JPH0147041B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to the structure of a microwave unit such as a transmitting/receiving panel.

(b) Background of the technology Microwave units such as transmitter/receiver boards of multiplex radio equipment are required to be equipped with modules that are complexly adjusted, and to have a structure that takes into account miniaturization and shielding of the unit.

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

In FIG. 1, a microwave unit 1 includes a control system, a transmitting/receiving module such as a power supply (not shown), and a microwave module 5 housed in a box-shaped housing 2 with a shield structure made of a metal plate. There is. 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 via this coaxial connector 6 to a coaxial type isolator 4, which will be described later, and which is mounted on the outside of the housing casing 2.

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 input/output coaxial connector of the isolator 4 is inserted into the coaxial connector 6, and the micro It is connected to the wave module 5.

However, in the microwave unit 1 having such a structure, the microwave module 5, which has been adjusted individually, is housed in the housing 2 and connected to the coaxial isolator 4 via the pipe cable 8 and the coaxial connector 6. It is necessary to remove the cover plate of the module 5 and readjust the combination again, and in this case, there is a risk that radio waves may leak from the gap that mechanically connects the inside and outside of the housing. In addition, the presence of the pipe cable 7 increases transmission loss, and the need for space for the installation and removal of the pipe cable 7 within the accommodation housing 2 may result in an increase in size, and coaxial connectors, pipe cables, etc.
The problem is that it cannot be applied to transmitter/receiver panels (9GHz or higher).

(d) Purpose of the Invention The purpose of the present invention is to solve the above-mentioned conventional problems and to provide a device that has little leakage of radio waves to the outside of the casing, is easy to install in a shield, has stable electrical characteristics, and can be used over a wide range of frequencies. The purpose of the present invention is to provide a compact microwave unit structure that can be applied to

(e) Structure of the Invention In order to achieve the above object, the present invention directly connects and integrates an external connection waveguide, a waveguide isolator, and a microwave module, and creates a box-shaped casing that houses them. A connection hole equal to the inner size of the external connection waveguide is provided on one side, and the external connection waveguide is fixed with its inner diameter aligned with the connection hole.

By directly coupling and integrating the external connection waveguide, wave tube type isolator, and microwave module, it is possible to eliminate the need for adjustment after mounting inside the housing, and there is no need for mechanical coupling. Even if radio waves leak, there is no risk of leakage outside the casing, and furthermore, since no pipe cables are used, which limits the frequency of use, it can be used in a wide frequency band.

(f) Embodiments of the Invention The present invention will be described in detail below with reference to illustrated embodiments.

In FIG. 2, A is a perspective view showing essential parts of an embodiment of the present invention, and B is a sectional view of a side plate portion of the housing case.

The microwave unit 20 includes a control system, a transmitting/receiving module such as a power supply (not shown), and a waveguide isolator 12 that is integrated into a box-shaped housing 21 with a shielded structure made of a metal plate. A microwave module 13 is fixed to a mounting plate 16.

A connecting waveguide 10 having flanges 11 on both end faces is connected to one end face of the box-shaped waveguide isolator 12 . Furthermore, a box-shaped microwave module 13 is fixed to the other end face of the waveguide type isolator 12. A connecting hole having a predetermined inner diameter determined by a desired frequency is connected to the opposing end surfaces of the waveguide isolator 12 and the microwave module 13, respectively.
After the waveguide isolator 12 and the microwave module 13 are individually adjusted, their end surfaces are fixed in close contact so that the connection holes are aligned, and they are mechanically and electrically connected. After that, both are combined and adjusted.

In this way, the connecting waveguide 10, waveguide type isolator 12, and microwave module 13 are mechanically and electrically integrated.

A connection hole 23 having the same inner diameter as the connection waveguide 10 is bored at a desired location on the side plate 22 of the housing casing 21 . The flange 11 of the connection waveguide 10 is tightly fixed inside the connection hole 23 .
Further, the external waveguide 14, which is a transmission path outside the housing casing 21, is connected to a location corresponding to the connection hole 23 on the outside of the side plate 22 with the end face of its flange 15 in close contact.

As described above, since the waveguide isolator 12 and the microwave module 13 are combined and integrated and then mounted in the housing housing 21, the housing housing 21
There is no need to worry about having to make adjustments again after implementation.
Further, the microwave module 13 and the waveguide type isolator 12 are directly coupled, and a coaxial connector,
It is compact because it is not connected via pipe cables or the like. Furthermore, the microwave module 1 mounted in the accommodation housing 21 from the external waveguide 14
All up to 3 are connected by a waveguide structure, so
There are almost no restrictions on the frequencies used.

(g) Effects of the Invention As explained above, the present invention is such that the connecting waveguide, the waveguide type isolator, and the microwave module are directly connected and integrated, and after complex adjustment, the waveguide is mounted in the housing. It has excellent practical effects such as stable electrical characteristics, low transmission loss, easy shield mounting, small size, and can be applied to transmitting/receiving panels in a wide range of frequency bands.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing the structure of a conventional microwave unit, Fig. 2 is a perspective view showing important parts of an embodiment of the present invention; FIG. In the figure, 1 and 20 are microwave units, 2 and 21
is a housing case, 3 is an interface waveguide, 4 is
1 is a coaxial isolator, 5 and 13 are microwave modules, 7 is a pipe cable, 10 is a connecting waveguide, 12 is a waveguide isolator, 14 is an external waveguide, and 23 is a connecting hole.

Claims (1)

[Claims] 1. A waveguide for external connection and a waveguide type isolator,
The microwave module is electrically and mechanically integrated on the left and right sides of a waveguide isolator in the center, and the external connection waveguide is attached to one side of the box-shaped housing that houses the microwave module. 1. A microwave unit structure characterized in that a connection hole having an inner diameter dimension is provided, and the inner diameter of the external connection waveguide is fixed to the connection hole.