JP3997517B2 - Diversity antenna device, card type module using the same, and communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a card-type module used when inserted into an information terminal device such as a notebook personal computer to perform data communication over a wireless line, and a diversity antenna device equipped in a communication device such as the card-type module or a mobile phone. Is.
[0002]
[Prior art]
Recently, along with the rapid spread of portable information terminal devices such as notebook computers and mobile phones, there are an increasing number of examples in which data communication is performed on a wireless line using these portable terminals. For example, data communication by wireless LAN using the GHz band is used by connecting a wireless information terminal equipped with an antenna device to a portable information terminal device incorporating an antenna device in advance or a notebook personal computer. Of these, in the latter case, a card-type wireless information medium (card-type module) having an antenna device is generally connected by being inserted into a slot connection portion of a notebook computer or the like.
[0003]
In recent years, the size and shape of notebook personal computers have been diversified. For this reason, it is desirable that the antenna device of the card type module connected to the notebook personal computer maintains the antenna characteristics and reliably performs the data communication without being influenced by these various notebook personal computer models. ing.
In addition, since a notebook personal computer or the like is usually used in various states, the relative position between the radio base station (repeater) and the terminal is unspecified. Therefore, stable communication is performed even under such conditions. Therefore, it is desirable that the directivity is distributed in all directions of the terminal-side antenna. Furthermore, it is desirable for the antennas of the terminal and the base station to have the same plane of electric field radiation. On the other hand, the planes of polarization of the antennas are orthogonal to each other so that only one polarization can be transmitted and received in a certain direction. The antenna characteristics interfere with data communication.
However, it is theoretically impossible to achieve omnidirectional directivity with a single monopole or dipole antenna. To solve this problem, two or more antennas with different directivities or polarization planes are combined. A diversity antenna apparatus using a received signal of an antenna in which the reception state is good has been put into practical use.
[0004]
Conventionally, as described in the Antenna Engineering Handbook (Ohm Corp., page 586), diversity antennas used in personal digital assistants, etc., two or more antennas are spatially separated and received from multiple antennas. A space diversity antenna that selects a highly sensitive antenna is common. For example, Japanese Patent Laid-Open No. 9-326626 discloses a diversity antenna for a wireless card in which F-type conductive pattern antennas are provided at both corners of a printed circuit board so as to prevent a fading phenomenon in which the intensity of radio waves varies depending on the position. Is disclosed.
Further, as an example of a polarization diversity type antenna using two or more antennas having different polarization planes and using an antenna having a good reception state, there is, for example, Japanese Patent Laid-Open No. 2002-16434. In this example, a case where a chip-sized small antenna (hereinafter abbreviated as a chip antenna) and a whip antenna are used is disclosed. Here, with respect to the problem that it is difficult to obtain the diversity effect due to the mutual interference of the radiation directivities which are similar to each other, means for improving the problem by defining the mounting position of the chip antenna on the circuit board has been proposed.
[0005]
[Problems to be solved by the invention]
By the way, as a diversity antenna used in a small wireless terminal such as a mobile phone or a card-type module, a chip antenna that is smaller and lighter than a whip antenna and is easily mounted on a circuit board inside the terminal is often used. It has become to. Furthermore, as this chip antenna, a patch antenna having circular polarization characteristics regardless of the direction of polarization plane or a plurality of antennas satisfying the polarization characteristics of vertical polarization and horizontal polarization are used. It is preferable. However, the size of the card-type module is generally limited, and it is necessary to have a small size together with the circuit board and the antenna. In this respect, the former patch antenna is large even in the GHz band and cannot be built in the card. In this regard, the latter requires at least two antennas, but can be reduced in size. However, from the viewpoint of component management and manufacturing, one type of antenna is desirable and it is not preferable to use a different type of antenna. In addition, the characteristics of a directional diversity antenna that can actively receive radio waves from a specific direction are also required. In view of the above, particularly for card type modules, there is a demand for an antenna device that combines the performance of space, polarization, and directional diversity with a simpler configuration.
[0006]
The present invention relates to a spatial diversity antenna in which surface-mounted antennas of the same type having both vertical and horizontal polarization characteristics are arranged spatially apart on a circuit board, and further, directional diversity is provided. An object of the present invention is to provide an antenna device with improved performance and a card-type module or communication device using the antenna device.
