KR102192449B1 - Very-small aperture terminal with Hot spot zone device for satellite communication - Google Patents

Abstract

The present invention relates to a very-small aperture terminal (VSAT) for satellite communication for a wireless hotspot. More particularly, the present invention relates to a very-small aperture terminal for satellite communication for a wireless hotspot improved in order to increase the transmission and reception efficiency by increasing the gain during transmission and reception while being able to easily and accurately perform satellite steering, skew, and, more particularly, to improve the efficiency of use of satellite frequencies by implementing a reception antenna as a dual polarized antenna. According to the present invention, the very-small aperture terminal for satellite communication for a wireless hotspot comprises: a fixture (100); fixture hinge pieces (110) fixed to both side surfaces of the fixture (100); a plate hinge piece (210) rotatably fixed to the fixture hinge piece (110) through a hinge shaft (212); an arc-shaped slot (214) formed in the plate hinge piece (210); a guide pin (220) fixed to the fixture hinge piece (110) while being inserted into the slot (214); a support plate (200) in which the plate hinge pieces (210) are vertically bent at both ends and elastic support pieces (230) are vertically bent at the lower end; and a polarized antenna barrel (300) which is rotatably assembled to the support plate (200) through a rotation shaft (310), and is rotatable about the rotation shaft (310) by mounting parts for satellite communication, and foldable about the hinge shaft (212).

Description

Very-small aperture terminal with Hot spot zone device for satellite communication

The present invention relates to a micro-earth station apparatus for satellite communication for a wireless hotspot, and more particularly, to increase transmission/reception efficiency while enabling easy and accurate satellite steering, that is, polarization (Skew), and to increase transmission/reception efficiency. The present invention relates to a micro-earth station apparatus for satellite communication for an improved wireless hotspot to improve the efficiency of use of satellite frequencies by implementing a dual polarized antenna.

In general, satellite communication is based on a broadcasting service and long distance communication.

Due to the rapid development of satellite communication technology, data, voice, and video communication using inexpensive VSAT (Very Small Aperture Terminal) networks has become possible.

This is described in "VM Dorofeev, LY Kantor VSAT applications in Russian satellite communications, International Journal of Satellite Communications, 1993, Vol 11, No 4, 223-228" and "M. Maggenti, TT Ha, T. Pratt VSAT Networks-an". overview, International Journal of Satellite Communications, 1987, Vol 5, No 3, 219-225" and "M. Maggenti, TT Ha, T. Pratt VSAT Networks-an overview, International Journal of Satellite Communications, 1987, Vol 5," No 3, 219-225".

These VSATs are rapidly spreading in advanced countries, the United States, and are mainly used in business fields such as retail, finance, data service, hotels, and rental cars, mainly for credit card verification, POS data transmission, online terminal transmission to host computers, and various reservations. It is used for business, etc. In addition, remote meter reading and remote control are also being applied, and many micro-earth stations (VSATs) are being operated in Korea using Mugunghwa satellites.

In order to operate such a VSAT, as in the example of FIG. 1, an antenna, a low noise block down converter (LNB), a block up converter (BUC), a set-top box, a modem and a router, etc. are indispensably required. It has a distributed structure that is individually connected and installed and operated.

In particular, the satellite antenna is a reflector antenna, in which the received signal is concentrated on at least one focus using the principle of a reflective telescope, and a horn antenna or a feed horn may be installed at the focal position. , The received signal is reflected from the reflector antenna and transmitted to the feed horn, and the feed horn transmits the signal input to the feed horn through a waveguide to a low noise block down converter (LNB).

In addition, the LNB converts the signal received from the feed horn into a signal of an intermediate frequency band and finally delivers it to an external image reproduction medium such as a set-top box.

Conversely, a transmission signal of an intermediate frequency is converted into a high-frequency signal through a block up converter (BUC), and is radiated into the air toward the satellite through a feed horn and a reflector antenna.

It is also equipped with a modem and a router for interworking with WiFi.

In this case, in the case of a communication satellite antenna that performs both transmission and reception, interference between a transmission signal and a reception signal must be minimized. One of the methods is a method of using different polarizations between the transmission signal and the reception signal. For example, the received signal can use horizontal polarization (H Skew) and the transmitted signal can use vertical polarization (V Skew) or vice versa.

However, the current VSAT is difficult and inconvenient to connect and assemble because each component must be individually connected, and it gives a lot of difficulty to satellite steering.

Therefore, there is a disadvantage in that the gain of the antenna decreases and transmission/reception efficiency decreases.

In addition, there are disadvantages of cost and time waste and inefficiency because individual parts must be individually purchased and assembled individually.

