CN105428813B - A kind of Pressure Actuated Device and phase shifter - Google Patents
A kind of Pressure Actuated Device and phase shifter Download PDFInfo
- Publication number
- CN105428813B CN105428813B CN201510780085.4A CN201510780085A CN105428813B CN 105428813 B CN105428813 B CN 105428813B CN 201510780085 A CN201510780085 A CN 201510780085A CN 105428813 B CN105428813 B CN 105428813B
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- column
- main part
- actuated device
- pressure
- pressure actuated
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/32—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by mechanical means
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The invention discloses a kind of Pressure Actuated Devices, including at least one pressure piece and at least one rolling member, the rolling member are set on the pressure piece；Wherein, the pressure piece further includes main part and at least one elastic construction, and the elastic construction is set on the main part.The present invention also provides a kind of phase shifter, the Pressure Actuated Device and phase shifter can will not influence the normal work of phase shift wiring board because pressure is excessive when guaranteeing that the gap error of phase shift wiring board and main circuit board is in scope of design.
Description
Technical field
The present invention relates to field of antenna more particularly to a kind of Pressure Actuated Devices and phase shifter.
Background technique
Antenna is the reception of base station and the critical component for emitting signal carrier, directly decides covering and the letter of base station network
Number transmission.With the development of mobile communication system and universal, base station distribution is more and more intensive in city, and communications band is increasingly
More, the problems such as interference between base station, is increasingly severe, and urban high-rise building mansion constantly emerges, and causes the multipath reflection of radio wave
With block, cause the pilot pollution of communication network, area covered, multipath effect to get worse so that mobile communication system for
The requirement of antenna for base station is higher and higher, can be more at present since the continuously adjustable of elevation radiation patytern may be implemented in electrical tilt antenna
Flexibly realize the network coverage, therefore electrical tilt antenna is more widely applied.
The principle of electrical tilt antenna is that the width for changing radiating element in antenna array as desired by phase shifter is mutually distributed, real
Existing antenna beam angle of declination is continuously adjusted.Core component of the phase shifter as electrical tilt antenna, performance directly determine that electricity adjusts day
The performance of line.Mainly have two seed types applied to the phase shifter of electrical tilt antenna at present: one is dielectric phase shifters；Second is object
Manage phase shifter, wherein physics phase shifter is that the physical length for changing transmission line by the sliding of phase shift wiring board realizes phase shift function
Energy.Currently, there are two difficult points for the drive technology of physics phase shifter: first is that how to guarantee the gap of phase shift wiring board and main circuit board
Control errors are within the scope of the coupling amount design requirement of the two；Second is that how to guarantee that the gap of phase shift wiring board and main circuit board is missed
Difference in scope of design caused by frictional force it is not too big, will not influence the normal use problem of phase shifter.And this two o'clock requirement
It is conflicting, if to guarantee tolerance clearance it is necessary to increase pressure, increasing pressure will lead to frictional force increasing；If
Frictional force is reduced it is necessary to reduce pressure, solution this problem that gap error is just difficult to ensure, thus how to be compatible with to Guan Chong
It wants.
Summary of the invention
In view of the above-mentioned problems, can guarantee the purpose of the present invention is to provide a kind of Pressure Actuated Device and phase shifter
When the gap error of phase shift wiring board and main circuit board is in scope of design, phase shift wiring board will not be influenced because frictional force is excessive
Normal use.
The present invention provides a kind of Pressure Actuated Devices, including at least one pressure piece and at least one rolling member, described
Rolling member is set on the pressure piece；Wherein, the pressure piece further includes main part and at least one elastic construction, the bullet
Property structure setting is on the main part.
As an improvement of the above scheme, the elastic construction includes at least one cantilever, and one end of the cantilever is fixed on
On the main part, the other end is hanging.
As an improvement of the above scheme, the hanging other end of the cantilever is provided with bulge-structure.
