JP2012156657A - Radio communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication device including a low cost transmission line which transmits signals between an antenna and a high frequency circuit section with low loss.SOLUTION: An antenna part 122 is disposed at a position spaced apart from an input/output part 112b of a high frequency circuit part 111, and an antenna radiation conductor part 124 of the antenna part 122 are connected with the input/output part 112b of the high frequency circuit part 111 through a transmission line part 130. The transmission line part 130 is formed on a low loss substrate 120 that is the same substrate where the antenna parts 121, 122 are mounted, and the antenna parts 121, 122 and the transmission line part 130 are integrated to form a transmission line integrated antenna 101. When the transmission line integrated antenna 101 is mounted on a housing 102, elastic members 141 to 144 enable the transmission line integrated antenna 101 to be connected with a circuit board 110 and a main ground pattern 113.

Description

  The present invention relates to a wireless communication apparatus including a transmission line integrated antenna in which an antenna and a transmission line for connecting the antenna to a high frequency circuit unit are integrated.

  In recent years, there has been an increasing demand for smartphones in which a mobile phone has a high-performance information terminal function. Smartphones require the use of large-capacity wireless data communication compared to conventional mobile terminals. In addition, use by wireless communication is also increasing in personal computers (PCs), and large-capacity wireless data communication is still necessary. In order to meet such needs, communication standards such as WLAN (IEEE802.11n), WiMax, LTE, and the like have been sequentially introduced. Under such circumstances, as one of the main technologies for improving communication quality and transmission capacity, a technology called MIMO (Multiple-Input Multiple-Output) that performs communication using a plurality of antennas for at least the same reception frequency band Is important.

  In order to apply the MIMO technology, it is important to keep the correlation between antennas low (correlation coefficient is small) so that a plurality of antennas receive different signals in the same frequency band. In general, the correlation coefficient can be reduced by sufficiently increasing the distance between the antennas.

  When multiple antennas are mounted on various information communication terminals represented by smartphones, the input / output units for connecting the multiple antennas to the circuit unit that processes high-frequency signals are placed close to each other within a predetermined area. Is provided. Therefore, in order to increase the distance between the antennas sufficiently, it is necessary to increase the distance between at least some of the antennas and their input / output units, and some transmission line is required to connect the antennas.

  Patent Documents 1 to 3 disclose techniques related to a transmission line that connects an antenna and an input / output unit of a high-frequency circuit unit. In patent document 1, as shown to Fig.6 (a), the antenna 900 and the main circuit board 901 are spaced apart, and the coaxial cable 902 is used as a transmission line which connects between them.

  Further, in Patent Document 2, as shown in FIG. 6B, a projecting wall 913 of a dielectric material protruding outward from a dielectric substrate 912 on which a feeding radiation electrode 911 is formed is provided on the surface of the ground portion 914. A transmission line 917 having a set line length connecting the feeding side end 915 of the feeding radiation electrode 911 and the input / output part 916 of the circuit is formed on the projecting wall 913. The transmission line 917 serves as a phase adjustment unit that adjusts the phase of the feed power supplied from the circuit for wireless communication to the feed radiation electrode 911. It is described that the transmission line 917 is a microstrip line.

  Furthermore, in Patent Document 3, as shown in FIG. 6C, the radiation electrode 921 and the ground electrode 924 insulated from the radiation electrode 921 are etched on one main surface of the insulator sheet 923, and the transmission line 922 is etched on the other main surface. A planar antenna unit 920 formed by such means is disclosed. A transmission line connection portion 926 and earth electrode connection portions 925 and 927 for connecting a connector terminal by soldering are formed at the end of the transmission line 922 opposite to the radiation electrode 921.

US7492321 JP 2007-306507 A JP-A-10-75115

  However, when a coaxial cable is used as a transmission line as in Patent Document 1, low-loss signal transmission is possible, but in addition to the high cost of the coaxial cable, components such as connectors and matching circuits There is a problem that the score increases and the cost becomes high. In addition, the transmission line described in Patent Document 2 is for the purpose of adjusting the impedance of the antenna, and the distance is short, and it is possible to transmit a relatively long distance between the antenna and the input / output unit of the high-frequency circuit with low loss. Have difficulty.