[0007]
[Means for Solving the Problems]
In the present invention, two chip antennas arranged to be excited at λ / 2 or λ / 4 with respect to a wavelength (λ) of a transmission / reception frequency are arranged opposite to each other. At this time, a circuit board is synchronized with the excitation. The present inventors have found that the directions of the resonance currents flowing through are substantially orthogonal and emphasize the directivity in the horizontal direction, and have arrived at the present invention.
That is, according to the present invention, a first antenna and a second antenna are arranged on a circuit board via a space, and either or both of the first antenna and the second antenna are selectively used as a transmission / reception circuit. A diversity antenna apparatus for connecting and transmitting and receiving, wherein the first antenna and the second antenna have a radiation electrode excited at λ / 2 or λ / 4 with respect to a wavelength (λ) of a transmission and reception frequency, and a ground A surface-mounted chip antenna having an electrode and a feeding electrode on a substrate surface, wherein the first chip antenna and the second chip antenna are connected to corners of a circuit board. The ratio (La / Ls) of the length (La) in the longitudinal direction of the chip antenna to the length (Ls) of the circuit board in the direction in which the first chip antenna and the second chip antenna face each other. 1/10 to 2/5, and the length h from the short side of the circuit board is about 1/10 of Ls A diversity antenna device that is arranged oppositely and in which a diagonal resonance current excited on the circuit board from the first chip antenna and a diagonal resonance current excited on the circuit board from the second chip antenna are substantially orthogonal to each other. The card-type module comprising: the first chip antenna and the second chip antenna are arranged so that the longitudinal directions thereof are orthogonal to the longitudinal direction of the module, and the card-type module is inserted into the information terminal device And the diversity antenna device part is formed in a portion protruding to the outside from the information terminal device. It is.
[0008]
Diversity antenna device of the present invention Card type module equipped with The first chip antenna and the second chip antenna are formed as chip antennas having symmetrical electrodes, and the ground electrode of the first chip antenna is disposed so as to face one side in the longitudinal direction of the circuit board. The ground electrode of the second chip antenna is arranged so as to face the other side facing the one side of the circuit board, and the direction of the resonance current excited on the circuit board by each chip antenna is symmetrical They are approximately orthogonal. It has been found that the resonance current is in a current mode, and the resonance current flowing on the circuit board side at this time flows on a diagonal line from the vicinity of the ground electrode. Therefore, a point-symmetrical arrangement (mirror arrangement) with the ground electrode side facing outwards is better because it shows more symmetric horizontal directivity.
[0009]
Diversity antenna device of the present invention Card type module equipped with The first chip antenna and the second chip antenna are formed as chip antennas having the same electrode, and each chip antenna is arranged so that the ground electrode faces one side of the circuit board. The direction of the resonance current excited on the circuit board by the antenna is asymmetrical and substantially orthogonal. The directivity is slightly asymmetric because the position of the ground electrode is shifted left and right or up and down. However, since the occupation ratio of the chip antenna with respect to the substrate is extremely small, it is effective in the case of a specification that allows asymmetry, and the merit of using the same chip antenna is high here.
[0010]
Diversity antenna device of the present invention Card type module equipped with Is the ratio (La / Ls) of the length (La) in the longitudinal direction of the chip antenna to the length (Ls) of the circuit board in the direction in which the first chip antenna and the second chip antenna face each other. 10 to 2/5. Moreover, it is desirable to provide in the position about 0.5-1 mm below from the short side.
Moreover, the diversity antenna apparatus of the present invention Card type module equipped with One of the first chip antenna and the second chip antenna can be arranged on a ground conductor provided on the circuit board, and the other can be arranged in a region where no ground conductor is provided. . In this case, an improvement in vertical polarization characteristics can be expected by the chip antenna disposed on the ground conductor. On the other hand, the chip antenna placed on the ungrounded conductor can be expected to improve the radiation efficiency and widen the propagation frequency.
[0011]
The present invention is a card-type module comprising any of the above-described diversity antenna devices, wherein the longitudinal directions of the first chip antenna and the second chip antenna are orthogonal to the longitudinal direction of the module. When the card type module is inserted into the information terminal device and used, the diversity antenna device part is formed at a portion protruding to the outside from the information terminal device. It is.
