JP4207011B2 - Circular patch antenna and circular patch array antenna apparatus using the same - Google Patents

Description

  The present invention relates to an annular patch antenna that radiates circularly polarized radio waves used for transmission and reception in satellite communications and the like, and an annular patch array antenna apparatus using the same.

  Conventionally, an annular patch antenna has an annular patch formed on the upper surface of a dielectric substrate having a ground conductor on the lower surface and a ground conductor by a short-circuit conductor (inner conductor, conductor tube, through hole) penetrating the dielectric substrate. Some were connected (see, for example, Patent Document 1).

  Then, by providing a perturbation element (degenerate separation element) such as a protrusion or notch on the outer periphery of the annular patch itself, an annular patch antenna that emits circularly polarized radio waves from the annular patch can be obtained. . Also, patch antennas that radiate circularly polarized radio waves do not have perturbing elements such as protrusions and cutouts, and if the radiating conductor plate (patch) is rotated 90 degrees around the center, the original figure And at least a pair of short-circuit conductors (through-holes, conductor pins, etc.) for grounding the radiating conductor plate on two straight lines passing through the center of symmetry and orthogonal to each other. Some power is supplied from the edge of the radiating conductor plate that forms 45 degrees with respect to the straight line (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 9-130136 (FIG. 1)

JP-A-8-213829 (FIG. 1)

However, when the antenna frequency is increased and the wavelength is shortened, in Patent Document 1, it is necessary to excite in the TM ₁₁ mode, which is the same base mode as the circular patch antenna of the same diameter, when performing circular polarization synthesis. There is. However, the ratio b / a of the short-circuit conductor (inner conductor, conductor tube, through hole) radius b to the radius a of the annular patch (hereinafter, the ratio b / a is referred to as the inner / outer radius ratio of the annular patch antenna). As it becomes larger (if the radius b is constant, the use frequency becomes higher and the radius a becomes larger, the inner / outer radius ratio becomes relatively larger), and the excitation power of the unnecessary higher-order mode whose circumferential wave number is 1 or more. Is larger than a circular patch antenna having the same diameter, and therefore sufficient degeneracy separation cannot be performed with respect to the TM ₁₁ mode, which is a desired excitation mode, and a good axial ratio cannot be obtained. Further, in the conventional annular patch antenna, since the base mode is not the TM ₁₁ mode but the TM ₀₁ mode, there is a problem that the excitation power of the unnecessary higher-order mode is larger than that of the circular patch antenna.

  On the other hand, in Patent Document 2, the position accuracy of the short-circuit conductor is sufficiently smaller than the wavelength at the resonance frequency, instead of providing a perturbation element such as a protrusion or a notch on the outer periphery of the annular patch itself. Is required (for example, about 1/20 or less of the wavelength), a high accuracy is required at the position where the short-circuit conductor is disposed, and there is a problem that it is difficult to ensure sufficient positional accuracy.

  Furthermore, when a perturbation element such as a protrusion or notch is provided on the outer periphery of the annular patch itself, the shape of the outer periphery of the annular patch that is the radiation surface changes, so the shape of the radiation pattern of the annular patch antenna There was also a problem of affecting the

  Accordingly, the present invention has been made to solve the above-described problems, and a novel annular patch antenna that obtains a good radiation pattern and axial ratio even when the antenna is used at a relatively high frequency, and the same It is an object of the present invention to provide an annular patch array antenna device using the.

  An annular patch antenna according to the invention of claim 1 is provided with a conductor plate, an annular patch disposed opposite to the conductor plate, a center axis of the annular patch provided between the annular patch and the conductor plate. A cylindrical or annular short-circuit conductor member connected to the annular patch and the conductor plate, and having a diameter smaller than the diameter of the annular patch, and the annular patch and the conductor plate A dielectric plate provided on the outside of the short-circuit conductor member in between, a power feeding means for feeding power to the feeding point of the annular patch, and circularly polarized radio waves from the annular patch by the power feeding means Further, the short-circuit conductor member is provided with a protrusion protruding outward on the side surface of the column or ring and provided at a position symmetrical to the central axis of the ring patch.

  An annular patch antenna according to a second aspect of the present invention is the annular patch antenna according to the first aspect, wherein the protrusion is a conductive pin.

