KR100287066B1 - Spherical dipole antenna - Google Patents

Abstract

PURPOSE: A spherical dipole antenna is provided to accomplish convenience of disassembling and assembling semisphere by dividing a semiconductor into a cover plate coupled to an inner conductive plate, and a separable upper housing. CONSTITUTION: A spherical dipole antenna comprises an insulating dielectric plate, a lower conductive plate(11), a lower housing(8), an electronic circuit, an upper conductive plate(10), a semisphere upper housing(6), a cover plate(7), and power switch. The lower and the upper conductive plates are attached under and on the dielectric plate, respectively. The upper conductive plate(11) accepts the electronic circuit. The semisphere upper housing(6) is coupled to the upper conductive plate(10) and has many center openings. The cover plate(7) seals the openings of the semisphere upper housing(6) and has many openings. The power switch is allocated at one of the openings of the cover plate(7) for controlling internal power of the electronic circuit manually.

Description

Spherical dipole antenna

The present invention relates to a spherical dipole antenna which can obtain ease of use and efficiency while maintaining the symmetry of the radiation pattern by using an optical connection that does not affect the conductive cable that transmits a signal to a radiator that radiates electromagnetic waves.

In general, the spherical dipole antenna implemented using the optical connection can prevent the distortion of the radiation wave, and thus can repeatedly generate a certain type of radiation wave. In measurement experiments in which a certain type of radiation wave is repeatedly generated, such as a shielding effect measurement of an enclosed structure or an electromagnetic interference measurement facility, an antenna for generating a certain type of radiation wave without distortion by an excitation line as described above is required. .

In order to realize this, conventionally, a spherical dipole antenna is implemented as a spherical antenna having no inner conductor plate, and a signal is used to excite the signal through a metal rod connected to both poles. See G. Koepke et. al, Standard Spherical Dipole Source, National Inst. Of Standard and Technology, Boulder, CO., NIST TN 1351, December 1991

When the high frequency signal is excited in such a structure, there is a disadvantage in that a symmetrical radiation pattern cannot be formed because the signal cannot be uniformly distributed on the equator plane of the spherical dipole due to the internal structural characteristics. In addition, there is a structural problem that the symmetrical radiation pattern is deteriorated by allowing the cable connected to the outside to pass through the hole located on the equator.

Thus, in order to form a uniform current distribution on the equator in the high frequency region, a spherical dipole antenna using an inner conductor plate and connected to the outside through the pole portion was invented. However, the spherical dipole antenna using the inner conductor plate was able to be used for high frequency signals, but the usable internal space was reduced and several optical cables connected to the outside were used. And optical cable was not separated, so it was inconvenient to use.

Therefore, in order to solve the above problems, the object is to implement the convenience of disassembly and assembly by dividing the hemispherical surface on which various parts are disposed into a cover plate connected to the inner conductor plate and a detachable upper housing through a support. In addition, the following advantages can be obtained.

First, since the optical cable for transmitting the optical signal is separated from the old dipole antenna, the efficiency of use and convenience of storage are increased.

Second, the space utilization is improved by reducing the number of cables used to one and implementing the switch used to control the power as a simple general push-pull switch instead of an optical switch, thereby simplifying the configuration of the circuit disposed inside.

Third, the current on the antenna surface, which determines the radiation pattern of the radiated electromagnetic waves, has a maximum distribution at the equator and a minimum distribution at the poles. Due to these characteristics, the influence of the radiation pattern can be minimized by symmetrically setting the positions of the holes where the LEDs used when displaying the power state inside the antenna and the switches for controlling the power are arranged at the poles. have.

The present invention for achieving the above object is a disk-shaped conductor plate consisting of a dielectric plate and the upper and lower conductor plates coupled to the upper and lower portions of the dielectric plate, a hemispherical lower housing coupled to the lower conductor plate, and the upper A hemispherical upper housing coupled to the conductor plate, the opening being formed in the center thereof, a cover plate sealing the opening of the upper housing, and having a plurality of openings formed therein, and an optical connector assembly mounted to the opening of the cover plate; And an optical / electric conversion means mounted on the upper conductor plate and connected to the optical connector assembly.

1 is a configuration diagram for generating electromagnetic radiation by using a spherical dipole antenna according to the present invention.

2 is a schematic diagram of a radiator of a spherical dipole antenna according to the present invention;

3 is a plan view and a cross-sectional view of a cover plate according to the present invention.

Figure 4 is an interior layout of the spherical dipole antenna according to the present invention.

5 is a configuration diagram of a spherical dipole antenna according to the present invention.