Republic of Korea Patent Publication No. 10-1995-0022512 V.S.A.T (VSAT) simulator for performance analysis of satellite communication network

The present invention was created to solve the problems of the prior art in consideration of the above-described problems in the prior art. In particular, in order to increase the transmission and reception efficiency by increasing the gain during transmission and reception while being able to easily and accurately perform satellite steering, that is, the Skew, Its main purpose is to provide a miniature earth station apparatus for satellite communication for an improved wireless hotspot so as to improve the efficiency of use of satellite frequencies by implementing a reception antenna as a dual polarized antenna.

The present invention is a means for achieving the above object, the fixture 100; Fixture hinge pieces 110 fixed to both side surfaces of the fixture 100; A plate hinge piece 210 rotatably fixed to the fixture hinge piece 110 through a hinge shaft 212; An arc-shaped slot 214 formed in the plate hinge piece 210; A guide pin 220 fixed to the fixture hinge piece 110 while being inserted into the slot 214; The plate hinge pieces 210 are vertically bent at both ends, and the elastic support pieces 230 are vertically bent at the lower end of the support plate 200; A polarized antenna cylinder that is rotatably assembled to the support plate 200 through a rotation shaft 310, and is rotatable about the rotation shaft 310 by mounting parts for satellite communication, and foldable about the hinge shaft 212 (300); It provides a micro-earth station apparatus for satellite communication for a wireless hotspot, comprising a.

At this time, the polarization antenna tube 300 is equipped with a transmission waveguide antenna 400 and a reception waveguide antenna 410, and the transmission waveguide antenna 400 is a high-gain single polarized waveguide antenna, and the reception waveguide The antenna 410 is also characterized by being a high-gain dual polarized waveguide antenna.

According to the present invention, in particular, the reception antenna is implemented as a dual polarized antenna to increase the efficiency of use of satellite frequencies so that satellite steering, that is, polarization (Skew) can be easily and accurately performed, while increasing the gain during transmission and reception to increase transmission and reception efficiency. So that you can get an improved effect.

1 is an exemplary perspective view of a miniature earth station apparatus for satellite communication for a wireless hotspot according to the present invention.
2 is an exploded exemplary view and a side view of an assembled state of the main part of FIG. 1.
3 is an exemplary view showing a steering example (polarization example) of a micro-earth station apparatus for satellite communication for a wireless hot spot according to the present invention.
4 is an exemplary view showing the internal structure of FIG. 1.
5 is an actual sample photo of FIG. 4.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail.

Prior to the description of the present invention, the following specific structure or functional descriptions are exemplified only for the purpose of describing embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms, It should not be construed as being limited to the embodiments described herein.

The micro-earth station apparatus for satellite communication for a wireless hotspot according to the present invention includes a fixture 100 as shown in FIGS. 1 to 3.

The fixing body 100 is preferably a box shape, but it is not necessarily limited to a box shape, and a block shape is also possible.

In addition, the fixture hinge pieces 110 are fixed to both sides of the fixture 100, respectively.

In this case, the fixture hinge piece 110 may have a type of straight angle shape, and may have a structure in which a fan-shaped piece is formed at an upper end.

In addition, a plate hinge piece 210 is rotatably fixed to the fixture hinge piece 110 through a hinge shaft 212.

At this time, the plate hinge piece 210 is formed so that both ends of the support plate 200 are vertically bent to have a fan shape corresponding to the plate hinge piece 210.

In addition, an arc-shaped slot 214 is further formed in the plate hinge piece 210, and a guide pin 220 is inserted through the slot 214 and fixed to the fixture hinge piece 110. .

Accordingly, the support plate 200 is rotatable within the angular range of the slot 214, and is preferably configured to rotate by 90° as shown in FIG. 3.

In addition, a polarized antenna cylinder 300 is rotatably assembled to the support plate 200 through a rotation shaft 310.

As a result, the polarization antenna cylinder 300 can adjust the polarization (Skew) while rotating clockwise or counterclockwise as shown in FIG. 3 with the rotation shaft 310 as a starting point, and the hinge shaft 212 as a starting point. It is possible to adjust the azimuth angle (Azimuth) since it is possible to fold from the side of the fixture 100 to the upper surface according to the guidance of 214 and the guide pin 220.

In particular, the support plate 200 is formed with an elastic support piece 230 disposed to have a curvature corresponding to the outer circumferential surface of the lower end of the polarized antenna cylinder 300 by bending vertically after the lower end is extended, and the elastic support piece ( 230), although not shown, a semicircular projection protrudes. In this case, the elastic support piece 230 may be divided into a plurality of prongs.

