Device Overview

General Description

The BALH-0003SMG is a broadband surface mount balun, hand-tuned for optimal phase and amplitude balance over a 500 kHz to 3 GHz bandwidth. It serves as an excellent choice for analog to digital converters, balanced receivers, baseband digital modulations, and signal integrity enhancement.

Photo of BALH-0003SMG

Features

  • 1:1 Impedance Ratio
  • 500 kHz to 3 GHz Balun (Balanced to Unbalanced Transformer)
  • High 37 dBm 1-dB compression enables high power applications
  • Tuned for Optimal Phase/Amplitude Balance

Applications

  • Balanced Amplifiers
  • Baseband Digital Modulation
  • Signal Integrity

Functional Block Diagram

Block Diagram

Part Ordering Options

Part NumberDescriptionPackageGreen StatusProduct LifecycleExport Classification
BALH-0003SMGHigh Power Surface-Mount BalunSMG

REACH

RoHS

ReleasedEAR99
EVAL-BALH-0003Evaluation Board, High Power Surface-Mount BalunEVALConsult FactoryReleasedEAR99

Table Of Contents

Revision History

Revision CodeRevision DateComment
-2013-02-01Datasheet initial Release
A2019-03-01Evaluation board outline added
B2019-10-01Mixed Mode Scattering Parameters added
C2020-04-01Unit Spread Graphs Added
D2020-07-01Specs table update
E2020-10-01Specs table update
F2022-05-01Max DC Current, Ground Plane Finish Update
G2024-03-06Updated electrical specs table to add frequency resolution to insertion loss, balance and rejection specs.

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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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

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Specifications

Absolute Maximum Ratings

ParameterMaximum RatingUnit
DC Current 1A
Maximum Operating Temperature 100°C
Maximum Storage Temperature 125°C
Minimum Operating Temperature -55°C
Minimum Storage Temperature -65°C
RF Power Handling 33dBm

Package Information

ParameterDetailsRating
WeightPackage name: SMG0.24g
Dimensions-8.13 x 8.13 mm
Moisture Sensitivity Level-MSL 1

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 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
VSWR (Input) -0.0005 3-1.6-
VSWR (Output) -0.0005 3-1.1-
Isolation -0.0005 3-7-dB
Input P1dB -0.0005 3-37-dBm
Impedance Ratio -- --1:1-
Risetime/Falltime 1-0.0005 3-22-ps
Nominal Phase Shift -0.0005 3-180-°
Amplitude Balance -0.0005 0.002-0.5-dB
Amplitude Balance -0.002 0.01-0.23.5dB
Amplitude Balance -0.01 3-0.20.8dB
Phase Balance -0.0005 0.002-2.5-°
Phase Balance -0.002 0.01-214°
Phase Balance -0.01 3-28°
Common Mode Rejection -0.0005 0.002-30-dB
Common Mode Rejection -0.002 0.011332-dB
Common Mode Rejection -0.01 32035-dB
Insertion Loss as a Mode Converter -0.0005 0.002-2-dB
Insertion Loss as a Mode Converter -0.002 0.01-1.94dB
Insertion Loss as a Mode Converter -0.01 3-23.5dB

[1] Specified as 90%/10%. Calculated from Tau_balun2 = (Tau_out^2 – Tau_in^2)

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Time Domain Performance Plots

Oscilloscope measurements of the BALH-0003SMG with a 5 Gb/s PRBS pattern. Bit pattern is measured with a 27-1 PRBS input demonstrating extremely good pulse fidelity for both inverted and non-inverted output. Eye diagrams are taken with a 231-1 PRBS input demonstrating minimal eye distortion/closure afforded by the extremely low frequency operation of the balun (<500 kHz).

Oscilloscope measurements of the BALH-0003SMG with a 5 Gb/s PRBS pattern graph for BALH-0003SMG

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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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: Sds12 is the differential output response given a single ended input.

Insertion loss as a mode converter graph for BALH-0003SMG
Insertion loss as a mode converter across 50 units graph for BALH-0003SMG
Return loss of a common mode signal graph for BALH-0003SMG
Return loss of a differential signal graph for BALH-0003SMG

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Reflection converted between differential and common modes graph for BALH-0003SMG
Insertion loss of a common mode signal graph for BALH-0003SMG
Unbalanced port return loss graph for BALH-0003SMG
Low frequency Insertion loss as a mode converter across 10 units graph for BALH-0003SMG

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Typical Performance Scattering Parameters

Three port scattering parameters measured as three single-ended 50Ω ports showing relationship between any two ports. For example: S21 and S31, often referred to as insertion loss of a balun, is the output response on ports 2 and 3 with an input stimulus on port 1.

Common to output port insertion loss and output to output port Isolation graph for BALH-0003SMG
Return loss for common port and output ports graph for BALH-0003SMG
Amplitude balance between output ports graph for BALH-0003SMG
Amplitude balance, 50 unit spread graph for BALH-0003SMG
Phase balance between output ports graph for BALH-0003SMG
Phase balance between output ports graph for BALH-0003SMG

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Common mode rejection graph for BALH-0003SMG
Common mode rejection, 50 unit spread graph for BALH-0003SMG
Output Compression graph for BALH-0003SMG

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Mechanical Data

Outline Drawing

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

Outline Drawing

Substrate material is 8-mil thick Rogers 4003, 1 Oz Electrodeposited Cu. I/O Pads & Ground Plane Finish is Gold Flash, 5 to 10 µinches, over Electroplated Nickel, 100-200 µ-inches, over Cu.

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Evaluation Board - Performance Data

ParameterTest ConditionsFrequency Range (GHz)MinTypMaxUnit
Impedance Ratio---1-

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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Evaluation Board - Outline Drawing

Outline Drawing

Rev: G | Copyright © 2013, 2019 - 2020, 2022, 2024 Marki Microwave LLC.

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