  An annular patch antenna according to the invention of claim 3 is provided with a conductor plate, an annular patch disposed opposite to the conductor plate, and provided between the annular patch and the conductor plate, and the annular patch and the conductor. A cylindrical or annular side surface connected to a plate and having a diameter smaller than the diameter of the annular patch in common with the central axis of the annular patch; and a position symmetrical to the central axis of the annular patch. A short-circuit conductor member having a flat surface in a state in which a side surface is cut out in the central axis direction, a dielectric plate provided outside the short-circuit conductor member between the annular patch and the conductor plate, and the circle Feeding means for feeding power to the feeding point of the ring patch is provided, and circularly polarized radio waves are radiated from the annular patch by feeding of the feeding means.

  An annular patch antenna according to the invention of claim 4 is provided with a conductor plate, an annular patch disposed opposite to the conductor plate, and provided between the annular patch and the conductor plate. It is connected to the conductor plate and is symmetrical with respect to the central axis of the annular patch on a cylindrical or annular side surface having a diameter smaller than the diameter of the annular patch with the central axis of the annular patch in common. A short-circuit conductor member in which a protrusion is formed on the side surface of the position or a flat surface portion is formed in a state of being cut out in the central axis direction, provided between the annular patch and the conductor plate outside the short-circuit conductor member A first dielectric material provided on the annular patch, smaller than the diameter of the annular patch and larger than the diameter of the short-circuit conductor member with respect to a central axis common to the annular patch Circular patch with diameter, this circular patch A second dielectric provided between the annular patch and the circular patch that feeds the annular patch through the conductor plate and the first dielectric on the outside of the circular patch. And a second power supply means for supplying power to the circular patch through the inside of the short-circuit conductor member.

  According to a fifth aspect of the present invention, an annular patch array antenna device includes a conductor plate, an annular patch disposed opposite to the conductor plate, and provided between the annular patch and the conductor plate. A cylindrical or annular short-circuit conductor member having a central axis in common and having a diameter smaller than the diameter of the annular patch and connected to the annular patch and the conductor plate, and the annular patch and the conductor The short-circuit conductor member has a dielectric plate provided on the outside of the short-circuit conductor member between the plate and the circular patch to radiate circularly polarized radio waves by supplying power to the circular patch. A circular patch antenna that radiates circularly polarized radio waves by forming a projection or a notch at a position symmetrical to the central axis on the side surface of the cylinder or ring, and the circular patch antenna Arranged in a shape The connection points in the annular patch antenna are arranged in the row direction, adjacent circular patch antennas in the column direction are connected to each other between adjacent columns, and the midpoints of these connections are connected to each other. A connection line and a feed line that supplies power to the midpoint of the connection line are provided.

  As described above, according to the first to third aspects of the present invention, the protrusion is a position symmetrical to the central axis of the annular patch and protrudes outward on the side surface of the column or the ring of the short-circuit conductor member. Or an annular patch by providing a plane portion in a state symmetrical to the central axis of the annular patch and having a cylindrical or annular side surface of the short-circuit conductor member cut out in the direction of the central axis. Thus, an annular patch antenna that radiates circularly polarized radio waves can be obtained, and a good radiation pattern and axial ratio can be obtained.

  According to the invention of claim 4, the circular patch having a diameter smaller than the diameter of the annular patch and larger than the diameter of the short-circuit conductor member with respect to the central axis common to the annular patch is provided. The circular patch passes through the conductor plate and the first dielectric on the outside of the patch and feeds the circular patch through the inside of the short-circuit conductor member, so that the circular patch can be used without disturbing the radiation pattern of the circular patch. Therefore, a good radiation pattern and axial ratio can be obtained.

