
SMD Balun / Wideband Transformers
High-Frequency SMD Wideband RF Balun Transformers for Impedance Matching & RF Front-End
Coilmaster’s SMD Wideband RF Balun Transformers are engineered to convert unbalanced signals to balanced signals (un-bal) with superior Phase and Amplitude Balance. Utilizing Precision Paired-Wire Winding, these baluns ensure accurate Impedance Transformation (ratios like 1:1, 1:4, 1:16) across extensive frequency ranges, reaching well into the GHz domain. They are vital for RF Front-End circuits, broadband signal paths, and high-frequency transceivers where Signal Integrity, low Insertion Loss (S21), and impedance consistency are critical.
Integrating Wideband Impedance Matching and High Common-Mode Noise Suppression into a miniature SMD footprint, Coilmaster’s transformers support both 50ohm and 75ohm systems. Our advanced manufacturing ensures high Common-Mode Rejection Ratio (CMRR) and reliable broadband performance, making these components suitable for 5G Infrastructure, IoT modules, and DOCSIS 3.1/4.0 cable equipment where stable high-frequency symmetry is required.
GHz-Range Balun Technology for Phase Symmetry & Low S21 Loss
The SRIDB series wideband SMD balun transformers utilize advanced paired-wire winding to achieve stable impedance matching and excellent Return Loss (S11) across wide bandwidths. These transformers are optimized for Double-Balanced Mixers, high-speed ADC/DAC interfaces, and broadband RF signal paths where phase balance and noise suppression directly impact Bit Error Rate (BER) and system SNR. Custom impedance ratios and package designs are available for specific RF architectures.
High CMRR & Broadband Signal Integrity Advantages
Characteristic
Stable wideband performance up to GHz frequencies
High Common Mode Rejection Ratio (CMRR)
Excellent Return Loss (S11
Low Insertion Loss (S21) & excellent phase balance
Precise impedance transformation
High reliability in RF applications
Features
- Surface-mount design & low profile
- Wideband SMD baluns to GHz 50Ω/75Ω matching transformers
- High stability paired-wire coils
- Excellent return loss & frequency response
Applications
- Double balanced mixers, RF broadband transformers
- Directional couplers, Impedance Matching Networks
- Set-top boxes, cable modems, wireless modules
- Antenna input matching for tuner circuits
- RF telecommunication systems & IoT boards
| Image | name | Size(mm) | Inductance(uH) | Isat(A) | Irms(A) | DCR(mΩ) | Action |
|---|---|---|---|---|---|---|---|
| 500ohm Balun transformers | 5.3x3.5x2.3 | 0.5 | 160 | |||
| 8 MHz~0.8 GHz Balun transformers | 6.2x6.5x4.5 | |||||
| 400 MHz~1.3 GHz balun filter | 6.2x6.5x4.5 | |||||
| 6 MHz~0.6 GHz wire balun | 6.2x6.5x4.5 | |||||
| 50 MHz~500 MHz SMD Balun transformers | 6.2x6.5x4.5 | |||||
| 50 MHz~0.4GHz SMD balun filter | 6.2x6.5x4.5 | |||||
| 10 MHz~1GHz SMD wire balun | 6.2x6.5x4.5 | |||||
| 3.4 MHz~ 470 MHz Balun transformers | 6.2x6.5x4.5 | |||||
| 9 MHz~ 350 MHz broad band transformers | 6.2x6.5x4.5 | |||||
| Bbroad band transformers | 6.2x6.5x4.5 | |||||
| 2.2 MHz~ 400 MHz Balun RF filters | 6.2x6.5x4.5 | |||||
| 1.5~300 MHz SMD Balun RF filters | 6.2x6.5x4.5 |
SMD Balun / Wideband Transformers | High Current Power Inductor Manufacturer | Coilmaster Electronics
Located in Taiwan since 1995, Coilmaster Electronics Co., Ltd. has been a manufacturer of magnetic components. Its main magnetic components include, SMD Balun / Wideband Transformers, common mode chokes, SMD molding power chokes, chock coil inductors, SMD shielded and semi-shielded power inductors, low profile and high current power inductors, high voltage power inductors, ethernet and LAN power transformers, flat wire inductors, RJ45 jacks with integrated magnetics and high frequency transformers, and ceramic or air coil multilayer chip inductors.
Coilmaster offers AEC-Q200 certified, high-efficiency power inductors, chokes, and transformers. Specializing in low-loss, high-current components for Automotive, 5G, and Industrial applications. Contact our experts for instant support. With more than 20 years of experience in magnetic territory, Coilmaster Electronics is specialized in the production of SMD power inductors, common mode choke, high frequency transformers.
Coilmaster Electronics has been providing customers with high current power inductors since 1995, with both advanced technology and 29 years of experience, Coilmaster Electronics ensures that each customer's requirements are met.

