JP2005130532A - Bi-resonant dielectric antenna and on-vehicle radio device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna for use mainly in a radio device for mobile communication in microwave and millimeter wave bands. <P>SOLUTION: One side of a ground conductor 3 is used as a ground plane 36, and a first power feeding line 33 for feeding power to a first element 1 and a second power feeding line 34 for feeding power to a second element 2 are formed on the other side. The first power feeding line 33 of the ground conductor 3 and a first antenna electrode 10 are electrically connected by a first power feeding pin 13 inserted into a through hole 24 provided in the center of an antenna electrode 20, for example, in the second element 2, a through hole provided in a power feeding point 11 of the first element 1 and a through hole 30 provided on the ground conductor 3. The second power feeding line 34 of the ground conductor 3 and a second antenna electrode 20 are electrically connected by a second power feeding pin 23 inserted into a through hole provided in a second power feeding point 21 and a through hole 31 provided on the ground conductor 3, thereby reducing interactions between the first antenna electrode 10 and the second antenna electrode 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-resonance dielectric antenna and an in-vehicle wireless device corresponding to a wireless device mounted on a car among antennas mainly used for mobile communication wireless devices in the microwave and millimeter wave bands. .

  As a conventional antenna for mobile communication devices, a dual-frequency microstrip antenna described in Japanese Patent Laid-Open No. 7-249933 is known.

  The configuration of a conventional antenna will be described below with reference to the drawings. In FIG. 25, 101 and 102 are radiation conductors, 103 are notches, 104, 105 and 106 are dielectric substrates, 107 are ground conductors, 108 are rectangular slots, 109 are circular tube slots, 110 and 111 are microstrip lines, Reference numeral 112 denotes a hybrid circuit.

  The operation of the above configuration will be described below. A radiation signal 101 having a notch 103 on a dielectric substrate 104 is electromagnetically coupled to a radiation conductor 101 having a first frequency band from a microstrip line 113 formed on the dielectric substrate 106 via a circular tube slot 109 and radiated. The conductor 101 is fed with power and excited to emit circularly polarized electromagnetic waves in the first frequency band. The electromagnetic wave that arrives in the second frequency band excites the radiation conductor 102 formed on the dielectric substrate 105 and is coupled to the microstrip lines 110 and 111 via two rectangular slots.

Since the microstrip lines 110 and 111 are provided at positions that are 90 ° apart from each other in phase, they efficiently receive circularly polarized electromagnetic waves and pass through a hybrid circuit 112 between a high-frequency transmission / reception unit (not shown) and a high-frequency signal. Transmission and reception are possible.
JP-A-7-249933

  Although the above-mentioned conventional antennas can realize circularly polarized antennas with different transmission / reception frequency bands, they do not support the required frequency band, polarization type, or directivity according to the radio service to be transmitted / received. .

  A multi-resonance dielectric antenna according to the present invention includes a first element in which a first antenna electrode for transmitting, receiving, or transmitting / receiving electromagnetic waves in a first frequency band is formed on a first dielectric block, and a first frequency A second element in which a second antenna electrode for transmitting, receiving, or transmitting / receiving electromagnetic waves in a second frequency band lower than the band is formed on the second dielectric block is laminated below the first element. In the antenna installed on the conductor, one side of the ground conductor is used as a ground plane, and a first feed line that feeds power to the first element and a second feed line that feeds power to the second element are formed on the other side, The first conductor feed pin inserted into the through hole provided in the center of the antenna electrode of the two elements, the through hole provided in the feed point of the first element, and the through hole provided in the ground conductor, The first feed line and the first antenna electrode The second feed line of the ground conductor and the second antenna are connected by a second feed pin inserted in a through hole provided in the feed point of the second element and a through hole provided in the ground conductor. By providing a through-hole into which the electrode is electrically connected and the first feeding pin provided in the second element is inserted at a position where the electric flux is low when the antenna of the second element is operated, It is possible to realize a small multi-resonance dielectric antenna in which the influence of the interaction between the antenna electrode and the second antenna electrode is reduced.

  In addition, it is possible to deal with circularly polarized waves by providing a degenerate separation element for each antenna electrode.

  In addition, the first and second dielectric blocks are composed of two types of dielectric blocks having different relative dielectric constants, and the cross-sectional shape of each dielectric block is changed so that the orientation corresponding to the required specifications is achieved. A small multi-resonance dielectric antenna whose characteristics can be controlled can be realized.

  As described above, according to the configuration of the present invention, it is possible to realize a small multi-resonance dielectric antenna in which the influence of the interaction between the first antenna electrode and the second antenna electrode is reduced.

  In addition, each antenna electrode is provided with a degenerative separation element according to the target radio service, so that it can cope with circular polarization, and the first and second dielectric blocks have different ratios between the antenna electrode portion and the other portions. A compact multi-resonant dielectric antenna with controlled directivity can be realized by configuring with two dielectric blocks having a dielectric constant and adjusting the cross-sectional shape of each dielectric block.

  The first invention of the present application is a first element in which a first antenna electrode is formed on a first dielectric block, and a second element that transmits, receives, or transmits / receives electromagnetic waves in a frequency band lower than that of the first antenna electrode. And an antenna having a second dielectric layer formed on a ground conductor, the second element being laminated on a lower portion of the first element, A first feed line that feeds power to the first element and a second feed line that feeds power to the second element are formed on one side of the ground plane, and a through hole provided in the second element and the first Electrically connecting the first feed line of the ground conductor and the first antenna electrode by a first feed pin inserted into a through hole provided in the feed point of the element and a through hole provided in the ground conductor; A through hole provided in the feed point of the second element and a through provided in the ground conductor A through hole provided in the second element through which the first feed pin passes, and the first feed line of the ground conductor and the second antenna electrode are electrically connected by a second feed pin inserted into the rail. The hole is arranged at a position where the electric flux is small when the antenna of the second element is operated, and is composed of a dielectric block. A plurality of feeding points according to feeding positions of the antenna electrodes, and the feeding points A frequency separation element having a pass characteristic according to the resonance frequency of each antenna electrode connected is patterned on the surface of the dielectric block, and a feed end is formed by coupling the plurality of frequency separation elements at a single point. A multi-resonance dielectric antenna including a connection portion inserted and fixed in a laminated manner between the ground conductor and a small multi-resonance dielectric antenna with a single port at the antenna end. 1st ante The electrode and compact double-resonance type dielectric antenna with a reduced influence of the interaction between the second antenna electrode can be realized.

  The second invention of the present application is provided with a first feed line for providing two types of antenna electrodes in a ring shape on the surface of a dielectric block, using one side of the ground conductor as a ground plane, and feeding power to the first antenna electrode on the other side. Forming a second feed line that feeds power to the second antenna electrode, and a feed pin inserted into a through hole provided at a feed point of each antenna electrode, and an antenna unit electrically connected to each feed line; The dielectric block includes a plurality of feeding points according to the feeding position of each antenna electrode, and a frequency separation element connected to each feeding point and having a pass characteristic according to the resonance frequency of each antenna electrode. A multi-resonance type including a connection formed by forming a pattern on the surface of the body block, providing a feeding end obtained by coupling the plurality of frequency separation elements at a single point, and inserting and fixing the antenna unit and a ground conductor in a stacked manner Dielectric An Is obtained by the Na, can be realized compact double-resonance type dielectric antenna in which one port of the antenna ends.

  The third invention of the present application is a compact multi-resonant dielectric in which the outer shape of the connection portion is the same as the antenna portion in the configuration described in the invention of the first or second application of the present application, and the overall shape is a rectangular parallelepiped shape. An antenna can be realized.

  A fourth invention of the present application is the dielectric ceramic according to any one of the first to third inventions of the present application, wherein the dielectric block is made of a dielectric ceramic and has a low temperature dependency such as a relative dielectric constant. This makes it possible to realize a small multi-resonance dielectric antenna with little characteristic fluctuation even in a severe temperature environment such as an in-vehicle environment.

