JPS60117801A - Mic oscillator - Google Patents

Abstract

PURPOSE:To facilitate easy control of resonance frequency regardless of an airtight sealing structure by storing a dielectric resonator into a hole drilled nearly at the center of a stem along with a slot line connected to a microstrip line provided on the rear side of the stem and at the same time providing a resonance frequency control mechanism at the side surface of the stem. CONSTITUTION:A dielectric resonator 4 is attached within a store hole 111 for dielectric resonator. Then an airtight terminal 8 and a bias terminal 17 are inserted into an airtight terminal hole 112 and a bias terminal hole 114 respectively and sealed airtight. Then a frequency control screw 13 is driven into a frequency control screw hole 113 corresponding to the resonator 4. Under such conditions, a ceramic substrate 2 containing a microstrip 3 and a dielectric substance consisting of a slot line 15 formed on the rear side of the line 3 is adhered airtight to a prescribed position of a stem 11. Then the frequency is controlled to a prescribed level by the screw 13, and the hole 111 of the stem 11 is closed with a cover 16.

Description

Detailed Description of the Invention fa) Technical Field of the Invention The present invention relates to an MI
Related to C oscillators, in particular, MTC that houses a dielectric resonator in the stem and allows easy adjustment of the resonant frequency.
It concerns oscillators.

(bl Technology background) MICs typically combine a microstrip line that forms an electronic circuit on a ceramic substrate with active components such as transistors to generate a single amplified oscillation.

Functions such as modulation and demodulation are provided, but when transistors, etc. are incorporated as semiconductor chips due to miniaturization, the package containing them must be sealed with a cover plate, and after being sealed, it cannot be accessed from the outside. Therefore, there is a strong demand for the development of a MIC oscillator that can easily achieve the desired characteristics externally.

(C) Prior Art and Problems Figure 1 is a side sectional view for explaining a conventional MIC oscillator. After bonding the ceramic substrate 2 and arranging the dielectric resonator 4 and the transistor 7 on the ceramic substrate 2,
After attaching a dielectric resonator housing 5 equipped with a frequency adjustment screw 6 and attaching an airtight output terminal 8 to the output end of the microstrip line 3, the resonant frequency is adjusted by the frequency adjustment screw 6. The cover plate 9 is carefully adjusted to achieve airtight sealing. However, when this airtight sealing is performed, there is a problem in that readjustment is impossible if an error occurs in the frequency due to aging.

(d) Purpose of the Invention In view of the conventional problems described in
It is an object of the present invention to provide a MIC oscillator that can be easily tuned.

(Ql) Structure of the Invention In order to achieve the above-mentioned object, the present invention includes bonding a dielectric substrate on which a microstrip line is formed on a stem, and arranging a dielectric resonator on the dielectric substrate. Naru MI
In the C oscillator, a hole for accommodating the dielectric resonator is provided substantially in the center of the stem, and the hole for accommodating the dielectric resonator is provided;
This is achieved by providing a slot line coupled to the microstrip line on the back surface of the dielectric substrate corresponding to the hole, and providing a resonant frequency adjustment mechanism on the side surface of the stem.

Embodiments of the Invention Hereinafter, embodiments of the MIC oscillator according to the present invention will be described in detail with reference to the drawings.

FIG. 2 is a side sectional view for explaining an embodiment of the present invention. FIG. 2(b) is a rear view, and the same parts as in FIG. 1 are designated by the same reference numerals ((j).

A dielectric resonator 4 is mounted on a stem 11 made of metal such as brass.
and a dielectric resonator housing hole 111 that accommodates the.

An airtight output end type through hole 1121, a frequency through hole 113, and a bias terminal insertion hole 114 are formed, and the dielectric material is inserted into the dielectric resonator housing hole 111 through a spacer 12 made of a material having a low dielectric constant, such as quartz. The resonator 4 is attached, and the airtight terminal 8 is inserted into the airtight terminal insertion hole 112, and the bias terminal 1 is inserted into the airtight terminal insertion hole 112.
7 were respectively inserted into the bias terminal insertion holes 114 and hermetically sealed, and the frequency adjustment screws 13 comprising a rotor I□ 14 were screwed into the frequency adjustment screw holes 113 corresponding to the dielectric resonators 4. In this state, a microstrip line 3 and, for example, a ceramic substrate 2 made of a dielectric material with a slot line 15 formed on the back surface of the microstrip line 3 are hermetically bonded to a predetermined position of the step J211. A plurality of active elements such as transistors 7 are mounted on the microstrip line 3 side to form a circuit, and the end of the microstrip line 3 is connected to an airtight output terminal 8 formed by airtightly inserting the end of the microstrip line 3 into the stem 11. Afterwards, the cover plate 17 is hermetically sealed to the stem 11 by adhesive.

And the frequency #circumference adjustment 13 corresponding to the dielectric resonator 4
After adjusting the resonant frequency to a predetermined value, the dielectric resonator housing hole 111 formed in the stem 11 is closed with a lid 16. FIG. 3 is a sectional view taken along the line AA' in FIG. 2, showing the relationship between the dielectric resonator 4, the microstrip line 3 and the slot line 15 disposed on both sides of the ceramic substrate 2.

FIGS. 4 and 5 are side views for explaining magnetic field coupling, with reference numeral 19 indicating a magnetic pole and 20 indicating a magnetic field.

(g+ Effects of the Invention) As is clear from the above explanation, the MIC oscillator according to the present invention allows the resonance frequency to be adjusted after being sealed, compared to the conventional structure in which dielectric materials are placed in a tightly packed enclosure. Therefore, it contributes to the frequency gllII adjustment work efficiency and the work efficiency, and there is an advantage that the quality of the product can be expected to be improved and the cost can be reduced.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional MIC oscillator.
FIG. 2 is a diagram for explaining an embodiment of the MIC oscillator according to the present invention. 4 and 5 are side views for explaining magnetic field coupling. In the figures, l and 11 are stems, 2 is a ceramic substrate, 3 is a microstrip line, 4 is a dielectric resonator, and 5 is a stem. 6 and 13 are the dielectric resonator housing, 6 and 13 are the frequency adjustment screws 17 are the transistors, )) are the airtight output terminals, 9 and 17 are the cover plates, 12 is the shield, 16 is a lid, 18 is a bias terminal, 19 is a magnetic pole, 20 is a magnetic field, and 111 is a dielectric resonator housing hole. +12 is the airtight output terminal 1Φ through hole, 113 is the frequency adjustment screw hole, 114 is the bias ☆ (11 child insertion i1!I hole, respectively.)

Claims (1)

[Claims] In the MIC oscillator, a dielectric substrate having a microstrip line formed thereon is bonded to the stem, and a dielectric resonator is disposed on the dielectric substrate. A MIC characterized in that a slot line is provided for coupling the signal to the collecting strip line, and a resonant frequency adjusting mechanism is provided on the side surface of the stem.
oscillator.