Moreover, this invention is a communication apparatus equipped with the diversity antenna apparatus in any one of said.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a schematic diagram of a diversity antenna apparatus of the present invention. First, in the present invention, the structure of the surface-mounted chip antenna is not specified, but at least the wavelength (λ) of the transmission / reception frequency is excited at λ / 2 or λ / 4. It is desirable to use a printed pattern of electrode patterns having the functions of the power feeding electrode. For example, in the antenna shown in FIG. 3 to be described later, a substantially L-shaped or J-shaped radiation electrode 11 is formed on the upper surface of the antenna base 10, a radiation electrode 12 is formed on the adjacent back side surface, and a ground electrode 13 is formed on the lower surface. The feeding electrode 14 is provided on the front side. With this electrode configuration, both vertical and horizontal polarization characteristics can be exhibited. Further, only the antenna base is shown on the circuit board 3 shown in the figure, and other lines and components are omitted. Here, the ground conductor 30 is provided on the substrate surface, the chip antenna is mounted on the ground conductor, and the ground is taken through the ground electrode 13 on the back surface of the substrate.
[0013]
In FIG. 1, the first antenna 1A and the second antenna 1B have a configuration of a space diversity antenna that is disposed so as to face each other through a space. Here, it can be said that the first antenna 1A and the second antenna 1B are formed by symmetrically forming individual electrode patterns on the same base and have the same electrode structure. This can be easily manufactured by changing only the pattern printing process. As for the arrangement on the substrate, the ground electrode 13 side is arranged in parallel with the short side 3U in the upper right corner toward the one side 3R side of the circuit board, and the second antenna 1B is arranged on the ground electrode 13 side in the upper left corner. Are arranged in parallel with the short side 3U toward the other side 3L facing the one side 3R. That is, the antennas 1A and 1B having the same electrode structure are arranged opposite to each other in a point-symmetric manner so that the respective grounding sides are directed to the side. At this time, the currents flowing through the first and second antennas flow in a loop around the respective antenna bases and radiate in the horizontal and vertical directions. In addition, current also flows through a diagonal line indicated by a solid line 36 with the ground electrode vicinity as a base point, while current also flows from the second antenna 1B to a diagonal line indicated by a broken line 35 with the ground electrode vicinity as a base point on the substrate conductor, Both currents are symmetrically substantially orthogonal.
[0014]
When these currents are about a quarter wavelength (λ / 4) or a half wavelength (λ / 2) of the radio wave radiated from the substrate diagonal, the current mode is in a resonant state. Therefore, radio waves from the substrate are easily radiated, and the antenna gain is maximized. The antenna directivity is distributed substantially concentrically with respect to the direction of the resonance current on the substrate diagonal, and as shown in FIG. 1, only radiation having a null point on the diagonal and directivity of the horizontal polarization component is obtained. Can be extracted from the antenna and the entire substrate. Therefore, the radiation of the directivity pattern indicated by the solid line 46 and the radiation of the directivity pattern indicated by the broken line 45 are added to complement each other and become non-directional radiation, which exhibits particularly good characteristics as a directional diversity antenna in the horizontal direction. It becomes.
The length La of the first and second chip antennas in the longitudinal direction is about 1/3 of the length Ls of the short side 3U of the circuit board, which is sufficiently small with respect to the board, and the dimension h from the short side 3U. Is about 1/10, which is slightly smaller than the longitudinal dimension of the substrate. Although the chip antenna is small with respect to the substrate as described above, the resonance current generated on the diagonal line of the substrate is used, so that the directivity in the horizontal direction is emphasized and the size can be reduced.
[0015]
FIG. 2 shows another arrangement example of the first chip antenna and the second chip antenna. In this example, both chip antennas are the same type of antenna having the same electrode structure, and are arranged so that the ground electrode 13 faces the longitudinal side surface 3R side of the substrate. The dimensions are the same as above. In this case, the position of the ground electrode is asymmetric with respect to the substrate, but the resonance current on the diagonal line is generated so as to be substantially orthogonal as shown by the solid line 37 and the broken line 38. Although not shown, a radiation pattern having the directivity of the horizontal polarization component is added. This is because the directivity pattern slightly collapses compared to the case of the mirror target in the above example, but it becomes non-directional radiation as a diversity antenna within an allowable range, and particularly shows good characteristics as a horizontal directivity diversity antenna. Become. In this case, since the same antenna is used, it is easy to manage and can be manufactured easily and inexpensively.
