CN1981451A - Electronic apparatus and wireless communication terminal - Google Patents
Electronic apparatus and wireless communication terminal Download PDFInfo
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- CN1981451A CN1981451A CNA2005800225220A CN200580022522A CN1981451A CN 1981451 A CN1981451 A CN 1981451A CN A2005800225220 A CNA2005800225220 A CN A2005800225220A CN 200580022522 A CN200580022522 A CN 200580022522A CN 1981451 A CN1981451 A CN 1981451A
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Abstract
In an electronic apparatus which is equipped with a first transmission unit for performing a first communication by an electromagnetic wave; a second transmission unit for performing a second communication by an electromagnetic wave; and a reception unit for receiving a signal transmitted from the second transmission unit, the electronic apparatus is comprised of an antenna arranged by a radiator having a size which is smaller than 1/(2p) of a wavelength of a use electromagnetic wave, which is connected to at least the second transmission unit and the reception unit.
Description
Technical field
The present invention relates to a kind of electronic installation and wireless communication terminal, they comprise such as the display element in the portable phone etc. and the element of image-forming component, and also are equipped with communication function, and these elements require high speed data transfer simultaneously.
Background technology
Recently, when the function that portable phone, notebook computer, digital camera etc. have significantly improves, to being built in display element and image-forming component strong request high-resolution and the high accuracy in these electronic equipments, make the structure of these electronic equipments become more complicated.Specifically, strong request portable phone miniaturization, in light weight and cost is low, and require it under low-power consumption, to work, require built-in camera function in these portable phones simultaneously, and require the size of the display unit of portable phone to increase.For the shell mechanism of these portable phones, the main folded form shell that is called as " renovating (clam shell) type shell " and " flip (flip) type shell " that adopts.
At present, in the electronic installation that comprises these display elements and image-forming component, high-resolution, large-sized display unit are made in strong request, in addition, also require to make these electronic equipments compact and in light weight.In response to these demands, very possible is is divided into a plurality of daughter boards with the detail assembly panel of these electronic equipments.What have an opportunity very much in this case, is that electronic circuit is split up into display part side and control side.In this case, must increase the length that is used for CPU is connected to the distribution of display element or image-forming component.Owing to increased the resolution of display element,, made that the electrical connection between these electronic components becomes difficult gradually so increased frequency by the signal of these circuit transmission.
More particularly, in the flip-type structure, CPU is connected to display element or image-forming component via narrow hinge joint portion.Owing to increased the resolution of these display elements and image-forming component, also increased the data volume of transmission/reception between these two plates, the feasible high speed data transfer technology that requires.In order to address this problem, as high speed data transmission system, for example, proposed such as adopting LVDS (low voltage differential command) to connect the technological thought (Japan Patent No.3086456 (the 44th hurdle), and Japan Patent No.3330359 (the 46th hurdle)) of display part or image-forming component.In addition, owing to above-mentioned LVDS technological thought can't address this problem fully, so Japan Patent No.3349426 and Japan Patent No.3349490 have proposed new method.
On the other hand, along with major progress appears in semiconductor fabrication, have following trend: for SOC (system on a chip) (system-on-chip), integrated level obviously improves, and therefore all semiconductor circuits that can be contained in the single chip are installed on this single semiconductor chip.Therefore, be used for semiconductor chip is connected to the obviously increase of sum of the pin of external circuit, and surpass a hundreds of connection pin sometimes.On the other hand, along with the operating frequency of semiconductor circuit increases similarly, be used for the conventional method of attachment that semiconductor circuit is connected to external unit may being caused the problem of high frequency characteristics via the lead-in wire bonding, and may cause almost can not be between semiconductor circuit and external unit another problem of transmission/received signal.For this problem, some research reports have been made, wherein, by wireless mode semiconductor chip is interconnected, perhaps circuit block is interconnected by the wireless method among the 161st page of the Japanese magazine " NIKKEI MICRODEVICE ", JP-A-10-256478, JP-A-2000-124406, JP-A-2000-68904 and the JP-A-2003-101320 that utilize in December, 2003 distribution.
Yet the problem for the screen sizes of nearest display part even carried out these technological thoughts, also can't obtain enough satisfactory performance.In other words, in such as the small-signal serial transmission of LVDS operation, require very fine design and adjusting, to realize enough gratifying noise resistance characteristic (anti-interference characteristic and can avoid applying the characteristic of interference).In the LVDS technology, because the amplitude of signal is little, so digital IC must Analog signals.Therefore, the problem that exists power consumption to increase.In addition, in order to send signal accurately, in the LVDS technology, require the impedance termination of matched well.Yet, exist a large amount of holding wires to require impedance termination, and transfer impedance is very low, for example 100 ohm.Therefore, have another problem, promptly the electric energy that consumes in these terminal resistances becomes the value of not allowing, promptly becomes very high.
In addition, at distribution through in this case such as the movable part of hinge joint portion, because characteristic impedance changes with the degree of crook of these movable parts, thus the phenomenon of impedance mismatching according to circumstances may appear, thus may cause Signal Degrade owing to the reflection at bend place.As a result, there is following other problems, that is, and the limited speed of data to be transmitted, and/or limited installation method and arrangement of components.
In addition, obvious from foregoing description, owing to amount to tens signal line via the sum of the signal of hinge joint portion transmission/reception, and can't use formation distribution onboard, so can flexible board be interconnected by connector.Have following shortcoming: adopt this flexible board and utilize this connector to connect and cause expensively, in addition, connection reliability is low.
In addition, the increase of the required distribution of high speed transmission data requires to be used for the physical space of these distributions.Obviously, design of electronic devices is very limited.
In addition, when by utilizing long distribution high-speed transfer so during lot of data,, then may cause electromagnetic interference to other electronic equipments or self electronic equipment if increase from the electromagnetic field of holding wire radiation.Transmitted operating provision under the situation of the wave amplitude level of reception signal terminal (amplitude level) at signal,, still still can't reduce the wave amplitude level of signal even guaranteed sufficiently high quality at the reception signal terminal place by the normal signal line.In other words, can't carry out EMI satisfactorily and measure, make this may cause design of electronic devices limited, and may cause the cost of these electronic equipments to increase.In addition, owing to drive electronic circuit on the transmitter side,, make to necessarily require extra energy to come transmission signals so driven the load on the reception signal terminal and the stray capacitance (stray capacitance) of circuit simultaneously.That is to say that this may increase power consumption.
