TW605 Low Noise Choke Ring Antenna Amplifier

Enhanced Signal Clarity with Advanced Filtering and Low Noise

Calian TW605 Low Noise Choke Ring Antenna Amplifier is a low noise amplifier (LNA) optimized for all GNSS bands, designed to upgrade existing choke ring antennas for full GNSS spectrum reception. With 50 dB gain and advanced filtering to suppress out-of-band interference, TW605 enhances signal clarity and enables extended cable runs. Compatible with major choke ring antenna brands, this easy-to-install LNA is ideal for high-performance GNSS applications.

Signals	L1 L2 L5 G1 G2 G3 E1 E5a E5b E6 B1 B2 B3
L-Band (1525-1559MHz)	Yes
Pass band ripple (dB-max)	1164 - 1300: 2.0 1525 - 1610: 1.0
Out of Band Rejection (dB-min)	< 800 MHz: > 65 < 900 MHz: 25 <1430 MHz: 29 > 1700 MHz: 45 > 1800 MHz: > 70
Group Delay Variation (ns-max	1164 - 1300: 5 1525 - 1610: 5
Noise Figure (typ)	1164 - 1300: 2.5 1525 - 1610: 2.5

Electrical:

Impedance	50 Ohms
Supply Range voltage	3 to 16 VDC Nominal, 12 VDC recommended operating max
Supply Current	50 mA max

Mechanicals:

Mechanical Size	98.0 mm x 93.0 mm x 17.6 mm
Connectors	SMA Jack
Supply Current	50 mA max

Upgrades choke ring antennas to receive the full GNSS band or subset thereof

High gain enables extended cable runs

Easy to instal