对于THz 频段的检测器，当器件的尺寸远远小于检测信号的波长时，可以获得快速的响应速度，但耦合信号的能力会下降。为了提高检测器的信号耦合能力，需要借助天线收集信号。因此天线的性能直接决定着器件的响应频段及灵敏度等参数指标。六氮五铌(Nb_{5N6) 微测热辐射计太赫兹检测器采用平面集成天线的方式来耦合信号，平面天线通过微加工技术，经过光刻、剥离等过程，集成在基片上，Nb5N6 置于平面天线的中心。针对0.32 THz 的中心频率，尝试采用电容耦合信号的设计方法，提高了Nb5N6 的信号耦合能力。}

A detector can achieve quick response when it is much smaller than the wavelength of the source signal in THz wave band at the expense of signal coupling capability．Therefore, an antenna is applied to collect signals in order to enhance the signal coupling capability of the detector．The properties of antenna determine the frequency response band，the sensitivity and other parameters of the detector directly. A planar-integrated antenna is adopted for signal acquisition in the Nb_{5N6 microbolometer detector, which is fabricated by lithography，lift-off and other processes of micro-fabrication. The Nb5N6 microbolometer is placed in the center of the planar antenna. Aiming for the center frequency of 0.32 THz, a special capacitive coupling design is proposed to improve the signal coupling capability．}