KR101949134B1 - Apparatus for measuring antena radiation pattern using a rotary encorder - Google Patents

Abstract

An omni-directional antenna radiation pattern measurement apparatus using a rotary encoder is disclosed. The measuring device includes a lower receiving portion fixedly supported on the floor, a hollow mast provided in a vertical direction with respect to a central portion of the lower receiving portion, a rotating device provided at the upper end of the mast, a vertical rod coupled to the upper portion of the rotating device, A horizontal bar that is horizontally coupled to the upper side of the goniometer, a first mounting part that is vertically slidably inserted into the vertical bar through the upper end of the vertical bar and on which the test antenna is mounted, A vertical bar coupled to one end of the horizontal bar, a rotary encoder sensing part coupled to the vertical bar, and a support bar having one end coupled to the horizontal bar and the other end coupled to the housing.

Description

TECHNICAL FIELD [0001] The present invention relates to an antenna radiation pattern measurement apparatus using a rotary encoder,

The present invention relates to an antenna radiation pattern measuring apparatus, and more particularly, to an antenna radiation pattern measuring apparatus for measuring an antenna radiation pattern using a rotary encoder capable of manually measuring an antenna radiation pattern while rotating a center of a front surface of an antenna opening vertically, To an antenna radiation pattern measurement apparatus.

Generally, an antenna is a device that can emit or receive electromagnetic energy. An ideal transmitting antenna receives power from a source and emits it into space. Electromagnetic energy does not return unless it is radiated from the antenna and reflected or dispersed.

However, the actual antenna produces both radiating and non-radiating electromagnetic field elements. An example of a non-radiating electromagnetic field element would be a portion of the received power returning to the source or otherwise dissipated in the resistive load.

The performance of an antenna can be described in several ways.

First, the radiation efficiency of the antenna can be defined as a ratio of the amount of power radiated by the antenna to the amount of power received by the antenna. Some of the power received by the antenna but not radiated may be dispersed in the form of heat.

Second, the antenna directivity is defined as the ratio of the radiant intensity in a given direction to the uniform radiant intensity in all directions, with the ability of the antenna to concentrate the electromagnetic energy in a specific direction and is directly related to the radiation pattern.

Third, the antenna gain is defined as the ratio of the relative intensity to the isotropic pattern with respect to the direction of the maximum electric field. These are mainly defined as important characteristics of antennas for broadcasting communication or data transmission.

On the other hand, an antenna factor is an important characteristic of a measurement antenna for measuring electromagnetic interference (EMI) and equivalent isotropic radiated power (EIRP) of a radio device. This is defined as the ratio of the intensity of the electric field entering the antenna element to the voltage induced in the antenna open circuit. The antenna characteristics described above have a certain relationship with the antenna pattern measurement.

However, in order to measure the condition to satisfy these conditions, it is impossible to adjust the height according to the international standard of the antenna measurement method and it is impossible to mount a heavy antenna. Therefore, there is a problem that can be applied to only some antennas such as a horn antenna.

In addition, the conventional manual measuring device is capable of measuring in 10-degree increments, and the angle is adjusted by the naked eye of a human, so that there is a problem that the measurement accuracy is remarkably deteriorated.

In addition, there is a problem that it takes a lot of time because people have to be avoided as an electromagnetic shielding facility after adjusting the angle of the measurement at the outdoor test site.

Korean Registered Patent No. 10-0687908 (Feb. 27, 2007)

It is an object of the present invention to provide an outdoor antenna pattern measuring apparatus of 2 m or more in order to comply with an international standard measurement method.

Another object of the present invention is to ensure reliability and convenience of measured values by allowing the azimuth angle of the antenna to be measured by the controller in units of 1 degree in 360 degrees.

It is still another object of the present invention to provide an excellent antenna radiation pattern measurement apparatus using a rotary encoder that can be effectively applied to an antenna radiation pattern measurement apparatus and can easily ensure operation stability and measurement reliability.

The antenna radiation pattern measuring apparatus according to the present invention for this purpose comprises: a lower receiving part fixedly supported on a floor; A hollow mast installed in a vertical direction with respect to a center portion of the lower receiving portion; A rotating device provided at an upper end of the mast; A vertical bar coupled to the upper portion of the pivoting device; A goniometer coupled horizontally above the vertical bar; A horizontal axis positioned above the goniometer and horizontally coupled to the upper portion of the goniometer so as to be rotatable in both forward and reverse directions; A first mounting part on which a test antenna is mounted on an upper surface of the vertical rod, the length of which is adjusted in a vertical direction while being slidably inserted into the vertical rod; A vertical axis coupled vertically through one end of the horizontal axis; An angle measuring encoder or a rotary encoder sensing unit coupled to the vertical axis and measuring an angle of the goniometer; And a support bar having one end coupled to the horizontal axis and the other end coupled to the housing of the lower support.