  Furthermore, in Patent Document 3, a transmission line is combined with a ground electrode to form a microstrip line, but a connector is connected at a relatively short distance from the radiation electrode. Although it is conceivable to lengthen the insulator sheet and the transmission line, in the configuration in which the ground electrode is connected to the main ground plate of the small high-frequency device only by the ground electrode connection portion provided at one end of the insulator sheet, the distance becomes long. It is difficult to reduce the loss in the transmission line.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a wireless communication device including a low-cost transmission line capable of transmitting a signal with low loss between an antenna and a high-frequency circuit unit. To do.

  According to a first aspect of the wireless communication apparatus of the present invention, one or more antenna units, a high-frequency circuit unit connected to the antenna unit and performing a predetermined communication process, and the high-frequency circuit unit mounted on one surface are installed. And a circuit board having a main base plate formed on the surface thereof, wherein the one or more antenna parts are each formed on a low-loss base material. And at least one of the antenna units is arranged such that the antenna radiation conductor part of the antenna part and the input / output part of the high-frequency circuit are separated from each other by a predetermined distance or more, and the antenna radiation conductor part of the antenna part arranged apart from the antenna part A signal line formed by a conductor pattern on one surface of the low-loss substrate to the position of the input / output unit connected to the ground pattern formed on the other surface of the low-loss substrate and the low-loss By the thickness of the substrate A transmission line portion that is arranged at a predetermined interval to form a microstrip line, and an end portion of the signal line opposite to the antenna radiation conductor portion is a predetermined elastic member at the input / output portion Two or more points including the vicinity of both ends of the signal line on the ground pattern are electrically connected to the main ground plate via another elastic member.

  Another aspect of the wireless communication apparatus of the present invention is characterized in that two or more of the antenna units are provided and a MIMO (Multiple-Input Multiple-Output) operation is performed in at least one reception band.

  Another aspect of the wireless communication device of the present invention is characterized in that the antenna radiation conductor is formed on one or both sides of the low-loss substrate excluding a region where the ground pattern is formed.

  Another aspect of the wireless communication device of the present invention is characterized in that the antenna radiation conductor part of the antenna part and the input / output part which are arranged apart from each other are separated by 50 mm or more.

  Another aspect of the wireless communication apparatus of the present invention is characterized in that the thickness of the low-loss substrate is 0.2 mm or more.

  Another aspect of the wireless communication device of the present invention is characterized in that the low-loss base material has flexibility and can be deformed and accommodated in accordance with the shape of the casing.

  Another aspect of the wireless communication apparatus of the present invention is characterized in that the low-loss base material is a resin foam containing closed cells inside.

  In another aspect of the wireless communication apparatus of the present invention, the resin foam has a foam diameter of the closed cells of 20 μm or less.

  In another aspect of the wireless communication apparatus of the present invention, a width of the low loss base material and the ground pattern in the transmission line portion is 8 mm or less, and the transmission line portion is approximately 90 degrees with respect to the antenna radiation conductor portion. It is bent and arranged along the wall surface of the casing.

  Another aspect of the wireless communication device of the present invention is characterized in that the transmission line portion is arranged with the ground pattern facing the wall surface of the housing.

  In another aspect of the wireless communication apparatus of the present invention, the circuit board includes a metal frame for mounting two or more circuit blocks and electromagnetically separating each of the circuit blocks, and forms the transmission line unit. The material and the ground pattern have the same width as the circuit board, and the ground pattern is pressed against and placed on the metal frame.

  In another aspect of the wireless communication apparatus of the present invention, the ground pattern has a thickness of 100 μm or more.

  In another aspect of the wireless communication apparatus of the present invention, a heat diffusion pattern connected to the ground pattern through a through hole is formed on the surface of the low loss base material on which the signal line is formed. It is characterized by being formed apart by 200 μm or more.

  ADVANTAGE OF THE INVENTION According to this invention, a radio | wireless communication apparatus provided with the low-cost transmission line which can transmit a signal with a low loss between an antenna and a high frequency circuit part can be provided.

