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High-Frequency Series DC Block

Blocks dangerous DC bias voltages while providing transparent microwave transmission.

High-Frequency Series DC Block — Photorealistic 3D PCB Hardware Render
NIKOLARF
Insertion Loss
< 0.12 dB Insertion loss up to 40 GHz
Isolation / Return Loss
> 25 dB Return Loss (VSWR < 1.12:1)
Bandwidth
100 kHz up to 40+ GHz
Power Rating
100V DC breakdown rating, 5W RF power

Device Topology & Electromagnetic Behavior

An in-line high-frequency capacitor structure embedded directly into a 50 Ω microstrip or grounded coplanar waveguide (GCPW) transmission line. Blocks direct current (DC) potentials from propagating between cascaded amplifier stages or test equipment, while presenting transparent (<0.1 dB) insertion loss to high-frequency RF signals.

ANALYTICAL FORMULATIONS & S-MATRIX MAPPING
C ≥ (1) / (2π f_low) · 0.1 · Z₀ (Low-frequency cutoff criterion)
• Determines minimum capacitance required to maintain low-frequency passband.
f_SRF > f_max (Series Resonant Frequency must exceed upper operational band)
• Prevents capacitor from entering inductive mode at high microwave frequencies.
Recommended Substrate Stackup

Rogers RT/duroid® 5880 (εr = 2.20) for minimal pad parasitic capacitance.

Nikola RF Fabrication Directives
  • Tuned microstrip ground cutouts directly underneath capacitor solder pads to compensate for pad parasitic capacitance.
  • Ultra-broadband multi-layer ceramic capacitor with single-layer porcelain dielectric.
Full-Lifecycle Engineering Services

Design, 3D EM Simulation & Handoff for High-Frequency Series DC Block

We provide turnkey synthesis, multi-frequency full-wave simulation, and fabrication-ready packaging for the High-Frequency Series DC Block.

1. 3D Full-Wave FEM Modeling

Complete Ansys HFSS 3D CAD modeling with true edge-launch SMA or SMP connectors, via fence stitching, and adaptive mesh refinement down to ΔS < 0.007.

2. Sensitivity & Tolerance Sweeps

Monte Carlo statistical analysis over copper etching tolerances (±15 µm) and substrate permittivity variations to guarantee first-pass high-yield manufacturing.

3. Manufacturing Handoff

Delivery of verified simulation models, parameterized layout geometries, and photolithography-compliant Gerber RS-274X fabrication packages.

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Initiate Design & 3D EM Simulation Scope for High-Frequency Series DC Block

Submit your operational frequency, bandwidth, power handling, and target substrate stackup. Our electromagnetic engineers will deliver a verified feasibility audit within 48 hours.

06 • Secure Intake & Bilateral NDA

Initiate Project Scope & NDA

We treat client intellectual property with military-grade rigor. Prior to receiving proprietary disclosure files, patent drafts, or trade secret geometries, we execute standard bilateral NDAs.

Bilateral NDA Standard

Mutual non-disclosure executed before file transmission.

Isolated On-Prem Compute

Simulations run on dedicated air-gapped workstations.

Clean Room Protocol

Full audit trail for IP litigation and patent defense.

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Computational Electromagnetics • Microwave Co-Design • Strict Engineering Confidentiality