Antenna Connector: Frequency Range 0-6GHz, VSWR <1.5:1

Q: What is the difference between SMA and RP-SMA connectors?

SMA connectors have a threaded male center pin and female outer shell, while RP-SMA (Reverse Polarity) reverses these genders to comply with regulatory restrictions on external antenna connections in some regions.

Q: How does impedance matching affect signal quality?

Mismatched impedance causes signal reflections (high VSWR), leading to power loss, reduced data throughput, and potential damage to RF components. A 50Ω standard minimizes these issues in cellular bands.

Component Specifications

Definition

An antenna connector is a specialized RF (radio frequency) component designed to interface between a cellular modem's internal circuitry and an external antenna. It ensures efficient transmission and reception of wireless signals by maintaining impedance matching (typically 50Ω), minimizing signal loss (insertion loss <0.3dB), and providing secure mechanical attachment. Key variants include SMA, RP-SMA, TNC, and N-type connectors, selected based on frequency range (e.g., 698-2700MHz for LTE), power handling (up to 100W), and environmental sealing (IP67).

Working Principle

Operates by establishing a coaxial connection that preserves the characteristic impedance (50Ω) of RF transmission lines. The connector's center conductor carries the signal while the outer shield provides grounding and electromagnetic interference (EMI) protection. Precision threading or snap-lock mechanisms ensure repeatable electrical contact and mechanical stability, with dielectric materials (e.g., PTFE) isolating conductors to prevent short circuits and signal degradation.

Materials

Center conductor: Beryllium copper or phosphor bronze (gold-plated for corrosion resistance); Outer shell: Nickel-plated brass or stainless steel; Dielectric: Polytetrafluoroethylene (PTFE) or polyethylene; Seals: Silicone O-rings for waterproofing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
VSWR	<1.5:1
Impedance	50Ω
Durability	500 mating cycles
Insertion Loss	<0.3dB
Interface Type	SMA female
Frequency Range	0-6GHz
Operating Temperature	-40°C to +85°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

IEC 61169, MIL-PRF-39012

Parent Products

This component is used in the following industrial products

Cellular Modem

A hardware component that enables wireless data communication over cellular networks.

View Product Details

Wireless Radio Module

A hardware component that enables wireless communication by transmitting and receiving radio frequency signals.

View Product Details

Engineering Analysis

Risks & Mitigation

Intermittent connection due to thread wear
Impedance mismatch from improper installation
Corrosion in humid environments

FMEA Triads

Trigger: Loose mating or cross-threading during installation
Failure: Intermittent signal loss or complete disconnection
Mitigation: Use torque wrenches (e.g., 5-7 in-lbs for SMA) and visual alignment guides

Trigger: Exposure to moisture without IP-rated sealing
Failure: Corrosion leading to increased insertion loss or short circuits
Mitigation: Specify IP67-rated connectors with silicone seals for outdoor deployments

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05mm for center conductor alignment

Test Method

VSWR measurement via vector network analyzer (VNA) per IEC 61169-1

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Antenna Connector

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

SMI Casting Limited

Shenzhen, Guangdong, CN

Also makes: Precision Machined Components, Plastic Injection Molded Part, Aluminum Heat Sink and 2 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Antenna Connector”
View source page ↗ smicasting.com · recorded 2026-09-08

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Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between SMA and RP-SMA connectors?