CN100411372C - Wireless local area network system capable of detecting states of wireless connection - Google Patents
Wireless local area network system capable of detecting states of wireless connection Download PDFInfo
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- CN100411372C CN100411372C CNB2004101010948A CN200410101094A CN100411372C CN 100411372 C CN100411372 C CN 100411372C CN B2004101010948 A CNB2004101010948 A CN B2004101010948A CN 200410101094 A CN200410101094 A CN 200410101094A CN 100411372 C CN100411372 C CN 100411372C
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Abstract
The present invention provides a wireless local area network system for detecting antenna connection states, which is suitable for an electronic device. The wireless local area network system comprises a control circuit, a base band circuit and a radio frequency circuit module which is electrically connected with the control circuit and the base band circuit, wherein the radio frequency module comprises a signal transmission circuit, a coupler and a signal receiving circuit, wherein the signal transmission circuit can output a transmission signal; the coupler comprises a transmission path and a receiving path, and is electrically connected with the signal transmission circuit; the transmission signals of the signal transmission circuit can be output by the transmission path; the signal receiving circuit is electrically connected with the coupler and can be used for receiving reflected signals which are received by the receiving path of the coupler, wherein the radio frequency circuit module can detect whether the coupler is electrically connected with an antenna by the transmission signals and the reflected signals.
Description
Technical field
The present invention is meant a kind of wireless local area network (WLAN) system that detects connection status of antenna that has especially about a kind of wireless local area network (WLAN) system.
Background technology
Under the leading of global telecommunications liberalization agitation, add the flourish of world-wide web and wireless telecommunications, communication has become the high-tech area of tool growth after information industry.And the development of wireless communication technique along with rapid technological improvements such as electronic information and numerals, provides people can obtain various information whenever and wherever possible, comprises voice, data etc., more past multimedia video information development in future.Wherein (Wireless Local Area Networks, WLAN), under the situation that wireless internet population in use number is grown up fast, global radio local area network (LAN) output also increases WLAN (wireless local area network) year by year.
See also Fig. 1 (a), it is the electrical block diagram of known wireless local area network (WLAN) system, as shown in the figure, wireless local area network (WLAN) system (hereinafter to be referred as wlan system) 10 comprises medium access control chip (MACIC) 11, baseband chip (Baseband IC) 12 and radio frequency chip (RF IC) 13, the one end is connected (not icon) with the mobile computer system, the other end then is connected with antenna 14, this wlan system 10 is main by the radio wave that is transmitted in antenna 14 admission of airs, convert high frequency radio wave to low frequency signal via radio frequency chip 13 again, low frequency signal after the conversion will be sent to baseband chip 12 and carry out demodulation process, and judge by medium access control chip (MAC IC) 11 whether the signal after the demodulation is the data that the mobile computer system will receive, if judged result is for being then to receive and be sent to the mobile computer internal system.
The data of another function of this wlan system 10 for needing the mobile computer system will be transmitted, earlier carry out calculation process by 11 pairs of data of medium access control chip, again the data after the calculation process are sent to baseband chip 12 and carry out modulation process, convert data to high-frequency signal by low frequency signal by radio frequency chip 13 at last, and be sent in the air via antenna 14.
See also Fig. 1 (b), it is the electrical block diagram of the radio frequency chip shown in Fig. 1 (a).As shown in the figure, known radio frequency chip 13 comprises signal transfer circuit 131, signal receiving circuit 132 and diverter switch 133.
Because wlan system 10 is half-duplex (half-duplex) radio-frequency (RF) system, therefore the work that can't transmit signal and received signal simultaneously, must separately carry out, shown in Fig. 1 (b), signal transfer circuit 131 and signal receiving circuit 132 use same antenna 14 to carry out the transmission and the reception of signal.When the radio frequency chip 13 of wlan system 10 will transmit signal, diverter switch 133 will switch to signal transfer circuit 131 ends, signal transfer circuit 131 and antenna 14 are electrically connected, and medium access control chip 11 (shown in Fig. 1 (a)) will produce control signal and come shutdown signal receiving circuit 132.Otherwise, when the radio frequency chip 13 of wlan system 10 is wanted received signal, diverter switch 133 will switch to signal receiving circuit 132 ends, and signal receiving circuit 132 and antenna 14 are electrically connected, and medium access control chip 11 will produce control signal and come shutdown signal transfer circuit 131.
