KR20060099308A - Log periodic antenna - Google Patents

Abstract

A logarithmic antenna having a case is disclosed. The antenna element is a symmetrical printed on both sides of the PCB substrate in a logarithmic dipole arrangement, the antenna body is coupled to one side, the first cover to cover one side of the antenna body, the first side to expose the cable connection A first cover having a groove formed therein and the other surface of the antenna body, and combined with the first cover to form a space for accommodating the antenna body therein; The second groove is formed, the second cover is formed with a fixed projection on a part, and a logarithmic period antenna including a support hole is formed on one side is inserted into the fixing projection, the support means is formed on the other side Because of its small size, it is easy to handle and install, and it can adjust the direction of antenna conveniently. Can.

DTV outdoor antenna, logarithmic antenna, array antenna, LP antenna

Description

Log periodic antenna

1 is a perspective view showing that the yagi antenna according to the prior art is installed outdoors.

2 is an exploded perspective view showing a logarithmic antenna according to an embodiment of the present invention.

Figure 3 is a perspective view showing the logarithmic cycle antenna installed outdoors according to an embodiment of the present invention.

Figure 4a is a plan view showing an antenna body according to an embodiment of the present invention.

Figure 4b is a bottom view showing the antenna body according to an embodiment of the present invention.

Figure 5a is a plan view showing an antenna case according to an embodiment of the present invention.

Figure 5b is a bottom view showing an antenna case according to an embodiment of the present invention.

Figure 6a is a perspective view showing the front of the antenna support according to an embodiment of the present invention.

Figure 6b is a perspective view showing the back of the antenna support according to an embodiment of the present invention.

7A is a perspective view showing a plane of a logarithmic antenna according to an embodiment of the present invention.

Figure 7b is a perspective view showing the bottom of the log period antenna according to an embodiment of the present invention.

8 is an enlarged view of a direction fixture of a logarithmic antenna according to an exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: antenna body 102: antenna element

104: cable connection 202: first cover

203: first groove 204: second cover

205: second groove 206: fixed projection

208: screw hole 300: support

302: fixing hole 304: flat plate

306: U bolt 308: direction fixture

The present invention relates to an antenna, and more particularly to a logarithmic antenna.

In general, there is a method of using an antenna for each television receiver, a method of using a public antenna that is used by several generations, and a method of applying for CATV provided by each region and region to watch television.

Currently, most apartments and apartments use public antennas for analog broadcast reception. However, in the case of digital broadcasting, it is difficult to receive digital broadcasting using a public antenna except for the recently constructed apartment.

In order to solve this problem, there is a need to newly install a public antenna cable and a distributor in each apartment and a general house, and accordingly, an outdoor antenna is required for watching HDTV broadcasts conveniently and economically.

In the related art of an outdoor antenna for receiving a television broadcast, a yagi antenna as shown in FIG. 1 may be substantially almost unique. Yagi antenna has the advantage of being able to receive television broadcasting in a simple structure, but in order to receive the entire broadcasting band of a digital television (DTV) of the UHF band, a plurality of antennas must be installed for each frequency band. The disadvantage is that it is inconvenient. In fact, Yagi antennas are currently manufactured by frequency band.

Yagi antenna was developed in Japan in 1926 and is widely used in the VHF and UHF bands. It is an antenna composed of a plurality of waveguides and one reflector in a linear arrangement of parasitic elements in parallel dipoles. Yagi antennas are widely used as antennas for receiving television broadcasts because of their simple structure and relatively high gain, and are now also used as public antennas for the majority of apartments and buildings.

Such Yagi antennas are limited in covering the entire UHF band with a single antenna. Currently, Yagi antennas are manufactured separately in Gwanak Mountain (470 ~ 500MHz), Yongmun Mountain (500 ~ 750MHz), and Namsan Type (750 ~ 870MHz), and the general user knows the UHF frequency used by each local broadcasting company in advance. It is necessary to purchase a suitable antenna, but it is difficult for the general public to select an antenna without expertise.

In addition, Yagi antennas are very bulky, difficult to handle, require special installation specialists for installation, take a lot of time to install, and damage the aesthetics of buildings or apartments. Therefore, there is a risk of safety accidents due to the contact with the surrounding high-voltage wires, and the electrical characteristics of the device may be degraded by the poor external environment.

In addition, when the Yagi antenna is installed outdoors, as shown in FIG. 1, there is a problem in that the direction of the antenna cannot be freely rotated 360 degrees due to interference with the building structure according to its size.