As an improvement of the above scheme, the pressure piece further includes at least one navigation column and at least one cavity column, institute
Stating main part includes first surface and second surface, and the first surface is fixed in one end of the cavity column, and the other end exposes
The first surface for stating main part, and lumen pore is offered, and the rolling member is placed in the lumen pore；The navigation column
The first surface of the main part is exposed in one end, and the other end exposes the second surface of the main part
As an improvement of the above scheme, the elastic construction includes at least one elastomer, and the elastomer is placed in institute
It states in lumen pore, the rolling member is placed on the elastomer.
As an improvement of the above scheme, the pressure piece further includes the first fool proof column and the second fool proof column, and described first is anti-
Slow-witted column is set to the first surface of the main part, and the second fool proof column is set to the second surface of the main part.
As an improvement of the above scheme, the Pressure Actuated Device further includes pull rod, and at least one is provided on the pull rod
Group pilot hole corresponding with the pressure piece, wherein pilot hole described in every group includes at least one navigation hole, the navigation column
One end passes through the navigation hole.
As an improvement of the above scheme, the pressure piece further includes at least one barb, and the barb is set to the master
The first surface in body portion, pilot hole described in every group further include at least one card slot, and the card slot is opened in the side wall of the pull rod,
The barb is fastened on the card slot.
As an improvement of the above scheme, the pressure piece further includes the first fool proof column, and the first fool proof column is set to institute
The first surface of main part is stated, pilot hole described in every group further includes a fool proof hole, and first fool proof hole is opened in the drawing
On bar, in the first fool proof column insertion first fool proof hole.
The present invention also provides a kind of phase shifters, including top plate, main circuit board, phase shift wiring board, bottom plate and above-mentioned pressure
Transmission device, the Pressure Actuated Device are set between the top plate and the phase shift wiring board, the main circuit board setting
Between the phase shift wiring board and the bottom plate, wherein offer mounting hole, the main circuit board on the phase shift wiring board
On offer sliding slot, one end of the pressure piece passes through the mounting hole of the phase shift wiring board, and is set to the main circuit board
Sliding slot in.
Pressure Actuated Device and phase shifter provided in an embodiment of the present invention, by the way that the rolling is arranged on the pressure piece
Part, so that the frictional force between the Pressure Actuated Device and the top plate becomes the rolling friction that friction is small, in addition, also
By the way that elastic construction is arranged on the pressure piece, to adjust the phase shift wiring board and the main line by the elastic construction
The distance between road plate, thus guaranteeing the gap error control between phase shift wiring board and main circuit board in the coupling amount of the two
While within the scope of design requirement, guarantees that the frictional force of phase shift wiring board and top plate is not too big, will not influence phase shift wiring board
Normal use.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the decomposition diagram of phase shifter provided in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram of Pressure Actuated Device provided in an embodiment of the present invention.
Fig. 3 is the structural schematic diagram of pressure piece shown in Fig. 2.
Fig. 4 is the structural schematic diagram of pressure piece shown in Fig. 2.
Fig. 5 is the structural schematic diagram of phase shifter provided in an embodiment of the present invention.
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.
Referring to Fig. 1, the present invention provides a kind of phase shifter 1000, the phase shifter 1000 includes top plate 100, pressure actuation
Device 200, at least one phase shift wiring board 300, main circuit board 400 and bottom plate 500, wherein the Pressure Actuated Device 200 is set
It is placed between the top plate 100 and the phase shift wiring board 300, the main circuit board 400 is set to the phase shift wiring board 300
Between the bottom plate 500.The phase shift wiring board 300 is fixed on the Pressure Actuated Device 200, and can be in the pressure
It is mobile relative to the main circuit board 400 under the drive of transmission device 200.
In embodiments of the present invention, the top plate 100 can be in long slab shape, and it is sliding that several top plates are offered on the top plate 100
Slot 110 (sliding slot of the i.e. described top plate 100), the roof chute 110 are substantially in long hole shape, and the roof chute 110 is for keeping away
Open tracks of the Pressure Actuated Device 200 in sliding.