In the IT industry and the market level, more and more be subjected to goods producer and user's attention in mobile computer installing WLAN function, and present wlan system 10 is arranged in the mobile computer with the form of appending accessory module (add-on module), and antenna 14 is connected with the radio frequency connector (not icon) of wlan system 10 by cable (cable).But, because when carrying out the assembly working of mobile computer, be that mode with hand assembled is connected the radio frequency connector of cable with wlan system 10, and will exist some risk in the mode of hand assembled, for example, the damage, cable that causes radio frequency connector easily is not connected with the radio frequency connector of wlan system 10 and the situation that causes antenna 14 not to be connected with wlan system 10 really, or causes antenna 14 to damage because of the application of force is improper when assembling.When antenna 14 taking place electrically connect with wlan system 10, the signal that is transmitted by signal transfer circuit 131 can't send out and reflected back signal transfer circuit 131 (shown in Fig. 1 (c)), so will cause the wlan system 10 can't normal operation.
Because whether the design of known wlan system 10 does not have the design of installation really of the antenna of detection, therefore when causing wlan system 10 normally to pass the collection of letters because of the incorrect installation of antenna, the maintenance personal need be by specific apparatus ability energy measurement, and common solution all is that whole wlan system and antenna are changed, and so will cause the waste of resource and the cost that increases maintenance.
Therefore, how to develop and a kind ofly improve above-mentioned known technology disappearance, and can detect antenna whether really installation have a wireless local area network (WLAN) system that detects connection status of antenna, real is the problem that presses for solution at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of wireless local area network (WLAN) system that detects connection status of antenna that has, receive the reflected signal of the transmission signal of exporting by the transfer path of this directional coupler by the RX path of directional coupler, with judge antenna whether really with the wireless local area network (WLAN) system electric connection, thereby solve the conventional WLAN system and do not detect the design whether antenna is installed really, cause the degree of difficulty in the maintenance, the waste of resource and the shortcomings such as cost that increase maintenance because of having.
For achieving the above object, of the present invention one than broad sense embodiment for a kind of wireless local area network (WLAN) system is provided, it is applicable to an electronic installation, this wireless local area network (WLAN) system comprises: a control circuit; One baseband circuit; One radio-frequency (RF) circuit module, it is electrically connected with this control circuit and this baseband circuit, and this radio-frequency (RF) circuit module comprises: a signal transfer circuit, its output one transmits signal; One coupler, it comprises a transfer path and a RX path, and be electrically connected with this signal transfer circuit, in order to by this transfer path this of this signal transfer circuit being transmitted signal output, and this RX path is in order to receive the reflected signal that this transmissions signal is then reflected by this transfer path output; One signal receiving circuit, it is electrically connected on this coupler, in order to receive via this reflected signal by this RX path; Wherein, whether this radio-frequency (RF) circuit module detects this coupler by this transmission signal and this reflected signal and is electrically connected with an antenna.
Above-mentioned wireless local area network (WLAN) system, wherein this electronic installation is a mobile computer, this antenna is a radio-frequency antenna, and this control circuit is a medium access control chip, in order to this signal transfer circuit and this signal receiving circuit that activates this radio-frequency (RF) circuit module simultaneously.
Above-mentioned wireless local area network (WLAN) system, wherein this reflected signal is exported the signal that the back is reflected for this transmission signal by this transfer path of this coupler, this coupler is a directed coupler, it comprises in order to exporting this transfer path of this transmission signal, and in order to receive this RX path that transmits this reflected signal of signal about this.
