MMIC 이중평형 주파수 혼합기의 선형성 개선을 위한 LO Power 최적화 연구
A Study on Optimization of LO Power for Improving Linearity in MMIC Double Balanced Mixer
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초록
본 논문에서는 이동통신대역에 사용 가능한 MMIC(Monolithic Microwave Integrated Circuits) 이중평형 주파수 혼합기(Double Balanced Mixer)를 설계하고 LO 전력 최적화에 관한 연구를 다룬다. 본 논문에서 제안한 MMIC 이중평형 주파수 혼합기의 칩 크기는 4 ×4 [mm2]이며, GaAs 기판을 사용한다. LO power에 대한 최적화 연구는 입력신호의 선형성에대한 Input IP3(IIP3)에 대해서 진행하며, LO power＋16 dBm을 인가했을 때 IIP3성분이 약 23.2dBm을 보여 가장 우수한 특성을 나타내었다.
Abstract
In this paper, a MMIC double balanced mixer that can be applied to the tele－communication band is designed and LO power optimization for the mixer is discussed. The chip of the MMIC double－balanced mixer is fabricated on GaAs substrate with the size of 4×4 mm2. Optimization study of LO power for the MMIC double－balanced mixer proposed in this paper is conducted for the Input IP3 (IIP3) regarding on the linearity of the input signal. When LO power level of＋16 dBm is applied to the mixer, IIP3 is obtained to be approximately 23.2 dBm, which is the most outstanding characteristic.
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