On the other hand, when the conventional indoor antenna to be installed in the outdoors, there is a problem such as waterproof problems, weathering problems due to climate change, damage due to shock, etc., there is a problem that is not good.

The present invention provides a logarithmic antenna that effectively receives a broadcast signal of a digital television and a broadband broadcast frequency of ultra high frequency (UHF).

In addition, the waterproof, weatherproof and impact resistance is strong, so it can be easily and conveniently installed outdoors, the direction of the antenna can be freely rotated, and the algebraic periodic antenna with a beautiful structure that can be friendly to the urban environment of buildings and apartments is provided. It is.

According to one aspect of the present invention, there is provided a logarithmic antenna comprising an antenna body and a case accommodating the antenna body.

The antenna main body receives a broadcast signal and inputs it to a television receiver through a feeder cable, and an antenna element is formed to be symmetrically printed on both sides of the PCB substrate in a log periodic dipole array. It is desirable to be.

The antenna main body may include an antenna feeder in an area having a short length of the antenna element, and a cable connection part for connecting to a feeder table in an area of the long length of the antenna element.

The case is formed by combining the first cover and the second cover, and when the antenna body is accommodated in the case, it is preferable that a through hole is formed in the portion corresponding to the cable connection part to expose the cable connection part.

The first cover covers one surface of the antenna body, and a first groove may be formed at one side thereof to expose the cable connection, and the second cover may cover the other surface of the antenna body and may be coupled to the first groove at one side thereof. Preferably, a second groove is formed to form a through hole through which the cable connection portion is exposed.

A portion of the second cover may be formed with a fixing protrusion coupled to the support, the fixing protrusion is preferably formed with a screw hole. In addition, a support base may be further included to stand the logarithmic antenna indoors or to be installed outdoors. A fixing hole into which a fixing protrusion formed on the second cover is inserted is formed at one end of the support, and the supporting means is provided at the other side. Can be formed.

When the support means is installed indoors, a flat plate shape is preferable, and when installed outdoors, it is preferable to include a U-bolt and the like to bind to the outdoor structure.

The outer shape of the antenna body is preferably formed in a pentagonal shape corresponding to the arrangement form of the antenna element, the first cover and the second cover constituting the case may be formed in a pentagonal shape corresponding to the outer shape of the antenna body.

In addition, there is provided an algebraic antenna including an antenna body having an antenna element printed on a PCB substrate, an antenna case accommodating the antenna body therein, and one end of which is coupled to the antenna case, and on the other end of which a support means is formed. do.

The antenna body is formed by symmetrically printing the antenna elements on both sides of the PCB substrate in a logarithmic cycle dipole arrangement. One side of the antenna body is coupled, and the antenna case covers one side of the antenna body, and one side of the antenna body is exposed. A first cover having a first groove formed therein, and covering the other surface of the antenna body, and combined with the first cover to form a space for accommodating the antenna body therein, and coupled with the first groove to expose the cable connection part. A second groove forming a hole is formed, and includes a second cover having a fixing protrusion formed on a portion thereof. A fixing hole into which the fixing protrusion is inserted is formed at one end of the support, and the supporting means includes a U bolt or a flat plate. It is desirable to.

The fixing protrusion may include a screw hole, and when the fixing protrusion is inserted into the fixing hole in one direction, the fixing protrusion may further include a direction fixing tool inserted into the screw hole through the fixing hole in the other direction.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the same reference numerals will be used for the same means regardless of the reference numerals in order to facilitate the overall understanding.

2 is an exploded perspective view showing an algebraic periodic antenna according to an exemplary embodiment of the present invention, and FIG. 3 is a perspective view showing an algebraic periodic antenna installed outdoors according to an exemplary embodiment of the present invention. 2 and 3, the antenna main body 100, the antenna element 102, the cable connection part 104, the case 200, the first cover 202, the first groove 203, and the second cover ( 204, the second groove 205, the fixing protrusion 206, the screw hole 208, the support 300, the fixing hole 302, the flat plate 304, the U bolt 306, the directional fastener 308 Is shown.

The present invention is characterized in that the antenna element 102 is formed of an antenna body 100 formed by being printed on a PCB substrate, and a case 200 for accommodating the antenna body 100. The antenna main body 100 serves to receive a broadcast signal and input it to a television receiver through a feeder cable, and more preferably, the antenna element 102 is a log periodic dipole array. It is good to print symmetrically on.

