KR930022746A - Low Noise Downlink Frequency Converter for Wideband Reception - Google Patents

Low Noise Downlink Frequency Converter for Wideband Reception

Info

Publication number
KR930022746A
KR930022746A KR1019920006987A KR920006987A KR930022746A KR 930022746 A KR930022746 A KR 930022746A KR 1019920006987 A KR1019920006987 A KR 1019920006987A KR 920006987 A KR920006987 A KR 920006987A KR 930022746 A KR930022746 A KR 930022746A
Authority
KR
South Korea
Prior art keywords
local oscillator
voltage
pass filter
low pass
band
Prior art date
Application number
KR1019920006987A
Other languages
Korean (ko)
Other versions
KR970006772B1 (en
Inventor
유덕배
Original Assignee
정장호
금성정보통신 주식회사
Filing date
Publication date
Application filed by 정장호, 금성정보통신 주식회사 filed Critical 정장호
Priority to KR1019920006987A priority Critical patent/KR970006772B1/en
Priority claimed from KR1019920006987A external-priority patent/KR970006772B1/en
Publication of KR930022746A publication Critical patent/KR930022746A/en
Application granted granted Critical
Publication of KR970006772B1 publication Critical patent/KR970006772B1/en

Links

Abstract

본 발명은 바랙터(튜닝 다이오드)와 전압 바이어스를 이용한 유전체 공진 발진기(Dielectric Resonator Oscillator:DRO)를 사용하여 쿠밴드(Ku-Band)에 있어서 전대역(10.95~12.75GHz)을 수신할 수 있도록 하는 광대역 수신용 저잡음 하향 주파수 변환기(Low Noise Blockdown Converter:LNB)에 관한 것으로서, 제2로우패스필터의 출력단에 연결되어 튜너의 전압을 감지하고 전원정류하는 전압 검출회로와, 상기 전압 검출회로의 출력신호에 따라 국부 발진기로 바이어스 전압을 공급하는 전압제어부와, 상기 국부 발진기 및 전압 제어부에 병렬 접속되어 국부 발진기를 튜닝작용을 하는 바랙터 및 코일과, 상기 국부 발진기와 믹서회로사이에 연결되어 국부 발진기의 불요파를 제거하는 밴드 패스필터로 이루어져FET 바이어스전압을 가변시켜 둘 이상의 주파수에서 발진하도록 하여 넓은 대역의 주파수를 수신할 수 있도록 함은 물론 간단한 구성으로 인한 제조원가 절감과 부피를 현저히 감소시켜 소형화가 가능하도록 하는 효과를 제공하게 되는 것이다.The present invention uses a dielectric resonator oscillator (DRO) using a varactor (tuning diode) and a voltage bias to provide full bandwidth (10.95 to 12.75 GHz) in a ku-band. The present invention relates to a low noise block frequency converter (LNB) for receiving, comprising: a voltage detection circuit connected to an output terminal of a second low pass filter for sensing a voltage of a tuner and rectifying a power supply; and an output signal of the voltage detection circuit. Therefore, a voltage control unit for supplying a bias voltage to a local oscillator, a varactor and a coil connected in parallel to the local oscillator and the voltage control unit to tune a local oscillator, and connected between the local oscillator and the mixer circuit, are unnecessary of the local oscillator. It consists of a band pass filter that removes the wave, which varies the FET bias voltage to oscillate at two or more frequencies. It is possible to receive the frequency of the band, as well as to reduce the manufacturing cost and volume due to the simple configuration to provide the effect that can be miniaturized.

Description

광대역 수신용 저잡음 하향 주파수 변환기Low Noise Downlink Frequency Converter for Wideband Reception

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 광대역 수신 저잡음 하향 주파수 변환기의 블럭도.1 is a block diagram of a wideband receive low noise downlink frequency converter.

제2도는 본 발명의 광대역 수신 저잡음 하향 주파수 변환기의 블럭도.2 is a block diagram of a wideband receive low noise downlink frequency converter of the present invention.

제3도는 본 발명에 따른 국부 발진기의 유전체 공진 발진기의 회로도.3 is a circuit diagram of a dielectric resonator oscillator of a local oscillator according to the present invention.

Claims (1)

입력 고주파의 신호를 3단 저잡음 증폭하는 제1증폭부와, 사기 제1증폭부의 출력주파수를 중간주파수로 변환하여 제1로우패스필터에 공급하는 믹서회로와, 상기 제1로우패스필터의 출력단에 연결되어 중간주파수를 일정레벨로 증폭하는 제2증폭부와, 상기 제2증폭부의 출력단과 튜너에 연결되어 전원과 중간주파수를 상호 간섭하지 않도록 하고, 소정 주파수 대역만을 통과시키는 제2로우패스필터로 이루어지는 저잡음 하향 주파수 변환기에 있어서, 상기 제2로우패스필터의 출력단에 연결되어 튜너의 전압을 감지하고 전원전류하는 전압 검출회로와, 상기 전압 검출회로의 출력신호에 따라 국부 발진기로 바이어스 전압을 공급하는 전압제어부와, 상기 국부 발진기 및 전압 제어부에 병렬 접속되어 국부 발진기를 튜닝작용을 하는 바랙터 및 코일과, 상기 국부 발진기와 믹서회로 사이에 연결되어 국부 발진기의 불요파를 제거하는 밴드 패스필터가 포함되는 광대역 수신용 저잡음 하향 주파수 변환기.A first amplifier for amplifying three low-noise signals of the input high frequency signal, a mixer circuit for converting the output frequency of the first amplifier to an intermediate frequency and supplying the first low pass filter to the first low pass filter, and an output terminal of the first low pass filter. A second low pass filter connected to the second amplifier for amplifying the intermediate frequency to a predetermined level and the output terminal and the tuner of the second amplifier so as not to interfere with the power and the intermediate frequency, and passing only a predetermined frequency band. A low noise down frequency converter comprising: a voltage detection circuit connected to an output terminal of the second low pass filter for sensing a voltage of a tuner and supplying current, and supplying a bias voltage to a local oscillator according to an output signal of the voltage detection circuit; A varactor and a coil connected in parallel to the voltage control unit, the local oscillator and the voltage control unit to tune a local oscillator; Group local oscillator and mixer circuit can be connected between a broadband that includes the band-pass filter for removing the unnecessary wave of the local oscillator credit low-noise down-frequency converter. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920006987A 1992-04-24 1992-04-24 Wideband receiving low down frequency converter KR970006772B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920006987A KR970006772B1 (en) 1992-04-24 1992-04-24 Wideband receiving low down frequency converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920006987A KR970006772B1 (en) 1992-04-24 1992-04-24 Wideband receiving low down frequency converter

Publications (2)

Publication Number Publication Date
KR930022746A true KR930022746A (en) 1993-11-24
KR970006772B1 KR970006772B1 (en) 1997-04-30

Family

ID=19332286

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920006987A KR970006772B1 (en) 1992-04-24 1992-04-24 Wideband receiving low down frequency converter

Country Status (1)

Country Link
KR (1) KR970006772B1 (en)

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