  A fifth invention of the present application includes a multi-resonance dielectric antenna according to any one of the first to fourth inventions, a high-frequency transmission / reception unit connected to the multi-resonance dielectric antenna, and the high-frequency transmission / reception unit. A signal processing unit connected to perform baseband signal processing; an operation control unit connected to the high-frequency transmission / reception unit and the signal processing unit; a display unit; and an operation unit. A local signal source for changing the frequency, a transmission means for converting the modulation signal output from the signal processing unit into a high frequency band by a mixer according to the output of the local signal source, and outputting it to the multi-resonant dielectric antenna, and a multi-resonant dielectric Receiving means for converting the incoming radio wave received by the body antenna into a specific intermediate frequency band according to the output of the local signal source by the mixer, and the operation control unit includes: According to the force, means for changing the output frequency band of the local signal source of the high-frequency transmitting and receiving unit, and the processing method of the signal processing unit, the signal processing unit is configured by hardware such as a digital signal processor or CPU, From the digital signal that has an analog-digital converter and digitally converts the output of the high-frequency transmission / reception unit, and has a digital-analog converter to convert the modulation signal, which is an output signal, to analog and output it to the high-frequency transmission / reception unit It has baseband signal processing means, and has means for changing these means by software switching according to instructions from the operation control section, thereby changing the modulation or demodulation function of the signal processing section in accordance with a plurality of communication systems. Therefore, an in-vehicle wireless device that can enjoy a plurality of services with a single device can be realized.

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

(Embodiment 1)
FIG. 1 is a perspective view of a multi-resonant dielectric antenna according to Embodiment 1 of the present invention. In FIG. 1, 1 is a first element, 2 is a second element, 3 is a ground conductor on which a multi-resonant dielectric antenna is disposed, and 10 is a first element formed of a metal layer on the surface of the first element 1. The antenna electrode 13 is a first feeding pin for feeding a high frequency signal to the first antenna electrode 10. The multi-resonant dielectric antenna is formed by joining the first element 1 and the second element 2 and has radiation directivity characteristics, input impedance characteristics, and polarization characteristics depending on the size of the ground conductor 3. Have.

  FIG. 2 is an exploded view for explaining the structure of the multi-resonance dielectric antenna of FIG. 1, and FIG. 3 is a diagram showing the configuration of the back surface of the ground conductor 3. 2 and 3, reference numeral 12 denotes a first dielectric block which is a base material of the first element 1, and 11 denotes a first feeding point formed at a predetermined position of the first dielectric block 12. Specifically, a through hole is provided at the position of the first feeding point 11 of the first dielectric block 12, and the first feeding pin 13 is inserted and electrically connected to the first antenna electrode 10 as will be described later. Thus, the first feeding point 11 is configured. In addition, a ground surface 36 that is electrically grounded is formed on the surface of the ground conductor 3.

  22 is a second dielectric block which is a base material of the second element 2, 20 is a second antenna electrode formed on the surface of the second dielectric block 22, 24 is a through-hole, and 21 is a second power feed. In this respect, like the first feeding point 11, the second feeding electrode 23 is electrically connected to the second antenna electrode 20 in the same manner.

  As shown by the dotted line in FIG. 2, the first power supply pin 13 is connected to the first power supply point 11, the through hole 24, and the through hole 30 formed in the ground conductor 3. It is connected to the line 32 and is connected to a high frequency transmitter / receiver (not shown) from the first power supply terminal 33 to transmit or receive a desired electromagnetic wave.

  Similarly, the second power feed pin 23 is electrically connected to the second power feed line 34 via the second power feed point 21 and the through hole 31 and is connected to a high-frequency transmitting / receiving unit (not shown). Send or receive. The first power feed pin 13 is electrically separated from the second antenna electrode 20 by the through hole 24.

  The operation of the above configuration will be described below. The first dielectric block 12 and the second dielectric block 22 are configured in a plate shape with a dielectric material having the same relative dielectric constant. A transmission signal in a frequency band in which the first antenna electrode 10 has a half wavelength is transmitted from a high-frequency transmission / reception unit (not shown) connected to the first power supply terminal 33 to the first power supply line 32 and the first power supply pin 13. Is transmitted to the first feeding point 11 to excite the first antenna electrode 10 and operate as a transmitting antenna.

  On the other hand, the first antenna electrode 10 is excited by an incoming radio wave having a frequency at which the first antenna electrode 10 has a substantially half wavelength, travels through the first feeding point 11, and passes from the first feeding pin 13 to the first feeding line 32. It operates as a receiving antenna.

  Similarly, a frequency band corresponding to the shape of the second antenna electrode 22 is formed by the second antenna electrode 22 formed on the second dielectric block 22, the second feed pin 23, and the second feed line 34. Operates as a transmitting and receiving antenna.

  The position of the through hole 24 formed in the second dielectric block 22 through which the first power feed pin 13 passes is a position where no current is generated when the second element 2 operates as a transmission / reception antenna, more specifically, the end. It is provided at a site of 20% or less from the electric flux of the part.

  For example, it is provided at the center of the second antenna electrode 20. By providing the through hole 24 at such a position, the electromagnetic coupling state between the second element 2 and the first power supply pin 13 can be reduced, and the mutual relationship between the first element 1 and the second element 2 can be reduced. It is possible to reduce the deterioration of the antenna characteristics due to the action.

  By providing the first feeding point 11 at an optimal position with respect to the first antenna electrode 10, the first element 1 operates as an antenna. Specifically, the first feeding point 11 is provided at a position slightly away from the center of the first antenna electrode 10.

  When the frequency band of electromagnetic waves transmitted and received by the first element 1 is f1, and the frequency band transmitted and received by the second element 2 is f2, f1 is set to be higher than f2. Since the shapes of the first antenna electrode 10 and the second antenna electrode 20 are determined by the relative permittivity of the dielectric blocks 12 and 22 and the set frequency band, the shape of the first antenna electrode 10 is the second antenna electrode. It can be made smaller than 20.

  Accordingly, since the area of the first antenna electrode 10 is smaller than the area of the first dielectric block 12, the first power supply pin 13 disposed at the center of the first dielectric block 12 has the first The positional relationship of the antenna electrode 10 can be easily adjusted, and the first feeding point 11 can be set at an optimal position for operating the first element 1 as an antenna without increasing the overall shape.

  The first dielectric block 12 and the second dielectric block 22 have been described as having the same relative dielectric constant. However, the relative dielectric constant of the first dielectric block 12 is εr1, and the second dielectric block 22 When the relative dielectric constant is εr2, the configuration may be such that εr2> εr1.

  For example, when the first element 1 corresponds to an electromagnetic wave in the 5.8 GHz band and the second element 2 corresponds to an electromagnetic wave in the 1.5 GHz band, the first dielectric block 12 and the second dielectric block 22 are the same. When configured with a relative dielectric constant, the shape of the second antenna electrode 20 becomes larger depending on the wavelength order than the first antenna electrode 10, and as a result, the overall shape becomes larger. By making εr2 larger than εr1, the second antenna electrode 20 can be made smaller, and as a result, the overall shape can be made smaller.

  In addition, by configuring the material of the first dielectric block 12 and the second dielectric block 22 with dielectric ceramic having a good temperature characteristic, it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna. .

  In addition, although it connected with the 2nd feed line 34 via the 2nd feed pin 23 as the feed to the 2nd antenna electrode 20, the 2nd feed pin 23 is lost and the through hole 31 is used as a slot. The second feeding line 34 and the second antenna electrode 20 may be coupled by a feeding method. Alternatively, the second feed line 34 may be formed on the ground layer 36 surface side of the ground conductor 3 and electromagnetically coupled to the second antenna electrode 20.

(Embodiment 2)
FIG. 4 is a perspective view of a multi-resonant dielectric antenna according to Embodiment 2 of the present invention. In FIG. 4, reference numeral 25 denotes a degenerative separation element provided on the second antenna electrode 20, in which two opposite corner electrodes of the second antenna electrode 20 are cut out in a predetermined shape. Other configurations are the same as those of the first embodiment described with reference to FIG.

  The operation of the above configuration will be described below. For example, when a GPS service and a VICS service are enjoyed by an in-vehicle wireless device mounted on a car, an electromagnetic wave having a circularly polarized wave in the 1.5 GHz band in GPS and a linearly polarized wave component in the 2.5 GHz band in VICS. Need to receive. When the antenna electrode shape corresponding to the 1.5 GHz band as f2 and the 2.5 GHz band as f1 is formed, the second element 2 has the degenerate separation element 25 formed in the second antenna electrode 20, and thus the circular polarization It is possible to efficiently receive the electromagnetic wave having the waveform type frequency f2.

  On the other hand, since the first element 1 is not provided with the degenerate separation element 25 in the first antenna electrode 10, it can efficiently receive the electromagnetic wave having the frequency f1 in the linearly polarized wave form, and is efficient for a plurality of services as described above. It is possible to respond well.

  In addition, although the structure which provided the degeneracy separation element 25 in the 2nd antenna electrode 20 was demonstrated, according to the polarization characteristic in two types of frequency bands transmitted / received, the 1st antenna electrode 10 or the 2nd antenna electrode 20 or both.