In addition, the lower receiving portion includes a base plate having a plurality of conveying wheels on a bottom surface of a circular or polygonal plate shape, and a pair of legs having one end hinged to the base plate, And a housing which is installed in a cylindrical vertical direction in which an upper surface is opened at a central portion of an upper surface of the base plate.

In addition, the legs may have a plurality of holes formed at regular intervals in the longitudinal direction, and the length of the legs may be varied by attaching / detaching the bottom fixing lever detachably coupled to the holes.

The housing may further include a height adjusting lever provided at one side of the rectangular tubular structure having an opened upper surface to accommodate the mast and a fixing bolt for fixing the mast whose height is adjusted by the height adjusting lever .

Further, the height adjusting lever is engaged with the mast in a gear-type or wire-like manner.

Further, the pivoting device is characterized in that the pivoting device is capable of measuring at an angle with an accuracy of less than 1 degree when rotated by 360 degrees when the goniometer linked with the vertical bar is rotated by a predetermined angle under the control of a controller.

The test antenna mounted on the upper surface of the first mounting part may be any one of a log-periodic antenna, a biconical antenna, and a horn antenna.

The support bar may include a first support bar hinged to one end of the horizontal shaft in an oblique direction and having a plurality of holes at regular intervals in the longitudinal direction, A second support bar having a plurality of connection holes at a position where the center of the hole is aligned with the hole in the direction of the first support bar, a hole in the first support bar, and a connection pin, .

Further, the above-mentioned goniometer is characterized in that the central portion is folded in half.

According to another aspect of the present invention, there is provided an apparatus for measuring an antenna radiation pattern, including: a lower receiving part fixedly supported on a floor; A hollow mast installed in a vertical direction with respect to a central portion of the lower receiving portion; A height regulating lever provided on one side of the housing of the lower receiving part and having a rectangular tubular structure opened to accommodate the mast, the height adjusting lever adjusting the height of the mast by wire or gear engagement with the mast; A rotating device provided at an upper end of the mast; A vertical bar coupled to the upper portion of the pivoting device; A rotary type goniometer coupled horizontally so as to be rotatable between a vertical bar and the rotary device; A rotary encoder sensing unit coupled to the goniometer so as to measure an angle of the goniometer; A horizontal bar having one end joined to the vertical bar at the upper side of the goniometer and extending horizontally at an upper portion of the goniometer; A support bar having one end rotatably coupled to the housing in a vertical direction and the other end being adjusted in a direction perpendicular to the other end of the horizontal axis; A first mounting part on which a test antenna is mounted on an upper surface of the vertical rod, the length of which is adjusted in a vertical direction while slidingly inserted into the vertical rod through an upper end of the vertical rod; And a vertical bar coupled to the horizontal bar and supporting the rotary encoder sensing unit. The height of the rotary encoder is adjusted according to the height change of the mast by adjusting the length of the support bar.

According to another aspect of the present invention, there is provided an apparatus for measuring an antenna radiation pattern using a rotary encoder, including: a base plate; a plurality of A lower pedestal portion having legs; A mast that is coupled to an upper portion of the lower pedestal and whose height is adjusted; A height adjusting lever coupled to a side surface of the mast and adjusting a height of the mast; A rotating device detachably fitted to an upper end of the mast; A slit disk rotating at an upper end of the rotating device about a center axis of the mast according to an operation of the rotating device; An auxiliary disk spaced from the lower side of the slit disk in a height direction of the mast and rotated at a lower end of the rotating device with the mast as a central axis; A support detachably coupled to the mast and extending outward from the slit disk and the auxiliary disk at the mast; And a rotary encoder sensing unit coupled to the support unit and disposed adjacent to the outer edge of the slit disk to measure light on the slit disk and measure a rotation position or a rotation angle of the slit disk through light passing through the slit, And a test antenna is mounted on the upper end of the mast protruding to the upper portion of the rotating device.

In one embodiment, the support includes: a horizontal bar detachably coupled to an upper end of the mast; A support bar hinged to a lower end of the mast in a detachable manner and hinged to the other end of the horizontal bar movably and removably at the other end thereof and adjusted in length according to a height of the mast; And a vertical bar coupled to the horizontal bar, wherein the rotary encoder sensing portion couples to the vertical bar.