[0016]
Next, an example of a surface-mounted chip antenna is shown in FIGS. The antenna shown in FIG. 3 is an antenna suitable for mounting on a ground conductor of a circuit board, and is made of a dielectric such as low-temperature sintered ceramics, and has a dielectric constant of about 8-30. The substrate size is about 8 to 12 mm long × 2 to 4 mm wide × 1 to 3 mm high, and is formed on the upper surface of the rectangular parallelepiped substrate 10 so as to be excited at λ / 4 with respect to the wavelength (λ) of the transmission and reception frequency. A radiating electrode 11 formed in an L shape or a J shape and having one end as an open end, and a radiating electrode 12 connected to the other end of the radiating electrode 11 are provided on the back side, and a ground electrode 13 is continuously provided on the lower surface. The feeding electrode 14 is formed by a printing pattern on the front side surface in front. In addition, the other electrode 15 and the electrode extended to the side surface are used for solder fixing at the time of surface mounting. Therefore, this can be an LGA (Land Grid Array) or a BGA (Ball Grid Array), which is not essential. Capacitive coupling is provided between the feeding electrode 14 and the open end of the radiation electrode 11 to facilitate impedance matching. The corner of the radiation electrode 11 is rounded to increase the radiation gain. Further, the ground electrode 13 is placed on the ground conductor and reliably takes the ground. These electrodes constitute a resonance circuit, and when a signal is input to the resonance circuit from a high-frequency power source (not shown) via the feeding electrode 14, the radiation electrode is excited in the resonance circuit, and as a result, a part of the energy Is radiated into the air and functions as an antenna. In addition, since a resonance current flows in a direction perpendicular to the substrate via capacitive coupling between the radiation electrode 11 and the substrate ground (ground conductor), uniform directivity (nondirectionality) in the horizontal direction with respect to the substrate ground surface. Is obtained. This is vertically polarized with respect to the substrate surface, and forms polarization diversity in combination with the horizontally polarized wave component generated by the resonance current flowing through the substrate diagonal shown in FIG.
[0017]
The antenna shown in FIG. 4 is an antenna suitable for mounting in a region without a ground conductor (non-ground conductor region) even on the circuit board. Further, the radiation electrode 22 that is connected to the other end of the radiation electrode 21 on the back side surface and extends in the longitudinal direction, the ground electrode 23 that continues to the lower surface, and the power supply electrode 24 that is provided on the front side surface are each formed by a printing pattern. . The function of the resonance circuit is the same as that of FIG. 3, but when the antenna is mounted in a region without a ground conductor, it can be non-directional, but the occupied area can be taken, so the antenna base must be further downsized. There is. This can be solved by using a material having a high dielectric constant, but the bandwidth is conversely reduced. Therefore, here, the radiation electrode 22 is formed in a stripe shape extending in the longitudinal direction to increase the inductance component to compensate for a decrease in bandwidth. Since the antenna shown in FIG. 4 is far away from the radiation electrode 21 and the substrate ground (ground conductor) compared to the antenna shown in FIG. 3, their coupling capacitance is small, so that the resonance current perpendicular to the substrate is small. For this reason, although there are few vertical polarization components with respect to a board | substrate surface, on the other hand, in addition to being able to radiate | transmit an electromagnetic wave efficiently from an antenna, there exists an advantage which can aim at the broadband of a propagation frequency.
[0018]
5 and 6 show another example of the diversity antenna device, in which the arrangement of the chip antenna is changed. That is, one (FIG. 5) or both (FIG. 6) of the first chip antenna and the second chip antenna are arranged so that the longitudinal direction of the substrate is parallel to the longitudinal direction of the substrate. In the example of FIGS. 1 and 2, since the antenna occupies a substantially small area at the corner of the substrate, it is desirable to use it in a card type module or the like. However, circuit boards such as communication devices may be orthogonal or parallel in circuit design. Even in the example of the chip antenna arranged in parallel with the longitudinal direction as shown in FIG. 5 and FIG. 6, it is confirmed that the resonance current is generated on the diagonal line and these are substantially orthogonal. In these examples, there is a possibility that the pattern objectivity and directionality of horizontal polarization may be lost, but the utility value is sufficient.
[0019]
Next, FIG. 7 is a schematic view showing an example of a card-type module. The inside of the module main body 50 is not shown, and the antenna device portion is also shown with the resin case and the like removed. The module main body 50 is inserted into the slot portion of a notebook computer or the like in the direction of the arrow so that the antenna device portion on which the antenna is mounted is positioned outside the slot. Therefore, it is possible to efficiently radiate radio waves anywhere in the horizontal and vertical directions around the wireless device. In addition, by providing the antenna outside the housing, it is possible to prevent a part of the electromagnetic waves radiated from the antenna from leaking into the housing, so that there is an advantage that noise can be reduced and reception performance can be improved. FIG. 7 shows an embodiment in which the antenna of FIG. 4 is mounted, and elements other than the antenna device are not shown. The antenna device has regions 31 without the ground conductors 30 at the left and right corners of the circuit board 3, and the antenna electrode 2A of the antenna 2A is arranged in this portion so that the side of the circuit board 3 faces the one side 3R side. The 2A ′ ground electrode 23 side is disposed so as to face the side 3L. The ground electrode 23 is placed on the transfer portion 32 of the ground conductor 30 to take the ground, and the power supply electrode 24 is connected to the power source side by the strip line 33.