It is the bottom view and sectional drawing which show the structure of the radio | wireless communication apparatus which concerns on 1st Embodiment of this invention. It is a bottom view which shows the partial structure of the radio | wireless communication apparatus which concerns on 2nd Embodiment of this invention. It is the bottom view and sectional drawing which show the structure of the radio | wireless communication apparatus which concerns on 3rd Embodiment of this invention. It is the bottom view and sectional drawing which show the structure of the radio | wireless communication apparatus which concerns on 4th Embodiment of this invention. It is the bottom view and side view of the conventional radio | wireless communication apparatus which does not incorporate a transmission line integrated antenna. It is a perspective view which shows the prior art example of the transmission line which connects an antenna and a high frequency circuit part.

  A wireless communication apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In addition, about each structural part which has the same function, the same code | symbol is attached | subjected and shown for simplification of illustration and description.

  A wireless communication apparatus according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1A is a bottom view showing the configuration of the wireless communication apparatus 100 according to the first embodiment, and FIG. 1B is a cross-sectional view taken along line AA shown in FIG. The wireless communication device 100 includes a circuit board 110 on which a high-frequency circuit unit 111 having a wireless communication function is mounted, a low-loss base 120 on which two antenna units 121 and 122 are mounted, a battery 104 that supplies necessary power, A housing 102 for storing them and a display unit (LCD or the like) 103 for displaying to a user or the like are provided. The bottom view shown in FIG. 1A is a view of the wireless communication device 100 as seen from the battery 104 side, excluding the back surface of the housing 102 and the battery 104.

  The antenna parts 121 and 122 have antenna radiation conductor parts 123 and 124 formed at both ends of the low-loss base material 120, respectively. The antenna radiation conductors 123 and 124 can be formed on one surface or both surfaces of the low-loss substrate 120 using copper foil lamination, plating, or vapor deposition.

  The wireless communication apparatus 100 according to the present embodiment includes at least two antenna units 121 and 122 that operate in the same reception frequency band, and can be applied to a smartphone or a PC that performs a MIMO operation. In order to perform the MIMO operation, it is preferable to increase the distance between the two antenna units 121 and 122 to keep the correlation low. Therefore, in the wireless communication apparatus 100, the antenna units 121 and 122 are disposed at both ends in the longitudinal direction of the casing 102, and the length of the low-loss base material 120 is substantially equal to the length of the casing 102 in the longitudinal direction. In this way, antenna radiating conductor portions 123 and 124 are formed at both ends, respectively.

  The antenna units 121 and 122 are both connected to the input / output units 112a and 112b of the high-frequency circuit unit 111 and operate. Further, the two input / output units 112a and 112b are arranged close to each other. Accordingly, when the two antenna units 121 and 122 are arranged apart from each other, at least one of them is arranged at a position away from the input / output unit 112a or 112b. Therefore, a transmission line for connecting the antenna unit 121 or 122 and the input / output unit 112a or 112b arranged at a distant position is necessary.

  In the present embodiment, the antenna unit 122 is disposed at a position away from the input / output unit 112b of the high-frequency circuit unit 111, and between the antenna radiation conductor unit 124 of the antenna unit 122 and the input / output unit 112b of the high-frequency circuit unit 111. Are connected by a transmission line unit 130. The transmission line unit 130 is formed on the same low-loss substrate 120 as the antenna units 121 and 122, and the antenna units 121 and 122 and the transmission line unit 130 are integrated to form the transmission line integrated antenna 101. The transmission line unit 130 connected to the antenna radiation conductor unit 124 is connected to the input / output unit 112b.

  The transmission line unit 130 has a signal line 131 patterned on one surface of the low-loss base material 120, and a ground pattern 132 is formed on the other surface of the low-loss base material 120. The signal line 131 and the ground pattern 132 are separated by a distance corresponding to the thickness of the low-loss base material 120, and a microstrip line is formed by combining both. The thickness of the low loss substrate 120 preferably has at least 0.2 mm. When the antenna radiating conductor portions 123 and 124 are also formed on the same surface as the ground pattern 132, the ground pattern 132 is formed in a region excluding the region where the antenna radiating conductor portions 123 and 124 are formed.

