JP6645950B2 - Board type antenna - Google Patents

Description

  The present invention relates to a substrate antenna for transmitting and receiving signals in a plurality of resonance frequency bands.

  As conventional board-type antennas, there are Japanese Patent No. 4834551 (Patent Document 1) and Japanese Patent No. 5698606 (Patent Document 2). Patent Literature 1 discloses a planar coupler and an antenna pattern, wherein the planar coupler is provided on an RF double-sided printed circuit board (hereinafter, referred to as a “double-sided board”) and one first conductive surface of the double-sided board. A conductor plane primary loop pattern (hereinafter, referred to as a "C-shaped primary loop") formed and partially cut, and a conductor plane partially formed and cut on the other second conductor surface of the double-sided board A secondary loop pattern (hereinafter, referred to as a “C-type secondary loop”), wherein the C-type primary and C-type secondary loops are opposed to each other with a middle-layer dielectric plate of the double-sided substrate interposed therebetween; Capacitive coupling and inductive coupling (hereinafter, referred to as “CM coupling”) are mutually performed. In the equivalent circuit of the planar coupler, the distributed coupling capacitance between the C-type primary loop and the secondary loop in the CM coupling. Are connected in series, and the second conductor A secondary transmission circuit having a structure that can be regarded as a coplanar line connected to each terminal of the C-shaped secondary loop is formed, and the antenna pattern connected to the secondary transmission circuit is formed in the secondary transmission circuit. An antenna system in which a planar coupler is integrally formed is described.

  Further, in Patent Document 2, a loop-shaped first joint portion pattern formed by dividing one portion is formed on one substrate surface of a substrate made of a dielectric, and both ends of the divided position of the first joint portion pattern are formed. In the substrate antenna to which the antenna elements constituting the first antenna are connected, a feeding point is formed at one end of the antenna element constituting the first antenna on one of the substrate surfaces of the substrate, and a feeding point is formed near the feeding point. A grounding portion having a grounding point is connected to the feeding point, a central signal line of the coaxial cable is connected to the grounding point, and an outer peripheral shielded wire of the coaxial cable is connected to the grounding point, and the other side substrate of the substrate is connected. On the surface, a loop-shaped second joint pattern is formed at one position at a position facing the first joint pattern, and second antennas are formed at both ends of the divided position of the second joint pattern. Wherein the first antenna and the second antenna are configured to be able to transmit and receive transmission / reception signals from a common feed point and the ground point, respectively. .

Patent No. 4834551 Patent No. 5698606

  However, in the conventional substrate-type antenna configuration as described above, the substrate becomes large if it is desired to have a large number of resonance frequencies.

  Therefore, an object of the present invention is to provide a board antenna that can transmit and receive a plurality of frequency signals through one signal line pattern while using a smaller board.

In order to achieve the above object, the present invention has a one-side coupling pattern and a one-side antenna element connected to a transmission / reception pattern on one side of a substrate formed of a dielectric, and the coupling pattern on a back side of the substrate. Loop-type coupling having a backside coupling pattern and a backside antenna element capacitively coupled to each other, wherein the one-side-side coupling pattern is formed by integrally coupling a plurality of closed loops each having a space. And the back side connection pattern is a plurality of closed loop independent connection pattern having another space substantially opposed to the space of the closed loop connection type connection pattern.

  According to such a configuration, further miniaturization can be achieved by the integrated closed loop coupling type coupling portion pattern, and a plurality of resonance frequency signals are transmitted and received through one signal line pattern while using a small substrate. Can be.

  Further, in addition to the above configuration, the present invention further comprises the one-side antenna element connected to the closed-loop coupling type coupling section pattern, and the back-side antenna element connected to the closed-loop independent coupling section pattern, It is characterized in that it is arranged on the same side of the joint pattern and the closed-loop independent joint pattern, and a ground pattern is arranged at a position opposite to the one-side antenna element in the closed-loop joint pattern.

  According to such a configuration, it is possible to obtain a substrate-type antenna that exhibits stable frequency characteristics without being affected by the ground pattern while using a small-sized substrate.

  In addition, in addition to the above-described configuration, the present invention is characterized in that the one-side antenna element coupled to the closed-loop coupling type coupling portion pattern is at least two antenna elements.

