U (en) | Electrically tunable filter | |
| CN210607560U (en) | Miniaturized high-suppression spiral duplexer | |
| CN202797208U (en) | Filter input and output coupling device with broadband characteristic | |
| CN204991909U (en) | Miniaturized radio frequency identification band pass filter | |
| CN204375955U (en) | The coupled antenna of the acquisition terminal GPRS communication automation system test of a kind of pair of epi-position | |
| CN204558645U (en) | The coupled antenna of the concentrator wireless public network communication automation system test of a kind of pair of epi-position | |
| CN205303634U (en) | High -power waveguide electrically tunable filter | |
| CN107086340B (en) | A kind of tri-band bandpass filter with highly selective pass band tunable | |
| CN103545580A (en) | Miniaturized adjustable band stop filter | |
| CN102324949A (en) | Mobile communication terminal | |
| CN103762402B (en) | A kind of cavity body filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |