Technical Articles | Coaxwave SMA RF Connectors

Coaxwave SMA Technical Articles

Engineer-written technical articles covering frequency margin, impedance matching, connector type and polarity, surface finish, test & measurement, satellite / 5G applications, installation and troubleshooting. Click any title to read.

Impedance Matching

What Happens When You Mix 50 Ω and 75 Ω SMA? VSWR Test Data

Mixing 50 Ω and 75 Ω SMA connectors degrades VSWR significantly. We compare measured reflection and insertion loss data and give impedance-selection advice.

SMA 18 GHz vs 26.5 GHz Frequency Margin Analysis

SMA connectors are rated to 18 GHz, yet VNAs sweep to 20 GHz or 26.5 GHz. We explain real usable bandwidth from return-loss margin, standard vs precision construction, and measured data.

Right-angle vs Straight SMA: Space Saving Inside Dense Enclosures

Straight and right-angle SMA differ by more than a 90° turn. We quantify height savings, bend-radius requirements, and insertion-loss trade-offs for chassis wiring.

Panel-Mount SMA Male vs Female: How to Choose

Selecting male or female SMA for a panel involves torque, sealing, EMI shielding, and serviceability. We compare the four dimensions you should balance before cutting the hole.

Aerospace-grade SMA: CTE Analysis from −65 °C to +165 °C

Brass, stainless steel, beryllium copper, and PTFE expand at different rates. We analyze how thermal expansion and plating stability affect SMA performance across the aerospace temperature range.

Gold vs Nickel Plating: Contact Resistance After 96-Hour Salt Spray

We compare long-term reliability and contact-resistance change of gold and nickel plating for SMA connectors using neutral salt-spray testing.

Semi-rigid vs Flexible Cable for SMA: Insertion-loss Comparison

We compare insertion loss, phase stability, and flex life of semi-rigid and flexible cables terminated with SMA connectors at 6 GHz, 12 GHz, and 18 GHz.

SMA vs SMB vs SMC: How to Choose a Miniature RF Connector

SMA, SMB, and SMC are all miniature coaxial connectors, but coupling, frequency limit, and use cases differ. We give a side-by-side selection table.

SMA Connector De-embedding in VNA Measurements

Port extension, SOLT calibration, and line-loss compensation eliminate fixture-related SMA measurement errors in vector network analyzer tests.

Satellite L/S/C-band SMA Connector Selection: Phase Stability

Phase drift with temperature and mechanical stress, plus selection points for satellite vibration environments.

5G Base-Station SMA Jumpers: PIM Control and Torque Specification

Passive intermodulation sources, low-PIM connector requirements, and batch torque consistency for 5G base-station RF front ends.

Why Wi-Fi Routers Use RP-SMA Instead of Standard SMA

Reverse-polarity SMA swaps center pin and socket to prevent accidental mating with standard SMA. We explain the polarity reversal and antenna-matching notes.

SMA Connector Torque Specification: Too Tight vs Too Loose

Recommended torque values, and what happens when you over-torque or under-torque an SMA connector—dielectric cracking, raised contact resistance, and PIM.

SMA Connector Troubleshooting: Return Loss, Poor Contact, Worn Threads

From symptoms to root causes: a practical guide to diagnosing return-loss degradation, intermittent contact, and thread wear in SMA connectors.

SMA Connector Cleaning and Maintenance: Deformed Pins and Debris

How to prevent center-conductor deformation, remove debris, and clean SMA connectors with alcohol without damaging the interface.

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