If adopt conventional wireless communication technology with executive communication between each electronic circuit piece and integrated circuit, and utilize electromagnetic wireless data transmission technology to carry out data transfer operation in the part that can't form distribution by employing, then can address these problems fully.In conjunction with above-mentioned conventional wireless communication technology, pay close attention to disclosed technological thought among the 161st page of Japanese magazine " NIKKEIMICRODEVICE ", JP-A-10-256478, JP-A-2000-124406, JP-A-2000-68904 and the JP-A-2003-101320 that issues in December, 2003.
Yet, in order to implement the wireless technology thought of described routine in the data transfer operation in electronic equipment, to compare with utilizing lead transmission data conditions, its mechanism is very complicated, and may almost can't carry out its actual installation.Specifically, in portable telephone terminal, (that is, the main purpose of portable telephone terminal the power of) transmitter is high, may cause very large disturbance to the wireless connections that are based upon in the same electronic equipment (portable telephone terminal) thereby send signal for telephony feature.As obvious from the above description, for the radio communication of in same electronic equipment, carrying out, only limit to use low level electromagnetic wave, this can not cause being subjected to the restriction object of restrictions such as Japanese electromagnetic wave control method.In fact, the difference of these signal levels reaches 80dB.On the contrary, have following possibility: the signal that is used for connecting internal unit is blended into telephone receiver as noise, and it is brought interference, for example, may reduce the sensitivity of these receivers.At the problems referred to above, these routine techniquess all do not disclose effective solution.
In addition, when carrying out above-mentioned conventional wireless technology, the antenna that is used for internally connecting electronic equipment becomes a very problem of difficulty.Above-mentioned Japanese patent gazette 5 to 8 is not all described any effective solution.For example, Japanese patent gazette 6 has been described on integrated circuit and have been formed length and equal 1/4 the antenna that frequency is the electromagnetic wavelength of 1.5GHz.Yet frequency is that this electromagnetic wavelength of 1.5GHz equals 20cm, is 1/4 wavelength (that is this antenna 5cm), thereby in fact be difficult to form antenna length on integrated circuit.In addition, Japanese patent gazette 7 and 8 has been described following structure, promptly forms dielectric film on semiconductor chip, and the planar antenna radiator is arranged on this dielectric film on the semiconductor chip.Yet those of ordinary skill will be readily appreciated that the following fact.That is, because this thickness is substantially equal to be formed on the thickness of the dielectric film on the semiconductor chip, causing can't be effectively from being arranged on the antenna radiator radiated electromagnetic wave on the dielectric film.
In addition, in the electronic equipment in point-blank (point-blank) scope during executive communication, not only must be based on the far range of using the proper communication circuit, and must consider electromagnetic wave propagation based near the concrete propagation characteristic the antenna.
In order to illustrate this problem, Benq is in the emulation of routine techniques execution below with reference to accompanying drawings.
Figure 11 is the figure that disposes the portable telephone terminal of flip structure, that is, to the emulation of the portable telephone terminal that is provided with display part unit 701 (display unit is installed on it) and main unit 702 (baseband processor and input unit (keyboard) are installed on it).Can use line X-X ' folding although show body unit 701 and main unit 702 as shown in the figure, (that is, under normal condition) execution emulation under the state of opening in these unit 701 and 702 for axle.
In this portable telephone terminal model, in order to send with antenna 703 and antenna for receiving 704 by utilizing electromagnetic wave on display unit, data presented to send to demonstration body unit 701, being provided with respectively thereon from main unit 702.In addition, when the transmission of portable phone/antenna for receiving 705 is set, under normal condition, present electric energy via coaxial cable on showing body unit 701 from main unit 702.In the figure, for the ease of emulation, in these antenna any is treated to unipole antenna.Under the practical embodiments pattern, the low clearance antenna of necessary selection such as inversed F type antenna is as antenna 703 and 704.Yet, can expect that the simulation result of two kinds of antenna situations does not have very big-difference.In addition, the hypothesis portable phone is the electromagnetic wave of 2GHz (it is used in the third generation portable telephone system) with antenna 705 transmission/receive frequency ranges below, and it is the electromagnetic wave of 5GHz that internal unit communication is adopted frequency ranges with antenna 703 and 704, and to adopt length be 37.5mm and 15mm and be that the cylinder of 1mm is as radiator corresponding to 1/4 wavelength, diameter.
Figure 12 is illustrated in internal unit communication is set to port one, internal unit communication is set to port 2 and phone is set under the situation of port 3 the typical S parameter of s-matrix with antenna 705 with reception antenna 704 with transmitting antenna 703.
In Figure 12, equipment for communication transmitting antenna 703 is " S to the energy ratio of reception antenna 704 transmission internally
21", and be " S from portable phone antenna 705 to internal unit communication with the energy ratio of reception antenna 704 transmission
23".Under the frequency that from this figure, is appreciated that the 5GHz that in internal unit communication, uses, ratio " S
21" be approximately-16dB, and under the frequency of the 2GHz of portable phone, ratio " S
23" be-25dB.
In other words, internal unit communication is communicated by letter at internal unit with the transmitted power of antenna 705 with portable phone with the transmitted power of transmitting antenna 703 and is directly reflected into DU than (ideal/imperfect ratio) with the level in the reception antenna 704 (level) difference.The transmitted power of portable phone is up to 23dBm, in addition, based on the highest transmitted power at the non-unlicensed radio station of Japanese electromagnetic wave control method corresponding to by the EIRP conversion-64.3dBm.According to above-mentioned emulation, two signals appear at internal unit communication with antenna 704 places with the high level difference of about 80dB (23-(64.3)-(16-25)=78.3).
With in the receiving element, need be used to remove the filter apparatus of this undesirable signal in internal unit communication.Yet under actual conditions, the filter that almost is difficult to remove this high level difference is installed on this receiving element.Symbol " S
13" represent to send to the energy ratio of internal unit communication with transmitting antenna 703 from portable phone with antenna 705.Because two antennas are all corresponding to transmitting antenna, this energy is than " S
13" can not bring problem.Yet, for example, in being equipped with the portable telephone terminal of image-forming component (for example, in being equipped with the portable phone of camera), show that with being installed in the view data that the above-mentioned image-forming component on the body unit 701 obtains sends under the situation of main unit 702, internal unit communication is used as antenna for receiving with antenna 703, thereby this energy is than " S
13" value with for referencial use.Should also be noted that because s-matrix meets symmetrical matrix, so S
31=S
13In this case, condition is strict more, thereby the DU ratio reaches-90dB.
