INDUSTRY COMPONENT

Patch Antenna Element

A compact, flat antenna element used in GPS modules for satellite signal reception and transmission.

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Component Specifications

Definition
A patch antenna element is a low-profile, planar antenna typically constructed on a dielectric substrate with a radiating patch and ground plane. In GPS antenna modules, it functions as the primary radiating element that receives L-band signals (1.57542 GHz for GPS L1) from satellites and transmits signals when required. Its design ensures circular polarization to maintain signal integrity regardless of orientation, with optimized gain and radiation patterns for reliable positioning accuracy.
Working Principle
Operates on microstrip antenna principles, where a resonant patch on a substrate radiates electromagnetic waves. The patch's dimensions determine the resonant frequency, matching GPS L1 band. It uses a feed line to couple RF energy, creating a radiation pattern with broad coverage for satellite visibility. Circular polarization is achieved through dual-feed or single-feed with perturbation techniques, reducing multipath effects and orientation sensitivity.
Materials
Substrate: FR-4, Rogers RO4003C, or ceramic materials with low dielectric loss; Patch and ground plane: Copper or aluminum with plating (e.g., gold, tin) for corrosion resistance; Protective coating: Conformal coating or epoxy for environmental protection.
Technical Parameters
  • Gain 3-5 dBi
  • Size Typically 25x25 mm to 50x50 mm
  • VSWR <2:1
  • Bandwidth 20 MHz
  • Frequency 1.57542 GHz (GPS L1)
  • Impedance 50 ohms
  • Polarization Right-hand circular (RHCP)
  • Operating Temperature -40°C to +85°C
Standards
ISO 11452-2, DIN EN 61000-4-3

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Patch Antenna Element.

patch antenna GPS antenna element microstrip antenna satellite reception L-band antenna electronic component RF design Patch Antenna Element Patch Antenna Element in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

GPS Antenna Module

A specialized antenna component designed to receive and transmit GPS signals for positioning and navigation applications.

View Product Details

GPS Receiver/Antenna

Electronic component that receives and processes GPS satellite signals for positioning and navigation

View Product Details

Engineering Analysis

Risks & Mitigation
  • Signal degradation due to substrate moisture absorption
  • Mechanical damage from vibration or impact
  • Interference from nearby electronic components
  • Thermal expansion affecting resonant frequency
FMEA Triads
Trigger: Poor solder joints or feed line damage
Failure: Reduced gain or complete signal loss
Mitigation: Implement automated optical inspection (AOI) and rigorous electrical testing during assembly.
Trigger: Substrate delamination under thermal stress
Failure: Frequency drift and impedance mismatch
Mitigation: Use high-temperature stable materials and conduct thermal cycling tests per industry standards.
Trigger: Corrosion from environmental exposure
Failure: Increased VSWR and degraded performance
Mitigation: Apply protective conformal coatings and specify corrosion-resistant platings.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1 mm for patch dimensions, ±5% for dielectric constant
Test Method
Anechoic chamber measurements for radiation pattern, network analyzer for S-parameters, environmental testing per IEC 60068-2

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.

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Frequently Asked Questions

What is the main advantage of a patch antenna in GPS applications?

Its low profile and planar design allow for easy integration into compact devices, while providing reliable circular polarization for consistent signal reception across orientations.

How does material choice affect patch antenna performance?

Substrate material impacts dielectric constant and loss tangent, influencing bandwidth and efficiency; high-quality materials like Rogers laminates reduce signal loss and improve GPS accuracy.

Can patch antenna elements be customized for different frequencies?

Yes, by adjusting patch dimensions and substrate properties, they can be tuned for various frequencies, but GPS applications typically standardize on the L1 band for compatibility.

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.

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