Above-mentioned wireless local area network (WLAN) system, wherein this radio-frequency (RF) circuit module also comprises a frequency generator, itself and this signal transfer circuit and this signal receiving circuit electrically connect, in order to produce the frequency signal that this signal transfer circuit and this signal receiving circuit operate required transmission.
Above-mentioned wireless local area network (WLAN) system, wherein this signal transfer circuit comprises a mixer, one transmitter and a band pass filter, this mixer and this baseband circuit and this frequency generator electrically connect, in order to this frequency signal that signal and this frequency generator produced that this baseband circuit transmitted is integrated into this transmission signal, this transmitter is electrically connected with this mixer, in order to the power amplification that will transmit signal to exporting required power, this band pass filter is electrically connected with this transmitter and this coupler, be somebody's turn to do the noise that transmits signal in order to filtering, and this transmission signal that will finish dealing with transfers to this coupler output.
Above-mentioned wireless local area network (WLAN) system, wherein this signal receiving circuit comprises a mixer, a receiver and a low pass filter, this receiver is in order to receive this reflected signal, this mixer and this receiver and this frequency generator electrically connect, in order to this frequency signal that signal and this frequency generator produced that this receiver received is integrated, this low pass filter carries out filtering in order to this mixer is integrated the signal of finishing, to obtain required signal.
Above-mentioned wireless local area network (WLAN) system, wherein this radio-frequency (RF) circuit module judges recently by the voltage standing wave(VSW) of this transmission signal and this reflected signal whether this coupler is electrically connected with this antenna.
For achieving the above object, the present invention also provides a kind of radio-frequency (RF) circuit module, and it is applicable to a wireless local area network (WLAN) system, and this radio-frequency (RF) circuit module comprises: a signal transfer circuit, and its output one transmits signal; One coupler, it comprises a transfer path and a RX path, and be electrically connected with this signal transfer circuit, in order to by this transfer path this of this signal transfer circuit being transmitted signal output, and this RX path is in order to receive the reflected signal that this transmissions signal is then reflected by this transfer path output; One signal receiving circuit, it is electrically connected on this coupler, in order to receive this reflected signal via this RX path; Wherein, whether this radio-frequency (RF) circuit module detects this coupler by this transmission signal and this reflected signal and is electrically connected with an antenna.
Above-mentioned radio-frequency (RF) circuit module, wherein this reflected signal is exported the signal that the back is reflected for this transmission signal by this transfer path of this coupler.
Above-mentioned radio-frequency (RF) circuit module, wherein this coupler is a directed coupler, it comprises in order to exporting this transfer path of this transmission signal, and in order to receive this RX path that transmits this reflected signal of signal about this.From following accompanying drawing and embodiment explanation, will be able to more deep understanding to the present invention.
Description of drawings
Fig. 1 (a) is the electrical block diagram of known wlan system.
Fig. 1 (b) is the electrical block diagram of the radio frequency chip shown in Fig. 1 (a).
Fig. 1 (c) is the antenna shown in Fig. 1 (b) when not electrically connecting with wlan system, the transmission of signal and reflection path schematic diagram.
Fig. 2 (a) is the circuit box schematic diagram of the wireless local area network (WLAN) system of the present invention's first preferred embodiment.
Fig. 2 (b) is the oscillogram that wlan system transmits signal and reflected signal when being connected with radio-frequency antenna.
Fig. 2 (c) is the directional coupler of the radio-frequency (RF) circuit module shown in Fig. 2 (a) when not electrically connecting with antenna, the transmission of signal and reflection path schematic diagram.
Fig. 2 (d) transmits the oscillogram of signal and reflected signal when not being connected with radio-frequency antenna for wlan system.
Fig. 3 is the oscillogram of radio-frequency antenna in the voltage standing wave ratio of different frequency.
Fig. 4 is the circuit box schematic diagram of the radio-frequency (RF) circuit module of the wireless local area network (WLAN) system of the present invention's second preferred embodiment.
