Mobile satellite television receiving system

A receiving system and satellite TV technology, applied in the field of electrical communication, can solve the problems of increasing wind resistance coefficient due to the requirement of installation space, high manufacturing process requirements, blocking diffraction satellite signals, etc. The effect of reducing the drag coefficient

Inactive Publication Date: 2013-03-06
叶昌焜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned back-feeding positive parabolic antenna is used in the mobile satellite TV receiving system, and there are two problems: 1. In terms of technical performance: the sub-reflector and its supporting rod at the focal point will block and diffract satellite signals; The secondary reflection of the sub-reflector will cause a large signal loss
This requires high manufacturing processes and high manufacturing costs.
[0005] The above-mentioned formally installed offset feed antenna is used in the mobile satellite TV receiving system, and there are also two problems: 1. The distance from the center of gravity of the antenna surface to the pitch axis is relatively long, which makes the pitch drive torque very large
In this way, it not only increases the cost, but also increases the requirements for the installation space and increases the drag coefficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The power transmission mechanism of the first embodiment adopts a synchronous pulley and a synchronous belt. see figure 1 , image 3 , Figure 4 .

[0042] The mobile satellite TV receiving system includes an antenna (1) and a servo system (2); the antenna (1) is an offset feed antenna, including a reflector (1a), a feed rod (1b) and a tuner (1c) ; The standard offset antenna can be used directly, and can also be customized according to the needs.

[0043] The rear arm of the feed rod (1b) is installed on the back of the reflective surface (1a), and the forearm extends from the outside of the reflective surface (1a) to the front of the reflective surface (1a) and is symmetrical to the parabolic plane parallel to the reflective surface (1a) Shaft (1e).

[0044] The high-frequency head (1c) is installed at the end of the forearm of the feed rod (1b), which is the focus position of the reflective surface (1a).

[0045] The antenna (1) is side-mounted on the servo sy...

Embodiment 2

[0058] The implementation of the second embodiment is basically the same as that of the first embodiment, except that the power transmission mechanism adopts gears. see figure 1 , image 3 , Figure 5 , Figure 6 .

[0059] The specific difference is that the pitching stepper motor (4) is fixed on the active vertical support plate (3a) on the antenna bracket (3), and is connected with the control circuit (10) through a cable; the pitching power transmission mechanism ( 5) including the pitch driving gear (5d) and the pitch driven gear (5e); the pitch driving gear (5d) is fixed on the rotating shaft of the pitch stepper motor (4), and the pitch driven gear (5e) is connected with the feed rod (1b ), the pitching driving gear (5d) and the pitching driven gear (5e) are meshed together; like this, the pitching stepper motor (4) can drive the antenna (1) to perform pitching rotation around the pitching shaft (5f).

[0060] The azimuth stepper motor (6) is fixed on the azimuth ...

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Abstract

The invention discloses a mobile satellite television receiving system using an offset antenna and belongs to the technical field of satellite broadcast reception. The system solves the problems of low receiving efficiency and control precision, large power consumption and size and high cost of existing mobile satellite television receiving systems using reflector antennas. The mobile satellite television receiving system comprises the offset antenna and a servo system, wherein the offset antenna is mounted on the servo system horizontally and laterally. The middle of a front arm of a feed source rod of the offset antenna is connected with a pitching drive mechanism, and the other side of a reflecting surface of the offset antenna is connected on an antenna support, so that the offset antenna can rotate around a rotating shaft which penetrates through and is perpendicular to the middle of the front arm of the feed source rod, and torque of pitching rotation and diameter of a pitching movement locus circle of the offset antenna are small. The servo system rapidly adjusts azimuth angle and pitching angle of the offset antenna according to movement of a mobile carrier, so that the offset antenna is aligned with a satellite. The system is high in receiving efficiency and control precision, small in size, low in power consumption, low in cost and easy to manufacture, popularize and use.

Description

technical field [0001] The invention belongs to the satellite broadcast receiving technology (H04H 40 / 90) in the field of telecommunication, and in particular relates to a satellite TV receiving system for a mobile carrier. Background technique [0002] Satellite TV signals come from satellites in geosynchronous orbit relative to the earth. To receive satellite signals on the ground, you need to use a receiving antenna that is aligned with the satellite. Mobile carriers refer to platforms that move, rotate, and shake, such as ships, trains, and automobiles. In order to receive television signals from geostationary satellites on such a platform, in addition to the above-mentioned receiving antenna, a servo system for keeping the antenna plane aligned with the satellite is required. These two parts constitute the mobile satellite TV receiving system. [0003] The mobile satellite TV receiving system basically receives satellite signals in the Ku-band (frequency range 10.7GH...

Claims

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Application Information

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IPC IPC(8): H01Q19/10H01Q19/12H01Q1/12H01Q3/08
Inventor 叶昌焜
Owner 叶昌焜
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