Rain Attenuation Study over an 18 GHz Terrestrial Microwave Link in South Korea

Table 1

The 18 GHz link descriptions [24].

Descriptions	Specification
Antenna type	Front-fed parabolic
Frequency band (GHz)	17.7~18.2
Polarization (@ Khumdang, KT Station) tower	Vertical
Polarization (@ Icheon, RRA Station) tower	Vertical for antenna 1, horizontal for antenna 2
Maximum transmit power (W or dBm)	0.16 or +22
Reception method	Super heterodyne
Modulation	QPSK
Maximum modulation degree	8-bit/Hz
Radio throughput	367 Mbps
Electronic power and amplifier	Monolithic microwave integrated circuit (MMIC) with 12 VDC power supply and −10 dBm input signal
BER received threshold (for horizontal polarization) (dBm)	−52.3
BER received threshold (for vertical polarization) (dBm)	−32.8
Half power beam width	1.9°
Antenna for both transmitting and receiving side
Size (m)	0.6
Gain (dBi)	38.8