JP2002232319A - Information processor and communication monitoring and controlling program - Google Patents

Information processor and communication monitoring and controlling program

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Publication number
JP2002232319A
JP2002232319A JP2001025568A JP2001025568A JP2002232319A JP 2002232319 A JP2002232319 A JP 2002232319A JP 2001025568 A JP2001025568 A JP 2001025568A JP 2001025568 A JP2001025568 A JP 2001025568A JP 2002232319 A JP2002232319 A JP 2002232319A
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JP
Japan
Prior art keywords
antenna
wireless communication
resonance frequency
information processing
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001025568A
Other languages
Japanese (ja)
Inventor
Satoru Kazama
Shinichi Shiozu
真一 塩津
哲 風間
Original Assignee
Fujitsu Ltd
富士通株式会社
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Filing date
Publication date
Application filed by Fujitsu Ltd, 富士通株式会社 filed Critical Fujitsu Ltd
Priority to JP2001025568A priority Critical patent/JP2002232319A/en
Publication of JP2002232319A publication Critical patent/JP2002232319A/en
Pending legal-status Critical Current

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Abstract

(57) [Summary] [PROBLEMS] To provide a function of adjusting the resonance frequency of an antenna to minimize the space occupied by the antenna. An information processing apparatus includes a plurality of wireless communication units (1).
2, 13), an antenna (30), and a monitoring control function unit (11). The monitoring control function unit changes the resonance frequency of the antenna and monitors the communication state of the one wireless communication unit when one of the plurality of wireless communication units is communicating. And adjusts the resonance frequency of the antenna according to the communication state. The monitoring control function unit adjusts the resonance frequency of the antenna according to the activated application when one of the plurality of wireless communication units is connected to the antenna.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus having a wireless communication function, and more particularly, to an information processing apparatus having a plurality of wireless communication modules and one narrow band antenna.

[0002]

2. Description of the Related Art In recent years, notebook personal computers (PCs) having a wireless communication function or a wireless transmission / reception function for communicating with various peripheral devices have been developed. The wireless communication function replaces a normal connection cable for connecting a personal computer to a peripheral device or a mobile device such as a PDA. Wireless communication between a personal computer and peripherals such as digital cameras, scanners or printers
Typically, it is performed according to a short-range wireless communication standard such as the Bluetooth standard. According to the Bluetooth standard, a 2.4 GHz band (2.
402 to 2.480 GHz), and power classes 1 to 3 (1 mW, 2.5 mW, 100 mW) are defined, and depending on the class, short-to-medium-range communication in a range of about 10 m to about 100 m. Is possible. The standard uses GFSK modulation and frequency hopping. Each of the personal computer and the peripheral device has one wireless transceiver.

On the other hand, for example, a PDC (mobile phone, Personal
Operating frequency 2.4 GHz band (2.40) such as mobile communication networks such as Digital Cellular, PHS and CDMA, or according to, for example, IEEE 802.11 specifications (standards).
~ 2.497 GHz) spectrum direct spread system (D
It has a wireless communication function of communicating with another personal computer or an information processing device via various networks (base stations) such as a wireless LAN that performs communication by BPSK modulation, DQPSK modulation or frequency hopping method (GFSK modulation). There are also personal computers. Typically, such a network uses a wireless LAN suitable for high-speed data transmission in a building or an office, and connects a PDC, PHS or CDMA mobile unit via a mobile communication network outdoors. Data transmission is performed using the data. In a conventional notebook personal computer, a single wireless transceiver corresponding to one of the above wireless communication systems is inserted in the form of a wireless card.

