CN103138794A - Radio frequency device and wireless communication device - Google Patents
Radio frequency device and wireless communication device Download PDFInfo
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- CN103138794A CN103138794A CN2011103845788A CN201110384578A CN103138794A CN 103138794 A CN103138794 A CN 103138794A CN 2011103845788 A CN2011103845788 A CN 2011103845788A CN 201110384578 A CN201110384578 A CN 201110384578A CN 103138794 A CN103138794 A CN 103138794A
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Abstract
The invention provides a radio frequency device and a wireless communication device. The radio frequency device is used for a wireless communication device, and the radio frequency device includes a ground connection component, an antenna, a ground connection end, a capacitance induction component and at least one capacitor. The ground connection component is used for providing ground connection; the antenna includes a radiator, a signal feed-in component, the signal feed-in component is coupled with the radiator, and is used for transmitting a radio frequency signal to the radiator so as to launch the radio frequency signal through the radiator; the ground connection end is coupled with the ground connection component; the capacitance induction component is electrically connected with the radiator of the antenna, and is used for inducting an environment capacitance within a specific range through the radiator; at least one capacitor is in connection between the ground connection end of the antenna and the ground connection component, and is used for blocking-up a direct current signal path from the ground connection end to the ground connection component. The radio frequency device can avoid the influence on radiation efficiency of the antenna, and reduce the cost of design and production, and bring convenience to parts management.
Description
Technical field
The present invention relates to a kind of radio-frequency unit and radio communication device, espespecially a kind of radiation efficiency of avoiding affecting antenna, and can reduce design and radio-frequency unit and the radio communication device of production cost.
Background technology
Radio communication device is by antenna transmission or receive radio wave, with transmission or exchange radio signal, and then accesses a wireless communication system.Radio wave is a kind of string ripple signal of the higher-order of oscillation, so there is certain standard countries in the world for its energy, and main purpose is to avoid the user is impacted or disturbs the running of other radio communication devices.For instance, suggestion human body specific absorption rate (the Specific Absorption Rate of the international non-free radiation protection committee (International Commission on Non-Ionizing Radiation Protection), SAR) value should not surpass 2.0W/Kg, and 1.6W/Kg advises being no more than in FCC (Federal Communications Commission, FCC).The human body specific absorption rate refers in general electromagnetic radiation environment the organism unit mass to the electromagnetic wave energy specific absorption rate, this numerical value with W/Kg as unit.In addition, the applied environment of different communication product is different, therefore can further consider distance factor, for example, for hand-held radio communication devices such as mobile phone, intelligent mobile phones, essential testing SA R value when being generally predetermined distance human body 20cm.
As known in the art, reduce the external interference (being the SAR value) of radio communication device and will certainly affect antenna performance, therefore in order to keep simultaneously antenna performance, known technology has proposed many modes, one of them be exactly with come near inductor the sensing human body near situation; That is to say, when human body proximity being detected near inductor, reduce wireless energy signal, and when human body proximity not detected near inductor, keep or suitably improve wireless energy signal.In this case, can take into account simultaneously reduction and disturb and keep two kinds of demands of antenna performance.Yet, knownly need comprise receiver or the sensor with metal material near inductor, in order to the capacitance variations of sensing human body proximity, thereby the judgement human body near situation.The receiver that this adds or sensor can exert an influence to antenna efficiency, cause working band to narrow down, and in other words, the antenna that is applicable to the broadband demand originally can cause working band to narrow down because of receiver or the sensor that adds.In this case, for the different communication systems with close bandwidth requirements, must design respectively applicable antenna, except increasing design and production cost, also unfavorable for part management.
Therefore, known technology has improved necessity in fact.
Summary of the invention
Therefore, main purpose of the present invention namely is to provide a kind of radio-frequency unit and radio communication device, disturbs and keep two kinds of demands of antenna performance to take into account to reduce.
The present invention discloses a kind of radio-frequency unit, and this radio-frequency unit is used for a radio communication device, and this radio-frequency unit comprises: a grounding assembly, and this grounding assembly is used to provide ground connection; One antenna, this antenna comprises: a radiant body; One signal feed-in assembly, this signal feed-in assembly is coupled to this radiant body, is used for a radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And an earth terminal, this earth terminal is used for coupling this grounding assembly; One capacitive sensing assembly (capacitive sensingunit), this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, an environment capacitance of induction one particular range; And at least one electric capacity, this at least one electric capacity is electrically connected between this earth terminal and this grounding assembly of this antenna, is used for blocking this earth terminal to a direct current signal path of this grounding assembly.
The present invention also discloses a kind of radio communication device, and this radio communication device comprises: a radio frequency signal processing equipment, and this radio frequency signal processing equipment is used for producing a radiofrequency signal, and according to an induction result, adjusts the energy of this radiofrequency signal; And a radio-frequency unit, this radio-frequency unit comprises: a grounding assembly, and this grounding assembly is used to provide ground connection; One antenna, this antenna comprises: a radiant body; One signal feed-in assembly, this signal feed-in assembly is coupled to this radiant body, is used for this radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And an earth terminal, this earth terminal is used for coupling this grounding assembly; One capacitive sensing assembly, this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, and an environment capacitance of induction one particular range is to produce this induction result; And at least one electric capacity, this at least one electric capacity is electrically connected between this earth terminal and this grounding assembly of this antenna, is used for blocking this earth terminal to a direct current signal path of this grounding assembly.
