Features:
- High-frequency
- High Reliability
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sales@qualwave.com
Surface Mount Baluns RF Microwave Millimeter Wave mm wave
Surface Mount Baluns (Balance-Unbalance transformers) are specialized RF/microwave components designed to convert between balanced and unbalanced electrical signals in high-frequency circuits. Manufactured using advanced thin-film or multilayer ceramic technologies, these compact devices provide critical impedance transformation and common-mode rejection capabilities. As essential building blocks in wireless systems, they facilitate optimal signal integrity while complying with modern automated assembly processes. Their surface-mount design makes them ideal for high-volume production across telecommunications, IoT, and consumer electronics applications.
Key Features and Characteristics:
1. High-frequency performance and precision engineering
Broadband operation: Support wide frequency ranges (from several MHz to multi-GHz bands) with consistent performance across specified bandwidths, eliminating the need for multiple narrowband components.
Precision impedance transformation: Provide accurate impedance conversion ratios (e.g., 1:1, 1:4, 4:1) with tight tolerance (±5% typical) to match differential and single-ended system requirements.
Excellent amplitude/phase balance: Maintain superior amplitude balance (typically ±0.5 dB) and phase balance (typically ±5 degrees) for effective common-mode noise rejection.
Low insertion loss: Achieve minimal signal loss (as low as 0.5 dB depending on frequency) through optimized magnetic coupling and low-loss dielectric materials.
2. Advanced packaging and integration capabilities
Compact form factors: Available in industry-standard packages and custom sizes for space-constrained designs.
Surface-mount compatibility: Compatible with automated pick-and-place equipment and reflow soldering processes, enabling high-volume manufacturing.
Robust construction: Utilize ceramic, ferrite, or composite substrates with termination finishes (Ni/Sn, Au) suitable for harsh environmental conditions.
ESD and thermal protection: Incorporated protection features withstand ESD events (up to 2kV HBM) and operating temperatures.
3. Enhanced reliability and application-specific optimization
High isolation performance: Provide port-to-port isolation typically exceeding 20 dB to prevent unwanted signal coupling.
Power handling capability: Support power levels from milliwatts to several watts depending on package size and design.
Model-specific optimization: Available in configurations optimized for specific applications (Wi-Fi, cellular, Bluetooth, etc.) with characterized S-parameters.
Applications:
1. Wireless communication systems
Cellular infrastructure: Base station transceivers, massive MIMO systems, and small cells requiring impedance matching and common-mode rejection in RF front-ends.
Wi-Fi/Bluetooth modules: Enable differential antenna connections and improve receiver sensitivity in 2.4/5/6 GHz frequency bands.
5G NR equipment: Facilitate mmWave and sub-6 GHz signal processing in user equipment and network infrastructure.
2. Consumer electronics and IoT devices
Smartphones/Tablets: Enable compact RF section design with improved signal integrity for cellular, Wi-Fi, and GPS receivers.
Wearable electronics: Provide miniature signal conversion solutions for health monitoring and connectivity modules.
Smart home devices: Support wireless connectivity in IoT sensors, hubs, and controllers requiring reliable RF performance.
3. Test and measurement equipment
Vector network analyzers: Serve as calibration components and test fixtures for accurate differential measurements.
Wireless testers: Enable balanced port testing of amplifiers, filters, and other RF components
Signal integrity systems: Support high-speed digital testing involving differential signaling (SerDes, PCIe, etc.).
4. Automotive and industrial electronics
V2X systems: Support dedicated short-range communications (DSRC) and cellular-V2X (C-V2X) applications.
Industrial IoT: Enable robust wireless connectivity in manufacturing automation and remote monitoring systems.
Telematics units: Provide reliable RF transformation for GPS, cellular, and satellite communications modules.
5. Aerospace and defense electronics
Avionics systems: support communications, navigation, and surveillance equipment meeting stringent environmental requirements.
Military communications: Enable secure wireless links in man-portable and vehicle-mounted systems.
Radar systems: Facilitate balanced/unbalanced transformation in phased array and tracking radar applications.
Qualwave supplies surface mount baluns with different type to meet the needs of customers.
Part Number |
Frequency(GHz, Min.)  |
Frequency(GHz, Max.) |
Insertion Loss(dB, max.) |
Amplitude Balance(dB,max.) |
Phase Balance(°,max.) |
Common Mode Rejection(dB,min.) |
VSWR(typ.) |
Power(W,max.) |
Group Delay(ps,typ.) |
Lead Time(weeks) |
|---|---|---|---|---|---|---|---|---|---|---|
| QSMB-500K-6000 | 500K | 6 | 6(typ.) | ±1.2 | ±10 | 20 | 1.5 | 1 | - | 2~6 |
| QSMB-800-1000 | 0.8 | 1 | 0.48 | ±0.2 | 180±5 | - | 1.45 (max.) | 250 | - | 2~6 |
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