[0004]

A small chip antenna having a length of about 1 to 2 cm can be built in a personal computer. The chip antenna includes, for example, a helical antenna and a dielectric ceramic antenna in which a metal electrode is formed around a ceramic dielectric. However, in the manufacturing process, the distance and the positional relationship between the chip antenna in the personal computer and the objects around the chip tend to vary for each product, and since the chip antenna has a narrow band, its antenna resonance frequency Tends to shift. For example, in a personal computer, the distance and positional relationship between a chip antenna and its surrounding metal objects, plastic covers, and the like are slightly different for each product. Higher and lower. Also, for example, a small opening is provided in the rear part of the housing of the personal computer, and a part of the chip antenna is exposed or protrudes from the opening, and a plastic cap is fitted so as to cover the exposed part of the antenna. Have been. The antenna resonance frequency shifts up and down depending on the difference in how the plastic cap is attached to each product.

[0005] Personal computers are used in various environments, and the antenna resonance frequency may deviate when an object such as a desk, a wall, or a human body that affects the antenna characteristics approaches the chip antenna. is there.

[0006] To prevent such resonance frequencies, a broader antenna with a larger size must generally be used. However, in order to reduce the size of the information processing device, it is better to make the antenna as small as possible.

Further, in the future, a plurality of different radios for radio communication with other personal computers in the room or a plurality of peripheral devices or a network (mobile communication network access point (base station) or wireless LAN access point). The inventor has recognized that the transceiver module will be incorporated into the body of the personal computer or inserted in the form of a card. further,
Such multiple wireless transceiver modules include notebook and personal computers, as well as desktop and handheld personal computers,
And other information portable terminals or information processing devices.

FIG. 6A shows a notebook personal computer 600 having a plurality of wireless transceiver modules, for example, a PHS communication module 601 and a wireless LA.
The arrangement in the case where N modules 602 and small chip antennas 605 and 606 corresponding to the respective modules are provided is shown in a perspective view. The resonance frequency of the antenna 605 for the PHS communication module 601 is about 1.9 GHz. The resonance frequency of the antenna 606 for the wireless LAN module 602 is about 2.4 GHz.
The resonance frequency of the antenna for the PDC module is about 800 MHz. The wireless module 601 is coupled to an antenna 605 via a coaxial cable 603.
The wireless module 602 is coupled to an antenna 606 via a coaxial cable 604. However, if such a configuration is employed in which a plurality of antennas are accommodated in a personal computer, the size of the device increases and the price of the product also increases.

In order to reduce the size of the personal computer, as shown in FIG. 6B, which shows the arrangement of a plurality of wireless communication modules and one antenna in a perspective view, wireless transceiver modules 601 and 602 are shown. Is preferably connected to one antenna 607 via the changeover switch 610 and the coaxial cable 605, and a plurality of wireless transmission / reception modules should share the antenna 607. But for that,
For example, a two-resonance-frequency antenna having a resonance frequency of about 1.9 GHz and about 2.4 GHz, a resonance frequency of about 1.9 GHz
Larger antennas must be used, such as wider frequency band antennas from z to about 2.4 GHz, or antennas with adjustable length. However, in order to reduce the size of the information processing device, it is better to make the antenna as small as possible.

The inventor has recognized that in order to make the space occupied by the antenna smaller, it is only necessary to use a small-sized narrow-band antenna for the information processing apparatus and adjust the resonance frequency thereof.

A primary object of the present invention is to provide a function for adjusting the resonance frequency of an antenna. Another object of the present invention is to make the space occupied by the antenna in the information processing device as small as possible.

[0012]

According to one aspect of the present invention, an information processing apparatus includes at least one wireless communication unit, an antenna, and a monitoring control function unit. The monitoring control function unit monitors the communication state of the one wireless communication unit by changing the resonance frequency of the antenna while the one wireless communication unit is communicating, and responds according to the communication state. The resonance frequency of the antenna is adjusted.

In the embodiment of the present invention, the monitoring control function unit adjusts the resonance frequency of the antenna according to which of the plurality of communication units is connected to the antenna.

According to still another feature of the present invention, the supervisory control function unit of the information processing device includes one of the plurality of wireless communication units.
When one of the wireless communication units is connected to the antenna, the resonance frequency of the antenna is adjusted in accordance with the activated application.