  According to the invention of claim 5, the annular patch antennas that radiate circularly polarized radio waves are arranged in a matrix, the connection points in each annular patch antenna are arranged in the row direction, and the column direction in the adjacent column Since adjacent annular patch antennas are connected to each other between adjacent columns, a connection line that connects the midpoints of these connections is provided, and a feed line that feeds the midpoint of this connection line is provided. An annular patch array antenna device having a good radiation pattern and axial ratio can be obtained.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a configuration diagram of an annular patch antenna according to the first embodiment. FIG. 1A is a plan view of the annular patch antenna, and FIG. 1B is a cross-sectional view of the annular patch antenna. . 1 (a) and 1 (b), 1 is a conductor plate, 2 is a conductive annular patch disposed opposite to the conductor plate 1, and 3 is provided between the annular patch 2 and the conductor plate 1, This is a short-circuit conductor member having a diameter smaller than the diameter of the annular patch 2 with the central axis of the patch 2 in common and electrically connected to the annular patch 2 and the conductor plate 1. Reference numeral 4 denotes a dielectric plate provided outside the short-circuit conductor member 3 between the annular patch 2 and the conductor plate 1 and provided on the conductor plate 1. Reference numeral 5 denotes a feeding point that feeds power to the annular patch 2, and the position of the feeding point 5 in the annular patch 2 is shown in FIG. Reference numeral 6 denotes power feeding means, for example, connecting the inner conductor of the coaxial cable to the feeding point 5 of the annular patch 2 through the conductor plate 1 and the dielectric plate 4, and connecting the outer conductor to the conductor plate 1 as shown in FIG. ) Is connected as shown. The positional relationship between the position of the feeding point 5 and the short-circuit conductor plate 3 will be described below.

  FIG. 2 is a perspective view of a short-circuit conductor member used for the annular patch antenna according to the first embodiment. In FIG. 2, 7 designates the central axis of the short-circuit conductor member 3 as a common central axis by matching the central axis of the annular patch 2 and projects outward on the cylindrical side surface of the short-circuit conductor member 3. It is the protrusion part extended in the direction. The protrusion 7 is indicated by a dotted line inside the annular patch 2 in FIG. In FIG. 1A, the angle formed by the projection 7 of the short-circuit conductor member 3 with respect to the line connecting the center point of the annular patch 2 on the central axis of the short-circuit conductor member 3 and the feeding point 5 is approximately 45 degrees, 135 I try to be a degree. What is necessary is just to adjust the angle which the projection part 7 of the short circuit conductor member 3 makes so that the annular patch 2 may radiate | emit the circularly polarized wave so that it may demonstrate later.

  FIG. 3 is a correlation diagram of the inner / outer radius ratio of the annular patch, FIG. 3 (a) is a correlation diagram of the propagation mode and the inner / outer radius ratio of the annular patch antenna, and FIG. 3 (b) is the standard of the annular patch. FIG. 6 is a correlation diagram of the radius a and area S and the inner / outer radius ratio of the annular patch antenna. Note that the normalized excitation power is normalized by the excitation power in the mode in which the wave number in the circumferential direction is 1, and the normalized radius a and the area S are normalized by the radius and area of the circular patch (b / a = 0) having the same diameter. It has become. FIG. 4 is an electric field distribution diagram in a cross section of the annular patch antenna, and FIG. 5 is a radiation pattern diagram according to the propagation mode of the annular patch antenna according to the first embodiment, where the radial wave number is 1. It is. 5A shows the radiation pattern on the electric field surface, and FIG. 5B shows the radiation pattern on the magnetic field surface. 6A and 6B are magnetic field distribution diagrams of the annular patch. FIG. 6A is a magnetic field distribution diagram that does not consider the feeding point, and FIG. 6B is a magnetic field distribution diagram that considers the feeding point. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

Thus, in the annular patch antenna, as shown in FIG. 3 (a), the higher-order mode cutoff frequency decreases as the inner / outer radius ratio of the annular patch antenna increases, and the excitation power of the unnecessary higher-order mode also increases. Become. In addition, as shown in FIG. 3B, when the normalized power a and the area S of the annular patch are increased and the same power is supplied, the electric field strength is relatively near the outer periphery of the annular patch. However, even if a perturbation element such as a protrusion or a notch is provided on the outer periphery of the annular patch, sufficient degeneracy separation cannot be performed with respect to the TM ₁₁ mode which is a desired excitation mode.

