CN1284797A - Signal processing equipment for phase-shifting and attenuating input signal - Google Patents
Signal processing equipment for phase-shifting and attenuating input signal Download PDFInfo
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- CN1284797A CN1284797A CN00128993A CN00128993A CN1284797A CN 1284797 A CN1284797 A CN 1284797A CN 00128993 A CN00128993 A CN 00128993A CN 00128993 A CN00128993 A CN 00128993A CN 1284797 A CN1284797 A CN 1284797A
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Abstract
A signal-processing apparatus is capable of stably operating without regard to outside circumstances and miniaturizing. The signal-processing apparatus for shifting phase of a signal inputted thereto and attenuating the signal includes an input connector for inputting a signal; an output connector for outputting the signal; a rotation body to be rotated by the rotational force provided from the rotational force supplying means; a plurality of rotatable members respectively having a groove in peripheral portion, the rotatable members being coupled to peripheral portion of the rotation body so that the grooves communicate with each other; and a signal transmitting member for transmitting the inputted signal to the output connector, the signal transmitting member being located in the grooves and its both ends being respectively connected to the input and output connectors.
Description
The present invention relates to be used for signal handling equipment that the signal of being imported is carried out phase shift and signal is decayed, and relate more specifically to the signal handling equipment that no matter why can both stably operate and carry out miniaturization such as the external environment condition of temperature etc.
Usually, communication system needs signal handling equipment, such as being used for the signal of being imported is carried out the phase shifter of phase shift and is used for attenuator that signal is decayed or the like.
Referring to Figure 1A and 1B, wherein show and be used for traditional signal handling equipment that the signal of being imported is carried out phase shift and signal is decayed.
Shown in Figure 1A, conductor 4, the removable handle 6 that is connected to the insulating material 5 of conductor 4 and is attached to the opposite side of shell 3 rotationally that this classical signal treatment facility comprises hollow casing 3, be attached to the input and output connector 1 and 2 of these shell 3 one sides, have the input of being connected respectively to and the W shape of two ends of out connector 1 and 2.Handle 6 is used for providing locomotivity to insulating material 5.
Through input connector 1 when signal is inputed to an end of conductor 4, shown in the arrow among Figure 1A, signal is through out connector 2 outputs of insulating material 5 from the other end that is connected to conductor 4.In this case, the total length of arrow represents to be used to transmit the input signals Route Length.
This classical signal treatment facility plays phase shifter.That is, when swing handle 6 and then move left and right conductor 4, therefore the total length that changes transmission line has also moved phase of input signals and has postponed the transmission time of this signal.
Also have, in this classical signal treatment facility, when utilizing the absorber 50 shown in Figure 1B to substitute insulating material, this legacy equipment plays attenuator.That is, absorber 50 decay are by the radio wave of conductor 4.
Yet, in above-mentioned normal signal treatment facility, because shell has the space of the mobile insulating material of energy, so exist the problem that is difficult to this signal handling equipment of miniaturization.
In order to overcome this problem, another classical signal treatment facility has the electric device such as diode, as the transmission line of the signal that inputs to input connector.
Yet, owing to can damage this device during to this electric device in high electrical power flow, so this electric device is difficult to communication system.
Also have, because this electrical equipment is responsive to the external environment condition reaction such as temperature, so there is the communication system problem of unstable.
Therefore, the purpose of this invention is to provide a kind of signal handling equipment that can solve prior art problems.
According to an aspect of the present invention, provide a kind of signal handling equipment, be used for the signal of being imported is carried out phase shift and signal is decayed, comprising: input connector is used for input signal; Out connector is used for output signal; The rotatory force generator is used to provide rotatory force; Rotor is subjected to the rotatory force that the rotatory force generator provides and rotates; A plurality of rotatable components have groove respectively in periphery, these rotatable components are attached on the periphery of described rotor, make described groove communicate with each other; And signal transmission component, being used for the signal of input is transferred to out connector, signal transmission component is arranged in described groove and its two ends link to each other with described input, out connector respectively.
According to a further aspect in the invention, provide a kind of signal handling equipment, be used for the signal of being imported is carried out phase shift and signal is decayed, comprising: input connector is used for input signal; Out connector is used for output signal; The rotatory force that rotor, the power generator of being rotated provide is rotated, and described rotor has annular opening in its underpart and it is made by conductor; A plurality of rotatable components have groove in the bottom respectively, and these rotatable components are attached to the periphery of described rotor, make described groove communicate with each other; And signal transmission component, have the terminal that is connected respectively to described input, out connector, thereby the signal that will be input to described input connector being transferred to described out connector, described signal transmission component is arranged in described groove.