Number in the figure is described as follows:
10: wireless local area network (WLAN) system 11: the medium access control chip
12: baseband chip 13: radio frequency chip
14: antenna 131: signal transfer circuit
132: signal receiving circuit 133: diverter switch
20: wireless local area network (WLAN) system 21: the medium access control chip
22: baseband circuit 23: radio-frequency (RF) circuit module
231: signal transfer circuit 2311: mixer
2312: transmitter 2313: band pass filter
232: signal receiving circuit 2321: receiver
2322: mixer 2323: low pass filter
233: directional couple 234: frequency generator
235: diverter switch 236: diverter switch
24: radio-frequency antenna
Embodiment
Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different embodiment, it does not all depart from the scope of the present invention, and explanation wherein and the icon usefulness that should explain in itself, but not in order to restriction the present invention.
See also Fig. 2 (a), it is the circuit box schematic diagram of the wireless local area network (WLAN) system of the present invention's first preferred embodiment.Shown in Fig. 2 (a), wireless local area network (WLAN) system 20 comprises medium access control chip 21, baseband circuit 22 and radio-frequency (RF) circuit module 23, medium access control chip 21 electrically connects with the transmitter 23 12 and the receiver 2321 of baseband circuit 22 and radio-frequency (RF) circuit module 23, in order to controlling the on off state of transmitter 2312 and receiver 2321 according to different operating states, see also following table as for the on off state of transmitter 2312 and receiver 2321:
| Preference pattern | The transmitter operating state | The receiver operating state |
| Detect antenna mode | Activate | Activate |
| Transmit communication mode | Activate | Close |
| Receive communication mode | Close | Activate |
Be specified in the known technology as for the circuit design principle of medium access control chip 21 and baseband circuit 22 and the purpose that can reach and effect, therefore repeated no more.
And wireless local area network (WLAN) system 20 is under general normal operation state, promptly transmit communication mode and receive communication mode, one end of wireless local area network (WLAN) system 20 electrically connects by radio-frequency (RF) circuit module 23 and radio-frequency antenna 24, and the other end electrically connects (not icon) by medium access control chip 21 with the mobile computer system.
Wherein, radio-frequency (RF) circuit module 23 is made up of signal transfer circuit 231, signal receiving circuit 232, coupler 233 and frequency generator 234, mainly convert low frequency signal in air, or converting the low-frequency data signal that baseband circuit 22 is transmitted to high frequency radio wave sends out via radio-frequency antenna 24 again in order to the high frequency radio wave that radio-frequency antenna 24 is received.And coupler 233 is a directed coupler 233, it comprises transfer path 2331 and RX path 2332, transfer path 2331 is in order to transmit the signal that signal transfer circuit 231 is exported, and the high-frequency signal that RX path 2332 is received in air in order to received RF antenna 24, or by the signal that is reflected after transfer path 2331 outputs.
And signal receiving circuit 232 comprises receiver 2321, mixer 2322 and low pass filter 2323, the high-frequency signal that receiver 2321 is received in air in order to received RF antenna 24, or by the signal that is reflected after transfer path 2331 outputs, mixer 2322 electrically connects with receiver 2321 and frequency generator 234, the calculation process that the frequency signal that is produced in order to high-frequency signal that receiver 2321 is received and frequency generator 234 multiplies each other, and then convert high-frequency signal to low frequency signal, at last, by low pass filter 2323 mixer 2322 is integrated unwanted signal filtering in the low frequency signal of finishing, to obtain required signal.
