CAJ | 학술논문

提出了一种新型圆极化接收有源集成天线的设计方法，采用有源放大与无源辐射部分一体化设计理念，通过合理改变天线的输出阻抗，直接与低噪声放大器晶体管输入端进行匹配，省去了传统设计中的复杂匹配网络，降低了天线前端的匹配损耗，改善了天线接收系统的噪声和增益。利用此方法设计了一款C波段圆极化接收有源集成天线。测试结果表明：相对于传统设计方法，该方法在方向图和轴比性能基本相同的情况下，阻抗带宽改善了3％，输入端匹配损耗减小了0．3dB，同时简化了电路结构。证明了该方法的有效性。
제출료일충신형원겁화접수유원집성천선적설계방법，채용유원방대여무원복사부분일체화설계이념，통과합리개변천선적수출조항，직접여저조성방대기정체관수입단진행필배，성거료전통설계중적복잡필배망락，강저료천선전단적필배손모，개선료천선접수계통적조성화증익。이용차방법설계료일관C파단원겁화접수유원집성천선。측시결과표명：상대우전통설계방법，해방법재방향도화축비성능기본상동적정황하，조항대관개선료3％，수입단필배손모감소료0．3dB，동시간화료전로결구。증명료해방법적유효성。
A novel circularly polarized receiving active integrated antenna is presented in this paper. By matching the antenna directly to the input of the low noise amplifier（LNA）transistor, the active integrated antenna can completely eliminate the loss of matching networks between antenna and LNA and improve the noise figure and power gain of the receiving antenna system. A C-band circularly polarized receiving active integrated antenna was designed and fabricated. Measured results show that compared to a traditional reference active antenna, the proposed antenna has almost the same radiation pattern and axial ratio,and obtains 3% wider impedance bandwidth and 0. 3 dB lower input matching loss. The validity of this technique is demonstrated.