The present invention also discloses a kind of radio-frequency unit, and this radio-frequency unit is used for a radio communication device, and this radio-frequency unit comprises: an antenna, and this antenna comprises: a radiant body; And a signal feed-in assembly, this signal feed-in assembly is used for a radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And a capacitive sensing assembly, this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, and an environment capacitance of induction one particular range; Wherein, this signal feed-in assembly or this capacitive sensing assembly are blocked the direct current signal path between this radiant body to one ground end.
The present invention also discloses a kind of radio communication device, and this radio communication device comprises: a radio frequency signal processing equipment, and this radio frequency signal processing equipment is used for producing a radiofrequency signal, and according to an induction result, adjusts the energy of this radiofrequency signal; And a radio-frequency unit, this radio-frequency unit comprises: an antenna, and this antenna comprises: a radiant body; And a signal feed-in assembly, this signal feed-in assembly is used for this radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And a capacitive sensing assembly, this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, and an environment capacitance of induction one particular range is to produce this induction result; Wherein, this signal feed-in assembly or this capacitive sensing assembly are blocked the direct current signal path between this radiant body to one ground end.
The present invention utilizes the environment capacitance of the radiant body induction particular range of antenna, and adjusts according to this wireless energy signal, thereby can avoid affecting the radiation efficiency of antenna, takes into account simultaneously to reduce and disturbs and keep two kinds of demands of antenna performance; Simultaneously, only needing the design single antenna is applicable different communication systems with close bandwidth requirements, can further reduce design and production cost, and be conducive to part management.
Description of drawings
Fig. 1 is the schematic diagram of a radio communication device of the embodiment of the present invention.
Fig. 2 A is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Fig. 2 B is the schematic diagram of a variation pattern of the radio-frequency unit of Fig. 2 A.
Fig. 2 C is the schematic diagram of a variation pattern of the radio-frequency unit of Fig. 2 A.
Fig. 2 D is the schematic diagram of a variation pattern of the radio-frequency unit of Fig. 2 A.
Fig. 3 is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Fig. 4 is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Fig. 5 is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Fig. 6 is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Fig. 7 is the schematic diagram of a radio communication device of the embodiment of the present invention.
Fig. 8 is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Fig. 9 is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Figure 10 is the schematic diagram of a radio-frequency unit of the embodiment of the present invention.
Figure 11 is the schematic diagram of a radio frequency signal processing equipment of the embodiment of the present invention.
Figure 12 is the schematic diagram of a radio frequency signal processing equipment of the embodiment of the present invention.
Figure 13 is the schematic diagram of a capacitive sensing assembly of the embodiment of the present invention.
The primary clustering symbol description:
10,70 radio communication devices
100,700,1100,1200 radio frequency signal processing equipments
102,202,302,402,502,602,702,802,902,1002 radio-frequency units
104,204,304,404,504,604 grounding assemblies
106,206,306,406,506,606,706,806,906,1006 antennas
108,208,308,408,508,608,708,808,908,1008 radiant bodies
110,210,310,410,510,610,710,810,910,1010 signal feed-in assemblies
112,212,312,412,512,612 earth terminals
114,214,314,414,514,614,714,814,914,1014,1300 capacitive sensing assemblies
116,216,316,416,516,616 electric capacity
CAP_rst responds to result
The RF_sig radiofrequency signal
1112,1212 signal generator modules
1114 attenuation module
1116,1216 handover modules
R1～R3,1214 resistance
1302 judging units
C_INT, C_Sensing, C_HAND electric capacity
The PIN_Sensing pin
The V_STEP critical voltage value
The N_CHARGE charging times
N_BARRIER barrier charging times
SW1, SW2 switch
Embodiment
Disturb and keep two kinds of demands of antenna performance in order to take into account to reduce, the present invention also by the capacitance variations of sensing human body proximity, adjusts wireless energy signal according to this.Yet, being different from receiver that known technology need add or sensor and affecting antenna efficiency, the present invention need not add receiver or sensor, but utilizes the environment capacitance of the radiant body induction particular range of antenna, and adjusts according to this wireless energy signal.Below will according to the difference of antenna form, be divided into two large class declaration concepts of the present invention.
