Coaxial Bias Tee

BT4120 - SMA Bias Tee, 10-4000 MHz, 1.5A

High Isolation, 10 MHz - 4 GHz, N Type 50 Ohm

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High Isolation Bias Tee, SMA Female

high-isolation bias tee w/ SMA-jack connectors

  • Inject DC into RF Transmission Line
  • Low Insertion Loss (0.15 dB avg)
  • High RF to DC Isolation (65 dB avg)
  • Excellent VSWR (1.10 : 1 avg)
  • 100 VDC & 1.5 A max at DC port
  • Tri Alloy SMA Female (Jack) 50 Ohm
Coaxial Bias Tee SMA Outline Drawing
Mechanical Specifications
Connectors ……………  SMA Jack, 50 Ohm Coaxial
Body ……………………  Brass, Tri-Alloy Plate
Connector Pin …  Beryllium Copper, Gold Plate
Insulator ……………  PTFE, Virgin Electrical Grade
Housing …………………  Aluminum, Clear Chem Film
Operating Temp …  -65°C to +85°C
Weight ……………………  133 Grams

BT4120 - Coaxial Bias Tee Specifications

Frequency Range Insertion Loss VSWR DC Voltage DC Current RF-DC Isolation RF Input Power
10 - 4000 MHz 0.35 dB max 1.20 : 1 max 100 V max 1.5 A max 40 dB min 100 W max

BT4120 - SMA Bias-T Test Data

Bias Tee, SMA Jack - Insertion Loss
Insertion Loss Test Sweep for Model BT4120 from INSTOCK Wireless.
Bias Tee, SMA Jack - Isolation
Isolation Test Sweep for Model BT4120 from INSTOCK Wireless.
Bias Tee, SMA Jack - VSWR
Input VSWR Test Sweep for Model BT4120 from INSTOCK Wireless. Output VSWR Test Sweep for Model BT4120 from INSTOCK Wireless.

Input Return Loss

Output Return Loss

BT4120 - Features & Benefits

Overview

BT4120 is a bias tee (also called a bias T) 3-port device with SMA female coaxial connectors that is ideal for injecting DC current into your RF transmission line, typically used for remotely powering a low-noise amplifier or active antenna. Covering all applications within the 10-4000 MHz range, this Bias T can pass up to 1.5 Amps of DC current with excellent electrical performance.

Electrical

The heart of the unit is a precision designed and etched microstrip circuit on a low-loss, high-frequency, dielectric substrate. Electrical performance is highlighted by 0.35 dB max insertion loss, 40 dB min RF-DC isolation, and 1.20:1 max VSWR. Narrow band RF performance over your frequency range may be even better. 100W max RF input power, 100V max DC voltage, and 1.5 Amp max DC current ensures optimal performance for all of your DC-injection requirements.

Mechanical

The BT4120's T-Style housing allows convenient coaxial cable access to all connector ports. Mechanical features include precision CNC, brass, 50 ohm SMA female coaxial connectors with tri allow plating to ensure tarnish resistance and low PIM operation. Connector pins are gold plated beryllium copper for reliability and low contact resistance. Virgin electrical grade PTFE support insulators captivate the contact pins enabling trouble free coaxial connector mating. Long term operation and superior shielding is assured by the rugged CNC machined aluminum housing with clear chemical film finish. Secure mounting is provided by two 0.125" dia (3.18 mm) through holes. RoHS construction includes no-lead solder and a finish free of hexavalent chromium.

Physical

Housing dimensions are 1.98" wide by 1.98" deep by 0.88" high (50.3 x 50.3 x 22.2 mm). The SMA female (jack) connectors extend 0.44" (11.1 mm) from the housing. Operating temperature range is from -65°C to +85°C. Weight is 133 grams. See SMA Bias T outline drawing for more information.

Applications

The BT4120 SMA female (jack), 1.5 Amp, high isolation Bias Tee is ideal for a wide range of wireless radio frequency microwave applications where you must remotely insert DC current into an RF/microwave transmission line, often to power a low noise amplifier or active antenna. For more information on applications of an INSTOCK Wireless coaxial Bias Tee, please contact an INSTOCK Applications Engineer at 1-973-335-6550.

Options / Additional Models

BT4020: Bias Tee with N type female 50 ohm coaxial connectors, spanning 10-4000 MHz. Permits injection of up to 1.5 Amp of DC current into your RF line. RF in, DC in, RF+DC out.

BT4520: Bias Tee with BNC female 50 ohm coaxial connectors, spanning 10-4000 MHz. Permits injection of up to 1.5 Amp of DC current into your RF line. RF in, DC in, RF+DC out.

BT4920: Bias Tee with TNC female 50 ohm coaxial connectors, spanning 10-4000 MHz. Permits injection of up to 1.5 Amp of DC current into your RF line. RF in, DC in, RF+DC out.

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