JP2005027134A - Antenna and radio equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna which gives an excellent radio environment, compensates the loss in a feeder line and suppresses the influence of the current leaking from the antenna, and to provide radio equipment using the same. <P>SOLUTION: An antenna 4 is connected with a line 1 (3a) at a feeding point and receives power. The output of an amplifier 2 is connected with a line 2 (3b), further connected with a coaxial cable 6 via a connector 5, and still further connected with a radio part 20 located at a remote place. A high frequency signal (RF) is received with the radio part 20 and the power supply bias of the amplifier 2 is supplied. The power supply bias is transmitted through the coaxial cable 6, the connector 5 and the line 2 (3b), an LPF 8 selects only a dc component and power is supplied from a bias circuit 7 to the amplifier 2. At this time, the amplifier 2 is arranged in the vicinity of the center of a printed circuit board 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to an antenna device built in a wireless device such as a portable information terminal or an access point having a wireless communication function such as a wireless LAN (Local Area Network) and a wireless device using the antenna device.
[0002]
[Prior art]
Loss of the feed line connecting the radio unit and the antenna in an apparatus in which an information processing apparatus such as a personal computer and a radio apparatus such as a mobile phone, PHS (Personal Handyphone System), or wireless LAN are integrated, or a radio apparatus such as an access point Becomes more difficult to ignore at higher frequencies. In order to minimize the loss of such a feed line, a proposal has been made in which a parallel flat plate antenna with a low profile is arranged adjacent to a keyboard of a notebook personal computer (see, for example, Patent Document 1). By incorporating the pointer operation unit on both sides of the pointer operation unit, the length of the feed line from the radio unit built in the notebook personal computer to the antenna can be shortened, and loss of the feed line can be reduced.
[0003]
However, in the above configuration, when a character is typed with the keyboard, a hand is placed on the parallel plate antenna, and communication becomes difficult in such a situation. In addition, changes in the antenna input impedance and radiation pattern due to the proximity of a human body such as a hand and a ground plane such as a desk cannot be ignored.
[0004]
On the other hand, it is desirable to arrange the antenna at a position as high as possible in order to obtain a good radio wave environment. In particular, in a situation where a notebook personal computer is used, the display unit is in an open state, so that a favorable radio wave environment can be obtained by providing the display unit above the display unit (see, for example, Patent Document 2).
[0005]
However, the above configuration does not solve the problem of loss of the feed line connecting the radio unit and the antenna.
Therefore, although it is conceivable to increase the gain by an amplifier in the radio unit, a weak received signal is transmitted through a power supply line with a large loss, so that the gain of the amplifier is reduced when it falls below the dynamic range of the radio unit receiver. Even if it is raised, the signal cannot be extracted. Therefore, a method of arranging an amplifier adjacent to the antenna and compensating for the loss of the feed line is also conceivable.
[0006]
However, if an amplifier is arranged adjacent to the antenna, there is a problem that leakage current from the antenna is generated and the operation of the radio unit becomes unstable.
[Patent Document 1]
JP 2002-207535 A (paragraph number 0013 FIG. 1)
[Patent Document 2]
JP 2000-284854 A (paragraph number 0017 FIG. 1)
[0007]
[Problems to be solved by the invention]
As mentioned above, it is desirable to place the antenna as high as possible in order to obtain a good radio wave environment for the antenna that is integrated with the portable radio and further built in. However, the feed line that connects the radio unit and the antenna However, there is a problem that the loss of the feeder line becomes large.
[0008]
Therefore, when an amplifier is configured adjacent to the antenna in order to compensate for the loss of the feed line, there is a problem that leakage current from the antenna is generated and the operation of the amplifier becomes unstable.
The present invention relates to a device in which an information processing device such as a personal computer and a wireless device are integrated, or a wireless device such as an access point, and can obtain a radio wave environment having a good antenna and compensate for a loss of a feed line. And it aims at providing the antenna apparatus which can suppress the influence of the leakage current from an antenna, and a radio | wireless machine using the same.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problem, the present invention provides an antenna, a line connected to the antenna at a feeding point, and an amplifier that amplifies a high-frequency signal input from the line, on a dielectric substrate, The antenna is disposed on the outer edge of the dielectric substrate, and the amplifier is disposed on the inner side of the outer edge of the dielectric substrate and near the center on the axis of symmetry of the dielectric substrate passing through the feeding point. Features.