When wlan system 20 can't normally pass the collection of letters, whole wlan system 20 need enter the detection antenna mode, transmitting signals and received signal by directional coupler 233 uses the characteristics in different paths further to judge whether can't normally pass the collection of letters number because of the correct installation of radio-frequency antenna 24 causes wlan system 20, enter under the detection antenna mode at wlan system 20, medium access control chip 21 will produce control signal and come the transmitter 2312 of activation signal transfer circuit 231 and the receiver 2321 of signal receiving circuit 232, and export one by signal transfer circuit 231 and test the transmission signal of usefulness, wherein, this transmission signal need not comprise data-signal, the frequency signal that only needs to use wlan system 20 to use originally can detect radio-frequency antenna 24 whether really with directional coupler 233 electric connections of the radio-frequency (RF) circuit module 23 of wlan system 20, this transmission signal of being exported as for signal transfer circuit 231 is transfer path 2331 outputs by directional coupler 233, and detection mode of the present invention is that the RX path 2332 by directional coupler 233 receives the reflected signal that this transmissions signal is then reflected by transfer path 2331 outputs of directional coupler 233.
When radio-frequency antenna 24 is connected with the directional coupler 233 of the radio-frequency (RF) circuit module 23 of wlan system 20 really, after exporting, this transmission signal that signal transfer circuit 231 is exported only has a little signal reflex return (shown in Fig. 2 (b)).Otherwise when directional coupler 233 does not connect radio-frequency antenna 24 (shown in Fig. 2 (c)), this whole signal in transmission signal output back all can reflect (shown in Fig. 2 (d)).
In the present embodiment, the present invention judges by voltage standing wave ratio (VSWR) numerical value that transmits signal and reflected signal whether wlan system 20 is connected with radio-frequency antenna 24, and the relational expression of voltage standing wave ratio is VSWR=(E
Transmitted+ E
Receiver)/(E
Transmitted-E
Receiver), E wherein
TransmittedRepresentative transmits the energy of signal, E
ReceiverRepresent the energy of reflected signal.When error that is taken place when radio-frequency antenna 24 is assembled because of mobile computer or damage are not connected with wlan system 20, all transmission signals will all reflect, and thus, transmit the VSWR=(E of signal and reflected signal
Transmitted+ E
Receiver)/0 numerical value will be ∞.
See also Fig. 3, it is the oscillogram of radio-frequency antenna in the voltage standing wave ratio of different frequency, in existing wlan system 20, the VSWR of radio-frequency antenna 24 under frequency of operation is less than 2, promptly represent radio-frequency antenna 24 and wlan system 20 to be in the normal operation state, therefore, the result who detects VSWR when wlan system 20 detects antenna mode is greater than under 2 the situation, and wlan system 20 will send a message and inform that the connection status of radio-frequency antenna 24 is undesired.Thus, the product maintenance personal just can find easily that wlan system 20 can't pass normally that to collect mail number be because radio-frequency antenna 24 does not normally connect or damage is arranged, only need to change radio-frequency antenna 24 and just can deal with problems, and need not change the wlan system 20 that does not damage.
See also Fig. 4, it is the circuit box schematic diagram of the wireless local area network (WLAN) system of the present invention's second preferred embodiment.As shown in the figure, wireless local area network (WLAN) system 20 comprises medium access control chip 21, baseband circuit 22 and radio-frequency (RF) circuit module 23.And radio-frequency (RF) circuit module 23 comprises signal transfer circuit 231, signal receiving circuit 232, directional coupler 233, frequency generator 234, diverter switch 235 and diverter switch 236.
Wherein, the circuit design principle of the receiver 2321 of the mixer 2311 of signal transfer circuit 231, transmitter 2312 and band pass filter 2313, signal receiving circuit 232, mixer 2322 and low pass filter 2323, directional coupler 233, frequency generator 234, medium access control chip 21 and baseband circuit 22 and the purpose that can reach and effect have been specified in first preferred embodiment, therefore repeat no more.