This example shows a case where an antenna is mounted in a region (non-grounded conductor) where there is no grounded conductor in the embodiment shown in FIG. In this example, the radiation efficiency and the bandwidth are improved and the resonance current flows on the circuit board 3 so as to be substantially orthogonal to the diagonal line. As a result, a directional diversity antenna having a directivity in the horizontal direction is obtained. I can do it.
[0020]
FIG. 8 shows another card-type module embodiment. In this example, the antenna device 1A shown in FIG. 3 is mounted on a ground conductor 30, and the antenna 2A ′ shown in FIG. 4 is mounted on a region (non-ground conductor) 31 having no ground conductor. Since the ground electrode 13 of the antenna 1A faces the one side 3R side of the circuit board 3, and the ground electrode 23 of the antenna 2A 'is arranged toward the other side 3L side of the circuit board, they are arranged opposite to each other in a point symmetrical manner. It is an example. Since the current mode and directivity are the same as in the above embodiment, the description thereof is omitted. When the antenna is mounted directly on the ground conductor, the vertical polarization characteristics are likely to be improved. In consideration of the balance between vertical and horizontal polarization characteristics, antenna characteristics such as radiation gain, bandwidth, and circuit board design, when placed on a ground conductor, in an area without a ground conductor, or Since it may be a combination of both, it is preferable to select appropriately.
[0021]
Next, the following tests were conducted.
A structural model in which the antenna (dimension 10 × 3 × 2 mm) shown in FIG. 3 is mounted on a printed circuit board (length 40 mm, short side 30 mm, thickness 1 mm) as shown in FIG. The antenna operation principle of the card type module was verified by obtaining the electric and magnetic fields by simulation. FIGS. 9A and 9B are simulation results of current density for the above model, where FIG. 9A shows the power supply to the chip antenna 1A ′, FIG. 9B shows the power supply to the chip antenna 1A, The higher the current density, the darker the color. However, since the actual simulation results are difficult to understand, the layers are replicated. From the simulation results of FIG. 9, it can be seen that when power is supplied to the chip antennas 1A and 1B, the current density layer extends in a circular arc on a diagonal line. It was found that the current direction at this time was in the normal direction as indicated by an arrow in a part of the interlayer, and therefore the resonance current flowed on the diagonal of the substrate. Although (a) and (b) are not objects at all, they are almost symmetrical (referred to as asymmetric in the present invention), and it has been confirmed that the resonance currents of both are substantially orthogonal to each other. The simulation result in the case of FIG. 1 has a higher target property than this, so that FIG. 9B appears almost symmetrically (which is not necessarily a target but is a target in the present invention). )was gotten. In this way, the flow direction and status of the resonance current can be confirmed by electromagnetic field simulation.
[0022]
Further, FIG. 10 shows the result of obtaining the directivity in the horizontal direction with respect to the substrate surface based on the calculated values of the electric field and the magnetic field under the above simulation conditions. FIG. 10A shows the case where power is supplied to the chip antenna 1A ′, and FIG. 10B shows the case where power is supplied to the chip antenna 1A. The circumference is the horizontal plane of the card type module substrate, and 0 ° indicates the longitudinal (antenna mounting) direction of the substrate. Concentric circles indicate the absolute gain of the antenna. From the figure, when supplying power to the chip antenna 1A ′, there is a null point in the direction of the resonance current shown in FIG. 9A, and when supplying power to the chip antenna 1A, the direction of the resonance current shown in FIG. 9B. Has a null point. It can be seen that directivity (maximum gain) can be obtained in the diagonal direction of the substrate that is substantially orthogonal to these. When power is supplied to both of the chip antennas 1A ′ and 1A, the directivity in the horizontal direction is enhanced, and these results confirm the directivity diversity effect intended by the present invention.