At first, for having the antenna of direct current access path between radiant body and ground, please refer to Fig. 1, Fig. 1 is the schematic diagram of a radio communication device 10 of the embodiment of the present invention.Radio communication device 10 can be any electronic product with radio communication function, and as mobile phone, computer system, accessing wirelessly point device etc., it is comprised of a radio frequency signal processing equipment 100 and a radio-frequency unit 102 briefly.Radio frequency signal processing equipment 100 is used for producing a radiofrequency signal RF_sig, and the induction of the environment capacitance that can return according to radio-frequency unit 102 CAP_rst as a result, adjusts the energy of radiofrequency signal RF_sig.Radio-frequency unit 102 includes a grounding assembly 104, an antenna 106, a capacitive sensing assembly 114 and an electric capacity 116.Antenna 106 includes a radiant body 108, a signal feed-in assembly 110 and an earth terminal 112.Capacitive sensing assembly 114 is electrically connected at radiant body 108, is used for by radiant body 108, and the environment capacitance of induction particular range, and produce according to this induction CAP_rst as a result.In addition, electric capacity 116 is used for blocking earth terminal 112 to the direct current signal path of grounding assembly 104 between the earth terminal 112 and grounding assembly 104 of antenna 106.
In simple terms, in radio communication device 10, capacitive sensing assembly 114 utilizes the radiant body 108 of antenna 106 to come the induced environment capacitance, and will respond to as a result that CAP_rst is sent to radio frequency signal processing equipment 100, make radio frequency signal processing equipment 100 adjust according to this energy of radiofrequency signal RF_sig.In addition, because antenna 106 and 104 of grounding assemblies have the direct current access path, therefore radio-frequency unit 102 utilizes electric capacity 116 blocking-up earth terminals 112 to the direct current signal path of grounding assembly 104, by this, can avoid capacitive sensing assembly 114 by grounding assembly 104 induced environment capacitances.
Known technology usually utilizes the capacitance variations near inductor sensing human body proximity, thus the judgement human body near situation.Yet, need comprise receiver or the sensor with metal material near inductor, the receiver that this adds or sensor can exert an influence to antenna efficiency, cause working band to narrow down.By contrast, the capacitive sensing assembly 114 of radio communication device 10 utilizes the radiant body 108 of antenna 106 to respond to.In other words, the present invention need not increase receiver or sensor, and in radio-frequency unit 102, original radiant body 108 carries out the induction of environment capacitance but utilize.Thus, can avoid affecting the radiation efficiency of antenna 106, the more important thing is, for the different communication systems with close bandwidth requirements, only need the design single antenna to get final product, thereby can reduce design and production cost, and be conducive to part management.
Should be noted, 10 explanations of the radio communication device of Fig. 1 are for having the antenna of direct current access path between radiant body and ground, as why not increasing receiver or the inductor that may affect antenna efficiency, and the actual induction human body near situation.Those of ordinary skills should do different modifications according to this, and are not limited to this.For instance, have the antenna of direct current access path between antenna 106 expression radiant bodies and ground, but be not limited to any form.Similarly, capacitive sensing assembly 114 is by the radiant body 108 induced environment capacitances of antenna 106, but its function mode, producing method, form or the content etc. of CAP_rst are neither as a result is limited to any rule with respect to the link position of radiant body 108, induction.In addition, electric capacity 116 is in order to block earth terminal 112 to the direct current signal path of grounding assembly 104, but in different application, may need a plurality of electric capacity just can reach identical purpose (blocking-up radiant body 108 is to the direct current signal path of grounding assembly 104), or need special requirement (as large capacitance) etc., all should belong to simple change of the present invention.
For instance, please refer to Fig. 2 A, Fig. 2 A is the schematic diagram of a radio-frequency unit 202 of the embodiment of the present invention.Radio-frequency unit 202 is an execution mode of the radio-frequency unit 102 of Fig. 1, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 202 includes a grounding assembly 204, an antenna 206, a capacitive sensing assembly 214 and an electric capacity 216, and antenna 206 includes a radiant body 208, a signal feed-in assembly 210 and an earth terminal 212.By Fig. 2 A as can be known, antenna 206 is a double frequency antenna.In addition, capacitive sensing assembly 214 and signal feed-in assembly 210 conodes, but be not limited to this, as long as guarantee that capacitive sensing assembly 214 can be electrically connected at radiant body 208.For example, Fig. 2 B and Fig. 2 C have shown respectively the set-up mode of other two kinds of capacitive sensing assemblies 214, and it all belongs to category of the present invention.
As long as Fig. 2 B and Fig. 2 C have shown the set-up mode of capacitive sensing assembly 214 and can be electrically connected at radiant body 208, in addition, the set-up mode of electric capacity 216 also can suitably be adjusted, as long as can the blocking capacitor sexuality answer assembly 214 to the direct current access path of grounding assembly 204.In other words, when capacitive sensing assembly 214 is arranged at the tail end of radiant body 208 (embodiment of Fig. 2 B), electric capacity 216 also can change the position that is arranged at as shown in Fig. 2 D; At this moment, the position of earth terminal 212 also redefines.In simple terms, in the present invention, earth terminal 212 (or earth terminal 112) is to be defined as the point of radiant body 208 to the path of grounding assembly 204, and is more accurate, for the position of definition electric capacity 216 with respect to capacitive sensing assembly 214, therefore the adaptability adjustment.
Similarly, other multi-form but antennas with same characteristic features (having the direct current access path between radiant body and ground) also can be suitably derivative and change according to the embodiment of Fig. 2 A to Fig. 2 D.
