| 摘要 |
FIELD: radio engineering. ^ SUBSTANCE: active magnetic antenna with ferrite core comprises ferrite rod with winding, which produce frame magnetic antenna, which is connected to low-noise transistor arranged with the possibility to amplify signal of frame magnetic antenna, besides transistor base is connected directly to one contact of winding, and the second contact of winding is arranged with the possibility to supply shift voltage to transistor base, while impendance of frame magnetic antenna is tuned as complexly coupled with impedance of transistor base in low-noise amplifier, and winding is arranged with the possibility to eliminate own resonances in working frequency band. ^ EFFECT: development of compact antenna with increased sensitivity. ^ 6 cl, 4 dwg |