However, as shown in FIG. 4, the electric field E in the cross section of the annular patch antenna is maximum near the outer periphery of the annular patch 2, the electric field E is zero on the surface of the short-circuit conductor member 3, and the surface current density is maximum. Therefore, it protrudes outward on the side surface of the cylinder of the short-circuit conductor member 3, and is provided with a protrusion 7 at a symmetrical position with respect to the central axis of the annular patch 2 to form a perturbation element, with respect to the TM ₁₁ mode which is an excitation mode. Perform degenerate separation. Radiation pattern of propagation mode (unnecessary higher mode) shown in FIG. 5 in the direction of the central axis of the short circuit conductive member 3, less the effect, performs degeneracy separated by projections 7 against the TM ₁₁ mode is the drive mode As a result, it is possible to avoid deterioration of the shape of the radiation pattern due to the axial ratio due to the unnecessary higher-order mode and the perturbation element. Further, the short-circuit conductor member 3 and the protruding portion 7 can be processed by integral cutting with an NC processing machine or the like, and the desired electrical performance can be easily obtained because the accuracy restriction is relatively low. As shown in FIG. 6, the magnetic field distribution of the annular patch is symmetric with respect to the feeding point 5, that is, the symmetry of the radiation pattern is lost. Therefore, while considering impedance matching with the annular patch 2, the feeding point 5 The shape of the radiation pattern may be further improved by adjusting the positional relationship (angle / distance) between the projection 7 and the projection 7. Further, the power feeding means 6 connects not only the vertical power feeding through the dielectric plate 4 from the lower part of the conductor plate 1 by a coaxial cable or the like but also the conductor pattern provided on the upper part of the dielectric plate 4 and the annular patch 2. The feeding point 5 may be fed as horizontal feeding.

  Next, an example (modification) of the first embodiment will be described with reference to FIGS. 7 is a configuration diagram of the annular patch antenna according to the first embodiment, FIG. 7A is a plan view of the annular patch antenna, and FIG. 7B is a cross-sectional view of the annular patch antenna. FIG. 8 is a perspective view of a short-circuit conductor member of the annular patch antenna according to the first embodiment. 8A is a perspective view of an annular short-circuit conductive member, and FIG. 8B is a perspective view of a through-hole short-circuit conductive member. FIG. 9 is a perspective view of a short-circuit conductor member of the annular patch antenna according to the first embodiment, and FIG. 9A is a perspective view of an annular short-circuit conductor member having a protruding portion of a conductive pin, and FIG. Is a cross-section of an annular short-circuit conductor member having a conductive pin protrusion, FIG. 9C is a perspective view of a through-hole short-circuit conductor member having a conductive pin protrusion, and FIG. 9D is a conductive pin. It is a through-hole-shaped short circuit conductor member sectional drawing which has this protrusion part. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  As shown in FIG.7 and FIG.8, the short circuit conductor member 3 is circular, and the effect equivalent to a column shape is acquired. Further, as shown in FIG. 9, the projecting portion 7 is not provided on the side surface of the short-circuit conductor member 3, and the conductive pin protrudes from the inside of the ring, and the conductive pin has its head at the inside of the ring It is fixed. The conductive pin may be finely adjusted as an adjusting screw. In this case, the shape of the radiation pattern can be improved. Note that a dielectric material may be filled in the ring.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 10A and 10B are configuration diagrams of the annular patch antenna according to the second embodiment. FIG. 10A is a plan view of the annular patch antenna, FIG. 10B is a cross-sectional view of the annular patch antenna, and FIG. These are the short-circuit conductor member perspective views of the annular patch antenna which concerns on Embodiment 2. FIG. In FIG. 11, reference numeral 8 denotes a plane portion in a state where the side surface of the short-circuit conductor member 3 at a position symmetrical to the central axis of the annular patch 2 is cut out in the central axis direction. An annular patch antenna incorporating the short-circuit conductor member 3 as shown in FIG. 11 is shown in FIGS. As shown in FIG. 10A, the flat portion 8 of the short-circuit conductor member 3 is inclined to some extent so as not to face the feeding point 5. The inclination angle is adjustable as in the case of FIG. The other configurations shown in FIG. 10 are the same as those in FIG.

