JPH0477101A - Converter for satellite broadcasting reception and its measuring device - Google Patents

Abstract

PURPOSE:To simplify construction and to accurately measure electrical characteristics by integrally forming the input waveguide part of a BS converter and a primary radiator in the main body of a chassis and forming the output end side of the waveguide for measurement to be closely fit in and adhered to the input end side of the primary radiator. CONSTITUTION:A circular input guidewave 2a' of the BS converter and a road- shaped waveguide-type primary radiator 2b' are integrally formed in construction in the main body of a chassis 2' mounting the circuit construction parts of the BS converter through circuit substrates 5 and 6, and an output end 10a side of a waveguide 10' for measurement of the measuring device used in the measurement of the electrical characteristics of the BS converter is fit in and adhered to the input end side of the funnel-shaped waveguide-type primary radiator part 2b' to turned to be a conical form like the integral circular waveguide of its input waveguide part 2a'. Further, a rib 13 for positioning is formed on the outer peripheral part of the primary radiator part 2b', and a groove 14 for positioning fit in the rib 13 on the conical-shaped output end 10a' of the waveguide 10' for measurement is formed.

Description

[Detailed Description of the Invention] ■And above and above ■Stand! The present invention relates to a satellite broadcast receiving converter (hereinafter referred to as "rBS converter") that integrates a waveguide type primary radiator, and a measuring device for measuring its electrical characteristics such as noise figure and gain. .

Conventionally, a BS converter is attached to a parabolic antenna together with a primary radiator, such that the signal received by the parabolic antenna is input through the primary radiator to its input waveguide section. Recently, in order to reduce the size and weight, devices that integrate the BS converter and the primary radiator have come into use, such as the integrated structure shown in Figure 6. ．． That is, (1) is the outer case of the BS converter, (2) is the chassis body arranged inside the outer case (1) and in which the circular input waveguide section (2a) of the BS converter is formed, and (3) is the input guide. The shorting plate (4) of the waveguide section (2a) is used to extract the electromagnetic field mode signal input to the input waveguide section (2a).
), (5) (6) is a circuit board arranged in the chassis body (2) and on which many circuit components are mounted, and (7) is provided protruding from the outer case (1). This is an output connector. (8) is a waveguide type primary radiator that is attached closely to the input waveguide section (2a) of the BS converter and then its exterior case (1) is attached; It is a waterproof cap that prevents

Therefore, in a BS converter with such an integrated structure,
The electromagnetic field mode signal input from the parabolic antenna to its input waveguide section (2a) through the primary radiator (8) is reflected by the shorting plate (3) and taken out by the conductor rod (4), resulting in a coaxial It is sent to the circuit board (5) as a mode signal. After amplifying and converting the frequency from the 12 GHz band to the I GHz band intermediate frequency using the circuit boards (5) and (6), the coaxial cable is connected to the output connector (7) connected to the circuit board (6) side. The signal is supplied to an indoor BS tuner via the BS tuner.

However, conventionally, when measuring the electrical characteristics of a BS converter with an integrated structure using a measurement device, it is difficult to measure the electrical characteristics of a BS converter with the same shape as the input waveguide section (2a) (in this case, a circular shape). ) measurement waveguide (10) is used, so it can be attached to the primary radiator (8) and its -order radiator (8) with its primary radiator (8) removed from the BS converter. With only the chassis body (2) with the exterior case (1) removed,
As shown in Fig. 7, the measurement waveguide (lO) is brought into close contact with the input waveguide section (2a) of the chassis body (2), and the measurement signal is transferred to the measurement waveguide coaxial converter (11). The input waveguide section (2a) is input through the measuring conductor rod (12) and the measuring waveguide (10) for measurement. The characteristics of the converter could not be measured. Furthermore, in the past, in order to measure such characteristics, the input waveguide section and the primary radiator were formed on each side, which made the structure of the BS converter more complicated and required more time and effort to assemble it. This resulted in an increase in costs.