  According to such a configuration, two antenna elements can be determined at appropriate positions and coupled to the same closed loop coupling type coupling section pattern, respectively, by utilizing the structural characteristics of the closed loop coupling type coupling section pattern. .

  Further, in addition to the above-described configuration, the present invention further includes the back-side coupling pattern having a plurality of the closed-loop independent coupling patterns substantially opposed to the closed-loop coupling pattern, Are connected to different back side antenna elements.

  According to such a configuration, the closed-loop coupling type coupling portion pattern is larger than the closed-loop independent coupling portion pattern because it is formed by integrally coupling a plurality of coupling portion patterns. A plurality of closed-loop independent coupling portion patterns can be easily arranged on the back side of the portion pattern. In this way, it is possible to make effective use of the front and back surfaces of the substrate while making use of the features of the configuration, and to reduce the size of the substrate.

  Further, in addition to the above-described configuration, the present invention further includes an antenna element connected to each of the closed-loop independent coupling patterns, the position of each of the antenna elements connected to the closed-loop coupling type coupling pattern being adjustable. It is characterized by having done.

  According to such a configuration, since the closed-loop coupling type coupling portion pattern is formed by integrally coupling a plurality of coupling portion patterns, the length becomes longer in the coupling direction, but the antenna element is accordingly moved in the coupling direction. It can be combined while moving and adjusting the position.

  Further, in addition to the above-described configuration, the present invention includes the one-side antenna element connected to the closed-loop coupling-type coupling section pattern is two antenna elements, and the back-side coupling pattern includes the closed-loop coupling-type coupling section. Three closed-loop independent coupling patterns that are substantially opposed to a pattern, each of the closed-loop independent coupling patterns being connected to a different one of the back-side antenna elements; The total number of the side antenna elements is 5, one of the resonance frequencies is in the 800 MHz band, the other is in the 900 MHz band, the other is in the 1.5 GHz band, and the other is in the 1.5 GHz band. The resonance frequency is in a 1.9 GHz band, and another resonance frequency is in a 2.1 GHz band.

  According to such a configuration, antennas manufactured by three major mobile phone companies can be standardized in Japan, and design is not performed each time, and a substrate-type antenna with stable performance can be provided. In addition, since it is a substrate type, a standardized pattern portion can be obtained easily and easily.

  Further, in the present invention, in addition to the above-described configuration, the three voids formed in the closed-loop coupling type coupling portion pattern and the respective void portions of each of the closed loop independent coupling portion patterns are respectively opposed to each other. And

  According to such a configuration, when the position of each space is determined, it may be necessary to perform position adjustment on each antenna element side. However, the closed loop coupling type coupling portion pattern integrally includes a plurality of coupling portion patterns. Since the antenna element is formed by coupling, the antenna element is long in the coupling direction, and the antenna element can be moved in the coupling direction by that much and coupled while adjusting the position.

  ADVANTAGE OF THE INVENTION According to the board | substrate type antenna by this invention, further miniaturization can be achieved by the integrated closed-loop coupling | bond-type coupling part pattern, and while using a small board | substrate, a plurality of frequency signals are transmitted and received through one signal line pattern. be able to.

1 is a plan view showing one side surface of a planar antenna according to one embodiment of the present invention. FIG. 2 is a plan view illustrating the other side surface of the planar antenna illustrated in FIG. 1. FIG. 3 is an allocation diagram of frequency bands assigned to each company. It is a frequency characteristic figure of the VSWR value in the conventional board type antenna. FIG. 5 is a frequency characteristic diagram of a VSWR value when a ground condition of the planar antenna illustrated in FIG. 4 is changed. FIG. 3 is a frequency characteristic diagram of a VSWR value when a ground condition of the planar antenna shown in FIGS. 1 and 2 is changed. FIG. 9 is a frequency characteristic diagram of a VSWR value when adjustment is performed. FIG. 11 is a frequency characteristic diagram of a VSWR value when another adjustment is added.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing one side surface of the planar antenna.

  The thin substrate 1 constituting the substrate-type antenna has a square shape of about 20 mm × 78 mm. On one side surface, a closed loop connection type connection portion pattern 2 is formed at a central portion in the longitudinal direction. The closed-loop-coupling-type coupling portion pattern 2 includes a closed-loop pattern 4A having a hollow portion 3A at a substantially central portion, a closed-loop pattern 4B having a hollow portion 3B at a substantially central portion, and a closed-loop pattern 4C having a hollow portion 3C at a substantially central portion. Three are integrally formed while leaving the empty portions 3A to 3C. The closed-loop-coupling-type coupling portion pattern 2 is coupled so that each of the vacant portions 3A to 3C independent in the vertical direction shown in the drawing is present, and has an overall shape of a square or a similar shape.