According to still another feature of the present invention, a communication monitoring control program for an information processing device includes a program for controlling a resonance of an antenna when at least one wireless communication unit is communicating with a processor of the information processing device. The step of changing the frequency to monitor the communication state of the one wireless communication unit and the step of adjusting the resonance frequency of the antenna according to the communication state are executed.

According to still another feature of the present invention, a communication monitoring control program for an information processing device includes a processor of the information processing device, wherein one of a plurality of wireless communication units is connected to an antenna. When this is done, the step of adjusting the resonance frequency of the antenna according to the launched application is performed.

According to the present invention, the resonance frequency of the antenna in the information processing device can be adjusted, and the space occupied by the antenna in the information processing device can be reduced as much as possible. Further, according to the present invention, one narrowband antenna can be shared by a plurality of wireless communication modules. Therefore, the cost of the antenna can be reduced.
Further, according to the present invention, it is possible to cope with variations in conditions around the antenna in the information processing apparatus and fluctuations in the use environment of the information processing apparatus.

[0018]

FIG. 1 shows an information processing apparatus 1 according to the present invention.
0 shows a basic circuit configuration. Information processing device 10
Is a notebook personal computer of FIG. 1, for example, a signal processing unit or processor 11 including a communication monitoring control function, a storage device 15, a first wireless communication unit 12, and a second wireless communication unit. 13, a resonance frequency control unit 20, and a small chip antenna 30.

The information processing apparatus 10 is, for example, a peripheral device (not shown) such as a digital camera, a facsimile machine or a printer with a wireless communication device, for example, via a wireless communication unit (12 or 13) of the Bluetooth standard. Data can be transmitted / received to / from an information processing device (not shown) such as an electronic organizer with a wireless communication device or another personal computer according to a predetermined communication protocol. Alternatively, the information processing apparatus 10 can transmit and receive data to and from a wireless LAN access point (not shown) via a communication unit of the wireless LAN standard according to a predetermined communication protocol. Alternatively, the information processing device 10
Transmits / receives data to / from a mobile communication network access point (not shown) via a wireless communication unit of PDC (mobile phone), PHS or CDMA of mobile communication network standard according to a predetermined communication protocol. be able to.

The signal processing unit 11 of the information processing device 10
This is a normal information processing unit of a personal computer including a PU, a ROM, a RAM, and the like. The storage device 15 is a storage medium such as a magnetic disk, for example.
Stores application programs, communication monitoring and control programs, and the like.

The first wireless communication unit 12 is one of a short-range wireless communication module, a mobile station wireless communication module for mobile communication, and a wireless LAN communication module, and the second wireless communication unit 13 is Another one of the wireless communication modules different from the first wireless communication unit
Module. The frequencies used by the first wireless communication unit 12 and the second wireless communication unit 13 are different from each other. The short-range wireless communication unit is, for example, a wireless module that performs communication within a distance range of about 10 m with a maximum output of 1 mW in a power class 3 of the Bluetooth standard.

Here, the communication monitoring control function unit of the information processing apparatus 10 is configured as one function of a signal processing unit that also performs normal personal computer information processing. It may be configured as a separate communication monitoring control unit different from the above. 2 to 5, the same reference numerals are given to the same or corresponding components as those in FIG.

If the application program to be started uses the wireless communication unit 12 or 13, the signal processing unit 11 selects one of the wireless communication units 12 and 13 to use and selects one of the wireless communication units to be used. Start up, data line 4
2 and a high frequency (RF) signal line 44 or via a data line 43 and a high frequency (RF) signal line 45, a transmission signal carrying data is supplied to the antenna 30, and a high frequency reception signal received from the antenna 30 is supplied. Receive data extracted from the signal.

The communication monitoring and control function of the signal processing unit 11 supplies a control signal to the resonance frequency control unit 20 via the control line 48 according to which of the radio communication units 12 and 13 operates. The resonance frequency of the narrow-band antenna 30 is controlled so as to match the communication band of the wireless communication unit to be used. Thus, by controlling the resonance frequency of the antenna 30 according to the wireless communication unit to be used, a small chip antenna 30 having a relatively narrow frequency pass band can be used.
Small size is required.

