Summary of the invention
A purpose of the invention is to provide a kind of antenna-switching device that can reduce the loss of signal, wherein antenna switchingDevice includes multiple switching modules, and each switching module includes multiple concatenated switch units.In each switching module extremelyThe width of a few switch unit is less than other switch units, will can effectively reduce parasitism caused by antenna-switching device wherebyCapacitor, and radiofrequency signal generated energy loss when passing through antenna-switching device is reduced, and improve antenna-switching deviceVoltage standing wave ratio.
In order to achieve the above objectives, the present invention provides a kind of antenna-switching device that can reduce the loss of signal, including multiple cutsBlock is changed the mold, one end of each switching module connects an antenna element, and the other end is then separately connected a sending and receiving end, wherein each cutChanging the mold block includes multiple switch units, and multiple switch units are connected in series to, wherein at least one switch unitWidth is less than the width of other switch units.
The present invention also provides the antenna-switching devices that another kind can reduce the loss of signal, comprising: multiple first order switch mouldBlock is electrically connected an antenna element, wherein each first order switching module includes multiple concatenated first order switch units；And it is moreEach first order switching module is electrically connected in a second level switching module, and wherein second level switching module includes multiple stringsThe second level switch unit of connection, wherein near antenna element and near second level switching module in first order switching moduleThe width of first order switch unit is less than the width of other first order switch units, and near first in the switching module of the second levelThe width of the second level switch unit of grade switching module is less than the width of other second level switch units.
In one embodiment of inventive antenna switching device, wherein near the switch unit of antenna element in switching moduleWidth be less than other switch units width.
In one embodiment of inventive antenna switching device, wherein near two switchings of antenna element in switching moduleThe width of unit is less than the width of other switch units.
In one embodiment of inventive antenna switching device, wherein the width of the switch unit in switching module is by sending and receiving endIt is gradually reduced toward the direction of connection antenna element.
Further include multiple ground connection switching modules in one embodiment of inventive antenna switching device, is electrically connected eachA switching module and ground terminal.
In one embodiment of inventive antenna switching device, wherein each switch unit includes multiple transistor components, andEach transistor component connects in parallel.
In one embodiment of inventive antenna switching device, wherein the width of switch unit is the width of each transistor componentThe sum total of degree.
In one embodiment of inventive antenna switching device, wherein near the switch unit of antenna element in switching moduleTransistor component quantity be less than other switch units.
In one embodiment of inventive antenna switching device, wherein in first order switching module near antenna element and mostIt is less than the width of other first order switch units close to the width of two first order switch units of second level switching module.
In one embodiment of inventive antenna switching device, wherein first order switch unit and second level switch unit includeMultiple transistor components, and each transistor component connects in parallel.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Detailed description of the invention
Fig. 1 is the organigram of existing antenna-switching device；
Fig. 2 is the circuit connection diagram for one embodiment of antenna-switching device that the present invention can reduce the loss of signal；
Fig. 3 is the circuit connection diagram for the another embodiment of antenna-switching device that the present invention can reduce the loss of signal；
Fig. 4 is the circuit connection diagram for the another embodiment of antenna-switching device that the present invention can reduce the loss of signal.
Wherein, appended drawing reference
10 antenna-switching device, 11 antenna element
13 switch unit, 15 sending and receiving end
20 antenna-switching device, 200 antenna-switching device
21 switching module, 211 switch unit
2111 first switch unit, 2,113 second switch unit
2117 (n-1) switch unit, 2,119 n-th switch unit
23 antenna element, 25 sending and receiving end
27 ground connection switching modules
30 antenna-switching device, 31 first order switching module
311 first order switch unit, 33 second level switching module
331 second level switch unit, 35 antenna element
37 sending and receiving ends 39 are grounded switching module
Specific embodiment
Structural principle and working principle of the invention are described in detail with reference to the accompanying drawing:
In this specification and subsequent scope of the claims, " coupling " and " connection " word includes any directly and indirectConnection or means of electrical connection.Therefore, if it is described herein that a first device is connected to a second device, then first device is representedIt may be directly connected to second device, or be indirectly connected with second device by other devices or connection means.
Referring to Fig. 2, the circuit connection signal of one embodiment of antenna-switching device of the loss of signal can be reduced for the present inventionFigure.As shown, antenna-switching device 20 of the present invention includes multiple switching modules 21, wherein each switching module 21One end connects an antenna element 23, and the other end of each switching module 21 is then separately connected different sending and receiving ends 25.
Each switching module 21 can be switched respectively in practical application, such as open (on) one of switching module 21,And (off) other switching modules 21 are closed, so that antenna element 23 is electrically connected wherein one by the switching module 21 openedA sending and receiving end 25.Antenna element 23 can will be sent to one of them via switching module 21 by extraneous received radiofrequency signal wherebySending and receiving end 25, or by one of sending and receiving end 25 by radiofrequency signal via 21 transmitting antenna unit 23 of switching module, and pass throughAntenna element 23 emits radiofrequency signal.
