JPH059044U - SHF receiver - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to obtain a high-performance SHF receiver with a simple configuration. According to the present invention, a local oscillation circuit is formed on an alumina ceramic substrate 1, and a mixer circuit for performing frequency conversion by mixing an oscillation signal from the local oscillation circuit and a signal from an RF amplifier is provided on a Teflon substrate 10. Form on top. Then, after stacking these substrates, the terminals provided on the respective substrates are connected by solder or the like, and housed and fixed in the openings formed in the SHF receiver. Further, the alumina ceramic substrate 1 is covered with a metal lid 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an SHF receiver that receives and amplifies a 12 GHz band signal from a satellite and down-converts it into a 1 GHz band signal.

[0002]

[Prior Art]

 Generally, this kind of SHF receiver is composed of an RF amplifier circuit, a mixer circuit, a local oscillation circuit and the like.

The local oscillator circuit module has a structure shown in FIG.

2a shows an exploded front view, and FIG. 2b shows an exploded side view.

In FIG. 2, reference numeral 1 is an alumina ceramic substrate on which a dielectric resonator 2 and an oscillation circuit are formed, 3 is a metal base, and the metal base 3 has a local oscillation signal output terminal 4 and A local oscillation circuit bias applying terminal 5 is provided, and a local oscillation circuit module mounting screw 6 is provided. Reference numeral 7 is a metal lid for the local oscillator circuit module, and a screw 8 for adjusting the oscillation frequency is attached above the metal lid.

Next, assembly of the local oscillation circuit module and mounting of the local oscillation module to the SHF receiver will be described with reference to FIG.

First, a pattern is printed on the alumina ceramic substrate 1 with copper or the like to form a resonance circuit, and the dielectric resonator 2 is fixed to form a local oscillation circuit. After that, the alumina ceramic substrate 1 is mounted on the metal base 3 by soldering or the like, and the metal base 3 is mounted and fixed by screws 6 to the Teflon substrate 10 mounted in the opening provided in the frame 9 of the SHF receiver. It

Here, since the mixer circuit is formed on the Teflon substrate 10 and the output terminals 4 and 5 of the aluminum ceramic substrate 1 are soldered to the Teflon substrate 10, the local oscillation circuit and the mixer circuit are formed. The circuit is electrically connected.

Then, by covering the alumina ceramic substrate 1 with the metal lid 7, the SHF receiver is completed.

Further, FIG. 4 and FIG. 5 show other conventional techniques.

The same parts as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

In the technique shown in FIG. 4, the alumina ceramic substrate 1 on which the local oscillation circuit is formed has a local oscillation signal output terminal 4 and a local oscillation circuit bias application terminal in a hole provided in the frame 9 of the SHF receiver. 5 is inserted, the local oscillator circuit module mounting screw 6 and the nut 11 are fixed to the frame 9, and the metal lid 7 covers it.

Further, in the technique shown in FIG. 5, the alumina ceramic substrate 1 on which the local oscillation circuit is formed is housed and fixed in the recess 12 formed in the frame 9 of the SHF receiver, and the upper portion of the recess 12 is fixed. It is completed by covering with the metal lid 7.

[0014]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technique, the frame 9 of the SHF receiver and the metal base 3 of the local oscillator circuit module are provided between the alumina ceramic substrate 1 on which the local oscillator circuit is formed and the Teflon substrate 10 on which the mixer circuit is formed. Intervenes.

By the way, FIG. 6 shows the relationship between the thickness of the frame 9 and the oscillation output when the local oscillator circuit module is mounted on the frame 9 of the SHF receiver. From this figure, it can be seen that the thickness of the frame 9 and the oscillation output have an inversely proportional relationship.

Therefore, in the technique of FIG. 2, when the local oscillation circuit module in which the oscillation circuit is formed on the alumina ceramic substrate 1 is mounted on the SHF receiver by the conventional method, the frame 9 of the SHF receiver or the local oscillation circuit module is generated. Since the circuit module metal base 3 is interposed between the local oscillation circuit and the mixer circuit formed on the Teflon substrate 10, the oscillation output is reduced.

Further, as shown in FIG. 7, when the local oscillation signal input to the mixer circuit drops below a certain level, the conversion loss of the mixer circuit drops significantly. Therefore, the conventional SHF receiver configuration method has a problem that the output of the local oscillation circuit is likely to decrease, the conversion loss of the mixer increases, and the performance of the SHF receiver may deteriorate. .

The present invention has been made in view of the above-mentioned drawbacks, and an object thereof is to obtain a high-performance SHF receiver with a simple configuration.

[0019]

[Means for Solving the Problems]

 The present invention is a SHF receiver that receives and amplifies a 12 GHz band signal from a satellite and down-converts it to a 1 GHz band signal by forming a local oscillation circuit on an alumina ceramic substrate and from the local oscillation circuit. The mixer circuit that mixes the oscillating signal and the signal from the RF amplifier to perform frequency conversion is formed on the Teflon substrate, these substrates are stacked, and then the terminals provided on each substrate are soldered, etc. The present invention provides an SHF receiver characterized by being connected by.

[0020]

[Action]

 According to the present invention having the above-mentioned structure, the frame 9 of the SHF receiver and the local oscillator circuit module are provided between the local oscillator circuit formed on the alumina ceramic substrate 1 and the mixer circuit formed on the Teflon substrate 10. No metal base 3, etc. Therefore, it is possible to suppress the decrease in the oscillation output of the local oscillation circuit caused by the frame 9 of the SHF receiver and the metal base 3 of the local oscillation circuit module.