In addition, a plurality of positioning grooves 320 are formed on the outer circumferential surface of the polarized antenna cylinder 300 at a predetermined interval, preferably 45° apart.

In this case, the positioning groove 320 is configured to be engaged with the semi-circular protrusion, and the elastic support piece 230 having the semi-circular protrusion is elastically deformable, so that the polarization antenna cylinder 300 rotates more than a certain amount. When the torque is applied, the fixing force is released, and the polarized antenna cylinder 300 may be rotated.

Therefore, in the present invention, the polarization control is adjusted in the order of 0 degrees, 45 degrees, and 90 degrees, and since the polarization antenna tube 300 is configured in a circular shape, it is easy to use because it is not unreasonable to rotate in any direction regardless of direction. .

Meanwhile, a waveguide antenna 400 for transmission and a waveguide antenna 410 for reception are mounted inside the polarization antenna tube 300 as illustrated in FIGS. 4 and 5.

At this time, the transmission waveguide antenna 400 is a high-gain single polarized waveguide antenna, and the receiving waveguide antenna 410 is a high-gain dual polarized waveguide antenna.

For example, in general VSAT communication, the transmit antenna and the receive antenna have a polarization of 90 degrees orthogonal, and if the transmit antenna is H polarization, the receive antenna is V polarization, or if the transmit antenna is V polarization, the receive antenna is H polarization.

However, the polarization of the satellite's frequency (repeater) changes from time to time. That is, they are relocated for efficient use of frequencies. In some cases, if the transmission is H (horizontal) polarization, the reception may be V (vertical) polarization or H (horizontal) polarization.

In order to increase the efficiency of communication in such a variable situation, the receiving antenna is equipped with a high-gain antenna having dual polarization.

In other words, it is possible to construct a communication system that is differentiated and versatile through the application of a dual polarized reception antenna to the communication limitations of the existing V-SAT antenna system.

In other words, the present invention configures the reception waveguide antenna 410, which is a reception antenna, as a dual polarized antenna in order to increase the efficiency of using satellite frequencies in various environments.

This is because when the transmission waveguide antenna 400 is H-polarized, the reception waveguide antenna 410 can use both H-polarized or V-polarized waves, thereby increasing the reception gain, that is, the antenna gain, so that the reception defect hardly occurs. It is to do.

Therefore, even when the transmission waveguide antenna 400, which is the opposite, is V-polarized, the reception waveguide antenna 410 can use both H-polarized and V-polarized waves.

In addition, a WiFi module 420, a power divider 430, a modem 440, a BUC 450, and the like are mounted.

As a result of testing the transmission efficiency of the transmission waveguide antenna 400 of the present invention having such a configuration, it is shown as shown in the graph below.

The graph is a graph indicating that the frequency communication for transmission in the Ku-Band band is possible. If the horizontal axis 13.5GHz ~ 14.5GHz band is less than -10dB frequency loss on the vertical axis, it means a communication available frequency band. That is, it indicates satisfaction.

In addition, as a result of testing the reception efficiency of the reception waveguide antenna 410, it was shown in the graph below.

A high-gain antenna is required for long-distance communication with a static satellite, and the graph is a radiation pattern graph showing antenna gain (antenna performance) to satisfy this, indicating that there is an excellent gain characteristic of 37.6 dBi.

Through this, the present invention was able to confirm the transmission and reception efficiency of high gain despite being implemented as an integrated unit.

100: fixture
200: support plate
300: polarized antenna tube

Claims (2)

delete Fixture 100; Fixture hinge pieces 110 fixed to both side surfaces of the fixture 100; A plate hinge piece 210 rotatably fixed to the fixture hinge piece 110 through a hinge shaft 212; An arc-shaped slot 214 formed in the plate hinge piece 210; A guide pin 220 fixed to the fixture hinge piece 110 while being inserted into the slot 214; The plate hinge pieces 210 are vertically bent at both ends, and the elastic support pieces 230 are vertically bent at the lower end of the support plate 200; A polarized antenna cylinder that is rotatably assembled to the support plate 200 through a rotation shaft 310, and is rotatable about the rotation shaft 310 by mounting parts for satellite communication, and foldable about the hinge shaft 212 In the micro-earth station apparatus for satellite communication for a wireless hotspot comprising; (300);
The polarization antenna tube 300 is equipped with a transmission waveguide antenna 400 and a reception waveguide antenna 410, and the transmission waveguide antenna 400 is a high-gain single polarized waveguide antenna, and the reception waveguide antenna ( 410) is a micro-earth station apparatus for satellite communication for a wireless hot spot, characterized in that it is a high-gain dual polarized waveguide antenna.

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