Please refer to Fig. 3, Fig. 3 is the schematic diagram of a radio-frequency unit 302 of the embodiment of the present invention.Radio-frequency unit 302 is an execution mode of the radio-frequency unit 102 of Fig. 1, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 302 includes a grounding assembly 304, an antenna 306, a capacitive sensing assembly 314 and an electric capacity 316, and antenna 306 includes a radiant body 308, a signal feed-in assembly 310 and an earth terminal 312.As shown in Figure 3, antenna 306 is a planar inverted-F antenna, in addition, only need guarantee that capacitive sensing assembly 314 can be electrically connected at radiant body 308 and get final product, the positions of other setting positions as capacitive sensing assembly 314, electric capacity 316 etc. all can be imitated the embodiment of Fig. 2 B to Fig. 2 D and suitably be adjusted, therefore be not repeated herein.
Please refer to Fig. 4, Fig. 4 is the schematic diagram of a radio-frequency unit 402 of the embodiment of the present invention.Radio-frequency unit 402 is an execution mode of the radio-frequency unit 102 of Fig. 1, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 402 includes a grounding assembly 404, an antenna 406, a capacitive sensing assembly 414 and an electric capacity 416, and antenna 406 includes a radiant body 408, a signal feed-in assembly 410 and an earth terminal 412.As shown in Figure 4, antenna 406 is a bipolar antenna, in addition, only need guarantee that capacitive sensing assembly 414 can be electrically connected at radiant body 408 and get final product, the positions of other setting positions as capacitive sensing assembly 414, electric capacity 416 etc. all can be imitated the embodiment of Fig. 2 B to Fig. 2 D and suitably be adjusted, therefore be not repeated herein.
Please refer to Fig. 5, Fig. 5 is the schematic diagram of a radio-frequency unit 502 of the embodiment of the present invention.Radio-frequency unit 502 is an execution mode of the radio-frequency unit 102 of Fig. 1, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 502 includes a grounding assembly 504, an antenna 506, a capacitive sensing assembly 514 and an electric capacity 516, and antenna 506 includes a radiant body 508, a signal feed-in assembly 510 and an earth terminal 512.As shown in Figure 5, antenna 506 is a collapsible dipole antenna, in addition, only need guarantee that capacitive sensing assembly 514 can be electrically connected at radiant body 508 and get final product, the positions of other setting positions as capacitive sensing assembly 514, electric capacity 516 etc. all can be imitated the embodiment of Fig. 2 B to Fig. 2 D and suitably be adjusted, therefore be not repeated herein.
In addition, for the radio communication device 10 of Fig. 1, the present invention is the feed-in mode of restricting signal feed-in assembly 110 not also, that is signal feed-in assembly 110 can be coupled to radiant body 108 by coupled modes or electric connection mode.For instance, please refer to Fig. 6, Fig. 6 is the schematic diagram of a radio-frequency unit 602 of the embodiment of the present invention.Radio-frequency unit 602 is an execution mode of the radio-frequency unit 102 of Fig. 1, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 602 includes a grounding assembly 604, an antenna 606, a capacitive sensing assembly 614 and an electric capacity 616, and antenna 606 includes a radiant body 608, a signal feed-in assembly 610 and an earth terminal 612.As shown in Figure 6, signal feed-in assembly 610 is sent to radiant body 608 by coupling feed-in mode with radiofrequency signal RF_sig, in addition, only need guarantee that capacitive sensing assembly 614 can be electrically connected at radiant body 608 and get final product, the positions of other setting positions as capacitive sensing assembly 614, electric capacity 616 etc. all can be imitated the embodiment of Fig. 2 B to Fig. 2 D and suitably be adjusted, therefore be not repeated herein.
On the other hand, as previously mentioned, in different application, may need a plurality of electric capacity could block radiant body 108 to the direct current signal path of grounding assembly 104, common example such as slot antenna, slotted eye integrated antennas etc.These use the variation of a plurality of electric capacity in response to many direct current signals path, should belong to the common technology of those of ordinary skills, therefore be not repeated herein.
In addition, for not having the antenna of direct current access path between radiant body and ground, please refer to Fig. 7, Fig. 7 is the schematic diagram of a radio communication device 70 of the embodiment of the present invention.Radio communication device 70 can be any electronic product with radio communication function, and as mobile phone, computer system, accessing wirelessly point device etc., it is comprised of a radio frequency signal processing equipment 700 and a radio-frequency unit 702 briefly.Radio frequency signal processing equipment 700 is used for producing a radiofrequency signal RF_sig, and the induction of the environment capacitance that can return according to radio-frequency unit 702 CAP_rst as a result, adjusts the energy of radiofrequency signal RF_sig.Radio-frequency unit 702 includes an antenna 706 and a capacitive sensing assembly 714, and antenna 706 includes a radiant body 708 and a signal feed-in assembly 710.Capacitive sensing assembly 714 is electrically connected at radiant body 708, is used for by radiant body 708, and the environment capacitance of induction particular range, and produce according to this induction CAP_rst as a result.