<Description of Signs of Major Parts of Drawings>

1: spherical dipole antenna generating radiation

2: All-optical converter converts electrical signals into optical signals

3: signal generator

4: Optical cable for transmitting the optical signal obtained from the all-optical converter to the antenna

5: Conductive cable to transfer the electrical signal obtained from the signal generator to the electro-optical converter

6: detachable upper housing of spherical dipole antenna

7: Fixed cover plate of spherical dipole antenna

8: Lower housing of spherical dipole antenna

9: Insulator plate to insulate the upper and lower housings of the spherical dipole antenna

10: upper inner conductor plate on which inner circuit is arranged

11: Lower inner conductor plate to transmit a signal to the lower housing

12: hole for connecting the adapter of the optical connector for connecting the optical cable connected to the outside

13: A hole and a spare hole used to connect an LED that transmits a battery status to the outside, a power control switch, and a connector for charging an internal battery.

14: hole and screw groove for connecting the connector for supplying a signal to the antenna

15: Screw groove for fixing the support for fixing the electronic circuit board and the cover plate

16: groove for securing the space for internal battery

17: sloped surface for increasing the contact area between the cover plate and the upper housing

18: substrate for implementing the necessary electronic circuits inside

19: support for fixing the electronic circuit board

20: Nut for connecting the support for fixing the electronic circuit board to the inner conductor

21: dielectric support for fixing the cover plate

22: nut for connecting the dielectric support for fixing the cover plate

23: Optical connector for transmitting the optical signal to the optical / electrical converter disposed inside the antenna

24: Optical connector adapter for connecting the optical connector inside and outside the antenna

25: Optical connector for transmitting the optical signal of the all-optical converter outside the antenna to the antenna

26: battery for supplying power inside the antenna

27: connector for supplying an electrical signal to the antenna

28: LED to transmit battery status to outside, power control switch, internal battery charging connector

29: optical / electric converter

In the present invention, the use of an optical signal as a cable for supplying a signal to an antenna is to prevent distortion caused by radiation caused by the current induced in the conductive cable affecting the radiation wave. The use of a spherical dipole antenna as an antenna used as a radiator is because a constant radiation pattern having symmetry can be obtained while providing an internal space necessary to implement a circuit for recovering an optical signal into an electrical signal.

Spherical dipoles using optical connections have many limitations in manufacturing. All components required for the construction of the opto-electric converter must be placed in a confined space inside the antenna and there must be no connection with a conductive cable to the outside, so a battery must be used inside.

In order to overcome manufacturing limitations, the larger the internal space is, the more advantageous it is. However, since a spherical dipole antenna is often used to model an ideal source of radiation, a small volume is required for operation. Electrically, the higher the frequency of the radiation, the smaller the sphere should be. Due to the above characteristics, the spherical dipole antenna usable in the high frequency range needs to be miniaturized and integrated.

In order to use the old dipole antenna, it is necessary to minimize the number of cables connected to the antenna and to separate the cables from the antenna. This is because in many cases, the posture of the copying body is changed and the position is moved during use. Even when storing, it is difficult to store with a long cable connected. Spherical dipoles should be constructed so that they can be easily disassembled and assembled. This is because the radiator constituting the spherical antenna is made of a conductive material, so the internal state cannot be checked from the outside, so if necessary, the user needs to disassemble the internal state.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram for generating radiated electromagnetic waves using a spherical dipole antenna using an optical connection.

The electrical signal generated by the signal generator 3 is input to the electro-optical converter 2 through the conductive cable 5 and converted into an optical signal. The optical signal obtained from the pre / optical converter 2 is transmitted to the spherical dipole antenna 1 via the optical cable 4, and then restored to an electrical signal from the opto-electric converter disposed inside the antenna, and then to the surface of the antenna. Is transmitted to generate radiation waves to the outside. If the length of the optical cable that transmits the optical signal is placed outside the experimental space to generate electromagnetic waves, the optical space (4) is located in the experimental space. The distortion of the wave can be prevented.

2 is a structure of a spherical dipole antenna manufactured to implement the above function, and is composed of two hemispheres divided into a cover plate 7 and an upper housing 8 and a lower housing 8, each hemisphere being an equatorial plane It is insulated by a dielectric plate 9 located at. In addition, the upper hemisphere of the two hemispheres constituting the spherical dipole antenna is configured by separating the cover plate (7) on which the various components are installed and the detachable upper housing (6).

The dielectric plate 9 serves to electrically insulate the upper housing 6 and the lower housing 8, and has a groove 14 to which a connector can be connected at the center, and both sides of the dielectric plate 9 are strongly adhesive. The upper inner conductor plate 10 and the lower inner conductor plate 11 are bonded to each other so that the organic current supplied through the central connector is uniformly distributed on the equator plane.