Please refer to figs. 2 and 3 together, and in embodiments of the present invention, the Pressure Actuated Device 200 includes at least one pressure
Power part 210 and at least one rolling member 215, the rolling member 215 are placed on the pressure piece 210.
In embodiments of the present invention, the pressure piece 210 includes main part 211, elastic construction 212, at least one navigation
Column 213 and at least one cavity column 214, the elastic construction 212 are set on the main part 211, and the main part 211 wraps
Include first surface and second surface, the navigation column 213 and cavity column 214 is vertical is fixed on the main part 211,
One end of the cavity column 214 is fixed on the first surface, and the first surface of main part 211 is stated described in other end exposing,
The first surface of the main part 211 is exposed in one end of the navigation column 213, and the other end exposes the second of the main part 211
Surface.
Specifically, as the preferred embodiment of the present invention, the pressure piece 210 includes 211, two navigation columns of main part
213 and four cavity columns 214, and the elastic construction 212 includes 4 cantilevers.Wherein, the main part 211 is substantially in bulk,
Respectively on vertical four angles for being fixed on the main part 211, one end of the cavity column 214 is set four cavity columns 214
It is placed on the first surface, the other end is open lumen pore, and the rolling member 215 may be disposed in the lumen pore.Described
Two navigation columns 213 are located on the side of 211 opposite sides of main part, which can be in cylindrical shape, and described lead
The both ends of boat column 213 are all exposed the surface of the main part 211, i.e., the first surface is exposed in one end of the described navigation column 213,
The other end exposes the second surface.Wherein, the other end of the navigation column 213 is additionally provided with coupler body 2131, the coupler body
2131 can be inserted into the phase shift wiring board 300 in the navigation column 213, block the phase shift wiring board 300, prevent the shifting
Phase line plate 300 falls off from the navigation column 213.
In embodiments of the present invention, 4 cantilevers are set to the two sides of the main part 211, and symmetrical, example
Such as, two cantilevers can be respectively set in the two sides of the main part 211, wherein described cantilever one end is fixed on the main part 211
On, the other end is then hanging, and is provided with bulge-structure 2121 on the hanging end, described in the height protrusion of the bulge-structure 2121
The second surface of main part 211.
Referring to Figure 4 together, it should be noted that in embodiments of the present invention, the center of the main part 211 is also
Aperture 216 is offered, may also set up a cantilever in the aperture 216, likewise, one end of the cantilever is fixed, it is another
End is hanging and has bulge-structure.
It should be noted that in other embodiments of the invention, the elastic construction 212 can also be elastomer, described
Elastomer can be sponge or spring etc., which is set in the lumen pore of the opening of the cavity column 214, the rolling member
215 are set on the elastic construction 212, and when the rolling member 215 is pressed, the rolling member 215 is moved along pressing direction
Dynamic, deformation occurs for the elastic construction 212, has restoring force, and when the pressing disappears, the rolling member 215 is driven to return
Return to original position.
It should be noted that the Pressure Actuated Device 200 may also include a pull rod 220 in the embodiment of the present invention, use
In fixation pressure part 210, the pressure piece 210 further includes two barbs 217, and two barbs 217 are set to the master
The two sides of the aperture 216 in body portion 211, for 210 entirety of pressure piece to be fastened on the pull rod 220.Certainly, it should
Understand, in some embodiment of the invention, the pull rod 220 can also not needed, and directly by by multiple pressure pieces 210
Combination forms an entirety, and the rolling member 215 is placed in the lumen pore, to form the Pressure Actuated Device 200, this
A little design schemes are also within protection scope of the present invention.
It should be noted that in the embodiment of the present invention, the pressure piece 210 further includes the first fool proof column 218, described first
Fool proof column 218 is set on the first surface of the main part 211, for guaranteeing that the pressure piece 210 will not be reversibly mounted on
On the pull rod 220.