In one embodiment, the omni-directional antenna radiation pattern measurement apparatus further includes a rotation device controller connected to the rotation device and controlling a rotation range of the rotation device.

In one embodiment, the omnidirectional antenna radiation pattern measurement device further comprises a computing device connected to the rotary device controller via a communications subsystem.

As described above, according to the antenna radiation pattern measuring apparatus of the present invention, there is an effect of supplying an outdoor antenna pattern measuring apparatus of 2M or more in conformity with the international standard measuring method.

In addition, the azimuth angle of the antenna can be precisely measured in units of 1 degree in 360 degrees by the controller, thereby ensuring the reliability of the measured value and convenience.

In addition, in order to precisely control the azimuth angle of the antenna using a rotary encoder, a rotary encoder is disposed adjacent to the slit disk by an auxiliary disk which is paired with the slit disk to be spaced to support the slit disk, It is possible to improve the operational stability of the battery. Particularly, there is an advantage that a stable test operation can be performed even when a relatively large and heavy outdoor test antenna is mounted on the upper end of the mast.

Also, the mounting position of the rotary encoder sensing unit can be easily changed by adjusting the height of the support portion according to the height change of the mast. The body part can be easily detached from the mast and the legs of the lower part can be folded to facilitate the transportation and storage of the components of the rotary encoder and the support part.

1 is a perspective view illustrating an antenna radiation pattern measurement apparatus according to the present invention,
Fig. 2 is a view for enlarging the line "A" in Fig. 1 for two embodiments,
3 is an enlarged view of the line "B" in Fig. 1,
4 is an enlarged view of the line "C" in Fig. 1,
FIG. 5 is a perspective view showing the folded state of the remaining components after separating the test antenna, the rotary encoder, and the support from the antenna radiation pattern measurement apparatus of FIG.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms related to "comprising "," having ", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless otherwise defined herein, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted in a manner consistent with the contextual meaning of the related art, and are not to be construed as ideal or overly formal, unless explicitly defined herein.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an antenna radiation pattern measurement apparatus according to the present invention, FIG. 2 is a view of two embodiments showing an enlarged line "A" of FIG. 1, and FIG. 3 is a cross- Fig. 4 is an enlarged view of the line "C" in Fig. 1, Fig. 5 is a cross-sectional view of the antenna radiation pattern measurement apparatus of Fig. 1 in which the test antenna, the rotary encoder, Fig.

1 to 3, an omni-directional antenna radiation pattern measurement apparatus (hereinafter simply referred to as "measurement apparatus") 10 using a rotary encoder according to a preferred embodiment of the present invention includes a lower receiving unit 100, A vertical bar 300, a goniometer 400, a horizontal axis, a first mounting portion 600, a second mounting portion 700, and a supporting bar 800. The first mounting portion 200, the rotating device 250, the vertical bar 300, Further, the measuring apparatus 10 includes a height adjusting lever 133 and a rotary encoder sensing section (see 730 in FIG. 3).

Here, the lower receiving portion 100 and the mast 200 may be referred to as lifts. Pivoting device 250 may be replaced by a rotating device and may be referred to as rotating device 250. The goniometer 400 may be referred to as a rotating disc and may include a slit disc 410 and an auxiliary disc 420. The horizontal axis may be referred to as horizontal bar 500. The first mounting portion 600 may be located at the upper end of the mast 200 and may include the upper end of the mast 200 for mounting the test antenna. The second mounting portion 700 may include a rotary encoder sensing portion fixing means 720 coupled to the vertical axis 710 and the vertical axis 710. Vertical axis 710 may be referred to as vertical bar 710. The horizontal bar 500, vertical bar 710 and support bar 800 may be referred to as supports.

The antenna radiation pattern measuring device according to the present invention comprises a fiber reinforced plastic (FRP), a glass fiber reinforced plastic (FRP), a bakelite, a kind of artificial plastic, It is preferable that it is made of a non-metallic material which does not substantially receive the influence of propagation or radio wave reflection, such as an MC (mono cast) material.

The lower receiving portion 100 includes a base plate and a plurality of legs which are coupled to the base plate so as to be folded upward. The lower receiving portion 100 may include a base plate 110, legs 120, and a housing 130. Here, legs correspond to legs and can be referred to as legs. The lower receiving portion 100 may have a proper weight in consideration of the mechanical stability of the measuring apparatus 10. [

The base plate 110 has a rectangular frame structure. The lower side of the base plate 110 is provided with a conveying wheel 111 for facilitating the movement thereof.