12A and 12B are configuration diagrams of the annular patch antenna according to the second embodiment. FIG. 12A is a plan view of the annular patch antenna, and FIG. 12B is a cross-sectional view of the annular patch antenna. FIG. 13 is a perspective view of a short-circuit conductor member of the annular patch antenna according to the second embodiment, and FIG. 13 (a) is a configuration in which a flat portion facing the thick portion is formed on the side surface of the cylindrical short-circuit conductor member. FIG. 13B is a perspective view of the short-circuit conductor member corresponding to the case where the flat surface portions are formed on the opposite sides of the thin annular ring. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. In this way, by providing the flat portion 8 on the side surface portion of the short-circuit conductor member 3 as a perturbation element, degenerate separation is performed with respect to the TM ₁₁ mode, which is the excitation mode, and the same as in the case of the first embodiment There is an effect. Instead of forming the flat portion 8 in the short-circuit conductor member 3, a concave notch portion may be formed in the central axis direction at a position facing the side surface portion of the short-circuit conductor member 3. Moreover, the same effect is acquired even if the short circuit conductor member 3 is cylindrical.

Embodiment 3 FIG.
Embodiment 3 of the present invention will be described with reference to FIGS. FIG. 14 is a configuration diagram of a stacked annular patch antenna according to Embodiment 3, FIG. 14 (a) is a plan view of the annular patch antenna, FIG. 14 (b) is a cross-sectional view of the annular patch antenna, FIG. 14C is a perspective view of the short-circuit conductor member of the annular patch antenna in which the circular patch power feeding means is inserted. 14 (a), 14 (b), and 14 (c), reference numeral 9 denotes a conductive circular patch having a central axis common to the annular patch 2 and having a diameter smaller than that of the annular patch 2 and arranged opposite thereto. 10 is a dielectric plate for a circular patch provided between the circular patch 9 and the circular patch 2, 11 is a feeding point of the circular patch 9, and 12 is a short-circuit conductor member so as not to disturb the radiation pattern of the circular patch antenna. 3 is a feeding means for a circular patch inserted into the circular patch 9, the inner conductor of the signal conductor (coaxial cable) is connected to the feeding point 11 of the circular patch 9, and the outer conductor of the signal conductor is grounded and connected to the conductor plate 1. ing.

  FIG. 15 is a configuration diagram of a stacked annular patch antenna according to the third embodiment, FIG. 15 (a) is a plan view of the stacked annular patch antenna, and FIG. 15 (b) is a cross-sectional view thereof. 15 (c), (d), (e), and (f) show that the short-circuit conductor member 12 is thick or thin-walled annular short-circuit conductor member 3, and the feeding means 12 (for example, circular patch 9) It is a short-circuit conductor member perspective view in the state where a coaxial cable) was inserted. 15 (a) and 15 (b) show the case where the projecting protrusion 7 extending in the central axis direction is formed on the side surface of the short-circuit conductor member 3, and FIGS. 15 (e) and 15 (f) show the short circuit. The case where the conductive pin 7 is mounted on the side surface of the conductor member 3 is shown.

  FIG. 16 is a configuration diagram of the stacked annular patch antenna according to the third embodiment. FIG. 16 (a) is a plan view of the stacked annular patch antenna, and FIG. 16 (b) is a stacked annular patch antenna. FIG. 16C is a perspective view of the short-circuit conductor member according to the laminated annular patch antenna in which the feeding means 12 of the circular patch 9 is inserted in the short-circuit conductor member 3. FIG. 17 is a configuration diagram of the laminated annular patch antenna according to the third embodiment. FIG. 17A is a plan view thereof, FIG. 17B is a sectional view thereof, and FIG. An annular short-circuit conductor member perspective view of the annular patch antenna, FIG. 17D is a perspective view of a through-hole-shaped short-circuit conductor member of the laminated annular patch antenna. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. Further, a dielectric may be filled in the gap between the ring and the through hole.

  A circular patch antenna is stacked on top of the annular patch antenna shown in the first and second embodiments, and a hole is provided in the short-circuit conductor member 3 as shown in FIGS. 14 (c) and 16 (c). The circular patch power supply means 12 is inserted, or inside the space of the ring or through hole as shown in FIGS. 15 (c), (d), (e), (f) and FIGS. 17 (c), (d). By inserting the circular patch power supply means 12 into the circular patch 9 and supplying power to the circular patch 9, it becomes possible to configure a laminated annular patch antenna shared by two frequencies. Alternatively, the conductor pattern provided on the top of the dielectric plate 4 and the annular patch 2 may be connected to supply power to the power supply point 5 as horizontal power supply. Furthermore, if it is necessary for the patch antennas to be stacked to radiate circularly polarized radio waves, perturbation elements such as protrusions and cutouts may be provided on the outer periphery of the circular patch 9, as described in the first and second embodiments. The circular patch antenna may be laminated.