Therefore, the above-mentioned all kinds of problems of the present invention to solve between each circuit block that conventional electrical equipment adopts at a high speed and to take place during according to the wireless mode transferring large number of data are proposed, specifically, solution exists the disturbance elimination under the situation of strong electromagnetic wave oscillation source and the problem of antenna size in self electronic equipment, this has constituted the main purpose that electronic equipment had, therefore, the purpose of this invention is to provide the defective that to eliminate the routine data transmission system and restriction and can low cost and high reliability electronic installation and the wireless communication terminal made.
Summary of the invention
In order to address the above problem, electronic installation according to the present invention is characterised in that this electronic installation is equipped with at least as lower unit: first transmitting element, and it is used to utilize electromagnetic wave to carry out first communication; Second transmitting element, it is used to utilize electromagnetic wave to carry out second communication; And receiving element, it is used to receive the signal that sends from described second transmitting element; Wherein, described electronic installation comprises antenna, and in this antenna, the diameter of ball that comprises radiator is less than 1/ (2 π) of the electromagnetic wavelength that uses in described second transmitting element or described receiving element.
According to above-mentioned structure, receive the signal that sends from second transmitting element by the receiving element in the same electronic equipment.If these send and receiving element is used for high-speed transfer mass data in electronic equipment, then, operate all kinds of general issues that cause so can solve by high speed and mass data transmission owing to when utilizing airspace (air space), carry out data transfer operation by electromagnetic wave as medium.In addition, owing to adopt the antenna that is known as " small size antenna " as the antenna that uses in these transmissions and receiving element, so its frequency band is a narrow-band, and these small size antennas show strong frequency selective characteristic.Therefore, can reduce from the interference of the transmission signal of first transmitting element transmission.In addition, owing to do antenna compact, so its so-called " close region " is very narrow.As a result, locate, also can come the modelled signal line according to easy mode even these small size antennas are arranged in narrow place (for example, the space in the same equipment).
In addition, electronic installation according to the present invention is characterised in that antenna is made of radiator; And be provided with reactance component, be used to eliminate the reactive component of described radiator.
According to above-mentioned structure, owing to be provided with the described reactance component that can eliminate the reactive component that described antenna has, thus can make high performance antenna, and can obtain excellent radiation efficiency.
In addition, electronic installation according to the present invention is characterised in that the partial circuit of described first transmitting element, described second transmitting element or described receiving element or whole circuits built are on semiconductor integrated circuit; And, eliminate the part or all of reactive component of the described radiator of described antenna by the reactive component that distribution had on the described semiconductor integrated circuit and from the reactive component that distribution had of described semiconductor integrated circuit up to the described radiator qualification of described antenna.
According to said structure, being used in the electronic equipment sent/transmitting element of received signal and the integrated circuit that receiving element is formed on the described electronic equipment of formation simultaneously, make can do described electronic equipment compact and cost low, in addition, can also make this electronic equipment in high reliability ground.In addition, owing to can compensate the part of the reactive component that antenna has by the spuious key element that distribution had (stray element) that limits up to antenna from semiconductor integrated circuit, so this electronic equipment can be eliminated the adverse effect that is caused by spuious key element (for example, the inductance of the bonding wire in the semiconductor integrated circuit) that constitutes general issues.
In addition, electronic installation according to the present invention is characterised in that this electronic installation is equipped with at least as lower unit: first transmitting element, and it is used to utilize electromagnetic wave to carry out first communication; Second transmitting element, it is used to utilize electromagnetic wave to carry out second communication; And receiving element, it is used to receive the signal that sends from described second transmitting element; Wherein, described electronic installation comprises: antenna, and in this antenna, the diameter of ball that comprises radiator is less than 1/ (2 π) of the electromagnetic wavelength that uses in described second transmitting element or described receiving element; Apparatus for evaluating, it is used to assess the accepting state of described receiving element; Control device, it is used to control the electromagnetic frequency that is sent by described second transmitting element; And feedback device, its assessment result that is used for being made by described apparatus for evaluating feeds back to described control device.
According to above-mentioned structure of the present invention, receive the signal that sends from second transmitting element by the receiving element in the same electronic equipment.If these send and receiving element is used for high-speed transfer mass data in electronic equipment, then, operate all kinds of general issues that cause so can solve by high speed and mass data transmission owing to when utilizing airspace, carry out data transfer operation by electromagnetic wave as medium.In addition, owing to adopt the antenna that is known as " small size antenna " as the antenna that uses in these transmissions and receiving element, so its frequency band is a narrow-band, and these small size antennas show strong frequency selective characteristic.Therefore, can reduce from the interference of the transmission signal of first transmitting element transmission.In addition, owing to do antenna compact, so its so-called " close region " is very narrow.As a result, locate, also can come the modelled signal line according to easy mode even these compact antennas are arranged on narrow place (for example, the space in the same equipment).Because this compact aerial has strong frequency selective characteristic, so this compact aerial has high sensitivity for the fluctuation of circuit manufacturing operation and the variation of peripheral state.Yet, owing to electronic installation of the present invention is equipped with feedback device and can be controlled as continuous operation under optimum frequency, so can remove the unstable key element that causes by this factor.
In addition, electronic installation according to the present invention is characterised in that being shaped as of the described radiator of described antenna is linear.
According to above-mentioned structure of the present invention, in according to easy mode designing antenna, the frequency characteristic of described antenna is in the narrow-band, thereby can has strong frequency selective characteristic.
In addition, electronic installation according to the present invention is characterised in that the described radiator of described antenna is made of the printed patterns that is formed on the printed panel.
According to above-mentioned structure of the present invention, antenna and wiring pattern can be formed in combination on integrated circuit, and can simplify the installation steps of antenna.In addition, can when improving the reliability of communication equipment, do this communication equipment compact and cost low.
In addition, wireless communication terminal according to the present invention is characterised in that this wireless communication terminal comprises: first outer cover unit; Second outer cover unit; Linkage unit, it is used for according to the variable mode of relation of the position between described first outer cover unit and described second outer cover unit described first outer cover unit and described second outer cover unit being coupled together; The external wireless communication antenna, it is installed on described first outer cover unit or described second outer cover unit; The external wireless communication control unit, it is installed on described first outer cover unit, is mainly used in the external wireless communication that control is carried out with antenna by described external wireless communication; Display unit, it is installed on described second outer cover unit; The first internal radio communication control unit, it is installed on described first outer cover unit, is used to be controlled at the internal radio communication of carrying out between described first outer cover unit and described second outer cover unit; The second internal radio communication control unit, it is installed on described second outer cover unit, is used to be controlled at the internal radio communication of carrying out between described first outer cover unit and described second outer cover unit; The first internal radio communication antenna, it is installed on described first outer cover unit, and wherein, the diameter of ball that comprises radiator is less than 1/ (2 π) of the electromagnetic wavelength that uses in internal radio communication; The second internal radio communication antenna, it is installed on described second outer cover unit, and wherein, the diameter of described ball that comprises described radiator is less than 1/ (2 π) of the electromagnetic wavelength that uses in internal radio communication; And the internal wireless timing control unit, it is used for based on regularly being controlled at electromagnetic the transmissions timing that described internal radio communication sends via described external wireless communication with electromagnetic send of antenna transmission.