  The first antenna element 5 and the second antenna element 6 are arranged substantially in parallel at a predetermined distance from each other in the left side region of the closed loop coupling type coupling section pattern 2 in the drawing, and the first antenna element 5 is closed loop coupling. It is connected near the voids 3A, 3B in the mold coupling pattern 2. In addition, the second antenna element 6 is connected to the vicinity of the empty portions 3B and 3C in the closed loop coupling type coupling portion pattern 2.

  The signal line pattern 7 connected to the closed loop coupling type joint pattern 2 and the signal line pattern 7 are disposed in the right side region in the drawing of the closed loop coupling type coupling unit pattern 2 in order to stabilize the potential of the signal line pattern 7. A ground pattern 8 having a ground potential is formed. The ground pattern 8 has a peripheral portion 8A arranged so as to sandwich the signal line pattern 7 extending substantially linearly.

  An earth point 9 is formed on the ground pattern 8, a feeding point 10 is formed on the signal line pattern 7, and a cable (not shown) is connected to the earth point 9 and the feeding point 10.

  FIG. 2 is a plan view showing the other side surface of the planar antenna.

  At the center of the substrate 1 on the back side of the closed-loop coupling type joint pattern 2 shown in FIG. 1, three closed-loop independent coupling portion patterns 11, 12, and 13 are formed in a dispersed manner. A space 11A formed at the center of the closed-loop independent connection pattern 11 is opposed to the space 3A shown in FIG. 1, and a space 12A formed at the center of the closed-loop independent connection pattern 12. Is opposed to the empty space 3B shown in FIG. The void 13A formed at the center of the closed loop independent coupling portion pattern 13 corresponds to the void 3C shown in FIG.

  The third antenna element 14 is connected to the left side region of the closed loop independent coupling pattern 11 in FIG. 2, and the fourth antenna element 15 is connected to the left side region of FIG. 2 of the closed loop independent coupling pattern 12. Have been. Similarly, a fifth antenna element 16 is connected to the left side region of the closed loop independent coupling pattern 13 in FIG.

  The three closed loop independent coupling portion patterns 11 to 13 are located at positions opposed to the closed loop coupling type coupling portion pattern 2 on the back side shown in FIG. Magnetically inductively coupled.

  The first antenna element 5 and the second antenna element 6 shown in FIG. 1 are juxtaposed at a predetermined distance, and the antenna elements 14 to 16 shown in FIG. Are juxtaposed. Each of the antenna elements 14 to 16 is slightly shifted so as not to face the first antenna element 5 and the second antenna element 6 shown in FIG. It is arranged so that the fourth antenna element 15 is located.

  FIG. 3 is a frequency band allocation diagram used in IoT (Internet of Thing) of three major mobile phone companies in Japan.

  At present, the frequency bands used by three major mobile phone companies for IoT in Japan are divided as shown in FIG. In the case of Company D, an 800 MHz band (more specifically, 830 to 845 MHz, 875 to 890 MHz), a 1.5 GHz band (more specifically, 1447.9 to 1462.9 MHz, 1495.9 to 1510.9 MHz) and 2 GHz Three frequency bands of bands (more specifically, 1940 to 1960 MHz and 2130 to 2150 MHz) are used. Company A uses two frequency bands of an 800 MHz band (more specifically, 815 to 830 MHz and 860 to 875 MHz) and a 1575.42 MHz band for position acquisition by GPS. Further, Company S uses two frequency bands of a 900 MHz band (more specifically, 900 to 915 MHz and 945 to 960 MHz) and a 2 GHz band (more specifically, 1960 to 1980 MHz and 2150 to 2170 MHz).

  In the substrate type antenna according to the present embodiment, each of these frequency bands is roughly divided into an 800 MHz band 27, a 900 MHz band 17, a 1.5 GHz band 18, a 1.9 GHz band 19, and a 2.1 GHz band 20. .

