KR20010066699A - Oscillator with cavity structure - Google Patents

Oscillator with cavity structure Download PDF

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Publication number
KR20010066699A
KR20010066699A KR1019990068581A KR19990068581A KR20010066699A KR 20010066699 A KR20010066699 A KR 20010066699A KR 1019990068581 A KR1019990068581 A KR 1019990068581A KR 19990068581 A KR19990068581 A KR 19990068581A KR 20010066699 A KR20010066699 A KR 20010066699A
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South Korea
Prior art keywords
cavity
oscillator
oscillation frequency
dro
tuning screw
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KR1019990068581A
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Korean (ko)
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문정우
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송재인
엘지이노텍(주)
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Priority to KR1019990068581A priority Critical patent/KR20010066699A/en
Publication of KR20010066699A publication Critical patent/KR20010066699A/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00Resonators of the waveguide type
    • H01P7/10Dielectric resonators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/207Hollow waveguide filters
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00Resonators of the waveguide type
    • H01P7/06Cavity resonators

Abstract

PURPOSE: A cavity oscillator is provided, in which a piezo-electric ceramic is employed to adjust oscillation frequency, to thereby allow the oscillation frequency to be easily adjusted, while lengthening useful life of the oscillator. CONSTITUTION: A cavity oscillator comprises a cavity(C) formed by wrapping a predetermined space with a conductive material; a dielectric resonator-oscillator(DRO)(10) installed at the bottom surface of the cavity, and which generates and outputs oscillation frequency upon supply of an input voltage(Vin) from an external source; and a piezo-electric ceramic(20) installed at the inner top surface of the cavity to be opposed to the DRO, and which generates and outputs electrical signals for varying the oscillation frequency of the DRO in accordance with a control voltage(Vc) applied from an external source.

Description

캐비티형 발진기{Oscillator with cavity structure}Cavity oscillator {Oscillator with cavity structure}

본 발명은 전기 진동을 발생시키는 캐비티형 발진기에 관한 것으로서, 특히 압전 세라믹을 이용한 전기적 신호에 의해 발진주파수를 가변시킴으로써 주파수 조정이 보다 용이해질 수 있는 동시에 기존의 동조 나사와 같이 결합력 약화나 이탈이 발생되지 않고 장기간 사용할 수 있는 캐비티형 발진기에 관한 것이다.The present invention relates to a cavity-type oscillator that generates electrical vibration, and in particular, by adjusting the oscillation frequency by an electrical signal using a piezoelectric ceramic, frequency adjustment can be made easier and at the same time, weakening or separation of the coupling force occurs like a conventional tuning screw. Cavity type oscillator that can be used for a long time without using.

일반적으로, 발진기(오실레이터, Oscillator)는 전기적인 지속 진동을 발생하는 장치로 발진을 일으키는 형식에 따라 자려 발진기나 수정발진기, 또 발진 출력 파형에 따라 정현파 발진기, 구형파 발진기, 펄스 발진기 등, 발진 주파수에 저주파 발진기, 가청주파 발진기, 고주파 발진기로 분류된다.In general, oscillators (oscillators, oscillators) are devices that generate electric continuous vibrations. They can grow according to the type of oscillation, oscillator, crystal oscillator, or sine wave, square wave, pulse oscillator, It is classified into low frequency oscillator, audible frequency oscillator, and high frequency oscillator.

상기 발진기 중에서 캐비티(cavity) 구조를 갖는 캐비티형 발진기는 도 1에 도시된 바와 같이 일정 공간을 금속 도체벽으로 감싸는 캐비티(Cavity; C) 내에 유전체 공진기 발진기(Dielectric Resonator Oscillator, DRO; 1)와 일정 길이(H)를 두고 동조 나사(Tuning screw; 2)가 설치되어 있는데, 상기 동조 나사(2)의 하부에는 메탈면(3)이 형성되어 있다.Among the oscillators, the cavity-type oscillator having a cavity structure has a dielectric resonator oscillator (DRO; 1) and a constant in a cavity (C) that surrounds a predetermined space with a metal conductor wall as shown in FIG. 1. A tuning screw 2 is provided with a length H, and a metal surface 3 is formed below the tuning screw 2.