Each switching module 21 described in the embodiment of the present invention includes multiple switch units 211, wherein each switch unit211 are connected in series to, and furthermore the width of at least one switch unit 211 in each switching module 21 is less than othersThe width of switch unit 211 is, for example, less than the 80% of other 211 width of switch unit.
In a preferred embodiment of the present invention, cut in each switching module 21 near one or two of antenna element 23The width for changing unit 211 is less than the width of other switch units 211.Each switch unit 211 of the present invention may include moreThe transistor component of a parallel connection, such as the metal oxide semiconductcor field effect transistor (MOSFET of multiple parallel connections；Metal-Oxide-Semiconductor Field-Effect Transistor), wherein the width of each switch unit 211 is parallel connectionTransistor component width sum total, such as each field-effect transistor channel width (channel width) sum total.
In general, large-sized transistor component is often drawn as finger-shaped (finger-type) in layout, with this hairFor the bright switch unit 211, if the transistor component of each switch unit 211 is all the component of same size, and haveThere is identical width, then the width that can be transistor component is multiplied Yu Zhizhuan (finger) by the width of each switch unit 211Quantity.
In other words, if the transistor component of each switch unit 211 is all the component of same size, each switching moduleIt is less than the finger of other switch units 211 in 21 near the finger-like quantity of one or two switch unit 211 of antenna element 23Near the transistor of one or two switch unit 211 of antenna element 23 in shape quantity or each switching module 21The quantity of component is less than the quantity of the transistor component of other switch units 211.
In the above embodiment of the present invention, near antenna element 23 one or two switch unit 211 width compared withIt is small, and the width of other switch units 211 is then rough equal.In an alternative embodiment of the invention, each of switching module 21 cutsThe width for changing unit 211 also can be neither identical, and wherein the width of switch unit 211 is from sending and receiving end 25 toward connection antenna element 23Direction is gradually reduced, and can equally reduce parasitic capacitance caused by the switching module 21 of closing.
Specifically concatenated switch unit 211 can be respectively defined as the first switch unit in each switching module 212111, the second switch unit 2113 ..., (n-1) switch unit 2117 and the n-th switch unit 2119, wherein the first switching is singleFirst 2111, second switch unit 2113 ..., (n-1) switch unit 2117 and the n-th switch unit 2119 sequentially connect, and theOne switch unit 2111 is near antenna element 23, and the n-th switch unit 2119 is then farthest away from antenna element 23.In the present invention oneIn embodiment, the width of the width of the first switch unit 2111 less than the second switch unit 2113；…；And (n-1) switching is singleWidth of the width of member 2117 less than the n-th switch unit 2119.
In an embodiment of the present invention, each switching module 21 can also pass through the ground connection connection ground connection of switching module 27 respectivelyEnd, such as one end of ground connection switching module 27 are electrically connected switching module 21 and sending and receiving end 25, and the other end then connects ground terminal.It whereby can be by switching each ground connection switching module 27, so that each switching module 21 is separately connected ground terminal.
In embodiments of the present invention, as shown in Fig. 2, the quantity of antenna element 23 is one, and sending and receiving end 25 and switching mouldThe quantity of block 21 is then two, and wherein antenna element 23 is electrically connected two switching modules 21, and passes through two switch units 21It is separately connected two sending and receiving ends 25.Certainly in practical application, the quantity of antenna element 23 also can be multiple, and sending and receiving end 25 andThe quantity of switching module 21 also can be two or more.
In practical application when one of switching module 21 of antenna-switching device 20 opens (on), another switchingModule 21 can then close (off).One or two due to switching module 21 of the present invention near antenna element 23 is cutThe width for changing unit 211 is smaller, therefore can reduce weight between antenna element 23 and one or two hithermost switch unit 211An at least conductive part would generally be set on folded area, such as antenna element 23 and switch unit 211, by reducing switch unit211 width, by can reduce antenna element 23 conductive part and one or two hithermost switch unit 211 conductive part itBetween overlapping area, generated parasitic electricity between the switching module 21 of closing and antenna element 23 will be can effectively reduce wherebyHold, and can avoid the energy of the switching module 21 closed loss transmission or received radiofrequency signal, and improve antenna-switching device20 voltage standing wave ratio.
In different embodiments, as shown in figure 3, switching module 21 and the quantity of sending and receiving end 25 also can be two or more, and(on) one of switching module 21 would generally be opened when transmitting or receiving signal, and closes (off) other switching modules21.Since the switching module 21 of each closing is to connect in parallel, produced by the switching module 21 of each closingParasitic capacitance will be connected in parallel to each other, and then formed a huge parasitic capacitance.