According to above-mentioned structure of the present invention, can make internal radio communication very narrow, and can improve frequency selective characteristic with the frequency range of antenna, can relax its directivity in addition.As a result, the interference between external wireless communication and the internal radio communication can be reduced, and interference can be reduced.Even in portable phone, adopt under the situation of flip structure, also can be according to the data transfer operation between the shell of wireless mode execution portable phone under stable state.Therefore, though and the high-resolution that is installed in the display unit on the portable phone increase accordingly under the situation in the data volume of transmission/reception between the shell, in the labyrinth that suppresses linkage unit, can avoid loaded down with trivial details installation steps.Therefore, can when suppressing cost rising aspect, more do portable phone compact and small and exquisite to high reliability; In addition, multiple function can be equipped with when the portability of portable phone does not reduce, can make the portable phone of large display screen, and portable phone.
Description of drawings
Fig. 1 is the stereogram that is used to represent the state that the flip-type portable phone that antenna is installed on it of the present invention is opened.
Fig. 2 is the stereogram that is used to represent the state of the flip-type portable phone closure that antenna is installed on it of the present invention.
Fig. 3 is the stereogram that is used to illustrate the outward appearance of the swing-type portable phone that antenna is installed on it of the present invention.
Fig. 4 is the figure that is used to illustrate the embodiment of the invention.
Fig. 5 is the figure that is used for describing in detail the antenna part of the embodiment of the invention.
Fig. 6 is the figure of effect that is used for describing the antenna part of the embodiment of the invention.
Fig. 7 is the figure that is used to represent from the field of very little current element radiation.
Fig. 8 is the block diagram that is used to describe the embodiment of the invention.
Fig. 9 is the figure that is used to illustrate another embodiment of the present invention.
Figure 10 is the figure that is used to illustrate further embodiment of this invention.
Figure 11 is the figure that is used to describe prior art.
Figure 12 is the figure that is used to describe prior art.
Embodiment
The specific embodiment of the present invention is described below with reference to accompanying drawings.
Fig. 1 is the stereogram that is used to represent the state that the flip-type portable phone that antenna is installed on it of the present invention is opened.Fig. 2 is the stereogram that is used to represent the state of the flip-type portable phone closure that antenna is installed on it of the present invention.
In Fig. 1 and Fig. 2, the surface of first outer cover unit 1 is provided with action button 4, and in addition, the lower limb of first outer cover unit 1 is provided with microphone 5.In addition, the top edge that the surface of second outer cover unit 2 is provided with display part 8, the second outer cover units 2 is provided with loud speaker 9, and external wireless communication antenna 6 is installed on the top edge of second outer cover unit 2.In this case, can communicate by letter by the signal of external wireless communication antenna 6 transmission/receptions with first outer cover unit 1 by coaxial cable.In addition, shown in label 6 ', external wireless communication can alternatively be installed in first outer cover unit 1 with antenna 6.
In addition, the outerplanar of second outer cover unit 2 is provided with display part 11 and image-forming component 12.Should also be noted that and for example can adopt LCD panel, organic EL plate or plasma display panel as display part 8 and 11.In addition, can adopt CCD or cmos sensor as image-forming component 12.In addition, in first outer cover unit 1 and second outer cover unit 2, be respectively arranged with the internal radio communication antenna 7 and 10 that is used between first outer cover unit 1 and second outer cover unit 2, carrying out internal radio communication.
Then, first outer cover unit 1 is connected to second outer cover unit 2 via hinge 3.Because second outer cover unit 2 is the fulcrum rotation with hinge 3, so second outer cover unit 2 may be folded on first outer cover unit 1.Then, when second outer cover unit 2 closes on first outer cover unit 1, can protect action buttons 4 by second outer cover unit 2, and can avoid when carrying portable phone, action button 4 being carried out misoperation.In addition, when second outer cover unit 2 when first outer cover unit 1 is opened, can when watching display part 8, operate action button 4; Can when using loud speaker 9 and microphone 5, carry out telephone communication; And can when being operated, action button 4 carry out imaging operation.
In this case, owing to adopted flip structure, so display part 8 can be arranged on the whole basically zone of second outer cover unit 2, and can under the situation of the portability that does not reduce portable phone, increase the size of display part 8, make and to improve visible characteristic.
In addition, because internal radio communication is separately positioned in first outer cover unit 1 and second outer cover unit 2 with antenna 7 and 10, so can carry out intercommunication and carry out data transfer operation between first outer cover unit 1 and second outer cover unit 2 with antenna 7 and 10 by utilizing internal radio communication.For example, by utilizing internal radio communication to carry out internal radio communication with antenna 7 and 10, to all send to second outer cover unit 2 with view data and the speech data that antenna 6 gets access in first outer cover unit 1 via external wireless communication, make can be on display part 8 display image, and from loud speaker 9 output voice.In addition, by adopting internal radio communication to carry out internal radio communication with antenna 7 and 10, the imaging data that image-forming component 12 can be obtained sends to first outer cover unit 1 from second outer cover unit 2, can with antenna 6 this imaging data be sent out to external unit by external wireless communication then.
Therefore, need not between first outer cover unit 1 and second outer cover unit 2, to transmit data, and be equipped with the flexible connection board of a plurality of pins no longer to pass hinge 3 by wired mode.The labyrinth that therefore, can suppress hinge 3; Can avoid loaded down with trivial details installation steps, can when suppressing cost rising aspect, more do portable phone compact and small and exquisite to high reliability; In addition, multiple function can be equipped with in the portability that does not reduce portable phone, can make portable phone, and portable phone with large display screen.
Fig. 3 is the stereogram of the outward appearance of the swing-type portable phone that antenna is installed on it of the present invention.