[0010]
An antenna; a first line connected to the antenna at a feeding point; an amplifier for amplifying a high-frequency signal input from the first line; and a second line connected to an output terminal of the amplifier. And an antenna portion on which a connector connected to the second line is disposed on a dielectric substrate, a coaxial cable connected to the connector and one end thereof, and a radio portion connected to the other end of the coaxial cable And the antenna is disposed at an outer edge portion of the dielectric substrate, and the amplifier is located inside the outer edge portion of the dielectric substrate and near the center on the symmetry axis of the dielectric substrate that passes through the feeding point. It is characterized by being arranged in.
[0011]
This makes it possible to place the antenna as high as possible in order to obtain a good radio wave environment, and even if the coaxial line connecting the radio unit and the antenna becomes long and the loss of the coaxial line increases, an amplifier such as an LNA This makes it possible to compensate for the loss. Further, when the antenna and the amplifier are configured on the same substrate, a leakage current from the antenna is generated. However, since the amplifier can be arranged at a position avoiding this current, the problem can be minimized.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
First, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram illustrating a schematic configuration of an antenna device 10 of the present embodiment and a wireless device using the antenna device 10. An amplifier 2 such as an LNA (low noise amplifier) is disposed in the vicinity of the center on the axis of symmetry AA ′ through a feeding point of a printed circuit board (for example, a dielectric substrate). The input terminal of the amplifier 2 is connected to the line 1 (3a). The antenna 4 is arranged on the outer edge of the printed circuit board 1 and is fed by a monopole antenna, a helical antenna, an inverted F antenna, a meander antenna, a slot antenna, a patch antenna, etc., and fed by a line 1 (3a) such as a microstrip line or a coplanar line. Is done.
[0013]
Here, a case where a monopole antenna is used as the antenna 4 and a microstrip line is used as the line 1 (3a) will be described. The shape and form of the antenna 4 and the line 1 are not particularly limited. The output terminal of the amplifier 2 is connected to the line 2 (3b). The line 2 (3b) is connected to the coaxial line 6 via the connector 5, is connected to the radio unit 20 at a remote position, receives the received high frequency signal (RF) by the radio unit 20, and receives the power supply bias of the amplifier 2 Supply. The power supply bias is transmitted through the coaxial line 6, the connector 5, and the line 2 (3 b), and only the direct current is selected from the bias circuit 7 by the LPF (low-pass filter) 8 to supply power to the amplifier 2. Here, the amplifier 2 has been described in the case where a matching circuit and an HPF (high pass filter) (not shown) are built in. However, if the amplifier 2 is not built in, the matching circuit and the HPF are externally attached on the lines 1 and 2. It ’s fine.
[0014]
FIG. 2 is a diagram in which the antenna device is configured in a notebook computer. In order to enlarge the screen on the liquid crystal 15 side as much as possible, in the notebook computer 200, the wireless unit 13 is built in the main body 14 side having a keyboard. In addition, the wireless unit 13 is inexpensive and it is desirable to use a module that is already modularized in consideration of cost reduction and yield. Here, the radio unit 13 is connected to the antenna devices 11a and 11b via the coaxial cables 12a and 12b. The antenna device uses a transmission antenna 11a and a reception-only antenna 11b equipped with an amplifier, or an antenna 11a capable of transmission and reception and a reception-only antenna 11b equipped with an amplifier in order to perform diversity reception. The antenna portion is covered and built in a non-metallic housing (not shown).
[0015]
FIG. 3 shows a simulation model of the antenna device according to the embodiment of the present invention. The flat plate is approximated by a wire grid. A monopole antenna having a length of 0.25λ and a ground conductor were formed in the same plane within 0.42λ × 0.5λ (λ is a wavelength of a frequency to be used). ○ is the feeding point of the antenna.
[0016]
Next, simulation results are shown in FIGS. In FIG. 4 and FIG. 5, the current distribution on the thick line is divided vertically and horizontally. The horizontal axis of the graph indicates the location. For example, in the case of AB, it means the current flowing between AB. The vertical axis of the graph indicates the amplitude of the current, and the value is normalized by the maximum value of the thick lines 1 and 7. In FIG. 4, 1, 7 and 2, 6 indicate large values. In FIG. 5, since A is directly under the antenna, naturally a large value is shown, but it is not shown here because the level difference is large. In addition to A, B, C, and F show large values. As described above, since the leakage current from the antenna increases around the substrate, it can be seen that it is sufficient to avoid this and arrange the amplifier.
