Wireless PtP system in E-band for gigabit ethernet

In this paper, wireless PtP system in E-band (70/80 GHz) for gigabit ethernet link was designed and fabricated. To two-way communication of FDD(frequency division diplexing), two types of transmitter/receiver were made. The conversion gains of transmitter were 7-12 dB and 15-25 dB respectively and P1dBs were both max 16 dBm. The conversion gains of receiver were -6-0 dB and 10-20 dB respectively. Two PLOs were fabricated for 36.75 GHz and 41.75 GHz. The output powers were both 9 dBm and phase noises at 100 KHz offset were -103 dBc/Hz and -102 dBc/Hz respectively. OOK(On Off Keying) modulation was used in fabricated system. For OOK modulation, OOK modulator and demodulator were designed and fabricated. OOK modulator was made with RF mixer and OOK demodulator was made up of schottky diode and limiter amp. An demonstration for two-way communications was performed at indoor environment. It showed that this PtP system was well done in 10 M distance with +5 dBm output power and 20 dB gain horn antenna.