  The low-loss member 120 preferably has flexibility. Accordingly, the low-loss member 120 on which the antenna units 121 and 122 and the transmission line unit 130 are mounted can be deformed according to the shape of the housing 102, and the transmission line integrated antenna 101 can be reduced in a small space in the housing 102. It can be easily installed. At this time, the transmission line integrated antenna 101 may be fixed to the inside of the housing 102 by an adhesive tape or heat welding. Further, it is preferable to use a low loss member 120 having a dielectric loss tangent of 0.01 or less. For example, a resin foam containing closed cells inside can be used. The resin foam is preferably composed of bubbles having a foam diameter of 20 μm or less. When a resin foam is used for the low-loss member 120, the antenna radiation conductors 123 and 124, the signal line 131, and the ground pattern 132 can be formed by electroless plating. Further, by applying electroplating after electroless plating, the conductor layers of the radiation conductor portions 123 and 124, the signal line 131, and the ground pattern 132 can be thickened.

  In this embodiment, the antenna parts 121 and 122 and the transmission line part 130 can be integrally mounted by housing the transmission line integrated antenna 101 in a predetermined position in the housing 102. When the transmission line integrated antenna 101 is disposed at a predetermined position in the housing 102, the antenna radiation conductor 123 of the antenna part 121 is connected to the input / output part 112a, and the antenna part 122 of the signal line 131 of the transmission line part 130 is connected. In order to connect the end opposite to the connected end to the input / output unit 112b, elastic members 141 and 142 are provided on the high-frequency circuit unit 111 side or the low-loss substrate 120 side, respectively. Yes.

  Further, in order to connect the ground pattern 132 formed on the other surface of the low-loss base material 120 to the ground pattern 113 of the circuit board 110 that is the main ground plate of the wireless communication device 100, a transmission line unit Elastic members 143 and 144 are provided near both ends of 130, respectively. The elastic members 143 and 144 are also provided on either the high-frequency circuit unit 111 side or the low-loss base material 120 side. As described above, by providing the elastic members 143 and 144 so that the ground pattern 132 and the ground pattern 113 are connected in the vicinity of both ends of the transmission line unit 130, transmission loss with respect to the transmission line unit 130 having a long distance is transmitted. Low microstrip line can be formed.

  In the wireless communication device 100 of the present embodiment, the distance between the antenna radiation conductor portion 124 and the input / output portion 112b of the high-frequency circuit portion 111 is, for example, 50 mm or more, which corresponds to about half the length of the casing 102 in the longitudinal direction. However, it is possible to realize a low-loss transmission line unit 130 having a transmission loss of 0.2 dB or less in the vicinity of 2.5 GHz.

  By providing the elastic members 141 to 144 as described above, the antenna can be obtained by simply mounting the transmission line integrated antenna 101 in which the antenna parts 121 and 122 and the transmission line part 130 are integrated at a predetermined position in the housing 102. The parts 121 and 122 can be connected to the circuit board 110, and the ground pattern 132 can be connected to the main ground pattern 113. In the present embodiment, due to the elastic force of the elastic members 141 to 144, the antenna radiation conductor 123 and the input / output unit 112a are connected, the signal line 131 and the input / output unit 112b are connected, and the ground patterns 113 and 132 are connected. Can be stably maintained. As the elastic members 141 to 144, for example, a spring can be used.

  In the wireless communication device 100 of the present embodiment, the signal line 131 formed with a conductor pattern on the surface of the low-loss substrate 120 is used as a transmission line for connecting the antenna unit 122 and the high-frequency circuit unit 111, and the antenna unit 121, Since the transmission line integrated antenna 101 is formed by integrating the transmission line unit 122 and the transmission line unit 130, the number of parts can be reduced and the cost can be reduced compared to the conventional wireless communication apparatus using a coaxial cable. it can.

  The antenna parts 121 and 122 and the transmission line part 130 can also be formed using FPC. However, since the FPC is usually made of a dielectric having a thickness of about 0.05 μm, for example, 50Ω. In order to construct a transmission line, it is necessary to make the line width of the signal line very thin, and the conductor loss in the signal line becomes remarkable. In addition, since the ground level becomes unstable, the influence of noise becomes a problem. On the other hand, in the wireless communication device 100 of this embodiment, since the thickness of the low-loss base material 120 is 0.2 mm or more, the cross-sectional area of the signal line 131 can be secured to some extent, and the generated conductor loss is reduced. Can do. In addition, the influence of noise can be reduced by stabilizing the ground level.

