JPS6035283Y2 - microwave equipment - Google Patents

Description

[Detailed description of the invention] The present invention consists of a dielectric substrate on which a microwave integrated circuit constructed using microstrip lines is formed, and a carrier plate for fixing the dielectric substrate. Regarding equipment.

Here, the structure in which a microwave integrated circuit using microstrip lines is formed on a dielectric substrate is shown in Figure 1a.
Shown in b.

That is, a microwave circuit section 2 is provided on a dielectric substrate 1, and this microwave circuit section 2 has input/output line terminals 3a,
3b is provided.

The dielectric substrate 1 includes a carrier plate 4 made of a metal plate.
It is fixed with solder or conductive adhesive.

The carrier plate 4 is provided with screw holes 5a to 5d for fixing the carrier plate to the case.

Figure 2a shows the structure when multiple microwave circuits shown in Figure 1 are used and assembled into a case.

Shown in b.

That is, the microwave circuits 6a to 6c shown in FIG. 1 are attached to a case 7, and this case 7 is provided with an input/output connector.

Input/output line terminals 3a, 3b of each microwave circuit section 2
are connected by metal foils 9-a to 9-b.

By the way, in the microwave device shown in FIG. 2, in order to suppress the waveguide mode excited in the case 7, the inner dimension a of the case 7 is set to be larger than the free space wavelength of the operating frequency.

For a〈enter. /2.

Although the width of the dielectric substrate 1 can generally be made narrower as the operating frequency becomes higher, the width of the carrier plate 4 cannot be made narrower in many cases due to limitations in the dimensions of machines such as screws.

Therefore, the carrier plate 1 as shown in FIG.
1 was sometimes used.

That is, as shown in FIGS. 3a and 3b, the carrier plate 11 is formed in a generally concave shape with side walls provided on both sides, and the side walls have screw holes for fixing the carrier plate to the case. 12a to 12d are provided.

Reference numeral 10 denotes a dielectric substrate on which a microwave circuit section is constructed.

The structure of this carrier plate 11 assembled into a case is shown in FIGS. 4a and 4b.

That is, a plurality of carrier plates 13a to 13c to which dielectric substrates 14a to 14c are attached are arranged in parallel in a case 15, and this case 15 has input/output connectors 16a and 16.
b is provided.

In this case, since the frequency at which the waveguide mode is excited is already determined by the inner dimensions of the carrier plates 13a to 13c, the upper limit of the usable frequency is higher than in the case of FIG.

However, even with this structure, the carrier plates 13a~
Gaps 17-a and 17-b are created at the connection between 13c.

Since the waveguide mode is excited in this gap, it becomes a parasitic reactance, which has the drawback of adversely affecting the matching characteristics of the microwave circuit.

The present invention eliminates the above-mentioned drawbacks, and when a plurality of carrier plates having microwave integrated circuits configured with microstrip lines mounted on a dielectric substrate are assembled into a case, grooves are formed on the side wall end surfaces of the carrier plates. established,
A waveguide that is excited in the case by inserting a spring member between opposing grooves or by providing a groove and a protrusion on the side wall end surfaces to create an electrically short-circuit between the side wall end surfaces and excitation within the case. It is an object of the present invention to provide a microwave device that suppresses the mode and prevents the microwave characteristics from deteriorating.

Embodiments of the present invention will be described in detail below with reference to the drawings.

5 and 6 show an embodiment of the present invention.

That is, as shown in FIGS. 5a and 5b, a microwave integrated circuit 22 configured using a microstrip line is provided on a dielectric substrate 21, and this microwave integrated circuit 2
2 has an input/output line terminal 23a.

23b is provided.

The dielectric substrate 21 is fixed to a carrier plate 24 made of a metal plate, and the carrier plate 24 is formed into a concave shape with side walls provided on both sides.

Grooves 25at 25b, 25c, and 25d are provided in the side wall end surface of the carrier plate 24 in the vertical direction, respectively.

