出版社：Society for Microwave Technique, Technologies and Systems, Serbia and Montenegro IEEE MTT-S Chapter
摘要：In this paper design and characteristics of a simple direct QPSK modulator for terrestrial point-to-point radio link is presented. This modulator enables compact, low cost and high efficiency transmitter. Good sideband suppression, greater then 25 dB is obtained in frequency range 21.0 to 24.0 GHz, without tuning. The insertion loss is less than 8 dB in 3-GHz bandwidth and the carrier suppression is about 22 dB
