Kelvin Bias Tees

HL8448 Broadband Kelvin Bias Tee (160 kHz to 90 GHz, 175 mA)

The HL8448 is an ultra-broadband Kelvin bias tee with a sense port, offering <1.75 dB insertion loss from 160 kHz to 90 GHz for applications requiring precise DC and RF biasing. Available as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it eliminates DC bias errors in high-speed and optical communication systems including 112 Gbps PAM4.

HL8447 Broadband Kelvin Bias Tee (50 kHz to 67 GHz, 175 mA)

The HL8447 is an ultra-broadband Kelvin bias tee with a sense port, providing <1.75 dB insertion loss 35 kHz to 67 GHz for applications requiring precise DC and RF biasing. Available as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it eliminates DC bias errors in high-speed and optical communication systems including 112 Gbps PAM4.

HL8445 Broadband Kelvin Bias Tee (50 kHz to 50 GHz, 175 mA)

The HL8445 is an ultra-broadband Kelvin bias tee with a sense port, offering <1.75 dB insertion loss from 35 kHz to 40 GHz for applications requiring precise DC and RF biasing. Available as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it eliminates DC bias errors in high-speed and optical communications systems including 112 Gbps PAM4.

HL8444 Broadband Kelvin Bias Tee (50 kHz to 40 GHz, 175 mA)

The HL8444 is an ultra-broadband Kelvin bias tee with a sense port, offering <1.75 dB insertion loss from 35 kHz to 40 GHz for applications requiring precise DC and RF biasing. Available as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it eliminates DC bias errors in high-speed and optical communication systems including 112 Gbps PAM4.

Standard Bias Tees

HL9444 Broadband Bias Tee (35 kHz to 40 GHz, 175 mA)

The HL9444 is an ultra-broadband bias tee with <1.55 dB insertion loss from 35 kHz to 40 GHz, now available with an SMA jack connector on the DC port. Offered as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it enables low-perturbation DC biasing for amplifiers, lasers, optical modulators, and 112 Gbps PAM4.

HL9445 Broadband Bias Tee (35 kHz to 40 GHz, 175 mA)

The HL9445 is an ultra-broadband bias tee with <1.55 dB insertion loss from 35 kHz to 50 GHz, now available with an SMA jack connector on the DC port. Offered as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it enables low-perturbation DC biasing for amplifiers, lasers, optical modulators, and 112 Gbps PAM4 systems.

HL9447 Broadband Bias Tee (35 kHz to 67 GHz, 175 mA)

The HL9447 is an ultra-broadband bias tee with <1.55 dB insertion loss from 35 kHz to 67 GHz, now available with an SMA jack connector on the DC port. Offered as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it enables low-perturbation DC biasing for amplifiers, lasers, optical modulators, and 112 Gbps PAM4 systems.

HL9448 Broadband Bias Tee (160 kHz to 95 GHz, 175 mA)

The HL9448 is an ultra-broadband bias tee with <2 dB insertion loss from 160 kHz to 95 GHz, enabling DC bias insertion with minimal impedance disturbance on 50 Ω lines. Available as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it is ideal for amplifiers, lasers, optical modulators, and 112 Gbps PAM4 systems.

HL9449 Broadband Bias Tee (160 kHz to 110 GHz, 175 mA)

The HL9449 is an ultra-broadband bias tee with <2.5 dB insertion loss from 160 kHz to 110 GHz, enabling DC bias insertion with minimal impedance disturbance on 50 Ω lines. Available as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it is ideal for amplifiers, lasers, optical modulators, and 224 Gbps PAM4 systems.

HL9544 Bias Tee (50 kHz to 50 GHz, 400 mA)

The HL9544 is an ultra-broadband bias tee with <1.5 dB insertion loss from 50 kHz to 40 GHz, now available with an SMA jack connector on the DC port. Offered as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it enables low-perturbation DC biasing for amplifiers, lasers, optical modulators, and 112 Gbps PAM4 systems.

HL9545 Bias Tee (50 kHz to 50 GHz, 400 mA)

The HL9545 is an ultra-broadband bias tee with <1.5 dB insertion loss from 50 kHz to 50 GHz, now available with an SMA jack connector on the DC port. Offered as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it enables low-perturbation DC biasing for amplifiers, lasers, optical modulators, and 112 Gbps PAM4 systems.

HL9547 Bias Tee (50 kHz to 67 GHz, 400 mA)

The HL9547 is an ultra-broadband bias tee with up to 1.8 dB insertion loss from 50 kHz to 67 GHz, now available with an SMA jack on the DC port. It blocks existing DC signals while allowing DC bias injection into a 50 Ω transmission line with minimal impedance disturbance. Ideal for biasing amplifiers, lasers, and optical modulators in high-speed data and optical communication systems. 

HL9647 Bias Tee (125 kHz to 67 GHz, 1000 mA)

The HL9647 is an ultra-broadband bias tee with <2.3 dB insertion loss from 125 kHz to 67 GHz, now available with an SMA jack connector on the DC port. Offered as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it enables low-perturbation DC biasing for amplifiers, lasers, optical modulators, and 112 Gbps PAM4 systems.

HL9645 Bias Tee (125 kHz to 50 GHz, 1000 mA)

The HL9645 is an ultra-broadband bias tee with up to 2.3 dB insertion loss from 125 kHz to 50 GHz, now available with an SMA jack on the DC port. It blocks existing DC signals while allowing DC bias injection into a 50 Ω transmission line with minimal impedance disturbance. Ideal for biasing amplifiers, lasers, and optical modulators in high-speed data and optical communication systems.

HL9644 Bias Tee (125 kHz to 40 GHz, 1000 mA)

The HL9644 is an ultra-broadband bias tee with <2.3 dB insertion loss from 125 kHz to 40 GHz, now available with an SMA jack connector on the DC port. Offered as matched pairs or individual units with 11 V or 30 V breakdown options and multiple connector configurations, it enables low-perturbation DC biasing for amplifiers, lasers, optical modulators, and 112 Gbps PAM4 systems.

HL8342 Broadband Bias Tee (5 kHz to 28 GHz, 500 mA)

The HL8342 is an ultra-broadband bias tee with typical insertion loss of 0.5 dB from 5 kHz to 28 GHz and support for up to 400 mA of bias current. Available as matched pairs or individual units with multiple connector options, it enables DC bias insertion with minimal impedance disturbance for amplifiers, lasers, optical modulators, and high-speed data systems.

HL8442 Broadband Bias Tee (7.5 kHz up to 23 GHz, 2000 mA)

The HL8442 is an ultra-broadband bias tee with typical insertion loss of 0.75 dB from 7.5 kHz to 23 GHz and support for up to 2000 mA of bias current. Available as matched pairs or individual units with multiple connector options, it enables DC bias insertion with minimal impedance disturbance for amplifiers, lasers, optical modulators, and high-speed data systems.

HL7041 & HL7042 SMD Broadband Bias Tee (35 MHz to 30 GHz)

The HL7041 and HL7042 are RoHS-compliant bias tees in a 4 x 4 mm QFN package, offering outstanding passband flatness from 35 MHz to 30+ GHz while enabling DC bias insertion with minimal impedance disturbance on 50 Ω lines. Available in right-handed (HL7041) or left-handed (HL7042) configurations, they support high-speed applications including 64 Gbps PAM4, optical, and high-speed data systems.