The carrier plate 24 has screw holes 26 a, 26 b, 2 for fixing the carrier plate to the case.
6c and 26d are provided.

FIG. 6 shows a structure in which the carrier plate 24 is assembled into a case.

That is, a carrier plate 2 as shown in FIG.
4a, 24b, 24c are fixed, and the carrier plate 2
Spring members 29at 29 each made of a metal piece are provided between the opposing grooves 25a to 25d of the connecting portions 4a to 24c.
bt 29ct 29d is inserted.

Metal foils 30a and 30 are placed between the input and output line terminals 23a and 23b.
Connected at b.

Therefore, the gaps generated between the carrier plates 24a to 24b are short-circuited by the spring members 29a to 29d made of metal pieces, so that the excitation of the waveguide mode can be suppressed.

Moreover, by making the spring members 29a to 29d wave-shaped, they function as springs and create gaps.

The carrier plate according to another embodiment and the structure when the carrier plate is assembled into the case are shown in FIGS. 7a and 7b and FIG. 8.

In FIGS. 7 and 8, the same parts as in FIGS. 5 and 6 are designated by the same numbers, and the explanation thereof will be omitted.

That is, in this embodiment, the protrusions 42a and 42b are provided on one end surface of the side wall of the carrier plate 41, and the grooves 43a*43b are provided on the other end surface to form a connection portion, and when assembled into the case 28, The connecting portion is the protruding portion 42a, 4
2b is inserted into the grooves 43a and 43b.

In this case, the gap between the fitting parts is narrow and the high frequency impedance is almost short-circuited, so that the influence of this gap on the microwave characteristics can be sufficiently reduced.

Furthermore, because of the fitting structure, the individual carrier plates can be easily assembled into the case.

As described above, according to the present invention, it is easy to reduce the width of the circuit section through which the microwave signal propagates to less than half the spatial wavelength of the frequency used, and the gap between the carrier plates is It is possible to provide a microwave device that eliminates the influence on

[Brief explanation of the drawing]

Figures 1a and b are top and end views showing the structure of a conventional microwave integrated circuit, and Figures 2a and b are top and end views showing the microwave integrated circuit of Figure 1 assembled into a case. Cross-sectional view taken along line XX', Figure 3a. 4b is a top view and an end view showing the structure of a conventional microwave integrated circuit; FIGS. 4a and 4b are a top view and an end view showing the microwave integrated circuit of FIG.
Figures a and b are a top view and an end view showing an embodiment of the present invention,
6 is a top view showing the microwave integrated circuit of FIG. 5 assembled into a case, FIGS. 7a and 7b are top and end views showing other embodiments of the present invention, and FIG. FIG. 7 is a top view showing a state in which the seventh microwave integrated circuit is assembled into the case. 21...Dielectric substrate, 22...Microwave integrated circuit, 24...Carrier plate, 2
5a-25d...Groove portion, 28...Case, 29a-29d...Spring member.

Claims (3)

[Scope of utility model registration request] (1) a dielectric substrate on which a microwave integrated circuit configured using a microstrip line is formed; side walls on both sides; the dielectric substrate is disposed between the side walls;
and a plurality of carrier plates arranged such that their respective side wall end faces are adjacent to each other, a groove is provided on at least one of the mutually adjacent side wall end faces of each carrier plate, and the groove is used to connect the side wall end faces. A microwave device characterized by an electrical short circuit. (2) Utility model registration claim 1, characterized in that the electrical short circuit between the end faces of the side walls is achieved by providing grooves in both of the end faces of the side walls adjacent to each other, and using a metal spring member disposed between the grooves. Microwave device as described in section. (3) The electrical short circuit between the side wall end faces is achieved by providing a groove on one side of the mutually adjacent side wall end faces, and providing a protrusion on the other side to be inserted into the groove, using the groove and the protrusion. A microwave device according to claim 1 of the utility model registration claim.