  In the case where a microstrip line is formed on a circuit board as a transmission line, a glass epoxy board (FR-4) that is easy to process and has a low cost has been used as a circuit board. However, the glass epoxy substrate has poor dielectric characteristics, and when a transmission line having a long distance is formed using the glass epoxy substrate, the dielectric loss becomes significant. On the other hand, in the wireless communication device of this embodiment, since the microstrip line is formed using a low-loss base material such as a resin foam, the dielectric loss can be greatly reduced.

(Second Embodiment)
A wireless communication apparatus according to the second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a bottom view showing a partial configuration of the wireless communication apparatus 200 of the second embodiment. The figure shows a developed view of a transmission line integrated antenna 201 in which antenna portions 221 and 222 and a transmission line portion 230 are formed and integrated on a low-loss base material 220, and a wireless communication apparatus incorporating the same. 200 casings 102 are indicated by broken lines. Also in this embodiment, the low-loss base material 220 has flexibility, and is formed of, for example, a resin foam containing closed cells inside.

  As shown in FIG. 2, the transmission line integrated antenna 201 of the present embodiment is formed in a size that protrudes from the housing 102. That is, the portion of the low-loss base material 220 on which the antenna portions 221 and 222 are mounted is formed so as to protrude from the housing 102 in the vertical direction and the horizontal direction in the drawing. Further, the portion of the low-loss base material 220 on which the transmission line unit 230 is mounted is formed so as to protrude from the housing 102 in either the left or right direction of the drawing (left direction in FIG. 2). Each protrusion width is equal to or less than the thickness of the wireless communication apparatus 200.

  By forming the transmission line integrated antenna 201 as described above, when the antenna is housed in the housing 102, the low-loss base material 220 is disposed along the side surface of the housing 102 as indicated by an arrow in FIG. It can be folded and stored approximately 90 degrees in the thickness direction. In order to accommodate the transmission line unit 230 along the side surface of the housing 102, the width of the low-loss base material and the ground pattern located in the transmission line unit 230 should be smaller than the thickness of the wireless communication device 200, and not more than 8 mm. Is preferable. As a result, the antenna units 221 and 222 and the transmission line unit 230 can be arranged in a slight space provided along the wall surface of the housing 102. In addition, when the transmission line part 230 is bent along the side surface of the housing 102, the ground pattern located in the transmission line part 230 is preferably bent outward (side facing the wall surface of the housing 102). Thereby, it is possible to reduce the external noise from the signal line 231. Moreover, it can make it difficult to receive the influence of the human hand part with respect to a transmission line at the time of use.

  In the present embodiment, the elastic members 241 and 242 that connect the antenna radiation conductors 223 and 224 of the antenna units 221 and 222 and the input / output unit of a high-frequency circuit unit (not shown), and the other surface of the low-loss base material 220. The elastic members 243 and 244 that connect the ground pattern formed on the circuit board and the ground pattern (both not shown) of the circuit board are both built in the housing 102.

(Third embodiment)
A wireless communication apparatus according to the third embodiment of the present invention will be described with reference to FIG. FIG. 3A is a bottom view showing the configuration of the wireless communication apparatus 300 according to the third embodiment, and FIG. 3B is a cross-sectional view taken along line AA shown in FIG. The bottom view shown in FIG. 3A is a view of the wireless communication apparatus 300 viewed from the battery 103 side, except for the back surface of the casing 102 and the battery 103. In the wireless communication apparatus 300 of the present embodiment, only one antenna unit 322 is mounted on the low-loss base material 320 to form the transmission line integrated antenna 301.

  Even if there is only one antenna mounted on the wireless communication device, if the antenna placement position is restricted and it is necessary to place the antenna away from the input / output unit of the high-frequency circuit, the transmission of this embodiment A line integrated antenna 301 can be used. In the present embodiment, the antenna unit 322 disposed at a position away from the high-frequency circuit unit 111 is connected to the input / output unit 112 b of the high-frequency circuit unit 111 using the conductive line 330. That is, the antenna radiating conductor 324 of the antenna unit 322 is connected to one end of the signal line 331, and the other end of the signal line 331 is connected to the input / output unit 112 b by the elastic member 342. In addition, the ground pattern 332 formed on the other surface of the low-loss base material 320 is connected to the ground pattern 113 of the circuit board 110 by elastic members 343 and 344.