[0017]
FIG. 6 (a) schematically shows the current on the substrate and the antenna in order to explain this. A small antenna generally uses a method of miniaturizing an antenna using an image (also called a mirror image) of a ground conductor. In the case of FIG. 6A, since it is a monopole antenna using an image, a current is generated on the antenna, and a similar current leaks to the substrate. In particular, a large amount of leakage current is generated on A (A14, A74) of the substrate, and most of the current is transmitted on portions 1 (1AF), 7 (7AF), and F (F14, F74) at the end (outer edge) of the substrate. Here, since this model is axially symmetric with respect to the symmetry axis AA ′, the value is small on F because the leakage currents of the same amplitude and opposite phase cancel each other. If it is not axisymmetric, a large amount of leakage current occurs.
[0018]
FIG. 6B shows a specific arrangement position of the amplifier (LNA). 4 and 5, since the leakage current from the antenna is large in the region B, it is desirable to dispose the region B at the position of the region Y in the central portion on the printed circuit board that is away from the antenna and away from the end (outer edge) of the substrate. . That is, in the embodiment described above, since the antenna device is axisymmetric about the axis of symmetry AA ′ (axis 4 in FIG. 6B), the amplifier is located on the inner side from the end (outer edge) of the printed circuit board. And it arrange | positions in the center part on central axis AA '.
[0019]
As described above, since the radio apparatus according to the present embodiment uses a coaxial line, the antenna can be arranged as high as possible in order to obtain a good radio wave environment, and the coaxial line connecting the radio unit and the antenna becomes long. Even if the loss of the coaxial line increases, the loss can be compensated by an amplifier such as an LNA. Further, when the antenna and the amplifier are configured on the same substrate, a leakage current from the antenna is generated. However, since the amplifier can be arranged at a position avoiding this current, the problem can be minimized.
[0020]
(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a diagram illustrating a schematic configuration of the antenna device 70 of the present embodiment and a wireless device using the same.
In the antenna device 70, an inverted F antenna 74 and an amplifier (for example, LNA) 72 are configured on the same substrate as the dielectric substrate 71. The inverted F antenna 74 is connected to an L-shaped element (not shown) patterned on the back surface of the substrate through a through hole 79. This L-shaped element is connected to the ground conductor at a short-circuit point. Then, a power supply bias is supplied via the coaxial cable 76, and a received high frequency signal (RF) is transmitted to the radio unit 20.
[0021]
A method for transmitting a high-frequency signal will be described. A high-frequency signal received from an antenna element 74 that is an inverted F antenna enters an amplifier (for example, LNA) 72 via an MSL (microstrip line) 73a. The high frequency signal is amplified by the amplifier 72 and is incident on the radio unit 20 via the MSL 73 b, the connector 75, and the coaxial cable 76.
[0022]
Next, a method for supplying the power supply bias of the amplifier 72 will be described. A coaxial cable 76, a connector 75, and an LPF (low pass filter) 78 are transmitted, and power is supplied to the amplifier 72 via a bias circuit 77. Here, the case where the amplifier 72 includes a matching circuit and an HPF (high-pass filter) (not shown) has been described. However, when the amplifier 72 is not included, the amplifier 72 can be applied externally to the MSLs 73a and 73b.
[0023]
FIG. 8A is a three-dimensional view showing a detailed configuration of the inverted F antenna.
The printed circuit board 80 is composed of a double-sided board having a surface 1 and a surface 2, and a dielectric substrate such as a BT resin or a glass epoxy substrate is used. Copper, gold, or the like is used for elements, lines, and ground conductors that are configured on both sides.
[0024]
As shown in FIG. 8B, the surface 1 includes a ground conductor 81 and an L-shaped element 82a. The L-shaped element 82a is connected to at least one short-circuit point 85 of the ground conductor.
As shown in FIG. 8C, the surface 2 is composed of an L-shaped element 82b and an MSL 83. The L-shaped elements 82a and 82b are electrically connected by through holes 84 arranged as close as possible. The MSL 83 is connected by a part of the L-shaped element 82b. Impedance can be controlled by this connection position.
[0025]
Further, FIGS. 9 to 11 are three-dimensional views constituting other inverted F antennas. 9 to 11, the element patterns formed on the surface 1 and the surface 2 are electrically connected through one through hole.