The resonance frequency characteristics of the small chip antenna 30 show different characteristics depending on the arrangement of surrounding members, and also vary depending on the surrounding conditions. During operation, the antenna resonance frequency is monitored and adjusted at a predetermined timing in order to compensate for deviations and variations in the antenna characteristics.

When a wireless LAN is used, a normal antenna for the wireless LAN has a wide bandwidth including a large number of frequency channels. In this embodiment, the wireless LAN bandwidth of the antenna 30 is a predetermined small number or a small number. The bandwidth can be limited to have a narrow bandwidth corresponding to one frequency channel, and the size of the antenna can be reduced accordingly. The smaller the bandwidth, the more sensitively the antenna resonance frequency responds to a slight shift in the resonance frequency, and greatly fluctuates. The communication monitoring and control unit operates to compensate for such variation in the antenna resonance frequency. I do.

FIG. 2A shows a circuit configuration of the first embodiment of the present invention. 2A includes a coarse adjustment digital-analog converter 21 and a fine adjustment digital-analog converter 22, and a coarse adjustment variable capacitor (capacitor) connected in parallel to the antenna 30. C1n and variable capacitor C2m for fine adjustment
And a changeover switch SW. Antenna 30
In addition to these capacitors, an inductor may be coupled in series. The signal processing unit 11 controls the control signal line 4
8, a control signal is supplied to the changeover switch SW and the digital-analog converters 21 and 22. The digital-analog converters 21 and 22 convert the control data for impedance adjustment received from the monitoring control unit of the signal processing unit 11 from digital to analog, and adjust the capacitance of the capacitors C1n and C2m. The input impedance of the antenna 30 and its frequency characteristics change according to the capacitance values of the capacitors C1n and C2m.

FIG. 3 shows the signal processing unit 11 shown in FIGS.
2 shows a processing flow executed by the communication monitoring control function of FIG. The communication monitoring control function of the signal processing unit 11 will be described below with reference to FIG.

In step 301 of FIG. 3, when the signal processing unit 11 activates an application program using the radio communication unit 12 or 13, the signal processing unit 11
The communication monitoring control function detects which of the wireless communication units 12 and 13 the application program using the wireless communication unit has been started by referring to the program name or the like, for example. Here, it is assumed that an application using the wireless communication unit 12 has been activated. However, in the following description, the case where the application using the other wireless communication unit 13 is started is shown in parentheses ().

The application programs using the radio communication units 12 and 13 include, for example, an e-mail transmission / reception application for transmitting / receiving e-mail using a PDC module as the radio communication unit, and a wireless module conforming to the Bluetooth standard as the radio communication unit. A data transfer application that transmits and receives data to and from peripheral devices such as digital cameras and printers or information processing devices such as an electronic organizer PDA, and other devices that use a wireless module conforming to the wireless LAN standard as a wireless communication unit. There is a data transfer application for transmitting / receiving data to / from an information processing device.

In step 303, the signal processing unit 11
Is set so that the antenna changeover switch SW is switched to the signal line 44 (45) of the wireless communication unit 12 (13) corresponding to the application via the control line 48. In addition, the communication monitoring control function is to provide the digital-to-analog converters 21 and 22 for antenna adjustment with the initial value (or default value) of each adjustable variable element corresponding to the antenna resonance frequency for the wireless communication unit 12 (13). ), Ie, variable capacitors C1n and C1n
Initial values in digital form representing the respective control capacitance values of 2m are supplied to the control terminals of the variable capacitors C1n and C2m. Digital to analog converters 21 and 2
2 converts the digital initial value data into an analog signal and supplies it to capacitors C1n and C2m. The capacitance of the capacitors C1n and C2m is adjusted according to the analog signal.

