160nH Broadband RF Choke Microwave High Frequency Choke Coil 200MHz - 20GHz

HALT20015 160nH Broadband RF Microwave Choke 200MHz-20GHz

High-Frequency Technical Summary

   The HALT20015 is an elite, high-performance Broadband Conical Inductor designed to operate as an RF choke or bias-tee decoupling element across an ultra-wide frequency spectrum of 200 MHz to 20.0 GHz (with usable reference performance extending up to 40.0 GHz). Featuring a nominal inductance of 160 nH ± 20% and supporting continuous currents up to 800 mA, this conical coil is optimized for high-speed fiber-optic transceivers (TOSA/ROSA), broadband test equipment, GaAs/GaN MMIC bias networks, and Strategic radar transceivers.

   Unlike standard solenoidal inductors, which suffer from sharp parallel resonant peaks that disrupt wideband signals, the HALT20015 uses a tapered conical geometry. The unique cone shape continuously distributes parasitic capacitance along the length of the coil, smoothing out self-resonant frequencies (SRFs) and providing a flat, high-impedance insertion curve over the entire microwave band.

Overall Dimensions

Key Performance Advantages
   Ultra-Broadband Performance (200 MHz - 20 GHz): Excellent RF choking and bias decoupling, bridging the gap between low-frequency lumped inductors and high-frequency thin-film elements.
   Dual-Wire Gauge Customization: Available in two optimized wire configurations:
     •HALT20015-15 (Standard): Wound with 0.15 mm wire for high-current applications (up to 800 mA) and ultra-low DC resistance (DCR).
     •HALT20015-08 (High-Impedance): Wound with 0.08 mm wire for low-parasitic, high-impedance performance (up to 40 GHz) in low-current paths (up to 200 mA).
   Solder-and-Weld Compatibility : Outfitted with high-solderability flying leads designed for reliable soldering, lead bonding, or wedge bonding to microwave microstrip lines.
   Strategic-Grade Thermal Ruggedness: Rated for continuous operation in extreme environments from -55°C to +125°C, wound using specialized high-temperature polyimide-insulated copper wire.
   Free-Standing Air-Core Stability: Eliminates core-loss saturation issues and ensures high-Q performance, maintaining absolute electrical integrity under varying RF power levels.

Comprehensive Parameter Datasheet

Multi-Frequency Operational Performance Breakdown

   The HALT20015 has been extensively tested using customized microwave microstrip fixtures. Its broadbandimpedance and attenuation performance are categorized into three major frequency segments:

Comparative Technical Matrix (HALT20015 vs. Alternative Inductors)

   This table outlines why the conical tapered winding is preferred for high-frequency microstrip circuits:

Microwave Micro-Assembly & Installation Guide
   To preserve high-frequency signal integrity and prevent physical damage to the delicate copper wire, assembly operators must strictly follow this SOP:

Physical Alignment & Orientation
   Cone Tip Orientation: The small end of the conical inductor must point downward and be positioned perpendicular (≈90° ) to the RF transmission microstrip line.
   Lead-Wire Length: Keep the flying lead from the small end (tip) as short as possible (ideally <0.5 mm to the microstrip). Even minor lead lengths act as parasitic inductors, introducing unwanted resonances.
   Physical Fixation: Conical inductors must be secured to the substrate using a small dot of non-conductive, low-outgassing epoxy (e.g., Epotek H70E or H65) on the side of the winding. This prevents resonant microphonic vibrations and mechanical failure under high-vibration environments.
Micro-Soldering and Welding SOP
   Soldering Temperature: Controlled micro-soldering tip temperature should be 280℃−320℃ for a duration of ≤3 seconds to prevent enamel degradation or coil sagging.
   Lead-Free Compliance: Fully compatible with lead-free SAC305 solder and high-melting-point eutectic gold-tin (AuSn) or lead-tin (PbSn) solder alloys.

Test Data(10MHz-500MHz)