The present invention has been made in view of these points, and includes-
It is an object of the present invention to provide a measuring device capable of measuring the electrical characteristics of a BS converter as a finished product with an integrated secondary radiator, and a BS converter whose integrated structure is simplified.

In order to achieve the above-mentioned object, the present invention provides a BS converter having an input waveguide section into which a signal is input from a waveguide type primary radiator, in which circuit components thereof are mounted. The input waveguide section and the waveguide type primary radiator are integrally formed in the chassis body.In addition, the BS which integrates the waveguide type primary radiator in this way A measurement device for measuring the electrical characteristics of a converter, which has a measurement waveguide that supplies a measurement signal to a BS converter, and the output end of the measurement waveguide is fitted into the input end of a primary radiator. The measurement waveguide and the primary radiator are shaped to fit tightly together, and furthermore, a means for positioning the measurement waveguide and the primary radiator when they are fitted is provided.

Shoji J1 With this configuration, it is possible to measure the electrical characteristics of the BS converter as a finished product with an integrated -order radiator with high accuracy, and the input waveguide section of the BS converter and By integrally forming the primary radiator and the chassis body, the structure can be simplified.

叉J! An embodiment of the present invention will be described below with reference to the drawings.

It should be noted that the same parts as those in the prior art will be given the same reference numerals and the explanation thereof will be omitted.

In this embodiment, as shown in FIG. (2a'') and a funnel-shaped waveguide type primary radiator part (2b') are integrated into one body, and the measurement device used to measure the electrical characteristics of the BS converter is used. The output end (10a'') side of the optical waveguide (10') is tightly fitted to the input end side of the funnel-shaped primary radiator section (2b') to form the input waveguide section (2a'). ) is shaped like a cone to form an integral circular waveguide.

Furthermore, in this embodiment, a positioning rib (I3
), and a positioning groove (14) that fits with the rib (13) is formed at the conical output end (10a') of the measurement waveguide (10'), When both were fitted tightly together to measure the electrical characteristics, the lip (1
3) and the groove (14), the input waveguide section (2)
a') and the measurement conductor rod (12) inserted into the measurement waveguide (10") of the measurement waveguide coaxial converter (11"). - It is positioned so that it is located on a straight line.

Therefore, in this example, the electrical characteristics of the BS converter can be measured with high precision in the finished product state as shown in FIG. Since the measurement can be carried out with the conductor rod in the pipe positioned in a straight line, the measurement error can be minimized.

As mentioned above, according to the BS converter and its measuring device of the present invention, it is possible to simplify the integrated structure of the waveguide type primary radiator, and also to measure its electrical characteristics. It is possible to perform the process with high precision in the state of the finished product.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of the BS converter of the present invention, Fig. 2 is its front view, Fig. 3 is a side view of its measurement waveguide coaxial converter, Fig. 4 is its front view, and Fig. 5 is its front view. FIG. 6 is a schematic sectional view showing the conventional structure, and FIG. 7 is a schematic sectional view showing the measurement state. (1) - Exterior case, (2) (2' - glossy main body (2a) (2a") - input waveguide section. (2b') - next radiator section. ( 10) (10') --- Measurement waveguide, (10
a') - Output end. (13)...-Rep for positioning. (14) - Positioning groove.

Claims (3)

[Claims] (1) In a satellite broadcast receiving converter that has an input waveguide section into which a signal is input from a waveguide type primary radiator, in the chassis body in which the circuit components are mounted,
A converter for satellite broadcast reception, characterized in that an input waveguide section and a waveguide type primary radiator are integrally formed. (2) A measurement device that measures the electrical characteristics of a satellite broadcast reception converter that integrates a waveguide type primary radiator, which has a measurement waveguide that supplies measurement signals to the satellite broadcast reception converter. A measurement device characterized in that the output end side of the measurement waveguide is shaped to fit tightly into the input end side of the primary radiator. (3) The measuring device according to claim 2, characterized in that the measuring waveguide and the primary radiator are provided with means for positioning when fitting each other.