JPH01206732A - Converter for microwave reception - Google Patents

Abstract

PURPOSE:To easily assemple and adjust a converter for micro-wave reception by obtaining one edge of a hollow cylinder shaped base frame as a water- tightness micro-wave input edge, converting a microwave to an electric signal with a receiving member on the holding member of the base frame and outputting the signal from a water-tightness output edge. CONSTITUTION:The microwave is conducted from the horn type wave conducting port 8 of a surface member 11 the a base frame 11 to form a cylinder shape. The base frame 5 and surface member 11 obtained the water tightness with an O-ring 13 and is engaged by a linking part 9. A receiving member 21 and a converter part 33 are formed on a holding member 20 which is protruded from a rear member 15. A waveguiding tube 22 of the receiving member 21 is coupled with the front wall 7 of the eave conducting port 8 by a flange 27 and tuning is obtained by a reflecting board 24 and a probe 25. The microwave is amplified by printed substrates 34 and 35 of the converter part 33 and mixed with a local oscillating signal. Then, the microwave is detected and sent from an output terminal 16 as the electric signal. The rear member 15 and base frame 5 obtain the water tightness by an O-ring 17. Thus, the converter can be easily assembled and adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a microwave receiving converter that receives microwave radio waves, converts them into electrical signals, and outputs them.

[Conventional technique 1] A receiving member is provided at one end of the hollow case main body, and one end of the -order radiator is connected thereto, and an opening formed in the side surface of the hollow case main body is provided. In some cases, a converter circuit element is provided at a position facing the part, and the opening thereof is closed with an integral cover.

[Problem to be solved by the invention]

When assembling this conventional microwave receiving converter, there are a number of tasks such as connecting one end of the -order radiator and one end of the case body, and putting a waterproof cover over the other end of the -order radiator. However, there is a problem in that it requires an extremely large amount of work, including the work of assembling the converter circuit element into the case body, the work of connecting the converter circuit element to the above-mentioned receiving member, and the work of closing the cover integrally to the opening of the case body. there were.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a microwave receiving connector which can be assembled extremely easily.

[Means to solve problems]

In order to achieve the object 1, the present invention takes the measures described in the claims above, and its effects are as follows.

[Effect]

In the case of assembly, the converter circuit elements can be easily assembled into the holding member which is completely separate from the base frame and is in an open state. When assembling, when the back member is closed to the other end of the rear base frame, the receiving member provided on the holding member is correctly positioned with respect to the radio wave introduction I in the base frame.

〔Example〕

The drawings showing the embodiments of the present application will be described below.

In FIGS. 1 to 3, 1 is a microwave receiving converter, 2 is a support member, and the support arm of a parabolic antenna is shown as an example, and the converter 1 is attached to a support part 3 at the tip of the support arm 4. That's the installation.

In the above-mentioned Conharc 1, reference numeral 5 denotes a base frame, which is formed into a hollow cylindrical shape and made of a material with good conductivity.

In the base frame 5, reference numeral 6 denotes a mounting portion formed on a part of the circumferential surface, which is formed into a flat surface so as to be tightly overlapped with the support portion 3. 7 is a front wall provided at one end 5a of the base frame, and 8 is a radio wave introduction port formed in the front wall, which is formed as a horn for receiving radio waves. Reference numeral 9 denotes a connecting portion for the front member, and a male tap is formed. 10 indicates a through hole.

Next, reference numeral 11 denotes a front member, which is made of a synthetic resin material with low microwave transmission loss. In the front member 11, 1
], a indicates the inner circumferential surface, and llb indicates the outer circumferential surface, which are formed into a spherical surface centered at a common point F.

The position of the above-mentioned point F is determined so that it is located inside the radio wave introduction port 8 and on its central axis 2 when the front member 11 is attached to the base frame. Reference numeral 12 denotes a connecting portion, which has a female thread that is threadedly engaged with the connecting portion 9. Note that 13 is a waterproof gasket interposed between the base frame 5 and the front member 11.

Next, reference numeral 15 indicates a back member, which is made of a metal material with good conductivity. Reference numeral 16 denotes an output terminal attached to the back member, for example, an F-type connector seat is used. A coaxial cable is connected to the output terminal 16 using, for example, an F-type connector, and after connection, waterproofing is performed by taping. 17 is a waterproof gasket interposed between the base frame 5 and the back member 15.

Next, the members provided inside the base frame 5 will be explained.

