JP2002152077A - Card-type radio communication apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card-type radio communication apparatus which has a radio communication function where the lack of communication data and the deterioration of an error rate are prevented and which is miniaturized and thinned. SOLUTION: An analog circuit part 20 is provided with an input/output filter circuit 21 and a transmission/reception circuit 22 having a modulation/ demodulation function. A digital circuit part 30 is provided with an input/output base band signal processing circuit 31 having the input/output base band signal processing function of the analog circuit part 20, an interface circuit 33 and a control circuit 32 controlling the input/output base band signal processing circuit 31 and the interface circuit 33. A signal route S between the antenna 11 and the connector 13 is arranged on one face of a printed board 50 in an almost square shape so that it becomes an almost N shape or an opposite N shape in the order of the antenna 11, the input/output filter circuit 21, the transmission/reception circuit 22, the input/output base band signal processing circuit 31, the interface circuit 33 and the connector 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency hopping (Frequency Hoppin) which is connected to an information terminal device such as a personal computer and uses a spread spectrum technique.
g) A card-type wireless communication device having a wireless communication function using the method.

[0002]

2. Description of the Related Art Generally, in communication using spread spectrum technology, a modulated signal obtained by modulating an input baseband signal such as voice on a transmitting side is spread spectrum using a spreading code, and then a high frequency signal is transmitted. Is transmitted to the communication partner. On the receiving side, the spread spectrum signal received from the communication partner is demodulated (despread) using the same spreading code as that on the transmitting side.

[0003] Communication systems using spread spectrum technology include Direct Spread (Direct Spread).
d) There is a method and a frequency hopping method. In the direct spreading method, spreading is performed while multiplying a narrow band modulated wave by a spreading code, and a certain continuous frequency band is used uniformly. On the other hand, the frequency hopping method spreads a signal within a frequency band by randomly switching the frequency of a carrier wave at the time of performing communication with a communication partner using a spreading code. For example, Bluetooth (Bluetooth)
Etc.

FIG. 4 is a block circuit diagram showing a schematic configuration of a conventional card-type wireless communication device. The conventional card-type wireless communication device 10 of FIG. 4 has the following circuit configuration.
The antenna 11 is connected to an input / output filter circuit 21, and a reception amplification circuit 23 and a transmission amplification circuit 24 are connected to the input / output filter circuit 21.

[0005] The reception amplification circuit 23 includes a mixer circuit 25a,
It is connected to an input / output baseband signal processing circuit 31 via a demodulation circuit 27. The transmission amplifier circuit 24
It is connected to an input / output baseband signal processing circuit 31 via a mixer circuit 25b and a modulation circuit. And
A local oscillator 26 is connected to the mixer circuits 25a and 25b.

[0006] Further, the reception amplification circuit 23, the transmission amplification circuit 2
4. The transmitting / receiving circuit 22 including the mixer circuits 25a and 25b, the demodulation circuit 27, and the modulation circuit 28 includes a first oscillator 29
Is connected.

The input / output baseband signal processing circuit 3
1 is a connector 1 via the interface circuit 33.
3, a control circuit 32 is connected to the input / output baseband signal processing circuit 31 and the interface circuit 33, and a second oscillator 34 is connected to the interface circuit 33. The power supply circuit section 12
Are connected to the connector 13 and each of the above circuits of the card-type wireless communication device 10.

Next, the operation of the conventional card type radio communication device 10 shown in FIG. 4 will be described. On the receiving side, the spread spectrum signal (for example, 2.4 GHz band) received from the communication partner side by the antenna 11 is transmitted to the input / output filter circuit 2.
1 and the reception amplification circuit 23 amplify only the reception high-frequency signal in the desired frequency band and apply it to the mixer circuit 25a. The received high-frequency signal is demodulated into a baseband signal by a mixer circuit 25 a and a demodulation circuit 27, necessary signal processing is performed by an input / output baseband signal processing circuit 31, and a personal computer (not shown) is connected to the connector 13 via an interface circuit 33. It is output to an information terminal device such as a computer.

On the transmitting side, an input signal such as voice input from an information terminal device such as a personal computer (not shown) via the connector 13 and the interface circuit 33 is subjected to necessary signal processing by an input / output baseband signal processing circuit 31. Is performed, and a spread spectrum signal (for example, 2.4 G) is output by the modulation circuit 28 and the mixer circuit 25b.
(Hz band) and then the transmission amplification circuit 2
The frequency component outside the transmission frequency band is removed by the input / output filter circuit 21 and transmitted from the antenna 11 to the communication partner side.

The control circuit 32 controls the operation of the input / output baseband signal processing circuit 31 and the interface circuit 33. The power supply circuit section 12 is connected to the information terminal device such as a personal computer (not shown) via the connector 13. The supplied power is converted into a power supply voltage necessary for the operation of each circuit inside the card-type wireless communication device 10 and a power supply having a voltage suitable for each circuit is supplied.

The local oscillator 26 includes mixer circuits 25a, 25
5b each generate a frequency signal (eg, 2.4 GHz) necessary for operation. Further, the first oscillator 29 generates a frequency signal (for example, 32 KHz) necessary for the transmission / reception circuit 22 to operate. Further, the second oscillator 34 generates a frequency signal (for example, 14 MHz) necessary for the interface circuit 33 to operate.

[0012]

However, in the above prior art, when each circuit described in the conventional card type radio communication device 10 of FIG. 4 is arranged on one small printed circuit board, the following problem occurs. Due to the mutual interference of signals between the circuits and the mixing of different signals as described above, there has been a problem that communication data is lost or an error rate is deteriorated.