The lower housing 8 is connected to the lower inner conductor plate 11 which is in contact with the lower surface of the dielectric plate by using a screw groove in the corner portion.

The cover plate 7 is located at the pole portion of the spherical dipole antenna, and includes a hole 12 through which an optical cable 5 connected to the outside passes and a hole in which components used for information transfer necessary for controlling state inside are disposed. (13) is open hemisphere. The cover plate 7 is fixed to the inner conductor plate 10 of the spherical dipole using supports and nuts made of dielectric.

The upper housing 6 is connected to the screw grooves of the corner portions of the cover plate 7 located at the pole portion and the upper inner conductor plate 10 in contact with the upper surface of the dielectric plate 9. In addition, the upper housing 6 is rotated and fixed to the screw groove of the inner conductor plate, thereby forming a complete hemisphere with the cover plate 7. The upper housing 6 can be separated from the cover plate 7 and can be separated and observed inside when it is necessary to check the internal state of the spherical dipole antenna.

The upper inner conductor plate 10 has a screw groove and a hole 14 so that a connector for supplying current to the antenna is connected at the center thereof, and a screw groove 15 necessary for fixing an electronic circuit board disposed inside the antenna, and It is easy to implement a variety of functions to be installed in the antenna by making a groove (16), etc. necessary to fix the battery disposed in the. In addition, on the equator plane of the spherical dipole antenna, inner conductor plates are placed in the upper housing and the lower housing, respectively, so that a constant voltage is induced.

FIG. 3 shows a cover plate, and FIG. 3 (a) is a plan view of the cover plate, and FIG. 3 (b) shows a cross-sectional view of the cut-out portion X1-X2 of FIG. 3 (a).

As shown in FIG. 3 (a), the cover plate 7 is a portion that serves as a passage required for connecting the inside and the outside of the antenna, and the hole 12 through which the adapter for the optical connector required to transmit the optical signal passes. And a symmetrical structure, such as a switch for controlling the internal power of the antenna, a connector for charging the internal battery, a status LED indicating the discharge state of the power supply, and a spare hole for granting additional functions if necessary by the user. Holes 13. Since the radius of the optical connector generally used is larger than that of the LED lamp, it is located at the center and the other holes are symmetrically disposed about the optical connector hole 12.

As shown in FIG. 3 (b), the cover plate 7 has an inclined surface 17 at the corner portion in contact with the upper housing 6 to maximize the contact surface to minimize the electrical resistance of the two separate hemispheres. do.

4 shows a method of fixing the cover plate 7 and the substrate 18 disposed inside the antenna to the upper inner conductor plate 10.

The electronic circuit board 18 is a part for converting an optical signal into an electrical signal and installing a circuit for controlling an internal power source. The electronic circuit board 18 is provided in the screw groove 15 of the upper inner conductor plate 10 by using the substrate support 19. The upper inner conductor plate 10 is fixed using a bolt 20 so as to create a predetermined space. This ensures a space in which the connector connected to the center of the upper inner conductor plate is disposed, and makes it possible to arrange components on both sides of the substrate, thereby effectively utilizing the inner space.

The cover plate 7 is fixed to the upper part of the substrate support 19 with a bolt 22 using the cover plate support 21 made of an insulator. Through the above process, both the cover plate 7 and the electronic circuit board 18 are fixed to the upper inner conductor plate 10.

The optical connector 23 connected to the photoelectric converter inside the antenna is connected to the adapter 24 and fixed to the cover plate 7.

The optical connector 25 for transmitting the optical signal from the outside is connected to the adapter 24 to transmit the optical signal to the antenna. The optical connector 25 outside the antenna is convenient to move or fix the antenna because it is convenient to connect or disconnect the adapter.

Here, the optical connector 23 for transmitting the optical signal to the optical / electrical converter disposed inside the antenna, the optical connector 25 for transmitting the optical signal of the / optical converter outside the antenna to the antenna, the inside and outside of the antenna The combination of an optical connector adapter 24 for connecting an optical connector and an LED for transmitting a battery status to the outside, a power control switch, and an internal battery charging connector (not shown) is called an optical connector assembly.

FIG. 5 is a configuration diagram in which the fixed portion of the antenna is separated from the upper housing 6 and the external optical cable 4 is connected to the antenna, and shows a coupling diagram between the portions constituting the spherical dipole.