  The 800 MHz band 27 is a division including 815 to 830 MHz, 830 to 845 MHz, 860 to 875 MHz, and 875 to 890 MHz described above. The 900 MHz band 17 is a division including the above 900 to 915 MHz and 945 to 960 MHz. The 1.5 GHz band 18 is a division including the above-mentioned 1447.9 to 1462.9 MHz, 1495.9 to 1510.9 MHz, and 1575.42 MHz for GPS. In addition, the 1.9 GHz band 19 is a division including the above-mentioned 1940 to 1960 MHz and 1960 to 1980 MHz. Further, the 2.1 GHz band 20 is divided into 2130 to 2150 MHz and 2150 to 2170 MHz.

  According to these divisions, the first antenna element 5 is manufactured as having a resonance frequency corresponding to the 800 MHz band 27 shown in FIG. 3, and the second antenna element 6 is manufactured in the 900 MHz band 17 shown in FIG. It is manufactured as having a corresponding resonance frequency. The third antenna element 14 is manufactured as having a resonance frequency corresponding to the 2.1 GHz band 20 shown in FIG. 3, and the fourth antenna element 15 is manufactured as a resonance frequency corresponding to the 1.9 GHz band 19 shown in FIG. The fifth antenna element 16 is manufactured as having a resonance frequency corresponding to the 1.5 GHz band 18 shown in FIG.

  In a conventional board-type antenna using two antenna elements having different resonance frequencies, when the length of the cable connected to the ground point and the feeding point is changed to change the ground condition, the VSWR characteristic line shown in FIG. Reference numeral 21 indicates that the resonance frequency changes like the VSWR characteristic line 22 shown in FIG. However, when using the closed-loop coupling type coupling portion pattern 2 and the annular closed-loop independent type coupling portion patterns 11 to 13 arranged opposite thereto as in the above-described substrate type antenna of the present embodiment, FIG. Even if the above-mentioned ground condition is changed like the VSWR characteristic line 23 shown in FIG.

  When the lengths, sizes, shapes, and the like of the antenna elements 5 and 6 and the antenna elements 14 to 16 shown in FIGS. 1 and 2 are changed and adjusted, the VSWR characteristic line 24 shown in FIG. 7 further improves. be able to.

  Further, even if the substrate-type antenna of this embodiment shown in FIGS. 1 and 2 has the VSWR characteristic line 25 shown in FIG. By adjusting the size, shape, or the like of the sheath, the VSWR value can be improved as indicated by the VSWR characteristic line 26.

  As can be understood from these descriptions, according to the substrate-type antenna of the present embodiment, even when there is a change in the ground condition, the improvement of the frequency characteristic and the improvement of the VSWR value can be achieved by the independent antenna elements 5 and 6 and the antenna element 14. １６16 can be easily performed. In this manner, a multi-antenna that can be easily matched in the 800 MHz band, 900 MHz band, 1.5 GHz band, 1.9 GHz band, and 2.1 GHz band can be obtained.

  In the above-described embodiment, as shown in FIGS. 1 and 2, the total of the one-side antenna element and the back-side antenna element is set to five, and the resonance frequency of the first antenna element 5 is 800 MHz band, The resonance frequency of the antenna element 6 is 900 MHz band, the resonance frequency of the third antenna element 14 is 2.1 GHz band, the resonance frequency of the fourth antenna element 15 is 1.9 GHz band, and the resonance frequency of the fifth antenna element 16 is 1.5 GHz. Although the band is used, the present invention is not limited to this.

  The present invention is not limited to the above-described manner of dividing the resonance frequency band. For example, if a substrate-type antenna has already been developed in which the above-described two resonance frequency bands are realized by a single antenna element, this may be used, and four or less antenna elements may be used as a whole. Further, even when the resonance frequency band is divided as described above, the positions of the antenna elements are not limited to the illustrated example, and may be replaced.

  In recent years, with the expansion of the Internet of Things (IoT) market, wireless communication devices have begun to be incorporated into various devices, albeit in small quantities. In addition, mini PCI interface communication modules have been sold by various companies, and there has been an increasing demand for multi-carriers simply by exchanging communication modules. As a result, the required frequency band has been increased from the conventional 2-3 frequency band called multi-band to the 4-5 frequency band.

  When the preferred embodiment of the present invention is applied to such a demand, the five resonance frequency bands can be reduced by using one substrate 1 smaller than the substrate of the conventional substrate-type antenna dealing with three resonance frequency bands. Transmission and reception can be performed from the common signal line pattern 7.