That is, digital signal noise generated from the input / output baseband signal processing circuit 31, the control circuit 32, and the interface circuit 33 enters the antenna 11 and the transmission / reception circuit 22.

Also, noise superimposed on the power supplied from an information terminal device such as a personal computer (not shown) connected to the connector 13 is generated from the connection pattern between the connector 13 and the power supply circuit section 12 on the printed circuit board. Then, it is mixed into the antenna 11 and the transmission / reception circuit 22.

A frequency signal (for example, 32 KHz) generated from the first oscillator 29 and its harmonic signal noise enter the antenna 11 and the transmission / reception circuit 22.

Digital noise generated from a connection pattern on a printed circuit board connecting between the control circuit 32 and the input / output baseband signal processing circuit 31 and between the control circuit 32 and the interface circuit 33 is generated by the antenna 1.
1 and the transmission / reception circuit 22.

Further, a frequency signal (for example, 14 MHz) generated from the second oscillator 34 and its harmonic signal noise may be mixed into the antenna 11 and the transmission / reception circuit 22.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to divide each circuit into circuit blocks for each function, and further devise a method of arranging each circuit block. Card-type wireless communication that has reduced size and thickness and has a wireless communication function that prevents loss of communication data and deterioration of the error rate by reducing mutual interference of signals between circuits and mixing of different signals. It is intended to provide a device.

[0019]

In order to solve the above problems, the present invention is connected to an information terminal device, and comprises an antenna,
An analog circuit unit having an input / output filter function and a modulation / demodulation function, a digital circuit unit having an input / output baseband signal processing function of the analog circuit unit, an interface function between the information terminal devices, and a control function of controlling these, and a power supply A card-type wireless communication device in which a circuit unit and a connector for connecting to the information terminal device are disposed on one surface of a substantially rectangular printed circuit board, and the edge portion of one side of the printed circuit board is provided. The connector is provided, the power supply circuit unit is provided in proximity to the connector, the antenna is provided in proximity to a side opposite to the side on which the connector is provided, and the connector is provided. The analog circuit portion is disposed in proximity to one side adjacent to the provided one side, and the digital circuit is disposed in proximity to another side adjacent to the one side in which the connector is disposed. Is characterized in that Le circuit portion is disposed.

According to the present invention, in the above card-type wireless communication apparatus, the analog circuit section includes an input / output filter circuit having an input / output filter function and a transmission / reception circuit having a modulation / demodulation function. An input / output baseband signal processing circuit having an input / output baseband signal processing function of the analog circuit unit, an interface circuit having an interface function between the information terminal devices, the input / output baseband signal processing circuit, and the interface circuit And a signal path between the antenna and the connector is substantially N in the order of the antenna, the input / output filter circuit, the transmission / reception circuit, the input / output baseband signal processing circuit, the interface circuit, and the connector. Characterized by being arranged so as to be in the shape of a letter or a substantially inverted letter N. It is intended.

Further, the present invention provides the above card-type wireless communication device, further comprising a first oscillator related to the transmission / reception circuit, wherein the first oscillator has one side adjacent to the side where the connector is provided and the other side adjacent to the side where the connector is provided. , And the control circuit is provided at a corner opposite to the corner where the first oscillator is provided.

Further, according to the present invention, in the above-mentioned card type radio communication device, the second type related to the interface circuit is provided.
The second oscillator is disposed substantially at the center of the printed circuit board, and the transmitting / receiving circuit and the interface circuit are disposed on both sides of the second oscillator with the second oscillator interposed therebetween. It is characterized by having been established.

According to the present invention, in the above card-type wireless communication device, the other of the analog circuit section, the digital circuit section, and the power supply circuit section, which are provided on one surface of the printed board, sandwiches the printed board. The first ground pattern is provided so as to cover almost all of the surface.

The present invention also provides the card-type wireless communication device, wherein the printed board is a laminated board including a front layer, an intermediate layer, and a back layer. A second ground pattern related to the analog circuit unit is provided between the first and second circuits, and a signal pattern for connecting signals between circuits related to the digital circuit unit is provided on the intermediate layer. Is what you do.

According to the present invention, in the above card-type wireless communication device, the second ground pattern covers substantially all of a portion overlapping the analog circuit portion provided on one surface of the printed circuit board. It is characterized by being arranged as follows.

According to the present invention, in the above card-type wireless communication apparatus, in the inner layer pattern provided with a signal pattern for connecting a signal between circuits related to the digital circuit section, one of the printed circuit boards is provided. A third ground pattern related to the transmission / reception circuit is provided so as to cover almost all of the portion overlapping the transmission / reception circuit provided on the surface of
Ground for the transmitting / receiving circuit, the first ground pattern,
The second ground pattern and the third ground pattern are connected by a plurality of through-hole holes.

According to the present invention, there is provided the above-mentioned card-type radio communication apparatus, wherein the frequency band of the high-frequency signal transmitted and received from the antenna is in the 2.4 GHz band, and a frequency hopping method using a spread spectrum technique is used. It is characterized by having.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing the arrangement of each circuit on a printed circuit board of the card-type wireless communication device of the present embodiment. FIG. 2 is a diagram showing the laminated board of the card-type wireless communication device of the present embodiment. And FIG. 3 is a block circuit diagram showing a schematic configuration of a card-type wireless communication device according to the present embodiment.

The circuit configuration and operation of the card-type wireless communication device 1 of this embodiment shown in FIG. 3 will be described. The card-type wireless communication device 1 of the present embodiment is different from the conventional card-type wireless communication device 10 of FIG. 4 only in that each configured circuit is separated into a circuit block for each function. Since the circuits and the connections between the circuits are the same, the same parts as those in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted. Differences from FIG. 4 will be described below.