As an initial value of the variable capacitor C1n for coarse adjustment, control value data C11 (C12) representing a rough capacitance of the capacitor C1n is used. The initial value of the variable capacitor C2m for fine adjustment, may be used a value C2m 0 representing the capacity of the intermediate (middle) value of the variable capacitance range of the capacitor C2m. Alternatively, as an initial value of the fine adjustment capacitor C2m, the total capacitance Ct = C11 + C2m (Ct = C12 + C2m) of both capacitors is a regular value corresponding to the antenna resonance frequency for the wireless communication unit 12 (13), that is, a predetermined design. A value that becomes a value may be used. If the last set value of the capacitor C2m when the wireless communication unit 12 (13) was used last time is stored in the memory as the initial value of the capacitor C2m, the last set value may be used. Good.

Next, in step 305, when the signal processing unit 11 starts data communication with another device via the wireless communication unit 12 (13), the communication monitoring control function detects the start of communication. Thereafter, the signal processing unit 11 transfers the baseband data to and from the wireless communication unit 12 (13) via the data line 42 (43). Wireless communication unit 12
(13) supplies and receives a high frequency (RF) signal with the resonance frequency control unit 20 via the signal line 44 (45).

In step 307 following step 305, the communication monitoring control function determines whether the communication has been completed. At first, the communication has not been completed yet, so the flow proceeds to step 309. In step 309, the communication monitoring control function determines whether it is time to monitor the communication state of the wireless communication unit 12 (13) during the communication operation and adjust the antenna resonance frequency. The procedure consists of steps 307 and 3 until the timing of its monitoring and adjustment comes.
The loop of 09 is repeated.

On the other hand, when it is time to perform the communication state monitoring and the antenna resonance frequency adjustment, the process proceeds to step 311 for the next communication monitoring and adjustment. After executing step 311, the process returns to step 307. The timing of proceeding from step 309 to step 311 is, for example, the timing immediately after proceeding from step 307 after the start of data transmission and reception of step 305 to step 309, and the procedure returns from step 311 to step 307 after the second time. The timing may be a predetermined delay time (for example, 5 seconds or 1 minute) after the delay. As an alternative method, the second and subsequent timings may occur periodically at a time interval of, for example, 5 seconds or 1 minute, or a predetermined timing in a data transmission control procedure with another information processing apparatus. , For example, timing for each packet transmission or timing for a predetermined number of time slots.

In step 311, the signal processing unit 11
The monitoring control function monitors the communication quality of the wireless communication unit 12 (13), such as the error rate of received data, and fine-tunes the antenna resonance frequency f so that the communication quality is optimized. Since a typical wireless communication unit includes an error correction function and can calculate an error rate, the supervisory control function only needs to extract the error rate from the wireless communication unit. Because of its fine adjustment, the monitoring and control function is digital-
Variable capacitor C for fine adjustment via analog converter 22
Adjust the capacitance value of 2m.

One of the fine adjustments of the antenna resonance frequency f
As a method, the monitoring control function determines the value of the capacitor C2m.
With the current value (for example, C2m0) To the maximum value (C
2m 0+ ΑL) And the minimum value in the negative direction (C2m0
α-L) (However, αLAnd α-L> 0, L: positive
Integer) Change each level step by step.
Quality of the wireless communication unit 12 (13) at this level
And the variable capacitor C2m has the highest communication quality.
Set the capacity value so that

FIG. 2B shows an antenna according to a control signal.
The change of the frequency characteristic of input impedance is shown.
Sum of the initial values of the set of variable capacitors (C11, C2m)
The capacity is Ct = C11 + C2m corresponding to the wireless communication unit 12.
0When the antenna input impedance is
(B) The center characteristic in the plurality of frequency characteristic curves on the left side
And the resonance frequency f of the antenna 30 is f1.
Then, the value of the capacitor C2m is shifted one level (control) in the positive direction.
Control level), the resonance frequency f becomes f
1 → f1 + α1→ f1 + α2→ ・ ・ ・ → f1 + αLAnd strange
Become However, 0 <α12<... <αLIt is.
Further, the value of the capacitor C2m is decreased by one level in the negative direction.
As it is reduced, the resonance frequency f becomes f1 → f1-α-1
→ f1-α-2→ ・ ・ ・ → f1-α-LAnd change. However
And 0 <α-1-2<... <α-LAnd Further
And αn= Α-N= Nα (α1=
α -1= Α, α2= Α-2= 2α, ..., αL= Α
-L= Lα).