따라서, 상기 동조 나사(2)는 상기 DRO(1)와 동조 나사(2) 간의 높이(H)를 조절하여 상기 DRO(1)의 주파수를 조정함으로써 공진 동작되도록 가변량을 지시하게 된다.Accordingly, the tuning screw 2 instructs the variable amount to be resonant operation by adjusting the height H between the DRO 1 and the tuning screw 2 to adjust the frequency of the DRO 1.

상기와 같이 구성된 종래 기술에 따른 캐비티형 발진기의 동작은, 입력 전압(Vin)이 캐비티(C) 내부로 전달되면서 DRO(1)의 발진주파수 조정을 위해 동조 나사(2)를 회전시키게 된다.In the operation of the cavity-type oscillator according to the prior art configured as described above, while the input voltage Vin is transferred into the cavity C, the tuning screw 2 is rotated to adjust the oscillation frequency of the DRO 1.

그러면, 상기 동조 나사(2)의 회전에 따라 메탈면(3)이 DRO(10) 쪽으로 접근함으로써 상기 DRO(1)와 동조 나사(2) 간의 높이(H)가 증감됨에 따라 주파수 조정 기능이 수행되게 된다.Then, the frequency adjustment function is performed as the height H between the DRO 1 and the tuning screw 2 increases and decreases as the metal surface 3 approaches the DRO 10 as the tuning screw 2 rotates. Will be.

그러나, 종래 경우에는 발진주파수 조정에 한계가 발생하고, 상기 동조 나사(2)의 회전 동작에 따라 나사산이 마모되어 결합력이 약화되어 동조 나사(2)가이탈될 수 있는 우려가 있다는 문제점이 있다.However, in the conventional case, there is a problem in that the oscillation frequency is adjusted, and there is a concern that the thread is worn by the rotational operation of the tuning screw 2 and the coupling force is weakened, so that the tuning screw 2 may be detached.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 그 목적은 압전 세라믹을 이용하여 발진주파수 조정을 수행하므로 주파수 조정 범위가 확대될 수 있고 주파수 조정이 보다 용이해질 수 있는 동시에 기존의 동조 나사와 같이 결합력 약화나 이탈이 발생되지 않고 장기간 사용할 수 있는 캐비티형 발진기를 제공하는데 있다.The present invention has been made to solve the above problems of the prior art, the object of which is to adjust the oscillation frequency using a piezoelectric ceramic, so that the frequency adjustment range can be expanded and the frequency adjustment can be made easier and at the same time It is to provide a cavity-type oscillator that can be used for a long time without coupling weakness or separation like a tuning screw.

도 1은 종래 기술에 따른 캐비티형 발진기의 구조가 도시된 도면,1 is a view showing the structure of a cavity-type oscillator according to the prior art,

도 2는 본 발명에 따른 캐비티형 발진기의 구조가 도시된 도면.2 is a view showing the structure of the cavity-type oscillator according to the present invention.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

C : 캐비티 10 : DROC: Cavity 10: DRO

20 : 압전 세라믹 Vc : 제어전압20: piezoelectric ceramic Vc: control voltage

Vin : 입력전압Vin: Input Voltage

상기한 과제를 해결하기 위한 본 발명에 의한 캐비티형 발진기의 제1 특징에 따르면, 일정 공간을 도전성 물질로 감싸도록 형성된 캐비티(Cavity)와, 상기 캐비티 외부에서 입력전압이 공급되면 발진주파수를 생성 출력시키도록 캐비티 내부에 설치된 공진 발진부와; 상기 공진 발진부와 일정 간격을 두고 상기 캐비티 내에 설치되고 제어전압에 따라 상기 발진주파수를 가변시키기 위한 전기적 신호가 생성 출력되는 압전부를 포함하여 구성된다.According to a first aspect of the cavity-type oscillator according to the present invention for solving the above problems, a cavity (cavity) formed to surround a predetermined space with a conductive material, and generates an oscillation frequency when the input voltage is supplied from the outside of the cavity A resonant oscillation unit installed in the cavity to make it; And a piezoelectric part installed in the cavity at a predetermined interval from the resonance oscillator and generating and outputting an electrical signal for varying the oscillation frequency according to a control voltage.

