Rev: E | Copyright © 2020 - 2021, 2024 - 2025 Marki Microwave LLC.

General Description

The BAL-0020SLG is a broadband surface mount balun, hand-tuned for optimal phase and amplitude balance over a 10 MHz to 20 GHz bandwidth. It serves as an excellent choice for analog to digital converters, balanced receivers, baseband digital modulations, and signal integrity enhancement.

Features

  • 2:1 Impedance Ratio
  • 10 MHz to 20 GHz Balun (Balanced to Unbalanced Transformer)
  • Transforms 50 Ω Input to 100 Ω Differential (50 Ohm Single) Output
  • Tuned for Optimal Phase/Amplitude Balance

Functional Block Diagram

Block Diagram
Photo of BAL-0020SLG

Electrical Performance Summary

ParameterTypUnit
Frequency Range0.01 to 20GHz
Insertion Loss as a Mode Converter 4.5dB
Phase Balance 5°
Amplitude Balance 0.4dB
Impedance Ratio 2:1-
Common Mode Rejection 35dB

Summary only – refer to the Electrical Specifications, Absolute Maximum Ratings, and Recommended Operating Range tables for complete details.

Part Ordering Options

Part NumberDescriptionPackageGreen StatusProduct LifecycleExport Classification
BAL-0020SLGSurface-Mount Broadband BalunSLG

REACH

RoHS

ReleasedEAR99
EVAL-BAL-0020Evaluation Board, Surface-Mount Broadband BalunEVAL

REACH

RoHS

ReleasedEAR99

Table Of Contents

Mixed Mode Scattering Parameters

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.

Sdd22: differential return loss of the differential port driven with a differential signal
Sdc22: differential return loss of the differential port driven with a common signal
Sds21: insertion loss from a single ended input to a differential output
Scc22: common mode return loss of the differential port driven with a common signal
Scd22: common mode return loss of the differential port driven with a differential signal
Scs21: insertion loss from a single ended input to a common output
Sss11: single ended return loss
Ssd12: insertion loss from a differential signal to single ended output
Ssc12: insertion loss from a common signal to single ended output

Insertion loss as a mode converter graph for BAL-0020SLG
Insertion Loss Mode Converter graph for BAL-0020SLG
Unbalanced port return loss graph for BAL-0020SLG
Differential port return loss graph for BAL-0020SLG
Insertion loss of a common mode signal graph for BAL-0020SLG
Reflection converted between differential and common modes graph for BAL-0020SLG
Return loss of a common mode signal graph for BAL-0020SLG

Typical Performance Scattering Parameter

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

Common To Output Port Insertion Loss graph for BAL-0020SLG
Return loss for common port and output ports graph for BAL-0020SLG
Common mode rejection graph for BAL-0020SLG
Isolation Between Output Ports (dB) graph for BAL-0020SLG
Amplitude balance between output ports graph for BAL-0020SLG
Phase Balance Between Output Ports graph for BAL-0020SLG
Phase Balance Between Output Ports graph for BAL-0020SLG
Low Frequency Insertion Loss (dB) graph for BAL-0020SLG

Typical Performance over Temperature

Insertion Loss (dB) graph for BAL-0020SLG
Common Mode Rejection (dB) graph for BAL-0020SLG
Common Port Return Loss (dB) graph for BAL-0020SLG
Output 1 Return Loss (dB) graph for BAL-0020SLG
Output 2 Return Loss (dB) graph for BAL-0020SLG
Isolation (dB) graph for BAL-0020SLG
Amplitude Balance (dB) graph for BAL-0020SLG
Phase Balance (degree) graph for BAL-0020SLG

Specifications

Electrical Specifications

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

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Frequency Range-0.01 20---GHz
Amplitude Balance -0.01 20-0.41.2dB
Common Mode Rejection -0.01 202235-dB
Insertion Loss as a Mode Converter -16 20-58dB
Insertion Loss as a Mode Converter -0.01 16-4.57dB
Isolation -0.01 20-12-dB
Nominal Phase Shift -0.01 20-180-°
Phase Balance -0.01 20-510°
VSWR (Common) -0.01 20-1.5--
VSWR (Output) -0.01 20-1.6--
Impedance Ratio -- --2:1--

Absolute Maximum Ratings

ParameterMaximum RatingUnit
Maximum Operating Temperature 100°C
Maximum Storage Temperature 125°C
Minimum Operating Temperature -55°C
Minimum Storage Temperature -65°C
RF Power Handling 30dBm

Package Information

ParameterDetailsRating
Dimensions-5.08 x 12.70 mm
Moisture Sensitivity Level-MSL 1

Port Configuration and Functions

Port Functions

PortFunctionDescriptionDC Equivalent
Circuit
Common Port / In (Unbalanced)RF Input The common port is DC short to ground.Equivalent circuit for the RF Input
Out 1 / 0° Port (Balanced)0° Port The 0° port is DC short to ground.Equivalent circuit for the 0° Port
Out 2 / 180° Port (Balanced)180° Port The 180° port is DC short to ground.Equivalent circuit for the 180° Port

Mechanical Data

Outline Drawing

Download : Outline 2D Drawing Outline 3D Drawing Outline 3D STP

Outline Drawing

Evaluation Board

Evaluation Board - Electrical Specification

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Frequency Range-- ----GHz
Impedance Ratio -- --2:1--

Evaluation Board - Outline Drawing

Outline Drawing

Revision History

Revision CodeRevision DateComment
-2020-09-01Initial Release
A2021-05-01Temp data & insertion loss spec change
B2021-11-01Side vent Slot size reduced to 0.146 inch / 3.71 mm was 0.360 inches / 9.14 mm long. See Surface Mount Outline Drawing
C2024-04-08Updated Electrical Specifications minimum frequencies
D2025-02-14Updated Spread IL Mode Converter and Phase Balance Plot
E2025-07-29Power handling

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