Device Overview

General Description

The EBAL-0050 is an ultra-broadband 2:1 balun (unbalanced to balanced transformer), hand-tuned for optimal amplitude and phase balance. The EBAL-0050 transforms between a 50Ω common input and a 100Ω differential output. It operates over a 10 MHz to 50 GHz bandwidth, with typical 0.25 dB amplitude and 2° phase balance, low 4 dB insertion loss as a mode converter. The EBAL-0050 can be used for performing measurements on high frequency differential devices, including cables, microchips, and communication systems. It is an excellent choice for test & measurement benches, high speed analog-to-digital converters, balanced receivers, baseband digital modulations, and signal integrity. For accurate simulations, use the provided S3P file taken from measured production units. The EBAL-0050 is in a 1.5 x 1.5 inch connectorized package and features 2.40 mm Female connectors on the common input and differential output ports.

Photo of EBAL-0050

Features

  • 2:1 Impedance Ratio
  • 10MHz to 50GHz Balun (Unbalanced to Balanced Transformer)
  • Transforms 50Ω to 100Ω Differential Output
  • Designed for Optimal Phase/Amplitude Balance

Applications

N/A

Functional Block Diagram

Block Diagram

Part Ordering Options

Part NumberDescriptionConnectorsGreen StatusProduct LifecycleExport Classification
EBAL-005010 MHz to 50 GHz Broadband BalunStandard

REACH

RoHS

ReleasedEAR99

Table Of Contents

Revision History

Revision CodeRevision DateComment
-2023-06-01Datasheet Initial Release

Rev: - | Copyright © 2023 Marki Microwave LLC.

2

Port Configuration and Functions

Port Diagram

A top-down view of the EBAL-0050 package outline drawing is shown below. Marki baluns are passive reciprocal devices allowing either single ended to differential or differential to single ended conversion.

Diagram of the port configuration for EBAL-0050

Port Functions

PortFunctionConnector TypeDescriptionDC Equivalent
Circuit
Data 0°D+ / 0° Port (Balanced) 2.4FThe 0° port is DC short to the 180° port and DC open to ground and common.Equivalent circuit for the D+ / 0° Port (Balanced)
Data 180°D- / 180° Port (Balanced) 2.4FThe 180° port is DC short to the 0° port and DC open to ground and common.Equivalent circuit for the D- / 180° Port (Balanced)
InputCommon Port / SE (Unbalanced) 2.4FThe common port is DC short to ground.Equivalent circuit for the Common Port / SE (Unbalanced)

Rev: - | Copyright © 2023 Marki Microwave LLC.

3

Specifications

Absolute Maximum Ratings

The Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. If these limits are exceeded, the device may be inoperable or have a reduced lifetime.

ParameterMaximum RatingUnit
Maximum Operating Temperature 100°C
Maximum Storage Temperature 125°C
Minimum Operating Temperature -55°C
Minimum Storage Temperature -65°C

Package Information

ParameterDetailsRating
ESD250 to < 500 VoltsHBM Class 1A
Dimensions-38.10x38.10 mm

Rev: - | Copyright © 2023 Marki Microwave LLC.

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Electrical Specifications

The electrical specifications apply at TA=+25°C in a 50Ω system. Min and Max limits are guaranteed at TA=+25°C.

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Amplitude Balance -0.01 40-0.251dB
Amplitude Balance -40 50-0.51.5dB
Common Mode Rejection -40 502029-dB
Common Mode Rejection -0.01 402533-dB
Common Port Return Loss -0.01 50-20-dB
Insertion Loss as a Mode Converter -0.01 50-48dB
Isolation -0.01 50-5-dB
Nominal Phase Shift -0.01 50-180-°
Output Return Loss -0.01 50-7-dB
Phase Balance -40 50-515dB
Phase Balance -0.01 40-210°
Impedance -- --50-Ω
Impedance Ratio -- --2:1-

Rev: - | Copyright © 2023 Marki Microwave LLC.

5

Typical Mixed Mode Performance Plots

Mixed mode scattering parameters are used to characterize differential circuits. For baluns, this means that the 0° and 180° ports become a single 100Ω differential port and the common port remains the same 50Ω common port. The two-port s-parameters of the balun are then characterized based on differential (d), common mode (c), or single-ended (s) signals. For example: Sds21 is the differential output response given a single ended input.

Insertion Loss Mode Converted (dB) graph for EBAL-0050
Common Mode Insertion Loss (dB) graph for EBAL-0050
Unbalanced Port Return Loss (dB) graph for EBAL-0050
Differential Port Return Loss (dB) graph for EBAL-0050
Return Loss as Mode Converter (dB) graph for EBAL-0050
Common Mode Return Loss (dB) graph for EBAL-0050

Rev: - | Copyright © 2023 Marki Microwave LLC.

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Typical Performance Plots

Three port scattering parameters measured as three single-ended 50Ω ports showing relationship between any two ports.

Insertion Loss (dB) graph for EBAL-0050
Return Loss (dB) graph for EBAL-0050
Isolation (dB) graph for EBAL-0050
Common Mode Rejection (dB) graph for EBAL-0050
Amplitude Balance (dB) graph for EBAL-0050
Phase Balance (°) graph for EBAL-0050

Rev: - | Copyright © 2023 Marki Microwave LLC.

7

Mechanical Data

Rev: - | Copyright © 2023 Marki Microwave LLC.

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