In Fig. 3, the surface of first outer cover unit 21 is provided with action button 24, and in addition, the lower limb of first outer cover unit 21 is provided with microphone 25.In addition, the top edge that the surface of second outer cover unit 22 is provided with display part 28, the second outer cover units 22 is provided with loud speaker 29, and external wireless communication antenna 26 is installed on the top edge of second outer cover unit 22.In this case, can communicate by letter by the signal of external wireless communication antenna 26 transmission/receptions with first outer cover unit 21 by coaxial cable.In addition, shown in label 26 ', external wireless communication can alternatively be installed in first outer cover unit 21 with antenna 26.
In addition, in first outer cover unit 21 and second outer cover unit 22, be respectively arranged with the internal radio communication antenna 27 and 30 that is used between first outer cover unit 21 and second outer cover unit 22, carrying out internal radio communication.
Then, first outer cover unit 21 is connected to second outer cover unit 22 via hinge 23.Because second outer cover unit 22 is that fulcrum horizontally rotates with hinge 23, so second outer cover unit 22 may be folded on first outer cover unit 21.In addition, second outer cover unit 22 can be removed from first outer cover unit 21.Then; because the mode that overlaps on first outer cover unit 21 according to this second outer cover unit 22 is provided with this second outer cover unit 22; so can protect action buttons 24 by second outer cover unit 22, and can avoid when carrying portable phone, action button 24 being carried out misoperation.In addition, horizontally rotate to remove, so can when watching display part 28, operate owing to second outer cover unit 22 action button 24 from first outer cover unit 21; And can when using loud speaker 29 and microphone 25, carry out telephone communication.
In this case, because internal radio communication is separately positioned in first outer cover unit 21 and second outer cover unit 22 with antenna 27 and 30, so can carry out intercommunication and carry out data transfer operation between first outer cover unit 21 and second outer cover unit 22 with antenna 27 and 30 by utilizing internal radio communication.For example, by utilizing internal radio communication to carry out internal radio communication with antenna 27 and 30, to all send to second outer cover unit 22 with view data and the speech data that antenna 26 (or 26 ') gets access in first outer cover unit 21 via external wireless communication, make can be on display part 28 display image, and can be from loud speaker 29 output voice.
Therefore, be equipped with the flexible connection board of a plurality of pins no longer to pass hinge 23.The labyrinth that therefore, can suppress hinge 23; Can avoid loaded down with trivial details installation steps, can when suppressing cost rising aspect, more do portable phone compact and small and exquisite to high reliability; In addition, multiple function can be equipped with in the portability of deterioration portable phone not, can make portable phone, and portable phone with large display screen.
Although it will also be appreciated that according to above-mentioned execution mode illustration portable phone, the present invention also can alternatively be applied to video camera, PDA (personal digital assistant), notebook personal computer etc.
Embodiment 1
Fig. 4 (A) is used to illustrate stereogram according to an embodiment of the invention, and Fig. 4 (B) is that embodiment among Fig. 4 (A) is along the sectional view by the planar interception of the straight line of arrow " X-Y " expression of comprising among Fig. 4 (A).
In Fig. 4, label 101 represents to be equipped with on it display part unit of liquid crystal display part and image-forming component, and this display part unit and display part drive circuit etc. are installed on the dielectric sheet 107 in combination.Label 102 expression main unit; And the input unit, the CPU of main unit 102, the telephony feature that are equipped with on dielectric sheet 108 such as keyboard are handled the required modulation/demodulation circuit of operation etc.By being installed in modulation circuit on the main unit 102 etc. the video data that produces in the main unit 102 is handled, afterwards, equipment for communication transmitting antenna 103 is an electromagnetic wave with treated video data radiation internally, then, receive the video data that is sent by internal unit communication with reception antenna 104.Handle to the received signal based on demodulation process operation by the receiving circuit that is arranged on the display unit 101, be video data with the conversion of signals that receives then, thereby on the display part that is arranged on the display unit 101, show the content of this video data.Label 105 expressions are used for the antenna of portable phone.Power to antenna 105 via coaxial cable by main unit 102.
The position relation of the antenna among Fig. 4 and the frequency of using thereof concern identical with the frequency of use with the position of the prior art shown in Figure 11.In addition, cover demonstration body unit 101 and the dielectric sheet 107 of main unit 102 and 108 the back side by conductor 106 as ground plane.In Fig. 4 (B), identical label 106 is shown two positions.This is because 106 expressions of identical label remain on the same components at equipotentiality place via hinge joint portion.In addition, although ground plane has covered the whole basically plane at the dielectric sheet back side, this figure makes for the purpose that is easy to carry out emulation.Under actual conditions, this ground plane is as the ground of circuit to be installed, and therefore, this ground plane is a complicated patterns.
Fig. 5 is used to illustrate in greater detail the figure of internal unit communication according to the present invention with send/receive antenna 103 and 104.Should be understood that to adopt and come structural elements in the presentation graphs 5 with label identical shown in Fig. 4.In this embodiment, for send/receive antenna 103 and 104 both, all adopting length is that 6.5mm and width are that the rectangular conductor of 1mm is as antenna radiator.Can construct this rectangular conductor according to the form of the conductive pattern of printed panel, this rectangular conductor serves as the part of circuit board, and owing to need not special construction and particular components such as inversed F type antenna, so aspect manufacturing process, have advantage.The size of this antenna be substantially equal to frequency of utilization (5GHz) wavelength (6cm) 1/10, and be shorter than or equal 1/ (2 π) of this wavelength, thereby be known as " small size antenna ".Should also be noted that symbol " π " is girth and its diameter ratio of circle.
In order to improve the radiation efficiency of two antennas, make the back side of radiator avoid ground plane.With transmitting antenna 103, be installed with the rectangular opening 109 that is of a size of 7 * 9.5mm for internal unit communication overleaf in the ground plane.In addition, internal unit communication is configured on the edge surface of plate with antenna 104, and forms notch on ground plane.Therefore should be noted in the discussion above that equally these antenna and assembly as just an example and shown in the example, can optionally change for the consideration of carrying out arrangement of components easily.When adopting point by the symbol among Fig. 5 " X " expression as distributing point, internal unit communication send/receive antenna 103 and 104 and ground plane on just in time present electric energy between the point below these antenna 103 and 104.
