---
title: "Filter (Bandpass/SAW)"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:FILTER_BANDPASSSAW"
  data_integrity_hash: "7f0a8ab3f89e7ea6068ac02c6060442a"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:FILTER_BANDPASSSAW"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/filter-bandpasssaw.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/filter-bandpasssaw"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1.8-2.5 GHz with 3 dB bandwidth of 20 MHz"
    unit: "MHz"
engineering_limits:
  max_safe_operating_point:
    value: 30
    unit: "dBm"
    consequence: "Acoustic wave energy density surpassing the substrate's elastic limit (Young's modulus: 160 GPa for lithium niobate) leads to crystal lattice fracture"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Electrostatic discharge (ESD) exceeding 500 V HBM"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrated ESD protection diodes with clamping voltage of 5.5 V"
  - node_2:
      trigger: "Thermal cycling between -40°C and +85°C at 10°C/min gradient"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Gold-tin eutectic solder (Au80Sn20) with matched CTE of 16 μm/m·K"
bom_nodes:
  piezoelectric-substrate:
    type: "component"
    urn: "URN:CNFX:ME:PIEZOELECTRIC_SUBSTRATE"
    interface_type: "physical-logic-coupled"
  interdigital-transducers-idts:
    type: "component"
    urn: "URN:CNFX:ME:INTERDIGITAL_TRANSDUCERS_IDTS"
    interface_type: "physical-logic-coupled"
  reflectors-in-some-saw-designs:
    type: "component"
    urn: "URN:CNFX:ME:REFLECTORS_IN_SOME_SAW_DESIGNS"
    interface_type: "physical-logic-coupled"
  packagingcasing:
    type: "component"
    urn: "URN:CNFX:ME:PACKAGINGCASING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 (QUALITY MANAGEMENT SYSTEMS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/filter-bandpasssaw.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "b5b120acf51777d20d21e521c4f2312aa85bcc0f15a5dad612aab3627b13c219"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Filter (Bandpass/SAW)

## 1. Technical Definition
An electronic component that selectively passes signals within a specific frequency range while attenuating others, used in receiver circuits.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1.8-2.5 GHz with 3 dB bandwidth of 20 MHz**. Failure boundary: **Input power exceeding 30 dBm causes irreversible piezoelectric substrate damage**, Mechanism: **Acoustic wave energy density surpassing the substrate's elastic limit (Young's modulus: 160 GPa for lithium niobate) leads to crystal lattice fracture**.

### 2.1 Analytical Physics Model
Governed by the **Combined Measurement Uncertainty**:

> **Primary Equation**: $u_c = \sqrt{\sum u_i^2}$  
> **Engineering Impact**: Defines the precision confidence interval for inspection.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| u_i | Standard Uncertainty components | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Electrostatic discharge (ESD) exceeding 500 V HBM | 8 | Interdigital transducer (IDT) electrode delamination from substrate | Integrated ESD protection diodes with clamping voltage of 5.5 V |
| Thermal cycling between -40°C and +85°C at 10°C/min gradient | 8 | Thermal expansion coefficient mismatch (Aluminum: 23.1 μm/m·K vs. LiNbO₃: 15.4 μm/m·K) causes solder joint fatigue | Gold-tin eutectic solder (Au80Sn20) with matched CTE of 16 μm/m·K |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | MHz | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Wafer Dicing Saw**, **Wire Bonder**, **Surface Mount Technology (SMT) Placement Machine**  
**Downstream Applications**: Smartphones, Wi-Fi Routers, Satellite Communication Systems  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the difference between Bandpass and SAW filters?
**A**: Bandpass filters are a general category that allow signals within a specific frequency range to pass, while SAW (Surface Acoustic Wave) filters are a specific type of bandpass filter that use piezoelectric substrates and interdigital transducers to achieve precise frequency selection with low insertion loss.

### Q: Why are piezoelectric materials like quartz used in SAW filters?
**A**: Piezoelectric materials like quartz, lithium niobate, and lithium tantalate convert electrical signals into mechanical surface waves and vice versa, enabling precise frequency control and excellent temperature stability in SAW filters for electronic applications.

### Q: How do SAW filters improve performance in receiver circuits?
**A**: SAW filters provide sharp frequency selectivity, high rejection of unwanted signals, and low insertion loss, which enhances signal clarity, reduces interference, and improves overall receiver sensitivity in computer, electronic, and optical systems.

## 6. Manufacturing Compliance
- ISO 9001:2015 (QUALITY MANAGEMENT SYSTEMS)

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Filter (Bandpass/SAW)](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/filter-bandpasssaw)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: FILTER_BANDPASSSAW | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: d4cbdba9
