18Layers Communication Base Station PCB

Name: 18Layers Communication Base Station PCB
Brand: PCB Printed Circuit Board and PCBA manufacturing
Availability: InStock
Rating: 5 (1 reviews)

Product Model: 18Layers Communication Base Station PCB

Base Material: Panasonic M6

PCB Layers: 18 Layers

Copper Thickness: 0.5–1OZ

Finished Thickness: 2.0mm

Surface Treatment: Immersion Gold

Min Trace / Space: 4mil/4mil (0.1mm/0.1mm)

Minimum Aperture: 0.2mm (8mil)

Special Process: Metal edging

Application: Communication base station equipment

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Description
Data Sheet

1. FR4 Dielectric Constant

FR4 is the most common PCB dielectric, with a relative dielectric constant of 4.2-4.7 (vs air). It varies with temperature (max 20% variation at 0-70℃), causing a 10% line delay change (higher temperature = greater delay). Dielectric constant decreases with frequency; below 100MHz, use 4.5 for capacitance and delay calculation.

2. Signal Transmission Speed (FR4 PCB)

Inner layer: 180ps/inch (1inch = 1000mil = 2.54cm); Surface layer: 140-170ps/inch (varies by condition).

3. Capacitor Characteristics & Filtering

Capacitors can be equivalent to L-R-C series, with a resonance point (inductive beyond this point), determined mainly by ESL (equivalent series inductance), varying with capacitance, process and manufacturer.

Examples: 100nF chip capacitor (ESL≈0.5nH, ESR=0.1Ω) has optimal filtering at ~24MHz; 1nF chip capacitor (ESL≈0.5nH, ESR=0.01Ω) at ~200MHz.

Combining different capacitors for better filtering may cause an unwanted resonance point (24-200MHz) with higher impedance. Mitigate this by using larger ESR capacitors (reduces Q value, flattens frequency characteristics) or adding a few-ohm series resistor to small capacitors (e.g., 680pF) in parallel combinations.

Note: Example parameters are inferred (no manufacturer-specific ESL/ESR), with minimal deviation. Past resonant frequencies for 1nF/100nF ceramic capacitors were 100MHz/10MHz; chip capacitor ESL is smaller (no reliable data yet).

Model : 18Layers Communication Base Station PCB

Material : panasonic M6

Layer : 18Layers

Copper Thickness : 0.5-1OZ

Finished Thickness : 2.0mm

Surface Treatment : Immersion Gold

Trace/Space : 4mil/4mil(0.1MM/0.1MM)

Min Hole : 0.2mm(8mil)

Special process : Metal edging

Application : communication base station PCB

18Layers Communication Base Station PCB

Description

Data Sheet

1. FR4 Dielectric Constant

2. Signal Transmission Speed (FR4 PCB)

3. Capacitor Characteristics & Filtering