In this embodiment, when wlan system 20 is under the general normal operation state, when promptly transmitting communication mode and receiving communication mode, radio-frequency (RF) circuit module 23 is come Continuity signal transfer circuit 231 or signal receiving circuit 232 by diverter switch 235, otherwise, when wlan system 20 number enters when detecting antenna mode because of can't normally passing to collect mail, radio-frequency (RF) circuit module 23 needs to transmit signals and received signal by directional coupler 233 and uses the characteristics in different paths further to judge whether can't normally pass the collection of letters number because of the correct installation of radio-frequency antenna 24 causes wlan system 20.Certainly, diverter switch 235 needs to trigger by the control signal of another diverter switch 236 according to medium access control chip 21 with the on off state of directional coupler 233.As for the on off state of medium access control chip 21 control directional couplers 233, diverter switch 235, transmitter 2312 and receiver 2321 as described in the following table:
| |
235 runnings of directional coupler/diverter switch | The transmitter operating state | The receiver operating state | |
| Detect antenna mode | Directional coupler | Activate | Activate | |
| Transmit communication | Diverter switch | 235 | Activate | Close |
| Receive communication | Diverter switch | 235 | Close | Activate |
In sum, wireless local area network (WLAN) system with detection connection status of antenna of the present invention, transmitting signal by directional coupler is to use the characteristics in different paths to receive the reflected signal that transmission signal output back is reflected with received signal, judge whether to cause wlan system normally to pass to collect mail number with this transmission signal and this reflected signal because of the correct installation of radio-frequency antenna, when wlan system does not normally connect because of radio-frequency antenna 24 or have damage normally to pass the collection of letters, the maintenance personal place of can pinpointing the problems easily, and only need change radio-frequency antenna, can reduce the waste of resource and the cost that reduces maintenance.
The present invention can make various remodeling by being familiar with those skilled in the art, yet does not break away from claims scope required for protection.
Claims (9)
1. wireless local area network (WLAN) system, it is applicable to an electronic installation, this wireless local area network (WLAN) system comprises:
One control circuit;
One baseband circuit; And
One radio-frequency (RF) circuit module, it is electrically connected with this control circuit and this baseband circuit, and this radio-frequency (RF) circuit module comprises:
One signal transfer circuit, its output one transmits signal;
One coupler, it comprises a transfer path and a RX path, and be electrically connected with this signal transfer circuit, in order to by this transfer path this of this signal transfer circuit being transmitted signal output, and this RX path is in order to receive the reflected signal that this transmissions signal is then reflected by this transfer path output; And
One signal receiving circuit, it is electrically connected on this coupler, in order to receive this reflected signal by this RX path;
Wherein, whether this radio-frequency (RF) circuit module detects this coupler by this transmission signal and this reflected signal and is electrically connected with an antenna.
2. wireless local area network (WLAN) system as claimed in claim 1, wherein this electronic installation is a mobile computer, this antenna is a radio-frequency antenna, and this control circuit is a medium access control chip, in order to this signal transfer circuit and this signal receiving circuit that activates this radio-frequency (RF) circuit module simultaneously.
3. wireless local area network (WLAN) system as claimed in claim 1, wherein this coupler is a directed coupler, it comprises in order to exporting this transfer path of this transmission signal, and in order to receive this RX path that transmits this reflected signal of signal about this.
4. wireless local area network (WLAN) system as claimed in claim 1, wherein this radio-frequency (RF) circuit module also comprises a frequency generator, itself and this signal transfer circuit and this signal receiving circuit electrically connect, in order to produce the frequency signal that this signal transfer circuit and this signal receiving circuit operate required transmission.
5. wireless local area network (WLAN) system as claimed in claim 4, wherein this signal transfer circuit comprises a mixer, one transmitter and a band pass filter, this mixer and this baseband circuit and this frequency generator electrically connect, in order to this frequency signal that signal and this frequency generator produced that this baseband circuit transmitted is integrated into this transmission signal, this transmitter is electrically connected with this mixer, in order to the power amplification that will transmit signal to exporting required power, this band pass filter is electrically connected with this transmitter and this coupler, be somebody's turn to do the noise that transmits signal in order to filtering, and this transmission signal that will finish dealing with transfers to this coupler output.