According to another aspect of the invention, provide a kind of signal handling equipment, be used for the signal of being imported is carried out phase shift and signal is decayed, comprising: input connector is used for input signal; Out connector is used for output signal; First rotor, the power that is rotated is rotated, and described first rotor has first of being connected to described rotatory force generator and is attached to described first periphery, first dish to move with described first; First parts, the periphery that is attached to first is so that with described first motion; Second parts relatively are attached to first periphery with described first parts, with described first motion; And signal transmission component, being used for the signal through the input connector input is transferred to out connector, described signal transmission component is positioned at first and second parts below and its two ends link to each other with described input, out connector respectively.
By the description of the preferred embodiment that provides below in conjunction with accompanying drawing, above-mentioned and other purpose of the present invention and feature will become obvious, wherein:
Figure 1A and 1B are the sectional views that classical signal treatment facility structure is shown;
Fig. 2 is the perspective view that schematically illustrates according to first embodiment of signal handling equipment of the present invention, and wherein some is cut, and described equipment is used for the signal of being imported is carried out phase shift and signal is decayed;
Fig. 3 is the decomposition diagram that specifically illustrates Fig. 2 part;
Fig. 4 is the sectional view of Fig. 2;
Fig. 5 A-5C is the perspective view of various remodeling that the equipment of the Fig. 2 that is applicable to printed circuit board is shown;
Fig. 6 is the plane graph that another remodeling of Fig. 2 is shown;
Fig. 7 illustrates the motor of the outer conductor of the signal handling equipment that is used to rotate Fig. 2;
Fig. 8 is the perspective view that schematically illustrates according to second embodiment of signal handling equipment of the present invention, and described equipment is used for the signal of being imported is carried out phase shift and signal is decayed;
Fig. 9 is the sectional view of Fig. 8;
Figure 10 schematically illustrates to be used for according to the present invention input signal is carried out phase shift and the perspective view of the 3rd embodiment of signal handling equipment that signal is decayed;
Figure 11 is the sectional view of Figure 10;
Figure 12 is the perspective view that schematically illustrates according to the 4th embodiment of signal handling equipment of the present invention, and described equipment is used for the signal of being imported is carried out phase shift and signal is decayed;
Figure 13 is the sectional view that the confined state of a fourth embodiment in accordance with the invention is shown;
Figure 14 is the perspective view that schematically illustrates according to the 5th embodiment of signal handling equipment of the present invention, and described equipment is used for the signal of being imported is carried out phase shift and signal is decayed;
Figure 15 is the sectional view that illustrates according to the confined state of fifth embodiment of the invention.
Below, 2-15 specifically describes each embodiment according to signal handling equipment of the present invention with reference to the accompanying drawings.
As Fig. 2-4, show signal handling equipment according to the first embodiment of the present invention.
According to the signal handling equipment of first embodiment of the invention comprise shell 110 (referring to Fig. 4), rotationally be combined in outer conductor 120 in the shell 110, be combined in the outer conductor 12 so as therewith first parts 132 and second parts 134, the input connector 140 that is attached to shell 110 1 sides that rotate together of outer conductor 120, be attached to shell a side opposite with input connector 140 on out connector 150 and be positioned at the inner wire 160 of first parts 132 and second parts 134.The two ends of inner wire 160 are connected respectively to input conductor 140 and output conductor 150 so that fixed-site.
In this embodiment, outer conductor 120 comprises the axle 122 on the top of passing shell 110 and is positioned at first dish, 124 and second dish 126 on the periphery of axle 122.First dish, 124 and second dish 126 separates predetermined distance on the top of axle 122 and bottom, so first parts 132 and second parts 134 are installed between it.Preferably, axle 122 top has recess 122a and connects the motor (not shown) that is used to provide rotatory force.In this case, axle 122 is perpendicular to first dish, 124 and second dish 126.Axle 122, first dish 124 and second dish 126 (that is, outer conductor 120) form.
Also have, first parts 132 and second parts 134 have the first groove 132a and the second groove 134a respectively, and inner wire 160 just is combined in wherein.The height of the second groove 134a is higher than the height of the first groove 132a.When being assembled to first parts 132 and second parts 134 on the outer conductor 120, the first groove 132a and the second groove 134a communicate with each other.Inner wire 160 has the curvature that is substantially equal to the first groove 132a and the second groove 134a.
In first embodiment that constructs as mentioned above, if first parts 132 are made of first and second insulating material that has different mutually dielectric constants respectively with second parts 134, this signal handling equipment plays a part phase shifter.That is, when rotation axis 122, first insulating material 132 and second insulating material 134 and first dish, 124, second dish 126 rotate together, and inner wire 160 keeps its home position.In this case, the dielectric constant around the inner wire 160 changes continuously owing to the rotation of axle 122.Therefore, when the signal that inputs to input connector 140 sends to out connector 150 by inner wire 160, the phase shifts of this signal, so that postpone the transmission time of this signal.For example, when the dielectric constant of first insulating material 132 is positioned at the first groove 132a greater than the dielectric constant of second insulating material 134 and whole inner wire 160, all has phase shift and time of delay maximum.On the contrary, when whole inner wire 160 is positioned at the second groove 134a that has than low-k, all has phase shift and time of delay minimum value.
Also have, when inner wire 160 is on first insulating material 132 and second insulating material 134, all have phase shift and time of delay a value that is between maximum and the minimum value.
On the other hand, if first parts 132 and second parts 134 are made of first absorber and second absorber (that is, ferrite (ferrite)) of energy radio wave absorbing respectively, the signal handling equipment of first embodiment plays a part attenuator.That is, when the signal that inputs to input connector 140 passed through inner wire 160, this signal was decayed by absorber and output from out connector 150 subsequently
Referring to Fig. 5 A-5C, expression is applicable to the perspective view of various remodeling of first embodiment of printed circuit board.
Referring to Fig. 5 A, removed input and out connector, and printed circuit board (below be called PCB) is directly linked at the two ends of inner wire 160 respectively.
Referring to Fig. 5 B, the two ends of inner wire 160 bend once so that be fixed on the PCB.
Referring to Fig. 5 C, the two ends of inner wire 160 bend several times so that directly be fixed on the PCB.
Referring to Fig. 6, the plane graph of expression according to another execution mode of first embodiment of the invention is shown.
Referring to Fig. 6, the attenuator " B " that the phase shifter " A " that this signal handling equipment is made of the insulating material that has mutually different dielectric constants respectively its first, second parts and its first, second parts are made of absorber is formed.In this case, an end of the inner wire 160 of phase shifter " A " is linked an end of the inner wire 160 of attenuator " B ".Also have, the other end of the inner wire 160 of phase shifter " A " is linked input connector 140, and the other end of the inner wire 160 of attenuator " B " is linked out connector 150.Subsequently, this signal handling equipment can be carried out the function of phase shifter and attenuator simultaneously.
Referring to Fig. 7, the driving shaft of motor 170 is fixed to the recess 122a of axle 122.In this case, the rotation that comes Control Shaft 122 by the operation of controlling motor 170.Can carry out remote control to motor 170.
Referring to Fig. 8 and 9, second embodiment according to signal handling equipment of the present invention is shown.
Signal handling equipment referring to Fig. 8 and 9, the second embodiment comprises the outer conductor 220 that is combined in the shell 210.This conductor 220 comprises: have the projection 222 of the recess 222a that is used for installing at an upper portion thereof motor driving shaft and be used for installing in its underpart the annular opening of first parts 232 and second parts 234.In this case, first parts 232 and second parts 234 have the first groove 232a and the second groove 234a that inner wire 160 wherein is installed respectively.The first groove 232a is connected with the second groove 234a, and the size of the first groove 232a is greater than the size of the second groove 234a.The cross section of inner wire 260 roughly has semicircular arc.Inner wire 260 has the pair of terminal that is formed on its lower end and passes shell 210.These terminals are connected with out connector 250 with the input connector 240 that is attached to shell 210 bottoms respectively.Therefore, inner wire 260 always keeps its home position.Import parallel with 250 with projection 222 with out connector 240.
In second embodiment that constructs as mentioned above, if first parts 232 are made up of mutual first and second the different insulating material of dielectric constant respectively with second parts 234, this signal handling equipment plays a part phase shifter.Also have, if first parts 232 and second parts 234 are made up of first, second absorber (that is, ferrite) of energy radio wave absorbing respectively, the signal handling equipment of first embodiment then plays attenuator.Because the class of operation of the signal handling equipment among second embodiment is similar to the operation of first embodiment, describe so will omit the operation of second embodiment.
Referring to Figure 10 and 11, the 3rd embodiment according to signal handling equipment of the present invention is shown.
Shown in Figure 10 and 11, the signal handling equipment of the 3rd embodiment comprises shell 310, have the top that shell 310 from then on protrudes axle 320, be fixed to first parts 332 on the periphery of axle 320 with second parts 334, be attached to the input connector 340 and the out connector 350 of shell 310 both sides and be positioned at the inner wire 360 of first parts 332 and second parts 334 respectively.Axle 320 has the recess 322 that the is formed on top driving shaft with fixed electrical machinery, and first parts 332 and second parts 334 respectively adopt semi-circular shape, and have the first groove 332a and the second groove 334a that forms on its periphery respectively.Inner wire 360 adopts the roughly shape of semicircular arc.
In this embodiment, first parts 332 and second parts 334 are fixed on the axle 322, so that the first groove 332a is connected with the second groove 334a.
In the 3rd embodiment that constructs as mentioned above, if first parts 332 are made up of the first and second different mutually insulating material of dielectric constant respectively with second parts 334, this signal handling equipment plays phase shifter.Also have, if first parts 332 and second parts 334 are made up of first and second absorber (that is, ferrite) of energy radio wave absorbing respectively, the signal handling equipment of this 3rd embodiment plays attenuator.Because the class of operation of the signal handling equipment among the 3rd embodiment is similar to the operation of first embodiment, describe so will omit the operation of the 3rd embodiment.
Referring to Figure 12 and 13, the 4th embodiment according to signal handling equipment of the present invention is shown.
Shown in Figure 12 and 13, the signal handling equipment of the 4th embodiment comprises shell 410 and the outer conductor 420 that is combined in the shell 410.Shell 410 is included in the lid 414 that top has the box body 412 of opening and is used to close the opening of box body 412.Box body 412 has pair of notches part that forms on its two top and the recess 413 that forms on its basal surface.Lid 414 has a pair of projection inserted respectively in the notch portion and the through hole 415 that forms on the part relative with recess 413.When the opening of lid 414 closed box 412, form predetermined space in each notch portion of box body 412 with covering between each projection of 414 respectively.
The signal handling equipment of this embodiment also has first parts 432 that are attached to axle 422 periphery respectively and second parts 434 and printed circuit board (below be called PCB) 440, and it has through hole 442, is used to make axle 422 by its core.First parts 432 adopt semi-circular shape and have different thickness mutually respectively with second parts 434.PCB 440 has the transmission line 444 with the roughly semicircular arc shape of electric conducting material coating.Except that transmission line 444, the remainder of PCB 440 preferably is made of non-conducting material.Protrude the space that the two ends of this transmission line 444 form between each jut of each notch portion of described box body 412 and lid 414 respectively.In this case, the two ends of transmission line 444 are connected respectively to input connector 450 and the out connector 460 that is combined in shell 410 both sides.
In the 4th embodiment that constructs as mentioned above, if first parts 432 and second parts 434 are made up of mutually different first and second insulating material of dielectric constant respectively, the signal handling equipment of this 4th embodiment plays phase shifter.Also have, if first parts 432 and second parts 434 are made up of first and second absorber (that is, ferrite) of energy radio wave absorbing respectively, the signal handling equipment of this 4th embodiment plays attenuator.Because the class of operation of the signal handling equipment among the 4th embodiment is similar to the operation of first embodiment, describe so will omit the operation of the 4th embodiment.
Referring to Figure 14 and 15, the 5th embodiment according to signal handling equipment of the present invention is shown.
Shown in Figure 14 and 15, the signal handling equipment of the 5th embodiment comprises shell 510 and first and second outer conductor 520 and 530 that is combined in the shell 510, and described shell 510 has box body and the box body 512 of lid and the shell 510 of lid 514 that is similar to respectively among the 4th embodiment.
First outer conductor 520 has first 522 of being connected to the motor (not shown) and is connected to first dish 524 of first 522 periphery.Second conductor 530 has second 532 of being connected to first 522 and is attached to second dish 534 on second 532 the periphery.Preferably, first conductor 520 and second conductor 530 all are integrally formed.In this case, comprise that the recess 522a that is used for installing at an upper portion thereof motor driving shaft and being used to is connected first vertical hole of the screw 536 of its underpart for first 522.Second 532 bottom is attached to the recess 513 of box body 512 rotationally and has the second vertical hole 532a that is used for attachment screw 536.The screw 536 that first and second 522 and 532 utilization is connected in first vertical hole through second vertical hole 532 combines.The head that preferably can hold in this case, screw 536 for the shape of the bottom of head contact shell 510, the second vertical hole 532a of preventing screw 536.
The signal handling equipment of the 5th embodiment has first parts 542 and second parts 544 of the periphery that is attached to first 522 and is attached to the 3rd parts 546 and the 4th parts 548 of second 532 periphery.First to fourth parts 542-548 has the cross section of semi-circular shape.First parts 542, second parts 544 and the 3rd parts 546, the 4th parts 548 are spaced a predetermined distance from.In this case, the signal handling equipment of the 5th embodiment also has the printed circuit board that combines (below be called PCB) 550 in being incorporated into first 522 parts and the space that is incorporated between second 532 the parts.PCB 550 has the through hole 552 that is used for by axle.First parts 542, the 3rd parts 546 have respectively and second parts 544, the different thickness of the 4th parts 548.Therefore, the interval between the first and the 3rd parts 542 and 546 is greater than the interval between second parts 544, the 4th parts 548.
Have transmission line 554 on the PCB 550, and except that transmission line 554, the remainder of PCB 550 applies with non-conducting material with the electric conducting material coating.Transmission line 554 is so that roughly protrude from the both sides of shell 510 respectively at shape formation and its two ends of semicircular arc.The two ends of transmission line 554 are connected respectively on input connector 560 and the out connector 570.
In the 5th embodiment that constructs as mentioned above, if first to fourth parts 542-548 is made of the mutual different insulating material of dielectric constant respectively, this signal handling equipment plays phase shifter.And if first to fourth parts 542-548 is made of the absorber (that is, ferrite) of energy radio wave absorbing respectively, the signal handling equipment of this 5th embodiment plays attenuator.Because the class of operation of the signal handling equipment among the 5th embodiment is similar to the operation of first embodiment, describe so will omit the operation of the 5th embodiment.
According to the present invention, because electric device is not installed, so signal handling equipment can miniaturization and can stably be operated and irrelevant with external environment condition.
Also have,,, and therefore improved the production efficiency of signal handling equipment and reduced cost so manufacturing process is simple because signal handling equipment of the present invention is used as the input signals circuit with printed circuit board.
Though only described the present invention, in not breaking away from claims subsequently, can carry out other modification and variation under the prerequisite of spirit of the present invention for required protection and category in conjunction with some preferred embodiment.
Claims (21)
1. signal handling equipment is used for the signal of being imported is carried out phase shift and signal is decayed, and comprising:
Input connector is used for input signal;
Out connector is used for output signal;
Rotor is subjected to rotatory force and rotates;
A plurality of rotatable components have groove respectively in periphery, these rotatable components are attached on the periphery of described rotor, make described groove communicate with each other; With
Signal transmission component is used for the signal of input is transferred to out connector, and signal transmission component is arranged in described groove and its two ends link to each other with described input, out connector respectively.
2. signal handling equipment according to claim 1 is characterized in that, also comprises the rotatory force generator, is used to provide rotatory force.
3. signal handling equipment according to claim 1 is characterized in that described rotatable components comprises first semicircular feature with first groove and has second semicircular feature of second groove that is communicated with first groove,
Wherein said signal transmission component comprises the semicircular arc conductor, and it has the curvature that is substantially equal to first and second grooves.
4. signal handling equipment according to claim 3 is characterized in that the height of first groove is different from the height of second groove.
5. signal handling equipment according to claim 4 is characterized in that described rotor comprises the axle that is connected to described rotatory force generator.
6. signal handling equipment according to claim 5, it is characterized in that described rotor also comprise with the periphery of described axle in conjunction with in case with first and second dishes of described axle motion and
Wherein first and second dishes are spaced from each other preset distance to be formed for placing the space of rotatable components.
7. signal handling equipment according to claim 6 is characterized in that first and second dishes and described axle integrally form.
8. signal handling equipment according to claim 7 is characterized in that rotatable components is made of insulating material respectively.
9. signal handling equipment according to claim 7 is characterized in that rotatable components is made of the absorber of energy radio wave absorbing respectively.
