CONICAL INDUCTORS: ADVANCED BROADBAND RF CHOKES
Conical inductors are specialized broadband RF chokes designed to filter radio frequency (RF) and microwave frequency interference in electronic circuits. Gowanda offers both “flying lead” (FL) and surface mount (SM) options, providing high-performance solutions for a wide range of applications.
What Are Broadband Conical Inductors?
Conical inductors are high-impedance elements used to isolate noise or DC from desired signals in high-frequency applications. Their unique conical shape offers several advantages over traditional inductors:
- Wide frequency range coverage (40 MHz to 50+ GHz)
- Predictable frequency response
- Repeatable RF performance
- Reduced stray capacitance effects
How Conical Inductors Function
Conical inductors work by impeding changes in current, such as AC noise, through energy storage in a magnetic field. As current changes over time (di/dt), the inductor creates a voltage (V = L * di/dt) that opposes further current changes. This process effectively disperses electrical energy from noise “spikes” over time, reducing their impact on the circuit.
Conical Inductor Applications
- RF amplifiers
- Filters
- Broadband Chip Manufacturing
- Communication Platforms
- Communication applications for Bias-T's (filter signals, remove noise)
- High Frequency
- Medical Equipment
- Microwave Circuitry
- RF Test- Set-ups
- Test & Measurement
- Test Gear
- Test Instrumentation
- Tranmission Amplifiers
The Conical Shape Advantage
The conical shape of these inductors offers several benefits:
- Limits stray capacitance effects
- Creates a series of narrow-band inductors within a single component
- Provides high impedance across a very wide bandwidth
- Replaces multiple narrow-band inductors with a single component
Applications: Isolating RF Signals from DC Bias
A key application for conical inductors is in broadband filtering and DC bias isolation. When placed in line with an amplifier’s DC bias, these chokes block a wide range of high frequencies from reaching the DC source. This configuration:
- Injects DC bias effectively
- Isolates AC signals from distortion by stray AC noise
- Provides critical frequency range blocking
Gowanda's Conical Inductor Offerings
Surface Mount (SM) Options
- Four physical size configurations
- C100SM series with right or left mounting options for EMI management
- Proprietary mounting system for consistent performance
Flying Lead (FL) Options
- Nine physical size configurations
- Four high-current designs rated up to 10 Amps
- Adjustable mounting angle
Learn more about Gowanda’s conical inductors by clicking on the individual series below.
Key Features and Benefits
- Frequency range: 40 MHz to 50+ GHz
- Current ratings up to 10 Amps
- Low outgassing: <1% TML & <0.10 CVCM per ASTM E595
- Ultra-low insertion loss and return loss
- Reliability to M83446D
- Up-screening capability to MIL-STD-981
- Robust Construction: The conical shape and robust construction enhance mechanical stability and durability.
- Standard and custom design options
Technical Specifications
Here are some key technical specifications for Gowanda’s broadband conical inductors:
- Inductance Range: From 0.47 µH to 10.7 µH
- DCR (Ohms): From 0.19 to 7.10
- Current Rating (mA DC): From 150 to 815
- Operating Temperature: -55°C to +125°C
- Outgassing Tested: All series have been outgassing tested per ASTM E595 and meet the TML requirement of 1.0% max.
See Product Information below.
Why Choose Gowanda Electronics?
Gowanda Electronics is a vertically integrated, U.S.-based leader in high-quality, reliable electronic components. Here are some reasons to choose Gowanda:
- Vertical Integration: Control over every step of the manufacturing process ensures high-quality components and streamlined operations.
- Custom Expertise: Ability to design and manufacture custom components to meet specific application requirements.
- Robust Customer Support: Dedicated customer support team available to assist with any inquiries or custom requirements.
Conclusion
Conical inductors are essential components for high-frequency RF and microwave applications, offering superior broadband performance in a compact package. Whether you need off-the-shelf solutions or custom designs, Gowanda’s expertise in conical inductors ensures optimal performance for your electronic circuits.
For more information on specific series or to discuss custom requirements, please contact our expert team.
Standard Product Series Information
| Series | L µH | DCR Ohms | Current Rating mA DC |
|---|---|---|---|
| C050FL | 0.28 – 0.47 | 0.45 – 0.87 | 275 – 280 |
| C070FL | 0.165 – 1.050 | 0.080 – 1.50 | 150 – 625 |
| C100FL | 0.26 – 1.54 | 0.10 – 2.70 | 110 – 573 |
| C102FL | 0.47 – 3.80 | 0.19 – 3.70 | 182 – 815 |
| C182FL | 1.47 – 10.7 | 0.33 – 7.10 | 150 – 694 |
| C225FL | 0.60 – 8.0 | 0.16 – 6.40 | 89 – 562 |
| C305FL | 0.30 – 1.0 | 0.020 – 0.125 | 1300 – 7200 |
| C550FL | 1.20 – 6.80 | 0.020 – 0.125 | 2200 – 10500 |
| C750FL | 2.50 – 16 | 0.020 – 0.265 | 2200 – 8100 |
| C1000FL | 5.0 – 22 | 0.030 – 0.215 | 2700 – 7700 |
Custom Solutions
Gowanda specializes in creating application-specific designs for unique requirements. Our extensive capabilities in design, development, production, and testing allow us to deliver tailored conical inductor solutions for your specific needs.