[0026]
FIG. 12 shows a simulation model of the antenna device of this embodiment. The inverted-F antenna and the ground conductor were configured in the same plane within 0.42λ (wavelength) × 0.5λ. The ground conductor is standardized by wire approximation.
[0027]
Next, simulation results are shown in FIGS. In FIG. 13 and FIG. 14, the current distribution on the thick line is divided vertically and horizontally. The horizontal axis of the graph indicates the location. For example, in the case of AB, it means between AB. The vertical axis of the graph indicates the current amplitude, and the value is normalized by the maximum value of the thick line 7. In FIG. 13, 6 and 7 indicate large values. In FIG. 14, since A is directly under the antenna, it naturally shows a large value, but is not shown because the level difference is large. In addition to A, B, C, and F show large values. Normally, the leakage current from the antenna is increased around the substrate, but in the inverted F antenna, the leakage current is smaller at the outer edge portion of the substrate where the short-circuit wire is present than at the outer edge portion of the substrate where the feeding point is present. It can be seen that it suffices to arrange the amplifier while avoiding the above.
[0028]
FIG. 15 schematically shows the current on the substrate and the antenna in order to explain this. A small antenna generally uses a method of miniaturizing an antenna using an image (also called a mirror image) of a ground conductor. In the case of FIG. 15A, the radiation from the inverted F antenna itself is dominant from the feed point that is perpendicular to the substrate. On the linear inverted F antenna, current is distributed also to the linear elements parallel to the substrate. As an image of the linear element, a current A74 having substantially the same amplitude and opposite phase is generated. The current A74 is canceled in the radiation field, but becomes a relatively large leakage current in the near field. With respect to the short-circuit line, there is an effect of increasing the radiation resistance at the feeding point, but there is little occurrence of leakage current in the ground conductor. For this reason, the generation ratio of the leakage current is greatly different between the short circuit line side and the linear element side of the substrate. In particular, a large amount of leakage current is generated on A74 of the substrate, and most of it is transmitted on the end 7 (74F) F74 of the end (outer edge portion) of the linear element side substrate.
[0029]
FIG. 15B shows a specific arrangement position of the amplifier. As shown in FIG. 15B, since the leakage current from the antenna is large in the region B, it is desirable to dispose the region B in the region Z away from the antenna and away from the end (outer edge) of the substrate except for the short-circuit line side. In other words, in the embodiment described above, the printed circuit board end (outer edge portion) on the short-circuit line side from the symmetrical axis AA ′ (axis 4 in FIG. 15B) is included, and An amplifier is placed in the center, which is inside from the end. Of course, it is more effective to arrange the amplifier on the axis of symmetry AA ′ because the leakage current is small.
[0030]
As described above, in the wireless device according to the present embodiment, since the coaxial line is used, the antenna can be arranged as high as possible in order to obtain a favorable radio wave environment, and the coaxial line connecting the wireless unit and the antenna is long and coaxial. Even if the line loss increases, the amplifier can compensate for the loss. Furthermore, when the inverted F antenna and the amplifier are configured on the same substrate, leakage current from the inverted F antenna is generated, but the amplifier can be arranged at a position to avoid this current, so that the problem can be minimized. . Particularly in the case of an inverted-F antenna, the position where the leakage current is small can be expanded.
[0031]
(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. The schematic configuration of the antenna device of the present embodiment and a radio device using the antenna device is the same as that shown in FIG.
An antenna is disposed on the outer edge of the dielectric substrate. The antenna is a monopole antenna, a helical antenna, an inverted F antenna, a meander antenna, a patch antenna, or the like, and is fed with a line such as a microstrip line or a coplanar line. Here, an example is shown in which an inverted F antenna is used as the antenna and a microstrip line is used as the line.
[0032]
The line is connected to the coaxial line via a connector, is connected to a radio unit at a remote position, and receives a received high-frequency signal at the radio unit. The connector is disposed at the center while avoiding the leakage current generated at the outer edge and avoiding the outer edge of the board.
[0033]
FIG. 16 shows a simulation model of the antenna device of this embodiment. The flat plate is approximated by a wire grid. In the same manner as in FIG. 12, the inverted F antenna and the ground conductor were formed in the same plane within 0.42λ × 0.5λ, and the linear elements were connected.