  For example, the first device 1 may receive a 5.8 GHz band circularly polarized automatic toll collection service and the second device may receive the 2.5 GHz band linearly polarized VICS service. In FIG. 4, a rectangular patch antenna element is described as the antenna electrode, but a circular patch antenna element may be used.

  In addition, by configuring the material of the first dielectric block 12 and the second dielectric block 22 with dielectric ceramic having a good temperature characteristic, it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna. .

  With the above configuration, it is possible to configure a multi-resonant dielectric antenna that supports two types of frequency bands, and to realize a compact multi-resonant dielectric antenna that supports the desired polarization characteristics. It becomes.

  In addition, although it connected with the 2nd feed line 34 via the 2nd feed pin 23 as the feed to the 2nd antenna electrode 20, the 2nd feed pin 23 is lost and the through hole 31 is used as a slot. The second feeding line 34 and the second antenna electrode 20 may be coupled by a feeding method. Alternatively, the second feed line 34 may be formed on the ground layer 36 surface side of the ground conductor 3 and electromagnetically coupled to the second antenna electrode 20.

(Embodiment 3)
FIG. 5 is a cross-sectional view of a multi-resonant dielectric antenna according to Embodiment 3 of the present invention. 5 differs from the configuration of FIGS. 1 to 3 described in Embodiment 1 or the configuration of FIG. 4 described in Embodiment 2 in that the first element 1 and the second element 2 are different from each other. The perspective view is, for example, the shape shown in FIG.

  In FIG. 5, reference numeral 41 denotes an annular dielectric block A, and 42 denotes a dielectric block having a trapezoidal cross section in which the first antenna electrode 10 or the second antenna electrode 20 is formed on the surface thereof and fitting to the dielectric block A41. B. The dielectric block A41 and the dielectric block B42 are made of materials having different relative dielectric constants. The size of the dielectric block B42 is made larger than the shape of the antenna electrode formed on the surface.

  The operation of the above configuration will be described below. Directivity characteristics of electromagnetic waves radiated or received from the first antenna electrode 10 or the second antenna electrode 20 vary depending on the shapes of the antenna electrode and the dielectric block, their positional relationship, and the ground conductor 3.

  That is, the directivity depends on the direction of the electric field vector between the antenna electrode and the ground conductor 3, and this electric field vector changes depending on the shape and positional relationship between the antenna electrode and the dielectric block, so that the desired directivity can be obtained. For this purpose, these shapes and positional relationships may be controlled.

  FIG. 6 is a diagram schematically showing changes in the electric field vector depending on the shapes of the dielectric block A41 and the dielectric block B42 in the vicinity of the first element 1. FIG. In FIG. 6, 43 is the electric field vector, 44 is the directivity characteristic in the uniform dielectric block as shown in the first embodiment, and 45 is the directivity characteristic by the dielectric block A41 and the dielectric block B42.

  The direction of the electric field vector 43 between the first antenna electrode 10 and the ground conductor 3 changes at the boundary surface depending on the shapes of the dielectric block A41 and the dielectric block B42 and the relative dielectric constant. FIG. 6 shows a case where the relative permittivity of the dielectric block A41 is larger than that of the dielectric block B42, but the direction of the electric field vector 43 is changed in accordance with the incident angle to the boundary surface.

  Due to the change of the electric field vector 43, the radiation directivity of the first antenna electrode 10 changes from the directivity characteristic 44 to the directivity characteristic 45, and as a result, an antenna having a predetermined directivity characteristic can be obtained.

  Similarly, the electric field vector generated from the second antenna electrode 20 is also refracted at the boundary between the dielectric block A41 and the dielectric block B42 in accordance with the relative permittivity and the shape and direction of the boundary surface. Changes. That is, the directivity characteristics of the first antenna electrode 10 and the second antenna electrode 20 can be controlled by the relative permittivity and shape of the dielectric block A41 and the dielectric block B42.

  For example, when enjoying a 2.5 GHz band VICS service and a 5.8 GHz band automatic toll collection service with an in-vehicle wireless device mounted in a car, the automatic toll collection service particularly adopts a narrow area communication system. In addition, a directivity in which the gain in the direction of ± 90 degrees with respect to the zenith direction is reduced by several dB or more is required. On the other hand, the VICS service, on the other hand, requires a characteristic that suppresses the drop in the gain in the horizontal plane with respect to the gain in the zenith direction to some extent.

  The first antenna electrode 10 has an electrode shape corresponding to the 5.8 GHz band and the second antenna electrode 20 corresponds to the 2.5 GHz band. The relative permittivity and shape of the dielectric block A41 and the dielectric block B42 are By optimizing each of the first element 1 and the second element 2, the directivity transmitted / received by the first antenna electrode 10 is changed to the directivity required by the narrow area communication system, and the second antenna electrode is set to the VICS service. It becomes possible to correspond to.

  It should be noted that the material of the dielectric block A41 and the dielectric block B42 is made of a dielectric ceramic having a good temperature characteristic, so that it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna.

  In addition, although it connected with the 2nd feed line 34 via the 2nd feed pin 23 as the feed to the 2nd antenna electrode 20, the 2nd feed pin 23 is lost and the through hole 31 is used as a slot. The second feeding line 34 and the second antenna electrode 20 may be coupled by a feeding method. Alternatively, the second feed line 34 may be formed on the ground layer 36 surface side of the ground conductor 3 and electromagnetically coupled to the second antenna electrode 20.

  With the above configuration, it is possible to realize a multi-resonant dielectric antenna with controlled directivity by changing the relative permittivity and shape of the two dielectric blocks.

(Embodiment 4)
FIG. 7 is a cross-sectional view of a multi-resonant dielectric antenna according to Embodiment 4 of the present invention. In FIG. 7, reference numeral 60 denotes a central conductor formed by the first feed pin 13 that passes through the first through hole 14 of the first dielectric block 12, and passes through the second through hole 241 of the second dielectric block 22. The coaxial tube and the ground conductor 3 are constituted by a three-layer structure of a first substrate 61, a space layer 63, and a second substrate 62, 361 is a first ground layer provided on the surface of the first substrate, 64 Is a second ground layer provided on the surface of the second substrate 62 and electrically connected to the outer conductor 72 of the coaxial tube 60, and 32 is provided on the back surface of the second substrate 62 and is connected to the first power feed pin 13. A first feed line electrically connected, 34 is a second feed line provided on the back surface of the first substrate 61 and electrically connected to the outer conductor 72, and 65 is a coaxial line of the second feed line 34. A first separation element 15 provided near the tube 60, 15 is a bottom of the second dielectric block 22 A ground electrode provided.

  The first separation element 65 is configured by a tubular structure having a height of 1/4 of the wavelength with respect to the frequency band f2 transmitted and received by the second element 2, so that the outer surface of the outer conductor 72 is formed. Transmission of the transmitted high-frequency signal having the frequency f2 to the first feed line 32 and the second ground layer 64 can be restricted.

  The operation of the above configuration will be described below. The transmission signal in the frequency band f1 in which the first antenna electrode 10 has about half wavelength excites the first antenna electrode 10 via the first feed line 32 and the first feed pin 13, and operates as a transmission antenna. .

  On the other hand, the first antenna electrode 10 is excited by an incoming radio wave having a frequency that is approximately half a wavelength, and is output from the first feed pin 13 to the first feed line 32, thereby receiving the first antenna electrode 10. Operates as an antenna. The first element 1 operates as an antenna with the second antenna electrode 20 as a ground reference.

  Further, the transmission signal in the frequency band f2 in which the second antenna electrode 20 has about a half wavelength excites the second antenna electrode 20 via the second feed line 34 and the outer conductor 72, and operates as a transmission antenna. On the other hand, the second antenna electrode 20 is excited by an incoming radio wave having a frequency of approximately half a wavelength, and is output from the outer conductor 72 to the second feed line 34, thereby operating as a receiving antenna. To do. The second element 2 operates as an antenna with the ground electrode 15 as a ground reference.

  Further, the output of the signal in the frequency band f2 to the first feed line 32 is greatly attenuated by the first separation element 65, the influence of the first feed line 32 on the second antenna electrode is reduced, and the operation Is stable.

  It should be noted that the material of the first dielectric block 12 and the second dielectric block 22 is made of a dielectric ceramic having a good temperature characteristic, so that it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna. .

  With the above configuration, the first antenna electrode 10 can be operated as an antenna with the second antenna electrode 20 as a ground reference for a high-frequency signal, and the second antenna electrode can be operated with a ground electrode 15 as a ground reference. It is possible to improve the antenna characteristics by preventing the high-frequency signal affected by one separation element 65 from being transmitted to the second ground plane 64 and the first feed line 32.

(Embodiment 5)
FIG. 8 is a cross-sectional view of the multi-resonant dielectric antenna according to the fifth embodiment of the present invention, and FIG. 9 is a pattern diagram of the first to third metal layers of the ground conductor 3. In FIG. 8, the ground conductor 3 is composed of a three-layer substrate including a first metal layer 74, a first substrate 61, a second metal layer 75, a second substrate 62, and a third metal layer 76. Reference numeral 32 denotes a first feed line provided on the third metal layer 76 and electrically connected to the feed pin 13. Reference numeral 34 denotes a third feed line from the outer conductor 72 through the second metal layer 75 line and the through hole 79. A second feeder line electrically connected to the line of the metal layer 76, 65 is a first separation element made of a quarter-wave fan-shaped tip short-circuited stub provided in the first metal layer 75, Reference numeral 15 denotes a ground electrode provided at the bottom of the second dielectric block 22.

  The first separation element 65 is composed of a 1/4 wavelength tip short-circuited stub with respect to the frequency band f2 transmitted and received by the second element 2, so that the high frequency of the frequency f2 transmitted through the outer surface of the outer conductor 72 is obtained. Transmission of the signal to the first feeder line 32 can be restricted.

  The operation of the above configuration will be described below. The transmission signal in the frequency band f1 in which the first antenna electrode 10 has about half wavelength excites the first antenna electrode 10 via the first feed line 32 and the first feed pin 13, and operates as a transmission antenna. .

  On the other hand, the first antenna electrode 10 is excited by an incoming radio wave having a frequency that is approximately half a wavelength, and is output from the first feed pin 13 to the first feed line 32, thereby receiving the first antenna electrode 10. Operates as an antenna. The first element 1 operates as an antenna using the second antenna electrode 20 as a ground plane.

  The transmission signal in the frequency band f2 in which the second antenna electrode 20 has about half wavelength excites the second antenna electrode 20 via the second feed line 34 and the outer conductor 72, and operates as a transmission antenna.

  On the other hand, the second antenna electrode 20 is excited by an incoming radio wave having a frequency of approximately half a wavelength, and is output from the outer conductor 72 to the second feed line 34, thereby operating as a receiving antenna. To do. The second element 2 operates as an antenna using the ground electrode 15 as a ground plane.

  Further, the output of the signal in the frequency band f2 to the first feed line 32 is greatly attenuated by the first separation element 65, the influence of the first feed line 32 on the second antenna electrode is reduced, and the operation Is stable.

  It should be noted that the material of the first dielectric block 12 and the second dielectric block 22 is made of a dielectric ceramic having a good temperature characteristic, so that it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna. .

  With the above configuration, the first antenna electrode 10 can be operated as an antenna with the second antenna electrode 20 as a ground reference for a high-frequency signal, and the second antenna electrode can be operated with a ground electrode 15 as a ground reference. By constructing one separation element 65, the first transmission line, and the second transmission line on a multilayer substrate, it is possible to realize a double resonance type dielectric antenna having an inexpensive structure.

(Embodiment 6)
FIG. 10 is a sectional view of a multi-resonant dielectric antenna according to the sixth embodiment of the present invention. In FIG. 10, reference numeral 601 denotes a central conductor formed by the first power feed pin 13 that passes through the first through hole 14 of the first dielectric block 12, and the second through hole 241 of the second dielectric block 22 and the second through hole 241. The double coaxial tube passing through the third through hole 28 of the third dielectric block 27, the ground conductor 3, includes the first substrate 61, the first space layer 63, the second substrate 62, and the second space layer 67. And a third substrate 68, 361 is a first ground layer provided on the surface of the first substrate, 64 is provided on the surface of the second substrate 62, and the double coaxial tube 601 is provided. The second ground layer 69, which is electrically connected to the first outer conductor 72, is provided on the surface of the third substrate 68 and is electrically connected to the second outer conductor 73 of the double coaxial tube 601. The third ground layer 32 is provided on the back surface of the third substrate 68 and is electrically connected to the feed pin 13. The first feed line 34 is provided on the back surface of the second substrate 62 and is electrically connected to the second outer conductor 73, and 37 is provided on the back surface of the first substrate 61. A third feed line electrically connected to the first outer conductor 72, 65 is a first separation element provided in the vicinity of the double coaxial pipe 601 of the third feed line 37, and 66 is a second feed line A second separation element 15 provided in the vicinity of the double coaxial tube 601 of the feed line 34, 15 is a ground electrode provided at the bottom of the third dielectric block 27.

  Reference numeral 6 denotes a third element composed of a third antenna electrode 26 and a third dielectric block 27, similarly to the first element 1 and the second element 2.

  The first separation element 65 is configured by a tubular structure having a height of ¼ wavelength with respect to the frequency band f3 transmitted and received by the third element 6, so that the first separation element 65 is arranged outside the first outer conductor 72. Transmission of the high-frequency signal having the frequency f3 transmitted through the surface to the second feed line 34 and the second ground layer 64 can be limited.

  The second separation element 66 is configured by a tubular structure having a height of ¼ wavelength with respect to the frequency band f2 transmitted and received by the second element 2, so that the second separation element 66 is formed on the outer side of the second outer conductor 73. The transmission of the high-frequency signal having the frequency f2 transmitted through the surface to the first feed line 32 and the third ground layer 64 can be restricted.

  The operation of the above configuration will be described below. The transmission signal in the frequency band f1 in which the first antenna electrode 10 has about half wavelength excites the first antenna electrode 10 via the first feed line 32 and the first feed pin 13, and operates as a transmission antenna. .

  On the other hand, the first antenna electrode 10 is excited by an incoming radio wave having a frequency that is approximately half a wavelength, and is output from the first feed pin 13 to the first feed line 32, thereby receiving the first antenna electrode 10. Operates as an antenna. The first element 1 operates as an antenna using the second antenna electrode 20 as a ground plane.

  Further, the transmission signal in the frequency band f2 in which the second antenna electrode 20 has about a half wavelength excites the second antenna electrode 20 via the second feeder line 34 and the second outer conductor 73, and serves as a transmission antenna. Operate.

  On the other hand, the second antenna electrode 20 is excited by an incoming radio wave having a frequency at which the second antenna electrode 20 has a substantially half wavelength, and is output from the second outer conductor 73 to the second feed line 34, thereby receiving the signal. Operates as an antenna. The second element 2 operates as an antenna using the third antenna electrode 26 as a ground plane.

  Further, the output of the signal in the frequency band f2 to the first feeding line 32 is greatly attenuated by the first separation element 65, and the influence of the first feeding line 32 on the second antenna electrode 20 is reduced. Operation is stable.

  Similarly, the transmission signal in the frequency band f3 in which the third antenna electrode 26 has about a half wavelength excites the third antenna electrode 26 via the third feeder line 37 and the first outer conductor 72, thereby transmitting the transmission antenna. Works as.

  On the other hand, the third antenna electrode 26 is excited by an incoming radio wave having a frequency of approximately half a wavelength, and is output from the first outer conductor 72 to the third feed line 37, thereby receiving the signal. Operates as an antenna. The third element 6 operates as an antenna using the ground electrode 15 as a ground plane.

  In addition, the output of the signal in the frequency band f3 to the second feed line 34 is greatly attenuated by the second separation element 66, and the influence of the second feed line 34 on the third antenna electrode 26 is reduced. Operation is stable.

  With the above configuration, the first antenna electrode 10 has the second antenna electrode 20 as the ground reference for the high-frequency signal, and the second antenna electrode 20 has the third antenna electrode 26 as the ground reference for the high-frequency signal. The antenna electrode 26 can be operated as an antenna with the ground electrode 15 as a ground reference, and a high-frequency signal influenced by the first separation element 65 and the second separation element 66 is transmitted to the second ground layer 64, the third It is possible to prevent transmission to the ground layer 69, the second feed line 34, and the third feed line, thereby improving the antenna characteristics.