In simple terms, function mode and radio communication device 10 at radio communication device 70 are similar, utilize radiant body 708 to come the induced environment capacitance by capacitive sensing assembly 714, and will respond to as a result that CAP_rst is sent to radio frequency signal processing equipment 700, make radio frequency signal processing equipment 700 adjust according to this energy of radiofrequency signal RF_sig.Radio communication device 70 is do not have the direct current access path between antenna 706 and ground with radio communication device 10 differences, so radio-frequency unit 702 does not need need utilize electric capacity blocking-up antenna to the direct current signal path on ground as radio-frequency unit 102.Therefore, radio communication device 70 also need not increase receiver or sensor, and in radio-frequency unit 702, original radiant body 708 carries out the induction of environment capacitance but utilize.Thus, can avoid affecting the radiation efficiency of antenna 706, the more important thing is, for the different communication systems with close bandwidth requirements, only need the design single antenna to get final product, thereby can reduce design and production cost, and be conducive to part management.
Should be noted, 70 explanations of the radio communication device of Fig. 7 are not for having the antenna of direct current access path between radiant body and ground, as why not increasing receiver or the inductor that may affect antenna efficiency, and the actual induction human body near situation.Other derivative variations can be imitated aforesaid embodiment and get, and are not limited to this.For instance, please refer to Fig. 8, Fig. 8 is the schematic diagram of a radio-frequency unit 802 of the embodiment of the present invention.Radio-frequency unit 802 is an execution mode of the radio-frequency unit 702 of Fig. 7, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 802 includes an antenna 806 and a capacitive sensing assembly 814, and antenna 806 includes a radiant body 808 and a signal feed-in assembly 810.As shown in Figure 8, antenna 806 is a unipole antenna, in addition, only need guarantee that capacitive sensing assembly 814 can be electrically connected at radiant body 808 and get final product, and other all can suitably be adjusted as setting position of capacitive sensing assembly 814 etc., therefore be not repeated herein.
Please refer to Fig. 9, Fig. 9 is the schematic diagram of a radio-frequency unit 902 of the embodiment of the present invention.Radio-frequency unit 902 is an execution mode of the radio-frequency unit 702 of Fig. 7, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 902 includes an antenna 906 and a capacitive sensing assembly 914, and antenna 906 includes a radiant body 908 and a signal feed-in assembly 910.As shown in Figure 9, antenna 906 is a loop aerial, in addition, only need guarantee that capacitive sensing assembly 914 can be electrically connected at radiant body 908 and get final product, and other all can suitably be adjusted as setting position of capacitive sensing assembly 914 etc., therefore be not repeated herein.
Please refer to Figure 10, Figure 10 is the schematic diagram of a radio-frequency unit 1002 of the embodiment of the present invention.Radio-frequency unit 1002 is an execution mode of the radio-frequency unit 702 of Fig. 7, therefore the assembly of identical function adopts identical naming method, that is radio-frequency unit 1002 includes an antenna 1006 and a capacitive sensing assembly 1014, and antenna 1006 includes a radiant body 1008 and a signal feed-in assembly 1010.As shown in Figure 10, antenna 1006 is a plate aerial, and therefore, capacitive sensing assembly 1014 preferably is electrically connected at radiant body 1008, but is not limited to this.
Whether and between ground above-described embodiment has the direct current access path according to the radiant body of antenna, and is divided into two large class declarations, need not increase receiver or sensor in order to illustrate the present invention, and in radio-frequency unit, original radiant body carries out the induction of environment capacitance but utilize.Thus, can avoid affecting the radiation efficiency of antenna, the more important thing is, for the different communication systems with close bandwidth requirements, only need the design single antenna to get final product, thereby can reduce design and production cost, and be conducive to part management.
On the other hand, function mode for radio frequency signal processing equipment 100 or 700 is not limited to ad hoc rules, as long as can be according to responding to CAP_rst as a result, the energy of suitably adjusting radiofrequency signal RF_sig gets final product, clearer and more definite, when CAP_rst shows human body proximity as a result, should reduce the energy of radiofrequency signal RF_sig when induction.For instance, please refer to Figure 11, Figure 11 is the schematic diagram of a radio frequency signal processing equipment 1100 of the embodiment of the present invention.Radio frequency signal processing equipment 1100 is an execution mode of the radio frequency signal processing equipment 700 of the radio frequency signal processing equipment 100 of Fig. 1 or Fig. 7.Radio frequency signal processing equipment 1100 includes a signal generator module 1112, an attenuation module 1114 and a handover module 1116.Signal generator module 1112 is used for producing radiofrequency signal RF_sig, and attenuation module 1114 is comprised of resistance R 1～R3, is used for the deamplification energy.handover module 1116 is coupled to signal feed-in assembly (as 110,710 etc.), the capacitive sensing assembly is (as 114,714 etc.), signal generator module 1112 and attenuation module 1114, it comprises switch SW1, SW2, be used at the induction of the capacitive sensing assembly CAP_rst environment capacitance during greater than a preset value that shows particular range as a result, attenuation module 1114 is connected between signal generator module 1112 and signal feed-in assembly, make the radiofrequency signal that signal generator module 1112 is exported be sent to signal feed-in assembly after attenuation module 1114 damping capacities, otherwise, when the induction of the capacitive sensing assembly CAP_rst environment capacitance during not greater than preset value that shows particular range as a result, signal generator module 1112 is connected directly to signal feed-in assembly, makes the radiofrequency signal that signal generator module 1112 is exported directly be sent to signal feed-in assembly.Thus, when CAP_rst showed human body proximity as a result, radio frequency signal processing equipment 1100 can reduce the energy of radiofrequency signal RF_sig, to avoid affecting human body when induction; And when induction CAP_rst demonstration did not as a result have human body proximity, 1100 energy of keeping radiofrequency signal RF_sig of radio frequency signal processing equipment were to keep antenna efficiency.