  Further, in the above-described embodiment, an example is described in which a substrate-type antenna is standardized and configured as a substrate-type antenna for three major mobile phone companies in Japan, but the present invention is not limited to this. For example, the present invention can be applied to a board-type antenna that is standardized as a board-type antenna for two specific mobile phone companies, or configured for each company.

  Further, the division of the resonance frequency is not limited to the above, and can be used. If you have a substrate-type antenna for a broadband resonance frequency that has already been developed, for example, if you have obtained the 800 MHz band and the 900 MHz band shown in FIG. , The second antenna element 6 may be omitted.

  Further, the positions of the antenna elements 5, 6, 14, 15, 16 may be changed from the positions shown in FIGS. 1 and 2 to other positions.

  Further, the pattern shown in FIG. 1 is formed on the front side of one substrate 1 and the pattern shown in FIG. 2 is formed on the back side of the substrate 1, but the present invention is not limited to this. For example, the pattern shown in FIG. 1 may be formed on one substrate 1, the pattern shown in FIG. 2 may be formed on another substrate, and these two substrates may be bonded together.

As described above, according to the present invention, the one-side coupling pattern is a closed-loop coupling type coupling section pattern 2 in which a plurality of closed loops each having the voids 3A to 3C are integrally coupled. It is characterized in that it is a plurality of closed-loop independent connection patterns 11 having other vacancies 11A to 13A substantially opposed to the vacancies 3A to 3C of the closed-loop connection type connection pattern 2.

  According to such a configuration, further miniaturization can be achieved by the integrated closed loop coupling type coupling portion pattern 2, and a plurality of frequency signals are transmitted and received through one signal line pattern 7 while using the small substrate 1. can do.

  In addition to the above-described configuration, the present invention further includes one-side antenna elements 5 or 6 coupled to closed-loop coupling type coupling section pattern 2 and back-side antenna elements 14 to 6 coupled to closed-loop independent coupling section patterns 11 to 13. 16 is disposed on the same side of the closed loop coupling type coupling pattern 2 and the closed loop independent coupling pattern 11 to 13, and at a position opposite to the one-side antenna element 5 or 6 in the closed loop coupling type coupling pattern 2. It is characterized in that a ground pattern 8 is arranged.

  According to such a configuration, it is possible to obtain a board-type antenna that exhibits stable frequency characteristics without being affected by the ground pattern 8 while using the small-sized board 1.

  Further, in the present invention, in addition to the above-described configuration, the one-side antenna element coupled to the closed-loop coupling type coupling portion pattern 2 is at least two antenna elements 5 and 6.

  According to such a configuration, the two antenna elements 5, 6 are determined at appropriate positions and coupled to the closed-loop coupling-type coupling section pattern 2 by utilizing the structural characteristics of the closed-loop coupling-type coupling section pattern 2. can do.

  Further, in the present invention, in addition to the above-described configuration, the back side coupling pattern includes a plurality of closed loop independent coupling patterns 11 to 13 substantially opposed to the closed loop coupling type coupling pattern 2, and each closed loop independent coupling pattern. A different back side antenna element 14 to 16 is connected to each of the patterns 11 to 13.

  According to such a configuration, the closed loop coupling type coupling portion pattern 2 is formed by integrally coupling the plurality of coupling portion patterns 4A to 4C, and thus is larger than the closed loop independent coupling portion patterns 11 to 13. However, a plurality of closed-loop independent coupling portion patterns 11 to 13 can be easily arranged on the back surface side of the closed-loop coupling type coupling portion pattern 2. In this way, it is possible to make effective use of the front and back surfaces of the substrate while making use of the features of the configuration, and to reduce the size of the substrate.

  In addition, in addition to the above-described configuration, the present invention provides, for the antenna elements 14 to 16 connected to the closed loop independent coupling patterns 11 to 13, the antenna elements 5 and 6 connected to the closed loop coupling type coupling pattern 2. Is arranged so as to be adjustable.

  According to such a configuration, since the closed-loop coupling type coupling portion pattern 2 is formed by integrally coupling a plurality of coupling portion patterns, the length becomes longer in the coupling direction. Can be moved while moving in the direction of connection to adjust the position.