The insulating dielectric plate 10 is a strong adhesive, and is bonded to the upper inner conductor plate 10 on the upper surface and the lower inner conductor plate 11 on the lower surface, respectively. The lower housing 8 is connected using the lower inner conductor plate 11 and the screw groove of the corner portion. The cover plate 7 and the electronic circuit board 18 and the like are connected as shown in FIG. 4, and the battery 26 is fixed to the groove 16 located in the upper inner conductor plate and supplies a current to the antenna. 27 is fixed to the groove 14 in the center of the inner conductor plate. The LED, which transmits the battery status to the outside, the power control switch and the internal battery charging connector 28 are used to grasp the internal state of the antenna from the outside and are fixed to the groove 13 of the cover plate 7. The photoelectric converter 29 converts an optical signal transmitted to an antenna into an electrical signal and is located on the upper center plane of the electronic circuit board 18.

The photoelectric conversion means consists of a battery 26, a connector 27, a substrate support 19, an electronic circuit board 18 and an optical / electric converter 29.

The problem with the limited internal space here is the battery that supplies power. Batteries are relatively bulky and require maximum utilization of internal space. In order for the excitation signal to be uniformly distributed on both sides of the inner conductor plate, the surface of the surface of the dielectric plate in contact with the equator should be uniform. However, in the case of the surface on which the component is located, even if the surface is discontinuous, the characteristics are not affected, so the component surface of the inner conductor plate is used for arranging the battery or the like by making the groove 16 in the required portion.

As described above, the spherical dipole antenna proposed in the present invention includes a cover plate 7 and an upper housing 6 on upper and lower inner conductor plates 10 and 11 connected to both sides of the dielectric plate 9 located on the equator plane. The lower housing 8 is connected to various internal parts to complete the entire fixing part. The upper housing 6 is connected to the screw groove at the edge of the upper inner conductor plate 10 of the entire fixing portion to form a full spherical dipole antenna. The cover plate 7 and the upper housing 6 and the lower housing are insulated with a dielectric plate on the equator to form a spherical dipole antenna, and the optical connector 23 connected to the outside is connected to an optical connector adapter on the cover plate 7 ( 24) can be connected or disconnected.

As described above, the present invention reduces the internal space required when using an optical switch by changing the power control switch to a general push-pull switch, and maintains a constant distance from the upper inner conductor by supporting an electronic circuit board disposed inside the antenna. To make room for the double-sided board. In addition, by making a local groove in the inner conductor plate, the battery installation space can be expanded to make the most of the limited internal space. Maximizing the utilization of the internal space of the antenna can produce a small spherical dipole antenna, thereby extending the frequency of the usable signal. The upper hemisphere of the spherical antenna can be easily separated and assembled by using two of the cover plate and the upper housing, so it is easy to check the status of the inside of the antenna, and an adapter for connecting an optical cable to the pole part is connected to the outside. Emphasis on the convenience of the optical cable connection can be obtained for ease of use and storage efficiency.

The invention described above can be expected to have an excellent effect in extending the ease of use and the frequency of use while providing a tool necessary for various accurate measurements by producing a source of electromagnetic waves without the influence of the conductive cable.

Claims (3)

In the spherical dipole antenna, Dielectric plate, A lower conductor plate coupled to the lower portion of the dielectric plate, A hemispherical lower housing coupled to the lower conductor plate; An electronic circuit for supplying internal power of the spherical dipole antenna, receiving an optical signal, converting the optical signal into an electrical signal, and copying the electrical signal through the antenna; An upper conductor plate coupled to an upper portion of the dielectric plate and having a groove formed on an upper surface thereof to allow a portion of the electronic circuit to be inserted therein; A hemispherical upper housing coupled to the upper conductor plate and having a plurality of central openings; A cover plate sealing the opening of the hemispherical upper housing and having a plurality of openings; A power switch installed in any one of a plurality of openings of the cover plate to enable internal power control of the electronic circuit manually by a user; An all-optical converter for converting an electrical signal into an optical signal from an externally provided signal generator; An adapter installed in one of a plurality of openings of the cover plate and connecting between the optical connectors; A first optical connector positioned at an end of the optical cable for transmitting the optical signal from the all-optical converter and connected to one side of the adapter; And a second optical connector positioned at an end of the optical cable for transmitting the optical signal to the electronic circuit, the second optical connector being connected to the other side of the adapter. The method of claim 1, Spherical dipole antenna further comprises a light emitting element installed in any one of the plurality of openings of the cover plate to guide the state of the internal power supply. The method of claim 1, The cover plate is a spherical dipole antenna, characterized in that the edge portion in contact with the upper housing made of an inclined surface.

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