  The transmission line integrated antenna 301 of the present embodiment is configured using an antenna unit 322 and a low-loss base material 320 having a size corresponding to the transmission line unit 330 in the section from the antenna unit 322 to the input / output unit 112b. As described above, in the wireless communication device of the present invention, the size and shape of the low-loss substrate are appropriately determined according to the number of antennas, and the antenna radiation conductor portion, the signal line, and the ground pattern are formed thereon. A transmission line integrated antenna can be manufactured. And the produced transmission line integrated antenna can be connected to the ground pattern which is the main ground plane of the input / output part of a high frequency circuit and a radio | wireless communication apparatus using an elastic member.

(Fourth embodiment)
A wireless communication apparatus according to the fourth embodiment of the present invention will be described with reference to FIGS. FIG. 4 shows a battery including a circuit board 410 and a wireless communication apparatus 400 according to a fourth embodiment that includes a transmission line integrated antenna 401 having antenna parts 421 and 422 and a transmission line part 430 formed on a low-loss base material 420. It is the bottom view seen from the side, and a side view. FIG. 5 shows a bottom view and a side view of a conventional wireless communication apparatus that does not incorporate the transmission line integrated antenna 401.

  In the present embodiment, the wireless communication apparatus 400 incorporates a circuit board 410 on which a plurality of circuit blocks 451 to 453 made of an IC and discrete components as shown in FIG. 5 are mounted. In such a circuit board 410, metal frames 454 to 456 surrounding each of the circuit blocks 451 to 453 are provided to electromagnetically separate the circuit blocks 451 to 453. Conventionally, each of the metal frames 454 to 456 has been covered with a predetermined metal lid in order to enhance the electromagnetic shielding effect. Since heat is released from each of the circuit blocks 451 to 453, it is preferable that the released heat is diffused and released to the outside for the wireless communication device 400 incorporating the circuit board 410. .

  Therefore, in this embodiment, as shown in FIG. 4, the width of the transmission line portion 430 of the transmission line integrated antenna 401 is set to the same size as the width of the circuit board 410, and the transmission line portion 430 is replaced with a conventional metal lid. The metal frames 454 to 456 are covered. The ground pattern 432 formed in the transmission line portion 430 is formed on almost the entire surface in the width direction and has a width comparable to that of the circuit board 410. Then, the ground pattern 432 is pressed and placed on the metal frames 454 to 456 toward the circuit board 410 side. As a result, the same shielding effect as that of the conventional metal lid can be obtained, and the heat released from the transmitting components 451 to 453 can be easily diffused to the outside by diffusing on the surface of the ground pattern 432.

  In order to allow heat to diffuse efficiently on the ground pattern 432, the thickness of the ground pattern 432 is preferably set to 100 μm or more.

  In addition, heat propagates to the signal line 431 of the transmission line 430 and is easily released to the outside. In order to perform heat diffusion more efficiently, a metal heat diffusion pattern 461 may be further provided on one surface of the low-loss substrate 420 that is separated from the signal line 431 by a predetermined distance or more. The thermal diffusion pattern 461 is preferably separated from the signal line 431 by 200 μm or more. By connecting the thermal diffusion pattern 461 to the ground pattern 432 through a through hole, the heat absorbed by the ground pattern 432 is transmitted to the thermal diffusion pattern 461 through the through hole and radiated from the thermal diffusion pattern 461 to the outside. As a result, the heat dissipation effect can be further enhanced. Furthermore, by mounting the transmission line integrated antenna 401 of this embodiment, it is also possible to diffuse the heat radiation from the battery 104 and release it to the outside.

  In the present embodiment, the transmission line portion 430 has the same width as that of the circuit board 410 and is placed on the circuit board 410 so as to cover the circuit board 410. However, the metal placed on the metal frames 454 to 456 conventionally used. Since the lid is unnecessary, there is no possibility that the low-loss base material 420 cannot be mounted due to the restriction due to the thickness of the casing 102. In addition, since the low-loss base material 420 has flexibility, the low-loss base material 420 absorbs variations in the height of the circuit blocks 451 to 453 and the metal frames 454 to 456 and adheres to each other. Can do. Thereby, it becomes possible to enhance the shielding effect and the heat dissipation effect.