  Further, in the present invention, in addition to the above-described configuration, the one-side antenna element connected to the closed-loop coupling type coupling portion pattern 2 is two antenna elements 5 and 6, and the back-side coupling pattern is a closed-loop coupling type coupling. And three closed-loop independent coupling part patterns 11 to 13 which are substantially opposed to the individual part pattern 2, and different back side antenna elements 14 to 16 are connected to each of the closed loop independent coupling part patterns 11 to 13, respectively. The total of the antenna on the front side and the antenna on the back side is five, one of which has an 800 MHz band, the other has a 900 MHz band, and the other has a 1.5 GHz band. , And the other one has a 1.9 GHz band, and the other one has a 2.1 GHz band.

  According to such a configuration, antennas manufactured by three major mobile phone companies can be standardized in Japan, and design is not performed each time, and a substrate-type antenna with stable performance can be provided. In addition, since it is a substrate type, a standardized pattern portion can be obtained easily and easily.

  Further, in addition to the above-described configuration, the present invention further includes three vacancies 3A to 3C formed in the closed loop coupling type coupling portion pattern 2 and respective vacancies 11A to 11C formed in each closed loop independent coupling portion pattern 11 to 13. 13A are opposed to each other.

  According to such a configuration, when the position of each cavity is determined, it may be necessary to perform position adjustment on each antenna element side. However, the closed loop coupling type coupling pattern 2 integrates a plurality of coupling patterns. Since the antenna elements 5 and 6 are long in the coupling direction, the antenna elements 5 and 6 can be moved in the coupling direction and coupled while adjusting the position.

DESCRIPTION OF SYMBOLS 1 Substrate 2 Closed loop coupling type coupling part pattern 3A-3C void part 5 First antenna element 6 Second antenna element 11-13 Closed loop independent coupling part pattern 11A-13A void part

Claims (7)

One side of the substrate formed of a dielectric has a one-side coupling pattern and one-side antenna element connected to a transmission / reception pattern on one side, and a back-side coupling pattern capacitively coupled to the coupling pattern on the back side of the substrate; In a substrate type antenna having a back side antenna element,
The one-side coupling pattern is a closed-loop coupling-type coupling pattern obtained by integrally coupling a plurality of closed loops each having a void, and the back-side coupling pattern is formed in the void of the closed-loop coupling-type coupling pattern. A substrate-type antenna comprising a plurality of closed-loop independent coupling portion patterns each having another space portion substantially opposed thereto.   The one-side antenna element connected to the closed-loop coupling type coupling pattern, and the back-side antenna element connected to the closed-loop independent coupling pattern, the closed-loop coupling type coupling pattern and the closed-loop independent coupling pattern 2. The substrate-type antenna according to claim 1, wherein a ground pattern is arranged on a same side of the closed-loop-coupling-type coupling portion pattern as a position opposite to the one-side antenna element. 3.   The substrate-type antenna according to claim 1, wherein the one-side antenna element coupled to the closed-loop coupling type coupling portion pattern is at least two antenna elements.   The back side coupling pattern has a plurality of the closed loop independent coupling section patterns substantially opposed to the closed loop coupling type coupling section pattern, and the different back side antenna elements are respectively connected to the respective closed loop independent coupling section patterns. The board-type antenna according to claim 1, wherein:   The position of each said antenna element connected to the said closed-loop coupling | bond-type coupling part pattern was arrange | positioned so that adjustment was possible with respect to each antenna element connected to each said closed-loop independent coupling-part pattern. Board type antenna.   The one-side antenna element connected to the closed-loop coupling-type coupling pattern is two antenna elements, and the back-side coupling pattern is independent of the three closed-loop coupling-type coupling patterns substantially facing the closed-loop coupling-type coupling pattern. A mold coupling portion pattern, each of the closed-loop independent type coupling portion patterns is connected to a different one of the back-side antenna elements, and each of the one-side antenna elements and the back-side antenna element has a total of five, and Is a 800 MHz band, the other one is a 900 MHz band, the other one is a 1.5 GHz band, the other one is a 1.9 GHz band, and the other one is a 1.9 GHz band. The substrate type antenna according to claim 1, wherein the resonance frequency of the book is in a 2.1 GHz band. 6. The substrate-type antenna according to claim 5, wherein the three voids formed in the closed-loop coupling pattern are opposed to the voids of the closed-loop independent coupling pattern. .