JPH04162806A - Oscillator employing microwave integrated circuit - Google Patents

Abstract

PURPOSE:To extend a frequency variable range by adopting the structure such that no barrier exists between a dielectric resonator and a frequency adjustment screw to vary the oscillating frequency. CONSTITUTION:A microwave integrated circuit board is mounted onto a base part 1 and a dielectric resonator 5 is fixed to the base part 1 via a cylindrical support base, and both open ends of the support base are respectively adhered closely to the base part 1 and the dielectric resonator 5. A cover 6 covers the base part 1 on which both the components are mounted to apply electric shield and air-tight sealing. Then a hole 7 is provided to a mount position of the support base of the base part 1 and a space formed by the inner face of the support base and by a fixed face of the said support base and the dielectric resonator 5 is communicated to an external space via the said hole 7. Moreover, a nut 9 to which a frequency adjustment screw 8 is screwed is fixed to an outer face of the base 1 of the hole 7 to able to fix the frequency adjustment screw 8 to a prescribed position in the space. Thus, the frequency adjustment screw 8 is arranged close to the dielectric resonator 5 and the adjustment range of the oscillating frequency is expanded.

Description

[Detailed description of the invention]

r Industrial Application Field The present invention relates to a microwave integrated circuit oscillator, and in particular,
This invention relates to a microwave integrated circuit oscillator with a wide adjustment range of oscillation frequency.

[Conventional technology]

As shown in FIG. 2, a conventional microwave integrated circuit oscillator has a semiconductor 2 in a paired chip state mounted directly or via a membrane circuit board 3 on a base l, and a support stand is mounted on the base l. A dielectric resonator 5 is fixed via a cap 4, and a lid 6 covers the base 1. Further, a hole 7 is provided in the lid 6 at a position above the dielectric resonator 5, and a nut 9 is provided on the outer surface of the lid 6 so that a frequency adjustment screw 8 can enter and exit the opening 7. ,and,
Inside the open lid 6, there is a gap l which separates the side of the hole 7 from the side of the mounted component on the base 1! 10 are provided. With this configuration, when the components mounted on the base 1 are electrically shielded from the outside, the components 2 are also kept airtight.

【Problems to be solved】

In the conventional microwave integrated circuit oscillator mentioned above, a partition wall was required to maintain airtightness, so the frequency adjustment screw could not be brought close enough to the dielectric resonator, resulting in a narrow adjustment range of the oscillation frequency. There was an issue. The present invention has been made in view of the above-mentioned problems, and is a microwave integrated circuit that has a structure in which no partition wall is present, thereby enabling the frequency adjustment screw to be placed close to the dielectric resonator, thereby expanding the adjustment range of the oscillation frequency. The purpose is to provide an oscillator with [Means for Solving Problem 11] In order to achieve the above object, the invention according to the first claim mounts a microwave integrated circuit board on a base portion to which a dielectric resonator is fixed via a support stand, and The dielectric resonator and microwave integrated circuit board are electrically and airtightly isolated from the outside by a lid that covers the base, and the oscillation frequency is adjusted by placing a frequency adjustment screw close to the dielectric resonator. In the microwave integrated circuit oscillator to be tuned,
The support base is configured to have an opening facing the base portion, and a hole through which the frequency adjustment screw can be inserted into the opening of the support base is provided at a fixing portion of the support base in the base portion. It is. Moreover, the invention according to a second claim is the microwave integrated circuit oscillator according to claim 1, in which the support base is
It is constructed of a cylindrical body, and both ends of the cylindrical body are brought into close contact with the base portion and the dielectric resonator.