10. signal handling equipment is used for the signal of being imported is carried out phase shift and signal is decayed, and comprising:
Input connector is used for input signal;
Out connector is used for output signal;
Rotor, the power that is rotated is rotated, and described rotor has annular opening and is made by conductor in its underpart;
A plurality of rotatable components have groove in the bottom respectively, and these rotatable components are attached to the periphery of described rotor, make described groove communicate with each other; With
Signal transmission component has the terminal that is connected respectively to described input, out connector, thereby the signal that will be input to described input connector is transferred to described out connector, and described signal transmission component is arranged in described groove.
11. signal handling equipment according to claim 10 is characterized in that also comprising the rotatory force generator, is used to provide rotatory force.
12. signal handling equipment according to claim 10 is characterized in that rotatable components is made of insulating material respectively.
13. signal handling equipment according to claim 10 is characterized in that rotatable components is made of the absorber of energy radio wave absorbing respectively.
14. a signal handling equipment is used for the signal of being imported is carried out phase shift and signal is decayed, and comprising:
Input connector is used for input signal;
Out connector is used for output signal;
The rotatory force generator is used to provide rotatory force;
First rotor, the power that is rotated is rotated, and described first rotor has first of being connected to described rotatory force generator and is attached to described first periphery, first dish to move with described first;
First parts, the periphery that is attached to first is so that with described first motion;
Second parts relatively are attached to first periphery with described first parts, thereby with described first motion; With
Signal transmission component is used for the signal of input is transferred to out connector through input connector, and described signal transmission component is positioned at first and second parts below and its two ends link to each other with described input, out connector respectively.
15. signal handling equipment according to claim 14 is characterized in that described signal transmission component comprises the printed circuit board that has with the transmission line of electric conducting material coating, its two ends are connected respectively to described input, out connector.
16. signal handling equipment according to claim 15 is characterized in that the thickness of first parts is thicker than the thickness of second parts.
17. signal handling equipment according to claim 16, it is characterized in that first and second parts respectively adopt semi-circular shape and
Wherein said transmission line adopts the shape of semicircular arc, and curvature is substantially equal to the curvature of first, second parts.
18. signal handling equipment according to claim 14 is characterized in that first and second parts are made of insulating material respectively.
19. signal handling equipment according to claim 18 is characterized in that first and second parts are made of the absorber of energy radio wave absorbing respectively.
20. signal handling equipment according to claim 17 also comprises:
Second rotor, comprise be connected to first in case with first the motion second and be attached to second periphery, with described second the motion second the dish;
The 3rd parts are attached to described second periphery so that with described second motion; With
The 4th parts relatively are attached to described second periphery with described the 3rd parts, so that with described second motion; With
Wherein said signal transmission component is in being attached to first, second parts of first and being attached to space between second the 3rd, the 4th parts.
21. signal handling equipment according to claim 20 is characterized in that first parts and towards distance between the 3rd parts of described first parts and second parts and inequality towards the distance between the 4th parts of described second parts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990033577A KR20000075389A (en) | 1999-05-19 | 1999-08-16 | Apparatus for shifting phase of inputted signal and attenuating the signal |
| KR33577/1999 | 1999-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1284797A true CN1284797A (en) | 2001-02-21 |
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ID=19607257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00128993A Pending CN1284797A (en) | 1999-08-16 | 2000-08-16 | Signal processing equipment for phase-shifting and attenuating input signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1284797A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637924A (en) * | 2011-02-10 | 2012-08-15 | 佳能株式会社 | Printed circuit board |
| CN105379108A (en) * | 2013-07-16 | 2016-03-02 | Lg伊诺特有限公司 | Phase shifter and transmission system equipped with same |
-
2000
- 2000-08-16 CN CN00128993A patent/CN1284797A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637924A (en) * | 2011-02-10 | 2012-08-15 | 佳能株式会社 | Printed circuit board |
| CN102637924B (en) * | 2011-02-10 | 2014-07-16 | 佳能株式会社 | Printed circuit board |
| US8957746B2 (en) | 2011-02-10 | 2015-02-17 | Canon Kabushiki Kaisha | Parallel 1/4 wavelength line frequency filter |
| CN105379108A (en) * | 2013-07-16 | 2016-03-02 | Lg伊诺特有限公司 | Phase shifter and transmission system equipped with same |
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