[0023]
【The invention's effect】
As described above, in the antenna device of the present invention, the first chip antenna and the second chip antenna are disposed opposite to the corners of the circuit board, and the resonance current that substantially intersects the diagonal line is generated. With the addition of directional radiation, the antenna device has the characteristics of a spatial diversity antenna and has improved the performance of directional diversity especially in the horizontal direction. Since these chip antennas occupy a small area with respect to the circuit board, the entire antenna device can be miniaturized, and the same kind of chip antenna can be used, so that there are advantages in manufacturing and management.
In addition, when a card-type module incorporating these antenna devices is inserted into the slot portion of the information terminal device and used, the antenna device portion is formed at a portion protruding outward from the information terminal device. A highly efficient diversity effect can be obtained without impairing the performance of the directional diversity.
In addition, even when the antenna device described above is built in a communication device, a communication device having high directivity diversity performance in the horizontal direction can be obtained.
[Brief description of the drawings]
FIG. 1 is a top view of an antenna device for explaining an embodiment of the present invention.
FIG. 2 is a top view of an antenna device for explaining another embodiment of the present invention.
FIG. 3 is a perspective view showing an example of a surface-mounted chip antenna used in the antenna device of the present invention.
FIG. 4 is a perspective view showing another example of a surface-mounted chip antenna used in the antenna device of the present invention.
FIG. 5 is a top view showing another embodiment of the antenna device of the present invention.
FIG. 6 is a top view showing still another embodiment of the antenna device of the present invention.
FIG. 7 is a perspective view showing an embodiment of the card-type module of the present invention.
FIG. 8 is a perspective view showing another embodiment of the card type module of the present invention.
FIG. 9 is a schematic diagram showing a simulation result of current density according to the present invention.
FIG. 10 is a diagram showing a directivity simulation result of the present invention.
[Explanation of symbols]
1A, 1A ′, 1B, 2A, 2A ′: surface mount type chip antenna
3: Circuit board
4: Antenna device
5: Card type module
10, 20: Antenna base
11, 12, 21, 22: radiation electrode
13, 23: Ground electrode
14, 24: Feed electrode
15, 25: Dummy electrodes for solder connection
3R, 3L: One side of the circuit board
30: Ground conductor
31: Area without ground conductor
35: Current direction of the second antenna
36: Current direction of the first antenna
45: Directional pattern of the second antenna
46: Directivity pattern of the first antenna

Claims (4)

A first antenna and a second antenna are arranged on a circuit board through a space, and either or both of the first antenna and the second antenna are selectively connected to a transmission / reception circuit for transmission / reception. A diversity antenna device, wherein the first antenna and the second antenna are a radiation electrode excited at λ / 2 or λ / 4 with respect to a wavelength (λ) of a transmission / reception frequency, a ground electrode, a feeding electrode, On the surface of the substrate, the first chip antenna and the second chip antenna being corner portions of the circuit board , wherein the first chip antenna and the second chip antenna are The ratio (La / Ls) of the length (La) of the chip antenna in the longitudinal direction to the length (Ls) of the circuit board in the opposite direction is 1/10 to 2/5, and from the short side of the circuit board The length h of faces arranged to be about 1/10 of s, the first diagonal direction of the resonant current to be excited on the circuit board from the chip antenna and the diagonal direction to be excited on the circuit board from the second chip antenna A card-type module having a diversity antenna device in which a resonance current is substantially orthogonal to each other, wherein the longitudinal directions of the first chip antenna and the second chip antenna are orthogonal to the longitudinal direction of the module; The card-type module, wherein when the card-type module is inserted into an information terminal device and used, the diversity antenna device is formed at a portion protruding outward from the information terminal device . The first chip antenna and the second chip antenna are formed as chip antennas having symmetrical electrodes, and the ground electrode of the first chip antenna is arranged so as to face one side in the longitudinal direction of the circuit board, The ground electrode of the second chip antenna is arranged so as to face the other side opposite to one side of the circuit board, and the direction of the resonance current excited on the circuit board by each chip antenna is made substantially orthogonal. The card-type module according to claim 1. The first chip antenna and the second chip antenna are formed as chip antennas having the same electrode, and the respective ground electrodes are arranged so as to face one side of the circuit board. 2. The card type module according to claim 1, wherein directions of resonance currents to be excited are asymmetrically substantially orthogonal. One of the first chip antenna and the second chip antenna is disposed on a ground conductor provided on the circuit board, and the other is disposed in a region where no ground conductor is provided. The card-type module according to claim 1.

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