WE-BAL Multilayer Chip Balun
SizeDimen­sionsL
(mm)
W
(mm)
H
(mm)
Mount
0603
1.6 0.8 0.8 SMT
0805
2 1.25 1 SMT

Characteristics

  • Low loss SMT Balun with balanced impedance of 50 to 200 Ω
  • Operating temperature: -55 °C to +125 °C
  • Power Capacity: 2 W max.

Applications

  • RF applications
  • Wireless communication systems like Home RF, DECT, WLAN, Bluetooth, ZigBee …

Products

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0603
0805
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Order Code
Data­sheet
Simu­lation
Downloads
Status
IL(dB)
Frequency Range(MHz)
Phase Imbalance(°)
VSWR
Unbalanced Impedance(Ω)
Balanced Impedance(Ω)
Amplitude imbalance(dB)
SamplesAvailability & Sample
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7484112500
SPEC0.55 dB, 2300 - 2700, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss0.55 dB
Frequency Range 2300 - 2700
Phase Imbalance180 °
VSWR1.7 
Unbalanced Impedance50 Ω
Balanced Impedance100 Ω
Amplitude imbalance2 dB
Check availability
7484212450
SPEC1 dB, 2400 - 2500, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss1 dB
Frequency Range 2400 - 2500
Phase Imbalance180 °
VSWR
Unbalanced Impedance50 Ω
Balanced Impedance100 Ω
Amplitude imbalance2 dB
Check availability
7484212300
SPEC1 dB, 1500 - 3100, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss1 dB
Frequency Range 1500 - 3100
Phase Imbalance180 °
VSWR
Unbalanced Impedance50 Ω
Balanced Impedance100 Ω
Amplitude imbalance2 dB
Check availability
7484152450
SPEC1.2 dB, 2400 - 2500, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss1.2 dB
Frequency Range 2400 - 2500
Phase Imbalance180 °
VSWR
Unbalanced Impedance50 Ω
Balanced Impedance50 Ω
Amplitude imbalance2 dB
Check availability
7484112450
SPEC1.2 dB, 2400 - 2500, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss1.2 dB
Frequency Range 2400 - 2500
Phase Imbalance180 °
VSWR
Unbalanced Impedance50 Ω
Balanced Impedance100 Ω
Amplitude imbalance2 dB
Check availability
7484215510
SPEC1.2 dB, 4900 - 5900, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss1.2 dB
Frequency Range 4900 - 5900
Phase Imbalance180 °
VSWR1.7 
Unbalanced Impedance50 Ω
Balanced Impedance100 Ω
Amplitude imbalance2 dB
Check availability
7484252450
SPEC1.2 dB, 2400 - 2500, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss1.2 dB
Frequency Range 2400 - 2500
Phase Imbalance180 °
VSWR1.7 
Unbalanced Impedance50 Ω
Balanced Impedance50 Ω
Amplitude imbalance2 dB
Check availability
7484111680
SPEC1.7 dB, 673 - 2700, 180 °
Simu­lation
Availability
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Insertion Loss1.7 dB
Frequency Range 673 - 2700
Phase Imbalance180 °
VSWR2.45 
Unbalanced Impedance50 Ω
Balanced Impedance100 Ω
Amplitude imbalance1.5 dB
Check availability

LTCC Technology

LTCC basics

LTCC Technology

LTCC basics

Low Temperature Co-fired Ceramic or LTCC is a multilayer ceramic substrate in which the ceramic layers have been sintered together, which is called “co-fired”. The layers are mainly composed of ceramic and glass powder and are mixed up with solvent and binding agents, casted and dried out for further processing.

Since the temperature used for co-firing is relatively low (around 900 °C), low-resistivity materials like silver and gold are used for metallization. It is a highly repetitive process and is used to produce large quantities of RF components in a reliable manner.

Thanks to LTCC technology, transmission line baluns may leverage advanced materials and manufacturing techniques to achieve improved performance, reliability, and efficiency.

SMT balun with low losses and different matching ratios

LTCC internal structure

Multilayer Chip Balun

BALanced-UNbalanced

Multilayer Chip Balun

BALanced-UNbalanced

A balun (balance - unbalance) is a device that converts between balanced (symmetric) and unbalanced (unsymmetric) signals and may or may not transform impedances, depending on the application. It is a three-port power splitter, designed for a certain specific frequency, bandwidth and impedance. With modern trends in technology, RF transceivers are increasingly utilizing more and more differential topologies due to the inherent benefit of noise reduction and a balun is always needed to adapt the signal between single ended(unbalanced) and a differential(balanced) transmission line. For example, between IC and antenna.

Diagram shows the effect of the WE-BAL

Balun parameters

Insertion Loss

Insertion Loss describes the amount of loss in the system and is expressed in dB (decibels). Here it means the amount of loss in signal, due to travelling into and out of the balun . It can be calculated with the help of S-parameters, given the measurement ports are using the same reference impedance. Due to high quality and standards, typical insertion loss values are less than 1.5 dB.

Amplitude- and phase balance 

Amplitude- and phase balance describe how accurately the signal is matched between the differential lines. Phase balance gives the difference in phase between the balanced lines, whereas amplitude balance is the measure of how well matched the output power is, between the balanced ports. Typical tolerance values for phase balance are ± 10° and for amplitude balance is ±1 dB.

Unbalanced- and balanced Impedance 

Is the impedance of single ended and differential lines, depending upon the requirements. Baluns are bidirectional passive devices, used to convert between balanced and unbalanced signals and impedances. One of the most important functions of a balun is to transform the impedance between single-ended and differential lines.

Two diagrams showing the frequency of the WE-BAL

Typical Application

Types and applications

Würth Elektronik RF-balun portfolio includes multilayer SMD baluns with balanced impedances of 50, 100 and 200 Ω in the sizes 0603 and 0805 with the working frequency ranges from 673 MHz to 5900MHz. Most common applications for these baluns include WiFi, Bluetooth, wireless communication systems and IoT enabled devices. Due to LTCC based technology, high performance is achieved with minimal insertion loss in the frequency band of interest.

The graphic shows the applications of the WE-BAL