[0034]
Next, a simulation result is shown in FIG. FIG. 17 shows a current distribution on a linear element having a length of 5.5λ (wavelength) simulating a coaxial line. A solid line indicates a case where a linear element is disposed at the end of the ground plate facing the antenna, and a broken line indicates a case where the linear element is disposed inside the end of the ground conductor facing the antenna. The horizontal axis of the graph indicates the location, and 4F (the point where the line 4 and the line F overlap) indicates the point where the linear element is connected at the end of the ground conductor facing the antenna. The vertical axis of the graph indicates the current amplitude, and the value is normalized by the maximum value of the solid line. Comparing the maximum values of the solid line and the broken line, it can be seen that the broken line can reduce the leakage current to about 75%. Thus, it can be understood that it is only necessary to arrange the connector while avoiding the periphery of the substrate where the leakage current from the antenna increases. That is, as shown in FIG. 15 (b), the connector is arranged on the inner side from the end of the printed circuit board and in the central portion on the central axis AA ′ (axis 4 in FIG. 16). The impact can be minimized.
[0035]
As described above, in the wireless device according to the present embodiment, when the antenna and the connector are configured on the same substrate, leakage current from the antenna is generated. It is possible to minimize problems with connected radio units.
[0036]
(Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIGS. FIG. 18 is a diagram illustrating a schematic configuration of the antenna device of the present embodiment and a wireless device using the antenna device.
In the antenna device 180, an inverted F antenna 184 and an amplifier (for example, LNA) 182 are configured on the same substrate as the dielectric substrate 181. The inverted F antenna 184 is connected to an L-shaped element (not shown) patterned on the back surface of the substrate through a through hole 189. This L-shaped element is connected to the ground conductor at a short-circuit point. Then, a power supply bias is supplied via the coaxial cable 186, and the received high frequency signal (RF) is transmitted to the radio unit 20.
[0037]
The coaxial line 186 is disposed on the printed circuit board 181 from a point P that is a quarter wavelength away from the connector 185. This is similar to forming a balun that performs the same function as opening at a point a quarter away from the connector 185. When ideally functioning as a balun, leakage current from the antenna does not occur in the coaxial line beyond the point P that is a quarter away.
[0038]
FIG. 19 shows a simulation model of the wireless device of this embodiment. The flat plate is approximated by a wire grid. Similarly to FIG. 12, the inverted F antenna and the ground conductor are configured in the same plane within 0.42λ × 0.5λ, and a linear element 5.5λ (simulated on a coaxial line) is connected.
[0039]
Next, a simulation result is shown in FIG. FIG. 19 shows a current distribution on the linear element. The solid line shows the case where a linear element is arranged at the end of the ground plane facing the antenna, and the broken line shows the case where the linear element is arranged inside the end of the ground plane facing the antenna, and further a 0.25λ balun is configured. Yes. The horizontal axis of the graph indicates the location, and -0.5λ indicates the end of the ground plane facing the antenna. The vertical axis of the graph indicates the current amplitude, and the value is normalized by the maximum value of the solid line. Comparing the solid line and the broken line shows that the broken line can reduce the leakage current to about 50%.
[0040]
As described above, in the proposed wireless device, when the antenna and the connector are configured on the same board, a leakage current from the antenna is generated, but the connector can be arranged at a position to avoid this current, so the connection is made by a coaxial line. It is possible to minimize problems with the radio unit. In addition, when the antenna and the coaxial line are configured on the same substrate, leakage current from the antenna is generated in the coaxial line, but the connector of the coaxial line can be arranged at a position to avoid this current, and the quarter wavelength It can be seen that leakage current from the antenna can be reduced by configuring the balun.
[0041]
The present invention is not limited to the above embodiment, and can be variously modified as follows. For example, in the above embodiment, a notebook personal computer is used as a wireless device, but it can also be used for devices such as a desktop personal computer, a television, a display, a plasma display, an access point, a projector, a facsimile, and a printer. It is not limited.