The card-type wireless communication device 1 of the present embodiment is
An antenna 11, an analog circuit unit 20 having an input / output filter function and a modulation / demodulation function, and the analog circuit unit 20
A digital circuit unit 30 having an input / output baseband signal processing function, an interface function between information terminal devices such as a personal computer (not shown) connected to the connector 13, and a control function for controlling these;
2 and a connector 13 for connecting to an information terminal device such as the personal computer.

The analog circuit section 20 comprises an input / output filter circuit 21 having an input / output filter function and a transmission / reception circuit 22 having a modulation / demodulation function, and has a first oscillator 29 related to the transmission / reception circuit 22. ing.

The digital circuit section 30 is an interface between an input / output baseband signal processing circuit 31 having an input / output baseband signal processing function of the analog circuit section 20 and an information terminal device such as a personal computer (not shown). Interface circuit 3 having functions
3 and a control circuit 30 for controlling the input / output baseband signal processing circuit 31 and the interface circuit 33.
Oscillator 34 is provided.

The transmission / reception circuit 22 includes a reception amplification circuit 23, a transmission amplification circuit 24, and mixer circuits 25a and 25.
b, a local oscillator 26, a demodulation circuit 27 and a modulation circuit 28.

FIG. 1 is a schematic view showing the arrangement of each circuit on a printed circuit board of the card-type wireless communication device 1 of the present embodiment, and FIG. 1 (a) is a plan view seen from one surface of the printed circuit board. It is a figure, (b) is a side view of the said printed circuit board,
(C) is a plan view of the printed circuit board as viewed from the other surface. Next, the arrangement of each circuit on the printed circuit board 50 of the card-type wireless communication device 1 of the present embodiment will be described with reference to FIG.

FIG. 1A shows a state in which the same circuit configuration as that of the card-type wireless communication device 1 described with reference to FIG. 3 is arranged on one surface of a substantially rectangular printed circuit board 50. A connector 13 is disposed on one side edge of the printed circuit board 50, a power supply circuit unit 12 is disposed close to the connector 13, and a connector 13 is disposed close to a side opposite to the side on which the connector 13 is disposed. An antenna 11 is provided, an analog circuit unit 20 is provided near one side adjacent to the side on which the connector 13 is provided, and an analog circuit unit 20 is provided adjacent to another side adjacent to the one side on which the connector 13 is provided. In addition, a digital circuit unit 30 is provided.

That is, the input / output baseband is provided by combining the circuit blocks of the analog circuit section 20 and the digital circuit section 30 and disposing them in close proximity to the opposing sides adjacent to one side on which the connector 13 is disposed. Digital signal noise generated from the signal processing circuit 31, the control circuit 32, and the interface circuit 33 can be reduced.

Further, by disposing the power supply circuit section 12 close to the connector 13, the connection pattern between the connector 13 and the power supply circuit section 12 on the printed circuit board 50 is shortened, and the connection pattern (not shown) connected to the connector 13 is formed. Noise superimposed on a power supply supplied from an information terminal device such as a personal computer causes the connector 1
Generation from the connection pattern between the power supply circuit 3 and the power supply circuit unit 12 can be reduced.

Further, by disposing the antenna 11 close to the side opposite to the side on which the connector 13 is disposed, the distance between the connector 13 and the antenna 11 is maximized on the printed circuit board 50. Accordingly, it is possible to reduce noise that enters the antenna 11 from the information terminal device such as a personal computer (not shown) connected to the connector 13 via the connector 13.

Therefore, communication data loss or error caused by mixing the digital signal noise, the noise superimposed on the power supply, and the noise entering through the connector 13 into the antenna 11 and the transmission / reception circuit 22. The rate can be prevented from deteriorating.

In FIG. 1A, the antenna 11
The signal path S between the antenna 1 and the connector 13
1, an input / output filter circuit 21, a transmission / reception circuit 22, an input / output baseband signal processing circuit 31, an interface circuit 33, and a connector 13 are arranged in the order of an inverted N-shape in this order.

Therefore, the antenna 11 and the connector 13
In comparison with the case where the signal path S between the antenna 1 and the
1 and the length of the connector 13 in the direction are shortened, and the card-type wireless communication device 1 is attached via a connector 13 to an information terminal device such as a personal computer (not shown).
The area of a portion of the card-type wireless communication device 1 that goes outside from the information device main body is reduced, and the usability of the information device with the card-type wireless communication device 1 attached to the information device can be improved.

In FIG. 1A, the antenna 11
The signal path S between the antenna 1 and the connector 13
1, an example is shown in which the input / output filter circuit 21, the transmission / reception circuit 22, the input / output baseband signal processing circuit 31, the interface circuit 33, and the connector 13 are arranged so as to have a substantially inverted N-shape in this order. The same effect can be obtained even if they are arranged so as to be substantially N-shaped.

In FIG. 1A, the transmission / reception circuit 2
The first oscillator 29 relating to 2 is disposed at one corner between one side where the connector 13 is disposed and one side adjacent thereto,
The control circuit 32 is provided at a corner opposite to one corner where the first oscillator 29 is provided.

That is, by disposing the first oscillator 29 at the one corner of the printed circuit board 50, the distance between the first oscillator 29 and the antenna 11 can be maximized on the printed circuit board 50. The frequency signal (for example, 32 KHz) and the harmonic signal noise generated from the first oscillator 29 can be prevented from being mixed into the antenna 11 and the transmission / reception circuit 22.