Fig. 6 represent when adopt internal unit communication with transmitting antenna 103 as port one, adopt internal unit communication with reception antenna 104 as port 2 and adopt portable phone with antenna during as port 3, carry out the result of calculation that the emulation of S parameter is obtained.Obvious as this result of calculation from Fig. 6, be under the 5GHz in frequency of utilization, equipment for communication transmitting antenna 103 arrives the energy of reception antenna 104 transmission than " S internally
21" be-16dB, and be under the 2GHz in frequency of utilization, from portable phone antenna 105 to internal unit communication with the energy of reception antenna 104 transmission than " S
23" be-49 dB.In other words, energy compares S
21With S
23Difference be reflected to internal unit communication and communicate by letter with the level difference in the reception antenna 104 at internal unit with the transmitted power of antenna 105 with the transmitted power of transmitting antenna 103 and portable phone, thereby can be with DU than improving 33dB.In order to carry out internal unit communication without a doubt, must further the DU ratio be improved 47dB.Yet the diffusion gain that obtains by filter and communication system etc. can prevent this interference effectively.This can make system design become easily, in addition, can significantly improve systematic function.
In general, the antenna with following size is known as " small size antenna ": this antenna can be contained in diameter and equal in the ball of 1/ (2 π) of wavelength.In the distance that records from the irradiation of electromagnetic waves source (it is less than or equal to 1/ (2 π) of wavelength), electrostatic field and induced field strength be in radiation field, and be known as reactance (reactive) radiation area.Observe when other terminal from this small size antenna, a terminal of this small size antenna is included in the reactance radiation area.In addition, becoming up to the phase difference of antenna terminal from center of antenna is less than or equal to 0.5 radian, and this is a radian " x " and the difference of sin x is less than or equal to 2% zone, and should also be similar to the regional corresponding of sin x with using " x " in the zone.In adopting the system of this small size antenna, be not known as the nearly radiation areas of Fresnel region (Fresnel area) basically, and design of communications circuit easily.When antenna was this small size antenna, radiation impedance was reactive, and had reduced the real part of radiation impedance.This means " Q " that improved radiation impedance, and frequency band is narrowed down.In addition, it is not strict that radiation directivity becomes, and be approximately 1.5 along the gain of greatest irradiation direction.
Fig. 7 is the figure that is used to represent from the field of very little current element radiation.
In Fig. 7, be regarded as being known as three component sums of radiation field, induction field and electrostatic field from the radiation field of very little current element radiation, these three components are with respect to the distance " r " and 1/r, 1/r of distance wave source
2And 1/r
3Directly proportional.When distance " r " be that (when symbol " K " was represented 2 π/λ), " Kr " equaled 1 to 1/K, thereby makes the big or small consistent with each other of each.When distance " r " during less than 1/K, to compare with radiation field, the intensity of induction field and electrostatic field accounts for leading.This zone is corresponding to the reactance radiation area.
At the radiator of antenna fully by the reactance radiation area under the included situation, that is, under the situation of diameter less than 1/K (that is, less than 1/ (2 π)) of the ball that comprises this radiator, the reactive component of this antenna accounts for leading, thereby has influenced the frequency range and the antenna efficiency thereof of this antenna largely.For example in following publication, described this phenomenon in detail:
Chu, L I. " Physical Limitations of omni-directional Antennas ", Journalof Applied Physics, 1948,19,1163 to 1175 pages.
McLean, J.S. " A Re-examinations of the Fundamental Limits on theRadiation Q of Electrically Small Antennas " IEEE trans.AntennasPropagation Vol 44,672 to 676 pages, 1996.
Embodiments of the invention have utilized this characteristic of small size antenna, by the size of antenna is set less than the mode of 1/ (2 π) that use electromagnetic wavelength according to the diameter of the ball of the radiator that comprises antenna, the reactive component that antenna has can be effectively utilized, and interference can also be eliminated by the frequency selective characteristic that enhancing antenna itself has.In addition, in small size antenna, because the directivity of having relaxed this small size antenna, so even under this position relation between transmitter side in having the complicated shell mechanism of so-called " cross-compound arrangement " and the receiver side, S
21It is smooth that characteristic also becomes, and can realize stable operation.For this complexity shell mechanism, in having the portable phone of flip structure, shell can use the straight line of being represented by " Z " among Fig. 4 (A) to be the axle rotation.
In this embodiment 1, carry out emulation based on the feasible interior size of ball that diameter can be contained in 1/ (3 π) of wavelength, then, this embodiment 1 expression can obtain excellent specific property.In addition, this size can alternatively be used in following situation: diameter can be accommodated in the ball of 1/5 π of wavelength.Under this alternative scenario, be suitable for being arranged on antenna on the chip or be arranged on the encapsulation in or the encapsulation on.Preferably, the lower limit of the size of antenna is chosen as live width more than or equal to distribution.
Fig. 8 is the block diagram that is used for representing according to the major part of the electronic circuit of the device of the embodiment of the invention.
In Fig. 8, CPU402 generates the video data that should be shown based on the information from portable phone circuit 406 and calculating acquisition, then this video data is recorded in the video memory 402.Liquid-crystal controller 403 is exported the video data 419 that is read then according to predefined procedure reading displayed video data 419 on display part from video memory 402 with vertical synchronizing signal 421 and horizontal-drive signal 420.Undertaken and go here and there conversion by 404 pairs of video datas of parallel/serial change-over circuit 419, then will through and the video data 419 of string conversion send to logical circuit 407.Synchronous circuit 405 generates targeting signal by receiving horizontal-drive signal 420 with vertical synchronizing signal 421.Adopt this targeting signal to set up synchronous that signal post needs, for example be used for the timing of synchronous detecting.Logical circuit 407 receptions are from the signal of parallel/serial change-over circuit 404 derivation and the signal of deriving from synchronous circuit 405, to generate the grouping of using in the radio communication (data), this grouped data is modulated based on the carrier frequency that generates by carrier oscillator 409 by modulator 408, then, send this modulated grouped data by transmitting antenna 410.This transmitting antenna 410 is corresponding to the transmitting antenna 103 of the internal unit communication shown in Fig. 4.The foregoing circuit element is installed on the demonstration body unit 101 among Fig. 4.Portable phone is installed on the display part unit (101 shown in Fig. 1) with antenna 427, and by utilizing coaxial cable to be connected to be arranged at the portable phone circuit 406 in the main unit 102.
Reception antenna 411 receives the electromagnetic wave signal that sends from transmitting antenna 410.Reception antenna 411 is corresponding to the reception antenna 104 of the internal unit communication shown in Fig. 4.Utilizing after 412 pairs of these signals of preamplifier amplify, utilizing band pass filter 413 to eliminate interference wave in the unnecessary frequency band from this through amplifying signal, then, this signal through filtering enters another synchronous circuit 414.Utilizable energy stops that enough this notch filter of special frequency band (for example, phone transmitter frequency band) substitutes band pass filter 413.Select as another kind, band pass filter 413 can be arranged on the prestage of preamplifier 412.Be arranged at band pass filter 413 under the situation of prestage of preamplifier 412, owing to before signal is transfused to preamplifier 412, removed interference wave, so can in the dynamic range of preamplifier 412, produce allowance.On the contrary, if band pass filter 413 is lossy, then the noise figure of preamplifier 412 is by deterioration.