In addition, please refer to Figure 12, Figure 12 is the schematic diagram of a radio frequency signal processing equipment 1200 of the embodiment of the present invention.Radio frequency signal processing equipment 1200 is an execution mode of the radio frequency signal processing equipment 700 of the radio frequency signal processing equipment 100 of Fig. 1 or Fig. 7.Radio frequency signal processing equipment 1200 includes a signal generator module 1212, a resistance 1214 and a handover module 1216.Signal generator module 1212 is used for producing radiofrequency signal RF_sig, and is electrically connected at resistance 1214 and signal feed-in assembly (as 110,710 etc.).Handover module 1216 is coupled to systematically end, capacitive sensing assembly (as 114,714 etc.) and resistance 1214, be used at the induction of the capacitive sensing assembly CAP_rst environment capacitance during greater than a preset value that shows particular range as a result, conducting resistance 1214 is to the systematically connection of end, the radiofrequency signal that signal generator module 1212 is exported is partly held with branching to, thereby reduce the energy of the radiofrequency signal RF_sig that is sent to signal feed-in assembly; Otherwise, when the induction of the capacitive sensing assembly CAP_rst environment capacitance during not greater than preset value that shows particular range as a result, cut off resistance 1214 to the systematically connection of end, make the radiofrequency signal that signal generator module 1212 is exported directly be sent to signal feed-in assembly, thereby keep the energy of the radiofrequency signal RF_sig that is sent to signal feed-in assembly.Thus, when CAP_rst showed human body proximity as a result, radio frequency signal processing equipment 1200 can reduce the energy of radiofrequency signal RF_sig, to avoid affecting human body when induction; And when induction CAP_rst demonstration did not as a result have human body proximity, 1200 energy of keeping radiofrequency signal RF_sig of radio frequency signal processing equipment were to keep antenna efficiency.
In addition, about handover module 1116 in radio frequency signal processing equipment 1100 and 1200,1216 supply power mode, DC power supply can be embedded in radiofrequency signal RF_sig, DC power supply is taken out and is supplied to handover module 1116,1216 by filter, shunt circuit etc. again, this should be technology well known in the art.
On the other hand, in the aforementioned embodiment, capacitive sensing assembly 114,214,314,414,514,614,714,814,914,1014 is used for responding to the environment capacitance of particular range, and its implementation is not limit to some extent, can suitably adjust in response to system requirements.For instance, please refer to Figure 13, Figure 13 is the schematic diagram of a capacitive sensing assembly 1300 of the embodiment of the present invention.Capacitive sensing assembly 1300 can replace or realize the capacitive sensing assembly 114,214,314,414,514,614,714,814,914,1014 in previous embodiment, and it includes a judging unit 1302 and one capacitor C _ INT.Judging unit 1302 connects radiant body (as radiant body 108,208,308,408,508,608,708,808,908,1008) by a pin PIN_Sensing, whether the voltage that is used for detecting PIN_Sensing reaches critical voltage value V_STEP, reach the needed charging times of critical voltage value according to the voltage of PIN_Sensing again and whether surmount N_CHARGE+N_BARRIER, judged whether that foreign object is close, thereby CAP_rst is as a result responded in output.Wherein, critical voltage value V_STEP represents that capacitor C _ INT completes the critical voltage value of charging to pin PIN_Sensing; Charging times N_CHARGE represents that capacitor C _ INT charges to pin PIN_Sensing, makes the voltage of pin PIN_Sensing reach the required charging times of critical voltage value V_STEP when close without foreign object; Barrier charging times N_BARRIER is the misoperation that causes for fear of the environment slight variations, the barrier charging times of adding for charging times N_CHARGE, and to surmount the N_CHARGE+N_BARRIER foreign object that can judge rightly close when charging times.