Further, by arranging the control circuit 32 at a corner opposite to one corner where the first oscillator 29 is arranged, the signal path S between the antenna 11 and the connector 13 is provided as described above. , In a state of being arranged in a substantially inverted N-shape,
Since the control circuit 32 and the input / output baseband signal processing circuit 31 and the interface circuit 33 can be arranged close to each other, the control circuit 32 and the input / output baseband signal processing circuit 31 and the control circuit 32 Digital noise generated from a connection pattern on a printed circuit board that connects between the antenna 11 and the interface circuit 33 can be prevented from entering the antenna 11 and the transmission / reception circuit 22.

Therefore, the frequency signal generated from the first oscillator 29 and the harmonic signal noise are output to the control circuit 3
Digital noise generated from a connection pattern on a printed circuit board connecting between the control circuit 2 and the input / output baseband signal processing circuit 31 and between the control circuit 32 and the interface circuit 33 enters the antenna 11 and the transmission / reception circuit 22. This can prevent the loss of communication data and the deterioration of the error rate caused by this.

In FIG. 1A, a second oscillator 34 related to the interface circuit 33 is disposed substantially at the center of the printed circuit board 50, and the transmission / reception circuit 22 and the interface circuit 34 The second oscillator 34 is disposed on both sides of the oscillator 34.

That is, by arranging the second oscillator 34 and the interface circuit 33 close to each other, a connection pattern on the printed circuit board for connecting the second oscillator 34 and the interface circuit 33 is shortened, The frequency signal (for example, 14 MHz) generated by the second oscillator 34 and the harmonic signal noise can be prevented from being mixed into the antenna 11 and the transmission / reception circuit 22 via the connection pattern.

Therefore, the frequency signal generated by the second oscillator 34 and the harmonic signal noise are mixed into the antenna 11 and the transmission / reception circuit 22 via the connection pattern, resulting in loss of communication data and error rate. Deterioration can be prevented.

The transmission / reception circuit 22 and the interface circuit 33 are disposed on both sides of the second oscillator 34 with the second oscillator 34 interposed therebetween, and the transmission / reception circuit 22 and the interface circuit 33 are 2 by the oscillator 34, the digital noise generated from the interface circuit 33 is
2 can be reduced.

Therefore, it is possible to prevent loss of communication data and deterioration of an error rate caused by digital noise generated from the interface circuit 33 entering the transmission / reception circuit 22.

FIG. 1C shows a state in which the first ground pattern 50b is provided on the other surface of the printed circuit board 50. The first ground pattern 50b is provided on one surface of the printed circuit board 50. A first ground pattern is provided so as to cover almost all of the other surfaces of the analog circuit section 20, the digital circuit section 30, and the power supply circuit section 12 that sandwich the printed circuit board 50.

That is, the analog circuit section 20 and the digital circuit section 3 provided on one surface of the printed circuit board 50
By disposing the first ground pattern so as to cover almost the entire surface of the printed circuit board 50 and the other side of the power supply circuit unit 12 sandwiching the printed circuit board 50, the other surface of the printed circuit board 50 can be connected to the first ground. The noise from the digital circuit unit 30 and the power supply circuit unit 12 is electromagnetically shielded by the pattern,
Mixing into the analog circuit section 20 through the other surface of the printed circuit board 50 can be reduced.

Therefore, it is possible to prevent loss of communication data and deterioration of an error rate caused by noise from the digital circuit section 30 and the power supply circuit section 12 entering the analog circuit section 20 via the other surface of the printed circuit board 50. can do.

FIG. 1B shows the printed circuit board 50 of the card-type wireless communication device 1 of the present embodiment viewed from the side. The circuits of the antenna 11, the analog circuit unit 20, the digital circuit unit 30, and the power supply circuit unit 12 that constitute the card-type wireless communication device 1 are all disposed on one surface of the printed circuit board 50.

Therefore, the card type radio communication device 1
By arranging the circuits of the antenna 11, the analog circuit section 20, the digital circuit section 30, and the power supply circuit section 12 all on one surface of the printed circuit board 50, the thickness of the card type wireless communication device 1 can be reduced. Can be realized.

FIG. 2 is a schematic diagram showing the arrangement of ground patterns between layers when the printed circuit board 50 of the card-type wireless communication device 1 of the present embodiment is a laminated substrate.
(A) is a figure which shows arrangement | positioning of the 2nd earth pattern which concerns on an analog circuit part, (b) is a figure which shows arrangement | positioning of the 3rd earth pattern which concerns on a transmission / reception circuit, (c) is the said. It is sectional drawing of a laminated substrate. Next, with reference to FIG. 2, the arrangement of the ground pattern between the respective layers when the printed circuit board 50 of the card-type wireless communication device 1 of the present embodiment is a laminated substrate will be described.

FIG. 2C shows that the printed circuit board 50
FIG. 4 is a cross-sectional view of the printed circuit board 50 when a laminated substrate having layers is used. The printed board 50 includes a surface layer 51, intermediate layers 52, 53, 54, and a back layer 55. An inner layer pattern 56 is provided between the surface layer 51 and the intermediate layer 52. Inner layer pattern 5 between the intermediate layer 53
7, an inner layer pattern 58 is provided between the intermediate layer 53 and the intermediate layer 54, and an inner layer pattern 59 is provided between the intermediate layer 54 and the back layer 55.

The surface layer 51 and the intermediate layer 52
A second ground pattern 56a relating to the analog circuit section 20 is disposed in the inner layer pattern 56 between the intermediate layer 52 and the intermediate layer 53, and the inner layer pattern 57 between the intermediate layer 52 and the intermediate layer 53. Signal patterns for connecting signals between the circuits related to the digital circuit section 30 are provided in each of the inner layer patterns 58 between them.