On the other hand, a set of variable capacitors (C11, C2
m), the total capacity of the initial value corresponds to C
When t = C12 + C2m 0 (C11 <C1
2) Assuming that the antenna input impedance shows the central characteristic among the plurality of frequency characteristic curves on the right side of FIG. 2B, and the resonance frequency f of the antenna 30 is f2 (f1
<F2), as the value of the capacitor C2m is increased by one level in the positive direction, the resonance frequency f becomes f2 → f2 + β
1 → f2 + β 2 →... → f2 + β L Note that 0 <β 12 <... <Β L. Further, as the value of the capacitor C2m is decreased by one level in the negative direction, the resonance frequency f becomes f2 → f2-β −1 → f2-β
−2 → ... → f2-β− L However, 0 <β
−1 <β− 2 <... <β− L . Further, β n =
It is preferable that β− n = nβ (β 1 = β −1 =
β, β 2 = β −2 = 2β,..., β L = β− L = L
β).

As described above, the communication monitoring function of the signal processing unit 11 monitors and stores the communication quality of the wireless communication unit at each level of the capacitor C2m, and indicates the value of the capacitor C2m to indicate the highest communication quality. Set to the value when

As an alternative, the supervisory control function is:
The value of the capacitor C2m is changed from the present value by one level in each of the positive direction and the negative direction, and the radio communication unit 12 (1
3) The communication quality of each level is monitored, the communication quality is monitored by further changing the communication quality by one level in the direction of higher communication quality, and this operation is repeated to obtain the capacity value C2m at which the communication quality becomes the highest. May be set.

As an alternative, the supervisory control function is:
The current communication quality (for example, reception error rate) of the wireless communication unit 12 (13) may be monitored, and the above-described fine adjustment may be performed only when the quality is lower than a predetermined quality.

After step 311, the procedure proceeds to step 30.
Return to 7. If it is determined in step 307 that the communication has been completed, the routine exits from the routine of FIG.

FIG. 4 shows a second embodiment of the present invention. In FIG. 4, a resonance frequency control unit 20 includes a coarse adjustment digital-analog converter 21 and a fine adjustment digital-analog converter 22, and a coarse adjustment variable inductor (coil) L <b> 1 n connected in series to an antenna 30. Variable inductor L2m for fine adjustment and changeover switch S
W. In addition to these inductors, a capacitor may be coupled to the antenna 30 in parallel. The variable inductors L1n and L2m have their inductance adjusted in a manner similar to that described with reference to FIGS. 2 and 3, and the antenna resonance frequency is adjusted. A specific control mode of the variable inductors L1n and L2m will be omitted because it is obvious to those skilled in the art.

FIG. 5 shows still another embodiment of the present invention. In FIG. 5, the resonance frequency control unit 20 has a digital-analog converter 25 for adjusting the antenna resonance frequency, a metal plate 37 for adjusting the antenna resonance frequency, and an output supplied from the digital-analog converter 25. A servo controller 26 for moving the metal plate 37 with respect to the chip antenna 30, a ground point (ground) 39,
A capacitor C5 connected in parallel with antenna 30 and / or an inductor L connected in series with antenna 30;
5, a coaxial cable 35 coupled to the antenna 30,
And a switch SW for connecting one of the wireless communication units 12 and 13 to the coaxial cable 35. The metal plate 37 and the outer layer conductor of the coaxial cable 35 are connected to the ground point 39. In the resonance frequency control unit 20, only one of the capacitor C5 and the inductor L5 may be provided. The signal processing unit 11 supplies a control signal to the changeover switch SW and the digital-analog converter 25 via the control signal line 48.