또한 본 발명의 제2 특징에 따르면, 상기 압전부는 세라믹(Ceramic) 재질로 형성된다.In addition, according to the second aspect of the present invention, the piezoelectric part is formed of a ceramic material.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 캐비티형 발진기의 구성이 도시된 도면으로서 이를 참고하면 본 발명은, 일정 공간을 도전성 물질로 감싸도록 형성된 캐비티(Cavity; C)와, 상기 캐비티(C) 외부에서 입력전압(Vin)이 공급되면 발진주파수를 생성 출력시키도록 캐비티(C) 바닥면에 설치된 유전체 공진기 발진기(DRO; 10)와; 상기 DRO(10)와 대향 방향에서 상기 캐비티(C) 상부면에 설치되고 외부에서 인가되는 제어전압(Vc)에 따라 상기 DRO(10)의 발진주파수를 가변시키기 위한 전기적 신호를 생성 출력시키는 압전 세라믹(20)으로 구성된다.2 is a view illustrating a configuration of a cavity-type oscillator according to the present invention. Referring to the present invention, a cavity (C) formed to surround a predetermined space with a conductive material and an input voltage outside the cavity (C) are illustrated. A dielectric resonator oscillator (DRO) 10 provided on the bottom surface of the cavity C to generate and output an oscillation frequency when Vin is supplied; Piezoelectric ceramics that generate and output an electrical signal for varying the oscillation frequency of the DRO 10 according to a control voltage Vc applied to the outside of the cavity C and applied from the outside in a direction opposite to the DRO 10. It consists of 20.

상기와 같이 구성된 본 발명의 동작은, 외부에서 캐비티(C)로 입력전압(Vin)이 공급되면 DRO(10)를 통해 발진주파수를 생성 출력시키게 되는데 상기 발진주파수의 가변량을 조절하기 위해 압전 세라믹(20)을 이용하게 된다.In the operation of the present invention configured as described above, when the input voltage Vin is supplied to the cavity C from the outside, the oscillation frequency is generated and output through the DRO 10. The piezoelectric ceramic is used to adjust the variable amount of the oscillation frequency. (20) is used.

즉, 상기 압전 세라믹(20)은 기계적 에너지와 전기적 에너지 사이의 변환이 가능한 것으로서 제어전압(Vc)에 따른 전기적 신호가 생성되어 상기 DRO(10)에 전달되게 되면 상기 발진주파수가 적정하게 가변되게 된다.That is, the piezoelectric ceramic 20 is capable of converting between mechanical energy and electrical energy. When an electrical signal generated according to a control voltage Vc is generated and transmitted to the DRO 10, the oscillation frequency is appropriately changed. .

상기와 같이 구성되는 본 발명의 캐비티형 발진기는 압전 세라믹을 이용한 전기적 신호에 의해 발진주파수 조정을 수행하므로 주파수 조정 범위가 확대될 수 있고 주파수 조정이 보다 용이해질 수 있는 동시에 기존의 동조 나사와 같이 결합력 약화나 이탈이 발생되지 않고 장기간 사용할 수 있는 효과가 있다.Cavity-type oscillator of the present invention configured as described above performs the oscillation frequency adjustment by the electrical signal using a piezoelectric ceramic, so that the frequency adjustment range can be extended and the frequency adjustment can be easier and at the same time as the conventional tuning screw There is no effect of weakening or dropping can be used for a long time.

Claims (2)

일정 공간을 도전성 물질로 감싸도록 형성된 캐비티(Cavity)와, 상기 캐비티 외부에서 입력전압이 공급되면 발진주파수를 생성 출력시키도록 캐비티 내부에 설치된 공진 발진부와; 상기 공진 발진부와 일정 간격을 두고 상기 캐비티 내에 설치되고 제어전압에 따라 상기 발진주파수를 가변시키기 위한 전기적 신호가 생성 출력되는 압전부를 포함하여 구성된 것을 특징으로 하는 캐비티형 발진기.A cavity formed to surround a predetermined space with a conductive material, and a resonance oscillator installed inside the cavity to generate and output an oscillation frequency when an input voltage is supplied from the outside of the cavity; And a piezoelectric part installed in the cavity at a predetermined interval from the resonance oscillator and generating and outputting an electrical signal for varying the oscillation frequency according to a control voltage. 제 1 항에 있어서,The method of claim 1, 상기 압전부는 세라믹(Ceramic) 재질로 형성된 것을 특징으로 하는 캐비티형 발진기.The piezoelectric part is a cavity-type oscillator, characterized in that formed of a ceramic (Ceramic) material.
KR1019990068581A 1999-12-31 1999-12-31 Oscillator with cavity structure KR20010066699A (en)

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