As shown in FIG. 1, when the leg 120 is used in its unfolded state but is not used, the leg 120 has a hinge structure in which one end is hinged to the centers of the respective sides of the base plate 110, So that it can be stored easily.

The legs 120 are provided with a plurality of holes 122 formed at regular intervals in the longitudinal direction and include a bottom fixing lever 121 that is movably or detachably installed at any one of the holes 122 , The installation position of the lower pedestal 100 can be varied through the floor fixing lever 121.

The housing 130 is installed in a vertical direction at the center of the upper surface of the base plate 110 and may have a rectangular tubular structure whose upper surface is opened to accommodate at least a portion of the mast 200.

A height adjustment lever 131 is provided on one side of the housing 130 to facilitate adjustment of the length or height of the mast 200. The height adjusting lever 131 is not limited to the housing 130 but may be provided on the side of the mast 200 or on the sides of the housing 130 and the mast 200.

The mast 200 is coupled to the lower receiving portion 100 through the housing 130 and has a structure capable of adjusting the height. 3 (a) and 3 (b), the height adjusting lever 131 is connected to the mast 200 by a gear GR or a wire WR and is drawn upward from the housing 130 The extension length of the mast 200 can be adjusted.

The mast 200 whose extension length is adjusted can be held in a fixed state by the fixing bolts 133 provided on one side of the housing 130. The exposed or extended length of the mast 200 to the upper portion of the housing 130 in the housing 130 of the lower receiving portion 100 having such a structure can be adjusted.

The mast 200 is preferably formed in a hollow rectangular column shape and is installed in a vertical direction with respect to a central portion of the lower receiving part 100. More specifically, And the upper and lower lengths thereof, that is, the height extending to the upper portion of the housing, can be adjusted by the height adjusting lever 131 as described above.

The rotary device 250 is coupled to the upper side of the mast 200. The rotating device 250 can be detachably fitted to the upper end of the mast 200. The rotary device 250 is a component for rotating the slit disk 410 disposed between the vertical bar 300 and a slit disk 410 according to the angle set in the controller 251, So that the radiation pattern of the outdoor antenna can be accurately and easily measured. The controller 251 may be referred to as a rotator controller.

The vertical bar 300 may be installed in the upper part of the slit disk 410 in a state of being inserted into the hollow through the upper end of the mast 200. The vertical bar 300 may be installed to support the horizontal bar 500 regardless of the rotation of the rotary device 250.

The slit disk 410 has a circular plate shape, and a scale of 360 degrees is displayed so that the orientation can be known. The slit disk 410 is installed to rotate or rotate around a corresponding part of the mast 200 corresponding to the upper end of the rotating device 250 as a center axis according to the operation of the rotating device 250.

The auxiliary disk 420 is a component for suppressing or preventing the influence of the gravity direction or the shaking in the rotation or rotation of the slit disk 410. The auxiliary disk 420 is spaced apart from the lower side of the slit disk 410 in the height direction of the mast 200 and rotates about the corresponding portion of the mast 200 corresponding to the lower end of the rotating device 250, Or rotated.

The horizontal bar 500 is located on the upper side of the slit disk 410 and is coupled to the vertical bar 300 in such a manner as to extend by a predetermined length in either one of the radial directions. The extension length of the horizontal bar 500 is larger than the radius of the slit disk 410.

The first mounting portion 600 may include an antenna fixing member corresponding to the upper end of the mast 200 or being detainably fitted to the upper end of the mast. When the antenna fixing member is included, the lower portion of the first mounting portion 600 may be provided at the upper end of the vertical bar 300 so as to be pressed into the upper end of the mast 200 at a predetermined depth.

The test antenna 610 mounted on the upper end of the mast 200 by the first mounting portion 600 may be a bi-log, a log-periodic antenna, a biconical antenna, a LP (log periodic) antenna, a dipole antenna, It may be a whip antenna. The test antenna 610 may have a height of 2M or more. In this case, a jig may be attached to the upper end of the test antenna 610, and a three-axis ground wire 900 connected to the ground or the ground structure may be connected, The measuring device can be operated to ensure operational stability.

The second mounting portion 700 includes a vertical bar 710 and a rotary encoder sensing portion fixing means 720. The vertical bar 710 includes a horizontal bar 500 to vertically extend one end of the horizontal bar 500, Lt; / RTI > The rotary bar sensor 710 is coupled to the vertical bar 710 through a predetermined fixing means.