Embodiment 4 FIG.
Embodiment 4 of the present invention will be described with reference to FIG. FIG. 18 is a configuration diagram of a reflector antenna apparatus according to the fourth embodiment. In FIG. 18, 13 is a primary radiator composed of the annular patch antenna shown in the first to third embodiments, 14 is a support column that supports the primary radiator 13, and 15 is a primary radiation that fixes the support column 14. Reference numeral 16 denotes a main reflecting mirror that reflects the radio waves radiated from the vessel and secondarily radiates it toward the space. By using the primary radiator 13, it is possible to avoid deterioration of the shape of the primary radiation pattern due to the axial ratio due to unnecessary higher-order modes and the perturbation element, so that the shape of the secondary radiation pattern radiated from the main reflector 15 is also primary radiation. As with the pattern, a good axial ratio and radiation pattern can be obtained. Further, in consideration of feeding loss and the like, a sub-reflecting mirror may be provided and the primary radiator 13 may be provided on the main reflecting mirror 15 side (not shown).

Embodiment 5 FIG.
Embodiment 5 of the present invention will be described with reference to FIG. FIG. 19 is a configuration diagram of the annular patch array antenna device according to the fifth embodiment. In FIG. 19, reference numeral 17 denotes the annular patch antenna shown in the first to fourth embodiments arranged in a matrix, 18 denotes an array dielectric plate having the patch antenna 17 provided on the upper surface, and 19 denotes the patch antenna 17 in a matrix. Arranged in the row direction, adjacent circular patch antennas in the column direction are connected to each other between adjacent columns, and the midpoint of these connections is A connection line 20 connected to each other and a power supply line 20 that feeds power to the midpoint of the connection line. By using the patch antenna 17 having a good axial ratio and radiation pattern, the composite radiation pattern of the patch antennas arranged in a matrix can also obtain a good axial ratio and radiation pattern. Further, the shape of the connection line 19 is not limited to that shown in FIG. 19, and at least the even number of the patch antennas 17 of the portions connecting the feeding points of the patch antennas 17 of the connection line 19 are symmetrical. If you are doing. Further, the patch antenna 17 may be fed not by horizontal feeding such as the feeding line 20 but by vertical feeding such as a coaxial cable. It is also possible to divide the array dielectric plate into another dielectric plate by an arbitrary unit number of patch antennas 17 so that the number of element antennas of the array antenna can be changed or the element antennas can be replaced.

It is a block diagram of the annular patch antenna according to Embodiment 1 of the present invention. It is a short-circuit conductor member perspective view of the annular patch antenna according to Embodiment 1 of the present invention. It is a correlation diagram of the inside-outside radius ratio of the annular patch which concerns on Embodiment 1 of this invention. It is an electric field distribution figure in the section of the annular patch antenna concerning Embodiment 1 of this invention. It is a radiation pattern figure by the propagation mode of the annular patch antenna concerning Embodiment 1 of this invention. It is a magnetic field distribution figure of the annular patch which concerns on Embodiment 1 of this invention. It is a block diagram of the annular patch antenna according to Embodiment 1 of the present invention. It is a short-circuit conductor member perspective view of the annular patch antenna according to Embodiment 1 of the present invention. It is the short circuit conductor member perspective view and sectional drawing of the annular patch antenna which concern on Embodiment 1 of this invention. It is a block diagram of the annular patch antenna which concerns on Embodiment 2 of this invention. It is a short circuit conductor member perspective view of the annular patch antenna concerning Embodiment 2 of this invention. It is a block diagram of the annular patch antenna which concerns on Embodiment 2 of this invention. It is a short circuit conductor member perspective view of the annular patch antenna concerning Embodiment 2 of this invention. It is a block diagram of the laminated | annular patch antenna which laminated | stacked on Embodiment 3 of this invention. It is a block diagram of the laminated | annular patch antenna which laminated | stacked on Embodiment 3 of this invention. It is a block diagram of the laminated | annular patch antenna which laminated | stacked on Embodiment 3 of this invention. It is a block diagram of the laminated | annular patch antenna which laminated | stacked on Embodiment 3 of this invention. It is a block diagram of the reflector antenna apparatus which concerns on Embodiment 4 of this invention. It is a block diagram of the annular patch array antenna apparatus which concerns on Embodiment 5 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Conductor plate, 2 ... Ring patch, 3 ... Short-circuit conductor member, 4 ... Dielectric board, 5 ... Feeding point, 6 ... Feeding means, 7 ... Projection part, 8 ... Plane part, 9 ... Circular patch, 10 ... Dielectric plate for circular patch, 11 ... Circular patch feeding point, 12 ... Circular patch feeding means, 13 ... Primary radiator, 14 ... Support pillar, 15 ... Main reflector, 16 ... Mount part, 17 ... Patch antenna, 18 ... Dielectric plate for array, 19 ... connection line, 20 ... feed line