In FIG. 5, the metal plate 37 is a small chip.
The antenna resonance frequency f decreases as approaching the antenna 30, and increases as the metal plate 37 moves away from the antenna 30. In this embodiment, the antenna resonance frequency f is adjusted from the correlation between the distance D between the metal plate 37 and the antenna 30 and the antenna resonance frequency f.

Also in the embodiment shown in FIG.
The communication monitoring function 1 executes the processing according to the flowchart of FIG. Steps 301 and 305 to 309 in FIG. 3 operate in the same manner as the case described with reference to FIG. The communication monitoring control function is performed in step 303
In, the antenna changeover switch SW is set to the signal line 44 (45) of the wireless communication unit 12 (13) corresponding to the started application via the control line 48.
The communication monitoring function is provided by the digital-analog converter 2.
An initial value of the adjustment element corresponding to the antenna resonance frequency for the wireless communication unit 12 (13), that is, a digital initial value indicating the distance D of the metal plate 37 to the antenna 30 is supplied to 1 and 22. The initial value may be set to an intermediate value of the variable adjustment range, a regular value, or the last set value of the previous time, as described with reference to FIG.

The communication monitoring function of the signal processing unit 11 is as follows.
In step 311 of FIG. 3, in the same manner as described above, at different predetermined monitoring and control timings, different distances D of the metal plate 37 with respect to the antenna 30 are changed stepwise to obtain respective distances D. Monitor and store the communication quality of the wireless communication unit 12 (13) at
The distance D is set to a value when the wireless communication unit 12 (13) shows the highest communication quality.

In the embodiment described above, the resonance frequency of the antenna is adjusted according to the activated application. However, when the wireless communication card is inserted into a card slot (not shown) of When set to the position 12 or 13, the communication monitoring control unit of the information processing apparatus 10 determines the type of the card or the communication standard, and according to the determination result, sets the antenna 30 May be adjusted.

The embodiments described above are given only as typical examples, and modifications and variations thereof will be apparent to those skilled in the art, and those skilled in the art will appreciate the principles of the present invention and the scope of the invention described in the claims. Obviously, various modifications of the above-described embodiment can be made without departing from the invention.

(Supplementary Note 1) An information processing apparatus including at least one wireless communication unit, an antenna, and a monitoring control function unit, wherein the monitoring control function unit communicates with the one wireless communication unit. And changing the resonance frequency of the antenna to monitor the communication state of the one wireless communication unit, and adjusting the resonance frequency of the antenna according to the communication state. Information processing device. (Supplementary note 2) The apparatus according to supplementary note 1, wherein the communication state is a received signal quality of the one wireless communication unit. (Supplementary note 3) The apparatus according to supplementary note 2, wherein the monitor control function unit adjusts a resonance frequency of the antenna when the received signal quality is lower than an allowable level. (Supplementary note 4) The apparatus according to supplementary note 1, wherein the antenna is a narrow band antenna. (Supplementary Note 5) A variable element is connected to the antenna, and the monitoring control function unit adjusts a resonance frequency of the antenna by changing a reactance of the variable element. The apparatus according to claim 1. (Supplementary Note 6) A metal body capable of changing a distance with respect to the antenna is provided, and the monitoring control function unit adjusts a resonance frequency of the antenna by changing the distance. The apparatus according to claim 1, wherein: (Supplementary Note 7) The monitor control function unit adjusts a resonance frequency of the antenna according to which of the plurality of wireless communication units is connected to the antenna. The apparatus according to claim 1, wherein (Supplementary Note 8) The monitoring control function unit connects a corresponding one of a plurality of wireless communication units to the antenna according to a started application and adjusts a resonance frequency of the antenna. The apparatus according to claim 1, wherein: (Supplementary Note 9) An information processing apparatus including a plurality of wireless communication units, an antenna, and a monitoring control function unit, wherein the monitoring control function unit is one of the plurality of wireless communication units. An information processing device for adjusting a resonance frequency of the antenna according to a started application when is connected to the antenna. (Supplementary Note 10) A communication monitoring control program for an information processing device, wherein the information processing device includes at least one wireless communication unit, an antenna, and a processor. During communication, the step of monitoring the communication state of the one wireless communication unit by changing the resonance frequency of the antenna, and the step of adjusting the resonance frequency of the antenna according to the communication state, Characterized by causing a processor to execute,
program. (Supplementary note 11) The program according to supplementary note 10, wherein the communication state is a received signal quality of the one wireless communication unit. (Supplementary Note 12) The step of adjusting includes adjusting a resonance frequency of the antenna according to which of the plurality of wireless communication units is connected to the antenna. 11. The apparatus according to claim 10, wherein (Supplementary Note 13) The step of adjusting includes adjusting a resonance frequency of the antenna by connecting a corresponding one of a plurality of wireless communication units to the antenna according to an activated application. 11. The program according to supplementary note 10, wherein the program includes: (Supplementary Note 14) A communication monitoring control program for an information processing device, wherein the information processing device includes a plurality of wireless communication units, an antenna, and a processor. When one of the wireless communication units is connected to the antenna, the step of adjusting the resonance frequency of the antenna according to the activated application is performed by the processor.
program.