[Effect]

In the inventions according to claims 1 and 2 configured as described above, the frequency adjustment screw is inserted into the opening of the support base from the hole in the base, and the frequency adjustment screw and the dielectric resonator are connected to each other. Adjust the frequency by changing the distance from the

【Example】

Hereinafter, the present invention will be explained in detail based on the drawings. FIG. 1 is a sectional view of a microwave integrated circuit oscillator according to an embodiment of the present invention. Note that the same reference numerals are given to the same or common parts as in the conventional art.
“ In the figure, a microwave integrated circuit board is configured by a membrane circuit board 3 equipped with a semiconductor 2 in a paired chip state,
The same microwave integrated circuit board is mounted on the base SL. Furthermore, a dielectric resonator 5 is fixed on the base l via a cylindrical support 4, and both open ends of the support 4 are in close contact with the base 1 and the dielectric resonator 5, respectively. ing. A lid 6 covers the base 1 on which these parts are mounted,
Electrically shielded and hermetically sealed. A hole 7 is provided at the mounting position of the support base 4 in the base portion 1, and a space formed by the inner surface of the support base 4 and the fixing surface of the support base 4 and the dielectric resonator 5 is It communicates with the external space via the opening 7. A nut 9 into which a frequency adjustment screw 8 is screwed is fixed to the outer surface of the base 1 of the opening 7, so that the frequency adjustment screw 8 can be fixed at a predetermined position within the space. Next, the operation of this embodiment having the above configuration will be explained. When changing the oscillation frequency, adjust by moving the frequency adjustment screw 8 closer to or away from the dielectric resonator 5 while screwing into the nut 9. At this time, the frequency adjustment screw 8 is structured so that it approaches the dielectric resonator 5 from the direction of the cylindrical support 4, and is not opposed to the dielectric resonator 5 through a partition wall as in the conventional screw. Therefore, the frequency adjustment screw 8 can be brought closer to the dielectric resonator 5. Therefore, the frequency variable range can also be made sufficiently large. In addition, the lid 6 is not provided with a hole, and the contact portion between the base l and the support 4 and the contact portion between the support 4 and the dielectric resonator 5 are closely connected. , base l
The space formed by the lid 6 and the outside are kept airtight. Therefore, the partition wall provided inside the lid 6, which was conventionally required, is no longer necessary. That is, in this embodiment, a dielectric resonator 5, its support 4, a semiconductor 2 in a bare chip state, and a membrane circuit board 3 are housed in a casing consisting of a base 1 and a lid 6 to form a microwave integrated circuit. When constructing an oscillator, a frequency adjustment screw 8 for adjusting the oscillation frequency is attached in the direction of the base 1 and the support base 4 of the dielectric resonator 5. In the above embodiment, the support base 4 is cylindrical, but it can also be configured to have a cup shape with one end closed and fixed to the base 1 with its opening facing the hole 7.

【Effect of the invention】

As explained above, the present invention has a structure in which there is no partition wall between the frequency adjustment screw for changing the oscillation frequency and the dielectric resonator, so the distance between the frequency adjustment screw and the dielectric resonator is It is possible to provide a microwave integrated circuit oscillator that can make the frequency small and have a wide frequency variable range. Further, since there is no need for a partition wall for maintaining airtightness, there is an effect that the number of parts is reduced and manufacturing costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a microwave integrated circuit oscillator according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional microwave integrated circuit oscillator. l...Base part 2...Semiconductor 3...Membrane circuit board 4...Support stand 5...Dielectric resonator 6.
・・Lid 7・hole 8・frequency adjustment screw 9・
...Natsuto.

Claims (2)

[Claims] (1) A microwave integrated circuit board is mounted on the base to which the dielectric resonator is fixed via a support stand, and the dielectric resonator and the microwave integrated circuit board are mounted using a lid that covers the base. In a microwave integrated circuit oscillator which is electrically and airtightly isolated from the outside and whose oscillation frequency is adjusted by bringing a frequency adjustment screw close to the dielectric resonator, the support base is opened toward the base. A microwave integrated circuit oscillator characterized in that the fixing portion of the support base in the base portion is provided with a hole through which the frequency adjustment screw can be inserted into the opening of the support base. . (2) In the microwave integrated circuit oscillator according to claim 1, the support base is constituted by a cylindrical body, and both ends of the cylindrical body are brought into close contact with the base portion and the dielectric resonator. A microwave integrated circuit oscillator characterized by: