JPH0137041B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a unit structure for a microwave to millimeter wave band such as a transmitter/receiver panel.

(b) Background of the technology In order to obtain stable input/output electrical characteristics, microwave or millimeter wave band units such as transmitter/receiver panels of multiplex radio equipment undergo complex adjustment of the low-noise amplifier section including the isolator, and then perform other Must be connected to the circuit inside the panel.

(c) Prior Art and Problems FIG. 1 is a partially cutaway perspective view showing the structure of a conventional unit of this type.

In Fig. 1, the unit 1 is a box-shaped unit with a shield structure made of a metal plate, which includes a control system, a transmitting/receiving module such as a power supply, and a microwave or millimeter wave band module 5 (hereinafter simply referred to as a microwave module) (not shown). It is configured to be housed in a housing casing 2. Further, a coaxial connector 6 having an insertion portion on the inside and outside of the housing casing 2 so as to be connectable with another coaxial connector is attached to the side plate of the housing casing 2 as a shield. The microwave module 5 is configured to be connected to a coaxial isolator 4, which will be described later, and which is mounted on the outside of the housing casing 2 via this coaxial connector 6.

The microwave module 5 with the coaxial connector 8 attached to the end face is adjusted individually and then fixed to the mounting plate 9, and the coaxial connector 8 and the coaxial connector 6 are fixed to the mounting plate 9.
The pipe cable 7 is connected to the pipe cable 7, which is suitably bent.

The interface waveguide 3 and the coaxial isolator 4, which are connected to an external circuit, are connected by a coaxial connector. After the coaxial isolator 4 is adjusted together with the interface waveguide 3, the coaxial connector attached to the end face is inserted into the coaxial connector 6, and the microwave module is connected via the pipe cable 7 in the accommodation case 2. 5.

However, unit 1 with such a structure is
Coaxial isolator 4 and microwave module 5
After connecting the coaxial isolator 4 and the microwave module 5, the cover 2A of the housing case 2 must be removed and disassembled, and the coaxial isolator 4 and the microwave module 5 must be adjusted together. This poses a problem in that the reproducibility of electrical characteristics is poor. In addition, the presence of the pipe cable 7 increases transmission loss, requires a space for attaching and detaching the pipe cable 7 within the housing 2, which may result in an increase in size, and mechanical contact points such as coaxial connectors and pipe cables are required. In many cases, electrical stability may be lacking.

(d) Object of the Invention In view of the above-mentioned conventional problems, the object of the present invention is to connect an isolator and a microwave module via a connection plate, and after composite adjustment, install the microwave module in a shielded housing. The object of the present invention is to provide a unit that is easy to mount, has stable electrical characteristics, and is miniaturized as a whole.

(e) Structure of the Invention In order to achieve this object, the present invention comprises a waveguide located outside the housing and connected to an external circuit, and a module section connected to the waveguide and located in the housing. ,
a flange-like connecting plate provided on the module part;
The insertion hole of the module part is composed of a casing formed in a wall, and the module part is inserted through the hole of the casing and the connecting plate is fixed in contact with the wall surface, thereby establishing a shield connection. It is something.

(f) Embodiments of the Invention The present invention will be described in detail below with reference to illustrated embodiments. Note that the same reference numerals indicate the same objects throughout the figures.

FIG. 2 is a perspective view of one embodiment of the invention, and FIG. 3 is a perspective view of another embodiment of the invention.

In FIG. 2, the unit 20 includes transmitting/receiving modules (not shown) for a control system, power supply, etc., which are housed in a box-shaped housing casing 21 with a shielded structure made of metal plates, and a module mounted on the outside of the housing casing 21. interface waveguide 3, coaxial isolator 4
, and a microwave module 10 that is mounted in the housing casing 21 after being subjected to combined adjustment with the coaxial isolator 4 .

The interface waveguide 3 and the coaxial isolator 4, which are connected to an external circuit, are connected by a coaxial connector. A coaxial connector for connecting to the microwave module 10 is attached to the end face of the coaxial isolator 4. The coaxial isolator 4 and the interface waveguide 3 are adjusted so as to obtain desired characteristics.

A connecting plate 11 in the form of a rectangular plate, which is sufficiently larger than the end face shape of the microwave module 10, is attached to the end face of the microwave module 10, which is adjusted to obtain desired characteristics when used alone. A coaxial connector 12 for connecting to the coaxial isolator 4 in a coaxial structure is attached to the connection plate 11.

The microwave module 10 is constructed by inserting the coaxial connector 12 attached to the connecting plate 11 into the coaxial connector attached to the end face of the coaxial isolator 4.
After being mechanically and electrically coupled to the coaxial isolator 4, complex adjustments are made to obtain desired characteristics.