Even under the arbitrary situation in these situations,,, make and easily to make system configuration so produced design capacity because transmitting antenna 410 and reception antenna 411 have been realized frequency selective characteristic.Synchronous circuit 414 detects the targeting signal that is included in the received signal grouping, and in conjunction with PLL415 generation carrying out required clock of demodulation operation and synchronization timing.In response to received signal, demodulator circuit 416 divides into groups to carry out demodulation to received signal by the output that utilizes synchronous circuit 414 and PLL 415.Another logical circuit 418 generates the transfer clock 425 of horizontal-drive signal 423, vertical synchronizing signal 424 and X driver by according to the timing at the video data 422 that comprises in the grouping according to demodulated packets.Then, logical circuit 418 outputs to horizontal-drive signal 423, vertical synchronizing signal 424 and transfer clock 425 respectively the liquid crystal driver that adopted among the liquid crystal display part LCD426 to carry out display operation.The foregoing circuit element is installed on the main unit 102 among Fig. 4.
For the frequency of oscillation of carrier oscillator 409, select can not cause the frequency of interfering and can not be subjected to the adverse effect of these electronic equipments to the original purpose (for example, radio receiver and portable phone) of utilizing electromagnetic electronic equipment.As described in this embodiment 1, if selected the frequency of utilization of about 5GHz, even then when sending the data of 100Mbps, shared scope also is about 200MHz.Therefore, usually, can use the portable phone of this embodiment 1 most possibly without a doubt.Obvious from Fig. 6, the energy of-3dB frequency band is than " S
21" corresponding to 400MHz.Therefore, even, enough allowances are arranged also in this frequency band by adopting this small size antenna to realize narrow-band.
Because adopted said structure,, in addition, can eliminate the following problem that significantly exposes owing to show the expansion of body so can video data be sent to display part according to wireless mode.That is, can cause these problems by carrying out the data transmission according to wired mode, for example, the restriction of power consumption, cloth line position, EMI control, guarantee reliability or the like.Specifically, though in same system, exist this can the extremely strong electromagnetic transmitter of radiation, also can under the situation of the adverse effect of not interfered, provide excellent system.
Embodiment 2
Fig. 9 is used for illustration for the figure of the formant of the conception of electronic equipment according to another embodiment of the present invention.
In Fig. 9, label 501 expressions are communicated by letter with the transmitting antenna 103 corresponding internal units among Fig. 4 and are used transmitting antenna.In addition, label 502 expressions are communicated by letter with the reception antenna 104 corresponding internal units among Fig. 4 and are used reception antenna.Because these antenna 501 is corresponding with small size antenna with 502, so the reactive component of radiation impedance is very big, and is expressed as " R respectively
1+ jX
1" and " R
2+ jX
2".Usually, in small size antenna, reactive component " X
1" and " X
2" be capacitive and have negative value.(they have makes these reactive components X under frequency of utilization by other employing inductance element 503 and 504
1And X
2Be zero value) offset these reactive components X
1And X
2Usually, because circuit layouts etc. have stray inductance, so these stray inductances may be included in the part of inductance element 503 and 504.
Can offset the stray reactance component that the efficient that makes custom circuit reduces in the manner described above, thus can implementation efficiency the system of higher and excellent performance.Label 508 expressions are used to import the input terminal from the signal of transmitter output circuit.Carrying out the impedance transformation operation by match circuit 506, is " R with the equivalent output impedance 507 according to this match circuit 506
1" mode set up matching condition.Should also be noted that match circuit 506 and inductance 503 all are to form by the transmitter output circuit of the integrated form of design under normal operation.Can be by considering to design inductance 503 such as the stray reactance component of distribution inductance.Label 505 expressions are when observing transmitter output from antenna side, as the current source of equivalent drive source.Although the real part " R of the radiation impedance of small size antenna
1" be very little value, but output impedance 507 also almost can not with this real part " R
1" unanimity.Yet this difficulty also is useful.Provide its reason below.If real part X
1Mate fully with output impedance 507, then the efficient of transmitter becomes very high, and radiation field becomes very strong, makes electromagenetic wave radiation become parasitic radiation (spurious radiation) outside system.Owing to make this circuit part be in non-matching status, so can avoid over-radiation.
In addition, because output impedance may make the Q of antenna range reduce, so can avoid causing transmit frequency range to become narrow owing to the compact size of antenna.In addition, for reception antenna 502, inductance 504 is set in addition as the reactance component that can offset the reactive component of this reception antenna.Label 510 expression match circuits are according to making its input impedance 509 of seeing from antenna side under frequency of utilization be " R
2" mode design this input impedance 509.Design match circuit 510 by the characteristic of considering stray reactance and input filter.The output signal of match circuit 510 is sent to internal unit communication receiving element 511.
All these circuit elements except antenna radiator are integrated on the semiconductor integrated circuit so that compactness and cost are low.In this case, although make and conventionally can't realize enough excellent characteristic owing to the inductance of bonding wire causes disturbing, but system according to the invention, this stray inductance component can be used as the part of the radiation reactance component that can offset antenna, make and to remove the adverse effect that bonding wire causes, and can make electronic equipment compactness and cost low with better characteristic.Should also be noted that the S parameter characteristic shown in Fig. 6 represented illustratively according to as the mode in this embodiment 2, described set up the situation of matching condition.
Embodiment 3
Figure 10 is the block diagram that is used to illustrate according to the structure of the electronic installation of further embodiment of this invention.Since have with Fig. 8 in same numeral circuit block for Fig. 8 in identical circuit block, so omit explanation to it.These circuit blocks can be integrated on the semiconductor integrated circuit, so that compactness and cost are low.In this case, internal unit communication can be offset reactive component with send/receive antenna, and can work under narrow-band according to method as shown in Figure 9.At this moment, can eliminate the adverse effect that the inductive component by bonding wire (it couples together integrated circuit and antenna) causes according to said method.Yet these fluctuations may show as the fluctuation of the frequency selective characteristic between transmitting antenna and the reception antenna.Controlling these fluctuations more accurately is loaded down with trivial details work.These embodiment 3 illustrations at the measure of this loaded down with trivial details work.