That is, the present invention relates to a Log Periodic (LP) antenna structure capable of effectively receiving a wideband digital broadcasting frequency (470 to 806 MHz), and provides convenience of mass production in the manufacturing process and uniform frequency response characteristics over a wide bandwidth. PCB printed antenna body 100 having a, a bracket-type support 300 that can easily install and maintain the antenna horizontally and the direction fixture 308 to freely adjust and fix the antenna orientation, and outdoor It is composed of a case 200 that can protect the PCB printed antenna body 100 from corrosion even in poor weather environment.

Looking at the configuration and operation effects of each element of the logarithmic antenna of the present invention as follows.

1) Antenna structure with wide frequency uniform frequency response

The general public who wants to watch digital television by adopting a logarithmic antenna structure to receive the entire UHF DTV band (470 ~ 806 MHz) with one antenna does not need to know the operating frequency of each region beforehand. There is an advantage to watching television. In particular, the logarithmic antenna element has a length of a quarter wavelength of the frequency, so that a small broadband antenna can be realized.

2) printed PCB antenna

In general, an antenna element used for a broadcast receiving antenna is used as a metal pipe (for example, aluminum or copper pipe), but it is difficult to secure uniform characteristics in manufacturing, and the cost increases in the manufacturing process. On the other hand, the antenna of the present invention adopts a PCB-printed antenna to cope with the menopausal change and is designed to meet the mass production system having uniform electrical characteristics.

In addition, since the antenna element is printed on the PCB, it is less likely to be easily deformed or damaged by an external impact, so that the antenna element can withstand transportation, handling, and installation of the product, thereby stably maintaining antenna characteristics.

3) Convenience of antenna installation and use

When an individual installs an outdoor DTV antenna, the apartment is usually installed on the veranda or on the roof, and the house is on the roof. However, in the case of the conventional outdoor antenna is installed by mobilizing the most professional personnel, the antenna support is made of a metal pipe (bracket) is difficult to handle and install. The support 300 of the antenna of the present invention is a high-strength plastic structure, and is composed of an antenna fixing support and a direction fixture for light and convenient installation, the antenna user is designed to allow installation without the need for special installation personnel.

4) PCB printed antenna protection due to poor external environment

Metallic antenna elements can be easily corroded by the external environment, and their corrosion is occurring faster in coastal areas. Therefore, in the case of the PCB printed antenna body of the present invention, since a protective film (coating) of the antenna element is formed on the printed circuit board, the PCB itself is resistant to various climate changes in outdoor environments such as temperature and humidity changes.

Secondly, a case was added to the PCB printed antenna to cope with poor external pollution and rainfall. Therefore, the antenna of the present invention can maintain electrical characteristics in a long term in any environment.

5) Beautiful structure suitable for building and apartment structure

Although the antenna of the present invention is installed to be exposed to the outside of buildings and apartments, it is an environment-friendly structure suitable for the surrounding environment due to its very small and beautiful design compared to the conventional Yagi antenna.

That is, the present invention consists of a PCB printed antenna body 100, a plastic case 200 and a fixing support 300.

The antenna main body 100 is designed as a pentagonal PCB, and the short side element covers the 800 MHz band, and the long side element covers the 470 MHz band. In addition, the feed portion of the short portion of the antenna and the cable connecting portion 104 is connected by a semi-rigid (Semi-Rigid) cable.

Plastic top and bottom PCB printed covers allow the antenna to withstand rain, snow, dust and other outdoor environments. Designed for urban environments, it can be beautifully installed on the veranda of apartments or by the windows of homes. have.

Antenna support and fixing support 300 is a high-strength plastic material is installed using a U-bolt 306 consisting of U-links and butterfly nuts, such as apartment verandas and grate of the general house. In addition, after setting the direction of the antenna, a direction fixture 308 is added to fix the antenna so that the direction is not changed by the external environment.

The logarithmic cycle antenna that accommodates the antenna main body 100 in the case 200 has a waterproof PCB and forms a waterproof jaw at the junction of the case 200, so the waterproof performance is excellent for indoor as well as outdoor use. Suitable for use as In addition, the antenna element 102 is printed on a PCB board so that the antenna body 100 formed in a slim shape is accommodated in the case 200 formed so that the antenna body 100 is accommodated so that extra space is hardly generated therein. Therefore, the aesthetic effect is excellent at installation.

When the logarithmic antenna of the present invention is installed outdoors, the temperature of various outside air acts on the antenna according to the change of season, but the heat resistance of the PCB board itself is maintained even at a high temperature, and thus the case 200 is covered. There is no problem of deformation, breakage, malfunction, etc. In addition, when the support 300 according to the present invention is installed as a bracket, the rotation is not limited by the outer wall of the building as in the conventional Yagi antenna of FIG. 1, and the 360 degree rotation is possible.