That is, the analog circuit section 20 provided on one surface (for example, the surface) of the printed circuit board 50 shown in FIG. 1A and the digital circuit provided on the inner layer pattern 57 and the inner layer pattern 58, respectively. By arranging the second ground pattern 56a related to the analog circuit section 20 between a signal pattern for connecting signals between circuits related to the circuit section 30 and the analog circuit section 20 and the digital circuit section 30 Is electromagnetically shielded from a signal pattern for connecting a signal between the circuits related to the digital circuit unit 30, and digital noise generated from the signal pattern for connecting a signal between the circuits related to the digital circuit unit 30 is generated by the analog circuit unit. 20 can be reduced.

Further, by arranging signal patterns for connecting signals between the circuits related to the digital circuit section 30 to the inner layer pattern 57 and the inner layer pattern 58, respectively, one surface of the printed board 50 (for example, Digital circuit unit 30 compared to the case where
The digital noise generated from the signal pattern for connecting the signals between the circuits related to the above can be reduced from being mixed into the antenna 11 and the analog circuit section 20.

Therefore, communication data loss or error rate caused by digital noise generated from a signal pattern for connecting signals between circuits related to the digital circuit unit 30 to the antenna 11 and the analog circuit unit 20 is generated. Degradation can be prevented.

FIG. 2A shows the analog circuit section 20 in the inner layer pattern 56 between the surface layer 51 and the intermediate layer 52.
FIG. 6 is a view showing a state where a second ground pattern 56a according to the second embodiment is provided.
The printed circuit board 50 shown in FIG. 1A is provided so as to cover almost all of the portion overlapping with the analog circuit section 20 provided on one surface (for example, the front surface) of the printed circuit board 50.

That is, an analog circuit is provided between the analog circuit section 20 and a signal pattern for connecting signals between circuits related to the digital circuit section 30 provided in the inner layer pattern 57 and the inner layer pattern 58, respectively. Part 20
Is provided so as to cover almost all of the portion overlapping with the analog circuit section 20, thereby connecting signals between the circuits relating to the analog circuit section 20 and the digital circuit section 30. Is more reliably electromagnetically shielded from the signal pattern of the digital circuit unit 30, and the digital noise generated from the signal pattern for connecting the signal between the circuits related to the digital circuit unit 30 is more effectively mixed into the analog circuit unit 20. Can be effectively reduced.

Therefore, communication data loss or error rate caused by digital noise generated from a signal pattern for connecting signals between circuits related to the digital circuit unit 30 to the antenna 11 and the analog circuit unit 20 is generated. Degradation can be prevented.

FIG. 2B shows the inner layer pattern 57 in which a signal pattern for connecting signals between the circuits related to the digital circuit section 30 is provided. FIG. 3 is a view showing a state in which the third ground pattern 57a is provided;
It is provided so as to cover almost all of the portion overlapping the transmitting / receiving circuit 22 provided on one surface (for example, the front surface) of the printed circuit board 50 shown in FIG.

Also, in the inner layer pattern 58 provided with a signal pattern for connecting signals between the circuits related to the digital circuit section 30, the third pattern shown in FIG.
In the same manner as the earth pattern 57a, an earth pattern (not shown) is provided so as to cover almost the entire portion overlapping the transmission / reception circuit 22.

Further, as shown in FIG. 2C, the ground 50a of the transmitting / receiving circuit, the first ground pattern 50
b, the second ground pattern 56a and the third ground pattern 57a
0 is connected.

That is, in the inner layer pattern 57 and the inner layer pattern 58 provided with signal patterns for connecting signals between the circuits related to the digital circuit section 30, the third ground pattern 57a related to the transmitting / receiving circuit 22 is connected to the transmitting / receiving section. It is arranged so as to cover almost all the portion overlapping the circuit 22, and furthermore, the ground 50a, the first ground pattern 50b, the second ground pattern 56a and the third ground pattern 57a of the transmitting / receiving circuit are connected to each other. ,
By connecting through the plurality of through-holes 60, the transmission and reception circuit 22 and the signal pattern for connecting signals between the circuits related to the digital circuit unit 30 are more reliably electromagnetically shielded, and the digital circuit unit 30 The digital noise generated from the signal pattern for connecting the signals between the circuits related to the above can be reduced from being mixed into the transmission / reception circuit 22.

Accordingly, communication data loss or error rate caused by digital noise generated from a signal pattern for connecting signals between circuits related to the digital circuit unit 30 to the antenna 11 and the analog circuit unit 20 is generated. Degradation can be prevented.

In the above description, although the inner layer pattern 59 shown in FIG. 2C is not particularly described, the inner layer pattern 59 is formed in the same manner as the first ground pattern 50b shown in FIG. An earth pattern (not shown) may be provided.

In the above description, the case where a six-layer laminated board is used as the printed board 50 has been described as an example, but the present invention is not limited to this. For example, the intermediate layers 53 and 54 and the inner layer patterns 58 and 59 may be deleted to form a four-layer substrate.

[0074]

As described above, according to the present invention, an antenna, an analog circuit having an input / output filter function and a modulation / demodulation function, and an input / output baseband signal processing function of the analog circuit are provided. A digital circuit unit having an interface function between the information terminal devices and a control function for controlling them, a power supply circuit unit, and a connector for connecting to the information terminal device, on one side of a substantially rectangular printed circuit board; Wherein the connector is disposed at one edge of the printed circuit board, the power supply circuit is disposed adjacent to the connector, and the connector is disposed in the wireless communication device. The antenna is disposed in proximity to a side opposite to the provided side, and the analog circuit section is disposed in proximity to a side adjacent to the side on which the connector is disposed. Is set, and is characterized in that said digital circuit section in proximity to another side adjacent to one side the connector is disposed is disposed.

