UP MIXER FOR RF TRANSMITTER/RECEIVER AND METHOD FOR DESIGNING THE SAME

UP MIXER FOR RF TRANSMITTER/RECEIVER AND METHOD FOR DESIGNING THE SAME

PURPOSE: An up mixer for RF transmitter/receiver and a method for designing the same are provided to separate an RF signal from a signal of a local oscillator by using a CGCS(Common Gate Common Source) structure and obtain a low conversion loss and a variable gain characteristic by using a cascode m...

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Bibliographische Detailangaben
Hauptverfasser: JUNG, MYEONG NAM, YOON, CHAN UI, PYO, HYEON MYEONG
Format: Patent
Sprache:eng ; kor
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
GENERATION OF NOISE BY SUCH CIRCUITS
GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER
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Beschreibung
Zusammenfassung:PURPOSE: An up mixer for RF transmitter/receiver and a method for designing the same are provided to separate an RF signal from a signal of a local oscillator by using a CGCS(Common Gate Common Source) structure and obtain a low conversion loss and a variable gain characteristic by using a cascode matching amplification circuit. CONSTITUTION: An RF input port(11) is formed at an input stage of a frequency converter. A grounding pad(12) is formed to both sides of the RF input port. The first field effect transistor(FET1) is connected with one side of the RF input port. The first capacitor(C1) and the first inductor(L1) are used for performing a direct current interception function and a direct current feeder function. An input terminal matching portion is formed with the RF input port(11), the grounding pad(12), the first field effect transistor(FET1), the first capacitor(C1), and the first inductor(L1). A cascode matching amplification portion(20) performs a matching process to obtain an output power of a maximum gain. An output terminal matching portion(30) is used for matching the cascode matching amplification portion(20) with an output impedance. 본 발명은 고주파(RF) 송/수신부용 주파수 혼합기(Up Mixer) 및 그 설계 방법에 관한 것으로, 공통게이트/공통소스 구조를 사용하여 국부 발진기(LO)신호와, 고주파(RF) 신호를 격리하고, 캐스코드(Cascode) 정합 증폭회로를 이용하여 낮은 변환 손실을 얻으며, 가변이득 특성을 얻을 수 있는 고주파(RF) 송/수신부용 주파수 혼합기(Up Mixer) 기술로써, 이는 기생주파수를 최적화 시키며, 인접 채널 신호의 대역폭을 보장할 수 있도록 캐스코드 정합회로를 적용하여, 선형성이 유지될 수 있도록 하는 잇점이 있다.