표 2. | Table 2. 저궤도 위성 데이터링크용 X-대역 안테나 | Transmission antennas for LEO satellite datalink.

Antenna type	Reference	Dimension	Polarization	Operating frequency (GHz)	Gain (dBic)
Corrugated horn	[18]	87.9 mm	LHCP & RHCP	7.7∼8.5	15.9
	[19]	-	LHCP & RHCP	7.9∼8.5	16.8
	[20]	132.1 mm	LHCP & RHCP	8.0∼8.4	17.3
Patch array	[21]	82 mm×98 mm	RHCP	8.0∼8.4	16
	[22]	110 mm×110 mm	RHCP	7.2∼9	17
	[23]	400 mm×400 mm	LHCP & RHCP	7.9∼8.4	26
Choke-ring horn	[24]	242.6 mm	LHCP & RHCP	8.025∼8.4	7.7
	[25]	320 mm	LHCP & RHCP	8.025∼8.4	6
	[26]	270 mm	LHCP & RHCP	8.025∼8.4	6.08
Helix	[27]	90 mm	LHCP & RHCP	7.8, 8.0∼8.4	5.8
	[28]	12.3 mm	RHCP	8.0∼8.45	8.7