It should be noted that in the embodiment of the present invention, the pressure piece 210 further includes the second fool proof column 219, described second
Fool proof column 219 is set on the second surface of the main part 211, for guaranteeing that the phase shift wiring board 300 will not reversely pacify
On the pull rod 220.
Referring to Fig. 2, in embodiments of the present invention, the whole pull rod 220 is in a strip, wrapped on the pull rod 220
Include at least one set of pilot hole corresponding with the pressure piece 210, wherein the pilot hole includes at least one navigation hole 221, institute
The navigation column 213 for stating pressure piece 210 may pass through the navigation hole 221.
Specifically, as the preferred embodiment of the present invention, one group of pilot hole includes two navigation holes 221, described
Two navigation columns 213 in two navigation holes 221 and the pressure piece 210 correspond, one end of described two navigation columns 213
It is each passed through the navigation hole 221, so that the pressure piece 210 is fixed on the pull rod 220.
It should be noted that in embodiments of the present invention, one group of pilot hole further includes the first fool proof hole 222, institute
Stating the first fool proof hole 222 may be disposed between described two navigation holes 221, and the pressure piece 220 is installed on the pull rod 220
When, the first fool proof column 218 may pass through first fool proof hole 222 on the pull rod 220, thus anti-by described first
The cooperation of slow-witted column 218 and first fool proof hole 222, realizes the pressure piece 210 and is correctly installed in the pull rod 220
On, the case where without reversely installing.
It should be noted that in embodiments of the present invention, one group of pilot hole further includes two card slots 223, described
Two card slots 223 be symmetrically opened in the two sides of the pull rod 220, when the pressure piece 210 is mounted on the pull rod 220,
Two barbs 217 of the pressure piece 210 are just fastened on the card slot 223, to guarantee that the pressure piece 210 will not be from
It falls off on the pull rod 220.
In embodiments of the present invention, the rolling member 215 can be ball or other objects with roll capability, number
Amount is equal to the quantity of the cavity column 214, and is respectively placed in the other end of four cavity columns 214, i.e., the described lumen pore
On place a rolling member 215.Wherein, the lumen pore is that an interior spatial altitude is smaller than 215 diameter of rolling member, interior table
The smooth lumen pore in face, thus the rolling member 215 can expose the borehole surface, and since the lumen pore inner surface is smooth,
The rolling member 215 has lesser frictional force in rotation.
In embodiments of the present invention, mounting hole 310 there are two being opened up on the phase shift wiring board 300, the phase shift route
Plate 300 may be mounted on the Pressure Actuated Device 200.Two mounting holes 310 of the phase shift wiring board 300 correspond respectively to
The other end of two navigation columns 213 of the pressure piece 210, the navigation column 213 may pass through the mounting hole 310, described to lead
Coupler body 2131 on boat column 213 blocks the phase shift wiring board 300, prevents the phase shift wiring board 300 from the pressure piece 210
On fall off, thus by 300 integral installation of phase shift wiring board on the Pressure Actuated Device 200.
It should be noted that in embodiments of the present invention, the phase shift wiring board 300 further includes the second fool proof hole 320, institute
It states the second fool proof hole 320 to be set between two mounting holes 310, the phase shift wiring board 300 is installed to the pressure
When on transmission device 200, the second fool proof column 219 passes through second fool proof hole 320, to pass through the second fool proof column
219 and second fool proof hole 320 cooperation, realize the phase shift wiring board 300 and be correctly installed in the pull rod 220
On, the case where without reversely installing.
It should be noted that in embodiments of the present invention, the number of the phase shift wiring board 300 can be one or more,
Wherein, the corresponding pressure piece 210 of each phase shift wiring board 300.
In embodiments of the present invention, the main circuit board 400 can be sticked on the phase shift wiring board 300, the main line
Road plate 400 has mainboard sliding slot 410 (i.e. the sliding slot of main circuit board 400), wherein the mainboard sliding slot 410 is in long hole shape, length
Degree can be set as needed, and the navigation column 213 can move freely in the mainboard sliding slot 410.
