Device Overview

General Description

The BT2-0040 is constructed using a custom-made, resonance-free conical inductor to achieve extremely broadband performance. By minimizing the overall inductor size and using proprietary packaging techniques, the BT2-0040 is a superior option in terms of performance, reliability and ease-of-use when compared to cumbersome user-designed bias tees employing off-the-shelf conical inductors. The extremely low cutoff and resonance free operation makes the BT2-0040 suitable for biasing amplifiers, lasers, and modulators driven with high frequency data patterns.

Photo of BT2-0040

Features

  • Broadband: 200 kHz to 40 GHz
  • Low Insertion Loss
  • High Power
  • Non-Resonant
  • Compact Size

Applications

  • Test and Measurement Equipment

Functional Block Diagram

Block Diagram

Part Ordering Options

Part Number Description Connectors Green Status Product Lifecycle Export Classification
BT2-0040 High Power Bias Tee Standard

REACH

RoHS

Released EAR99

Table Of Contents

Revision History

Revision Code Revision Date Comment
B 2020-04-01 Performance vs Bias current plots
C 2021-03-01 Updated Spec Table and Low Frequency Plots

Rev: C | Copyright © 2020 - 2021 Marki Microwave Inc.

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Port Configuration and Functions

Port Functions

Port Function Connector Type Description Equivalent Circuit
for Package
Common RF+DC 2.92F This port is DC blocked to the RF port and DC connected to the DC port through an internal RF choke. Equivalent circuit for the RF+DC undefined
DC DC 2.92F This port is internally connected to an RF choke which is DC connected to the RF+DC port and DC blocked to the RF port. Equivalent circuit for the DC undefined
RF RF 2.92F This port is internally DC blocked to the RF+DC and DC ports. Equivalent circuit for the RF undefined

Rev: C | Copyright © 2020 - 2021 Marki Microwave Inc.

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Specifications

Absolute Maximum Ratings

Parameter Maximum Rating Unit
DC Current 2 A
DC Voltage 50 V
Maximum Storage Temperature 125 °C
Minimum Storage Temperature -65 °C
RF Power Handling 10 W

Package Information

Parameter Details Rating
Weight - 23.5g
Dimensions - 15.24 x 36.07 mm

Rev: C | Copyright © 2020 - 2021 Marki Microwave Inc.

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Electrical Specifications

Specifications guaranteed from -55 to +100°C, measured in a 50Ω system.

Parameter Test Conditions Minimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
Min Typ Max Unit
Capacitance - - - - 100 - nF
DC Port Isolation - 0.0002 1 - 50 - dB
DC Port Isolation - 1 40 - 30 - dB
DC Resistance - - - - 0.5 - Ω
Inductance - - - - 68 - μH
Insertion Loss - 0.0002 0.0003 - 2 - dB
Insertion Loss - 0.0003 40 - 1.5 2.5 dB
Return Loss - 0.0002 40 - 14 - dB
Risetime/Falltime 1 - - - - 10 - ps

[1] Specified as 90%/10%. Calculated from 𝜏bt2 = (𝜏out2 - 𝜏in2)

Rev: C | Copyright © 2020 - 2021 Marki Microwave Inc.

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Typical Performance Plots

RF insertion loss (dB) graph for BT2-0040
Return Loss graph for BT2-0040
Low frequency RF response graph for BT2-0040
Low frequency isolation graph for BT2-0040
DC-RF isolation graph for BT2-0040
Near DC isolation graph for BT2-0040
Group Delay graph for BT2-0040
Performance over temperature graph for BT2-0040

Rev: C | Copyright © 2020 - 2021 Marki Microwave Inc.

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Insertion Loss vs Bias Current graph for BT2-0040
Common Return Loss vs Bias Current graph for BT2-0040
RF Return Loss vs Bias Current graph for BT2-0040

Time Domain Performance Plots

Oscilloscope measurements of the BT2-0040 with a 10Gb/s PRBS pattern. Eye diagrams are taken with a 231-1 PRBS input demonstrating minimal eye distortion/closure afforded by the extremely low frequency operation of the bias tee.

Oscilloscope measurements of the BT2-0040 with a 10Gb/s PRBS pattern graph for BT2-0040

Rev: C | Copyright © 2020 - 2021 Marki Microwave Inc.

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Mechanical Data

Rev: C | Copyright © 2020 - 2021 Marki Microwave Inc.

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