Specifically, pin PIN_Sensing (or radiant body) can equivalence be a capacitor C _ Sensing to ground to ground; Wherein, should be noted, capacitor C _ Sensing is an equivalent electric capacity, and it is not present in entity structure, yet the function mode for explanation capacitive sensing assembly 1300 still is illustrated in Figure 13.When close without foreign object the time, capacitor C _ INT can reach the needed charging times of critical voltage value V_STEP to capacitor C _ Sensing charging and be charging times N_CHARGE; In other words, charging times N_CHARGE can be used as foreign object near the foundation of judgement, and barrier charging times N_BARRIER additionally considers the impact that the environment slight variations causes.Therefore, when foreign object near and when making capacitor C _ INT charge to the needed charging times of critical voltage value V_STEP and surmount N_CHARGE+N_BARRIER pin PIN_Sensing, the judging unit 1302 close event of foreign object that can judge rightly occurs, thus induction corresponding to output CAP_rst (as logical one) as a result; Otherwise, when close without foreign object, perhaps when foreign object near when but capacitor C _ INT charges to the needed charging times of critical voltage value V_STEP and does not surmount N_CHARGE+N_BARRIER pin PIN_Sensing, the close event of expression foreign object is not triggered, and judging unit 1302 is exported corresponding induction CAP_rst (as logical zero) as a result.
Further, as shown in figure 13, human body or hand can equivalence be over the ground a capacitor C _ HAND for earthing potential, therefore when human body or the close capacitive sensing assembly of hand, the capacitance of pin PIN_Sensing will increase because of Capacitance parallel connection, that is C_Sensing+C_HAND, the capacitance increase will make capacitor C _ INT charge to the needed charging times of critical voltage value V STEP to pin PIN_Sensing to be increased.By this, when charging times surmounted N_CHARGE+N_BARRIER, the foreign object that can judge rightly occured near event, and in information (as logical one) corresponding to induction CAP_rst demonstration as a result, expression human body detected or hand is close.
Should be noted, Figure 13 explanation is applicable to an implementation of capacitive sensing assembly of the present invention, and those of ordinary skill in the art should suitably adjust in response to system requirements, is not limited to this.
In known technology, reduce to disturb and keep two kinds of demands of antenna performance in order to take into account, usually utilize the capacitance variations near inductor sensing human body proximity, thus the judgement human body near situation.Yet, need comprise receiver or the sensor with metal material near inductor, the receiver that this adds or sensor can exert an influence to antenna efficiency, cause working band to narrow down.By contrast, the present invention need not increase receiver or sensor, but utilizes existing radiant body to carry out the induction of environment capacitance.Thus, can avoid affecting the radiation efficiency of antenna, the more important thing is, for the different communication systems with close bandwidth requirements, only need the design single antenna to get final product, thereby can reduce design and production cost, and be conducive to part management.
In sum, the present invention utilizes the environment capacitance of the radiant body induction particular range of antenna, and adjust according to this wireless energy signal, thereby can avoid affecting the radiation efficiency of antenna, simultaneously, only needing the design single antenna is applicable different communication systems with close bandwidth requirements, can further reduce design and production cost, and be conducive to part management.
The above is only preferred embodiment of the present invention, and the every scope of claims is done according to the present invention equivalent variations and modification all should belong to covering scope of the present invention.
Claims (22)
1. radio-frequency unit, this radio-frequency unit is used for a radio communication device, and this radio-frequency unit comprises:
One grounding assembly, this grounding assembly is used to provide ground connection;
One antenna, this antenna comprises:
One radiant body;
One signal feed-in assembly, this signal feed-in assembly is coupled to this radiant body, is used for a radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And
One earth terminal, this earth terminal is used for coupling this grounding assembly;
One capacitive sensing assembly, this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, an environment capacitance of induction one particular range; And
At least one electric capacity, this at least one electric capacity are electrically connected between this earth terminal and this grounding assembly of this antenna, are used for blocking this earth terminal to a direct current signal path of this grounding assembly.
2. radio-frequency unit as claimed in claim 1, wherein this antenna is a planar inverted-F antenna, a bipolar antenna, a collapsible dipole antenna or a slot antenna.
3. radio-frequency unit as claimed in claim 1, wherein this signal feed-in assembly is coupled to this radiant body by coupled modes.
4. radio-frequency unit as claimed in claim 1, wherein this signal feed-in assembly is coupled to this radiant body by the electric connection mode.
5. radio-frequency unit as claimed in claim 1, wherein this capacitive sensing assembly also is used for one of this environment capacitance is responded to the radio frequency signal processing equipment that result is sent to this radio communication device, this radio frequency signal processing equipment is responded to result according to this, adjusts the energy of this radiofrequency signal.
6. radio communication device, this radio communication device comprises:
One radio frequency signal processing equipment, this radio frequency signal processing equipment is used for producing a radiofrequency signal, and according to an induction result, adjusts the energy of this radiofrequency signal; And
One radio-frequency unit, this radio-frequency unit comprises:
One grounding assembly, this grounding assembly is used to provide ground connection;
One antenna, this antenna comprises:
One radiant body;
One signal feed-in assembly, this signal feed-in assembly is coupled to this radiant body, is used for this radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And
One earth terminal, this earth terminal is used for coupling this grounding assembly;
One capacitive sensing assembly, this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, and an environment capacitance of induction one particular range is to produce this induction result; And
At least one electric capacity, this at least one electric capacity are electrically connected between this earth terminal and this grounding assembly of this antenna, are used for blocking this earth terminal to a direct current signal path of this grounding assembly.
7. radio communication device as claimed in claim 6, wherein this antenna is a unipole antenna, a loop antenna or a plate aerial.