In the case of the antenna main body 100, the PCB itself is impact resistant, but if it is installed outdoors for a long time, damage due to scratching may occur even in weathering or indoors, and the impact resistance is remarkably improved by adding the case 200.

Figure 4a is a plan view showing an antenna body according to a preferred embodiment of the present invention, Figure 4b is a bottom view showing an antenna body according to a preferred embodiment of the present invention. 4A and 4B, a power feeding unit 103 and a cable connecting unit 104 are shown.

In the antenna main body 100 according to the present invention, a feeding part is formed at an end of a short length of the antenna element 102, and a length of the antenna element 102 is connected to a cable connecting part 104 for connection with a feeder table at a base. Formed. However, the logarithmic antenna of the present invention does not necessarily limit the formation positions of the feeding part and the cable connection part 104 of the antenna main body 100 accommodated in the case 200, but the antenna main body 100 of various shapes and structures. Of course, it can be configured to accommodate.

The outer shape of the antenna main body 100 is formed in a pentagonal shape or a trapezoidal shape corresponding to the arrangement of the antenna element 102, the case 200 for accommodating the antenna main body 100 to improve the practicality and appearance aesthetic antenna Corresponding to the shape and size of the main body 100 is preferably formed in a pentagonal shape or similar trapezoidal shape. However, the shape of the logarithmic antenna of the present invention is not necessarily limited to a pentagon or a trapezoid, and may be formed in various shapes according to the arrangement of the antenna elements 102 for improving antenna performance.

Figure 5a is a plan view showing an antenna case according to an embodiment of the present invention, Figure 5b is a bottom view showing an antenna case according to an embodiment of the present invention. 5A and 5B, the fixing protrusion 206 is shown.

The case 200 for accommodating the antenna main body 100 may be configured in various ways, but in this embodiment, the case 200 includes two covers covering the upper and lower portions. Among the two covers, when the upper cover is referred to as the first cover 202 and the lower cover as the second cover 204, the first and second covers 204 correspond to the shape of the antenna main body 100 accommodated therein. It is preferable to increase the aesthetic appearance effect, and a through hole is formed in a portion to be exposed to the outside of the case 200, such as the cable connection part 104 of the antenna main body 100.

The through hole may be formed in the first cover 202 or the second cover 204, and more preferably, is formed in a portion where the first cover and the second cover 204 are coupled. To this end, the first groove 203 and the second groove 205 may be formed at portions where the first cover 202 and the second cover 204 are coupled to form a through hole. Of course, a waterproof packing agent may be added to a portion where the through hole and the cable connection part 104 are in contact to improve the waterproof performance, and the waterproof packing agent is previously attached to the first groove 203 and the second groove 205. After placing the first cover 202 and the second cover 204, the through hole may be waterproofed.

Figure 6a is a perspective view showing the front of the antenna support according to an embodiment of the present invention, Figure 6b is a perspective view showing the back of the antenna support according to an embodiment of the present invention, Figure 7a is a preferred embodiment of the present invention 7 is a perspective view illustrating a bottom surface of a logarithmic antenna according to an exemplary embodiment of the present invention. 6A, 6B, 7A, and 7B, a case 200, a support 300, a fixing hole 302, a flat plate 304, a U bolt 306, and a directional fastener 308 are illustrated. have.

As such, in order to install the antenna main body 100 accommodated in the case 200 outdoors, a support 300 such as a bracket may be used. When using a bracket, a fixing protrusion 206 is formed on the lower cover to couple the case 200 to the bracket. The fixing protrusion 206 may be integrally formed with the first cover 202 or the second cover 204 and inserted into the fixing hole 302 formed in the support 300 in correspondence with the fixing protrusion 206. . However, the present invention is not necessarily limited to the configuration of the fixing protrusion 206 and the fixing hole 302 in the coupling structure between the case 200 and the support 300, various coupling structures within the scope apparent to those skilled in the art Of course it can be included.

The support 300 serves as a support when the logarithmic antenna of the present invention is placed indoors or installed outdoors, and a flat plate 304 shape or a leg portion when installed indoors on the base part, a screw hole when installed outdoors, etc. The bonding structure of is formed. In the case of indoor use, it is preferable to add a weight to the base plate 304 shape or the leg of the base part so that it can be stably erected, and a protrusion that can prevent slipping can be coupled to a part touching the bottom.