Reference numeral 20 denotes a holding member that protrudes from the inner surface of the back member 15 as shown. Although this holding member is formed integrally with the back member 15, it may be formed separately and then fixed to the back member 15. Reference numeral 21 denotes a receiving member provided on the holding member 20, and is provided along the end 8a of the radio wave introduction port 8 on the inside side of the base frame. In the receiving member 21, a waveguide 22 is formed into a circular waveguide and is formed integrally with the holding member 20.

23 is a groove formed on the inner surface of the waveguide, 24 is a reflection plate,
It is made of a material with good conductivity. 25 is a probe. Next, 27 is a flange formed integrally with the waveguide 22, which is brought into contact with the front wall 7, and has a threaded hole 28 formed therein. Next, 30 and 31 are positioning members for positioning the holding member 20 with respect to the base frame 5. In these, reference numeral 30 refers to the front wall 7, and 31 refers to the inner peripheral surface of the base frame 5, which is comprised of the front surface and outer peripheral surface of the flange 27, respectively.

Next, 33 is a converter circuit element provided in the holding member 20, and is composed of a first element 33a and a second element 33b.

In the first element and the second element, 34 is a first circuit board;
Reference numeral 35 denotes a second circuit board, each of which is composed of a printed circuit board. In the circuit members provided on the first circuit board 34, 38 is a high frequency amplification section, 39 is a local oscillation section, and 40
indicate the mixer sections. The probe 25 is also attached to the substrate 34. In the circuit members provided on the second circuit board 35, 41 indicates an intermediate frequency amplification section, 42 indicates a power separation filter section, 43 indicates a constant voltage power supply section, and 44 indicates an output end. Next, reference numeral 45 indicates a connection line for power supply, and reference numeral 46 indicates a connection line for outputting an intermediate frequency signal.

Next, the assembly of the above structure will be explained. First, the output terminal 16 is attached to the back member 15 in the state shown in FIG.

Further, the reflecting plate 24 is inserted deep into the waveguide 22 through the groove 23 and fixed there by known means. Next, the first circuit board 34 to which the circuit members have been attached in advance is attached to one surface of the holding member 20, which is separate from the base frame 5, using an upper threaded rod 36. Next, a similar second circuit board 35 is attached to the other surface using an upper threaded rod 37. Next, the connection wires 45 and 46 protruding from the through holes 47 and 48 provided in the second circuit board 35 are soldered to the board 35, and the center conductor 16a of the output terminal 16 and the output end 44 are connected. solder. The output terminal 16 and the reflection plate 24 may be attached after the circuit board is attached.

Next, the back member 15 is closed to the other open end 5b of the base frame 5 as shown in FIG. Then, a fixing rod 29 is screwed into the screw hole 28 through the through hole 10 and tightened, thereby fixing the back member 15 to the base frame 5. By this operation, the holding member 20 is automatically housed in the base frame 5 and becomes fixed. In this case, the positioning member 30 is in close contact with the front wall 7, and the positioning member 31 is along the inner peripheral surface of the base frame 5, so that the end 8a of the radio wave introduction port 8 and the waveguide 22 As shown in Figure 1, the inner space of the two parts overlaps tightly. In the above state, the packing 17 is sandwiched between the base frame 5 and the back member 15, and exhibits its waterproof effect there.

Next, the front member 11 is firmly fixed to one end 5a of the base frame 5 by screwing the connecting portions 9.degree.12. In this state, the packing 13 is sandwiched between the base frame 5 and the front member 11, and the waterproof effect there is also exhibited. With the above steps, the assembly of the microwave receiving converter 1 is completed.

Microwave receiving converter 1 assembled as above
In this case, the probe 25 and the reflector 2 are attached to the mounting part 6.
The orientation of No. 4 correctly matches the pre-designed orientation. Therefore, the microwave receiving converter as described above can be applied both to the case of receiving circularly polarized microwave radio waves and to the case of receiving vertically or horizontally linearly polarized microwave radio waves.

The circuit operation in the converter 1 having the above configuration will be explained.

Direct current 15 is supplied to the output terminal 16 from a well-known tuner (not shown).
When the power of V is supplied, it passes through the filter section 42 from the output terminal 44 to the constant voltage power supply section 43, and from there power is supplied to the members indicated by the symbols 38, 39, and 41, and they operate. .

In this operating state, the converter 1 receives a signal 1
Microwave radio waves of 1.7 to 12 GHz pass through the front member 11 and further enter the waveguide 22 through the radio wave inlet 8 in the converter circuit. The radio wave is then received by the probe 25 and becomes an electrical signal. In the converter circuit element 33, the electrical signal is first amplified by the high frequency amplification section 38 and then reaches the mixer section 40.