Therefore, according to the present invention, the analog circuit section and the digital circuit section are grouped into respective circuit blocks, and are arranged separately in close proximity to opposing sides adjacent to one side on which the connector is disposed. Digital signal noise generated from the output baseband signal processing circuit, control circuit, and interface circuit can be reduced.

By arranging the power supply circuit portion close to the connector, the connection pattern between the connector on the printed circuit board and the power supply circuit portion is shortened, and an information terminal such as a personal computer (not shown) connected to the connector is connected. Noise superimposed on the power supplied from the device can be reduced from being generated from the connection pattern between the connector on the printed circuit board and the power supply circuit.

Further, by arranging the antenna close to the side opposite to the side on which the connector is provided, the distance between the connector and the antenna is maximized on the printed circuit board. It is possible to reduce noise that enters the antenna from a connected information terminal device such as a personal computer (not shown) via the connector.

Therefore, the digital signal noise, the noise superimposed on the power supply, and the noise entering through the connector are mixed into the antenna and the transmission / reception circuit, resulting in loss of communication data and deterioration of an error rate. Can be prevented.

Further, according to the present invention, in the above card-type wireless communication apparatus, the analog circuit section includes an input / output filter circuit having an input / output filter function, a transmission / reception circuit having a modulation / demodulation function, and the digital circuit section. An input / output baseband signal processing circuit having an input / output baseband signal processing function of the analog circuit unit, an interface circuit having an interface function between the information terminal devices, the input / output baseband signal processing circuit, and the interface circuit And a signal path between the antenna and the connector is substantially N in the order of the antenna, the input / output filter circuit, the transmission / reception circuit, the input / output baseband signal processing circuit, the interface circuit, and the connector. Characterized by being arranged so as to be in the shape of a letter or a substantially inverted letter N. It is intended.

Therefore, according to the present invention, as compared with the case where the signal path S between the antenna and the connector is arranged in a straight line, the length of the outer shape of the printed circuit board in the direction of the antenna and the connector is reduced. In a state where the card-type wireless communication device is attached to an information terminal device such as a personal computer (not shown) via a connector, the area of a portion of the card-type wireless communication device coming out of the information device main body is reduced. In addition, the usability of the information device in a state where the card-type wireless communication device is attached to the information device can be improved.

Further, according to the present invention, in the above card-type radio communication device, a first oscillator related to the transmission / reception circuit is provided, and the first oscillator is connected to one side adjacent to the one side on which the connector is disposed. , And the control circuit is provided at a corner opposite to the corner where the first oscillator is provided.

Therefore, according to the present invention, by disposing the first oscillator at the one corner of the printed circuit board, the distance between the first oscillator and the antenna can be maximized on the printed circuit board. The frequency signal generated from the first oscillator and the harmonic signal noise can be prevented from being mixed into the antenna and the transmission / reception circuit.

Further, by arranging the control circuit at a corner opposite to one corner where the first oscillator is arranged, the signal path S between the antenna and the connector is substantially inverted N as described above. In a state where it is arranged so as to form a character, the control circuit,
A printed circuit board that connects between the control circuit and the input / output baseband signal processing circuit and between the control circuit and the interface circuit because the input / output baseband signal processing circuit and the interface circuit can be arranged close to each other. Digital noise generated from the above connection pattern can be reduced from being mixed into the antenna and the transmission / reception circuit.

Accordingly, a printed circuit board for connecting the frequency signal generated by the first oscillator and the harmonic signal noise thereto, between the control circuit and the input / output baseband signal processing circuit, and between the control circuit and the interface circuit. It is possible to prevent loss of communication data and deterioration of an error rate caused by digital noise generated from the above connection pattern mixed into the antenna and the transmission / reception circuit.

Further, according to the present invention, in the above-mentioned card type radio communication apparatus, the second type related to the interface circuit is provided.
The second oscillator is disposed substantially at the center of the printed circuit board, and the transmitting / receiving circuit and the interface circuit are disposed on both sides of the second oscillator with the second oscillator interposed therebetween. It is characterized by having been established.

Therefore, according to the present invention, by disposing the second oscillator and the interface circuit close to each other, the connection pattern on the printed circuit board connecting the second oscillator and the interface circuit can be shortened. That is, it is possible to reduce the possibility that the frequency signal and the harmonic signal noise generated from the second oscillator are mixed into the antenna and the transmission / reception circuit via the connection pattern.

Therefore, it is possible to prevent loss of communication data and deterioration of the error rate caused by mixing the frequency signal and the harmonic signal noise generated from the second oscillator into the antenna and the transmission / reception circuit via the connection pattern. can do.

Further, a transmission / reception circuit and an interface circuit are provided on both sides of the second oscillator with a second oscillator interposed therebetween, and the transmission / reception circuit and the interface circuit are separated by the second oscillator. Thereby, it is possible to reduce digital noise generated from the interface circuit from being mixed into the transmission / reception circuit.

Accordingly, it is possible to prevent loss of communication data and deterioration of an error rate caused by digital noise generated from the interface circuit entering the transmission / reception circuit.

Further, according to the present invention, in the above card-type wireless communication device, the other of the analog circuit section, the digital circuit section and the power supply circuit section, which is provided on one surface of the printed board, sandwiches the printed board. The first ground pattern is provided so as to cover almost all of the surface.