The rotary encoder sensing unit 730 has an accuracy of less than one degree of 360 degrees when the slit disk 410 of the goniometer 400 rotates or rotates by a predetermined angle by the rotation device 250, Can be measured.

A support bar 800 is provided in an oblique direction at the end of the horizontal bar 500. The support bar 800 may include a first support bar 810 and a second support bar 820 .

The first supporting bar 810 and the second supporting bar 820 are connected to each other in a longitudinal direction or in a shape in which one is inserted into the other, .

Here, the first support bars 810 include a plurality of prong holes 811 arranged in a line at predetermined intervals in the longitudinal direction, and the second support bars 820 are arranged in a line at predetermined intervals in the longitudinal direction And one of the hole 811 and the connecting hole 821 is connected to each other by a connecting pin 830. [ With this fastening structure, the length of the support bar 800 can be easily varied.

The operation and effect of the antenna radiation pattern measurement apparatus 10 according to the present invention will now be described with reference to FIG.

First, the controller 251 controls the rotating device 250 through a preset program, and the goniometer 400 is rotated or rotated by the operation of the rotating device 250. [

Next, the rotary encoder sensing unit 730 which is adjacent to the slit disk 410 of the goniometer 400 rotates when the slit disk 410 rotates by a predetermined angle, that is, when it rotates 360 degrees, to an accuracy of 1 degree or less The radiation pattern of the test antenna 610 provided in the first mounting portion 600 is precisely measured.

The controller 251 can provide the rotation device 250 with a control signal corresponding to the angle information and angle information for precisely controlling the operation of the rotating device 250. [ In addition, a program for automatically controlling the rotating device 250 may be stored, and the operation of the rotating device 250 may be automatically controlled by the program.

In addition, the controller 251 may graph the received values as a graph through spectrum analysis or network analysis control, or may store the measured values as text data in the form of CSV (comma sparated values). The CSV represents text data separated by commas.

The controller 251 described above may be connected to an external computing device 90 via a communication subsystem 80. The computing device 90 may include a processor, memory, communication device, and the like.

As described above, the measuring apparatus 10 can be folded and separated as shown in Fig. 5 by separating the test antenna, the rotary encoder, and the support portion when the measurement of the radiation pattern is completed and stored at an arbitrary place.

According to the above-described embodiment, the antenna radiation pattern measurement apparatus 10 can measure a pattern of an outdoor antenna of 2M or more in conformity with the international standard measurement method. It is possible to precisely measure the omnidirectional radiation pattern of the antenna by controlling the azimuth angle of the antenna in the unit of 1 degree in the figure and to provide the operation stability and reliability of the rotary encoder through the double disk structure of the goniometer. It is possible to ensure the reliability of the device measurement values and to facilitate the operation of the device.

It is to be understood that the present invention is not limited to the specific exemplary embodiments described above and that various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. And such modified embodiments are within the scope of the claims of the present invention.

Claims (3)

A lower support portion having a base plate and a plurality of legs coupled to the base plate so as to be folded upward;
A mast coupled to an upper portion of the lower receiving portion and having a height adjusted;
A height adjusting lever coupled to a side surface of the mast and adjusting a height of the mast;
A rotating device detachably fitted to an upper end of the mast;
A slit disk rotating at an upper end of the rotating device about a center axis of the mast according to an operation of the rotating device;
An auxiliary disk spaced from the lower side of the slit disk in a height direction of the mast and rotated at a lower end of the rotating device with the mast as a central axis;
A support detachably coupled to the mast and extending outward from the slit disk and the auxiliary disk at the mast; And
And a rotary encoder sensing unit coupled to the support unit and disposed adjacent to an outer edge of the slit disk to measure light from the slit disk and measure a rotation position or a rotation angle of the slit disk through light passing through the slit,
And a test antenna is mounted on an upper end of the mast protruded to the upper portion of the rotating device. The method according to claim 1,
The support portion
A horizontal bar detachably coupled to an upper end of the mast;
A support bar hinged to a lower end of the mast in a detachable manner and hinged to the other end of the horizontal bar movably and removably at the other end thereof and adjusted in length according to a height of the mast; And
A vertical bar coupled to the horizontal bar,
Wherein the rotary encoder sensing unit comprises:
Directional antenna radiation pattern measurement device using rotary encoder. The method according to claim 1,
And a rotating device controller connected to the rotating device and controlling a rotating range of the rotating device.

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