The mixer section 40 is supplied with a local oscillation signal from the local oscillation section 39, and the above signal is converted into an intermediate frequency signal of 1 to 1.3 GHz. The signal reaches intermediate frequency amplification section 41 and is amplified there. The amplified signal is passed through the filter section 42
The signal is output from the output terminal 44 to the output terminal 16 through the output terminal 44 . The output intermediate frequency signal is sent to a tuner as is well known.

Next, FIG. 4 shows a different embodiment of the present application, in which the base frame 5
This shows an example in which the means for fixing the back member 15e to e is different. In the fastening means 49, 50 is a female thread formed on the other end of the base frame 5e, and 51 is a male thread formed on the outer peripheral surface of the back member 15e. Each time the back member 158 is fitted together, the back member 158 is attached to the base frame 5e. This work may be done either before or after the work of attaching the front member]], e.

In the case of this example, depending on the strength of the tightening force of the screwed part, the back part +J'15e is slightly misaligned in the direction of rotation with respect to the base frame 5e, and as a result, Although the orientations of the probe 25e and the reflector 24e may vary slightly due to this, such positional deviations do not cause any problems when receiving incoming circularly polarized microwaves. In addition, when receiving linearly polarized microwaves, if it is necessary to precisely align the directions of the probe 25e and the countermeasure plate 24e, a known rotation mechanism may be installed between the support portion 3e and the base frame 5e. It is good to intervene.

It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals as in the previous figure with an alpha character e, and redundant explanations are omitted.

〔Effect of the invention〕

In the present invention, as described in "2" below, in the installed state,
It is possible to receive incoming microwave radio waves, convert them into electrical signals, and output them from the output terminal 16 through the converter circuit element 33. Moreover, in the above-mentioned installation state, the internal waterproof state can be maintained well, and "two-leg operation is possible." Of course, it can be done stably, but in the case of manufacturing, when assembling the receiving section +fl'21 and the converter circuit element 33, it is possible to
It has the effect that it is completely separated from the base frame 5 and is in an open state with no base frame around it, allowing for easy mounting work.

Moreover, even if the circuit elements are installed in the open state away from the base frame 5 as described above, after the installation, the front member 11 is closed to the radio wave inlet 8 of the base frame 5, and the other parts of the base frame 5 are closed. By an extremely simple operation such as closing the back part tA' 15 at the end, the receiving member 21 can be positioned with respect to the radio wave introduction port 8 and the radio wave can be transmitted properly, and at the same time, the opening can be performed. This has the effect of protecting the receiving member 21 and the converter circuit element 33, which were in a waterproof state, from being in a waterproof state.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a longitudinal cross-sectional view;
FIG. 2 is a sectional view taken along line nn, FIG. 3 is an exploded perspective view, and FIG. 4 is a longitudinal sectional view showing a different embodiment. 5... Base frame, 8... Radio wave introduction port, 11... Front member,
15... Back member, 16... Output terminal, 20... Holding member, 21... Receiving member, 33... Converter circuit element. ] 2

Claims (3)

[Claims] 1. It has a hollow cylindrical base frame having a radio wave introduction port at one end and an open end at the other end, and the radio wave introduction port at one end of the base frame is provided with a surface made of a material with low microwave transmission loss. While the members are sealed watertightly, a backing member equipped with an output terminal is sealed watertightly at the other end, and inside the base frame, microwave radio waves are received and electrically transmitted. A receiving member configured to convert into a signal is provided along the end of the radio wave introduction port on the inside of the base frame, and
In the microwave receiving converter, which also includes a converter circuit element that receives the electrical signal from the receiving member, converts the frequency of the electric signal, and supplies the output signal to the output terminal, A holding member is provided protruding toward the radio wave introduction port, and the receiving member and the converter circuit element are attached to the holding member, and the receiving member is located near the receiving member in the holding member. A converter for microwave reception, characterized in that the converter for microwave reception is provided with a positioning member configured to position the holding member so that the member is aligned with the end on the inside side of the base frame in the radio wave introduction port. 2. 2. The microwave oven according to claim 1, wherein a first circuit board for a first element of the converter circuit element is mounted on one surface of the holding member, and a second circuit board for a second element of the converter circuit element is mounted on the other surface of the holding member. Receiving converter. 3. The outer peripheral surface of the flange integrally formed with the holding member,
2. The microwave receiving converter according to claim 1, wherein the converter is arranged along the inner circumferential surface of the base frame.