8. radio communication device as claimed in claim 6, wherein this signal feed-in assembly is coupled to this radiant body by coupled modes.
9. radio communication device as claimed in claim 6, wherein this signal feed-in assembly is coupled to this radiant body by the electric connection mode.
10. radio communication device as claimed in claim 6, wherein this radio frequency signal processing equipment comprises:
One signal generator module, this signal generator module is used for producing this radiofrequency signal;
One attenuation module, this attenuation module are used for the deamplification energy; And
One handover module, this handover module is coupled to this signal feed-in assembly, this capacitive sensing assembly, this signal generator module and this attenuation module, be used for this environment capacitance that this induction result at this capacitive sensing assembly shows this particular range during greater than a preset value, this attenuation module is connected between this signal generator module and this signal feed-in assembly, makes this radiofrequency signal be sent to this signal feed-in assembly after this attenuation module damping capacity.
11. radio communication device as claimed in claim 6, wherein this radio frequency signal processing equipment comprises:
One signal generator module, this signal generator module are coupled to this signal feed-in assembly, are used for producing this radiofrequency signal;
One resistance, this resistance are coupled between this signal generator module and this signal feed-in assembly; And
One handover module, this handover module is coupled to this capacitive sensing assembly, this resistance and a ground end, be used for this environment capacitance that this induction result at this capacitive sensing assembly shows this particular range during greater than a preset value, this resistance of conducting makes this radiofrequency signal partly branch to this ground end to the connection of this ground end.
12. a radio-frequency unit, this radio-frequency unit is used for a radio communication device, and this radio-frequency unit comprises:
One antenna, this antenna comprises:
One radiant body; And
One signal feed-in assembly, this signal feed-in assembly is used for a radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And
One capacitive sensing assembly, this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, an environment capacitance of induction one particular range;
Wherein, this signal feed-in assembly or this capacitive sensing assembly are blocked the direct current signal path between this radiant body to one ground end.
13. radio-frequency unit as claimed in claim 12, wherein this antenna is a unipole antenna, a loop antenna or a plate aerial.
14. radio-frequency unit as claimed in claim 12, wherein this signal feed-in assembly is coupled to this radiant body by coupled modes.
15. radio-frequency unit as claimed in claim 12, wherein this signal feed-in assembly is coupled to this radiant body by the electric connection mode.
16. radio-frequency unit as claimed in claim 12, wherein this capacitive sensing assembly also is used for one of this environment capacitance is responded to the radio frequency signal processing equipment that result is sent to this radio communication device, this radio frequency signal processing equipment is responded to result according to this, adjusts the energy of this radiofrequency signal.
17. a radio communication device, this radio communication device comprises:
One radio frequency signal processing equipment, this radio frequency signal processing equipment is used for producing a radiofrequency signal, and according to an induction result, adjusts the energy of this radiofrequency signal; And
One radio-frequency unit, this radio-frequency unit comprises:
One antenna, this antenna comprises:
One radiant body; And
One signal feed-in assembly, this signal feed-in assembly is used for this radiofrequency signal is sent to this radiant body, to launch this radiofrequency signal by this radiant body; And
One capacitive sensing assembly, this capacitive sensing assembly is electrically connected at this radiant body of this antenna, is used for by this radiant body, and an environment capacitance of induction one particular range is to produce this induction result;
Wherein, this signal feed-in assembly or this capacitive sensing assembly are blocked the direct current signal path between this radiant body to one ground end.
18. radio communication device as claimed in claim 17, wherein this antenna is a unipole antenna, a loop antenna or a plate aerial.
19. radio communication device as claimed in claim 17, wherein this signal feed-in assembly is coupled to this radiant body by coupled modes.
20. radio communication device as claimed in claim 17, wherein this signal feed-in assembly is coupled to this radiant body by the electric connection mode.
21. radio communication device as claimed in claim 17, wherein this radio frequency signal processing equipment comprises:
One signal generator module, this signal generator module is used for producing this radiofrequency signal;
One attenuation module, this attenuation module are used for the deamplification energy; And
One handover module, this handover module is coupled to this signal feed-in assembly, this capacitive sensing assembly, this signal generator module and this attenuation module, be used for this environment capacitance that this induction result at this capacitive sensing assembly shows this particular range during greater than a preset value, this attenuation module is connected between this signal generator module and this signal feed-in assembly, makes this radiofrequency signal be sent to this signal feed-in assembly after this attenuation module damping capacity.
22. radio communication device as claimed in claim 17, wherein this radio frequency signal processing equipment comprises:
One signal generator module, this signal generator module are coupled to this signal feed-in assembly, are used for producing this radiofrequency signal;
One resistance, this resistance are coupled between this signal generator module and this signal feed-in assembly; And
One handover module, this handover module is coupled to this capacitive sensing assembly, this resistance and a ground end, be used for this environment capacitance that this induction result at this capacitive sensing assembly shows this particular range during greater than a preset value, this resistance of conducting makes this radiofrequency signal partly branch to this ground end to the connection of this ground end.
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