In the present invention since each switching module 21 is near one or two switch unit 211 of antenna element 23Width is smaller or the width of each switch unit 211 is gradually reduced from sending and receiving end 25 toward the direction of connection antenna element 23,Therefore generated parasitic capacitance between the switching module 21 of each closing and antenna element 23 can be reduced, and antenna is greatly reducedThe whole parasitic capacitance of switching device 200, and reduce the energy loss of transmission or received radiofrequency signal.
Referring to Fig. 4, the circuit connection for the antenna-switching device another embodiment of the invention that can reduce the loss of signal is shownIt is intended to.As shown, antenna-switching device 30 of the present invention includes multiple first order switching modules 31 and multiple second levelSwitching module 33, wherein one end of each first order switching module 31 connects an antenna element 35, and each first order switches mouldThe other end of block 33 is then separately connected multiple second level switching modules 33, and furthermore the other end of each second level switching module 33 is thenConnect sending and receiving end 37.
First order switching module 31 includes multiple concatenated first order switch units 311, wherein each first order switches mouldNear one or two first order switch unit 311 of antenna element 35 in block 31, and near second level switching module 33One or two first order switch unit 311 width it is small compared with the width of other first order switch units 311.
Second level switching module 33 then includes multiple concatenated second level switch units 331, wherein each second level switchesIn module 33 near the width of one or two second level switch unit 331 of first order switching module 31 be less than other secondThe width of grade switch unit 331.
The first order switch unit 311 of first order switching module 31 and the second level switch unit of second level switching module 33331 all include the transistor component of multiple parallel connections, such as the metal oxide semiconductcor field effect transistor of multiple parallel connections(MOSFET；Metal-Oxide-Semiconductor Field-Effect Transistor), wherein first order switch unit311 and second level switch unit 331 width be transistor component in parallel width sum total, such as each field-effect transistorChannel width (channel width) sum total.
Since first order switching module 31 is near the width of one or two first order switch unit 311 of antenna element 35Degree is smaller, therefore can reduce face be overlapped between antenna element 35 and one or two hithermost first order switch unit 311Product, for example, reduce antenna element 35 conductive part and one or two hithermost first order switch unit 311 conductive part itBetween overlapping area, and reduce generated parasitic capacitance between antenna element 35 and first order switching module 31.
Furthermore one or two first order switch unit of first order switching module 31 near second level switching module 33311 width is smaller, and second level switching module 33 switches near one or two second level of first order switching module 31The width of unit 331 is smaller, therefore can reduce weight between similar first order switch unit 311 and second level switch unit 331Folded area, for example, reduce similar first order switch unit 311 conductive part and second level switch unit 331 conductive part itBetween overlapping area, and reduce generated parasitic capacitance between first order switching module 31 and second level switching module 33.
In an embodiment of the present invention, each second level switching module 33 can also be connected by a ground connection switching module 39 respectivelyGround terminal is connect, such as is grounded one end electric connection second level switching module 33 and the sending and receiving end 37 of switching module 39, and the other endThen connect ground terminal.It whereby can be by switching each ground connection switching module 39, so that each second level switching module 33 is distinguishedConnect ground terminal.
One of first order switching module 31 would generally be opened in practical application, and is opened and connected first order switchingOne of second level switching module 33 of module 31, and other first order switching modules 31 and second level switching module 33 then canIt closes.Antenna element 35 will can pass through the first order switching module 31 and the connection of second level switching module 33 wherein one of unlatching wherebyA sending and receiving end 37, so that antenna element 35 can be with the transmission that can carry out radiofrequency signal between the sending and receiving end 37 that is electrically connected.
The first order switching module 31 of closing can be reduced in antenna-switching device 30 of the present invention and the second level switchesThe parasitic capacitance that module 33 generates, therefore the switching module that can effectively solve existing closing is connected in parallel to each other and generates huge postRaw capacitor, whereby to reduce the energy loss that radiofrequency signal generates when through antenna-switching device 30.
Described in the system of specification perhaps, must and wordings and the non-present invention such as variation limitation.Specification instituteThe technical term used is not mainly limitation of the invention to carry out the description of specific embodiment.Used in specificationSingular magnitude (such as one and this) also can be it is multiple, unless the content in specification expressly states otherwise.Such as specification instituteThe device referred to may include there are two or more than two devices combination, and the substance that specification is mentioned then may includeThere are many mixing of substance.
Certainly, the invention may also have other embodiments, without deviating from the spirit and substance of the present invention, ripeIt knows those skilled in the art and makes various corresponding changes and modifications, but these corresponding changes and change in accordance with the present inventionShape all should fall within the scope of protection of the appended claims of the present invention.