(Embodiment 7)
FIG. 11 is a cross-sectional view of the multi-resonant dielectric antenna according to the seventh embodiment of the present invention, and FIG. 12 is a pattern diagram of the first to fourth metal layers of the ground conductor 3. 11, the ground conductor 3 includes a first metal layer 74, a first substrate 61, a second metal layer 75, a second substrate 62, a third metal layer 76, a third substrate 68, and a fourth substrate. The metal layer 77 is a multilayer substrate, 32 is a first feed line provided on the third metal layer 76 and electrically connected to the first feed pin 13, and 34 is from the second outer conductor 73. The second feed line 37 electrically connected to the line of the fourth metal layer 77 through the line of the third metal layer 76 and the through hole 87, 37 is the second metal from the first outer conductor 72 The third feed line 65 electrically connected to the line of the fourth metal layer 77 through the line of the layer 75 and the through hole 78, is a quarter wavelength of 65 provided in the second metal layer 75. A first separation element composed of a fan-shaped tip short-circuited stub, 66 is a quarter-wave fan-shaped tip provided on the third metal layer 76 Second separating element comprising a short stub, 15 is a ground electrode provided on the bottom of the third dielectric block 27.

  The first separation element 65 is composed of a 1/4 wavelength tip short-circuited stub for the frequency band f3 transmitted and received by the third element 6, so that the frequency transmitted through the outer surface of the first outer conductor 72 is reduced. Transmission of the high-frequency signal of f3 to the second feed line 34 can be restricted.

  The second separation element 66 is configured by a 1/4 wavelength tip short-circuited stub with respect to the frequency band f2 transmitted and received by the second element 2, thereby transmitting the frequency transmitted through the outer surface of the second outer conductor 73. Transmission of the high-frequency signal f2 to the first feed line 32 can be restricted.

  The operation of the above configuration will be described below. The transmission signal in the frequency band f1 in which the first antenna electrode 10 has about half wavelength excites the first antenna electrode 10 via the first feed line 32 and the first feed pin 13, and operates as a transmission antenna. . On the other hand, the first antenna electrode 10 is excited by an incoming radio wave having a frequency that is approximately half a wavelength, and is output from the first feed pin 13 to the first feed line 32, thereby receiving the first antenna electrode 10. Operates as an antenna. The first element 1 operates as an antenna using the second antenna electrode 20 as a ground plane.

  Further, the transmission signal in the frequency band f2 in which the second antenna electrode 20 has about a half wavelength excites the second antenna electrode 20 via the second feeder line 34 and the second outer conductor 73, and serves as a transmission antenna. Operate. On the other hand, the second antenna electrode 20 is excited by an incoming radio wave having a frequency at which the second antenna electrode 20 has a substantially half wavelength, and is output from the second outer conductor 73 to the second feed line 34, thereby receiving the signal. Operates as an antenna.

  The second element 2 operates as an antenna using the third antenna electrode 26 as a ground plane. The output of the signal in the frequency band f2 to the first feed line 32 is greatly attenuated by the first separation element 65, the influence of the first feed line 32 on the second antenna electrode 20 is reduced, and the operation is performed. Stabilize.

  Similarly, the transmission signal in the frequency band f3 in which the third antenna electrode 26 has about a half wavelength excites the third antenna electrode 26 via the third feeder line 37 and the first outer conductor 72, thereby transmitting the transmission antenna. Works as.

  On the other hand, the third antenna electrode 26 is excited by an incoming radio wave having a frequency of approximately half a wavelength, and is output from the first outer conductor 72 to the third feed line 37, thereby receiving the signal. Operates as an antenna. The third element 6 operates as an antenna using the ground electrode 15 as a ground plane.

  In addition, the output of the signal in the frequency band f3 to the second feed line 34 is greatly attenuated by the second separation element 66, and the influence of the second feed line 34 on the third antenna electrode 26 is reduced. Operation is stable.

  It should be noted that the material of the first dielectric block 12 and the second dielectric block 22 is made of a dielectric ceramic having a good temperature characteristic, so that it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna. .

  With the above configuration, the first antenna electrode 10 has the second antenna electrode 20 as the ground reference for the high-frequency signal, and the second antenna electrode 20 has the third antenna electrode 26 as the ground reference for the high-frequency signal. The antenna electrode 26 can be operated as an antenna with the ground electrode 15 as a ground reference, and the first separation element 65, the second separation element 66, the first transmission line, the second transmission line, the third transmission line, An antenna can be realized with an inexpensive structure by configuring the transmission line on a multilayer substrate.

(Embodiment 8)
FIG. 13 is a perspective view of a multiple resonance type dielectric antenna according to an eighth embodiment of the present invention. In FIG. 13, 4 is a plate-shaped dielectric block, 50 is a fourth antenna electrode, 51 is a fifth antenna electrode formed inside the fourth antenna electrode 50, and 52 is a fourth antenna electrode 50. The connected fourth power supply pin 53 is a fifth power supply pin connected to the fifth antenna electrode 51.

  The operation of the above configuration will be described below. The transmission signal in the frequency band f4 in which the fourth antenna electrode 50 has about a half wavelength is transmitted from the feed line formed on the back surface of the ground conductor 3 to the fourth feed pin 52 as in the configuration described in the first embodiment. The fourth antenna electrode 50 is excited via the, and operates as a transmitting antenna. On the other hand, the fourth antenna electrode 50 is excited by an incoming radio wave in the frequency band f4 in which the fourth antenna electrode 50 has almost a half wavelength, and is output from the fourth power supply pin 52 to the power supply line. Operate.

  Similarly, the fifth antenna electrode 51 and the 54th feed pin 53 operate as a transmitting / receiving antenna in the frequency band f5 corresponding to the shape of the fifth antenna electrode 51.

  By setting the frequency band f5 higher than f4, the fifth antenna electrode 51 can be configured inside the fourth antenna electrode 50, and the overall size can be reduced.

  FIG. 14 is a perspective view showing another configuration of the eighth embodiment. In FIG. 14, reference numeral 25 denotes a degenerate separation element provided on the fourth antenna electrode 50. The degenerate separation element 25 has the function described in the first embodiment.

  The operation of the above configuration will be described below. For example, when a GPS service and a VICS service are enjoyed by an in-vehicle wireless device mounted on a car, an electromagnetic wave having a circularly polarized wave in the 1.5 GHz band in GPS and a linearly polarized wave component in the 2.5 GHz band in VICS. Need to receive.

  When the antenna electrode shape corresponding to the 1.5 GHz band as f4 and the 2.5 GHz band as f5 is formed, the fourth antenna electrode 50 includes the degenerative separation element 25, so that the circular polarization type 1 .5 GHz band electromagnetic waves can be received efficiently.

  On the other hand, since the degeneration separation element 25 is not provided in the fifth antenna electrode 51, it is possible to efficiently receive the electromagnetic wave in the 2.5 GHz band of the linearly polarized wave type, and also supports a plurality of specific services as described above. It becomes possible to do.

  FIG. 15 is a perspective view showing another configuration of the eighth embodiment. In FIG. 15, 56 is a fourth feed line electrically insulated from a ground surface (not shown) formed on the surface of the ground conductor 3, and 57 is a fourth feed line.

  The fourth feed line 56 is electromagnetically coupled to the fourth antenna electrode 50. Therefore, the fourth antenna electrode 50 is excited by the transmission signal and operates as a transmission antenna. The high-frequency signal excited by the incoming radio wave is output from the fourth antenna electrode 50 to the fourth feed line 56 to operate as a receiving antenna. Similarly, the fifth feeder line 57 operates as a transmission / reception antenna by being connected to the fifth antenna electrode 51 by electromagnetic coupling.

  In FIG. 15, both the fourth power supply pin 52 and the fifth power supply pin 53 are eliminated, and electromagnetically coupled through the fourth power supply line 56 and the fifth power supply line 57 formed in the ground conductor 3. Although the configuration has been described, only one of them may be used.

  In addition, although the structure which provided the degeneracy separation element 25 in the 4th antenna electrode 50 was demonstrated, according to the polarization characteristic in two types of frequency bands transmitted / received, the 4th antenna electrode 51 or the 5th antenna electrode 51 or both. 13 to 15 show a rectangular patch antenna element as an antenna electrode, a circular patch antenna element may be used.

  In addition, by forming the dielectric block 4 with a dielectric ceramic having a good temperature characteristic, it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna.

  For feeding power to the fourth antenna electrode 50 and the fifth antenna electrode 51, the surface of the ground conductor 3 is the ground plane 36, a slot is provided at a predetermined position, and a slot is formed from a feed line formed on the back surface of the ground conductor 3. You may couple | bond by the electric power feeding method.

  With the above configuration, it is possible to configure a multi-resonant dielectric antenna that supports two types of frequency bands, and to realize a compact multi-resonant dielectric antenna that supports the desired polarization characteristics. It becomes.

(Embodiment 9)
FIG. 16 is a cross-sectional view of the multiple resonance type dielectric antenna according to the ninth embodiment of the present invention. The perspective view is the same as FIG. 13 described in the eighth embodiment.