Claims (5)

A conductor plate, an annular patch disposed opposite the conductor plate, provided between the annular patch and the conductor plate, and having a central axis of the annular patch in common and smaller than the diameter of the annular patch A cylindrical or annular short-circuit conductor member having a diameter and connected to the annular patch and the conductor plate, and a dielectric provided outside the short-circuit conductor member between the annular patch and the conductor plate A body plate, a power supply means for supplying power to a power supply point of the annular patch, and a circularly polarized radio wave from the circular patch by the power supply of the power supply means. An annular patch antenna having a protruding portion that protrudes outward on a side surface and that is provided at a symmetrical position with respect to the central axis of the annular patch. The annular patch antenna according to claim 1, wherein the protrusion is a conductive pin. A conductor plate, an annular patch disposed opposite to the conductor plate, provided between the annular patch and the conductor plate, connected to the annular patch and the conductor plate, and a central axis of the annular patch A plane in a state where a side surface symmetrical to the central axis of the annular patch is cut out in the direction of the central axis on a cylindrical or annular side surface having a diameter smaller than the diameter of the annular patch in common A short-circuit conductor member forming a portion, a dielectric plate provided outside the short-circuit conductor member between the annular patch and the conductor plate, and a power supply means for supplying power to a power supply point of the annular patch, An annular patch antenna configured to radiate circularly polarized radio waves from the annular patch by power feeding from the power feeding means. A conductor plate, an annular patch disposed opposite to the conductor plate, and provided between the annular patch and the conductor plate; connected to the annular patch and the conductor plate; and a center of the annular patch Protruding portions are formed on side surfaces symmetrical with respect to the central axis of the annular patch on a cylindrical or annular side surface having a diameter smaller than the diameter of the annular patch with a common axis, or the center A short-circuit conductor member formed with a flat surface in a state cut out in the axial direction, a first dielectric provided between the annular patch outside the short-circuit conductor member and the conductor plate, on the annular patch A circular patch having a diameter smaller than the diameter of the annular patch and larger than the diameter of the short-circuit conductor member with respect to a central axis common to the annular patch, the circular patch and the annular ring Second invitation between the patch Body, first feeding means that feeds the circular patch through the conductor plate and the first dielectric and radiates circularly polarized radio waves, and the short-circuit conductor member. An annular patch antenna comprising a second feeding means for feeding the circular patch through the inside. A conductor plate, an annular patch disposed opposite the conductor plate, provided between the annular patch and the conductor plate, and having a central axis of the annular patch in common and smaller than the diameter of the annular patch A cylindrical or annular short-circuit conductor member having a diameter and connected to the annular patch and the conductor plate, and provided outside the short-circuit conductor member between the annular patch and the conductor plate Having a dielectric plate, and feeding circularly polarized radio waves from the annular patch by supplying power to the annular patch, with respect to the central axis on the side surface of the cylinder or the annular of the short-circuit conductor member Protrusions or cutouts are formed at symmetrical positions, circular patch antennas that radiate circularly polarized radio waves, and the circular patch antennas are arranged in a matrix. Arranged in rows In adjacent columns, adjacent circular patch antennas in the column direction are connected to each other between adjacent columns, and a connection line that connects the midpoints of these connections to each other, and a power feed that feeds the midpoint of this connection line An annular patch array antenna device comprising a track.

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