INDUSTRY COMPONENT

Reflectors (in some SAW designs)

Reflectors in SAW filters are metallic structures that reflect acoustic waves to create specific frequency responses in bandpass filters.

View Specifications

Component Specifications

Definition
Reflectors in Surface Acoustic Wave (SAW) filter designs are precisely patterned metallic electrodes deposited on piezoelectric substrates. They function by reflecting acoustic waves at specific points along the propagation path, creating constructive and destructive interference patterns that define the filter's frequency characteristics. These components are critical for achieving sharp roll-off, low insertion loss, and precise bandwidth control in RF and microwave applications.
Working Principle
Reflectors operate based on the principle of acoustic wave reflection at impedance discontinuities. When a SAW propagates along the piezoelectric substrate and encounters a metallic reflector pattern, part of the wave energy reflects back due to the mechanical and electrical boundary conditions. Multiple reflectors are arranged in periodic or weighted arrays to create standing wave patterns that selectively pass or reject specific frequency bands through interference effects.
Materials
Aluminum (Al) or aluminum-copper alloys (Al-Cu) with thicknesses of 100-200 nm, deposited on lithium niobate (LiNbO₃) or lithium tantalate (LiTaO₃) piezoelectric substrates. Gold (Au) may be used for high-reliability applications.
Technical Parameters
  • Pitch 0.8-2.0 μm (λ/2 to λ)
  • Aperture 20-100 λ
  • Reflectivity 0.7-0.95 per reflector
  • Number of Fingers 50-200 per reflector
  • Temperature Coefficient -40 to -80 ppm/°C
  • Insertion Loss Contribution 0.1-0.5 dB
Standards
IEEE 176, IEC 60122, MIL-STD-883

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Reflectors (in some SAW designs).

SAW reflector acoustic wave reflector bandpass filter component RF filter design piezoelectric substrate metallization pattern frequency control surface acoustic wave technology Reflectors (in some SAW designs) Reflectors (in some SAW designs) in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Filter (Bandpass/SAW)

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

View Product Details

Engineering Analysis

Risks & Mitigation
  • Metal migration under high power
  • Substrate cracking from thermal stress
  • Contamination during fabrication
  • Frequency drift with temperature changes
FMEA Triads
Trigger: Electromigration in thin metal films
Failure: Increased insertion loss and degraded frequency response
Mitigation: Use aluminum-copper alloys, implement current density limits, and apply protective coatings
Trigger: Piezoelectric substrate defects
Failure: Spurious responses and reduced stopband rejection
Mitigation: Implement strict incoming material inspection and use double-polished substrates

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1% frequency tolerance, ±0.05 μm pattern accuracy
Test Method
Network analyzer measurements (S-parameters), laser interferometry for displacement, SEM for pattern verification

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Related Components

Main Processor
Central processing unit for industrial IoT gateways enabling real-time data processing and communication in manufacturing environments.
Memory Module
Memory module for Industrial IoT Gateway data storage and processing
Storage Module
Industrial-grade storage module for data logging and firmware in IoT gateways
Ethernet Controller
Industrial Ethernet controller for real-time data transmission in Industrial IoT Gateways.

Frequently Asked Questions

What is the difference between reflectors and transducers in SAW filters?

Transducers convert electrical signals to acoustic waves and vice versa, while reflectors only reflect acoustic waves without energy conversion. Reflectors shape the frequency response through interference patterns.

How do reflector patterns affect filter performance?

Reflector pitch determines the center frequency, while the number and weighting of reflectors control bandwidth, sidelobe suppression, and roll-off characteristics. Optimized patterns minimize insertion loss and improve selectivity.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Request Manufacturing Insight for Reflectors (in some SAW designs)

Reflector Sheet Register Array