[0052]

According to the present invention, the resonance frequency of the antenna in the information processing apparatus can be adjusted by the above-described features, and the space occupied by the antenna in the information processing apparatus can be reduced as much as possible.

[Brief description of the drawings]

FIG. 1 shows a basic circuit configuration of an information processing apparatus according to the present invention.

FIG. 2A shows a circuit configuration of the first embodiment of the present invention. FIG. 2B shows a frequency characteristic of the antenna input impedance according to the control signal.

FIG. 3 shows a processing flow for adjusting a resonance frequency executed by a communication monitoring control function of a signal processing unit.

FIG. 4 shows another embodiment of the present invention.

FIG. 5 shows yet another embodiment of the present invention.

FIG. 6A is a perspective view showing an arrangement in which a personal computer is provided with a plurality of wireless transceiver modules and a plurality of small chip antennas without using the present invention. ing. FIG. 6B shows a case where a personal computer is provided with a plurality of wireless transmission / reception modules and one small chip antenna without using the present invention, and each module is coupled to the antenna via a changeover switch. The arrangement in such a configuration is shown in the form of a perspective view.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 information processing device 11 signal processing unit 12 first wireless communication unit 13 second wireless communication unit 15 storage device 20 antenna resonance frequency control unit 30 antenna SW changeover switch

Claims (5)

[Claims]
1. An information processing apparatus comprising at least one wireless communication unit, an antenna, and a supervisory control function unit, wherein the supervisory control function unit communicates when the one wireless communication unit is communicating. Wherein the resonance frequency of the antenna is changed to monitor the communication state of the one wireless communication unit, and the resonance frequency of the antenna is adjusted in accordance with the communication state. apparatus.
2. The monitoring control function unit adjusts a resonance frequency of the antenna according to which of the plurality of wireless communication units is connected to the antenna. The apparatus of claim 1.
3. An information processing device comprising a plurality of wireless communication units, an antenna, and a monitoring control function unit, wherein the monitoring control function unit is one of the plurality of wireless communication units.
An information processing apparatus, wherein when one of the wireless communication units is connected to the antenna, the resonance frequency of the antenna is adjusted in accordance with a started application.
4. A communication monitoring control program for an information processing device, the information processing device comprising: at least one wireless communication unit;
An antenna and a processor, when the one wireless communication unit is communicating, monitoring a communication state of the one wireless communication unit by changing a resonance frequency of the antenna; Adjusting the resonance frequency of the antenna in response to the program.
5. A communication monitoring control program for an information processing device, wherein the information processing device includes a plurality of wireless communication units, an antenna, and a processor, and one of the plurality of wireless communication units. A program, when the wireless communication unit is connected to the antenna, causing the processor to execute a step of adjusting a resonance frequency of the antenna according to a started application.
JP2001025568A 2001-02-01 2001-02-01 Information processor and communication monitoring and controlling program Pending JP2002232319A (en)

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