[0042]
【The invention's effect】
As described above, according to the present invention, it relates to a device integrating an information processing device such as a personal computer and a wireless device, or a wireless device such as an access point, and the wireless unit and the antenna are configured on separate boards, In particular, in a configuration in which the antenna is arranged at a high position, it is possible to realize a wireless device in which an antenna and an amplifier are integrated on a printed board in order to compensate for the loss of the feed line, and a high frequency signal and a power supply bias are supplied through the same line.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an antenna device and a wireless device according to a first embodiment of the present invention. FIG. 2 shows a wireless device having an antenna formed on a notebook computer according to the first embodiment of the present invention. FIG. 3 is a diagram showing a simulation model of the wireless device according to the first embodiment of the present invention. FIG. 4 is a diagram showing a simulation result of the wireless device according to the first embodiment of the present invention. The figure which shows the simulation result of the radio | wireless apparatus which concerns on the 1st Embodiment of this invention. FIG. 6 The explanatory drawing of the radio | wireless apparatus which concerns on the 1st Embodiment of this invention, and the figure which shows the arrangement position of an amplifier. FIG. 8 is a diagram showing a schematic configuration of an antenna device and a radio device according to a second embodiment of the present invention. FIG. 8 is a three-dimensional view showing a detailed configuration of the antenna device according to the second embodiment of the present invention. Another antenna device according to the second embodiment FIG. 10 is a three-dimensional view showing a detailed configuration of another antenna device according to the second embodiment of the present invention. FIG. 11 is another three-dimensional diagram showing the other antenna device according to the second embodiment of the present invention. FIG. 12 is a diagram showing a simulation model of a wireless device according to the second embodiment of the present invention. FIG. 13 is a simulation result of the wireless device according to the second embodiment of the present invention. FIG. 14 is a diagram showing a simulation result of the radio apparatus according to the second embodiment of the present invention. FIG. 15 is an amplifier arrangement position with the explanatory diagram of the radio apparatus according to the second embodiment of the present invention. FIG. 16 is a diagram showing a simulation model of a wireless device according to the third embodiment of the present invention. FIG. 17 is a diagram showing simulation results of the wireless device according to the third embodiment of the present invention. The first of the present invention FIG. 19 is a diagram showing a schematic configuration of an antenna device and a radio device according to the embodiment of the present invention. FIG. 19 is a diagram showing a simulation model of the radio device according to the fourth embodiment of the invention. FIG. Showing the simulation results of the wireless device related to
DESCRIPTION OF SYMBOLS 1 ... Printed circuit board 2 ... Amplifier 3a, 3b ... Line 4 ... Antenna 5 ... Connector 6 ... Coaxial cable 7 ... Bias circuit 8 ... LPF
DESCRIPTION OF SYMBOLS 10 ... Antenna apparatus 11a, 11b ... Antenna 12a, 12b ... Coaxial cable 13 ... Radio | wireless part 14 ... Main body 15 ... Liquid crystal 20 ... Wireless apparatus 200 ... Notebook computer

Claims (10)

An antenna, a line connected to the antenna at a feeding point, and an amplifier that amplifies a high-frequency signal input from the line are disposed on a dielectric substrate,
The antenna is disposed at an outer edge portion of the dielectric substrate, and the amplifier is disposed at an inner side of the outer edge portion of the dielectric substrate and near a center on a symmetry axis of the dielectric substrate passing through the feeding point. An antenna device characterized by the above. An antenna, a first line connected to the antenna at a feeding point, an amplifier for amplifying a high-frequency signal input from the first line, a second line connected to an output terminal of the amplifier, An antenna unit on which a connector connected to the second line is disposed on a dielectric substrate;
A coaxial cable having one end connected to the connector, and a radio unit connected to the other end of the coaxial cable;
The antenna is disposed at an outer edge portion of the dielectric substrate, and the amplifier is disposed at an inner side of the outer edge portion of the dielectric substrate and near a center on a symmetry axis of the dielectric substrate passing through the feeding point. A wireless device characterized by the above. 3. The wireless device according to claim 2, wherein the connector is disposed inside an outer edge portion of the dielectric substrate and near a center on a symmetry axis of the dielectric substrate passing through the feeding point. A dielectric substrate; a ground conductor disposed on one surface of the dielectric substrate; a short-circuit point disposed on at least one side of the ground conductor plate; and a first terminal having one end connected to the ground conductor at the short-circuit point A second linear element disposed on the other surface of the dielectric substrate and electrically connected to the first linear element, and connected to the second linear element at a feeding point. A feed line that forms the microstrip line with the ground conductor, and an amplifier disposed on the feed line,