In the case of outdoor installation, the screw hole can be fixed to the building structure through a screw hole, and recently, the balcony railing installed in a house such as most apartments can be fixed using the U bolt 306.

The present embodiment is for fixing the logarithmic antenna of the present invention to a frame such as a balcony railing, and a hole is formed at an end portion of a flat plate 304, and the U bolt 306 is fixed through the hole. It is shown.

8 is an enlarged view illustrating a direction fixture of a logarithmic antenna according to an exemplary embodiment of the present invention. Referring to FIG. 8, the support 300, the fixing hole 302, and the direction fixing tool 308 are illustrated.

The fixing protrusion 206 has a screw hole 208 formed therein, and then the fixing protrusion 206 is inserted into the fixing hole 302 of the support 300, and then the direction fixing tool in a direction opposite to the insertion direction of the fixing protrusion 206. By combining the 308, it is possible to fix that the fixing projection 206 is free to rotate in the state inserted into the fixing hole (302). The direction fixing tool 308 is preferably formed of a screw of a shape corresponding to the screw hole 208 formed in the fixing projection 206.

As such, by coupling the direction fixing tool 308 by the screw to the fixing protrusion 206, the compressive force between the fixing protrusion 206 and the direction fixing tool 308 acts on the fixing hole 302 of the support 300, and thus the case The friction force between the 200 and the fixing hole 302 and the friction force between the head of the directional fixture 308 and the fixing hole 302 are increased, so that the case 200 accommodating the antenna body 100 is fixed to the support 300. It acts as a resistance to rotation about 302.

However, the present invention is not necessarily limited to the screw as the direction fastener 308 for preventing the free rotation of the case 200, using a material with a large friction force, or forming a stopper within the scope obvious to those skilled in the art It is of course possible to include various directional fixtures 308.

That is, a plurality of grooves or elastically supported protrusions are formed in the circumferential direction of the fixing protrusion 206 formed in a cylindrical shape, and elastically corresponding to the grooves or protrusions on the inner wall of the fixing hole 302 formed in a cylindrical shape. Forming a supported protrusion or groove, even if there is no screw-type direction fastener 308 as described above can prevent the case 200 from freely rotating around the fixing hole 302, the projection Or it can also serve as a stopper to rotate at a certain angle according to the formation position of the groove.

Alternatively, when the outer surface of the fixing protrusion 206 or the inner surface of the fixing hole 302 is made of a material having a large friction force such as rubber, the case 200 can be prevented from freely rotating without the direction fixing device 308 or the stopper described above. can do. In this case, since the case 200 can be fixed in a state rotated at an arbitrary angle, in a device such as an antenna, which is more important to rotate at an arbitrary angle than to rotate by a predetermined angle, it is fixed with a material having a large friction force. It is more preferable to manufacture the protrusion 206 or the fixing hole 302.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

According to the present invention having such a configuration, it is possible to receive the ultra-high frequency (UHF: Ultra High Frequency) band used for digital television with one antenna, thereby producing the same effect as combining a number of conventional Yagi antennas.

In addition, its small size makes it easy to handle and install, and it is convenient by adding an installation support with a direction fixture that can easily adjust the antenna orientation to the function of an outdoor antenna, and an antenna case that can withstand harsh external environments. It can be safely used without changing the characteristics for a long time.

In addition, the beautiful design is suitable for urban environments, and can be replaced in the future as a structure that is very suitable for the general public who is reluctant to install a conventional Yagi antenna.

Claims (3)

An antenna body in which an antenna element is printed on a PCB substrate; An antenna case accommodating the antenna main body therein; One end is coupled to the antenna case, the other end of the log cycle antenna comprising a support having a support means formed. The method of claim 1, The antenna body is formed by the antenna element is printed symmetrically on both sides of the PCB substrate in a logarithmic period dipole arrangement, the one side is coupled to the cable connection; The antenna case covers one surface of the antenna main body, and a first cover having a first groove formed at one side thereof to expose the cable connection part, and covers the other surface of the antenna main body, and is coupled to the first cover. A space for accommodating the antenna main body is formed therein, and a second groove is formed to be coupled to the first groove to form a through hole for exposing the cable connection part, and includes a second cover having a fixing protrusion formed therein. To; One end of the support is formed with a fixing hole into which the fixing projection is inserted, the support means log cycle antenna comprising a U-bolt or a flat plate. The method of claim 1, The fixing protrusion includes a screw hole; And a direction fixing tool inserted into the screw hole through the fixing hole in the other direction when the fixing protrusion is inserted into the fixing hole in one direction.

Images