6. wireless local area network (WLAN) system as claimed in claim 4, wherein this signal receiving circuit comprises a mixer, a receiver and a low pass filter, this receiver is in order to receive this reflected signal, this mixer and this receiver and this frequency generator electrically connect, in order to this frequency signal that signal and this frequency generator produced that this receiver received is integrated, this low pass filter carries out filtering in order to this mixer is integrated the signal of finishing, to obtain required signal.
7. wireless local area network (WLAN) system as claimed in claim 1, wherein this radio-frequency (RF) circuit module judges recently by the voltage standing wave(VSW) of this transmission signal and this reflected signal whether this coupler is electrically connected with this antenna.
8. radio-frequency (RF) circuit module, it is applicable to a wireless local area network (WLAN) system, this radio-frequency (RF) circuit module comprises:
One signal transfer circuit, its output one transmits signal;
One coupler, it comprises a transfer path and a RX path, and be electrically connected with this signal transfer circuit, in order to by this transfer path this of this signal transfer circuit being transmitted signal output, and this RX path is in order to receive the reflected signal that this transmissions signal is then reflected by this transfer path output; And
One signal receiving circuit, it is electrically connected on this coupler, in order to receive this reflected signal via this RX path;
Wherein, whether this radio-frequency (RF) circuit module detects this coupler by this transmission signal and this reflected signal and is electrically connected with an antenna.
9. radio-frequency (RF) circuit module as claimed in claim 8, wherein this coupler is a directed coupler, it comprises in order to exporting this transfer path of this transmission signal, and in order to receive this RX path that transmits this reflected signal of signal about this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101010948A CN100411372C (en) | 2004-12-27 | 2004-12-27 | Wireless local area network system capable of detecting states of wireless connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101010948A CN100411372C (en) | 2004-12-27 | 2004-12-27 | Wireless local area network system capable of detecting states of wireless connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1798077A CN1798077A (en) | 2006-07-05 |
| CN100411372C true CN100411372C (en) | 2008-08-13 |
Family
ID=36818868
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101010948A Expired - Fee Related CN100411372C (en) | 2004-12-27 | 2004-12-27 | Wireless local area network system capable of detecting states of wireless connection |
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| CN (1) | CN100411372C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1968028B (en) * | 2005-11-15 | 2011-04-20 | 宏碁股份有限公司 | Wireless electron device and its control method |
| CN112491436B (en) * | 2019-09-12 | 2022-04-26 | 瑞昱半导体股份有限公司 | Radio frequency circuit |
| CN112165352B (en) * | 2020-09-24 | 2021-04-16 | 天宸星通(深圳)科技有限公司 | Interaction method for satellite Internet of things terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1156927A (en) * | 1995-11-10 | 1997-08-13 | 日本电气株式会社 | Antenna alarm detection system |
| CN1204904A (en) * | 1997-06-30 | 1999-01-13 | 日本电气株式会社 | Antenna malfunction detecting system |
| CN1211892A (en) * | 1997-07-10 | 1999-03-24 | Lg情报通信株式会社 | Apparatus and method for measuring voltage standing wave radio in antenna of base station |
| US6178310B1 (en) * | 1996-12-30 | 2001-01-23 | Lg Information & Communications, Ltd. | Transmitting and receiving antenna voltage standing wave ratios measuring circuit of base station in mobile communication system |
-
2004
- 2004-12-27 CN CNB2004101010948A patent/CN100411372C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1156927A (en) * | 1995-11-10 | 1997-08-13 | 日本电气株式会社 | Antenna alarm detection system |
| US6178310B1 (en) * | 1996-12-30 | 2001-01-23 | Lg Information & Communications, Ltd. | Transmitting and receiving antenna voltage standing wave ratios measuring circuit of base station in mobile communication system |
| CN1204904A (en) * | 1997-06-30 | 1999-01-13 | 日本电气株式会社 | Antenna malfunction detecting system |
| CN1211892A (en) * | 1997-07-10 | 1999-03-24 | Lg情报通信株式会社 | Apparatus and method for measuring voltage standing wave radio in antenna of base station |
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| CN1798077A (en) | 2006-07-05 |
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