[0021]

【Example】

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

FIG. 1 shows an embodiment of the SHF receiver of the present invention.

In FIG. 1, the ground surface (lower surface) of the Teflon substrate 10 on which the mixer circuit is formed is arranged and fixed so as to face the frame 9 of the SHF receiver. On the other hand, the alumina ceramic substrate 1 on which the local vibration circuit is formed is housed and fixed in the opening provided in the frame 9 of the SHF receiver. At this time, the ground surface of the alumina ceramic substrate 1 (the back surface on which the local oscillator circuit is formed) is arranged so as to face the Teflon substrate 10, and the through hole 13 of the Teflon substrate 10 and the alumina ceramic substrate are arranged. The through holes 13 of No. 1 are arranged so as to coincide with each other.

Then, by connecting these through holes 13 by soldering, the local oscillation signal terminal, the ground terminal, and the local oscillation circuit bias applying terminal of the alumina ceramic substrate 1 and the local oscillation signal terminal, the ground terminal of the Teflon substrate 10 are connected. , And the local oscillator circuit bias application terminal are electrically connected. Then, the metal lid 7 is attached on the alumina ceramic substrate 1 to complete the SHF receiver.

Next, FIG. 8 illustrates a second embodiment of the SHF receiver of the present invention.

In FIG. 8, the Teflon substrate 10 is attached to the frame 9 of the SHF receiver so that the pattern surface on which the mixer circuit is formed is the top surface. Further, the alumina ceramic substrate 1 is arranged on the Teflon substrate 10 so that the surface on which the local oscillation circuit is formed is the upper surface. After that, the local oscillation signal terminal, the ground terminal, and the local oscillation circuit bias application terminal of the alumina ceramic substrate 1 and the local oscillation signal terminal, the ground terminal, and the local oscillation circuit bias application terminal of the Teflon substrate 10 are soldered or the like. The SHF receiver is completed by directly connecting and further covering the alumina ceramic substrate 1 with the metal lid 7.

Further, FIG. 9 illustrates a third embodiment of the SHF receiver of the present invention.

In FIG. 9, the Teflon substrate 10 on which the mixer circuit is formed and the alumina ceramic substrate 1 on which the local oscillation circuit is formed are arranged so that the ground planes of the respective substrates face each other, and the opposing ground planes are arranged. Connect with solder. On the other hand, a concave portion 12 is formed in the frame 9 of the SHF receiver, and an adjusting screw 8 for adjusting the local oscillation frequency is attached to the lower portion of the concave portion 12. Then, the Teflon substrate 10 is attached to the frame 9 of the SHF receiver so that the alumina ceramic substrate 1 is housed in the recess 12, and the metal lid 7 seals. Compared with the first and second embodiments, the metal lid 7 is unnecessary in the present embodiment, so that it is possible to reduce the number of parts and the number of steps.

[0029]

[Effect of the device]

 The present invention provides a local oscillation circuit formed on an alumina ceramic substrate 1 and a mixer circuit formed on a Teflon substrate 10 without interposing a frame 9 of an SHF receiver or a metal base 3 of a local oscillation circuit module. By directly connecting the local oscillator circuit and the mixer circuit, it is possible to suppress the decrease in the oscillation output of the local oscillator circuit that has occurred in the past. In other words, according to the present invention, it is possible to prevent the deterioration of the conversion loss performance of the mixer circuit caused by the lowering of the local oscillation signal level, and it is possible to configure an SHF receiver with high performance and stable characteristics. Become.

Further, in the present invention, the metal base 3 for the local oscillation circuit, which has been necessary in the past, is not necessary, and the metal lid 7 is also composed of the frame 9 of the SHF receiver as shown in FIG. As a result, it is possible to obtain the effect of reducing the number of parts and man-hours compared with the conventional method.

[Brief description of drawings]

FIG. 1 shows a first embodiment of an SHF receiver according to the present invention.

FIG. 2 shows a local oscillator circuit module of a conventional SHF receiver.

FIG. 3 shows an embodiment of a conventional SHF receiver.

FIG. 4 shows another embodiment of a conventional SHF receiver.

FIG. 5 shows another embodiment of a conventional SHF receiver.

FIG. 6 is a diagram showing the relationship between the frame thickness of the SHF receiver and the oscillation output of the local oscillation circuit.

FIG. 7 is a diagram showing a relationship between an input level of a local oscillation signal and a conversion loss performance in a mixer circuit.

FIG. 8 shows a second embodiment of an SHF receiver according to the present invention.

FIG. 9 shows a third embodiment of the SHF receiver according to the present invention.

[Explanation of symbols]

 1 Alumina Ceramic Substrate 2 Dielectric Resonator 3 Metal Base 4 Local Oscillation Signal Output Terminal 5 Local Oscillation Circuit Bias Apply Terminal 6 Local Oscillation Circuit Adjustment Screw 7 Metal Lid 8 Local Oscillation Circuit Module Mounting Screw 9 Frame 10 Teflon Substrate 11 Local Oscillation circuit module mounting nut 12 recess 13 through hole

Claims (1)

[Claims for utility model registration] [Claim 1] Reception of 12 GHz band signals from satellites,
SH that amplifies and down-converts to a 1 GHz band signal
In the F receiver, a local oscillation circuit is formed on an alumina ceramic substrate, and a mixer circuit for performing frequency conversion by mixing an oscillation signal from the local oscillation circuit and a signal from an RF amplifier is formed on a Teflon substrate. The SHF receiver is characterized in that after these substrates are superposed, the terminals provided on the respective substrates are connected by soldering or the like.