Reference numeral 21 denotes a microwave module 10 coupled to a transmitter/receiver module (not shown), an interface waveguide 3, and a coaxial isolator 4.
It is a box-shaped housing housing with a shield structure made of a metal plate into which only the microwave module 10 portion of the microwave module 10 is inserted and mounted. The microwave module 10 passes through the side plate of the accommodation case 21 and
A module through-hole 14 is bored through the module so that it can be hung in the module. A connection plate 11 is fitted into the peripheral edge of the outer end surface of the module through-hole 14, and a rectangular connection plate insertion recess 13 is provided in which the plane of the connection plate 11 on the side of the microwave module 10 is in close contact with the bottom plate surface of the recess. ing. A screw hole 13a is provided on the bottom plate surface of the connection plate insertion recess 13 in correspondence with the screw insertion hole 11a provided in the connection plate 11. Insert the microwave module 10, which has already been subjected to composite adjustment, into the module through-hole 14 of the housing casing 21, fit the connection plate 11 into the connection plate insertion recess 13 so that it fits tightly, and tighten it with a small screw (not shown). It's stuck.

As mentioned above, the microwave module 10, which is integrated with the interface waveguide 3 and the coaxial isolator 4, is shielded in a suspended state in the housing casing 21 and is mechanically fixed. Therefore, there is no need to adjust the microwave module 10 again after mounting it in the housing casing 21. Further, since the microwave module 10 is suspended within the housing case 21, there is no need for a mounting plate or a pipe cable, and the housing case 21 can be made smaller. Furthermore, since there is no mechanical coupling member such as a pipe cable, the electrical characteristics are also stable.

In FIG. 3, the unit 22 includes transmitting/receiving modules (not shown) such as a control system and a power source housed in a box-shaped housing casing 21 with a shield structure made of a metal plate, and a module mounted on the outside of the housing casing 21. Interface waveguide 3, waveguide isolator 1
5, and a microwave module 10 that is combined with a waveguide isolator 15 and subjected to composite adjustment and then mounted in a housing casing 21.

The interface waveguide 3 is flange-coupled to a waveguide type isolator 15. The waveguide isolator 15 and the interface waveguide 3 are adjusted so as to obtain desired characteristics.

A connecting plate 11 in the form of a rectangular plate, which is sufficiently larger than the end face shape of the microwave module 10, is attached to the end face of the microwave module 10, which is adjusted to obtain desired characteristics when used alone. A rectangular hole corresponding to a predetermined frequency is bored in the center of the connecting plate 11, and the upper plane thereof is configured so that the flange of the waveguide 16 is tightly fixed thereto. The microwave module 10 and the waveguide isolator 15 are electrically and mechanically coupled via a waveguide 16.

After integrating the microwave module 10 and the waveguide isolator 15 in this way, the microwave module 10 and the waveguide isolator 15 are integrated.
are adjusted in a complex manner to obtain the desired characteristics.

Insert the microwave module 10, which has already been subjected to composite adjustment, into the module through-hole 14 of the housing casing 21, fit the connection plate 11 into the connection plate insertion recess 13 so that it fits tightly, and secure it with machine screws (not shown). ing.

A casing 21 houses the microwave module 10 which is integrated with the interface waveguide 3 and the waveguide isolator 15 in a composite manner as described above.
Since the microwave module 10 is shielded in a suspended state and mechanically fixed, there is no need to readjust the microwave module 10 after mounting it in the housing casing 21.

Although it is difficult to apply coaxial connectors and pipe cables to high-frequency devices (for example, 9 GHz or higher), the unit 22 in the embodiment shown in Fig.
Since they are all connected by waveguides, they have the advantage of being applicable to transmitting boards and/or receiving boards in a wide range of frequency bands without being limited by frequency.

(g) Effects of the Invention As explained above, in the present invention, the isolator and the microwave or millimeter wave band module are connected via the connection plate and mounted in the accommodation housing in a compositely adjusted state, so that the electrical characteristics It has practical advantages such as being stable, easy to install in the storage case, compact by making the most of the mounting space of the storage case, and reducing transmission loss by reducing the number of connections such as connectors. It has excellent effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing the structure of a conventional unit, FIG. 2 is a perspective view of one embodiment of the present invention, and FIG. 3 is a perspective view of another embodiment of the present invention. It is. In the figure, 1, 20, 22 are units, 2, 21 are housing cases, 3 is an interface waveguide, 4 is a coaxial isolator, 5, 10 are microwave to millimeter wave band modules, 6, 8, 12 is a coaxial connector, 7 is a pipe cable, 11 is a connection plate, 13 is a connection plate insertion recess, 14 is a module through hole, 15
indicate waveguide isolators.

Claims (1)

[Claims] 1. A waveguide located outside the casing and connected to an external circuit, a module part connected to the waveguide and located in the casing, a flange-shaped connection plate provided on the module part, and the module part It is characterized by comprising a casing in which an insertion hole is formed in a wall, the module part is inserted through the hole of the casing, and the connecting plate is fixed in contact with the wall surface to form a shield connection. unit structure.