Therefore, according to the present invention, the analog circuit section, the digital circuit section, and the power supply circuit section provided on one surface of the printed circuit board cover substantially all of the other surface sandwiching the printed circuit board. By disposing the first ground pattern on the other side, the other surface of the printed circuit board is electromagnetically shielded by the first ground pattern, and noise from the digital circuit unit and the power supply circuit unit is removed from the other side of the printed circuit board. Mixing into the analog circuit via the surface can be reduced.

Therefore, it is possible to prevent the loss of communication data and the deterioration of the error rate caused by the noise from the digital circuit section and the power supply circuit section entering the analog circuit section via the other surface of the printed circuit board. .

The antenna, the analog circuit, the digital circuit, and the power supply circuit, all of which constitute the card-type wireless communication device, are all disposed on one surface of the printed circuit board.

Therefore, by arranging the antenna, the analog circuit section, the digital circuit section, and the circuit of the power supply section which constitute the card type wireless communication apparatus on one surface of the printed circuit board, the card type wireless communication apparatus is provided. The device can be made thinner.

The present invention also provides the card-type wireless communication device, wherein the printed board is a laminated board including a front layer, an intermediate layer, and a back layer. A second ground pattern related to the analog circuit unit is provided between the first and second circuits, and a signal pattern for connecting signals between circuits related to the digital circuit unit is provided on the intermediate layer. Is what you do.

Therefore, according to the present invention, a signal for connecting a signal between the analog circuit provided on one surface of the printed circuit board and each circuit related to the digital circuit provided on the inner layer pattern is provided. By providing the second ground pattern related to the analog circuit section between the analog circuit section and the pattern, an electromagnetic shield is provided between the analog circuit section and a signal pattern for connecting signals between circuits related to the digital circuit section. Digital noise generated from a signal pattern for connecting signals between circuits related to the digital circuit section is
Mixing into the analog circuit can be reduced.

Further, by arranging a signal pattern for connecting signals between the circuits related to the digital circuit section on the inner layer pattern, compared with a case where the signal pattern is arranged on one surface of the printed circuit board, Digital noise generated from a signal pattern for connecting signals between circuits related to the digital circuit unit can be reduced from being mixed into the antenna and the analog circuit unit.

Therefore, the digital noise generated from the signal pattern for connecting the signals between the circuits related to the digital circuit section is mixed into the antenna and the analog circuit section to prevent the loss of the communication data and the deterioration of the error rate. Can be prevented.

Further, according to the present invention, in the above-mentioned card-type wireless communication device, the second ground pattern covers substantially all of a portion overlapping with the analog circuit portion provided on one surface of the printed circuit board. It is characterized by being arranged as follows.

Therefore, according to the present invention, the analog circuit section is provided between the analog circuit section and a signal pattern for connecting signals between circuits related to the digital circuit section provided in the inner layer pattern. By disposing the related second ground pattern so as to cover almost all of the portion overlapping the analog circuit portion, a signal pattern for connecting a signal between circuits related to the analog circuit portion and the digital circuit portion is provided. Electromagnetic shielding is more reliably performed between the circuits, and digital noise generated from a signal pattern for connecting signals between circuits related to the digital circuit unit can be more effectively reduced from being mixed into the analog circuit unit.

Therefore, the loss of communication data and the deterioration of the error rate caused by the digital noise generated from the signal pattern for connecting the signals between the circuits related to the digital circuit section to the antenna and the analog circuit section can be prevented. Can be prevented.

Further, according to the present invention, in the above card-type wireless communication apparatus, in the inner layer pattern provided with a signal pattern for connecting a signal between circuits related to the digital circuit section, one of the printed circuit boards is provided. A third ground pattern relating to the transmission / reception circuit is provided so as to cover substantially all of the portion overlapping the transmission / reception circuit provided on the surface of
Ground for the transmitting / receiving circuit, the first ground pattern,
The second ground pattern and the third ground pattern are connected to each other by a plurality of through-hole holes.

Therefore, according to the present invention, in the inner layer pattern provided with the signal pattern for connecting the signals between the circuits related to the digital circuit section, the third ground pattern related to the transmission / reception circuit is connected to the transmission / reception circuit. Arranged so as to cover almost all of the overlapping portion, and further, the ground of the transmitting / receiving circuit, the first ground pattern, the second ground pattern, and the third ground pattern are connected to a plurality of through-hole holes. The connection between the transmission and reception circuit and the signal pattern for connecting the signal between the circuits related to the digital circuit unit is more reliably electromagnetically shielded, and the signal between the circuits related to the digital circuit unit is connected. Noise generated from the signal pattern for
Mixing into the transmission / reception circuit can be reduced.

Therefore, the digital noise generated from the signal pattern for connecting the signals between the circuits related to the digital circuit section is mixed with the antenna and the analog circuit section to prevent the loss of the communication data and the deterioration of the error rate. Can be prevented.

Further, according to the present invention, in the above card-type radio communication device, the frequency band of the high-frequency signal transmitted and received from the antenna is in the 2.4 GHz band, and a frequency hopping method using a spread spectrum technique is used. It is characterized by having.

Therefore, according to the present invention, it is possible to provide a card-type wireless communication device which has a wireless communication function of preventing loss of communication data and deterioration of an error rate, and is small and thin.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an arrangement of each circuit on a printed circuit board of a card-type wireless communication device according to an embodiment of the present invention, wherein (a) is viewed from one surface of the printed circuit board; It is a top view, (b) is a side view of the printed circuit board, and (c) is a plan view seen from the other surface of the printed circuit board.