  In FIG. 16, reference numeral 41 denotes a fourth antenna electrode 50 formed on the surface and a trapezoidal cross section and an annular dielectric block A, and 42 denotes a fifth antenna electrode 51 formed on the surface and fitted to the dielectric block A41. This is a dielectric block B. The dielectric block A41 and the dielectric block B42 are made of materials having different relative dielectric constants.

  The operation of the above configuration will be described below. As described in the third embodiment, the directivity characteristics of the electromagnetic wave radiated or received from the fourth antenna electrode 50 or the fifth antenna electrode 51 varies depending on the shape and positional relationship between the antenna electrode and the dielectric block and the ground conductor. To do.

  As described in the third embodiment, the electric field vector formed between the fifth antenna electrode 51 and the ground plane 36 of the ground conductor 3 is different from each other at the boundary between the dielectric block A41 and the dielectric block B42. Refracted according to the dielectric constant and the direction of the boundary surface, and as a result, the directivity is changed.

  Similarly, the electric field vector formed between the fourth antenna electrode 50 and the ground plane 36 changes according to the outer shape of the dielectric block 41A, and as a result, the directivity changes. That is, the directivity characteristics of the fourth antenna electrode 52 and the fifth antenna electrode 51 can be controlled by the relative permittivity and shape of the dielectric block A41 and the dielectric block B42.

  For example, when a vehicle-mounted wireless device mounted on a car enjoys 5.8 GHz band narrow area communication such as a 2.5 GHz band VICS service and an automatic toll collection system, the directional characteristics described in the third embodiment are used. Required. The fifth antenna electrode 51 has an antenna electrode shape corresponding to the 5.8 GHz band and the fourth antenna electrode 50 corresponds to the 2.5 GHz band, and the relative permittivity and shape of the dielectric block A41 and the dielectric block B42 are changed. By optimizing, it becomes possible to match the directivity characteristics transmitted and received by the fifth antenna electrode 51 to the directivity characteristics required in the narrow area communication system.

  It should be noted that the material of the dielectric block A41 and the dielectric block B42 is made of a dielectric ceramic having a good temperature characteristic, so that it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna.

  In addition, although the structure via the power feeding pins 52 and 53 has been described as power feeding to the two antenna electrodes 50 and 51, a slot is provided on the ground surface 36 and power can be fed from the power feeding lines 56 and 57 to the slot power feeding method. good. Further, the feeder lines 56 and 57 may be formed on the ground layer 36 surface side of the ground conductor 3 and electromagnetically coupled to the antenna electrodes 50 and 51.

  With the above configuration, it is possible to realize a multi-resonant dielectric antenna with controlled directivity by changing the relative permittivity and shape of the two dielectric blocks.

(Embodiment 10)
FIG. 17 is a perspective view of a multiple resonance type dielectric antenna according to the tenth embodiment of the present invention. 17 is different from FIG. 13 in that a sixth antenna electrode 54 is provided inside the fifth antenna electrode 51.

  The operation of the above configuration will be described below. As described in the eighth embodiment, the fourth antenna electrode 50 and the fifth antenna electrode 51 operate as antennas in the frequency bands of f4 and f5. Similarly, a transmission signal in a frequency band f6 in which the sixth antenna electrode 54 has about a half wavelength is transmitted from the feed line (not shown) formed on the back surface of the ground conductor 3 via the sixth feed pin 55 to the sixth. The antenna electrode 54 is excited and operates as a transmitting antenna.

  On the other hand, the sixth antenna electrode 54 is excited by the incoming radio wave in the frequency band f6 in which the sixth antenna electrode 54 has almost a half wavelength, and is output from the sixth power supply pin 55 to the power supply line. Operate.

  By setting the frequency band f6 higher than f5 and f5 higher than f4, the fifth antenna electrode 51 is set inside the fourth antenna electrode 50, and the sixth antenna electrode is set inside the fifth antenna electrode 51. 54 can be configured, and the overall size can be reduced.

  FIG. 18 is a perspective view showing another configuration of the tenth embodiment. 18 is different from FIG. 17 in that the degenerative separation element 25 is provided on the fourth antenna electrode 50 and the sixth antenna electrode 54. By providing the degeneracy separation element 25, as described in the first embodiment, it is possible to cope with a plurality of services having different polarization formats.

  FIG. 19 is a perspective view showing still another configuration of the tenth embodiment. 19 differs from FIG. 18 in that the fifth antenna electrode 51 is eliminated and a feeding portion 71 is provided on a part of the inner periphery of the fourth antenna electrode 50, so that the ground conductor 3 (not shown) The fifth difference is that a fifth power feeding circuit 70 which is electrically insulated is provided.

  The operation of the above configuration will be described below. The fourth antenna electrode 50 and the sixth antenna electrode 54 operate as antennas corresponding to the frequency bands of f4 and f6, respectively, as described in the configuration of FIG.

  The operation of the antenna is in a complementary relationship, and the portion between the fourth antenna electrode 50 and the sixth antenna electrode 54 is shaped into this shape by supplying power to the edge of the inner periphery of the fourth antenna electrode 50. It operates as an antenna corresponding to the corresponding frequency band f6.

  That is, the transmission signal in the frequency band f5 excites the edge of the fourth antenna electrode 50 from the fifth feeding line 70 to the feeding unit 71 by electromagnetic coupling, and as a result, operates as a transmission antenna. On the other hand, the edge of the fourth antenna electrode 50 is excited by the incoming radio wave in the frequency band f5, and operates as a receiving antenna by being output from the power feeding unit 71 to the fifth power feeding line 70 by electromagnetic coupling.

  18 and 19, the configuration in which the degenerative separation element 25 is provided in the third antenna electrode 50 and the fifth antenna electrode 54 has been described. However, the degenerative separation is performed according to the polarization characteristics in three types of frequency bands. An element 25 may be provided. 18 and 19, a rectangular patch antenna element is described as the antenna electrode, but a circular patch antenna element may be used.

  In addition, by forming the dielectric block 4 with a dielectric ceramic having a good temperature characteristic, it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna.

  Further, as power feeding to each antenna electrode via the power feeding pin, a slot is formed on the ground surface 36 of the ground conductor 3 and a power feeding line is formed on the back surface of the ground conductor 3, and power is fed to the antenna electrode by the slot power feeding method. good. Alternatively, a feed line may be formed on the ground layer 36 surface side of the ground conductor 3 and electromagnetically coupled to the antenna electrode.

  With the above configuration, it is possible to configure a multi-resonant dielectric antenna corresponding to three types of frequency bands, and to realize a compact multi-resonant dielectric antenna corresponding to a desired polarization characteristic. It becomes.

(Embodiment 11)
FIG. 20 is an exploded view of the multiple resonance type dielectric antenna according to the eleventh embodiment of the present invention. In contrast to the configuration described in the first to tenth embodiments, a connecting portion 80 is inserted between the antenna element and the ground conductor 3, and FIG. 20 shows the multi-resonance dielectric antenna of FIG. 4 described in the second embodiment. A connection unit 80 is added to the configuration.

  In FIG. 20, reference numeral 80 is a connecting portion made of a dielectric block and having the same shape as the first element 1 and the second element 2, and 81 is provided at a position corresponding to the first power supply pin 13 of the connecting portion 80. The first feeding point, 82 is the second feeding point provided at a position corresponding to the second feeding pin 23, 83 is the first frequency separation element connected to the first feeding point 81, and 84 is the first feeding point. The second frequency separation element connected to the second feeding point 82, 85 is a one-port feeding end connected to the first frequency separation element 83 and the second frequency separation element 84, and 86 is a ground conductor. 3 is a feed line that is connected to the 1-port feed end 85 when installed in the port 3.

  The operation of the above configuration will be described below. The first antenna electrode 10 is configured to transmit and receive electromagnetic waves in the frequency band f1, and the second antenna electrode 20 is configured to transmit and receive electromagnetic waves in the frequency band f2. The first frequency separation element 83 is an element patterned on the surface of the connection portion 80 that is a dielectric block, and has a filter function of allowing a signal in the frequency band f1 to pass therethrough. Similarly, the second frequency separation element 84 has a function of passing a signal in the frequency band f2.