The second linear element is disposed on an outer edge portion of the dielectric substrate, and the amplifier is located on the inner side of the outer edge portion of the dielectric substrate and near the center on the axis of symmetry of the dielectric substrate passing through the feeding point. An antenna device characterized by being arranged in A dielectric substrate; a ground conductor disposed on one surface of the dielectric substrate; a short-circuit point disposed on at least one side of the ground conductor plate; and a first terminal having one end connected to the ground conductor at the short-circuit point A second linear element disposed on the other surface of the dielectric substrate and electrically connected to the first linear element, and connected to the second linear element at a feeding point. A feed line that forms the microstrip line with the ground conductor, and an amplifier disposed on the feed line,
The second linear element is disposed at an outer edge portion of the dielectric substrate, and the amplifier includes a printed circuit board outer edge portion on a short-circuit point side of the dielectric substrate, and a central portion that is inside the other outer edge portion of the substrate. An antenna device characterized by being arranged in A dielectric substrate; a ground conductor disposed on one surface of the dielectric substrate; a short-circuit point disposed on at least one side of the ground conductor plate; and a first terminal having one end connected to the ground conductor at the short-circuit point A second linear element disposed on the other surface of the dielectric substrate and electrically connected to the first linear element, and connected to the second linear element at a feeding point. An antenna unit comprising a feed line that forms the microstrip line with the ground conductor, an amplifier disposed on the feed line, and a connector connected to the feed line on the output side of the amplifier;
A coaxial cable having one end connected to the connector, and a radio unit connected to the other end of the coaxial cable;
The antenna is disposed at an outer edge portion of the dielectric substrate, and the amplifier is disposed at an inner side of the outer edge portion of the dielectric substrate and near a center on a symmetry axis of the dielectric substrate passing through the feeding point. A wireless device characterized by the above. A dielectric substrate; a ground conductor disposed on one surface of the dielectric substrate; a short-circuit point disposed on at least one side of the ground conductor plate; and a first terminal having one end connected to the ground conductor at the short-circuit point A second linear element disposed on the other surface of the dielectric substrate and electrically connected to the first linear element, and connected to the second linear element at a feeding point. An antenna unit comprising a feed line that forms the microstrip line with the ground conductor, an amplifier disposed on the feed line, and a connector connected to the feed line on the output side of the amplifier;
A coaxial cable having one end connected to the connector, and a radio unit connected to the other end of the coaxial cable;
The second linear element is disposed at an outer edge portion of the dielectric substrate, and the amplifier includes a printed circuit board outer edge portion on a short-circuit point side of the dielectric substrate, and a central portion that is inside the other outer edge portion of the substrate. A wireless device arranged in A dielectric substrate; a ground conductor disposed on one surface of the dielectric substrate; a short-circuit point disposed on at least one side of the ground conductor plate; and a first terminal having one end connected to the ground conductor at the short-circuit point A second linear element disposed on the other surface of the dielectric substrate and electrically connected to the first linear element, and connected to the second linear element at a feeding point. An antenna unit comprising a feed line that forms the microstrip line with the ground conductor, an amplifier disposed on the feed line, and a connector connected to the feed line on the output side of the amplifier;
A coaxial cable having one end connected to the connector, and a radio unit connected to the other end of the coaxial cable;
The antenna is disposed on an outer edge portion of the dielectric substrate, and the connector is disposed on the inner side of the outer edge portion of the dielectric substrate and in the vicinity of the center on the symmetry axis of the dielectric substrate passing through the feeding point. A wireless device characterized by the above. A dielectric substrate; a ground conductor disposed on one surface of the dielectric substrate; a short-circuit point disposed on at least one side of the ground conductor plate; and a first terminal having one end connected to the ground conductor at the short-circuit point A second linear element disposed on the other surface of the dielectric substrate and electrically connected to the first linear element, and connected to the second linear element at a feeding point. An antenna unit comprising a feed line that forms the microstrip line with the ground conductor, an amplifier disposed on the feed line, and a connector connected to the feed line on the output side of the amplifier;
A coaxial cable having one end connected to the connector, and a radio unit connected to the other end of the coaxial cable;
The second linear element is disposed at an outer edge portion of the dielectric substrate, and the connector includes a printed circuit board outer edge portion on a short circuit point side of the dielectric substrate, and a central portion that is inside from the other outer edge portion of the substrate. A wireless device arranged in 10. The radio apparatus according to claim 2, further comprising a quarter of the frequency used by the coaxial cable, the radio apparatus being arranged on the dielectric substrate. .

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