  Since the transmission line integrated antenna 401 of the present embodiment is a single large substrate, the matching circuit portion is configured with distributed constants, the antenna characteristics are improved by changing the shape of the ground pattern 432, It is also possible to reduce unnecessary radiation caused by the ground pattern 432.

  Note that the description in the present embodiment shows an example of the wireless communication apparatus according to the present invention, and the present invention is not limited to this. The detailed configuration, detailed operation, and the like of the wireless communication apparatus in this embodiment can be changed as appropriate without departing from the spirit of the present invention.

100, 200, 300 Wireless communication apparatus 101, 201, 301, 401 Transmission line integrated antenna 102 Housing 103 LCD
104 Battery 110, 410 Circuit board 111 High frequency circuit section 112a, 112b Input / output section 113, 132, 332, 432 Ground pattern 120, 220, 320, 420 Low loss base material 121, 122, 221, 222, 321 Antenna section 123, 124, 223, 224, 323 Antenna radiation conductor portions 130, 230, 330, 430 Transmission line portions 131, 231, 331, 431 Signal lines 141-144, 241-244, 341, 343, 344 Elastic members 451-453 Circuit block 454 to 456 Metal frame 461 Thermal diffusion pattern

Claims (13)

One or more antenna units, a high-frequency circuit unit that is connected to the antenna unit and performs predetermined communication processing, and a circuit board on which the high-frequency circuit unit is mounted on one surface and a main ground plate is formed on the other surface A wireless communication device provided inside a housing,
Each of the one or more antenna parts is formed on a low-loss base material with each antenna radiation conductor part,
At least one of the antenna parts is arranged such that the antenna radiation conductor part of the antenna part and the input / output part of the high-frequency circuit are separated by a predetermined distance or more,
A signal line formed with a conductor pattern on one surface of the low-loss base material is connected to the antenna radiation conductor part of the antenna part arranged at a distance to the position of the input / output part,
A transmission line portion that forms a microstrip line with a ground pattern formed on the other surface of the low-loss base material and an interval defined by the thickness of the low-loss base material;
An end of the signal line opposite to the antenna radiation conductor is connected to the input / output unit with a predetermined elastic member, and two or more points including the vicinity of both ends of the signal line on the ground pattern are different. A wireless communication apparatus, wherein the wireless communication apparatus is electrically connected to the main base plate via an elastic member. The wireless communication apparatus according to claim 1, wherein two or more antenna units are provided to perform MIMO (Multiple-Input Multiple-Output) operation in at least one reception band. The radio communication apparatus according to claim 1, wherein the antenna radiation conductor is formed on one side or both sides of the low-loss base material excluding a region where the ground pattern is formed. 4. The wireless communication apparatus according to claim 1, wherein the antenna radiation conductor part of the antenna part and the input / output part that are arranged apart from each other are separated by 50 mm or more. 5. The wireless communication apparatus according to any one of claims 1 to 4, wherein the thickness of the low-loss base material is 0.2 mm or more. The wireless communication apparatus according to claim 1, wherein the low-loss base material has flexibility and can be accommodated by being deformed according to the shape of the casing. The wireless communication device according to any one of claims 1 to 6, wherein the low-loss base material is a resin foam containing closed cells inside. The wireless communication device according to claim 7, wherein the resin foam has a foam diameter of the closed cells of 20 μm or less. The width of the low loss base material and the ground pattern in the transmission line portion is 8 mm or less, and the transmission line portion is bent approximately 90 degrees with respect to the antenna radiation conductor portion and disposed along the wall surface of the casing. The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus is a wireless communication apparatus. The wireless communication apparatus according to claim 9, wherein the transmission line unit is arranged with the ground pattern facing a wall surface of the housing. The circuit board includes two or more circuit blocks and a metal frame for electromagnetically separating each of the circuit blocks.
The low-loss base material and the ground pattern forming the transmission line portion have the same width as the circuit board,
The wireless communication apparatus according to claim 1, wherein the ground pattern is placed while being pressed against the metal frame. The wireless communication apparatus according to claim 11, wherein the ground pattern has a thickness of 100 μm or more. A heat diffusion pattern connected to the ground pattern through a through hole is formed on the surface of the low-loss substrate on which the signal line is formed, and is formed at a distance of 200 μm or more from the signal line. The wireless communication apparatus according to claim 11 or 12.

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