  The feed line 86 is connected to a high-frequency transmission / reception unit configured from a transmission unit and a reception unit (not shown). A signal in the frequency band f1 generated in the high-frequency transmission / reception unit is input from the feed line 86 to the first frequency separation element 83 and the second frequency separation element 84 through the 1-port feed end 85. Is transmitted only to the first feeding point 81 due to the transmission characteristic of the first antenna, and excites the first antenna electrode 10 via the first feeding pin 13 to radiate an electromagnetic wave in the frequency band f1. Similarly, the signal in the frequency band f2 excites the second antenna electrode 20 via the second frequency separation element 84, the second feeding point 82, and the second feeding pin 23, and the radio wave in the frequency band f2 Radiate.

  The signal of the frequency band f1 reduces the influence on the second antenna electrode 20 by the second frequency separation element 84. Conversely, the signal of the frequency band f2 is the first antenna electrode 10 by the first frequency separation element 83. Since the influence on the antenna can be reduced, the characteristics as an antenna can be improved.

  The incoming radio wave in the frequency band f1 excites the first antenna electrode 10 and the second antenna electrode 20 at a minute level, but the second frequency separation element 84 outputs an output to the feed line 86. prevent. Conversely, the output of the first antenna electrode 10 excited by the incoming radio wave in the frequency band f2 can be limited to the output to the feed line 86 by the first frequency separation element 83.

  In addition, although the 1-port power supply end 85 is configured in the side portion of the connection portion 80, a through hole may be provided in the connection portion 80 and connected to the power supply line 86 with a power supply pin. Further, although the feeder line 86 is formed on the surface of the ground conductor 3, it may be on the back surface or inside. Furthermore, although the first frequency separation element 83 and the second frequency separation element 84 are formed on the surface of the connection portion 80, they may be on the back surface or inside.

  In addition, by configuring the dielectric block material, which is the base material of the connection portion 80, with a dielectric ceramic having a good temperature characteristic, it is possible to adapt to a part having a severe temperature environment such as an in-vehicle antenna.

  As described above, it is possible to realize a one-port power supply type double resonance type dielectric antenna with reduced mutual influences in a plurality of frequency bands.

(Embodiment 12)
FIG. 21 is a block diagram of the in-vehicle wireless device according to the twelfth embodiment of the present invention. In FIG. 21, 5 is a multi-resonant dielectric antenna having any of the configurations described in the first to fifth embodiments or 8 to 10, and 91 is a number corresponding to the number of wireless services supported by the multi-resonant dielectric antenna 5. A plurality of high frequency transmission / reception units, 92 is a plurality of signal processing units connected to the high frequency transmission / reception unit 91, 95 is a display unit connected to the signal processing unit 92, and 93 controls operations of the signal processing unit 92 and the display unit 95. An operation control unit 94 is an operation unit. The in-vehicle wireless device 90 includes the multi-resonance dielectric antenna 5, the high frequency transmission / reception unit 91, the signal processing unit 92, the operation control unit 93, the operation unit 94, and the display unit 95.

  The operation of the above configuration will be described below. The in-vehicle wireless device 90 is installed in a vehicle, for example, on a dashboard, and performs a plurality of wireless services, for example, wireless communication in the frequency band f1 and the frequency band f2.

  FIG. 22 is a schematic block diagram of the high frequency transmission / reception unit 91. The high frequency transmission / reception unit 91 modulates a high frequency signal having a predetermined frequency and supplies the modulated high frequency signal to the multi-resonance dielectric antenna 5. A radio wave is composed of a modulation circuit 901, a transmission circuit 902, a reception circuit 903, and a demodulation circuit 904 that demodulate and amplify and filter in a predetermined method. The multi-resonance dielectric antenna 5 is connected to the feed line.

  The transmission circuit 902 and the reception circuit 903 are connected to the multi-resonance dielectric antenna 5 via a switch 908.

  The signal processing unit 92 performs baseband processing, converts the demodulated data output from the high-frequency transmitting / receiving unit 91 into data according to the protocol of each wireless service, and outputs and displays the data on the display unit 95.

  The driver of the vehicle gives an instruction to receive the service in the frequency band f1 through the operation unit 94 including a keyboard and a switch. In response to this instruction, the operation control unit 93 operates only the high frequency transmission / reception unit 91 and the signal processing unit 92 related to the frequency band f <b> 1 among the plurality of high frequency transmission / reception units 91 and signal processing units 92, and causes the display unit 95 to operate the signal processing unit 92. The output result and the transmitted contents are displayed.

  Similarly, when receiving a service in the frequency band f2, the driver instructs the operation unit 95 in the same manner, and the operation control unit 93 operates the corresponding high frequency transmitting / receiving unit 91 and signal processing unit 92. .

  As described above, a single in-vehicle wireless device 90 can enjoy a plurality of wireless services, for example, a VICS service and various automatic fee services, and can correspond to a plurality of wireless services with a device configuration in which in-vehicle wireless devices are reduced.

  In the above description, the configuration corresponding to two wireless services is illustrated, but three or more types of services may be supported according to the configuration of the double resonance type dielectric antenna 5.

  In addition, although the operation of the operation control unit 93 is described as performing one type of frequency band in the same time, it is also possible to perform processing of a plurality of frequency bands simultaneously.

  Further, when simultaneous transmission / reception processing is desired, the switch 908 may be changed to a circulator or the like.

(Embodiment 13)
FIG. 23 is a block diagram of the in-vehicle wireless device according to the thirteenth embodiment of the present invention. The difference from FIG. 21 described in the twelfth embodiment is that the multi-resonance dielectric antenna 5 has any of the configurations described in the sixth to seventh or eleventh embodiments. One high-frequency transmission / reception unit 91 is connected, and there is also one signal processing unit 92.

  The operation of the above configuration will be described below. A plurality of wireless services, for example, wireless communication in frequency band f1 and frequency band f2 are performed. The multi-resonance dielectric antenna 5 can transmit and receive electromagnetic waves in a plurality of frequency bands, and is connected to the high-frequency transmitter / receiver 91 by a one-port power supply end 85.

  FIG. 24 is a schematic block diagram of the high frequency transmitting / receiving unit 91. The high frequency transmitting / receiving unit 91 converts the modulation signal output from the signal processing unit 92 into a high frequency band, amplifies the signal to a desired output, and multi-resonance dielectric antenna 5 And a receiving circuit 903 for converting a high-frequency signal received by the multi-resonant dielectric antenna 5 to a low frequency band and generating a desired IF signal. The IF signal is converted into an analog-digital converter. At 905, the digital signal is converted and output.

  The signal processing unit 92 receives this digital signal, performs filtering processing and demodulation processing by software by digital signal processing, and further performs baseband processing. By configuring the signal processing unit 92 with a digital signal processor or CPU, the above functions can be realized by software.

  The driver of the vehicle designates that the service in the frequency band f1 is received by the operation unit 94 including a keyboard and a switch. By this designation, the operation control unit 93 switches the oscillation frequency of the local signal source 906 of the high-frequency transmitting / receiving unit 91 so that a predetermined high-frequency signal is supplied to the multi-resonant dielectric antenna 5, and also has a predetermined frequency band. The oscillation frequency of the local signal source 907 is switched so that an IF signal can be obtained. The transmission circuit 902 and the reception circuit 903 are connected to the multi-resonance dielectric antenna 5 via a switch 908.

  Further, the operation control unit 93 instructs the signal processing unit 92 to perform processing related to the frequency band f1. The signal processing unit 92 responds to the processing operation related to the frequency band f1 by switching the software, and displays the processing result on the display unit 95.

  Similarly, when receiving the service in the frequency band f2, the driver similarly instructs the operation unit 95, and the operation control unit 93 controls the oscillation frequency of the local signal sources 906 and 907 of the high frequency transmission / reception unit 91 in response to this instruction. In addition, this can be achieved by changing the software of the signal processing unit 91.

  As described above, a plurality of wireless services such as a VICS service and various automatic charges are provided by one in-vehicle wireless device 90 in which the multi-resonance dielectric antenna 5, the high-frequency transmission / reception unit 91, and the signal processing unit 91 are each configured as one. The service can be enjoyed, and a plurality of wireless services can be handled with a device configuration that reduces the number of in-vehicle wireless devices.

  In the above description, the configuration corresponding to two wireless services is illustrated, but three or more types of services may be supported according to the configuration of the double resonance type dielectric antenna 5.

  Further, when simultaneous transmission / reception processing is desired, the switch 908 may be changed to a circulator or the like.

  As described above, according to the configuration of the present invention, it is possible to realize a small multi-resonance dielectric antenna in which the influence of the interaction between the first antenna electrode and the second antenna electrode is reduced.