In embodiments of the present invention, the main circuit board 400 can be sticked and be fixed on the bottom plate 500, the bottom plate 500
With floor chute 510 (i.e. the sliding slot of bottom plate 500), wherein the floor chute 510 is in long hole shape, and length can be according to need
It is set, the floor chute 510 is used to avoid the navigation column 213 in the tracks of the mainboard sliding slot 410, prevents
Only the navigation column 213 touches the bottom plate 500 in sliding process.
Please refer to fig. 5, in embodiments of the present invention, when installation, successively by the top plate 100, Pressure Actuated Device
200, phase shift wiring board 300, main circuit board 400 and bottom plate 500 are assembled as described above, and utilize a stud 600 by institute
Top plate 100 and the bottom plate 500 are stated, to form a movable space between the top plate 100 and the bottom plate 500, this
When, it can be by pulling the pull rod 220 to drive the phase shift wiring board 300 mobile, so that changing transmission line (is set to phase-shift line
On road plate 300) physical length, to realize phase modulation function.When the top plate 100 pushes down the Pressure Actuated Device 200, generate
Pressure make the pressure piece 210 elastic construction 212 generate deformation, the bullet that the elastic construction 212 is generated due to deformation
Power pushes the phase shift wiring board 300 to the main circuit board 400, and then the phase shift wiring board 300 is close to the main line
Plate 400, so that the phase shift wiring board 300 is when mobile relative to the main circuit board 400, the tolerance of their distance in permission
Within the scope of while, pressure between the two is not too big.Further, since the phase shift wiring board 300 is to pass through rolling member
Both 215 generate with the top plate 100 and contacts, i.e., when relatively moving, the frictional force between them is rolling
Frictional force, thus even if when the pressure is larger, it is also ensured that there is lesser frictional force in the process of moving.
In conclusion phase shifter 1000 provided in an embodiment of the present invention, by being arranged on the Pressure Actuated Device 200
The rolling member 215, so that the frictional force between the Pressure Actuated Device 200 and the top plate 100 becomes, friction is small
Rolling friction, in addition, also by the pressure piece of the Pressure Actuated Device 200 be arranged elastic construction 212, to pass through bullet
Property structure 212 adjust the pressure between the phase shift wiring board 300 and the main circuit board 400, thus guarantee phase shift route
While gap error between plate 300 and main circuit board 400 is controlled within the scope of the coupling amount design requirement of the two, guarantee to move
Phase line plate 300 and the frictional force of top plate 100 are not too big, will not influence the normal use of phase shift phase shifter.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Claims (9)
1. a kind of Pressure Actuated Device, which is characterized in that including at least one pressure piece and at least one rolling member, the rolling
Part is set on the pressure piece；Wherein, the pressure piece further includes main part and at least one elastic construction, the elasticity knot
Structure is set on the main part；The pressure piece further includes at least one navigation column and at least one cavity column, the main body
Portion includes first surface and second surface, the navigation column and cavity column is vertical is fixed on the main part；It is described
The first surface is fixed in one end of cavity column, states the first surface of main part described in other end exposing, and offer lumen pore,
And the rolling member is placed in the lumen pore；Expose the first surface of the main part, the other end in one end of the navigation column
Expose the second surface of the main part.
2. Pressure Actuated Device according to claim 1, which is characterized in that the elastic construction includes that at least one is outstanding
Arm, one end of the cantilever are fixed on the main part, and the other end is hanging.
3. Pressure Actuated Device according to claim 2, which is characterized in that the hanging other end of the cantilever is provided with convex
Play structure.
4. Pressure Actuated Device according to claim 1, which is characterized in that the elastic construction includes at least one elasticity
Body, the elastomer are placed in the lumen pore, and the rolling member is placed on the elastomer.