That is to say that evaluation circuits 601 is assessed internal unit based on error rate for example and signal strength signal intensity and communicated by letter with the output of the demodulator circuit 416 of receiving circuit.Then, this evaluation circuits 601 will feed back to the carrier oscillator 406 of internal unit communication with transtation mission circuit through the output of assessment, and change its frequency of oscillation to select the optimum frequency at internal unit communication.By changing the frequency dividing ratio of frequency dividing circuit, perhaps, can easily change frequency by utilizing this technology of voltage controlled oscillator and PLL.Although in internal unit communication, send with receive between the position relation fix, very weak and do not depart from criterion and conflict owing to the electromagnetic intensity of radiation with authorized frequency that radio wave is controlled method, so can optionally change internal unit communication.Select as another kind, owing to use signal feeding back in the same Device memory that is used to send/receives operation, so can send these signals by the mode of wire signal.Therefore, the signal path of feedback operation need not to operate according to wireless mode, thereby can simplify circuit.
According to the present invention, can be in the deviation that the fluctuation that allows based on distribution and semiconductor integrated circuit technique causes, according to the mode of being easy to or realize the system of high reliability with low cost.
Industrial usability
Main body unit and the signal between the display unit that the present invention is not limited only in the portable phone connect Connect, and can be applicable in same equipment, mutually arrange the sorts of systems of a plurality of wireless systems, example As, be built-in with the system of wireless LAN. On the contrary, the present invention can be used in the following equipment: utilize Be used for receiving very low level electromagnetic receiver and (for example, be equipped with the portable of display part TV and GPS terminal) mutually carry out internal unit and communicate by letter, thus can utilize thought of the present invention That elimination is caused by internal unit communication, to the adverse effect of original device communication.
Claims (7)
1, a kind of electronic installation, this electronic installation is equipped with at least: first transmitting element, it is used to utilize electromagnetic wave to carry out first communication; Second transmitting element, it is used to utilize electromagnetic wave to carry out second communication; And receiving element, it is used to receive the signal that sends from described second transmitting element; Wherein:
Described electronic installation comprises:
Antenna, wherein, the diameter of ball that comprises radiator is less than 1/ (2 π) of the electromagnetic wavelength that uses in described second transmitting element or described receiving element.
2, electronic installation according to claim 1, wherein:
Described antenna is made of described radiator and reactance component, and this reactance component is used to eliminate the reactive component of described radiator.
3, electronic installation according to claim 1, wherein:
The partial circuit of described first transmitting element, described second transmitting element or described receiving element or whole circuit structure are on semiconductor integrated circuit; And
By the reactive component that distribution had on the described semiconductor integrated circuit and from the reactive component that distribution had of described semiconductor integrated circuit, eliminate the part or all of reactive component of the described radiator of described antenna up to the described radiator qualification of described antenna.
4, a kind of electronic installation, this electronic installation is equipped with at least: first transmitting element, it is used to utilize electromagnetic wave to carry out first communication; Second transmitting element, it is used to utilize electromagnetic wave to carry out second communication; And receiving element, it is used to receive the signal that sends from described second transmitting element; Wherein:
Described electronic installation comprises:
Antenna, wherein, the diameter of ball that comprises radiator is less than 1/ (2 π) of the electromagnetic wavelength that uses in described second transmitting element or described receiving element;
Apparatus for evaluating, it is used to assess the reception situation of described receiving element;
Control device, it is used to control the electromagnetic frequency that is sent by described second transmitting element; And
Feedback device, its assessment result that is used for being made by described apparatus for evaluating feeds back to described control device.
5, according to any described electronic installation of claim 1 to the claim 4, wherein:
Being shaped as of the described radiator of described antenna is linear.
6, according to any described electronic installation of claim 1 to the claim 5, wherein:
The described radiator of described antenna is made of the printed patterns that is formed on the printed panel.
7, a kind of wireless communication terminal, this wireless communication terminal comprises:
First outer cover unit;
Second outer cover unit;
Linkage unit, it is used for being connected described first outer cover unit and described second outer cover unit according to the variable mode of described first outer cover unit and the position relation between described second outer cover unit;
The external wireless communication antenna, it is installed on described first outer cover unit or described second outer cover unit;
The external wireless communication control unit, it is installed on described first outer cover unit, is mainly used in the external wireless communication that control is carried out with antenna by described external wireless communication;
Display unit, it is installed on described second outer cover unit;
The first internal radio communication control unit, it is installed on described first outer cover unit, is used to be controlled at the internal radio communication of carrying out between described first outer cover unit and described second outer cover unit;
The second internal radio communication control unit, it is installed on described second outer cover unit, is used to be controlled at the internal radio communication of carrying out between described first outer cover unit and described second outer cover unit;
The first internal radio communication antenna, it is installed on described first outer cover unit, and wherein, the diameter of ball that comprises radiator is less than 1/ (2 π) of the electromagnetic wavelength that uses in described internal radio communication;
The second internal radio communication antenna, it is installed on described second outer cover unit, and wherein, the diameter of described ball that comprises described radiator is less than 1/ (2 π) of the described electromagnetic wavelength that uses in described internal radio communication; And
The internal wireless timing control unit, it is used for based on regularly being controlled at electromagnetic the transmissions timing that described internal radio communication sends via described external wireless communication with electromagnetic send of antenna transmission.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004199421 | 2004-07-06 | ||
| JP199421/2004 | 2004-07-06 | ||
| JP367203/2004 | 2004-12-20 |
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| Publication Number | Publication Date |
|---|---|
| CN1981451A true CN1981451A (en) | 2007-06-13 |
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ID=38131632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800225220A Pending CN1981451A (en) | 2004-07-06 | 2005-07-05 | Electronic apparatus and wireless communication terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155872A (en) * | 2011-01-05 | 2014-11-19 | 精工爱普生株式会社 | Timepiece with a wireless function |
| CN109449560A (en) * | 2018-12-14 | 2019-03-08 | 湖南华诺星空电子技术有限公司 | A kind of radar antenna and preparation method thereof |
-
2005
- 2005-07-05 CN CNA2005800225220A patent/CN1981451A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155872A (en) * | 2011-01-05 | 2014-11-19 | 精工爱普生株式会社 | Timepiece with a wireless function |
| CN104155872B (en) * | 2011-01-05 | 2017-01-18 | 精工爱普生株式会社 | Timepiece with a wireless function |
| CN109449560A (en) * | 2018-12-14 | 2019-03-08 | 湖南华诺星空电子技术有限公司 | A kind of radar antenna and preparation method thereof |
| CN109449560B (en) * | 2018-12-14 | 2024-04-12 | 华诺星空技术股份有限公司 | Radar antenna and preparation method thereof |
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