FIGS. 2A and 2B are schematic diagrams showing the arrangement of ground patterns between layers of a laminated substrate of a card-type wireless communication device according to an embodiment of the present invention, wherein FIG.
FIG. 3B is a diagram showing the arrangement of the ground pattern, FIG. 3B is a diagram showing the arrangement of a third ground pattern relating to the transmission / reception circuit, and FIG. 3C is a cross-sectional view of the laminated substrate.

FIG. 3 is a block circuit diagram showing a schematic configuration of a card-type wireless communication device according to an embodiment of the present invention.

FIG. 4 is a block circuit diagram illustrating a schematic configuration of a conventional card-type wireless communication device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 card-type wireless communication device 11 antenna 12 power supply circuit unit 13 connector 20 analog circuit unit 21 input / output filter circuit 22 transmission / reception circuit 23 reception amplification circuit 24 transmission amplification circuit 25a, 25b mixer circuit 26 local oscillator 27 demodulation circuit 28 modulation circuit 29th Oscillator 1 Digital circuit unit 31 Input / output baseband signal processing circuit 32 Control circuit 33 Interface circuit 34 Second oscillator 50 Printed circuit board (laminated substrate) 50b First ground pattern 51 Surface layer 52, 53, 54 Intermediate layer 55 Back layer 56, 57, 58, 59 Inner layer pattern 56a Second ground pattern 57a Third ground pattern 60 Through-hole hole

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 5B035 AA11 BB09 BC00 CA01 CA07 CA08 CA23 CA31 5K011 AA04 AA15 AA16 BA04 BA10 DA02 DA05 DA15 DA27 JA12 KA05

Claims (9)

[Claims] 1. An information terminal device, comprising: an antenna;
An analog circuit unit having an input / output filter function and a modulation / demodulation function, a digital circuit unit having an input / output baseband signal processing function of the analog circuit unit, an interface function between the information terminal devices, and a control function of controlling these, and a power supply A card-type wireless communication device in which a circuit unit and a connector for connecting to the information terminal device are disposed on one surface of a substantially rectangular printed circuit board, wherein an edge of one side of the printed circuit board is provided. The connector is provided, the power supply circuit unit is provided in proximity to the connector, the antenna is provided in proximity to a side opposite to the side on which the connector is provided, and the connector is provided. The analog circuit portion is disposed in proximity to one side adjacent to the provided one side, and the digital circuit is disposed in proximity to another side adjacent to the one side in which the connector is disposed. A card-type wireless communication device, wherein a card circuit section is provided. 2. The analog circuit section includes an input / output filter circuit having an input / output filter function and a transmission / reception circuit having a modulation / demodulation function, and the digital circuit section includes an input / output baseband signal processing of the analog circuit section. An input / output baseband signal processing circuit having a function, an interface circuit having an interface function between the information terminal devices, and a control circuit for controlling the input / output baseband signal processing circuit and the interface circuit. The signal path between the connector and the connector is arranged such that the antenna, the input / output filter circuit, the transmission / reception circuit, the input / output baseband signal processing circuit, the interface circuit, and the connector are substantially N-shaped or substantially inverted N-shaped in this order. The card-type wireless communication device according to claim 1, wherein the wireless communication device is provided. 3. A control circuit comprising: a first oscillator related to the transmission / reception circuit, wherein the first oscillator is provided at a corner between one side on which the connector is provided and an adjacent side. 3. The card-type wireless communication device according to claim 2, wherein the first oscillator is disposed at a corner opposite to the one corner where the first oscillator is disposed. 4. A second circuit according to claim 2, wherein
The second oscillator is disposed substantially at the center of the printed circuit board, and the transmitting / receiving circuit and the interface circuit are disposed on both sides of the second oscillator with the second oscillator interposed therebetween. 4. The card-type wireless communication device according to claim 2, wherein the card-type wireless communication device is provided. 5. A first ground so as to cover substantially all of the other surfaces of the analog circuit section, the digital circuit section, and the power supply circuit section, which are provided on one surface of the printed circuit board, across the printed circuit board. The card-type wireless communication device according to any one of claims 1 to 4, wherein a pattern is provided. 6. The printed circuit board is a laminated board including a surface layer, an intermediate layer, and a back layer, and a second ground related to the analog circuit unit between the surface layer and the intermediate layer. The pattern according to claim 1, wherein a signal pattern for connecting a signal between circuits related to the digital circuit unit is provided on the intermediate layer. 7. The card-type wireless communication device according to the above. 7. The printed circuit board according to claim 1, wherein the second ground pattern is provided so as to cover almost all of a portion overlapping the analog circuit portion provided on one surface of the printed circuit board. 7. The card-type wireless communication device according to 6. 8. A portion of an inner layer pattern on which a signal pattern for connecting signals between circuits related to the digital circuit portion is provided, the portion overlapping with the transmitting / receiving circuit provided on one surface of the printed circuit board. A third ground pattern relating to the transmitting / receiving circuit is provided so as to cover substantially all of the ground pattern, and the ground of the transmitting / receiving circuit, the first ground pattern, the second ground pattern, and the third ground pattern are connected to each other. 8. The card-type wireless communication device according to claim 7, wherein the card-type wireless communication device is connected by a plurality of through-holes. 9. The card-type wireless communication device, wherein a frequency band of a high-frequency signal transmitted and received from the antenna is 2.4.
The card-type wireless communication device according to any one of claims 1 to 8, wherein the wireless communication device is in a GHz band and uses a frequency hopping method using a spread spectrum technique.