5. Pressure Actuated Device according to claim 1, which is characterized in that the pressure piece further include the first fool proof column and
Second fool proof column, the first fool proof column are set to the first surface of the main part, and the second fool proof column is set to described
The second surface of main part.
6. Pressure Actuated Device according to claim 5, which is characterized in that the Pressure Actuated Device further includes pull rod,
At least one set of pilot hole corresponding with the pressure piece is provided on the pull rod, wherein pilot hole described in every group includes at least
One end of one navigation hole, the navigation column passes through the navigation hole.
7. Pressure Actuated Device according to claim 6, which is characterized in that the pressure piece further includes that at least one falls
Hook, the barb are set to the first surface of the main part, and pilot hole described in every group further includes at least one card slot, the card
Slot is opened in the side wall of the pull rod, and the barb is fastened on the card slot.
8. Pressure Actuated Device according to claim 6, which is characterized in that pilot hole described in every group further includes a fool proof
Hole, first fool proof hole are opened on the pull rod, in the first fool proof column insertion first fool proof hole.
9. a kind of phase shifter, which is characterized in that including top plate, main circuit board, phase shift wiring board, bottom plate and such as claim 1 to 8
Pressure Actuated Device described in any one, the Pressure Actuated Device be set to the top plate and the phase shift wiring board it
Between, the main circuit board is set between the phase shift wiring board and the bottom plate, wherein is offered on the phase shift wiring board
Mounting hole offers sliding slot on the main circuit board, and one end of the pressure piece passes through the mounting hole of the phase shift wiring board, and
It is set in the sliding slot of the main circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510780085.4A CN105428813B (en) | 2015-11-13 | 2015-11-13 | A kind of Pressure Actuated Device and phase shifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510780085.4A CN105428813B (en) | 2015-11-13 | 2015-11-13 | A kind of Pressure Actuated Device and phase shifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105428813A CN105428813A (en) | 2016-03-23 |
| CN105428813B true CN105428813B (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510780085.4A Active CN105428813B (en) | 2015-11-13 | 2015-11-13 | A kind of Pressure Actuated Device and phase shifter |
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| CN (1) | CN105428813B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201430200Y (en) * | 2008-12-24 | 2010-03-24 | 广东通宇通讯设备有限公司 | Equiphase differential multiplexed phase shifter |
| CN102460824A (en) * | 2009-05-11 | 2012-05-16 | 株式会社Kmw | Multi-line phase shifter for vertical beam tilt-controlled antenna |
| CN202917611U (en) * | 2012-11-12 | 2013-05-01 | 江苏亨鑫科技有限公司 | Low frequency phase shifter |
| EP2761696A1 (en) * | 2011-09-29 | 2014-08-06 | Andrew LLC | Microstrip to airstrip transition with low passive inter-modulation |
| CN205282653U (en) * | 2015-11-13 | 2016-06-01 | 广州杰赛科技股份有限公司 | Pressure transmission and move looks ware |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6831602B2 (en) * | 2001-05-23 | 2004-12-14 | Etenna Corporation | Low cost trombone line beamformer |
-
2015
- 2015-11-13 CN CN201510780085.4A patent/CN105428813B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201430200Y (en) * | 2008-12-24 | 2010-03-24 | 广东通宇通讯设备有限公司 | Equiphase differential multiplexed phase shifter |
| CN102460824A (en) * | 2009-05-11 | 2012-05-16 | 株式会社Kmw | Multi-line phase shifter for vertical beam tilt-controlled antenna |
| EP2761696A1 (en) * | 2011-09-29 | 2014-08-06 | Andrew LLC | Microstrip to airstrip transition with low passive inter-modulation |
| CN202917611U (en) * | 2012-11-12 | 2013-05-01 | 江苏亨鑫科技有限公司 | Low frequency phase shifter |
| CN205282653U (en) * | 2015-11-13 | 2016-06-01 | 广州杰赛科技股份有限公司 | Pressure transmission and move looks ware |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105428813A (en) | 2016-03-23 |
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