  In addition, each antenna electrode is provided with a degenerative separation element according to the target radio service, so that it can cope with circular polarization, and the first and second dielectric blocks have different ratios between the antenna electrode portion and the other portions. A compact multi-resonant dielectric antenna with controlled directivity can be realized by configuring with two dielectric blocks having a dielectric constant and adjusting the cross-sectional shape of each dielectric block.

  The multi-resonance dielectric antenna and the in-vehicle wireless device according to the present invention can realize a small multi-resonance dielectric antenna with reduced influence of interaction between the first antenna electrode and the second antenna electrode. It is useful as an antenna or the like used for radio equipment for mobile communication in the microwave and millimeter wave bands. In particular, it is useful for applications such as a multi-resonance dielectric antenna corresponding to a radio device mounted in a car and an in-vehicle radio device.

The perspective view of the double resonance type dielectric antenna in one Example of the present invention 1 is an exploded view of a double resonance type dielectric antenna according to an embodiment of the present invention. FIG. The perspective view of the ground conductor back surface in one Example of this invention The perspective view of the double resonance type dielectric antenna in one Example of the present invention 1 is a cross-sectional view of a double resonance type dielectric antenna according to an embodiment of the present invention. 1 is a cross-sectional view of a double resonance type dielectric antenna according to an embodiment of the present invention. 1 is a cross-sectional view of a double resonance type dielectric antenna according to an embodiment of the present invention. 1 is a cross-sectional view of a double resonance type dielectric antenna according to an embodiment of the present invention. FIG. 4 is a ground metal layer pattern diagram of a double resonance type dielectric antenna according to an embodiment of the present invention. 1 is a cross-sectional view of a double resonance type dielectric antenna according to an embodiment of the present invention. 1 is a cross-sectional view of a double resonance type dielectric antenna according to an embodiment of the present invention. FIG. 4 is a ground metal layer pattern diagram of a double resonance type dielectric antenna according to an embodiment of the present invention. The perspective view of the double resonance type dielectric antenna in one Example of the present invention The perspective view of the double resonance type dielectric antenna in one Example of the present invention The perspective view of the double resonance type dielectric antenna in one Example of the present invention 1 is a cross-sectional view of a double resonance type dielectric antenna according to an embodiment of the present invention. The perspective view of the double resonance type dielectric antenna in one Example of the present invention The perspective view of the double resonance type dielectric antenna in one Example of the present invention The perspective view of the double resonance type dielectric antenna in one Example of the present invention 1 is an exploded view of a double resonance type dielectric antenna according to an embodiment of the present invention. FIG. 1 is a schematic block diagram of an in-vehicle wireless device according to an embodiment of the present invention. 1 is a schematic block diagram of a high frequency transmission / reception unit in one embodiment of the present invention. 1 is a block diagram of an in-vehicle wireless device according to an embodiment of the present invention. 1 is a schematic block diagram of a high frequency transmission / reception unit in one embodiment of the present invention. Diagram showing the configuration of a multi-resonance antenna in a conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st element 2 2nd element 3 Ground conductor 4 Dielectric block 5 Double resonance type dielectric antenna 6 3rd element 10 1st antenna electrode 11 1st feed point 12 1st dielectric block 13 1st 1 feed pin 14 first through hole 15 ground electrode 20 second antenna electrode 21 second feed point 22 second dielectric block 23 second feed pin 24 through hole 241 second through hole 25 degenerate separation Element 26 Third antenna electrode 27 Third dielectric block 28 Through hole 30, 31 Through hole 32 First feed line 33 Feed terminal 34 Second feed line 36 Ground plane 361 First ground layer 37 Third Feed line 38 Fourth feed line 41 Dielectric block A
42 Dielectric Block B
43 Electric field vector 50 4th antenna electrode 51 5th antenna electrode 52 4th feed pin 53 5th feed pin 54 6th antenna electrode 55 6th feed pin 56 4th feed line 57 5th feed Line 60 Coaxial tube 601 Double coaxial tube 61 First substrate 62 Second substrate 63 Spatial layer 64 Second ground layer 65 First separation element 66 Second separation element 67 Spatial layer 68 Third substrate 69 First Third ground layer 70 Fourth power supply circuit 71 Power supply portion 72, 73 Outer conductor 74 First metal layer 75 Second metal layer 76 Third metal layer 77 Fourth metal layer 78, 79 Through-hole 80 Connection portion 81 1st feeding point 82 2nd feeding point 83 1st frequency separation element 84 2nd frequency separation element 85 1 port feeding end 86 Feeding line 87 Through hole 90 In-vehicle wireless device 91 high frequency transmission / reception unit 92 signal processing unit 93 operation control unit 94 operation unit 95 display unit 901 modulation circuit 902 transmission circuit 903 reception circuit 904 demodulation circuit 905 analog / digital converter 906,907 local signal source 908 switch 101, 102 radiation conductor 103 cutting Notch 104, 105, 106 Dielectric substrate 107 Ground conductor 108 Rectangular slot 109 Circular tube slot 110, 111 Microstrip line 112 Hybrid circuit

Claims (5)

A first element having a first antenna electrode formed on a first dielectric block;
A second antenna electrode formed on a second dielectric block for transmitting, receiving, or transmitting / receiving electromagnetic waves in a lower frequency band than the first antenna electrode, and the second element is Layered under the first element,
Forming a first feed line that feeds power to the first element and a second feed line that feeds power to the second element on one side of the ground conductor as a ground plane;
The first feed pin inserted into the through hole provided in the second element, the through hole provided in the feed point of the first element, and the through hole provided in the ground conductor, the first conductor of the first conductor. Electrically connecting the feeder line and the first antenna electrode;
The first feeder line and the second antenna electrode of the ground conductor are connected by a through-hole provided in the feed point of the second element and a second feed pin inserted into a through-hole provided in the ground conductor. Electrically connect,
An antenna in which a through hole provided in the second element through which the first power feeding pin passes is arranged at a position where the electric flux at the time of antenna operation of the second element is 20% or less than the electric flux at the end. And
The dielectric block includes a plurality of feeding points according to the feeding position of each antenna electrode, and a frequency separation element connected to each feeding point and having a pass characteristic according to the resonance frequency of each antenna electrode. Forming a pattern on the surface of the body block, providing a feeding end that couples the plurality of frequency separation elements at one point, and connecting and fixing in a laminated manner between the antenna unit and the ground conductor;
A double resonance type dielectric antenna including: Two types of antenna electrodes are provided in a ring shape on the surface of the dielectric block,
Forming a first feed line for feeding power to the first antenna electrode and a second feed line for feeding power to the second antenna electrode on one side of the ground conductor as a ground plane;
An antenna part electrically connected to each feed line with a feed pin inserted in a through hole provided at a feed point of each antenna electrode;
The dielectric block includes a plurality of feeding points according to the feeding position of each antenna electrode, and a frequency separation element connected to each feeding point and having a pass characteristic according to the resonance frequency of each antenna electrode. Forming a pattern on the surface of the body block, providing a feeding end that couples the plurality of frequency separation elements at one point, and connecting and fixing in a laminated manner between the antenna unit and the ground conductor;
A double resonance type dielectric antenna including: The multi-resonance dielectric antenna according to claim 1 or 2, wherein the outer shape of the connecting portion is the same as that of the antenna portion. 4. The multi-resonant dielectric antenna according to claim 1, wherein the dielectric block is a dielectric ceramic. The double resonance type dielectric antenna according to any one of claims 1 to 3,
A high-frequency transceiver connected to the multi-resonant dielectric antenna;
A signal processing unit connected to the high-frequency transmitting / receiving unit to perform baseband signal processing;
An operation control unit connected to the high-frequency transceiver unit and the signal processing unit, a display unit and an operation unit;
The high frequency transmitting / receiving unit converts a frequency of the local signal source that changes the frequency by operation control and a modulation signal output from the signal processing unit into a high frequency band by a mixer according to the output of the local signal source, thereby forming a double resonance type dielectric antenna. Transmitting means for outputting, and receiving means for converting the incoming radio wave received by the multi-resonant dielectric antenna into a specific intermediate frequency band according to the output of the local signal source by the mixer,
The operation control unit specifies the processing method of the signal processing unit and means for changing the output frequency band of the local signal source of the high frequency transmitting / receiving unit according to the output of the operator unit,
The signal processing unit has an analog-digital converter and converts the output of the high-frequency transmission / reception unit into digital, and a digital-analog converter converts the modulation signal, which is an output signal, into analog and outputs it to the high-frequency transmission / reception unit An in-vehicle wireless device having baseband signal processing means from the captured digital signal, and means for changing these means by software switching according to an instruction from the operation control unit.

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